Noritz N-0841MC, N-0841MC-DV Owner's Manual
CONDENSING TANKLESS GAS WATER HEATER
Owner’s Guide
Model N-0841MC
N-0841MC-DV
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.
Thank you for purchasing this Noritz Condensing Tankless Gas Water Heater.
Before using, please:
Read this manual completely for operation instructions.
CERTIFIED
R
Low NOx
Approved by
SCAQMD
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.
NORITZ America Corporation
SAR8736-1
Rev. 03/08
*SAR8736 T*
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
2. In approved containers.
3. Tightly closed.
4. Out of children’s reach.
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.
heater.
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
[N-0841MC only]
Do not use the water heater
if the exhaust pipe
is displaced,
has holes, is clogged
or is corroded.
[N-0841MC-DV only]
Do not use the water
heater if the
intake/exhaust pipe
is displaced,
has
holes, is clogged
or is corroded.
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 or after replacing the neu-
Be sure
tralizer with a new unit, make sure that
to do.
you fill the neutralizer unit with water.
This is to prevent dangerous exhaust
gases from entering the building.
Failure to fill the neutralizer unit could
result in severe personal injury or death.
(Refer to page 20 for further instructions.)
WARNING
A. This water heater does not have a
pilot. It is equipped with an
ignition device that automatically
No flame.
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
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
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
199,900
186,000
3.6
3.6
192,700
179,300
(Continued)
Prohibited
Prohibited
Prohibited
Prohibited
Do not place the exhaust vent terminal
in an indoor environment by means of
adding walls and ceiling (Do not enclose using corrugated sheets, etc.)
Exhaust vent
terminal
Flue
terminal
Unit
Carbon monoxide poisoning or fire may
occur as a result.
[N-0841MC-DV only]
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.
Outdoor
Carbon Monoxide Poisoning Hazard. Do
not install this water heater in a mobile
home, recreation vehicle or on a boat.
Do not use combustible chemicals such
as oil, gasoline, benzene etc. in the near
the heater or the exhaust vent terminal.
Be sure
Be sure
to do.
Leave the proper clearance between the
water heater and nearby objects (trees,
timber, boxes with flammable materials etc.).
to do.
[When installing outdoors (N-0841MC only)]
Upper:
Left side:
Min. 6"
Front:
Sug. 24"
[When installing indoors (N-0841MC only)]
Upper:
Left side:
Min. 6"
Front:
Sug. 24"
[When installing indoors (N-0841MC-DV only)]
Left side:
Min. 6"
Front:
Sug. 24"
Indicates suggested clearances for maintenance.
*
Be sure the gas/power
supplied matches the
gas on the rating plate.
For Natural Gas
Min. 36"
Min. 12"
*
Upper:
Min. 12"
*
Right side:
Min. 6"
Sug. 3" from
vent pipe
Right side:
Min. 6"
Sug.3" from
vent pipe*
Right side:
Min. 6"
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
near the water heater or the exhaust
Prohibited
vent terminal.
Do not place combustibles such as
laundry, newspapers, oils etc. near
Prohibited
the heater or the exhaust vent
terminal.
Flue
terminal
Exhaust vent terminal
(indoor installation)
4
Unit
Be sure
to do.
Be sure
to do.
N-0841MC
199,900 BTU
11,000 BTU
2004
2004
222
4.0
0.85 3.05"
15 150
840
10.5"
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
[When installing indoors
(N-0841MC only)]
Check the air supply
vent for dust or
obstructions.
air supply
vent
(Continued)
(Continued)
Prohibited
Prohibited
Prohibited
Don’t touch
with a wet
hand.
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.
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.
Consult the nearest Noritz agent if
the water heater location needs to
Be sure
be changed.
to do.
Contact a qualified service
technician for any necessary
repairs, service or maintenance.
Don’t
disassemble
the equipment.
Contact Noritz before using with
a solar pre-heater.
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.
Ground.
Be sure
to do.
Prohibited
Prohibited
Be sure
to do.
Prohibited
CAUTION
Be sure to electrically ground the
unit.
Keep power cord free of dust.
Do not use the water heater for
other than hot water supply, shower
and bath.
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.
To prevent burns or scalding, turn
off the power button and wait until
the equipment cools before performing maintenance.
Do not turn off the water heater
while someone is bathing.
Prohibited
Prohibited
Don’t
touch.
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 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
the water heater.
(N-0841MC)
(N-0841MC-DV)
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.
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
after use.
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.
Take necessary measures to prevent
freezing of water and leakage of gas when
leaving the unit unused for long periods of
time. (
p.19)
p.18)
This unit is only approved for installation
up to 4500 ft. above sea level.
For installations at higher elevations, contact Noritz
America for Instructions.
6
If it is snowing, check the air inlet, exhaust
gas vent and exhaust vent terminal for
blockage.
Do not use parts other than those specified
for this equipment.
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 ........................................................................................ 27
Specifications .............................................................................................. 28
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
Condensing
Exhaust Exhaust
About 400°F
Combustion gas
About 400°F
First heat exchanger
Gas
Hot water
Tankless Gas
Water Heater
Cold water
About 120°F
Secondary heat exchanger
Combustion gas
About 400°F
First heat exchanger
Gas
Water is heated
using the exhaust
gas which is about
400°F
Neutralizer
Condensate
Hot water
.
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 (GPH) maximum). It is not a
water leak. Do not plug or block the drain line
as it must always be allowed to freely flow.
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
Indoor/Outdoor Wall Mounted, Power Vented Model
Flue Collar
Front Cover
Air Inlet
Water Drain Valve (with Water Filter)
(Inside Water Inlet) (
Pressure Relief Valve
Water Supply Valve
Drain Pipe
Discharges the
condensate.
Gas Supply Valve
* The above illustration shows an example of installation.
The exact installation configuration may be slightly different.
N-0841MC-DV
Indoor Wall Mounted,
Power Vent/Sealed Model
p.22)
(Ex. N-0841MC)
Intake pipe
Flue Collar
9
Loading...