2024年7月2日发(作者：咸宁口碑好的装修公司)
Owner’s Guide and
Installation Manual
Model N-084M
WARNING: If the information in this manual is not followed exactly, a fire or
explosion may result causing property damage, personal injury or death.
-Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
-WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch; do not use any phone in your building.
•Immediately call your gas supplier from a neighbor’s phone. Follow the
gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department.
-Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
CERTIFIED
Low NOx
Approved by
SCAQMD
SAR8006r
Rev. 10/05
Thank you for purchasing this Noritz Gas Water Heater. Before using, please:
Read this manual completely for correct installation and operation instructions.
Completely fill out the warranty registration card (included separately) and
mail the detachable portion to Noritz America Corporation.
Keep this manual (and the remainder of the warranty registration card) where it
can be found whenever necessary.
NORITZ America Corporation
*SAR8006 T*
2
Contents
2
Owner's Guide
Important 3
General Parts
.8
9
11
Setting and Using the 12
Flow 14
Muting the 16
Preventing Damage 17
19
21
25
26
27
Combustion Unit and 29
Hot-Water 31
Electronic 33
Electronic Control Unit, Remote Controller and .34
.35
36
36
Connect Multi .37
38
ng 38
40
43
44
47
49
50
51
55
55
ions and 56
-58
Remote Controller 62
Important Safety Information-1
To prevent damage to property and injury to the user, the icons shown below will be used to warn of
varying levels of danger.
Every indication is critical to the safe operation of the water heater and must be understood and
observed.
Potential dangers from accidents during installation and use are divided into the following three
categories. Closely observe these warnings; they are critical to your safety.
Icons warning of risk level
Danger
Denotes content that may result in instantaneous fire, serious injury
and even death when ignored.
Warning
Denotes content that may result in fire, serious injury and even
death when ignored.
Caution
Denotes content that may result in bodily injury and physical
damage when ignored.
Remarks
The content following this icon is necessary to understand for safe
and easy use of this water heater.
Other icons
Electric
High
Be sure
Shock.
Temperature.
to do.
Ground.
Prohibited
No flame.
Don’t
Don’t
Don’t touch
touch.
disassemble
with a wet
the equipment.
hand.
Danger
If you detect a gas leak:
Do not use the water heater if
not try to light any appliance
the exhaust pipe is displaced, has
not touch any electrical
holes, or is corroded.
switch; do not use any phone in
your building.
ately call your gas
supplier from a neighbor’s phone.
Follow the gas supplier’s
4.
instructions.
If you cannot reach your gas
supplier, call the fire department.
3
Important Safety Information
-
2
Warning
If you detect abnormal combustion
or abnormal odors, or during an
earthquake, tornado or fire:
off the hot water supply
off the power to the water
heater
off gas and water at the
main
t the nearest Noritz agent
Be sure the gas/power supplied
matches the gas on the rating
plate.
For Natural Gas
Check the temperature of the
running hot water before
entering the shower.
Check the temperaturebefore
stepping into the bath tub.
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to
bathe unsupervised.
Consult the nearest Noritz agent if
the water heater location needs to
be changed.
Contact a qualified service
technician for any necessary
repairs, service or maintenance.
Do not turn off the water heater or
change the water temperature while
someone is using.
Contact Noritz before using with
a solar pre-heater.
4
Warning
Do not place combustibles such as
[When installing indoors]
laundry, newspapers, oils etc. near
Check the air supply
the heater or the exhaust vent
vent for dust or
terminal.
obstructions.
Exhaust vent
terminal (indoor
installation)
Leave the proper clearance between
the water heater and nearby objects
Unit
(trees, timber, boxes with flammable
materials etc.).
Min. 3" from
vent pipe
Left side:
Min. 2"
Right side:
Do not use combustible chemicals
Front:
Min. 2"
such as oil, gasoline, benzene etc.
Sug. 24"
in the vicinity of the heater or the
*
exhaust vent terminal.
*
Indicates suggested clearances for
maintenance.
Do not place or use a spray can
near the heater or the exhaust vent
terminal.
5
Important Safety Information
-
3
Caution
Be sure to electrically ground the
unit.
Do not touch the power cord with
wet hands.
Do not touch the exhaust vent pipe
during or immediately after
operation of the water heater.
Keep power cord free of dust.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
If this unit will be installed in a
salon or other location where hair
spray or aerosols will be used,
locate the unit in a seperate area
that is supplied with fresh air from
outdoors.
Do not install in locations where
excessive dust or debris will be
in the air.
Do not use a broken or modified
power cord. Do not bind, bend or
stretch power cords.
Do not scratch, modify, or subject
them to impact or force.
Do not use the water heater for
other than hot water supply,
shower and bath.
6
Remark
Do not drink water that has been inside the
unit for an extended period of time. Do not
Do not disassemble the remote controller.
drink the first use of hot water from the
unit in the morning.
Do not use benzene, oil or fat detergents
to clean the remote controller.
Clean the filter on the water inlet as
frequently as required by the quality of
This may cause deformation.
your local water.
Do not get the remote controller wet.
Keep the area around the unit clean.
Although it is water resistant, too much water can
cause damage.
If boxes, weeds, cobwebs, cockroaches etc. are in
the vicinity of the unit, damage or fire can result.
Do not splash water on the remote
controller. Do not expose the remote
Do not install the equipment where the
controller to steam.
exhaust will blow on walls or windows.
Do not locate the remote controller near stoves or
ovens, this may cause damage or failure.
Treat hard, acidic or otherwise impure
supply water with approved methods to
Preventing damage from freezing (
p.17)
ensure full warranty coverage.
Damage can occur from frozen water within the
device and pipes even in warm environments.
Problems resulting from scale formation
Be sure to read below for appropriate measures.
are not covered by the warranty.
Repairs for damage caused by freezing are not
covered by the warranty.
Check ignition during use and extinction
after use.
Take necessary measures to prevent
freezing of water and leakage of gas when
leaving the unit unused for long periods of
This unit is only approved for installation
time. (
p.18)
up to 4500 ft. above sea level.
For installations at higher elevations, contact Noritz
America for Instructions.
If it is snowing, check the air inlet, exhaust
gas vent and exhaust vent terminal for
blockage.
Do not use parts other than those specified
for this equipment.
7
General Parts
Main Unit
Indoor/Outdoor Wall Mounted, Power Vented Model
Flue Collar
Front Cover
Air Inlet
Water Drain Valve (with Water Filter)
(Inside Water Inlet) (
Pressure Relief Valve
Water Supply Valve
p.20)
Gas Supply Valve
*The above illustration shows an example of installation.
The exact installation configuration may be slightly different.
8
Remote Controller (RC-7646M-2)
Display
Setting Buttons
(
next page)
For setting the hot
water temperature,
the flow meter alarm,
and other settings.
Power On/Off Button
For turning the
heater on and off.
Flow Meter Alarm Set Button
For setting the flow
meter alarm.
(
p.14 and 15)
* Before use, remove the protective sheet from the remote controller surface.
* The unit has been shipped from the factory with the remote controlset at 110°F.
9
Display
The illustration below shows the remote controller display. What is actually displayed
depends on how the water heater is set.
Burner On Indicator
Priority Indicator
Temperature Setting
(Ex.: 110°F)
Flow Meter Setting
The display will flash
after hitting the flow
meter alarm set button.
(
p.15)
When this indicator
is lit, the hot water
temperature can be
set. (
p.13)
Error Code
A number will flash if
a failure occurs.
(
p.24)
10
Initial Operation
Before the first use of your water heater, make the following preparations.
Follow steps
1 through 4
.
1
Open the water supply valve.
CLOSED
OPEN
2
Open a hot water fixture to confirm that
water is available, and then close the
fixture again.
Hot water fixture
3
Open the gas supply valve.
4
Turn on the power.
11
How to Use
Setting and Using the Water Heater
2
1
(Starting with the Power Off)
1
Press the Power
On/Off Button.
On
The temperature will be
displayed on the remote
control thermostat.
On
Previous set
temperature
(Ex.: 110°F)
Caution
To prevent scalding:
High Temperature
Temperatures above 125 °F can scald.
•Check the water temperature by hand before bathing or
showering.
•When setting the unit to 125°F or higher, the
temperature display will flash for 10 seconds as a high
temperature warning.
•Take caution when using the unit again after setting to
125°F or higher. Always check the set temperature
before use.
•Do not allow anyone to change the water temperature
while hot water is running.
Remote Controller Display
Flashes for 10 sec
12
2
(
Set temperature.
Always check the
temperature setting
before use.
)
3
Turn on hot
water.
4
Turn off the hot
water.
Hot
Cold
Check the indicator lights.
On
Off
Water temperature
(
°F
:
)
The temperature settings below are examples. The temperature setting
necessary depends on the usage, the length of piping and the time of year.
100
Washing
dishes, etc.
0 180
Shower, hot water
supply, etc.
High temperature
If fixtures incorporate mixing
valves, set the temperature
higher than usual.
*Initial factory setting is 110°F
*For most residential applications, the recommended setting temperature is 120°F or less.
For applications that occasionally require a higher temperature setting, locate the remote controller
in a convenient location (
p.62).
*Consult local codes for minimum operating temperatures.
13
How to Use
Flow Meter Alarm
2,3
1
3
(Starting with the power off)
Preparation
1
Press the Power
On/Off Button
On
2
(
Set temperature.
Always check
temperature setting
before use.
)
the bath drain.
Hot
Cold
The temperature will be displayed
on the remote control thermostat.
On
Check the indicator lights.
Previous set temperature
(example:110°F)
Water temperature
14
An alarm will sound for ten
Water Temperature
seconds when the flow
The temperatures settings below are only examples. The
reaches the set level.
(
°F
:
temperature setting necessary will depend on the usage,
the length of piping and the time of year.
)
120
The water will continue to run unless it is
WarmWarmerHot
manually turned off.
* Initial factory setting: 110°F
To set the flow meter alarm:
3
Adjust flow meter
alarm setting.
4
Turn on hot
water.
5
Turn off the hot
water when the
alarm sounds.
Press the flow meter alarm set button
The alarm will sound when
(the setting will flash on the display)
the set level has been
and adjust with the setting buttons.
reached. Stop the water.
Increase
Decrease
Choose the flow meter alarm setting
from the following options: 10 - 60
(In 5 gallon intervals), 70 - 100 (In
The alarm will not
10 gallon intervals), or 990 gallons.
Note:
sound if it is set for
Note:
The alarm will not sound if
990 gal.
it is set for 990 gal.
On
Off
Flow meter setting will be flashing
(ex. 45 gal.)
*The level can only be adjusted
while the indicator is flashing.
*After ten seconds, the remote
will again display the temperature.
If the flow meter alarm is being used to indicate when a tub is full:
•If any hot water is being used besides what is going into the tub, the alarm will sound before
the tub is full.
•If there was water in the tub before the fill began, or if the water is not shut off manually when
the alarm sounds, the tub may overflow.
•If there was water in the tub before the fill began, the temperature in the tub after it is full may
be different from the temperature setting.
15
How to Use
Muting the Remote Controller
1
The remote controller will emit a sound
when any button is pushed. This sound
can be muted if it is desired.
