Noritz NR98-DVC-CA User manual

SBA8352
Rev. 09/09
Model NR98-DVC-CA
TANKLESS GAS WATER HEATER
Owner’s Guide
NORITZ America Corporation
- 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.
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or death.
WARNING
Canada
Thank you for purchasing this Noritz Tankless Gas Water Heater.
Before using, please:
Read this manual completely for 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.
Installation must conform with local codes, or in the absence of local codes,
the National Fuel Gas Code, ANSI Z223.1/NFPA 54.
When applicable, installation must conform with the Manufactured Home
Construction and Safety Standard, Title 24 CFR, Part 3280 or the Canadian
Standard CAN/CSA-Z240 MH Mobile Homes, Series M86.
Noritz America reserves the right to discontinue, or change at any time, the
designs and/or specifications of its products without notice.
FOR USE IN RESIDENTIAL, COMMERCIAL, OR MANUFACTURED HOME APPLICATIONS.
CERTIFIED
R
Accepted For Use
City of New York
Department of Buildings
MEA 19-03-E
*SBA8352*

2
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 four
categories. Closely observe these warnings; they are critical to your safety.
Other icons
DANGER
WARNING
CAUTION
DANGER indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a potentially
hazardous situation which, if not avoided, may result in property damage.
CAUTION
Be sure
to do. Ground.
Electric
Shock.
DANGER
Icons warning of risk level
Important Safety Information-1
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
Vapors from flammable liquids will explode and catch fire causing death or severe burns.
Do not use or store flammable products such as gasoline, solvents or
adhesives in the same room or area near the water heater.
Prohibited
Keep flammable products:
1. Far away from the water
heater.
2. In approved containers.
3. Tightly closed.
4. Out of children’s reach.
Vapors:
1. Cannot be seen.
2. Vapors are heavier than air.
3. Go a long way on the floor.
4. Can be carried from other rooms
to the main burner by air currents.
Hot Water Heater temperatures over 52°C (125°F) can cause severe burns
instantly or death from scalding.
Children, disabled and elderly are at the highest risk of being scalded.
Feel water temperature before bathing or showering.
Temperature limiting valves are available, ask professional person.
Prohibited
(Continued)

3
No flame.
(Continued)
WARNING
Be sure
to do.
When a gas leak is noticed:
1. Stop use immediately
2. Close the gas valve
3. Open windows and doors
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 supply
valve.
4. Call the nearest Noritz agent
Be sure
to do.
Do not allow anyone to change the
water temperature while hot water is
being used.
To prevent scalding, do not change the wa-
ter temperature to a higher setting.
Prohibited
A. 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.
B. BEFORE OPERATING smell all
around the water heater area for
evidence of leaking gas. Be sure
to smell next to the floor because
some gas is heavier than air and
will settle on the floor.
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.
C. Use only your hand to turn the
gas valve knob. Never use tools.
If the knob will not turn by hand,
don’t try to repair it. Call a
qualified service technician.
Force or attempted repair may
result in a fire or explosion.
D. Do not use this water heater if
any part has been under water.
lmmediately call a qualified
service technician to inspect the
water heater and to replace any
damaged parts.
(Continued)
Prohibited
Do not use the water heater if
the concentric pipe is displaced,
has holes, is clogged or is
corroded.
Check the temperature
of the running hot water
before entering the
shower.
Check the temperature
before stepping into
the bath tub.
High
Temperature.
Explosion Hazard ;
If the temperature and pressure relief
valve is dripping or leaking, have a
qualified service technician replace it.
Do not plug or remove the valve.
Failure to follow these instructions can re-
sult in fire or explosion, and personal injury
or death
Prohibited

