A.O. Smith ATI-140H-P Technical Documents

A.O. Smith ATI-140H-P Technical Documents
On-Demand Water Heater
Installation Manual and Owner’s Guide
ANSI Z21.10.3 and CSA 4.3
Models
• 140 Indoor (T-H3M-DV)
• 140 Outdoor (T-H3M-OS)
If the information in these
instructions is not followed
exactly, a fire or explosion may
result causing property damage,
WARNING personal injury or death.
Gas Tankless Water HeaterTM
Suitable for potable water heating and space-heating
Please refer to local codes for space-heating compliance.
•
•
•
•
•
•
•
FEATURING
ENDLESS HOT WATER
ON-DEMAND USAGE
COMPACT, SPACE SAVING
ENERGY CONSERVATION
COMPUTERIZED SAFETY
NO PILOT LIGHT
Satisfies the 2012 SCAQMD Rule
1146.2 for Ultra-Low NOx Emissions
-- 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.
If you have any questions, please
call or write to:
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Toll Free: 1-877-737-2840
Installation Manual
Contents
CONTENTS
Installation Manual
SPECIFICATIONS�������������������������������������������������������������������������������������������������������������������������������� 4
INTRODUCTION�������������������������������������������������������������������������������������������������������������������������������� 5
SAFETY GUIDELINES�������������������������������������������������������������������������������������������������������������������������� 6
INSTALLATION������������������������������������������������������������������������������������������������������������������������������������ 7
General������������������������������������������������������������������������������������������������������������������������������������������ 7
Included accessories�������������������������������������������������������������������������������������������������������������������� 9
Clearances�������������������������������������������������������������������������������������������������������������������������������������� 9
Venting instructions�������������������������������������������������������������������������������������������������������������������� 10
Gas supply and gas pipe sizing�������������������������������������������������������������������������������������������������� 20
Water connections���������������������������������������������������������������������������������������������������������������������� 22
Condensate drain������������������������������������������������������������������������������������������������������������������������ 23
Electrical connections���������������������������������������������������������������������������������������������������������������� 25
Temperature remote controller ������������������������������������������������������������������������������������������������ 26
High-altitude installations���������������������������������������������������������������������������������������������������������� 28
APPLICATIONS �������������������������������������������������������������������������������������������������������������������������������� 29
INITIAL OPERATION������������������������������������������������������������������������������������������������������������������������ 31
OPTIONAL ITEMS���������������������������������������������������������������������������������������������������������������������������� 32
Owner's Guide
OPERATING SAFETY������������������������������������������������������������������������������������������������������������������������ 35
NORMAL OPERATION �������������������������������������������������������������������������������������������������������������������� 37
Display of controller�������������������������������������������������������������������������������������������������������������������� 37
General���������������������������������������������������������������������������������������������������������������������������������������� 37
Temperature table of controller������������������������������������������������������������������������������������������������ 37
Temperature settings������������������������������������������������������������������������������������������������������������������ 38
Additional features �������������������������������������������������������������������������������������������������������������������� 39
Flow���������������������������������������������������������������������������������������������������������������������������������������������� 40
Freeze protection system ���������������������������������������������������������������������������������������������������������� 40
Maintenance and service ���������������������������������������������������������������������������������������������������������� 41
Unit draining and filter cleaning������������������������������������������������������������������������������������������������ 41
Descaling the unit ���������������������������������������������������������������������������������������������������������������������� 42
TROUBLESHOOTING������������������������������������������������������������������������������������������������������������������������ 43
General���������������������������������������������������������������������������������������������������������������������������������������� 43
Error codes���������������������������������������������������������������������������������������������������������������������������������� 45
COMPONENTS DIAGRAM�������������������������������������������������������������������������������������������������������������� 48
PARTS LIST �������������������������������������������������������������������������������������������������������������������������������������� 52
OUTPUT TEMPERATURE CHART���������������������������������������������������������������������������������������������������� 54
LIMITED WARRANTY���������������������������������������������������������������������������������������������������������������������� 55
NOTICE
• This installation manual is approved for installation in the United States.
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Installation Manual
Installation Manual
CONGRATULATIONS
Congratulations and thank you for choosing our tankless water heater.