* Initial factory setting is with sound.
1
With the remote controller
off, hold the Power On/Off
Button for five seconds.
Muted
No sound
after 5 sec.
Sound
Tone sounds
after 5 sec.
The flow meter alarm cannot be muted.
16
Preventing Damage from Freezing
-1
Remarks
*Damage can occur from frozen water within the device and pipes even
in warm environments. Be sure to read below for appropriate measures.
*Repairs for damage caused by freezing are not covered by the warranty.
Freezing is prevented within the device automatically by the freeze-prevention heater
Freezing cannot be prevented when the power is not remove the power plug
from the wall outlet.
(Freezing will be prevented regardless of whether the operation switch is ON or OFF.)
*The freeze prevention heaters will not prevent the plumbing external to the unit from freezing.
Protect this plumbing with insulation, heat tape or electric heaters, solenoids, or pipe covers.
If there remains a freezing danger, contact the nearest Noritz agent.
Take the measures below for extremely cold temperatures*.
(outside temperature including wind chill factor less than 5°F)
This method can protect not only to the heater, but also to the water supply,
water piping and mixing valves.
the unit on with the Power Button on the Remote Controller.
the gas supply valve.
a hot water fixture and let it run for approx. 1 minute, and
then check that the number 11 is flashing on the remote controller
display.
* If multiple units are being used, drain one minute for each unit.
* It is possible that a different number may be displayed on the
remote controller, but as long as it is flashing, you may continue.
Hot Water Fixture
lly close the hot water fixture, but keep a small amount of hot
water running (.1 gal./minute or about .2” thick).
* If there is a mixing valve, set it to the highest level.
* When linking multiple units, discharge water equivalent to
.1 gal./minute per unit.
flow may become unstable from time to time. Check the flow
.2
"
thick
30 minutes later.
*Remember to set mixing valves and fixtures to their original levels before using the unit again
to prevent scalding.
*If there is still a chance that the unit will freeze, drain the unit as on the next page.
If water will not flow because it is frozen:
the gas and water valves.
off the power button.
the water supply valve from time to time to check whether water is running.
the water is flowing again, check for water leaks from the equipment and piping
before using.
If the heater or the piping is frozen, do not use the heater or it may get damaged.
17
Preventing Damage from Freezing
-2
If the water heater will not be used for a long period of time,
Drain the water.
Drain the water as follows:
Caution
High Temperature
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain hot
after it is turned off.
Drain water into a bucket to prevent water damage.
the gas valve.
2.(1) Turn the power on.
(2) Turn and leave open the hot water fixture for more than 1 minute and close.
*If multiple units are being used, drain one minute for each unit.
Fixture
*An 11 Error Code may appear on the remote control.
This is not a malfunction of the unit. Do not turn Power ON/OFF Button OFF.
the water supply valve, disconnect
the electrical power supplied to the unit.
Do not touch with wet hands.
open all hot water fixtures.
Fixture
all drain plugs and drain the water out
of the unit.
the water is completely drained, replace all drain
plugs and close the hot water fixtures.
Drain Plugs
Turning the Unit Back On
that all drain plugs are inserted.
that all hot water fixtures are closed.
the procedure on p.11 “Initial operation”, steps 1 through 4.
18
Regular Maintenance-1
Periodic Inspection
Caution
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain
High Temperature
hot after it is turned off.
Check
For laundry, newspaper, timber,
oil, spray cans and other
Check
For dust and soot in
the exhaust vent or
combustible materials. (
p.5)
exhaust vent terminal.
Check
For abnormal sounds
during operation.
Check
For dust or debris in
the air inlet.
Check
For abnormalities in
external appearance,
discoloration or flaws.
Check
For proper operation of
pressure relief valve.
Check
For water leaks from the
equipment and piping.
Periodic Maintenance
Equipment
Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to
clean any stains.
Remote Controller
Wipe the surface with a wet cloth.
•Do not use benzene, oil or fatty detergents to clean the remote controller;
deformation may occur.
•The remote controller is water resistant but not water proof. Keep it is dry as possible.
19
Regular Maintenance-2
Periodic Maintenance
Water Drain Valve (with Water Filter)
If the water drain valve (with water filter) is covered with debris, the hot water may not run
smoothly, or the unit may put out cold water. Check and clean the filter as explained below.
*To avoid burns, wait until the equipment cools down before draining the water.
The appliance will remain hot after it is turned off.
* Water will be discharged from the trap plug. Place
a container, etc. to receive the discharged water.
the water supply valve.
all hot water fixtures.
the inlet and outlet drain plugs (about
0.3 gal. will drain out)
the water drain valve (with water filter) out
of the inlet. (See illustration to right).
the water drain valve (with water filter) with
a brush under running water.
e the water drain valve (with water filter).
(Take care not to lose the packing.)
all hot water fixtures.
the water supply valve and check that
water does not leak from the drain plugs or water
drain valve (with water filter).
Inlet
Packing
Drain Plug
(with filter)
Water Supply
Valve
Optional Maintenance
Water Heater Service Valves (IK-WV-2)
*Isolator valve kits may be purchased as an
accessory from Noritz (Part #IK-WV-2).
They allow for one man full diagnostic testing
and easy flushing of the system.
Hot Water
Service Valve
Pressure Relief Valve
Cold Water
Service Valve
*The kit includes two full port isolation valves
and a pressure relief valve for the hot side.
Contact Noritz for more information.
Drain
Water Outlet
Water Intlet
20
Troubleshooting-1
Initial Operation
Unit does not attempt to ignite
when water is running.
•Is water running?
•Check for reversed plumbing or crossed pipes.
•Check the water drain valve filter. (
Unit attempts to ignite but fails
p.20 )
•Reset unit and try again. There may be air in the gas line.
•Have a professional check the gas supply pressure.
Temperature
Hot water is not available
when a fixture is opened.
•Are the gas and water supply valves fully open?
•Is the water supply cut off?
•Is the hot water fixture sufficiently open?
•
Is the gas being cut off by the gas meter ?
(Can other gas devices such as stoves be used?)
•(For LP) Is there enough gas in the tank?
(Can other gas devices such as stoves be used?)
•Is the water drain valve filter clogged? (
•Is the power button turned on?
No water is available when
a fixture is opened.
The hot water is not the correct
temperature.
Water takes time to become hot
when turning the hot water fixture.
The water is too hot.
•Is the water supply cut off?
•Is the heater frozen?
•Is the hot water fixture sufficiently open?
•Have you allowed enough time for the cold water in the
pipes to drain out?
p.20)
•Are the gas and water supply valves fully open?
•Is the water temperature setting appropriate?
(p.12 and p.13)
•If the water supply temperature is high, it is possible
for the temperature to be higher than the temperature
set on the remote controller.
•If only a small amount of hot water is demanded, it is
possible for the temperature to be higher than the
temperature set on the remote controller.
•If the supply water goes through a solar pre-heating
system, it is possible for the temperature to be higher
than the temperature set on the remote controller.
21
Troubleshooting-2
Temperature
The water is not hot enough.
•Are the gas and water supply valves fully open?
•Is the water temperature setting appropriate?
(
p.12 and p.13)
•If the amount of hot water required is very high, it is
possible for the temperature to be lower than the temp-
erature set on the remote controller.
Decrease the amount of water passing through the unit
and the temperature should stabilize.
•The unit will not heat the water if the flow rate is less than
0.7 gallons per minute.
Open the fixture more or open other fixtures so that a greater
flow passes through the unit, and the unit should begin
heating again.
•Set water temperature at 115°F to 120°F. This will allow you
to use a higher flow of hot water thus meeting the minimum
flow requirement of 0.7 gpm.
•Clean the water filter of any debris (
p. 20)
The water is cold when only a
single fixture is open.
Fluctuations in hot water
temperatures.
Amount of Hot Water
The amount of hot water at a
certain fixture is not constant.
•When hot water is demanded at other fixtures, the
amount available may be reduced. The maximum flow
available from this unit is 8.4 GPM at a 45°F temp. rise.
•Pressure fluctuations and other plumbing conditions can
cause the temperature and pressure at a fixture to be
unstable, but it should stabilize after a short time.
•There are some types of hot water taps that discharge large
volumes of hot water initially, but stabilize after time.
•To keep the temperature stable, the heater limits the
amount of water that can flow through it to a small
amount initially, but the amount increases over time.
The amount of hot water in the tub
•When hot water is used for other fixtures while filling the
is less/more than the set amount.
bath tub, the tub will not fill as much.
•If there is water in the tub already, or when filling is stopped
and resumed, the tub will fill more.
The flow meter alarm does not
sound even when filled to the set
amount.
•The flow meter alarm is set to sound when hot water
is continuously discharged for the set volume of water. If mixing
valves are used, or if cold water is mixed with hot water at the
fixture, the tub will fill more than the setting of the flow meter
alarm.
•Is the water drain valve filter clogged? (p.20)
Amount of hot water available
has decreased over time.
22
Remote Controller
The light on the power button
does not come on.
The water temperature changes
after a power failure or when the
power is disconnected.
•Has there been a power failure?
•Is the power connected properly?
•The temperature setting and the flow meter alarm setting
may both need to be reset after a power outage.
Sounds
The fan can be heard after
operation is stopped.
A motor can be heard when turning
the unit ON or OFF, when opening
or closing a fixture, or after the unit
has been running for a while.
•These noises indicate the proper operation of devices
which are designed to let the unit reignite more quickly,
and ensure the water temperature is stable.
Other
The heater stops burning during
operation.
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water fixture sufficiently open?
• Is the gas being cut off by the gas meter?
(Can other gas devices such as stoves be used?)
• (For LP) Is there enough gas in the tank?
(Can other gas devices such as stoves be used?)
•This is normal. The white smoke is actually steam.
•This is harmless. Small air bubbles appear as the
water is heated and depressurized rapidly to
atmospheric pressure.
•When the unit is under very high pressure, water will leak
from the drain plugs as a safety so that the unit is not
damaged by the high pressure.
White smoke comes out of the
exhaust vent on a cold day.
The hot water is turbid.
Water leaks from the drain plugs
on the outlet.
23
Troubleshooting-3
Other
The water appears blue or
The bath tub/wash-basin has turned
blue
•This can be caused by a reaction of copper ions in the
water with fat particles (furring). This is not a health risk,
and the discloration of the tub or basin can be cleaned.
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Check for an Error Code
If there is a problem with the unit, a numerical error code will flash on the remote controller.
If this occurs, take appropriate measures as listed below.
Flashing
When an error code appears, the display and the operation light will flash
together.
Remote Controller
Error CodeCause
Ignition error
Action
Check whether the gas valve is open. Press the power
button to turn the unit off, open a hot water fixture,
and turn the unit back on. If the flashing number
doesn't return the problem is solved.
Have a professional check the gas supply pressure.
Contact the nearest Noritz agent.
Contact the nearest Noritz agent.
Abnormal combustion,
low gas supply pressure
Abnormal combustion
Contact our sales agent if:
•Any other error code appears.
•An error code is indicated again after the above actions were followed.
•There are any other questions.
