Noritz N-132M-ASME Installation Manual
Owner’s Guide and
Installation Manual
Model N-132M-ASME
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.
Thank you for purchasing this Noritz Gas Water Heater. Before using, please:
Read this manual completely for correct installation and operation instructions.
CERTIFIED
SAR8464-1
Rev. 1/06
R
Low NOx
Approved by
SCAQMD
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
*SAR8464 T*
Contents
Contents ........................................................................................................ 2
Owner's Guide
Important Safety Information.......................................................................3
General Parts
Main Unit....................................................................................................8
Remote Controller .................................................................................... 9
Initial Operation ........................................................................................... 11
Setting and Using the Water Heater...........................................................12
Flow Meter Alarm......................................................................................... 14
Muting the Remote Controller .................................................................... 16
Preventing Damage from Freezing ............................................................ 17
Regular Maintenance...................................................................................19
Troubleshooting .......................................................................................... 21
Follow-up Service ........................................................................................ 25
Specifications .............................................................................................. 26
External Outfitting ....................................................................................... 27
Combustion Unit and Gas Route ............................................................... 29
Hot-Water Feed Route ................................................................................. 31
Electronic Control Unit................................................................................35
Electronic Control Unit, Remote Controller and Attached Set................ 36
Installation Manual ...................................................................................... 37
10. Water Piping........................................................................................... 51
11. Plumbing Applications.......................................................................... 52
12. Electrical Wiring .................................................................................... 53
13. Maintenance........................................................................................... 57
14. Trial Operation ....................................................................................... 57
15. Dimensions and Wiring Diagram ......................................................... 58
16. Multi-System .......................................................................................... 60
Remote Controller Installation Guide ........................................................ 64
2
1. Included Accessories............................................................................38
2. Optional Accessories............................................................................ 38
3. Quick Connect Multi System Installation ............................................39
4. Before Installation ................................................................................. 40
5. Choosing Installation Site .................................................................... 40
6. Installation Clearances ......................................................................... 42
7. Installation..............................................................................................45
8. Vent Pipe Installation ............................................................................ 46
9. Gas Piping.............................................................................................. 49
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
Warning
Caution
Remarks
Other icons
Electric
Shock.
Prohibited
If you detect a gas leak:
1. Do not try to light any appliance
2. Do not touch any electrical
switch; do not use any phone in
your building.
3. Immediately call your gas
supplier from a neighbor’s phone.
Follow the gas supplier’s
instructions.
4. If you cannot reach your gas
supplier, call the fire department.
Denotes content that may result in instantaneous fire, serious injury
and even death when ignored.
Denotes content that may result in fire, serious injury and even
death when ignored.
Denotes content that may result in bodily injury and physical
damage when ignored.
The content following this icon is necessary to understand for safe
and easy use of this water heater.
High
Temperature.
No flame.
Be sure
to do.
Don’t
touch.
Danger
Ground.
Don’t
disassemble
the equipment.
Do not use the water heater if
the exhaust pipe is displaced, has
holes, or is corroded.
Don’t touch
with a wet
hand.
3
Important Safety Information-2
Warning
If you detect abnormal combustion
or abnormal odors, or during an
earthquake, tornado or fire:
1. Turn off the hot water supply
2. Turn off the power to the water
heater
3. Turn off gas and water at the
main
4. Consult the nearest Noritz agent
Check the temperature of the
running hot water before
entering the shower.
Check the temperature before
stepping into the bath tub.
Be sure the gas/power supplied
matches the gas on the rating
plate.
For Natural Gas
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to
bathe unsupervised.
4
Do not turn off the water heater or
change the water temperature while
someone is using.
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.
Contact Noritz before using with
a solar pre-heater.
Warning
Do not place combustibles such as
laundry, newspapers, oils etc. near
the heater or the exhaust vent
terminal.
Exhaust vent
terminal (indoor
installation)
Unit
Do not use combustible chemicals
such as oil, gasoline, benzene etc.
in the vicinity of the heater or the
exhaust vent terminal.
[When installing indoors]
Check the air supply
vent for dust or
obstructions.