Before use, we recommend that you read through this safety manual
carefully. Please refer to the back of the manual for details about the
warranty. Keep this manual for future reference.
If you lose the manual, contact the manufacturer or your local
distributor. When you call, please tell us the model number and the
serial number of your unit written on the rating plate of the water
heater.
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Installation Manual
Specifications
SPECIFICATIONS
140
Indoor
Model
140
Outdoor
(T-H3M-DV)
(T-H3M-OS)
Natural Gas Input
(Operating Range)
BTU/h
Min.: 15,000
Max.: 120,000
Propane Input
(Operating Range)
BTU/h
Min.: 15,000
Max.: 120,000
Gas Connection
1/2" NPT
Water Connection
3/4" NPT
Water Pressure*
Natural gas
Inlet Pressure
Propane
Inlet Pressure
Manifold
Pressure**
Natural
Gas
Propane
Weight
psi
(MPa)
inch W.C.
(kPa)
inch W.C.
(kPa)
inch W.C.
(Pa)
3.30
(820)
2.00
(500)
inch W.C.
(Pa)
3.00
(750)
1.60
(400)
lbs. (kg)
58 (22.5)
58 (22.5)
15 - 150 (0.1 - 1.0)
Min. 5.0 (1.2)
Max. 10.5 (2.6)
Min. 8.0 (2.0)
Max. 14.0 (3.5)
inch
Dimension
H 21-3/4 x W 14 x D 9-1/4
H 552 x W 352 x D 236
mm
Ignition
Electric Ignition
VAC / Hz
120 / 60
Operation
W/A
53.9 / 0.7
Standby
W/A
3.2 / 0.05
FreezeProtection
W/A
223.9 / 1.94
Consumption
Electric
Supply
*40 psi (0.27 MPa) or above is recommended for maximum flow.
**The Manifold Pressure is the factory setting and should not need adjustment.
NOTE:
• 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.
• The manufacturer reserves the right to discontinue, or change at any time, specifications or designs
without notice and without incurring obligation.
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Installation Manual
Introduction
INTRODUCTION
• This manual provides information necessary for the installation, operation, and maintenance
of the water heater.
• The model description is listed on the rating plate which is attached to the side panel 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 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.
• These high efficiency models have a built-in secondary heat exchanger that absorbs latent
heat from the exhaust gas.
• The 140 Indoor (T-H3M-DV) model is only to be installed indoors. The 140 Outdoor (T-H3MOS) model is only to be installed outdoors.
• The principle behind tankless water heaters is simple:
Exhaust
Secondary
heat exchanger
Intake port
Exhaust
Thermistor
Primary
heat exchanger
Burners
Water control
valve
Gas valve
Computer
board
Fan motor
Flow sensor
Thermistor
Hot water outlet
Igniter
Condensate
drain port
Gas inlet
Cold water inlet
Thermistor
*This diagram illustrates tankless water heater design concepts only and does not accurately
represent the water heater’s physical description.
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 initiates the fan motor and sends a signal to the igniter to create an ignition
spark.
5. The gas ignites and flames appear within the burner chamber.
6. Water circulates through the heat exchanger and then gets hot.
7. Using thermistors to measure temperatures throughout the water heater, the computer
modulates the gas and water valves to ensure proper output water temperature.
8. When the tap is turned off, the unit shuts down.
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Installation Manual
Safety Guidelines
SAFETY GUIDELINES
SAFETY DEFINITION
DANGER
WARNING
CAUTION
Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
Indicates an imminently hazardous situation which, if not avoided, could result
in death or serious injury.
Indicates an imminently hazardous situation which, if not avoided, could result
in minor or moderate injury.
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 water heater 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. 8).
4. Check the rating plate for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE and ELECTRIC
RATING.
*If this water heater 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.
• Water temperatures over 125 °F (52 °C) can cause severe burns instantly or
death from scalding. The water temperature is set at 120 °F (49 °C) from the
factory to minimize any scalding risk. Before bathing or showering always
check the water temperature.
WARNING
• 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. 22
when installing your water heater.
• Do not use this water heater 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 water heater
if necessary.
• Do not disconnect the electrical supply if the ambient temperature will drop
below freezing. The Freeze Protection System only works if the water heater
has electrical power. The heat exchanger will not be covered under warranty
if it is damaged due to freezing. Refer to the section on the Freeze Protection
System on p. 40 for more information.