24
Follow-up Service
Requesting Service
First follow the instructions in the troubleshooting section (p.21 to p.24).
If the error is not corrected, contact our sales agent.
We will need to know:
.(check the rating plate)
*See p.4 for the location of the label
Date (see the warranty)
Details (flashing error codes,
etc., in as much detail as possible)
Your name, address, and telephone number
Desired date of visit
*A request for service may be rejected if the water heater is installed
in a location where working on the unit may be dangerous. Contact a
plumber.
Warranty
A warranty registration card is included separately.
Be sure that the plumber, date of purchase and other necessary items are filled in.
Read the content carefully, and keep the warranty card in a safe place.
For repairs after the warranty period, there will be a charge on any service, and service will only
be performed if the unit is deemed repairable.
Period of Time for Stocking Repair Parts
Noritz will stock repair and maintenance parts for this unit for a minimum of seven years after
production has ceased.
Reinstallation
If you want to reinstall the appliance at a different location, confirm that the gas and power
supply indicated on the rating plate are available at the new location. If you are not sure,
consult the local utility company.
If you move to a region that uses a different type of gas, conversion and adjustment of the
appliance will be necessary. This work must be performed by Noritz and will be charged for
even during the warranty period.
25
Specifications
•Specifications may be changed without prior notice.
•The capacity may differ slightly, depending on the water
pressure, water supply, piping conditions, and water temperature.
Specifications
Item
Model Name
Type
Ignition
Operating Pressure
Minimum Flow Rate
Dimensions
Weight
Water Holding Capacity
Connection Sizes
Installation
Air Supply/Exhaust
Specification
N-084M
Indoor/ Outdoor, Wall Hanging
Power Vented
Direct Ignition
15-150 PSI
0.7 GPM
24.2"(Height) x 18.3"(Width) x 9.4"(Depth)
63 lbs.
0.3 Gallon
3/4"
3/4"
3/4"
120 VAC (60Hz)
NG:80W, LP:93W, Freeze Prevention 135W
Zincified Steel Plate/Polyester Coating
Stainless Steel
Copper Sheeting, Copper Tubing
Flame Rod, Thermal Fuse, Pressure Relief Valve,
Lightning Protection Device (ZNR),
Electric Leakage Prevention Device (GFCI), Overheat
Prevention Device, Freezing Prevention Device,
Fan Rotation Detector
Remote Controller, Remote Controller Cord,
Anchoring Screws
Power Supply
Materials
Water Inlet
Hot Water Outlet
Gas Inlet
Supply
Consumption
Casing
Flue Collar
Heat Exchanger
Safety Devices
Accessories
Performance
Item
Gas
Consumption
NG
LP
Maximum Hot Water Capacity
45°F Rise
Capacity Range
Temperature Settings
Default Temperature Options
Maximum PerformanceMinimum Performance
236,000 btuh21,000 btuh
236,000 btuh21,000 btuh
8.4 Gal./min.
0.7-8.4 Gal./min.
100-150°F (In 5°F intervals),
160, 170, 180°F (In 10°F intervals) (14 Options)
120,130,140,180°F(Original is 120°F)
26
External outfitting
074
016
074
015
010
017
072
018
025
070
012
001
026
003
002
071
009
007
008
006
003
070
034
013
035
014
070
004
002
073
005
27
External outfitting
Part Nos.
001
002
003
004
005
006
007
008
009
010
012
013
014
015
016
017
018
025
026
034
035
N-084M Front set-AS
Front packing S AAP
Front packing L AAP
Lamp seal plate DEC
Connection diagram label EJM
Caution label 1 EAU
Caution label 2 EAU
Raintight seal plate BUB
Plug insulation sheet CRU
Exhaust box EDM
Exhaust joint packing DHN
Wiring coupling BXK
Grommet CXP
Exhaust sylinder packing EDL
Case top cover 2 EDL
Case top cover EDM
Case top packing EDM
Case EJM
Air themistor BWC
Junction box set EHU
Junction box packing EHU
Part NamesOrder Nos.
SBP7632
AAPL015
AAPL017
DECK008
EJMK001
EAUK003
EAUK004
BUBK004
CRUK002
EDMF001
DHNL003
BXKA022
CXPA026
EDLL002
EDLA005
EDMA003
EDML001
EJMA001
BWCH003
EHUA008
EHUL002
Q'ty/unit
1
2
2
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
070
071
072
073
074
Cross recessed round-head collar N-tapping screw 4X8
Cross recessed truss type3 EVERTIGHT tapping screw with PW 4X12
Cross recessed round-head collar N-tapping screw 4X10
Cross recessed round-head collar type3 EVERTIGHT tapping screw 4X12
Cross recessed truss type3 S TIGHT tapping screw 4X10
28
Combustion unit and gas route
100
109
102
101
110
117
105
116
126
070
117
103
131
104
070
118
171
172
111
114
112
115
170
173
070
070
141
132
129
128
176
072
125
070
173
070
175
175
119
122
121
120
121
123
172
171
127
124
172
073
29
Combustion unit and gas route
Part Nos.
100
101
102
103
104
105
109
110
110
111
112
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
131
132
141
141
Combustion tube set EAC SET-V
Flame rod DLK SET-V
Plug packing(for N) DLK
Ignition plug SET-V
Burner sensor DLK SET-V
Plug fixing plate(for N) DLK
Suction air joint packing DHN
Manifold set 15 EDM SET-AS
Manifold set 24 EDM SET-AS
Solenoid S16L CRU SET-AS
Solenoid S24L CRU SET-AS
O-ring S30 type1A
O-ring S-38
Manifold seal packing top CRP
Manifold seal packing side CRP
Manifold seal packing bottom CRP
Fan moter DKE
Manifold pipe set EDM
O-ring P25.5
Gas mech. S24DQ CRP SET-V
O-ring JASO 2028A
Gas fitting 20A SET EJH
Mounting plate for burner case DLT
Main damper11 CRP
Conduit R10 EDM
Igniter CRP
High-voltage cord 470
Mounting plate for igniter EAC
Mounting plate for igniter DTJ
Bell-mouse ø44 CRU
Bell-mouse ø48 CRU
Part NamesOrder Nos.
SBP7302
SBA7506
DLKL012
SBA7504
SBA7505
DLKC009
DHNL002
SBE7875
SBE7874
SAQ7346
SAQ7406
SAD6433
SAD6372
CRPL002
CRPL004
CRPL003
DKEF030
EDME006
SAB1512
SAQ7708
8590109
EJHE001
DLTC001
CRPC052
EDMJ006
CRPJ002
SAC1229
EACC011
DTJA015
CRUC045
CRUC046
Q'ty/unit
1
1
1
1
1
1
1
1
1
3
1
3
1
1
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
170
171
172
173
175
176
Cross recessed round-head type3 EVERTIGHT tapping screw 5X16
Cross recessed hexagon head machine screw M4X8
Cross recessed round-head machine screw M4X8
Cross recessed round-head N-tapping screw 4X8
Cross recessed round-head SPAKmachine screw with guide M4X12
Cross recessed round-head collar N-tapping screw 4X12
30
Hot-water feed route
425
412
424
456
413
433
402
434
A
401
508
400
D
507
427
456
428
421
412
434
423
B
406
413
510
173
468
402
407
470
417
402
402
C
409
408
472
471
412
406
471
435
173
414
452
410
172
412
456
413
511
442
509
418
411
413
434
073
441
A
511
508
413
435
422
412
434
456
458
507
444
420
B
463
176
428
D
454
434
172
453
437
456
172
431
434
434
445
456
440
446
455
443
439
447
438
C
418
509
172
509
418
073
(Thermal fuse rounding procedure)
(Left side view)
(Front side view)(Right side view)
(Rear side view)
402
Thermal fuse fastener
402
Thermal fuse fastener
Heater fastener
408
407
Freeze preventive heater
Thermal fuse
401
Thermal fuse fastener
402
31
Hot-water feed route
Part Nos.
400
401
402
406
407
408
409
410
411
412
413
414
417
418
420
421
422
423
424
425
427
428
431
433
434
435
437
438
439
440
441
442
443
444
445
446
447
452
453
454
455
456
458
463
468
470
471
472
Heat exchanger EJM SET-AS
Thermal fuse DHN SET-V
Thermal fuse fastener CXD
Thermal fuse cover DHN
Freeze preventive heater CRP SET-V
Heater fastener EHK
Remaining flame safety device 96 EHU
Water flow servo set 2 DZT
Heat exchanger thermister BWC
O-ring P4C
Thermistor holding plate ALS
O-ring P20C
Water flow servo set 1 DZT
Freeze preventive heater 3 BGD
O-ring P22C
Hot-water feed pipe DHN
Bypass pipe EAC
Hot-water thermistor BWC
Water flow sensor set 3 DUV
Water inlet thermistor BWC
Water outlet magnetic sensor BWC
O-ring P12.5C
Water inlet pipe EAC
Quick fastener 13-22
O-ring P16C
Shut-off cock AXG
Water inlet fitting 20ASET EJM
Water filter (SUS) EGB
O-ring 16DF BRQ
Water filter DTJ
Drain cock CRU
Hot-water resistant O-ring P3
Mixing coupling EAC
Mixing body EAC
Mixing cylinder BWC
QMF safety valve
Hot-water resistant O-ring P9
Hot-water outlet fitting EJM
O-ring P11C
Quick fastener 12.7
O-ring JASO 2026 type4 C
Quick fastener 16A
Water flow sensor SET1 DUV
Magnetic sensor BWC
Thermostat BHV
Conduit 86 DZT
Waterproof cover CZL
servo motor cable conduit DZT
Part NamesOrder Nos.
SKA7139
SBA7398
CXDH003
DHNA014
SAQ7745
EHKH001
EHUH001
DZTD011
BWCD098
1323709
ALSD088
3059502
DZTD010
BGDH002
7573308
DHND010
EACD003
BWCD096
DUVD019
BWCD097
BWCD090
3359808
EACD001
SAD6537
3223302
AXGD089
EJMD002
EGBD032
BRQL008
DTJD006
CRUD003
SAD6633
EACD007
EACD013
BWCD035
SAA2811
SAD6635
EJMD001
1326503
6340202
SAA6483
6340300
DUVD017
BWCD093
BHVH002
DZTJ008
CZLD041
DZTJ009
Q'ty/unit
1
1
3
2
1
1
1
1
1
5
5
1
1
3
1
1
1
1
1
1
1
2
1
1
7
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
1
1
1
1
2
1
507
508
509
510
511
Cross recessed truss P TIGHT screw 4X10
Cross recessed round-head P TIGHT screw 4X14
Cross&straight recessed round-head collar type3 S TIGHT tapping screw 4X8
Cross&straight recessed type3 S TIGHT tapping screw 4X8
Cross recessed round-head P TIGHT screw 4X14
32
Electronic control unit
705
703
707
070
700
731
706
070
176
714
070
716
708
732
704
176
070
701
731
Remote controller
751
753
kitchen remote controller
(RC-7646M-2-USA)
752
754
755
Attached set
801
Special partSpecial part no.
