Noritz N-084M-DV Instruction manual

*SAR8157T*
SAR8157q
Rev. 3/05
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
Model N-084M-DV
NORITZ America Corporation
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

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................................................................................ 33
Electronic Control Unit, Remote Controller and Attached Set................ 34
Installation Manual ...................................................................................... 35
1. Included Accessories............................................................................ 36
2. Optional Accessories............................................................................ 36
3. Quick Connect Multi System Installation ............................................ 37
4. Before Installation ................................................................................. 38
5. Choosing Installation Site .................................................................... 39
6. Installation Clearances ......................................................................... 40
7. Installation.............................................................................................. 42
8. Vent Pipe Installation ............................................................................ 42
9. Gas Piping.............................................................................................. 46
10. Water Piping........................................................................................... 48
11. Plumbing Applications.......................................................................... 49
12. Electrical Wiring .................................................................................... 50
13. Maintenance........................................................................................... 54
14. Trial Operation ....................................................................................... 54
15. Dimensions and Wiring Diagram ......................................................... 55
16. Multi-System .......................................................................................... 57
Remote Controller Installation Guide ........................................................ 61

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
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
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
Do not use the water heater if
the intake/exhaust pipe is
displaced, has holes, or is
corroded.
Danger
Warning
Caution

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"
Do not place combustibles such as
laundry, newspapers, oils etc. near
the heater or the exhaust vent
terminal.
*Indicates suggested clearances for
maintenance.
Front:
Sug. 24"*
Warning
Do not use combustible chemicals
such as oil, gasoline, benzene etc.
in the vicinity of the heater or the
exhaust vent terminal.
Sug.3"from
vent pipe*
Vent terminal Upper:
Min. 2"

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 opera-
tion 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 sa-
lon or other location where hair
spray or aerosols will be used, lo-
cate the unit away from where
these products are used.
Do not install in locations where
excessive dust or debris will be
in the air.
Caution
Important Safety Information-3

7
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 fre-
quently 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 ex-
haust 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 af-
ter use.
This unit is only approved for installation
up to 4500 ft. above sea level.
For installations at higher elevations, con-
tact Noritz America for instructions.
Do not use parts other than those specified
for this equipment.
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 control-
ler. 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 freez-
ing of water and leakage of gas when leav-
ing the unit unused for long periods of time.
(p.18)
If it is snowing, check the exhaust gas vent
and exhaust vent terminal for blockage.
Remark

8
General Parts
Indoor 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
Water Supply Valve
Gas Supply Valve
Pressure Relief Valve
Water Drain Valve (with Water Filter)
(Inside Water Inlet) (p.20)
Intake pipe

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 control set 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

11
Initial Operation
Before the first use of your water heater, make the following preparations.
Follow steps 1 through 4.
1Open the water supply valve.
Open a hot water fixture to confirm that
water is available, and then close the
fixture again.
3Open the gas supply valve.
Hot water fixture
2
Turn on the power.
CLOSED
4
OPEN

12
Remote Controller Display
Press the Power
On/Off Button.
How to Use
Setting and Using the Water Heater
Previous set
temperature
(Ex.: 110°F)
The temperature will be
displayed on the remote
control thermostat.
1
2(Starting with the Power Off)
On
On
Caution
High Temperature
To prevent scalding:
• 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.
Temperatures above 125 °F can scald.
Flashes for 10 sec
1

13
100 105 110 115 120 125 130 135 140 145 150 160 170 180
Shower, hot water
supply, etc.
Washing
dishes, etc.
High temperature
4
3Turn on hot
water.
2
Set temperature.
Turn off the hot
water.
(
Always check the
)
temperature setting
before use.
Hot
Cold
Check the indicator lights.
Water temperature
On Off
(°F: )
The temperature settings below are examples. The temperature setting
necessary depends on the usage, the length of piping and the time of year.
*Initial factory setting is 110°F
If fixtures incorporate mixing
valves, set the temperature
higher than usual.
* 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.61).
* Consult local codes for minimum operating temperatures.

14
How to Use
Flow Meter Alarm
3
2,3
1
2
Set temperature.
1Press the Power
On/Off Button
1. Plug the bath drain.
Preparation
(Starting with the power off)
(
Always check
)
temperature setting
before use.
Hot
Cold
On
The temperature will be displayed
on the remote control thermostat.
Previous set temperature
(example:110°F)
On Check the indicator lights.
Water temperature

15
100 105 110 115 120
An alarm will sound for ten
seconds when the flow
reaches the set level.
The water will continue to run unless it is
manually turned off. * Initial factory setting: 110°F
Water Temperature
The temperatures settings below are only examples. The
temperature setting necessary will depend on the usage,
the length of piping and the time of year.
(°F: )
Warmer HotWarm
5Turn off the hot
water when the
alarm sounds.
4Turn on hot
water.
3Adjust flow meter
alarm setting.
To set the flow meter alarm:
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.
Note:
The alarm will not sound if
it is set for 990 gal.
Note:
The alarm will not
sound if it is set for
990 gal.
On
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.
Off
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.
The alarm will sound when
the set level has been
reached. Stop the water.

16
The remote controller will emit a sound
when any button is pushed. This sound
can be muted if it is desired.
1
How to Use
Muting the Remote Controller
* Initial factory setting is with sound.
Sound
Muted
No sound
after 5 sec.
1With the remote controller
off, hold the Power On/Off
Button for five seconds.
Tone sounds
after 5 sec.
The flow meter alarm cannot be muted.

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.
Remarks
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.
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
Preventing Damage from Freezing-1
Freezing is prevented within the device automatically by the freeze-prevention heater
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.
.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.
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.

18
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.
4. Fully open all hot water fixtures.
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.
If the water heater will not be used for a long period of time,
Drain the water.
Drain the water as follows:
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain hot
after it is turned off.
High Temperature
Drain water into a bucket to prevent water damage.
Caution
Do not touch with wet hands.
Drain Plugs
Fixture
Fixture
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.
Preventing Damage from Freezing-2

19
Check
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain
hot after it is turned off.
High Temperature
Periodic Maintenance
Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to
clean any stains.
•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 as dry as possible.
Caution
Regular Maintenance-1
Periodic Inspection
For laundry, newspaper, timber,
oil, spray cans and other
combustible materials. ( p.5)
Equipment
Remote Controller
Wipe the surface with a wet cloth.
For abnormal sounds
during operation.
For abnormalities in
external appearance,
discoloration or flaws.
For water leaks from the
equipment and piping.
For dust and soot in
the flue terminal.
For proper operation of
pressure relief valve.
Check
Check
Check
Check
Check

20
Periodic Maintenance
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 Drain Valve (with Water Filter)
* Water will be discharged from the drain plug.
Place a container, etc. to receive the discharged
water.
1. Close the water supply valve.
2. Open all hot water fixtures.
3. Remove the inlet and outlet drain plugs (about
0.3 gal. will drain out)
4. Take the water drain valve (with water filter) out
of the inlet. (See illustration to right).
5. Clean the water drain valve (with water filter) with
a brush under running water.
6. Replace the water drain valve (with water filter).
(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 water
drain valve (with water filter).
Water Supply
Valve
Regular Maintenance-2
Inlet
Packing
Drain Plug
(with filter)
Optional Maintenance
* 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.
* The kit includes two full port isolation valves
and a pressure relief valve for the hot side.
Contact Noritz for more information.
Water Heater Service Valves (IK-WV-2)
Water Intlet
Water Outlet
Drain
Hot Water
Service Valve
Pressure Relief Valve Cold Water
Service Valve