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Installation Manual
Installation
INSTALLATION
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. 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.
3. The manifold gas pressure is preset at the factory. It is computer controlled and should not need
adjustment.
4. Maintain proper space for servicing. Install the water heater so that it can be connected or removed
easily. Refer to the "Clearances" section on p. 9 for proper clearances.
5. 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.
6. The electrical connection requires a means of disconnection, to terminate power to the water heater
for servicing and safety purposes.
7. Do not install the water heater 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. 17 to 19).
8. Particles from flour, aerosols, clothes dryers and other airborne contaminants may clog the air vent,
build up and reduce the functions of the rotating fan, cause improper burning of the gas, or cause
damage to the water heater. Regularly ensure that the area around the water heater is dust- or debrisfree. Regular maintenance is recommended for these types of environments. Sealed combustion is
recommended too.
9. The 140 Indoor (T-H3M-DV) model is to be installed indoors only. The model is equipped with a
thermistor and hi-limit switch for the exhaust gas, detecting excess temperatures within the flue and
enabling the water heater to safely stop operation if needed. These components are always monitoring
exhaust gas conditions in order to prevent heat damage to ABS, PVC, CPVC, or Polypropylene (Plastic)
venting if ABS, PVC, CPVC, or Polypropylene is used. If the exhaust gas temperature exceeds 140 °F
(60 °C) these components will enable the water heater to safely stop operation. (These components
are not installed on the outdoor model since the exhaust vent is built-in.)
• The Indoor model requires 3 inch, or 4 inch diameter intake air supply pipe. The intake pipe must
be sealed airtight.
• Air supply pipe can be made of aluminum flexible tube, ABS, PVC, CPVC, Polypropylene,
corrugated stainless steel, or Category lll / IV stainless steel. Regarding exhaust pipe, please refer
to p.11 for detailed information.
• Sidewall venting is recommended for the Indoor model. Vertical venting (roof termination) is
acceptable.
• The manufacturer recommends running the exhaust vent and the intake pipe as parallel as possible.
10. The 140 Outdoor (T-H3M-OS) model is only to be installed outdoors and only in the area with mild,
temperate climates.
The Outdoor model shall be wall-mounted or mounted on a stand. Locate the Outdoor model in an
open, unroofed area and maintain the minimum clearances. (Refer to p.9.)
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Installation Manual
Installation
WARNING
CAUTION
• 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.
• The manufacturer does not recommend installing the water heater in a pit or
location where gas and water can accumulate.
• Do not have the vent terminal pointing toward any operating window, door, or
opening into a building.
• Do not install the water heater next to any source of airborne debris, such as a
clothes dryer and a vent that can cause debris to be trapped inside the combustion
chamber, unless the system is direct-vented.
• The manufacturer does not recommend installing the water heater in an attic due
to safety issues. If you install the water heater in an attic:
• Make sure the water heater will have enough combustion air and proper
ventilation.
• Keep the area around the water heater clean. When dust collects on the flame
sensor, the water heater will shut down on an error code.
• Place the water heater in a location that provides easy access for service and
maintenance.
• A drain pan, or other means of protection against water damage, is required to
be installed under the water heater in case of leaks.
• It is recommended to direct vent the heater.
• Damage caused by water quality is not covered by the warranty.
• Only potable water or potable water / glycol mixtures can be used with this
water heater. Do not introduce pool or spa water, or any chemically treated
water into the water heater.
• Water hardness levels must not exceed 7 grains per gallon (120 ppm) for single
family domestic applications or more than 4 grains per gallon (70 ppm) for
all other types of applications. Water hardness leads to scale formation and
may affect / damage the water heater. Hard water scaling must be avoided or
controlled by proper water treatment.
• Water pH levels must be between 6.5 and 8.5
• Well water must be treated.
• Do not install the water heater where water, debris, or flammable vapors may get
into the flue terminal.
• Although the water heater is designed to operate with minimal sound, the
manufacturer does not recommend installing the water heater 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
water heater, ensure that it will not restrict the combustion air flow.
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Installation Manual
Installation
INCLUDED ACCESSORIES
Check that these items below are included with the water heater.