802
instruction manual
888
33
Electronic control unit, Remote controller and Attached set
Part Nos.
700
701
703
704
705
706
707
708
714
716
Relay case EHU SET-AS
Harness EJM
Lamp cable conduit CRP
Current leakage safety device DTJ
Relay case cover DEK
Transformer EDN
Transformer cover DJP
Mounting plate for terminal block DZT
Nylon clamp HP-4N (NK-4N)
Conduit 90-2 CCP
Part NamesOrder Nos.
SHA7682
EJMJ002
CRPJ014
DTJJ015
DEKA014
EDNJ006
DJPA054
DZTA006
7287909
CCPJ028
Q'ty/unit
1
1
1
1
1
1
1
1
2
1
731
732
Cross recessed bind machine screw M3.5X6
Cross recessed round-head N-tapping screw 4X12
751
752
753
754
755
RC-7646M-2 body USA QME
Drssed frame body QME
Wall packing QHU
Oar plug 6X25
Cross recessed round wood screw 4.1X25
QMEJ005
QMEA003
QHUA115
1
1
1
800
801
802
888
N-084M packing SET V
Cross recessed round-head type1 tapping screw 5X35
Remote controller cord S SET EAU
Instruction manual N-084M
SBP7633
EAUM001
SAR8006
1
1
1
34
Installation Manual
N-084M
(Indoor/Outdoor Installation)
NORITZ AMERICA
CORPORATION
GAS WATER HEATER
WARNING:
If the information in this manual is not followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
Potential dangers from accidents during installation and use are divided into the following three
categories. Closely observe these warnings, they are critical to your safety.
Danger
Warning
Caution
Prohibited
Danger of serious injury or even death as well as danger of fire when the
product is misused by ignoring this symbol.
Possibility of serious injury or even death as well as possibility of fire when
the product is misused by ignoring this symbol.
Possibility of bodily injury or damage to property when the product is
misused by ignoring this symbol.
Disconnect
Power
Ground
Be sure to do
Requests to Installers
Caution
•In order to use the water heater safely, read this installation manual carefully,
and follow the installation instructions.
•Failures and damage caused by erroneous work or work not as instructed in this manual are not
covered by the warranty.
•Check that the installation was done properly in accordance with this Installation Manual upon
completion.
•After completion of installation, be sure to hand the Operation Manual (with warranty) to the
customer upon filling in all of the required items.
Installation must conform with local codes, or in the absence of local codes, the National Fuel Gas
Code, ANSI Z223.1/NFPA 54.
35
1.
Included Accessories
Part
Tapping Screw
Remote Controller
(See p. 52)
Shape
Q’ty
The following accessories are included with the unit.
Check for any missing items before starting installation.
Part
Installation Manual
(this document)
Remote Controller
Cord (10 ft)
Shape
Q’ty
5
1
1
1
2.
Optional Accessories
Part
VC4 Outdoor
Vent Cap
Shape
Q’ty
The accessories listed below are not
included with the units, but may be necessary
for installation.
PartShape
Q’ty
1
System Controller
1
Quick Connect
Cord
1
Remote Controller
Cord (26 ft)
1
PC-84M
Pipe Cover
1
Isolator Valves
(includes pressure
relief valve)
1
Outdoor Remote
Control
Junction Box
1
36
3.
Quick Connect Multi System Installation
•The Quick Connect Multi System allows the installation of two units together utilizing only the Quick
Connect Cord.
The Quick Connect Cord is 6 ft. long. Install the two units 18.5"-37.4" apart at the center to
ensure the cord will be able to reach between the units. (See Typical Plumbing diagram).
(If the distance between the two units is too great, not only will the cord not be able to reach,
but the water temperature may also become unstable because of the difference in pipe length
between the two units.)
System Diagram
Quick Connect
Cord
Cord
Connector
Cord
Connector
Terminal Block
Remote Controller
* When connecting 2 devices, use only a
single remote controller.
Note: Connect the remote
controller to only one
of the devices.
Remote Controller Cord
Gas Supply Piping
Cold Water Supply
Hot Water
G
Typical Plumbing
Distance at center: 18.5-37.4 in.
Distance on sides
0.19-19 in.
Union
Quick Connect
Cord
Union
Make this distance as short as possible.
* The hot water temperature will
become unstable as the pipe
length increases.
Pressure
Relief
Valve
Shutoff
Valve
Union
Gas Valve
Shutoff Valve
Shutoff
Valve
Hot Water
Cold Water
Leave enough clearance around the plumbing
to apply insulation. It will be necessary to add
bends to the piping to ensure that this
clearance is available.
Size the piping to allow for the maximum
flow rates of the units.
•Insulate the hot water piping to prevent heat loss. Insulate and apply heating materials to the cold
water supply piping to prevent heat loss and freezing of pipes when exposed to excessively cold
temperatures.
37
4.
Before Installation
Check the Gas
•Check that the rating plate indicates the correct type of gas.
Check that the gas supply line is sized
for 236,000 Btuh for this unit.
Check the Power
•The power supply required is 120V AC,
at 60Hz. Using the incorrect voltage
may result in fire or electric shock.
Caution
Do Not Use Equipment for Purposes Other Than Those Specified
•Do not use for purposes other than increasing the temperature of the water supply,
as unexpected accidents may occur as a result.
Check Water Supply Quality
•If the water supply is hard, acidic or otherwise impure, treat the water with approved methods in
order to ensure full warranty coverage.
Use Extreme Caution if Using With A Solar Pre-Heater
•Using this unit with a solar pre-heater can lead to unpredictable output temperatures and
possibly scalding. If absolutely necessary, use mixing valves to ensure output temperatures do
not get to scalding levels. Do not use a solar pre-heater with the quick-connect multi-system.
Checkup
•Check the fixing brackets and vent pipe yearly for damage or wear. Replace if necessary.
5.
Choosing Installation Site
*Locate the appliance in an area where leakage from the unit or connections will not result in damage
to the area adjacent to the appliance or to the lower floors of the structure. When such locations
cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed
under the appliance. The pan must not restrict combustion air flow.
Caution
•Install the water heater in a location where it is free from obstacles and
stagnant air.
•Consult with the customer concerning the location of installation.
•Do not install the water heater near staircases or emergency exits.
•Avoid places where fires are common, such as those where gasoline,
benzene and adhesives are handled, or places in which corrosive
gases (ammonia, chlorine, sulfur, ethylene compounds, acids) are
present.
This may cause incomplete combustion or failures.
38
•Install the exhaust vent so that there are no obstacles around the
termination and so that exhaust can't accumulate. Do not enclose
the termination with corrugated metal or other materials.
•Do not install the water heater where the exhaust will blow on
outer walls or material not resistant to heat. Also consider the
surrounding trees and animals.
The heat and moisture from the water heater may cause discol-
oration of walls and resinous materials, or corrosion of aluminum
materials.
•Do not locate the vent termination directed towards a window
or anything other structure which has glass or wired glass
facing the termination.
•Avoid installation above gas ranges or stoves.
•Avoid installation between the kitchen fan and stove. If oily
fumes or a large amount of steam are present in the installation
location, take measures to prevent the fumes and steam from
entering in the equipment.
•Avoid installation in places where dust or debris will accumulate.
Dust may block the air-supply opening, causing the perfor-
mance of the device fan to drop and incomplete combustion to
occur as a result.
•Install in a location where the exhaust gas flow will not be
affected by fans or range hoods.
•Take care that noise and exhaust gas will not affect neighbors.
•Make sure that the location allows installation of the exhaust
vent as specified.
•Avoid installation in places where special chemical agents
(e.g., hair spray or spray detergent) are used.
Ignition failures and malfunction may occur as a result.
•For outdoor installation, use the VC4 outdoor vent cap. If it is
necessary to vent above the roof line in an outdoor installation,
also use the base of the VC4 vent cap for rain protection.
•Avoid installation where the unit will be exposed to excessive
winds.
•Before installing, make sure that the vent termination (or the vent
cap in an outdoor installation) will have the proper clearances
according to the National Fuel Gas Code (ANSI Z223.1).
39
6.
Installation Clearances
Before installing, check for the following:
Caution
Install in accordance with relevant building and mechanical codes, as well as any local, state
or national regulations.
ItemCheck
•Maintain the following clearance from
both combustible and non-combustible
materials.
Illustration
R
e
q
u
i
r
e
d
C
l
e
a
r
a
n
c
e
s
F
r
o
m
H
e
a
t
e
r
12" Indoor
36" Outdoor
24" Outdoor
4" Indoor
2" Indoor
24" Outdoor
C
o
o
k
i
n
g
E
q
u
i
p
m
e
n
t
• If the unit will be installed in the vicinity of a
permanent kitchen range or stove that has
the possibility of generating steam that
contains fats or oils, use a dividing plate or
other measure to ensure that the unit is not
exposed to air containing such impurities.
* The dividing plate should be of noncombust-
ible material of a width greater than the
water heater.
Exhaust hood
Dividing plate
Water
heater
Range
•If possible, leave 8" or more on either
side of the unit to facilitate inspection.
Min: 3"
S
e
c
u
r
i
n
g
o
f
s
p
a
c
e
f
o
r
r
e
p
a
i
r
/
i
n
s
p
e
c
t
i
o
n
•If possible, leave 24" or more in front of
the unit to facilitate maintenance
and service if necessary.
8" or
more
8" or
more
24" or
more
Min: 3"
(unit: inch)
40
Clearance Requirements from Vent Terminations to Building Openings
*All clearance requirements are in accordance with ANSI Z21.10.3a-2003 and the National Fuel Gas
Code, ANSI Z223.1.
Vent Terminal
Air Supply Inlet
Clearance
A=
B=
C=
D=
E=
F=
G=
H=
I=
J=
K=
L=
M=
Above grade, veranda, porch, deck,
or balcony
Indoor Installation
(See p.42)
12" (12")
Area Where Terminal
is Not Permitted
Outdoor Installation
(See p.42)
12" (12")
4' below or to the side of
Window or door that may be opened
opening, or 1' above opening
12" (36")
(36")
Permanently closed window
**
Vertical clearance to ventilated soffit
located above the terminal within a
**
horizontal distance of 2 feet from the
center of the terminal
Unventilated soffit
*
*
Outside corner
*
*
Inside corner
*
*
Each side of center line extended
3' within a height 15' above
3' within a height 15' above
above meter/regulator assembly
meter/regulator assembly
meter/regulator assembly
Service regulator vent outlet
3'3'
4' below or to the side of
Nonmechanical air supply inlet or
12" (36")
combustion air inlet to any other
opening, or 1' above opening
appliance
(36")
Mechanical air supply inlet
3' above if within 10' (6')
3' above if within 10' (6')
Above paved sidewalk or paved
(7' ***)
(7' ***)
driveway located on public property
Under veranda, porch, deck, or
* (12"- Canada Only****)* (12"- Canada Only****)
balcony
()= indicates clearances required in Canada
*Maintain clearances in accordance with local installation codes and the requirements of the gas supplier
***A vent shall not terminate directly above a sidewalk or paved driveway that is located between two
single family dwellings and serves both dwellings.
