Noritz N-042 Installation Manual
“Owner’s Manual and Installation Guide
and Warranty Registration Card”
Model N-042
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 a Noritz Gas Water Heater. Before using this water heater, please:
• Read this manual to learn how to operate this water heater correctly.
• Make sure the date and location of purchase indicated on the warranty registration
card is included separately.
• Keep this manual (and the warranty registration card) where it can easily be found
R
whenever necessary.
NORITZ America Corporation
SAQ8625w
*SAQ8625 T*
Contents
Contents ........................................................................................................ 1
Owner’s Manual
IMPORTANT SAFETY INFORMATION......................................................... 2
Names and Functions of Components ....................................................... 7
IMPORTANT SAFETY INFORMATION -1
( Be sure to read and observe all safety information in this manual )
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 follwing three
categories. Closely observe these warnings, they are critical to your safety.
Indications depending on the level of damage or injury
Danger
Ignoring this indication may cause immediate danger of death or
serious injury.
Operation (Remote controller).....................................................................8
Initial Operation ........................................................................................... 10
Running /Adjusting Hot Water....................................................................11
Tub Level Alarm........................................................................................... 13
Muting the Sound of the Remote Controller ............................................. 15
Prevention of Damage Caused By Freezing in Cold Temperatures ....... 16
Regular Maintenance...................................................................................18
Troubleshooting .......................................................................................... 20
Follow-up Service ........................................................................................ 24
Specifications .............................................................................................. 25
External outfitting ........................................................................................ 26
Combustion unit and gas route..................................................................28
Hot-water feed route.................................................................................... 30
Electronic control unit and attached set ................................................... 33
Installation Guide.........................................................................................36
1. Included accessories ............................................................................ 37
2. Before installation ................................................................................. 37
3. Choosing installation site..................................................................... 38
4. Installation clearances ..........................................................................39
5. Installation..............................................................................................40
6. Exhaust piping installation................................................................... 41
7. Gas piping ..............................................................................................44
8. Supply water and hot water piping ...................................................... 45
9. Electric wiring ........................................................................................46
10. Trial operation........................................................................................47
Dimensional outline drawing...................................................................... 48
Ignoring this indication may result in death or serious injury.
Warning
Ignoring this indication may result in serious injury or physical dam-
Caution
Remark
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.
A flame or spark may
ignite the leaked gas.
age.
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 when
the exhaust pipe is displaced, has
holes, or is corroded.
This may allow exhaust to leak from the
pipe, which can result in death from
carbon monoxide poisoning.
Don’t touch
with a wet
hand.
1
2
IMPORTANT SAFETY INFORMATION -2
Warning 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
This will prevent fire, electric shock or
damage to the unit.
Check the temperature of the
running hot water by hand before
taking a shower.
Also check the temperature by
hand before stepping into the bath
tub.
Be sure the gas supplied matches
the gas on the rating plate.
Manufacturing year and month
Using an improper gas or electric supply
may cause improper operation, fire or
electric shock.
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to
bathe unsupervised.
Accidents may occur.
Do not place combustibles such as
laundry, newspapers, oils etc. near
the heater or the exhaust vent
terminal.
Exhaust vent
terminal
These may cause a fire.
Do not use combustible chemicals
such as oil, gasoline, benzene etc.
in the vicinity of the heater or the
exhaust vent terminal.
These may cause a fire.
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 exhaust
Left side:
Min. 2"
Front:
Min. 24"
* Indicates suggested clearances for
maintenenance.
Do not place or use a spray can
near the heater or the exhaust vent
terminal.
This may result in an explosion or fire.
pipe
Right side:
Min. 2"
Do not turn off the water heater or
change the water temperature while
someone is bathing.
This can result in scalding or temperature
shock.
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.
43
IMPORTANT SAFETY INFORMATION -3
Remark Caution
Be sure to electrically ground the
unit.
Do not touch the power cord with
wet hands.
Keep power cord free of dust.
This can cause a fire.
Do not use a broken or modified
power cord. Do not bind, bend or
stretch power cords.
Do not place things on them,
scratch. 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.