Installation Manual Temperature Remote Controller kit*
Bird Screen
and Owner’s Guide
Outdoor model only
Indoor model only
Qty: 1
Qty: 2
Qty: 1
*For more information on optional items, please refer to p.32 to 33.
CLEARANCES
Maintain all clearances around
the water heater.
Top
Back
Side
Side
Front
Bottom
Model
Top
Bottom
Front
Back
Sides
140 Indoor
(T-H3M-DV)
12 in.
(305 mm)
12 in.
(305 mm)
4 in.*
(102 mm)
1 in.
(25 mm)
3 in.
(76 mm)
140 Outdoor
(T-H3M-OS)
36 in.
(914 mm)
12 in.
(305 mm)
24 in.
(610 mm)
1 in.
(25 mm)
3 in.
(76 mm)
*24 inches recommended for maintenance
Do not install this water heater under an
overhang less than 3 ft. (914 mm) from its top,
top of exhaust part, or eaves. The area under
an overhang must be open to three sides.
(Outdoor models only)
Do not install the water heater exhaust port
within 1 ft. (305 mm), in the USA, of any air
intake or building opening, and within 3 ft. (914
mm), in Canada, of any air intake or building
opening. (Outdoor models only) (Refer to p.17).
A
3 ft.
(914 mm)
A
exhaust port
A
A: 1 ft. (305 mm) USA/3 ft. (914 mm) Canada
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Installation Manual
Installation
VENTING INSTRUCTIONS
For the 140 Indoor (T-H3M-DV) model
-General• Improper venting of this appliance can result in excessive levels of carbon
monoxide which can result in severe personal injury or death.
• Improper installation can cause nausea or asphyxiation, severe injury or death
from carbon monoxide and flue gases poisoning. Improper installation will
DANGER
void product warranty.
When installing the vent system, all applicable national and local codes must be
followed. If you install thimbles, fire stops or other protective devices and they
penetrate any combustible or noncombustible construction, be sure to follow all
CAUTION applicable national and local codes.
The Indoor model must be vented in accordance with the section “Venting of Equipment" of the latest
edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the United States and/or Section 7 of the
CAN/CSA B149.1 Natural Gas and Propane Installation Code in Canada, as well as applicable local building
codes.
The use of venting materials approved for Category III/IV appliances is recommended whenever possible.
However, the Indoor model may also be vented with plastic pipe materials such as ABS, PVC, CPVC, or
Polypropylene. For details, please refer to the Exhaust Vent (ABS, PVC, CPVC, or Polypropylene Vent)
section on p. 11. Vent installations in Canada which utilize plastic vent systems must use venting that
complies with ULC S636.
General rules for venting water heaters are:
• Place the water heater as close as possible to the vent termination.
• The vent collar of the water heater must be fastened directly to an unobstructed vent pipe.
• Do not weld the vent pipe to the water heater’s vent collar.
• Do not cut or alter the vent collar of the water heater.
• The vent must be easily removable from the top of the water heater for normal service and
inspection of the unit.
• Avoid using an oversized vent pipe or using extremely long runs of the pipe.
• For rooftop venting, a rain cap or other form of termination that prevents rain water from
entering into the water heater must be installed.
• Do not terminate the vent into a chimney. If the vent must go through the chimney, the vent
must run all the way through the chimney with approved vent pipe.
General rules for vent terminations:
• Avoid locating the water heater vent termination near any air intake devices. These fans can
pick up the exhaust flue products from the water heater and return them to the building. This
can create a health hazard.
• Locate the vent termination so that it cannot be blocked by any debris, at any time. Most codes
require that the termination be at least 12 inches (305 mm) above grade, but the installer may
determine if it should be higher depending on the job site condition and applicable codes.
• A proper sidewall termination is recommended when the water heater is vented through a
sidewall.
• Regarding the clearances from the exhaust termination to the air inlet or opening, refer to p. 17
to 19.
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Installation Manual
Installation
-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)The Indoor model can be vented with ABS, PVC, CPVC, or polypropylene (temperature rated up to at
least 149 °F). Vent material certified to ULC S636 standards is recommended in the USA. In Canada,
plastic venting must be certified to ULC S636 standards.
