Noritz NR71-SV User manual

SBA8344
Rev. 09/09
Models: NR71-SV
NR71-OD*
NR66-SV
NR66-OD*
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
*SBA8344*
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 Construc-
tion and Safety Standard, Title 24 CFR, Part 3280 or the Canadian Standard CAN/
CSA-Z240 MH Mobile Homes, Series M86.(NR71-OD, NR66-OD only)
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.
Low NOx
Approved by
SCAQMD
CERTIFIED
R
Accepted For Use
City of New York
Department of Buildings
MEA 19-03-E

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 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)
[NR71-SV, NR66-SV]
Do not use the water heater if
the exhaust pipe is displaced,
has holes, is
clogged or
is corroded.
Prohibited
WARNING
Be sure
to do.
When a gas leak is noticed:
1. Stop use immediately
2. Close the gas valve
3. [When installing indoors]
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 water temperature to a higher setting.
Prohibited
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 result
in fire or explosion, and personal injury or
death
Prohibited
(Continued)
Prohibited
[NR71-OD, NR66-OD]
Do Not Install Indoors.
This will cause carbon
monoxide poisoning and
a potential fire hazard.
Indoor
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.

4
Important Safety Information-2
(Continued)
air supply
vent
[When installing indoors
(NR71-SV, NR66-SV)]
Check the air supply
vent for dust or
obstructions.
Be sure
to do.
Be sure the gas/power
supplied matches the
gas on the rating plate.
Ex. For Natural Gas NR71-SV
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)
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.
Do not place the exhaust vent terminal
in an indoor environment by means of
adding walls and ceiling (Do not en-
close using corrugated sheets, etc.)
Carbon monoxide poisoning or fire may
occur as a result.
Exhaust
vent terminal
Outdoor Unit
Prohibited
Do not place combustibles such as
laundry, newspapers, oils etc. near the
heater or the exhaust vent terminal.
Prohibited
Do not use combustible chemicals such
as oil, gasoline, benzene etc. in the near
the heater or the exhaust vent terminal.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Prohibited
Prohibited
Do not place or use a spray can
near the heater or the exhaust vent
terminal.
Prohibited
Left side:
Min. 6" Right side:
Min. 6"
Front:
Sug. 24"
Upper: Min. 36"
[When installing indoors (NR71-SV, NR66-SV)]
[When installing outdoors]
180,000 BTU
25,000 BTU 177 4.0
0.55 2.25
10.5
670
15 150
2
NR71-SV
Left side: Min. 2" Right side:
Min. 2"
Upper:
Min. 12"
Front: Sug. 24"*
Sug. 3" from
vent pipe
[NR71-SV, NR66-SV only]
Carbon Monoxide Poisoning Hazard. Do
not install this water heater in a mobile
home, recreation vehicle or on a boat.
Prohibited
Prohibited
[NR71-OD, NR66-OD only]
Carbon Monoxide Poisoning Hazard.
Do not install this water heater in a
recreational vehicle or on a boat.
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 seperate area that is
supplied with fresh air from outdoors.
Prohibited
WARNING
Exhaust vent terminal
(indoor installation)
Unit

5
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
(Continued)
Prohibited
Do not cover the water heater and
the exhaust vent 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 exhaust vent (pipe,
terminal) 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.
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to
bathe unsupervised.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
Do not touch the power
cord with wet hands.
Prohibited
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.
To prevent burns or scalding, turn
off the power button or power supply
and wait until the equipment cools
before performing 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.
Preventing damage from freezing ( p.18)
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.
This unit is only approved for installation
up to 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.
Take necessary measures to prevent
freezing of water and leakage of gas when
leaving the unit unused for long periods of
time. ( p.19)
Do not use parts other than those specified
for this equipment.
If it is snowing, check the air inlet, exhaust
gas vent and exhaust vent terminal for
blockage.
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.
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.

7
Important Safety Information....................................................................... 2
Contents ........................................................................................................ 7
General Parts
Main Unit.................................................................................................... 8
Remote Controller .................................................................................... 9
Initial Operation ........................................................................................... 10
How to Use (Not using the remote controller)
Setting and Using the Water Heater........................................................ 11
How to Use (Using the remote controller)
Setting and Using the Water Heater........................................................ 12
Flow Meter Alarm ...................................................................................... 14
Muting the Remote Controller ................................................................. 16
Adjusting the Maximum Output Temperature........................................ 17
Preventing Damage from Freezing ............................................................ 18
Regular Maintenance................................................................................... 20
Troubleshooting .......................................................................................... 22
Follow-up Service ........................................................................................ 27
Specifications .............................................................................................. 29
Contents

8
NR71-SV, NR66-SV
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 Drain Valve (with Water Filter)
(Inside Water Inlet) (p.21)
Pressure Relief Valve
General Parts
NR71-OD, NR66-OD
Outdoor Wall Mounted, Power Vented Model
Exhaust Vent
Front Cover
Air Inlet
Water Supply Valve
Gas Supply Valve
Water Drain Valve (with Water Filter)
(Inside Water Inlet) (p.21)
Pressure Relief Valve
(Ex. NR71-SV)
(Ex. NR71-OD)

9
Remote Controller (RC-7649M) <Optional>
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 remote controller surface.
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.12)
The illustration below shows the remote controller display. What is actually displayed
depends on how the water heater is set.
A number will flash if
a failure occurs.
(p.26)
Priority Indicator
Burner On Indicator
When burning, the
indicator is lit.
( p.13 and 15)

10
(Ex. NR71-SV)
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.