To prevent unexpected accidents.
Do not touch the exhaust vent pipe
during or immediately after operation of the water heater.
Do not connect the water heater to
a solar water heater.
This can result in unreliable temperature
control, scalding or equipment failure.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
These may cause damage to the heater.
Do not drink water that was inside the unit
for an extended period of time, do not
drink the water that comes out of the unit
just after the first use of hot water in the
morning.
Use it for other purposes.
Clean the filter on the water inlet.
If you don’t know where the filter is, contact the
nearest Noritz agent.
Keep the area around the unit clean.
If boxes, weeds, cobwebs, cockroaches etc. are
allowed to be 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.
This may cause damage or discoloration.
Do not use spring water or well water.
This can cause damage and reduce durability.
Check for proper combustion during
operation and that the flame stops after
operation is finished.
To prevent accidents due to gas.
Do not disassemble the remote controller.
This may cause damage to the heater or unexpected accidents.
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 waterproof, 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.
Take measures to prevent the unit from
freezing. ( P16)
If water is allowed to freeze inside the unit, the unit
may be damaged, and water can leak out of it.
Take necessary measures to prevent
freezing of water and leakage of gas when
leaving the unit unused for long periods of
time. ( P17)
If it is snowing, check the air inlet, exhaust
gas vent and exhaust vent terminal for
blockage.
This can result in improper function or damage to
the unit.
5
Do not use parts other than those specified for this equipment.
6
Name and Functions of Components
Operation (Remote Controller)
Main unit
Indoor / Outdoor wall mounted power vented model
Exhaust gas vent
Front cover
Operation Panel
Air inlet
Water filter
Mounted inside.
( P19)
Display
( next page)
Operation Panel (RC-7646M)
Setting button
For setting the hot
water temperature,
and other adjustments.
Operation button
For turning the
heater on and off
Water fill set button
For setting the level of
hot water.
( p.13 and 14)
Gas valve
Water supply valve
* The above illustration shows an example of installation.
The shape of the piping, and the location of the water main, gas main and power cord will
depend on the specific installation.
* Before use, remove the protective sheet from the remote controller surface.
7
8
Display
Initial Operation
Before the first use of your water heater, the following preparations and checks are necessary.
The illustration below shows the remote controller display. What is
actually displayed depends on how the water heater is set.
Priority indicator
When this indicator
lights, the hot water
temperature can be set.
( p.12)
Burning indicator
Water temperature
(Ex.: 104°F)
Water level
The display will flash
( p.14)
Failure indicator
A number will flash if
a failure occurs.
( p.23)
Follow steps 1 through 4.
Fully open the water supply
valve. (Turn the handle so
1
that is lines up with the pipe)
OFF ON
Open a hot water fixture to confirm that
water is available, and then close the
2
fixture again.
Hot water fixture
9
Fully open the gas valve.
3
Turn on the power.
4
10
How to use
Running /Adjusting Hot Water
<With Operation button Off>
2
1
1
Press the
Operation button.
Adjust temperature.
Check the temperature
2
if you will not be
(
changing it
)
Run hot water.
3
Stop the hot
water.
4
Caution
High Temperature
Temperature above 125 degree can scald.
To prevent scalding:
On
The temperature will be
indicated on the display.
On
Previously set
temperature
(Ex.: 104°F)
Hot
Cold
Check the indicator lights.
Water temperature
The figures shown below are just examples. The actual temperature setting
°F:
(
necessary depends on the usage, the length of piping and the season
99 100 102 104 106 108 109 111 113 115 117 118 140 167
Washing
dishes, etc.
If the remote controller was left set at 167° F the last time it was used, the setting will drop to
140° F as a safety precaution.
Shower, hot water supply,
etc.
*Initial setting (factory setting at shipment)=104°F
Hot water supply, etc.
On
)
High
temperature
Off
If using a mixing valve, set the water
temperature on the remote control
approximately 18°F higher than
usual.
• Check the water temperature by hand before bathing or
showering.
• When you set the temperature to 140° F or 167° F, the
display will flash for 10 seconds to remind you that this
is a high temperature.