Leave the proper clearance between
the water heater and nearby objects
(trees, timber, boxes with flammable
materials etc.).
Min. 3" from
vent pipe
Left side:
Min. 2"
Front:
Sug. 24"
*
Indicates suggested clearances for
*
maintenance.
Right side:
Min. 2"
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.
Keep power cord free of dust.
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.
Do not touch the exhaust vent pipe
during or immediately after
operation of the water heater.
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.
6
Remark
Do not drink water that has been inside the
unit for an extended period of time. Do not
drink the first use of hot water from the
unit in the morning.
Clean the filter on the water inlet as
frequently as required by the quality of
your local water.
Keep the area around the unit clean.
If boxes, weeds, cobwebs, cockroaches etc. are in
the vicinity of the unit, damage or fire can result.
Do not install the equipment where the
exhaust will blow on walls or windows.
Treat hard, acidic or otherwise impure
supply water with approved methods to
ensure full warranty coverage.
Problems resulting from scale formation
are not covered by the warranty.
This unit is only approved for installation
up to 4500 ft. above sea level.
For installations at higher elevations, contact Noritz
America for Instructions.
Do not disassemble the remote controller.
Do not use benzene, oil or fat detergents
to clean the remote controller.
This may cause deformation.
Do not get the remote controller wet.
Although it is water resistant, too much water can
cause damage.
Do not splash water on the remote
controller. Do not expose the remote
controller to steam.
Do not locate the remote controller near stoves or
ovens, this may cause damage or failure.
Preventing damage from freezing ( p.17)
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.
Check ignition during use and extinction
after use.
Do not use parts other than those specified
for this equipment.
Take necessary measures to prevent
freezing of water and leakage of gas when
leaving the unit unused for long periods of
time. ( p.18)
If it is snowing, check the air inlet, exhaust
gas vent and exhaust vent terminal for
blockage.
7
General Parts
Main Unit
Indoor/Outdoor Wall Mounted, Power Vented Model
Flue Collar
Front Cover
Air Inlet
Water Filter
(Inside Water Inlet)
( p.20)
Pressure Relief Valve
Water Supply Valve
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
( next page)
Setting Buttons
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
When this indicator
is lit, the hot water
temperature can be
set. ( p.13)
Temperature Setting
(Ex.: 110°F)
Flow Meter Setting
The display will flash
after hitting the flow
meter alarm set button.
( p.15)
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.
Open the water supply valve.
1
CLOSED
Open a hot water fixture to confirm that
water is available, and then close the
2
fixture again.
Hot water fixture
OPEN
Open the gas supply valve.
3
Turn on the power.
4
11
How to Use
Setting and Using the Water Heater
(Starting with the Power Off)
2
Press the Power
On/Off Button.
1
1
The temperature will be
displayed on the remote
control thermostat.
On
On
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.
Previous set
temperature
(Ex.: 110°F)
Remote Controller Display
Flashes for 10 sec
12
Set temperature.
Always check the
2
temperature setting
(
before use.
Hot
Cold
)
Turn on hot
water.
3
Turn off the hot
water.
4
Check the indicator lights.
Water temperature
The temperature settings below are examples. The temperature setting
:
(°F
necessary depends on the usage, the length of piping and the time of year.
100 105 110 115 120 125 130 135 140 145 150 160 170 180
Washing
dishes, etc.
* 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.64).
* Consult local codes for minimum operating temperatures.
Shower, hot water
supply, etc.
High temperature
*Initial factory setting is 110°F
On
Off
)
If fixtures incorporate mixing
valves, set the temperature
higher than usual.
13
How to Use
Flow Meter Alarm
2,3
1
3
(Starting with the power off)
Preparation
1. Plug the bath drain.
Press the Power
On/Off Button
1
On
The temperature will be displayed
on the remote control thermostat.
On
Previous set temperature
(example:110°F)
Set temperature.
Always check
2
temperature setting
(
before use.
Hot
Cold
Check the indicator lights.
Water temperature
)
14
An alarm will sound for ten
seconds when the flow
reaches the set level.
Water Temperature
The temperatures settings below are only examples. The
:
temperature setting necessary will depend on the usage,
(°F
the length of piping and the time of year.
