Noritz ecoTough NRC98-DV, ecoTough NRC98-OD, ecoTough NRC83-DV, ecoTough NRC83-OD Owner's Manual
TANKLESS GAS WATER HEATER
Owner’s Guide
Models : NRC98-DV
NRC98-OD
NRC83-DV
NRC83-OD
FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS.
If the information in this manual is not followed exactly, a fire or explosion
WARNING
- 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.
may result causing property damage, personal injury, or death.
- Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
Thank you for purchasing this Noritz Tankless Gas Water Heater.
CERTIFIED
Low NOx
Approved by
SCAQMD
Before using, please:
R
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.
NORITZ America Corporation
SBA8833
Rev. 07/11
*SBA8833*
Important Safety Information-1
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.
Icons warning of risk level
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.
DANGER indicates an imminently hazardous situation which,
DANGER
WARNING
CAUTION
CAUTION
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.
Other icons
Electric
Shock.
Prohibited
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
Prohibited
Prohibited
adhesives in the same room or area near the water heater.
Keep flammable products:
1. Far away from the water
heater.
2. In approved containers.
3. Tightly closed.
4. Out of children’s reach.
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.
High
Temperature.
No flame.
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.
Be sure
to do.
Don’t
touch.
DANGER
Ground.
Don’t
disassemble
the equipment.
Don’t touch
with a wet
hand.
2
(Continued)
(Continued)
Prohibited
Prohibited
[NRC98-DV, NRC83-DV]
Do not use the water
heater if the intake/
exhaust pipe is
displaced, has holes, is
clogged or is corroded.
[NRC98-OD, NRC83-OD]
Do Not Install Indoors.
This will cause carbon
monoxide poisoning and
a potential fire hazard.
Do not allow anyone to change the water
temperature while hot water is being used.
Prohibited
To prevent scalding, do not change the water temperature to a higher setting.
After the water heater has been out of
use for a long time make sure that you
Be sure
to do.
fill the condensate trap with water.
This is to prevent dangerous exhaust
gases from entering the building.
Failure to fill the condensate trap could
Indoor
result in severe personal injury or death.
(Refer to page 20 for further instructions.)
WARNING
No flame.
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.
Be sure
to do.
Be sure
to do.
Prohibited
High
Temperature.
When a gas leak is noticed:
1. Stop use immediately
2. Close the gas valve
[NRC98-DV, NRC83-DV]
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
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
Check the temperature
of the running hot water
before entering the
shower.
Check the temperature
before stepping into
the bath tub.
(Continued)
3
Important Safety Information-2
(Continued)
WARNING
Do not place the exhaust vent terminal
in an indoor environment by means of
Prohibited
adding walls and ceiling (Do not enclose using corrugated sheets, etc.)
Carbon monoxide poisoning or fire may
occur as a result.
[NRC98-DV, NRC83-DV]
Do not place outdoors
Prohibited
Rain may enter the unit
or the burner fire may be
blown by the wind, causing malfunction or fire as a
result.
Leave the proper clearance between
the water heater and nearby objects
Be sure
to do.
(trees, timber, boxes with flammable
materials etc.).
[NRC98-DV, NRC83-DV]
Upper:
Min. 12" (300mm)
Exhaust vent
terminal
Unit
Outdoor
Sug.3" (75mm)
from vent pipe*
Do not place combustibles such as
laundry, newspapers, oils etc. near the
Prohibited
heater or the exhaust vent terminal.
Exhaust vent
terminal
Unit
Do not use combustible chemicals
such as oil, gasoline, benzene etc.
Prohibited
in the near the heater or the exhaust
vent terminal.
Do not store or use gasoline or other
flammable vapors and liquids in the
Prohibited
vicinity of this or any other appliance.
Do not place or use a spray can
the water heater or the exhaust vent
Prohibited
terminal.
Be sure the gas/power
supplied matches the
Be sure
gas on the rating plate.
to do.
Ex. For Natural Gas (NRC98-DV)
near
Left side:
Min. 2" (50mm)
Front:
Sug. 24" (600mm)
*
[NRC98-OD, NRC83-OD]
Upper:
Min. 36" (900mm)
Left side:
Min. 6" (150mm)
Front:
Sug. 24" (600mm)
Indicates suggested clearances for maintenance.
*
*
Carbon Monoxide Poisoning Hazard.
Do not install this water heater in a
Prohibited
recreation vehicle or on a boat.
4
Right side:
Min. 2" (50mm)
Right side:
Min. 6" (150mm)
Be sure
to do.
Prohibited
Prohibited
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
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.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
(Continued)
(Continued)
Prohibited
Don’t touch
with a wet
hand.
Be sure
to do.
Don’t
disassemble
the equipment.
Be sure
to do.
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to bath unsupervised.
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.
The gas conversion kit shall be installed by a
Electric
Shock.
Do not touch the power
cord with wet hands.
qualified service agency in accordance with
Consult the nearest Noritz agent if
the water heater location needs to
be changed.
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
Contact a qualified service
technician for any necessary
repairs, service or maintenance.
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
Contact Noritz before using with
a solar pre-heater.
the converted appliance is checked as
specified in the manufacturer’s instructions
supplied with the kit.