• Be careful the next time you use the heater after setting
it at 140° F or 167° F. Check the temperature setting
before using.
• Do not allow anyone to change the water temperature
while hot water is running.
<Remote controller display>
Flash for 10 sec → light up
1211
How to use
Tub Level Alarm
Preparation
1. Plug the bath drain.
2,3
1
3
<With the operation button off>
Press the
Operation button.
1
The temperature will be
indicated on the display.
On
On
Adjust temperature.
Check the
2
temperature if you will
(
not be changing it
Hot
Cold
Check the indicator lights.
)
The alarm will sound for ten
seconds when the water
reaches the specified level.
(But the water will continue to run
unless it is manually turned off.)
<The setting is remembered>
Adjust tub level
3
setting
Press the operation button (the level
setting indicator will flash) and then
the setting button.
Increase
Decrease
Set the water level of your tub, the
choices for settings are anything between 10 and 65 gal., in increments
of 5, and 80, 90, 105 and 990 gal.
(Reference values)
The alarm will not sound if it
Note:
is set for 990 gal.
Run the hot
4
water.
Water temperature
The temperatures shown below are only examples. Your actual
reaction to set temperatures will depend on the season and the
length of piping.
99 100 102
* Initial factory setting at shipment: 104° F
On
104 106 108 109 111 113 115 117 118
Warmer HotWarm
Stop the hot
water when the
5
alarm sounds.
The alarm will sound when
the specified level has been
reached. Stop the water.
The alarm will not
Note:
sound if it is set for 990
gal.
Off
Previously set temperature
(
ex.
: 104ºF)
Water temperature
Water level will be flashing (ex.:45 gal.)
* The level can be adjusted while
the indicator is flashing.
* The temperature will return after
ten seconds.
• If water is being used besides what is needed for the tub, the alarm will sound before the set
level is reached in the tub.
• If there was water remaining in the tub, or if the water is not manually turned off after the
buzzer sounds, the tub may overflow.
• If there was water remaining in the tub, the temperature after the tub is filled the rest of the
way will be less than the set temperature.
1413
How to use
Muting the Sound of the Remote Controller
When any button on the remote controller is
pushed, a sound is emitted. This sound can be
muted if you desire.
1
With the remote controller off, press
and hold the operation button for five
1
seconds to turn the sound on or off.
Prevention of damage caused by freezing in cold temperatures
The heater and piping can be damaged if cold temperatures cause water to freeze inside the
unit. The damage can be prevented with the following method:
Normal cold [outside temperatures more than 5°F with no wind.]
At these temperatures, the units have freeze prevention heaters that will prevent freezing.
* Do not disconnect the power. The freeze prevention heaters will not work if the power
is disconnected.
* The freeze prevention will work regardless of whether the operation button on the remote
controller has been turned on.
When the temperature drops, the freeze-prevention
heaters are automatically activated to keep the unit
warm and prevent it from freezing.
For severely cold temperatures []
Run water to prevent freezing
outside temperature including wind chill
is less than 5°F
The freeze prevention heaters will
not prevent the plumbing external
to the unit from freezing. Protect
this plumbing with insulation or an
electric heater. If you are still
worried that your heater will
freeze, contact the nearest Noritz
agent.
Mute
No sound
Sound
After approx.
5 sec., sound
1. Push the operation button and confirm
that the operation light comes on.
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
* 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. Open a hot water fixture, and 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.
5. The flow may become unstable from time to time. Check
the flow 30 minutes later.
Hot water fixture
.2” thick
• This method can be applied
not only to the heater, but also
to the water supply, water
piping and a mixing valve.
• Remember that if the mixing
valve is set to the maximum
level, there is a risk of scalding.
• If freezing still might occur,
drain the water from the unit
following the steps on p. 17.
If water will not flow because it is frozen
1. Close the gas and water valves.
2. Turn off the operation 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, or
follow steps 1 through 4 on p. 10 (“Initial Operation”)
Water level alarm cannot be muted.
15
• If the heater or the piping is frozen, do not use the heater, or it may get damaged.
• Repairs for damage caused by freezing is not covered by the warranty.
16
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