4
Important Safety Information-2
(Continued)
If this unit will be installed in a beauty
salon or other location where hair
spray or aerosols will be used, locate
the unit in a separate area that is
supplied with fresh air from outdoors.
Prohibited
Be sure the gas/power
supplied matches the
gas on the rating plate.
For Natural Gas
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
Be sure
to do.
Be sure
to do.
(Continued)
Do not place the flue terminal in an in-
door environment by means of adding
walls and ceiling (Do not enclose using
corrugated sheets, etc.)
Carbon monoxide poisoning or fire may
occur as a result.
Prohibited
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Prohibited
Do not place or use a spray can near
the water heater or the flue terminal.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
Prohibited
Prohibited
Do not place outdoors
Rain may enter the unit or
the burner fire may be
blown by the wind, causing
malfunction or fire as a
result.
Prohibited
Outdoor
Leave the proper clearance between
the water heater and nearby objects
(trees, timber, boxes with flammable
materials etc.).
Be sure
to do.
*Indicates suggested clearances for maintenance.
Left side:
Min. 50mm (2") Right side:
Min. 50mm (2")
Front:
Sug. 600mm (24")*
Sug. 75mm (3")
from concetric
pipe*
Upper: Min.
300mm (12")
Flue terminal
Do not place combustibles such as
laundry, newspapers, oils etc. near
the heater or the flue terminal.
Prohibited
Flue terminal
Do not use combustible chemicals
such as oil, gasoline, benzene etc. in
the near the heater or the flue terminal.
Prohibited
Carbon Monoxide Poisoning Hazard.
Do not install this water heater in a
recreation vehicle or on a boat.
Prohibited
199,900
168,000
3.3
3.1" 3.1"
3.3
192,800
162,000
199,900 BTU
11,000 BTU 202
4.0
0.65 3.1"
10.5"
750
10.3a-2007
15 150
4.3a-2007
2
NR98-DVC-CA
WARNING

5
(Continued)
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to
bathe unsupervised.
Do not touch the power
cord with wet hands.
Electric
Shock.
Don’t touch
with a wet
hand.
Prohibited
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.
Don’t
disassemble
the equipment.
Be sure
to do.
Be sure
to do.
California Proposition 65 lists chemical
substances known to the state to cause
cancer, birth defects, death, serious illness
or other reproductive harm. This product
may contain such substances, be their
origin from fuel combustion (gas, oil) or
components of the product itself.
CAUTION
Be sure to electrically ground the
unit.
Keep power cord free of dust.
Ground.
Be sure
to do.
Do not use the water heater for
other than hot water supply, shower
and bath.
Prohibited
Prohibited
Do not cover the water heater and
the flue terminal, store trash or
debris near it, or in any way block
the flow of fresh air to the unit.
Do not turn off the water heater
while someone is bathing.
Prohibited
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 touch the flue terminal and
concentric pipe during or
immediately after operation of the
water heater.
Do not install in locations where
excessive dust or debris will be
in the air.
Prohibited
Don’t
touch.
Prohibited
Be sure
to do.
To prevent burns or scalding, turn
off the power button and wait until
the equipment cools before per-
forming maintenance.
The gas conversion kit shall be installed by a
qualified service agency in accordance with
the manufacturer’s instructions and all
applicable codes and requirements of the
authority having jurisdiction. The
information in the instructions must be
followed to minimize the risk of fire or
explosion or to prevent property damage,
personal injury, or death. The qualified
service agency is responsible for the proper
installation of this kit. The installation is not
proper and complete until the operation of
the converted appliance is checked as
specified in the manufacturer’s instructions
supplied with the kit.

6
Important Safety Information-3
CAUTION
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.
Problems resulting from scale formation
are not covered by the warranty.
This unit is only approved for installation
up to 1350m (4500 ft.) above sea level.
For installations at higher elevations, contact Noritz
America for Instructions.
Check ignition during use and extinction
after use.
Do not run water through the unit when
unit is not on.
When discharging hot water, make sure the unit is ON.
If water is run through the unit with the unit
OFF, water may condense inside the unit and cause
incomplete combustion or damage to the internal
electrical components.
For single-handle fixtures or valves, discharge
water setting the handle completely
to the water side.
If the water supply is in excess of 12 grains
per gallon (200 mg/L) of hardness, acidic or
otherwise impure, treat the water with
approved methods in order to ensure full
warranty coverage. 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)
Do not use parts other than those specified
for this equipment.
If it is snowing, check the flue terminal for
blockage.
Do not disassemble the operation panel.
Do not use benzene, oil or fat detergents
to clean the operation panel.
This may cause deformation.
Do not get the operation panel wet.
Although it is water resistant, too much water can
cause damage.
Do not splash water on the operation
panel. Do not expose the operation panel
to steam.
Do not locate the operation panel near stoves or
ovens, this may cause damage or failure.

