State Water Heaters 710 User manual

Gas Tankless Water Heater
710 / 710 ASME
(T-M32 / T-M32 ASME )Models
Suitable for potable water heating and space-heating *
*Please refer to local codes for space-heating compliance.
-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 electric 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.
710 / 710 ASME (T-M32/ T-M32 ASME)
On-Demand Water Heater
Installation Manual and Owner’s Guide
FEATURING
ENDLESS HOT WATER
ON-DEMAND USAGE
COMPACT, SPACE SAVING
ENERGY CONSERVATION
COMPUTERIZED SAFETY
NO PILOT LIGHT
EASY-LINK SYSTEM
If you have any questions, please
call or write to:
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Toll Free: 1-877-737-2840
For supplying potable
hot water
ASME model ONLY
ANSI Z21.10.3
and CSA 4.3
If the information in these
instructions is not followed
exactly, a fire or explosion
may result causing property
damage, personal injury or
death.
WARNING

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2
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CONTENTS
NOTE
*All references to the 710 (T-M32) also refer to the
710 ASME (T-M32 ASME) model.
*Check the rating plate to ensure this product
matches your specifications.
*In accordance with ANSI Z21.10.3,
CO emission does not exceed 400 PPM for
normal input.
SPECIFICATION
S
Natural Gas Input
(Operating Range)
Min: 24,000 Btu/h
Max: 240,000 Btu/h
Propane Input
(Operating Range)
Min: 24,000 Btu/h
Max: 240,000 Btu/h
Gas Connection 3/4” NPT
Water Connections
3/4” NPT
Water Pressure
15 - 150 psi *
Natural Gas
Inlet Pressure
Min. 5.0” WC
Max. 10.5” WC
Propane
Inlet Pressure
Min. 8.0” WC
Max. 14.0” WC
Manifold Pressure**
Natural: 2.35” WC
Propane: 3.55” WC
Weight
59 lbs.
Dimensions
H23.6”×W18.5”×D8.9”
Ignition
Electric Ignition
Electric
Supply
120 VAC / 60 Hz
Consumption
Operation 112 W
(0.93 A)
Standby 8.9 W
(0.07 A)
Freeze-
Protection 187 W
(1.56 A)
SPECIFICATIONS……………………….
INTRODUCTION…………………………
SAFETY GUIDELINES………………....
INSTALLATION…………………………..
General…………………………………
Included Accessories….…………
…….
Warning for Installations………………
Outdoor Installation…………………...
Indoor Installation…………………...…
Direct Intake Vent System…………….
Venting Instructions………………......
Gas Supply / Gas Pipe Sizing………..
Water Connections……………………
Pressure Relief Valve…………………
Electrical Connections……………......
Remote Controller Connections………
Pump Control Connections……………
Pump Control Mode……………………
Easy-Link System ……………………..
Multi-Unit System………………………
Initial Operation………………………..
NORMAL OPERATION………………….
Normal Operation…………………......
Flow……………………………………..
Freeze Protection System…………...
Temperature Settings………………….
Maintenance and Service………..…….
GENERAL TROUBLESHOOTING……..
OPERATING SAFETY……..……………..
APPLICATIONS
………………………......
Re-Circulation…………………………..
Dual-Purpose Heating……………......
ADDITIONAL CLEARNCES……………..
OPTIONAL ITEMS………...……………..
COMPONENTS DIAGRAM…………….
PARTS LIST………………………………
OUTPUT TEMPERATURE CHART……
LIMITED WARRANTY……………………
2
3
4
5
6
6
7
8
9
10
11
15
18
18
19
20
21
22
24
28
30
31
31
33
33
34
35
36
39
41
41
42
43
44
45
48
50
51
The manufacture
r
reserves the right to discontinue, or change at any time,
specifications or designs without notice and without incurring obligations.
*40 psi or above is recommended for maximum flow.
**The Manifold Pressure is the factory setting and
generally should not need adjustment.