Item
Material
United States
Schedule 40 PVC
ANSI/ASTM D1785
PVC-DWV
ANSI/ASTM D2665
Exhaust pipe and
Schedule 40 CPVC
ANSI/ASTM F441
Fittings
Schedule 40 ABS-DWV ANSI/ASTM D2661
Polypropylene
UL-1738
PVC
ANSI/ASTM D2564
Pipe Cement/Primer
CPVC
ANSI/ASTM F493
ABS
ANSI/ASTM D2235
NOTE: Do NOT Use Cellular Foam Core Pipe
Canada
ULC S636 Certified
Materials Only
• The maximum length of exhaust vent piping must not exceed 70 ft. (21.3 m) for 3” venting, which
depends on the elevation where the water heater is installed, and 100 ft. (30.5 m) for 4” venting
(deducting 5 ft. (1.5 m) for each elbow used in the venting system). Do not use more than 5
elbows. See the table below.
• When the horizontal vent run exceeds 5 ft. (1.5 m), support the vent run at 3 ft. (0.9 m) intervals
with overhead hangers.
Max. Vertical or Horizontal (Total) Vent Lengh
No. of
Elbow
0
1
2
3
4
5
2" venting
Up to 3,000 ft
6.5 ft. (2.0 m)
1.5 ft. (0.5 m)
N/A
N/A
N/A
N/A
Up to 3,000 ft
70 ft. (21.3 m)
65 ft. (19.8 m)
60 ft. (18.3 m)
55 ft. (16.8 m)
50 ft. (15.2 m)
45 ft. (13.7 m)
3" venting
Up to 6,000 ft Up to 10,100 ft
40 ft. (12.2 m) 25 ft. (7.6 m)
35 ft. (10.7 m) 20 ft. (6.1 m)
30 ft. (9.1 m)
15 ft. (4.6 m)
25 ft. (7.6 m)
10 ft. (3.0 m)
20 ft. (6.1 m)
5 ft. (1.5 m)
N/A
N/A
Excludes vent terminators, termination elbows, or rain caps.
For details on the vent connection, refer to p. 13 to 16.
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.
11
Page
4" venting
Up to 10,100 ft
100 ft. (30.5 m)
95 ft. (29.0 m)
90 ft. (27.4 m)
85 ft. (25.9 m)
80 ft. (24.4 m)
75 ft. (22.9 m)
Installation Manual
Installation
-DIPswitch settings for Vent lengthSet DIPswitches shown in the tables below depending on the vent length. Only adjust switches with a black
square. Black squares indicate the position of the switch.
2 inch venting
Vent length
Single pipe
ON 1 2 3 4 5 6 7 8 9 10
5 to 6.5 ft.
OFF
No. 6 : ON
No. 7 : ON
3 inch venting
Vent length
5 to 20 ft.
(DEFAULT)
Two-pipe
Vent length
ON 1 2 3 4 5 6 7 8 9 10
5 to 45 ft.
(DEFAULT)
OFF
No. 6 : ON
No. 7 : OFF
OFF
46 to 70 ft.
No. 6 : OFF
No. 7 : OFF
ON 1 2 3 4 5 6 7 8 9 10
41 to 70 ft.
OFF
No. 6 : ON
No. 7 : ON
4 inch venting
Vent length
5 to 50 ft.
(DEFAULT)
Two-pipe and Single pipe
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : ON
No. 7 : OFF
ON 1 2 3 4 5 6 7 8 9 10
51 to 100 ft.
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : ON
No. 7 : OFF
ON 1 2 3 4 5 6 7 8 9 10
ON 1 2 3 4 5 6 7 8 9 10
21 to 40 ft.
Single pipe
OFF
No. 6 : OFF
No. 7 : OFF
12
Page
OFF
No. 6 : OFF
No. 7 : OFF
Installation Manual
Installation
-Intake and Exhaust Venting IllustrationsTypical installations using ABS, PVC, CPVC, or polypropylene vent
2 inch vent installation
Vent connections for single pipe
2" straight pipe
* 3" elbow with bird
screen
3"x2" reducer
Exhaust vent
collar (Female)
Intake vent
collar
(Female)
*The water heater came with a metal screen
that will fit into a 3 inch elbow.
1. Connect a 3" elbow directly on the
intake vent collar of the water heater.
2. Connect a 3" x 2" reducer directly on
the exhaust vent collar of the water
heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
3. Connect a 2" straight pipe to
the reducer.