7
Important Safety Information....................................................................... 2
Contents ........................................................................................................ 7
General Parts
Main Unit.................................................................................................... 8
Operation Panel ........................................................................................ 9
Initial Operation ........................................................................................... 10
How to Use
Muting the Operation Panel ..................................................................... 11
Setting and Using the Water Heater........................................................ 12
Flow Meter Alarm ...................................................................................... 14
Adjusting the Maximum Output Temperature........................................ 16
Preventing Damage from Freezing ............................................................ 17
Regular Maintenance................................................................................... 19
Troubleshooting .......................................................................................... 21
Follow-up Service ........................................................................................ 25
Specifications .............................................................................................. 27
Contents

8
Indoor Wall Mounted, Power Vent/Sealed Model
* The above illustration shows an example of installation.
The exact installation configuration may be slightly different.
Main Unit
Front Cover
Water Supply Valve
Gas Supply Valve
Water Drain Valve (with Water Filter)
(Inside Water Inlet) (p.20)
Pressure Relief Valve
General Parts
Concentric Pipe
Operation Panel

9
Operation Panel (RC-7650M)
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 - 15)
Setting Buttons
* Before use, remove the protective sheet from the operation panel surface.
Temperature Setting
(Ex.: (40°C)(104°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.12)
What is actually displayed depends on how the water heater is set.
A number will flash if
a failure occurs.
(p.24)
Priority Indicator
Burner On Indicator
When burning, the
indicator is lit.
( p.13 and 15)

10
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
Do not touch with wet hands.

11
The operation panel will emit a sound
when any button is pushed. This sound
can be muted if it is desired.
1
How to Use
Muting the Operation Panel
* Initial factory setting is with sound
Sound
Muted
No sound
after 5 sec.
1Hold the Power On/Off
Button for five seconds.
Tone sounds
after 5 sec.
• The flow meter alarm cannot be muted.
• The high temperature warning tone when setting the unit to 55°C (131°F) or higher will not emit
a sound when muted.

12
Operation Panel Display
Press the Power
On/Off Button.
How to Use
Setting and Using the Water Heater
Previous set
temperature
(Ex.: 40°C (104°F))
The temperature will be
displayed on the operation
panel thermostat.
1
2(Starting with the Power Off)
On
On
High Temperature
To prevent scalding:
Flashes for 10 sec
1
DANGER
Hot Water Heater temperatures over 52°C (125°F) can cause
severe burns instantly or death from scalding.
•Children, disabled and elderly are at the highest risk of being scalded.
Feel water temperature before bathing or showering.
Temperature limiting valves are available, ask professional person.
•When setting the unit to 55°C (131°F) or higher, the temperature
display will flash for 10 seconds and emit a tone as a high
temperature warning.
•Take caution when using the unit again after setting to 52°C
(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.

13
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
(°C (°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 40°C (104°F)
If fixtures incorporate mixing valves,
set the temperature higher than usual.
* For most residential applications, the recommended setting temperature is 50°C (122°F) or less.
* Consult local codes for minimum operating temperatures.
Shower, hot water supply, etc.
Washing
dishes, etc.
High temperature
Contact the installer or Noritz
America when setting the
maximum output temperature
in this range.
37 38 39 40 41 42 43 44 45 46 47 48 50 55 60 65 70 75 80 83
(99) (100) (102) (104) (106) (108) (109) (111) (113) (115) (117) (118) (122) (131) (140) (149) (158) (167) (176) (181)
The maximum output tem-
perature can be set using
the operation panel.
( p.16)

14
How to Use
Flow Meter Alarm
3
2,3
1
2
Set temperature.
Press the Power
On/Off Button
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 operation panel thermostat.
Previous set temperature
(example:40°C (104°F))
On Check the indicator lights.
Water temperature
1