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3
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INTRODUCTION
1. A hot water tap is turned on.
2. Water enters the heater.
3. The water flow sensor detects the water flow.
4. The computer automatically ignites the burner.
5. Water circulates through the heat exchanger and then gets hot.
6. The computer will modulate the gas supply valve and water flow to produce the right
amount of hot water at the correct temperature.
7. When the tap is turned off, the unit shuts down.
*This diagram illustrates
tankless water heater
design concepts only and is
not accurate to the water
heater’s physical
description.

This manual provides information necessary for the installation, operation, and
maintenanc
e of
the water heater
.

The model description is listed on the rating plate which is attached to the front cover of
the water heater.

Please read all installation instructions completely before installing this product.

If you have any problems or questions regarding this equipment, consult with the
manufacturer or
its
local representative.

This equipment is an on-demand, tankless water heater designed to efficiently supply
endless hot water for your
needs.

The principle behind the water heater is simple:

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4
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SAFETY GUIDELINES

Installation and service must be performed by a qualified installer (for
example, a licensed plumber or gas fitter), otherwise the warranty will be
void.
The installer (licensed professional) is responsible for the correct
installation of the water heater and for compliance with all national,
state/provincial, and local codes.
PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW ALL DIRECTIONS.
GENERAL
1. Follow all local codes, or in the absence of local codes, follow the most recent edition of
the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1
Natural Gas, Propane Installation Code in Canada.
2. Properly ground the unit in accordance with all local codes or in the absence of local codes,
with the National Electrical Codes: ANSI/NFPA 70 in the USA or CSA standard C22.1
Canada Electrical Code Part 1 in Canada.
3. Carefully plan where you intend to install the water heater. Please ensure:
Your water heater will have enough combustible air and proper ventilation.
Locate your heater where water leakage will not damage surrounding areas (please
refer to p. 5).
4. Check the rating plate for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE
and ELECTRIC RATING.
*If this unit does not match your requirements, do not install and consult with the
manufacturer.
5. If any problem should occur, turn off all hot water taps and turn off the gas. Then call a
trained technician or the Gas Company or the manufacturer.
WARNING
Water temperatures over 125ºF (52ºC) can cause severe burns instantly or death from
scalding. The water temperature is set at 120ºF (49ºC) from the factory to minimize
any scalding risk. Before bathing or showering always check the water temperature.
Do not store or use gasoline or other flammables, vapors, or liquids in
the vicinity of this appliance.
Do not reverse the water and/or gas connections as this will
damage the gas valves and can cause severe injury or death.
Follow the diagram on p. 17 when installing your water heater:
Do not use this appliance if any part has been in contact with or
been immersed in water. Immediately call a licensed plumber, a
licensed gas fitter, or a professional service technician to inspect
and/or service the unit if necessary.
Do not disconnect the electrical supply if the ambient temperature will drop below
freezing. The Freeze Prevention System only works if the unit has electrical power. The
warranty will not be covered if the heat exchanger is damaged due to freezing. Refer to
the section on the Freeze Prevention System on p. 33 for more information.
WARNING
Prohibited

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5
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INSTALLATION
All gas water heaters require careful and correct installation to ensure safe and efficient
operation. This manual must be followed exactly. Read the “Safety Guidelines” section at the
beginning of this manual.
The warranty will not cover damage caused by water quality. Water
hardness that leads to scale formation and/or corrosion may
affect/damage the water heater. Hard water scaling and/or corrosion must
be avoided or controlled by proper water treatment.
The manufacturer recommends using the direct-vent kit, when the
water heater is installed in a beauty salon. Some chemicals used in a
beauty salon may affect the flame sensor. Water heater may not work
properly.
Although this water heater is designed to operate with minimal sound, the
manufacturer does not recommend installing the unit on a wall
adjacent to a bedroom, or a room that is intended for quiet study or
meditation, etc.
Locate your heater close to a drain where water leakage will not do damage
to surrounding areas. As with any water heating appliance, the potential for
leakage at some time in the life of the product does exist. The manufacturer
will not be responsible for any water damage that may occur. If you install a
drain pan under the unit, ensure that it will not restrict the combustion air
flow.
The manufacturer does not recommend installing unit in an attic due
to safety issues. If you install your water heater in an attic:
Make sure your unit will have enough combustion air and proper
ventilation.
Keep the area around your water heater clean. When dust collects on
the flame sensor, the water heater will shut down on errors.
If the above conditions cannot be met, use the direct-vent conversion kit
9007668005 (TM-DV32).
Locate unit for easy access for service and maintenance.
A drain pan is required to be installed under the water heater in case of
leaks.
WARNING
CAUTION