****Permitted only if veranda,porch,deck,or balcony is fully open on a minimum of two sides beneath the floor.
41
Clearance Requirements from Vent Terminations to Building Openings
*All clearance requirements are in accordance with ANSI Z21.10.3a-2003 and the National Fuel Gas
Code, ANSI Z223.1.
Maintain the following clearances to any
opening in any building:
Illustration
V
e
n
t
C
l
e
a
r
a
n
c
e
s
W
h
e
n
H
e
a
t
e
r
i
s
I
n
-
s
t
a
l
l
e
d
I
n
d
o
o
r
s
•4' below, 4' horizontally from, or 1' above
any door, operable window, or gravity air
inlet into any building.
3' above any forced air inlet within 10'.
4'
4'
1'
3'
V
e
n
t
C
l
e
a
r
a
n
c
e
s
W
h
e
n
H
e
a
t
e
r
i
s
I
n
-
s
t
a
l
l
e
d
O
u
t
d
o
o
r
s
W
i
t
h
a
V
e
n
t
C
a
p
• 1' below, 1' horizontally from, or 1' above
any door, operable window, or gravity air
inlet into any building.
3' above any forced air inlet within 10'.
1'
1'
1'
3'
(Noritz vent cap)
*For Installations in Canada, clearances are as follows: To windows, doors, & gravity air inlets: 36".
To forced air inlets: 6'. These clearance requirements hold true for all of the above situations: Indoor,
Outdoor w/vent cap, & Recess Box.
42
7.
Installation
Securing to the wall
• The weight of the device will be applied to the wall. If the strength of the wall is not suffi-
cient, reinforcement must be done to prevent the transfer of vibration.
• Do not drop or apply unnecessary force to the device when installing. Internal parts may
be damaged and may become highly dangerous.
• Install the unit on a vertical wall and ensure that it is level.
Item
Check
•When installing with bare hands,
take caution to not inflict injury.
•Be careful not to hit electrical
wiring, gas, or water piping while
drilling holes.
Illustration
Location of Screw Hole
Mounting Bracket
(upper)
Caution
L
o
c
a
t
i
n
g
S
c
r
e
w
H
o
l
e
s
a single screw hole, making sure to hit a stud.
and tighten the screw and hang the unit by
the upper wall mounting bracket.
ine the positions for the remaining four screws
(two for the top bracket and two for the bottom), and
remove the unit.
4. Drill holes for the remaining four screws.
5. Hang the unit again by the first screw, and then
insert and tighten the remaining four screws.
Locating Screw Holes
Tapping Screw
M
o
u
n
t
i
n
g
S
t
r
u
c
t
u
r
e
6. Take waterproofing measures so that water does
not enter the building from screws mounting the
device.
•Make sure the unit is installed securely so that it will
not fall or move due to vibrations or earth-quakes.
43
8.
Vent Pipe Installation
(Indoor Installation Only)
Vent Piping
•Use only listed category III vent materials.
•Follow the vent pipe manufacturer's installation
instructions.
Pipe diameter
No. of Elbows
3
2
1
4"
Max. Straight Vent Length
15'
27'
39'
•The first vertical run from the top of the heater
should be no longer than 3'.
•Make sure vent pipe is gas tight and will not
leak. Use silicon sealant wherever necessary.
•Do not common vent or connect more than
one appliance to this venting system.
• The total vent length including horizontal &
vertical vent runs should be no less than 3'.
•Do not place any dangerous objects at the end
of the exhaust vent.
•Steam (smoke) or water drops may come out
from the end of the exhaust pipe. Select the
location for the end of the vent so that steam is
not visible, and the vent is not wet with drip-
ping water.
•If snow is expected to accumulate, take care
the end of the pipe is not covered with snow or
hit by falling lumps of snow.
•Consult the vent pipe manufacturer's install-
ation instructions for chimney connections.
Appliance Adapters
•Use the following adapters to connect the
unit to the venting system.
Manufacturer and
Product
Protech FasNSeal
HeatFab SafTVent
Z-Flex Z-Vent
Flex-L Star-34
Part No.
FSAA4
9401RYPK
2SVWA04
SRASPSA4
•Make the vertical section of the exhaust vent
as short as possible.
•Maintain the same vent pipe diameter all the
way to the end.
Clearances
Manufacturer andEnclosedUnenclosed
.
10" (sides)
15"(top)
Noritz N-Vent4"3"3"
6"(bottom)
8" (sides)
12"(top)
Protech FasNSeal4"3"3"
4"(bottom)
Protech FasNSeal W26"4"3"3"
HeatFab SafTVent6"6"2"2"
Z-Flex Z-Vent8"4"1"1"
Flex-L StaR-348"4"1"1"
These clearances are subject to change.
Refer to the UL listing for the proper clearances.
Horizontal Vent Termination
Hanger
Straps
Elbow
Slope
Downwards
Termination
3'
Max.
Appliance
Adapter
Wall
Thimble
•Terminate at least 12" above
grade or above snow line.
•Terminate at least 7' above a
public walkway, 6' from the
combustion air intake of any
appliance, and 3' from any
other building opening, gas
utility meter, service regulator
etc.
•Terminate at least 3' above any
forced air inlet within 10', 4'
below, 4' horizontally from and
1' above any door, window, or
gravity air inlet into any building
per National Fuel Gas Code
ANSI Z223.1/NFPA 54.
•Slope the horizontal vent 1/4"
downwards for every 12".
•Use a condensation drain if
necessary.
44
Vertical Vent Termination
Rain
Cap
Roof
Flashing
Firestop/
Support
Elbow
Hanger
Strap
Firestop
3'
Max.
Condensation
Drain (Install
According to
Local Codes)
•Terminate at least 6' from the
combustion air intake of any
appliance, and 3' from any
other building opening, gas
utility meter, service regulator
etc.
•Enclose exterior vent systems
below the roof line to limit
condensation and protect
against mechanical failure.
•When the vent penetrates a
floor or ceiling and is not
running in a fire rated shaft, a
firestop and support is required.
•Terminate the vent system at
least 3' above, but not more
than 6' above the roof line, or
according to the vent pipe
manufacturer's instructions.
•Provide vertical support every
12' or as required by the vent
pipe manufacturer's instructions.
•Slope the horizontal vent 1/4"
downwards for every 12".
•Do not vent straight upwards.
Always have a horizontal section
of venting.
•Install a condensation drain in
the horizontal section of the
venting.
Appliance
Adapter
45
Combustion Air
Supply combustion air to the units as per the National Fuel Gas Code, ANSI Z223.1.
•Provide two permanent openings to allow
circulation of combustion air.
•Make each opening 236 square inches if
they provide indoor air, and 100 square
inches for outdoor air.
•If the unit is installed in a mechanical closet,
provide a 24" clearance in front of the unit to
the door.
•If combustion air will be provided through a
duct, size the duct to provide 86 cubic feet of
fresh air per minute.
12"
20"
20"
12"
Openings supplying indoor air
46
9.
Gas Piping
Follow the instructions from the gas supplier.
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system
during any pressure testing of that system at test pressures in excess of
1
⁄
2
psig (3.5 kPa).
The Appliance must be isolated from the gas supply piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply piping system at test pressures equal to or less than
1
⁄
2
psig (3.5 kPa).
The appliance and its gas connections must be leak tested before placing the appliance in operation.
The inlet gas pressure must be within the range specified. This is for the purposes of input adjustment.
In order to choose the proper size for the gas line, consult local codes or the National Fuel Gas Code ANSI
Z223.1.
Gas Pressure
Size the gas line according to total btuh demand
of the building and length from the meter or
regulator so that the following supply pressures
are available even at maximum demand:
Natural Gas Supply Pressure
Min.5" WC
Max.10.5" WC
LP Gas Supply Pressure
Min.10.5" WC
Max.14" WC
Measuring Gas Pressure
In order to check the gas supply pressure to the unit, a
tap is provided on the gas inlet. Remove the hex head
philips screw from the tap, and connect a manometer
using a silicon tube.
In order to check the gas manifold pressure, a pair of
taps are provided on the gas valve inside the unit.
The pressure can be checked either by removing the hex
head philips screw and connecting a manometer with a
silicon tube, or by removing the 1/8" NPT screw with an
allen wrench and connecting the appropriate pressure
gauge.
Sample Gas Line
Noritz N-084M
(236,000 Btuh)
Outlet E
Gas Meter
Select a gas meter capable of supplying the entire
btuh demand of all gas appliances in the building.
Gas Connection
•Do not use piping with a diameter smaller than
the inlet diameter of the water heater.
•Gas flex lines are not recommended unless they
are rated for 236,000 btuh.
•Install a gas shutoff valve on the supply line.
•Use only approved gas piping materials.
Barbecue
(50,000 Btuh)
Outlet A
10'
Clothes Dryer
(35,000 Btuh)
Outlet C
10'
Section 1
10'
Instructions
1. Size each outlet branch starting from the furthest
using the Btuh required and the length from the
meter.
2. Size each section of the main line using the
length to the furthest outlet and the Btuh
required by everything after that section.
Sample Calculation
Outlet A: 45' (Use 50'), 50,000 Btuh requires 1/2"
Outlet B: 40', 65,000 Btuh requires 1/2"
Section 1: 45' (Use 50'), 115,000 Btuh requires 3/4"
Outlet C: 30', 35,000 Btuh requires 1/2"
Section 2: 45' (Use 50'), 150,000 Btuh requires 3/4"
Outlet D: 25' (Use 30'), 25,000 Btuh requires 1/2"
Section 3: 45' (Use 50'), 175,000 Btuh requires 1"
Outlet E: 25' (Use 30'), 236,000 Btuh requires 1"
Section 4: 45' (Use 50'), 411,000 Btuh requires 1 1/4"
Section 4
5'
Section 3Section 2
5'5'
5'
5'
10'
Outlet D
Outlet B
5'
Gas Range Stove
(65,000 Btuh)
Gas Fireplace
(25,000 Btuh)
