Noritz NC1991-OD User manual

SBA8883-1
Rev. 03/13
Models : NC1991-OD
NC1991-DVC
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
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.
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 COMMERCIALAPPLICATIONS.
CERTIFIED
R
*SBA8883*
Low NOx Approved
by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)

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 (52°C) 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
(Continued)
No flame.
(Continued)
WARNING
Be sure
to do.
When a gas leak is noticed:
1. Stop use immediately.
2. Close the gas valve.
[NC1991-DVC]
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
water 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.
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
Prohibited
[NC1991-OD]
Do Not Install Indoors.
This will cause carbon
monoxide poisoning and
a potential fire hazard. Indoor
Prohibited
[NC1991-DVC]
Do not use the
water heater if the
concentric pipe is
displaced, has holes,
is clogged or is
corroded.

4
Important Safety Information-2
(Continued)
Do not place the unit or the flue terminal
in an indoor 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.
(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.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
Be sure
to do.
Be sure
to do.
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 allow small children to play
unsupervised in the bathroom.
Do not allow small children to bath
unsupervised.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
Prohibited
Prohibited
Prohibited
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 combustibles such as
laundry, newspapers, oils etc. near
the heater
or the flue terminal.
Prohibited
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 mobile
home, recreational vehicle or on a boat.
Prohibited
WARNING
Unit
Left side:
Min. 6" (150mm) Right side:
Min. 6" (150mm)
Upper:
Min. 36" (900mm)
Front:
Sug. 24" (600mm)*
Unit
Ex. For Natural Gas (NC1991-OD)
[NC1991-DVC]
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
Left side:
Min. 2" (50mm) Right side:
Min. 2" (50mm)
Front:
Sug. 24" (600mm)*
Sug. 3" (75mm)
from concentric
pipe*
Upper: Min.
12" (300mm)
[NC1991-OD]
[NC1991-DVC]
Flue terminal
Flue terminal

5
(Continued) Do not touch the power
cord with wet hands.
Electric
Shock.
Don’t touch
with a wet
hand.
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 exhaust vent or
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.
[NC1991-OD] [NC1991-DVC]