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GENERAL
1. The manifold gas pressure is preset at the factory. It is computer controlled and should
not need adjustment.
2. Maintain proper space for servicing. Install the unit so that it can be connected or
removed easily. Refer to p. 8 and p. 9 for proper clearances.
3. The electrical connection requires a means of disconnection, to terminate power to the
water heater for servicing and safety purposes.
4. If you will be installing the unit in a contaminated area with a high level of dust, sand,
flour, aerosols or other contaminants/chemicals, they can become airborne and enter
and build up within the fan and burner causing damage to the unit. In those
environments (e.g. residential or commercial laundry facilities, hair salons, pet salons,
chemical plants etc.), please purchase the optional direct-vent conversion kit and
convert the water heater to a sealed combustion unit. Direct venting allows the water
heater to draw fresh intake air from the outside. The warranty will not cover damage
caused to the unit due to installation in a contaminated environment that has not been
converted using the direct-vent conversion kit.
5. Particles from flour, aerosols, and other contaminants may clog the air vent or reduce
the functions of the rotating fan and cause improper burning of the gas. Regularly ensure
that the area around the unit is dust- or debris-free; regular maintenance is
recommended for these types of environment.
6. Do not install the unit where the exhaust vent is pointing into any opening in a building or
where the noise may disturb your neighbors. Make sure the vent termination meets the
required distance by local code from any doorway or opening to prevent exhaust from
entering a building (refer to p. 14).
INCLUDED ACCESSORIES
Check that the installation manual, the communication cable, and the product registration card
are included with the unit.
Items
Manual
Communication Cable
Product Registration Card
Qty: 1
Qty: 1
Qty: 1

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WARNING FOR INSTALLATIONS
FOR YOUR SAFETY, READ BEFORE INSTALLATION:
Do not install the heater where water, debris
or flammable vapors may get into the flue
terminal. This may cause damage to the
heater and void the warranty.
Do not have the vent terminal pointing toward
any opening into a building. Do not locate
your heater in a pit or location where gas and
water can accumulate.
Do not install this water heater under an
overhang less than 3 feet from its top or
eaves. The area under an overhang must be
open to three sides.
Do not install the water heater vent terminator
within 1 ft. in the USA of any air intake or
building opening, and within 3 ft. in Canada of
any air intake or building opening. (Refer to
p.14)
Do not install next to a dryer or any source of
airborne debris that can be trapped inside the
combustion chamber, unless the system is
direct vented.
Prohibited Prohibited
3 Ft.

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8
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The dark square is the direction
the dipswitch should be set to.
1
2
3
4
5
6
7
8
TMP1
TMP2
TMP3
MODE
DIRE
OUT
D-PRT
MST
ON
Keep the clearances.
OUTDOOR INSTALLATION
1. Follow all local codes, or in the absence of local codes, follow the most recent edition of
the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1
Natural Gas, Propane Installation Code in Canada.
2. Install outdoors only in areas with mild, temperate climates.
3. Ensure that the unit is set for outdoor installation. Locate the left bank of dipswitches to
the bottom of the 7-Seg. LED on the computer board. The ‘OUT’ dipswitch on that
bank should be switched to its ‘ON’ (right) position (Do not adjust the right bank of
dipswitches).
4. The outdoor vent cap must be used when unit is installed outdoor. The manufacturer
requires the use of its part No. 9007676005 (TM-VC32).
5. When installed outdoors, the water heater shall be wall-mounted or mounted on a stand.
Locate the water heater in an open, unroofed area and maintain the following minimum
clearances:
Make sure power to the unit
is
turned OFF before changing
the dipswitch settings.
Left Bank of Dipswitches
7-Seg LED
L
eft bank of
dipswitches
Right bank of
dipswitches
There is a 2” clearance from the
left and right sides of the unit to
combustible and non-combustible
surfaces. However, if any portion
or area of the surface is exposed
to the exhaust fumes (i.e. directly
to the sides of the vent cap), that
surface must be at least 24”
away.
Bottom 12”
*Front 24”
Front 4”
(24” Recommended
for Maintenance)
Back
1
”
Side 2”
Side 2”
Top 36”
*Side 24”
*Side 24”