Natural Gas
Meter
**See next page for the pipe capacity charts.
47
Gas Line Sizing for a Noritz N-084M
Adapted from UPC 1997
Maximum NaturNatural Gasal Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
3 1/2"
4"
Length in Feet
10'20'30'40'50'60'70'80'90'100'125'
174
56535044
61
66
73
82
96
119
127
138
152
171
200
249
363
222208197174
239
259
286
323
377
470
684
358
404
428
456
490
532
588
663
775
965
1404
536
605
641
734
798
880
993
1445
2103
683
1161
1033
1165
1234
1315
1413
1536
1696
1913
2784
4050
2235
1646
2449
2703
3049
4437
1857
1966
2096
2253
3563
6455
2910
3284
3476
3705
3983
4329
4778
5391
6299
11,412
7843
4261
4808
5090
5425
5831
6338
6995
7893
16,709
11,484
9222
66985936
7091
7557
8123
8830
9745
23,277
15,998
12,847
10,995
Contact the Gas Supplier for Btu/Cubic Ft. of the Supplied Gas. 1000 BTU/Cubic Ft. is a Typical Value
Maximum Liquified PLiquified Petroleumetroleum (Undiluted) Delivery Capacity in Thousands of Btuh (0.5" WC Pressure Drop)
Pipe
Size
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
10'
275
567
1071
2205
3307
6221
20'
189
393
732
1496
2299
4331
30'
152
315
590
1212
1858
3465
40'
129
267
504
1039
1559
2992
50'
114
237
448
913
1417
2646
Length in Feet
60'70'80'
103
8996
217
196185
409
378346
834
724771
1275
1181
1086
23942205
2047
90'
83
173
322
677
1023
1921
100'
78
162
307
630
976
1811
125'
69
146
275
567
866
1606
150'
63
132
252
511
787
1496
200'
55
112
213
440
675
1260
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
Maximum Capacity of Flex TracPipe in Cubic Feet per Hour of Natural Gas
(0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
3/4"
1"
1 1/4"
1 1/2"
2"
10'
206
383
614
1261
2934
20'
147
269
418
888
2078
30'
121
218
334
723
1698
40'
105
188
284
625
1472
50'
94
168
251
559
1317
Length in Feet
60'70'
80
86
141
153
209
227
471
509
11141203
80'
75
132
194
440
1042
90'
71
125
181
415
983
100'
67
118
171
393
933
150'
55
94
137
320
762
200'
48
82
116
277
661
Maximum Capacity of Flex TracPipe in Thousands of Btuh Liquified Petroleum
( 0.5" WC Pressure Drop)
Pipe
Size
3/4"
1"
1 1/4"
1 1/2"
2"
10'
325
605
971
1993
4638
20'
232
425
661
1404
3285
30'
191
344
528
1143
2684
40'
166
297
449
988
2327
50'
149
265
397
884
2082
Length in Feet
60'70'
126
136
222
241
330
359
745
805
17611902
80'
118
208
307
696
1647
90'
112
197
286
656
1554
100'
106
186
270
621
1475
150'
87
143
217
506
1205
200'
76
129
183
438
1045
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
TracPipe® is a registered trademark of Omega Flex.
Maximum Capacity for Gas Flex Connectors in Cubic Feet per Hour of Natural Gas
(0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
1/2"
3/4"
1"
1 1/4"
12"
180
24"
150
290
581
1470
36"
125
255
512
1200
Length in Inches
48"
106
215
442
1130
60"
93
197
397
960
72"
86
173
347
930
Maximum Capacity for Gas Flex Connectors in Thousands of Btuh Liquified Petroleum
( 0.5" WC Pressure Drop)
Pipe
Size
1/2"
3/4"
1"
1 1/4"
12"
288
24"
240
465
930
2352
Length in Inches
36"48"
200
169
409344
825708
19201808
60"
149
315
638
1536
72"
137
278
556
1488
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
48
10.
Water Piping
Ask a qualified plumber to perform the installation
of the plumbing. Observe all applicable codes.
This appliance is suitable for potable water and space heating applications. Do not use this appliance if any part has
been underwater. Immediately call a qualified service technician to inspect the appliance and replace any part of the
control system and gas control which has been under water.
If the water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold
water supply line, means shall be provided to control thermal expansion. Contact the water supplier or a local plumb-
ing inspector on how to control this situation.
A pressure relief valve must be installed near the hot water outlet that is rated in accordance with and complying with
either The Standard for Relief Valves and Automatic Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22, or
The ANSI/ASME Boiler and Pressure Vessel Code, Section IV( Heating Boilers ). This pressure relief valve must
be capable of an hourly Btu rated temperature steam discharge of 236,000 Btuh. Multiple valves may be used. The
pressure relief capacity must not exceed 150 psig. No valve shall be placed between the relief valve and the water
heater. The relief valve must be installed such that the discharge will be conducted to a suitable place for disposal
when relief occurs. No reducing coupling or other restriction may be installed in the discharge line. The discharge line
must be installed to allow complete drainage of both the valve and the line. If this unit is installed with a separate
storage vessel, the separate vessel must have its own temperature and pressure relief valve. This valve must also
comply with The Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI
Z21.22. (in the U.S. only). A temperature relief valve is not required, but if one is used, do not install the valve with the
probe directly in the flow of water. This may cause unwarranted discharge of the valve.
Piping and components connected to the water heater shall be suitable for use with potable water.
Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water.
A water heater used to supply potable water may not be connected to any heating system or components previously
used with a nonpotable water heating appliance.
When water is required in one part of the system at a higher temperature than in the rest of the system, means such
as a mixing valve shall be installed to temper the water to reduce the scald hazard.
•Flush water through the pipe to clean out metal powder, sand and dirt before connecting it.
•Take appropriate heat insulation measures (e.g., wrapping with heat insulation materials, using electric heaters)
according to the climate of the region to prevent the pipe from freezing.
•
Use a union coupling or flexible pipe for connecting the pipes to reduce the force applied to the piping.
•Do not use piping with a diameter smaller than the coupling.
•When feed water pressure is too high, insert a depressurizing valve, or take water hammer prevention measures.
•Avoid using joints as much as possible to keep the piping simple.
•Avoid piping in which an air holdup can occur.
•Use approved piping materials.
•If installing the unit on a roof:
If the unit is installed on a roof to supply water to the levels below, make sure that the water pressure supplied to
the unit does not drop below 29 psi. It may be necessary to install a pump system to ensure that the water pressure
is maintained at this level.
Check the pressure before putting the unit into operation.
Failing to supply the proper pressure to the unit may result in noisy operation, shorter lifetime of the unit, and
may cause the unit to shut down frequently.
Supply water piping
•Do not use PVC piping.
•Mount a check valve and a shut off valve (near
the inlet).
•In order for the client to use the water heater
comfortably, 98.1 to 491 kPa (14 to 70 PSI) of
pressure is needed from the water supply.
Be sure to check the water pressure. If the water
pressure is low, the water heater cannot perform
to its full capability, and may become a source of
trouble for the client.
Hot water piping
•Do not use lead or PVC piping.
•The longer the piping, the greater the heat loss.
Try to make the piping as short as possible.
•Use mixing valve with a low water resistance.
Use shower heads with low pressure loss.
•If necessary, use a pump or other means to en-
sure that the supply water pressure to the inlet
of the heater does not fall below 29 PSI when
the maximum amount of water is being de-
manded. Also install a pressure meter on the in-
let. If this is not done, local boiling will occur in-
Drain piping
side the water heater causing abnormal sounds
•Expansion water may drop from the pressure
and decreasing the durability of the heat ex-
prevention device and wet the floor. If neces-
changer.
sary, provide drain piping or use a drain hose to
remove the water.
49
11.
Plumbing Applications
Recirculation System
Cold Water Supply
Hot Water Return
Aquastat Wiring
Use Honeywell Aquastat
(Model L6006A or L6006C)
Fixtures
Check
Valve
Expansion Tank
(Install According
to Local Codes)
105
Pump
NORITZ
N-084M
(Relay for
Pump
> 85 W)
(See p. 54)
Pump Control Signal
(See p. 54)
R
AC120
Check Valve
B
5
W
Neutral
Ground
Live
Pressure
Relief
Valve
Shutoff Valve
Drain
Hot Water
Pump
Aquastat
(See notes for Sizing)
(Use Aquastat if Unit
Isn't Controlling Pump)
8-10 Gal.
Storage Tank
(To Alleviate Cold
Water Sandwich)
* Size the pump to provide at least 2 GPM through the system at 10 Ft of Head plus
piping losses. Check the maintenance monitors on the unit to make sure the pump
is providing that much flow.
** Make sure that the flow rate is not greater than 4 ft/sec. (3/4”: 5 GPM, 1 1/4”: 13 GPM)
Heating System
Cold Water Supply
Backflow
Preventer
(Optional)
Pressure
Reducing
Valve
(Optional)
(Relay for
Pump
> 85 W)
(See p. 54)
Hot Water Return
NORITZ
N-084M
Check
Valve
Pump
(See notes for Sizing)
Pump Control signal
(See p. 54)
Check Valve
Air Scoop
(Optional)
Pressure
Relief Valve
Shutoff Valve
Aquastat
Heating
Controls
(Use Aquastat if
Unit Isn't Controlling
Pump)
Temp. &
Expansion
Press. Gauge
Tank
(Optional)
(Install According
to Local Codes)
Hydronic Heat
Exchanger or
Radiant Heat
Piping
Drain
Shutoff
Valve
For Baseboard
Applications:
Please contact
Noritz for
compatibility.
Hot Water
Boiler Drain Valve
* Size the pump to provide at least 2 GPM through the system at 10 Ft of Head plus
piping losses. Check the maintenance monitors on the unit to make sure the pump
is providing that much flow.
** Make sure that the flow rate is not greater than 4 ft/sec. (3/4”: 5 GPM, 1 1/4”: 13 GPM)
For Space Heating Purposes:
N-084M
Cold Water Supply
Tempered Potable Hot Water
Mixing Valve
Hot Water for Heating
If the system requires water
for space heating at a higher
temperature than for other
uses, means such as a mixing
valve shall be provided to
temper the water for the other
uses to help prevent scalding.
50
12.
Electrical Wiring
Consult qualified electrician
for the electrical work.
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This appliance must be electrically grounded in accordance with local codes, or in the absence of local codes,
with the National Electrical Code, ANSI/NFPA 70. In Canada, the latest CSA C22.1 Electrical Code.
Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper
and dangerous operation.
Verify proper operation after servicing.
Field wiring to be performed at time of appliance installation.
Caution
Do not turn on the power until the electrical wiring is finished.
This may cause electrical shock or damage to the equipment to occur.
•Do not let the power cord contact the gas piping.
Tie the redundant power cord outside the
water heater. Putting the redundant lengthof
cord inside the water heater may cause elec-
trical interference and faulty operation.
•The electrical supply required by the water
heater is 120V AC at 60 Hz.
The power consumption may be up to 135W or
higher if using optional accessories.
Use an appropriate circuit.
•Do not disconnect the power supply when not
in use. When the power is off, the freeze
prevention in the water heater will not acti-
vate, resulting in possible freezing damage.
Ground
•To prevent electrical shock, provide a ground
with resistance less than 100 . An electrician
should do this work.
•A grounding screw is provided on the back of
the junction box lid.
Do not connect the ground to the city water
or gas piping. Do not tie the ground to a tele-
phone line.
Breaker Installation
•Mount a device which shuts off the electrical
path automatically (leakage breaker) when
electrical leakage is detected.
Junction Box
Junction Box Lid
(back)
Ground
Power Cord
Terminal
Block
w the junction box lid and open.
the power cord through the bottom of the unit.
t the live and neutral wires to the black and
white wire in the junction box.
the ground wire to the ground screw on the
back of the junction box lid and close junction box.
51
Remote Controller
• Applicable Model
N-084M
Remote controller
RC-7646M-2
Install the remote controller according to the instructions in the Installation Guide (p. 62).
•The N-084M can be programmed so that it will default to one of four temperatures if the remote
controller is removed (180, 140, 130, 120°F). To change the default temperature, the remote control-
ler must be initially installed, and removed after programming.
