State Water Heaters Gas Water Heater Instruction manual

Printed in the U.S.A. 0604 PART NO. 184959-089
25,000 – 194,000 BTU Tankless Water Heater
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.
Owner’s Guide and Installation Manual
Thank you for purchasing this Gas Water Heater. Before using, please:
Read this manual completely for correct installation and operation
instructions.
Completely fill out the warranty registration card (included separately)
and mail the detachable portion.
Keep this manual (and the remainder of the warranty registration card)
where it can be found whenever necessary.
Low NOx
Approved by SCAQMD

2
Contents
Contents ........................................................................................................ 2
Owner's Guide
Important Safety Information....................................................................... 3
General Parts
Main Unit.................................................................................................... 7
(Optional) Remote Controller .................................................................. 8
Initial Operation ............................................................................................ 9
How to Use
Setting and Using the Water Heater........................................................ 10
Preventing Damage from Freezing ............................................................ 11
Regular Maintenance................................................................................... 13
Troubleshooting .......................................................................................... 15
Follow-up Service ........................................................................................ 19
Specifications .............................................................................................. 20
External outfitting ........................................................................................ 21
Combustion unit and gas route.................................................................. 23
Hot-water feed route.................................................................................... 25
Electronic control unit................................................................................. 27
Electronic control unit, Remote controller and Attached set.................. 28
Installation Manual ...................................................................................... 29
1. Included Accessories............................................................................ 30
2. Optional Accessories............................................................................ 30
3. Before Installation ................................................................................. 31
4. Choosing Installation Site .................................................................... 31
5. Installation Clearances ......................................................................... 33
6. Installation.............................................................................................. 34
7. Vent Pipe Installation (Indoor Installation Only)................................. 35
8. Gas Piping .............................................................................................. 37
9. Water Piping........................................................................................... 39
10. Plumbing Applications.......................................................................... 40
11. Electrical Wiring .................................................................................... 41
12. Maintenance ........................................................................................... 44
13. Trial Operation ....................................................................................... 44
14. Dimensions ............................................................................................ 46
Remote Controller Installation Guide ....................................................... 48

3
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 three
categories. Closely observe these warnings; they are critical to your safety.
Other icons
Danger
Warning
Caution
Denotes content that may result in instantaneous fire, serious injury
and even death when ignored.
Denotes content that may result in fire, serious injury and even
death when ignored.
Denotes content that may result in bodily injury and physical
damage when ignored.
The content following this icon is necessary to understand for safe
and easy use of this water heater.
Remarks
Be sure
to do. Ground.
Electric
Shock.
Danger
Do not use the water heater if
the exhaust pipe is displaced, has
holes, or is corroded.
If you detect a gas leak:
1. Do not try to light any appliance
2. Do not touch any electrical switch;
do not use any phone in your
building.
3. Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
4. If you cannot reach your gas
supplier, call the fire department.
Icons warning of risk level
Important Safety Information-1
Warning
Check the temperature
of the running hot water
before entering the
shower.
Check the temperature
before stepping into
the bath tub.
(Continued)
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 at the
main
4. Consult the nearest sales agent

4
Do not turn off the water heater or
change the water temperature while
someone is bathing.
Be sure the gas/power supplied
matches the gas on the rating
plate.
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to
bathe unsupervised.
Consult the nearest sales agent if
the water heater location needs to
be changed.
Contact a qualified service
technician for any necessary
repairs, service or maintenance.
Important Safety Information-2
Leave the proper clearance between
the water heater and nearby objects
(trees, timber, boxes with flammable
materials etc.).
Do not place or use a spray can
near the heater or the exhaust vent
terminal.
Left side:
Min. 2" Right side:
Min. 2"
Min. 3" from
vent pipe
Do not place combustibles such as
laundry, newspapers, oils etc. near
the heater or the exhaust vent
terminal.
Exhaust vent
terminal (indoor
installation)
*Indicates suggested clearances for
maintenance.
Front:
Sug. 24"*
[When installing indoors]
Check the air supply
vent for dust or
obstructions.
Do not use combustible chemicals
such as oil, gasoline, benzene etc.
in the vicinity of the heater or the
exhaust vent terminal.
Unit
(Continued)
Do not connect the water heater to
a solar water heater.
This can result in unreliable temperature
control, scalding or equipment failure.
For Natural Gas

5
Be sure to electrically ground the
unit.
Do not touch the power cord with
wet hands.
Keep power cord free of dust.
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 use the water heater for
other than hot water supply,
shower and bath.
Do not touch the exhaust vent pipe
during or immediately after
operation of the water heater.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
Do not install in salons or other
locations where hair spray or other
aerosols will be used.
Do not install in locations where
excessive dust or debris will be
in the air.
Caution

6
Important Safety Information-3
This unit is only approved for installation
up to 4500 ft. above sea level.
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 ( p.11)
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.12)
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.
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.
Do not use spring water or well water.
Do not use hard or acidic water.
These will void the warranty.
If scale forms and a descaling solution
must be used, the warranty will be void.
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, turn the fixture
all the way to the hot side, and adjust the
temperature from there.
Remark

7
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.14)
Pressure Relief Valve
General Parts

8
Display 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.
Setting Buttons
(Optional) Remote Controller (9004223)
* Before use, remove the protective sheet from the remote controller surface.
* The unit has been shipped from the factory with the remote control set at 110°F.

9
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

10
3
Mix for desired temperature.
The factory temperature setting is 120°F (fixed). Mix with cold water with a mixing valve
or at the fixture for desired temperature.
To prevent scalding.
Check the temperature of the running hot
water before using. Temperatures above
125°F can scald instantly.
1Check that electrical power is connected.
2
4
How to Use (For N-063S)
Setting and Using the Water Heater
Temperature
If you want to the temperature to be changed to 130°F or 140°F, contact the installer or sales agent.
Turn on hot water.
Turn off the hot water.
WARNING
High Temperature
The electrical power does not need to
be disconnected between uses.
Hot water
Water
scalding.scalding.