15
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: 40°C (104°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.
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: 40 - 240L (10 - 60 gallon)
(In 20L (5 gallon) intervals), 260L (70 gallon),
300L (80 gallon), 340L (90 gallon),
380L (100 gallon) , 990L (262 gallon)
Note: The alarm will not sound if it is
set for 990L (262 gallon).
Note: The alarm will not
sound if it is set for
990L (262 gallon).
On
Flow meter setting will be flashing
(ex. 180L (48 gallon))
*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.
(°C (°F) : )
Warmer HotWarm
37 38 39 40 41 42 43 44 45 46 47 48
(99) (100) (102) (104) (106) (108) (109) (111) (113) (115) (117) (118)

16
How to Use
Adjusting the Maximum Output Temperature
2
3
1
3
Change the
temperature using
the setting buttons.
Press and hold the flow
meter alarm set button until
a sound is heard (2 sec.).
Up
Down
The upper limit of the hot-water supply
temperature can be changed to 37°C
(99°F), 38°C (100°F), 39°C (102°F),
40°C (104°F), 41°C (106°F), 42°C
(108°F), 43°C (109°F), 44°C (111°F),
45°C (113°F), 46°C (115°F), 47°C
(117°F), 48°C (118°F), 50°C (122°F),
55°C (131°F) or 60°C (140°F).
2
Turn off the
power.
Off
1
Set the Power button to ON when continuing to use
the unit as is. Otherwise, let the unit sit for 30 sec.
4
Tone sounds
after 2 sec.

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.
Freezing cannot be prevented when the power plug is unplugged. Do not remove the power
plug from the wall outlet.
(Freezing will be prevented regardless of whether the operation switch is ON or OFF.)
Take the measures below for extremely cold temperatures*.
(outside temperature including wind chill factor less than -35°C (-30°F) .
This method can protect not only the heater, but also the water supply,
water piping and mixing valves.
1. Turn off the power.
2. Close the gas supply valve.
3. Open a hot water fixture, and keep a small stream of hot water
running. (400cc (0.1 gallon)/minute or about 4mm (0.2") thick.)
* If there is a mixing valve, set it to the highest level.
* When linking multiple units, discharge water equivalent to
(400cc (0.1 gallon)/minute per unit.
4. The flow may become unstable from time to time. Check the flow
30 minutes later.
* In general, it is not advisable to run water through the unit when
it is OFF ( p. 6), but in this case freeze prevention is more
important.
* Remember to set mixing valves and fixtures to their original levels before using the unit again
to prevent scalding.
* If there is still a risk that the unit will freeze, drain the unit as shown on the next page.
4mm (0.2")
thick
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.
CAUTION
* In normal operation, freezing is prevented within the device automatically unless the outside
temperature without wind is below -35°C (-30°F) .
* 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 risk, contact the nearest Noritz agent.

18
1. Close the gas valve.
2. (1) Turn the power on.
(2) Turn and leave open the hot water fixtures for more than 2 minutes and close.
* If multiple units are being used, drain two minutes for each unit.
* An 11 Error Code may appear on the operation panel.
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.
Do not touch with wet hands.
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.10 “Initial operation”, steps 1 through 4.
CAUTION
Preventing Damage from Freezing-2
Drain Plugs

19
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 operation panel;
deformation may occur.
• The operation panel is water resistant but not water proof. Keep it as dry as possible.
Regular Maintenance-1
Periodic Inspection
Check
For laundry, newspaper, timber,
oil, spray cans and other
combustible materials.
Equipment
Operation Panel
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 proper operation of
pressure relief valve.
Check
Check
Check
Check
Check
CAUTION
For dust and soot
in the flue terminal.
Be sure to do.
To prevent burns or scalding, turn off the power button and wait until the
equipment cools before performing maintenance.

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)
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 0.95L (0.2 gallon) 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)
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 water
drain valve (with water filter).
Optional Maintenance
*Isolation valves may be purchased as an
accessory from Noritz.
They allow for 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.
Isolation Valves
Water Supply
Valve
Inlet
Packing
Water drain valve
(with water filter)
Regular Maintenance-2
Water Intlet
Water Outlet
Drain
Hot Water
Service Valve
Pressure Relief Valve Cold Water
Service Valve