*Changing the default temperature setting:
the first ten minutes of connecting electrical power to the unit, but before pressing the
Power On/Off button, hit the up [] or down [] button on the remote controller. This will put
the unit into maintenance writer mode. If pressing either of these buttons does not put the unit
into maintenance writer mode, unplug the unit for sixty seconds and try again.
maintenance monitor item number will flash on the display. (the initial item number will be “99”).
up [] and down [] buttons can be used to change the maintenance writer item number.
a temperature from the chart below and set the 14 and 15 maintenance writers according to
the chart. Pressing the Flow Meter Alarm Set button for 0.5 seconds will switch the indicated item
number from “OFF” to “ON” or “ON” to “OFF”. If the Priority lamp is flashing when an item number
is displayed, this indicates an “ON” setting for that item number, and if the Priority lamp is off, the
item number is off.
*Do not change the other item numbers. This may cause a fault in the water heater.
setting the 14 and 15 item numbers for the desired temperature, press and hold the up []
and down [] buttons together for five seconds to confirm the new settings. The remote control-
ler will emit a tone when the settings are confirmed. If this is not done, the unit will not put the
setting changes into effect. After confirming the setting, remove the remote controller to initiate
the default temperature setting.
Note:The setting changes can be cancelled by pressing the Power On/Off button before confirming the
settings, or if the unit is left alone for ten minutes without confirming the settings. If the default
setting needs to be changed again, disconnect the electrical power to the unit, reconnect it and
follow this procedure again.
Item No.
Temp.
180°F
140°F
130°F
120°F*
14
ON
OFF
ON
OFF
15
ON
ON
OFF
OFF
*Factory Default Setting
52
Connecting Remote Controller Cord to Unit
•
•
•
•
Keep the remote controller cord away from the freeze prevention heaters in the unit.
Tie the redundant cord outside the water heater. Do not put the extra length inside the equipment.
The remote controller cord can be extended up to 300' with 18AWG wire.
Use a Y type terminal with a resin sleeve. (Without the sleeve, the copper wire may corrode and
cause problems).
•Be sure to hand tighten when screwing to the terminal block. Power tools may cause damage to the
terminal block.
Remote controller cord
• For extensions, a 26' cord can be purchased (Part # RC-CORD26) or use 18AWG wire.
• Install according to the National Electrical Code and all applicable local codes.
1. Leave enough slack so that the remote controller
cord will not be damaged if the unit is removed
from the wall.
the front cover of the heater (4 screws).
the remote controller cord through the wiring
throughway and into the unit.
t the Y terminals at the end of the remote
controller cord to the terminal block.
the remote controller cord with a clamp.
e the front cover.
Clamp
Wiring
Throughway
Terminal Block
18AWG Wire
53
Pump Wiring
Connecting the pump control wire
enough slack so that the pump control
wires will stay connected if the unit is removed
from the wall.
the front cover of the heater (4 screws).
off the connector at the end of the pump
control wires.
4. Wire the pump control wires through the wiring
throughway and connect them to the wiring inside
the pump (this will be the power supply for the pump,
do not also connect 120 V to the pump).
If a large pump is being used (greater than 85W)
use the voltage from these wires as the signal to
close a normally open relay through which 120 V will
be supplied directly from a wall circuit to the pump.
5. Replace the front cover.
*This feature is not available when using
the Quick Connect Multi System feature.
PUMP
Pump Control
Wire Tag
Crimping Terminal
Wiring
Throughway
Supplies Power for
Circulating Pump
(Use a Relay for
Larger Pumps)
Relay connection with larger pumps (>85 W)
and prepare the pump control wires as described above.
a suitable installation location for the relay where it will be protected from moisture.
t the pump control wires from the heater to the signal input on the relay.
one of the electrical supply leads and wire it across the open terminals of the relay.
all connections and replace the front cover of the heater.
AC120V
Connect to Pump Control
Wires in Unit
1
0
4
2
Relay (ex. Omron G7L2ABUBJCBAC120)
Circulation Pump
54
13.
Maintenance
Periodically check the following to ensure proper
operation of the water heater.
•The venting system must be examined periodically by a qualified service technician to check for
any leaks or corrosion.
•The burner flame must be checked periodically for a proper blue color and consistency.
•If the flame does not appear normal, the burner may need to be cleaned.
•If the burner needs to be cleaned, it must be performed by a qualified service technician.
•Do not obstruct the flow of combustion and ventilation air.
•The pressure relief valve must be operated once a year to ensure that it is functioning properly
and there is no obstruction. Turn the power off to the unit before opening the relief valve, and
make sure that water draining out of the valve will not cause any damage.
•If the relief valve discharges periodically, it may be due to thermal expansion in a closed water
system. Contact the water supplier or a local plumbing inspector on how to correct this situation.
Do not plug the relief valve.
•See Operation Manual for further maintenance.
Warning:There is a scald potential if the output temperature is set too high.
Should overheating occur, or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.
Do not use this appliance if any part has been under water. Immediately call a qualified service
technician to inspect the appliance and to replace any part of the control system and any gas control
which has been under water.
Periodically check and clean the filter inside the cold water inlet of the unit.
14.
Trial Operation
The installer should test operate the unit, explain to
the customer how to use the unit, and give the owner
this manual before leaving the installation
•Preparation
...........
(1)Open a hot water fixture to confirm that water is available, and then close
the fixture.
(2) Open the gas supply valve, turn on the power supply, and press the Power
On/Off button on the remote controller (the Operation lamp will turn on).
(1)Open a hot water fixture and confirm that the Burner On lamp comes on, and that hot water is
being produced. (If necessary, repeat until the air in the gas piping is bled out).
*White smoke may be noticed from the exhaust vent during cold weather. However, this is not a
malfunction of the unit.
*If an “11” error code appears on the remote controller, turn the unit off and then back on again,
and then open a hot water fixture again.
(2)Change the temperature setting on the remote controller and check that the water temperature changes.
•If the water heater does not operate normally, refer to “Troubleshooting” in the Operation Manual.
*After the trial operation, clean the filter in the cold water inlet.
• Turn the system power on with the remote controller.
•Slowly open a hot water fixture and check that the units ignite sequentially. Check to see that the
hot water temperature is the same as the temperature displayed on the remote controller. (*1)
*If both units do not ignite, switch which unit will ignite first by pressing the Max. or Min. Mani-
fold Pressure Set Button on the circuit board (see p. 57). (*2)
Unit A Ignites
Unit B Doesn't Ignite
Press Max. or Min. Manifold
Pressure Set Button on Unit B
Unit A Doesn't Ignite
Unit B Ignites
*If an 11 or F11 error code flashes on the remote controller, hit the Power Button on the remote
controller off and on 2-3 times.
*If (*1) and (*2) cannot be done, the Quick Connect Cord may not be properly connected.
Check that the cord is properly connected.
55
Caution
Handling after trial operation
•If the unit will not be used immediately, close off all gas and water shutoff valves, drain all of
the water out of the unit and the plumbing system to prevent the unit and system from
freezing, and bleed the gas out of the gas line.
Freezing is not covered by the warranty.
Lighting Instructions
This water heater does not have a pilot. It is equipped with an ignition device that automatically lights
the burner.
Do not try to light the burner by hand.
the safety information in the installation manual or on the front of the water heater.
off all electrical power to the unit.
not attempt to light the burner by hand.
the gas control manual valve (external to the unit) clockwise to the off position.
five minutes to clear out any gas. If the smell of gas remains, stop, and follow the instructions
on page 3 of this manual.
the gas control manual valve counterclockwise to the on position.
on electric power to the unit.
unit will now operate whenever hot water is called for. If the unit will not operate, follow the
shutdown instructions and call a service technician.
Shutdown Instructions
any water demand.
off electric power.
the gas control manual valve clockwise to the off position.
Should overheating occur, or the gas supply fail to shut off, turn off the manual control valve to the appliance.
15.
Dimensions
N-084M
3.5"
2.4"
2
.
8
"
(VIEW FROM TOP)
14.2"
11"
9.6"
7"
GAS INLET (3/4")
3
.
4
"
6
.
8
"
5
.
5
"
6
.
9
"
17.7"
COLD WATER INLET (3/4")
HOT WATER OUTLET (3/4")
WIRING THROUGHWAYS
6.7"
5.5"
3.9"
2.8"
1.4"
UPPER WALL MOUNT BRACKETS
18.3"
0.4"9.4"
3.7"
1
.
6
"
17.7"
4"
2
.
8
"
LED
2
6
.
2
"
2
4
.
2
"
AIR INLET
LOWER WALL MOUNT BRACKETS
3.9"
5.5"
6.7"
WIRING THROUGHWAYS
HOT WATER OUTLET
WATER DRAIN VALVES
WATER DRAIN VALVES
56
2
"
2
.
2
"
COLD WATER INLET
GAS INLET
1.4"
2.8"
0.4"
1
.