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9
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Keep the following
clearances.
INDOOR INSTALLATION
1. Follow all local codes, or in the absence of local
codes, follow the most recent edition of the
National Fuel Gas Code: ANSI Z223.1/NFPA 54
in the USA or CAN/CSA B149.1 Natural Gas,
Propane Installation Code in Canada.
2. When installed indoors, the water heater shall be
located in an area to maintain the following
minimum clearances around the unit:
Combustion Air Supply
The water heater location must provide enough air for proper combustion and ventilation of the
surrounding area. See the latest edition of ANSI Standard Z223.1 or any applicable local codes.
In general, these requirements specify that if the unit is installed in a confined space, there must
be a permanent air supply opening.
Minimum recommended air supply opening size for water heater:
Water heater size
When drawing make-up air from
outside the building
When drawing make-up air from inside
the building (from other rooms within)
MAX
240,000 BTU /h
16.0 Sq. IN 240 Sq. IN
When combustion air is supplied
from outside the building, an
opening communicating directly
with the outside should have a
minimum free area of one
square inch per 15,000 BTUH
input of the total input rating of
water heater in the enclosed
area.
When combustion air is supplied from
inside the building, an opening
communicating with the rest of the
dwelling should have a minimum free
area of one square inch per 1,000
BTUH input of the total input rating of
water heater in the enclosed area.
This opening should never be less
than 199 sq. in.
Combustible Air Supplied by Mechanical fan or Make up air device
The water heater is equipped with a combustible air sensor that will shut off the unit when
inadequate combustible air supply to unit is detected.
If a mechanical fan or make up air device is used to supply air to the water heater or
utility room, the installer should make sure it does not create drafts which could cause
nuisance shutdowns.
If a blower is necessary to provide adequate combustion air to the water heater, the
blower and water heater must be set up so that the water heater cannot fire unless the
blower is operating. Possible methods include the use of external flow
sensors/transmitters and relays.
Top 12”
Side 2”
Side 2”
Front 4”
(24” Recommended
for Maintenance)
Bottom 12”
Back 1”

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10
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The dark square is the direction
the dipswitch should be set to.
EXHAUST
INLET
1
2
3
4
5
6
7
8
TMP1
TMP2
TMP3
MODE
DIRE
OUT
D-PRT
MST
ON
DIRECT INTAKE VENT SYSTEM
This water heater may be converted to a direct-vent (sealed combustion) appliance by installing
an adapter (Part No. 9007668005 (TM-DV32)) which will bring all required combustible air from
outside the building. When installing the direct-vent conversion kit, please follow all instructions
included with the kit.
The water heater must be installed in a location where the proper amount of combustible
air will be available to it at all times without obstructions.
If used as a direct-vent appliance, the water heater requires a 4” combustible air supply
pipe. The intake pipe must be sealed airtight.
Air supply pipe can be made of ABS, PVC, galvanized steel, corrugated aluminum,
corrugated stainless steel or Category III stainless steel.
Change the dipswitch settings to the direct-vent system. (See diagram below)
Sidewall venting is recommended for the direct-vent system.
The manufacturer recommends running the exhaust vent and the intake pipe parallel.
The Direct-Vent Conversion Kit has an “INLET” mark as shown below. Do not
reverse the INLET and the EXHAUST connections when installing vent pipes.
Direct-Vent
Conversion Kit
Make sure power to the unit is
turned OFF before changing
the dipswitch settings.
Left Bank of Dipswitches
DIRECT
-
VENT
CONVERSION KIT
“INLET” mark
7-Seg LED
L
eft bank of
dipswitches
Right bank of
dipswitches