Noritz N-132M Instruction manual

SAQ8975 r
Rev. 3/05
Model N-132M
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.
Owner’s Guide and
Installation Manual
*SAQ8975 T*
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.
Low NOx
Approved by SCAQMD
CERTIFIED
R
NORITZ America Corporation

2
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
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
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

3
Prohibited Don’t
touch.
Don’t
disassemble
the equipment.
Don’t touch
with a wet
hand.
No flame.
High
Temperature.
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.
Other icons
Danger
Warning
Caution
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.
Remarks
Be sure
to do. Ground.
Electric
Shock.
Danger
Do not use the water heater if
the exhaust pipe is displaced, has
holes, or is corroded.
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.
Icons warning of risk level
Important Safety Information-1

4
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.
Do not turn off the water heater or
change the water temperature while
someone is using.
Be sure the gas/power supplied
matches the gas on the rating
plate.
Warning
Important Safety Information-2
Contact Noritz before using with
a solar pre-heater.
Contact a qualified service
technician for any necessary
repairs, service or maintenance.
Consult the nearest Noritz agent if
the water heater location needs to
be changed.
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to
bathe unsupervised.
For Natural Gas

5
Leave the proper clearance between
the water heater and nearby objects
(trees, timber, boxes with flammable
materials etc.).
Do not place or use a spray can
near the heater or the exhaust vent
terminal.
Left side:
Min. 2" Right side:
Min. 2"
Min. 3" from
vent pipe
Do not place combustibles such as
laundry, newspapers, oils etc. near
the heater or the exhaust vent
terminal.
Exhaust vent
terminal (indoor
installation)
*Indicates suggested clearances for
maintenance.
Front:
Sug. 24"*
Warning
[When installing indoors]
Check the air supply
vent for dust or
obstructions.
Do not use combustible chemicals
such as oil, gasoline, benzene etc.
in the vicinity of the heater or the
exhaust vent terminal.
Unit

6
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.
Caution
Important Safety Information-3

7
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.
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.
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.
Check ignition during use and extinction
after use.
Do not use parts other than those specified
for this equipment.
Remark

8
General Parts
Indoor/Outdoor Wall Mounted, Power Vented Model
* The above illustration shows an example of installation.
The exact installation configuration may be slightly different.
Main Unit
Flue Collar
Front Cover
Air Inlet
Water Supply Valve
Gas Supply Valve
Water Filter
(Inside Water Inlet)
(p.20)
Pressure Relief Valve

9
Remote Controller (RC-7646M-2)
Display
(
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)
Setting Buttons
* 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.

10
Temperature Setting
(Ex.: 110°F)
Flow Meter Setting
The display will flash
after hitting the flow
meter alarm set button.
(
p.15)
Error Code
When this indicator
is lit, the hot water
temperature can be
set. (p.13)
Priority Indicator
The illustration below shows the remote controller display. What is actually displayed
depends on how the water heater is set.
Burner On Indicator
A number will flash if
a failure occurs.
(p.24)
Display