Be sure to electrically ground the
unit.
Ground.
Keep power cord free of dust.
Be sure
to do.
Do not use the water heater for
other than hot water supply, shower
Prohibited
and bath.
Do not use a broken or modified power cord.
Do not bind, bend or stretch power cords.
Prohibited
Do not scratch, modify, or subject them to
impact or force.
To prevent burns or scalding, turn off the
power button and wait until the equipment
Be sure
to do.
cools before performing maintenance.
Do not turn off the water heater
while someone is bathing.
Prohibited
CAUTION
Do not cover the water heater and
the exhaust vent terminal, store trash
Prohibited
Prohibited
Prohibited
or debris near it, or in any way block
the flow of fresh air to the unit.
Do not install in locations where
excessive dust or debris will be
in the air.
Do not touch the exhaust vent pipe
and exhaust vent terminal during
or immediately after operation of
Don’t
touch.
the water heater.
[NRC98-DV, NRC83-DV] [NRC98-OD, NRC83-OD]
Do not use condensate, discharged
from the drain pipe, for drinking or
for consumption by animals.
5
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.
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.
Problems resulting from scale formation
are not covered by the warranty.
Check ignition during use and extinction
after use.
This unit is only approved for installation
up to 4500 ft. (1350m) above sea level.
For installations at higher elevations, contact Noritz
America for Instructions.
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.
Preventing damage from freezing (
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.
p.18)
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.
6
Take necessary measures to prevent
freezing of water and leakage of gas when
leaving the unit unused for long periods of
time. (
If it is snowing, check the exhaust vent
terminal for blockage.
Do not use parts other than those specified
for this equipment.
p.19)
Contents
Important Safety Information ....................................................................... 2
Contents......................................................................................................... 7
Overview of Condensing Tankless Gas Water Heater .............................. 8
General Parts
Main Unit .................................................................................................... 9
Remote Controller .................................................................................... 10
Initial Operation ............................................................................................ 11
How to Use
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 ................................................................................... 21
Troubleshooting ........................................................................................... 23
Follow-up Service ........................................................................................ 28
Specifications ............................................................................................... 30
7
Overview of Condensing Tankless Gas Water Heater
This water heater is a high efficiency, fully condensing appliance. Unlike a traditional tankless water
heater, a condensing type captures heat from the exhaust gas and uses it to preheat the incoming
cold water as it passes through the secondary heat exchanger as illustrated below.
Conventional
type
Cold water
Exhaust Exhaust
About
400˚F (200˚C)
Combustion gas
About
400˚F (200˚C)
Primary heat exchanger
Gas
Hot water
Condensing
Tankless Gas
Water Heater
Cold water
120˚F (49˚C)
Secondary heat exchanger
Combustion gas
Primary heat exchanger
About
About
400˚F (200˚C)
Gas
Hot water
Water is heated
using the exhaust
gas which is about
400˚F (200˚C)
condensate trap
Condensate
.
The condensing tankless gas water
heater discharges condensate.
When heat from the exhaust gas is collected within
the secondary heat exchanger, condensation occurs
from moisture in the exhaust gas and the resulting
water is discharged from the drain pipe (approx.
2 gallons/hour (7.5 liters/hour) maximum). It is not a
water leak. Do not plug or block the drain line as it
must always be allowed to freely flow.
Note : The condensate discharged is acidic with a pH
level of approximately 2-3.
A condensate neutralizer may be required by
local code prior to disposal.
The condensing tankless gas
water heater tends to show
white steam.
After the exhaust gas passes through the
secondary heat exchanger, it becomes low in
temperature and moisture rich which tends to
produce steam at the vent discharge terminal.
This is a normal occurrence.
Drain pipe
(Installation example)
Condensate
comes out from
here.
During combustion, white
steam may often be seen.
This is normal.
8
General Parts -1
Main Unit
[NRC98-DV, NRC83-DV]
Indoor Wall Mounted, Power Vent/Sealed Model
Intake Pipe
Flue Collar
Front Cover
Water Drain Valve
(with Water Filter)
(Inside Water Inlet)
(
p.22)
Pressure Relief Valve
Water Supply Valve
Gas Supply Valve
Drain Pipe
Discharges the
condensate.
[NRC98-OD, NRC83-OD]
Outdoor Wall Mounted, Power Vented Model
Exhaust Vent
* The above illustration shows an example of installation.
The exact installation configuration may be slightly different.
9
General Parts -2
Remote Controller (RC-7651M)
What is actually displayed depends on how the water heater is set.
Burner On Indicator
When burning, the
indicator is lit.
(
Priority Indicator
When this indicator is lit,
the hot water temperature
can be set. (
Temperature Setting
Flow Meter Setting
The display will flash
after hitting the flow
meter alarm set button.
A number will flash if
a failure occurs.
p.13 and 15)
(Ex.:110°F)
( p.15)
Error Code
(
p.26 - 27)
p.12)
Setting Buttons
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)
* Before use, remove the protective sheet from the remote controller surface.
Note: As shipped from the factory, the remote controller is set to display in °F and gallons.
To adjust the display to °C and liters, refer to the Installation Manual.
10
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