100 105 110 115 120
)
The water will continue to run unless it is
manually turned off.
To set the flow meter alarm:
Adjust flow meter
3
alarm setting.
Press the flow meter alarm set button
(the setting will flash on the display)
and adjust with the setting buttons.
Increase
Decrease
Choose the flow meter alarm setting
from the following options: 10 - 60
(In 5 gallon intervals), 70 - 100 (In
10 gallon intervals), or 990 gallons.
The alarm will not sound if
Note:
it is set for 990 gal.
4
Turn on hot
water.
On
Warmer HotWarm
* Initial factory setting: 110°F
Turn off the hot
water when the
5
alarm sounds.
The alarm will sound when
the set level has been
reached. Stop the water.
The alarm will not
Note:
sound if it is set for
990 gal.
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
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
1
Button for five seconds.
Muted
No sound
after 5 sec.
Sound
Tone sounds
after 5 sec.
16
The flow meter alarm cannot be muted.
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 disconnected.Do 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.
1. Turn the unit on with the Power Button on the Remote Controller.
2. Close the gas supply valve.
3. Open 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.
4. Partially 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.
5. The flow may become unstable from time to time. Check the flow
30 minutes later.
Hot Water Fixture
.2" thick
* 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:
1. Close the gas and water valves.
2. Turn off the power button.
3. Open the water supply valve from time to time to check whether water is running.
4. When 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
Drain water into a bucket to prevent water damage.
1. Close 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.
*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.
3. Close the water supply valve, disconnect
the electrical power supplied to the unit.
Do not touch with wet hands.
4. Fully open all hot water fixtures.
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain hot
after it is turned off.
Fixture
Fixture
18
5. Open all drain plugs and drain the water out
of the unit.
6. When the water is completely drained, replace all drain
plugs and close the hot water fixtures.
Turning the Unit Back On
1. Check that all drain plugs are inserted.
2. Check that all hot water fixtures are closed.
3. Follow the procedure on p.11 “Initial operation”, steps 1 through 4.
Drain Plugs
Regular Maintenance-1
Periodic Inspection
Caution
High Temperature
For laundry, newspaper, timber,
Check
oil, spray cans and other
combustible materials. ( p.5)
For abnormal sounds
Check
during operation.
For abnormalities in
Check
external appearance,
discoloration or flaws.
For proper operation of
Check
pressure relief valve.
For water leaks from the
Check
equipment and piping.
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain
hot after it is turned off.
For dust and soot in
Check
the exhaust vent or
exhaust vent terminal.
For dust or debris in
Check
the air inlet.
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 Filter
If the 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.
1. Close the water supply valve.
2. Open all hot water fixtures.
3. With a bucket ready, remove the inlet and outlet
drain plugs (about 0.6 gal. will drain out)
4. Take the water filter out of the inlet.
(See illustration to right).
5. Clean the filter with a brush under running water.
6. Replace the filter and close the drain plugs.
(Take care not to lose the packing.)
7. Close all hot water fixtures.
8. Open the water supply valve and check that
water does not leak from the drain plugs or filter.
Water Filter
Lid
Packing
Water Supply
Valve
Inlet
20
Optional Maintenance
Water Heater Service Valves (IK-WV-3)
Hot Water
Service Valve
Pressure Relief Valve
Drain
Water Outlet
Water Intlet
Cold Water
Service Valve
* Isolator valve kits may be purchased as an
accessory from Noritz (Part #IK-WV-3).
They allow for one man full diagnostic testing
and easy flushing of the system.
* The kit includes two full port isolation valves
and a pressure relief valve for the hot side.
Contact Noritz for more information.
Troubleshooting-1
Initial Operation
Unit does not attempt to ignite
when water is running.
Unit attempts to ignite but fails
Hot water is not available
when a fixture is opened.
• Is water running?
• Check for reversed plumbing or crossed pipes.
• Check water filter. ( p.20 )
• Reset unit and try again. There may be air in the gas line.
• Have a professional check the gas supply pressure.
Temperature
•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 filter clogged? ( p.20 )
• 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?
•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
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