7
"
WIRING DIAGRAM (MODEL : N-084M)
HEAT EXCHANGER
FLOW CONTROL
VALVE
THERMAL FUSE
THERMAL FUSE
BYPASS FLOW
BURNER THRMISTOR
N-084M(-DV)(-CA) Model Only
(OPTIONAL)
SYSTEM CONTROLLER
SC-101-3M-B
SC-101-6M-B
(OPTIONAL)
SYSTEM CONTROLLER
SC-201-6M
HEAT EXCHANGER
FLOW SENSOR
BYPASS FLOW
SENSOR
AIR INLET
WATER INLET
HEAT EXCHANGER
Manifold Gas Pressure
Increase Button
Manifold Gas Pressure
Decrease Button
Minimum Manifold Pressure Set Button
Maximum Manifold Pressure Set Button
BURNING LED GAS VALVE UNIT WATER OUTLET FROST SENSING 0 DISCONNECT FOR SYSTEM CONTROLLER REMOTE CONTROLLER RC-7646M-2, RC-7647M TRANSFORMER CURRENT LEAKAGE SAFETY DEVICE (GFCI) FLAME ROD FAN MOTOR FM ELECTRODE HIGH-LIMIT SWITCH N-084M(-DV)(-CA) Model Only COLOR CODING W : White R : Red BK : Black V : Violet O : Orange BL : Blue GY : Gray G : Green BR : Brown Y : Yellow CCP VALVE (OPTIONAL) Only necessary if SC-101-3M-B or SC-101-6M-B system controllers are being used P CIRCULATION PUMP ANTI-FROST HEATER 57 Connecting Quick Connect Cord For Quick Connect Multi System Installation use a Quick Connect Cord (Sold Separately). Caution The wire coloring on the Quick Connect Cord will not be the same as the wire coloring from the connection plug inside the unit. *The remote controller can be connected to either unit A or B. Quick Connect Cord AB "Quick Connect Cord" tag Instruction for connecting the Quick Connect Cord to each unit: off the power. the front cover of the heater (4 screws). the Quick Connect Cord through the wiring throughway and into the unit. 4. Plug the connector on the Quick Connect Cord to the receptacle inside the unit. 5. Attach the ground wire of the Quick Connect Cord to the terminal block fixing plate. (If the ground wire is not attached, electrical noise may cause problems) the coupling cord with a clamp. e the front cover. Ground wire Connector Clamp Junction Box Wiring Throughway Coupling Cord 16. Multi-System A. Installation without a recirculation system Unit No.1 Unit No.6 Unit No.2 Install one system controller (SC-201-6M) for every six units. System Controller Disconnect this Connector * Disconnect this connector on units 2-6 also System Select Connector * Do not connect to the connector. Remote Controller Gas pipe Hot Water Pipe (1 1/4"-2") G Cold Water Supply Pipe (1 1/4"-2") •Insulate or apply heating materials to both the cold water supply piping and the hot water piping to prevent freezing during cold weather and to prevent heat loss through the piping. 58 S y s t e m C o n t r o l l e r U n i t 2 U n i t 1 U n i t 6 D i s c o n n e c t t h i s C o n n e c t o r * A l s o d i s c o n n e c t t h i s c o n n e c t o r o n u n i t s 2 - 6 S y s t e m s e l e c t c o n n e c t o r C o n n e c t t o t h e " R e c i r c u l a t i o n S y s t e m " c o n n e c t o r . R e m o t e C o n t r o l l e r P u m p C o n n e c t i o n W i r e ( f o r p u m p s > 8 5 W , u s e a n e x t e r n a l r e l a y ) W h e n i n s t a l l i n g 2 p u m p s i n p a r a l l e l * S e t d i p s w i t c h 3 t o " O F F " . ( S e e S C - 2 0 1 - 6 M I n s t a l l a t i o n M a n u a l p a g e 1 3 ) G E x p a n s i o n T a n k G a s P i p e W a t e r s u p p l y ( 1 1 / 4 " - 2 " ) B-1. Example of Recirculation with a Multi-System H o t W a t e r ( 1 1 / 4 " - 2 " ) C i r c u l a t i o n P u m p 1 a l l o w f o r m a x i m u m f l o w r a t e s o f t h e u n i t s . C i r c u l a t i o n P u m p 2 ( I f N e c e s s a r y ) H o t W a t e r R e t u r n L i n e ( 3 / 4 " - 1 1 / 4 " ) * S i z e t h e w a t e r s u p p l y p i p i n g t o * S i z e t h e p u m p t o p r o v i d e a t l e a s t 2 G P M @ 1 0 f e e t o f h e a d + p i p i n g l o s s e s t h r o u g h t h e s y s t e m . C h e c k t h e m a i n t e n a n c e m o n i t o r s o n t h e u n i t t o m a k e s u r e t h e p u m p i s p r o v i d i n g a d e q u a t e f l o w . This system will make hot water more quickly available to remote fixtures. The pump will circulate water through the loop until the entire loop is warm, and then the system controller will turn off the pump until the loop cools down. H o t W a t e r S u p p l y • M a k e s u r e t h a t t h e f l o w r a t e i s n o t g r e a t e r t h a n 4 f t . / s e c . ( 3 / 4 ” : 5 G P M , 1 1 / 4 ” : 1 3 G P M ) I f t h e f l o w i s t o o l o w , t h e r e c i r c u l a t i o n l o o p t e m p e r a t u r e w i l l n o t b e w a r m e n o u g h , i f t h e f l o w i s t o o h i g h , t h e l i f e t i m e o f t h e u n i t w i l l b e r e d u c e d . * I f t h e r e a r e m u l t i p l e c i r c u l a t i o n l o o p s , t r y t o m a k e t h e f l o w r a t e . 7 5 - 1 . 2 5 G P M i n e a c h l o o p . * U s e c o p p e r o r s t a i n l e s s w a t e r p i p i n g f o r t h e e n t i r e s y s t e m . 59 60 S y s t e m C o n t r o l l e r U n i t 1 T h e s y s t e m c o n t r o l l e r w i l l s t o p t h e u n i t s f r o m h e a t i n g w h e n t h e t a n k i s u p t o t e m p e r a t u r e , a n d t h e u n i t w i l l c u t t h e f l o w t h r o u g h i t t o 1 . 3 G P M . I n s t a l l t h e p l u m b i n g s o t h a t a c h a n g e i n f l o w w i l l n o t d a m a g e t h e p u m p . W h e n i n s t a l l i n g 2 p u m p s i n p a r a l l e l * S e t d i p s w i t c h 3 t o O F F . ( S e e S C - 2 0 1 - 6 M I n s t a l l a t i o n M a n u a l p a g e 1 3 ) * I f t h e t a n k t h e r m o s t a t w i l l c o n t r o l t h e p u m p s e t d i p s w i t c h 2 t o O F F . ( S e e S C - 2 0 1 - 6 M I n s t a l l a t i o n M a n u a l ) D o n o t c o n n e c t m o r e t h a n o n e p u m p t o t h e t a n k t h e r m o s t a t . U n i t 6 U n i t 2 D i s c o n n e c t t h i s C o n n e c t o r * A l s o d i s c o n n e c t t h i s c o n n e c t o r o n u n i t s 2 - 6 S y s t e m s e l e c t c o n n e c t o r C o n n e c t t o t h e “ S t o - r a g e s y s t e m ” c o n n e c t o r " T h e r m o s t a t R e m o t e C o n t r o l l e r R e l i e f V a l v e O p t i o n 2 - U n i t C o n t r o l O p t i o n 1 - T a n k T h e r m o s t a t C o n t r o l H o t w a t e r s u p p l y l i n e ( C o p p e r o r S t a i n l e s s P i p e ) P u m p C o n t r o l W i r e s ( u s e e x t e r n a l r e l a y ) G a s P i p e S t o r a g e T a n k C i r c u l a t i o n P u m p 2 ( i f N e c e s s a r y ) S t o r a g e t a n k r e t u r n l i n e G H o t W a t e r S t o r a g e T a n k ( 1 1 / 4 " - 2 " ) R e t u r n l i n e c i r c u l a t i o n p u m p ( C o p p e r o r S t a i n l e s s P i p e ) S t o r a g e T a n k C i r c u l a t i o n P u m p 1 H o t W a t e r S u p p l y H o t w a t e r r e t u r n l i n e ( C o p p e r o r S t a i n l e s s P i p e ) S t o r a g e t a n k s u p p l y l i n e ( 1 1 / 4 " - 2 " ) C o l d W a t e r S u p p l y * S i z e t h e w a t e r s u p p l y p i p i n g t o a l l o w f o r m a x i m u m f l o w r a t e s o f t h e b u i l d i n g . B-2. Example of Installation with a Storage Tank and Recirculation System The pump will push water through the Multi-System to heat up the tank. When the return temperature is high, the flow within the device will be limited to 1.3 GPM*. ( C o p p e r o r S t a i n l e s s P i p e ) * F o r t h e s e t t e m p e r a t u r e o f t h e r e m o t e c o n t r o l , u s e t h e t e m p e r a t u r e ( o f t h e t h e r m o s t a t ) + a b o u t 9 ° F . * T o a c h i e v e t h e h i g h e s t r e c o v e r y , s i z e t h e s t o r a g e t a n k c i r c u l a t i o n p u m p f o r m a x i m u m c a p a c i t y . ( N - 1 3 2 M : 1 2 G P M ( e a c h ) @ 5 0 f t . o f h e a d ( 1 6 0 ° F s e t t i n g o r l e s s ) , N - 0 8 4 M : 7 . 4 G P M ( e a c h ) @ 4 0 f t . o f h e a d ( 1 6 0 ° F s e t t i n g o r l e s s ) + p i p i n g l o s s e s t h r o u g h t h e s y s t e m ) . V e r i f y t h e s u p p l y p r e s s u r e t o t h e u n i t s i s a t l e a s t 3 0 P S I . Multi-System Wiring (Use SC-201-6M) Unit 1 System Controller * Connect these to the remote control terminal block in each unit No.6 No.5 No.4 Disconnect this Connector Disconnect for system controller No.3 No.2 9090 B5B5 89 102 Power PCB PCB DPSW 12345678 Remote control terminal block Remote Controller Cord Remote Controller System select connectors Unit 2 Disconnect this Connector Remote Control terminal block D is c o n n e c t f o r s y s t e m c o n t r o ll e r PCB * The remote controller terminal location may differ depending on the unit. Power PCB Remote Controller Cord Units 3-6 Disconnect this Connector Remote control terminal block D is c o n n e c t f o r s y s t e m c o n t r o ll e r PCB Power PCB Remote Controller Cord * The connector location may be slightly different on the actual circuit boards than in these illustrations. 61 For Installers: Remote Controller RC-7646M-2 Read this installation guide carefully before carrying out installation. Installation Guide Note NORITZ AMERICA CORPORATION Do not connect power to the water heater before the remote controller has been properly installed. Included Parts List Part Name Remote Controller Wall Packing Phillips Roundhead Wood Screw Wall Anchor Quantity 1 1 2 2 Wall Packing Connecting Wire Phillips Roundhead Wood Screw Wall Anchor Do not disassemble the remote controller. Remote Controller Notes on the Installation Location •The remote should be installed in an easily accessible location. •Avoid installing in a place where water may splash on the controller. •Avoid locations where special chemical agents (e.g., benzene, fatty and oily deter- gents) are used. •Avoid outdoor installation, or installation in an indoor location where it will be exposed to direct sunlight. Connection of Remote Controller Cord White Connector Y-shaped terminals (two-core) To Remote controller To Water heater *Confirm the connection with the labels at both ends of the remote controller cord. •A 26' cord can be purchased separately (Part # RC-CORD26). •The remote controller cord can be ex- tended up to 300 ft. by splicing the cord and using 18 gauge wire to extend the cord to the appropriate length. 62 Installation Wall Packing to the rear side of the remote controller. t the remote controller wires to the separate remote controller cord. 3. Remove the cover of the remote control, mark the location of the screw holes, and drill holes for the wall anchors. 4. Insert the wall anchors, screw the remote control to the wall and replace the cover. Remote Control Wires Wall Packing (take off the paper) Remote Controller Cord Rear Side of Remote Controller Wall Anchor Phillips Roundhead Wood Screw 63 Installing the Remote Controller Outdoor Junction Box the remote controller wires through the wall pipe and secure the wall pipe to the remote controller. Locate the remote controller wall packing, slide it over the pipe and wires, and apply it to the rear side of the remote. Rear side of remote controller the box nut over the remote controller wires and screw it onto the wall pipe. Wall Pipe Box Nut Remote Controller Wires Wall Packing Secure the wall pipe firmly into the remote controller. Take off the paper. 2. Drill a 1-1/4" hole in the wall where the remote controller will be installed. * Do not install the remote controller in a location that is exposed to moisture, direct sunlight, or chemical agents. These can damage the remote controller. t the remote controller wires to the separate remote controller cord inside the box. Wind the excess remote controller wire on the provided hooks as illustrated below. (Wind the excess wire here.) Remote Controller Wires 3. Insert the wall pipe containing the remote controller wires through the hole. 4. Slide the junction box packing and the junction box over the remote controller wires and wall pipe protruding from the outside wall. Wall packing Wall pipe Take out the pipe about 3/4" from the wall. Junction Box Box Nut Remote Controller Wires Take off the paper. Junction Box Packing Junction Box Remote Controller Cord Tie the redundant length of the remote controller cord outside the junction box. the junction box. 64 65 66 67
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