For details of the optional items, refer to the Installation manual for each optional item.
Single pipe with room-air intake
Hanger
Termination
Refer to pages 17 and 19 for clearance information
13
Page
Installation Manual
Installation
3 inch vent installation
Vent connections for single pipe
Vent connections for two-pipe
3" straight pipe
3" coupling
3" straight pipe
3" straight pipe
* 3" elbow with
bird screen
3"coupling
Intake vent
collar
(Female)
Exhaust
vent collar
(Female)
Intake vent
collar
(Female)
3" coupling
Exhaust
vent collar
(Female)
*The water heater came with a metal screen
that will fit into a 3 inch elbow.
1. Connect a 3" elbow directly on the
intake vent collar of the water heater.
2. Connect a 3" coupling directly on the
exhaust vent collar of the water heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
3. Connect a 3" straight pipe to
the coupling.
For details of the optional items, refer to the Installation manual for each optional item.
1. Connect 3" couplings directly on
the exhaust and intake vent collar
of the water heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
2. Connect 3" straight pipes to the
couplings.
4 inch vent installation
Vent connections for single pipe
Vent connections for two-pipe
4" straight
pipe
3"x4"
increaser
Intake vent
collar
(Female)
4" straight
pipe
3"x4" increaser
Exhaust
vent
collar
(Female)
4" straight pipe
* 3" elbow with
bird screen
3"x4" increaser
Exhaust vent
collar (Female)
Intake vent
collar
(Female)
*The water heater came with a metal screen
that will fit into a 3 inch elbow.
1. Connect 3"x4" increasers
directly on the exhaust and intake
vent collar of the water heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
2. Connect 4" straight pipes to
the increasers.
1. Connect a 3" elbow directly on the
intake vent collar of the water heater.
2. Connect a 3"x4" increaser directly on
the exhaust vent collar of the water
heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
3. Connect a 4" straight pipe to
the increaser.
For details of the optional items, refer to the Installation manual for each optional item.
14
Page
Installation Manual
Installation
Examples of installation of 3 inch & 4 inch vent
Two-pipe, direct-vent
Hanger
Single pipe with room-air intake
Hanger
Wall
Wall
Hanger
Termination
Terminations
Roof
Roof
Roof flashing
Roof flashing
Fire stop
Fire stop
Refer to pages 17 and 19 for clearance information
15
Page
Installation Manual
Installation
-Exhaust vent (Stainless steel vent)This is a Category IV appliance and must be vented accordingly. The vent system must be sealed airtight.
All seams and joints without gaskets must be sealed with high heat resistant silicone sealant or UL listed
aluminum adhesive tape having a minimum temperature rating of 160 °F. For best results, a vent system
should be as short and straight as possible.
• The Indoor model is a Category IV appliance and must be vented accordingly with any 4 inch vent
approved for use with Category III/IV or Special BH type gas vent.
• The manufacturer recommends the NovaVent (Z-Vent) line. However, the following are also UL
listed manufacturers: ProTech Systems Inc. (FasNSeal), Metal-Fab Inc., and Heat-Fab Inc. (Saf-T
Vent).
• Follow the vent pipe manufacturer’s instructions when installing the vent pipe.
• The maximum length of exhaust vent piping must not exceed 100 ft. (30.5 m) (deducting 5 ft. (1.5
m) for each elbow used in the venting system). Do not use more than 5 elbows.
• When the horizontal vent run exceeds 5 ft. (1.5 m), support the vent run at 3 ft. (0.9 m) intervals
with overhead hangers.
Diameter
Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
4 in. (102 mm)
5
100 ft. (30.5 m )
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.
No. of Elbows
0
1
2
3
4
5
Max. Vertical or Horizontal Vent Length
100 ft. (30.5 m)
95 ft. (29.0 m)
90 ft. (27.4 m)
85 ft. (25.9 m)
80 ft. (24.4 m)
75 ft. (22.9 m)
Excludes vent terminators, termination elbows, or rain caps.
Vent connections for single pipe
Vent connections for two-pipe
4" stainless
steel vent
straight pipe
Intake vent collar
(Female)
4" stainless
steel vent
straight pipe
4" elbow
with bird
screen
Exhaust vent
collar (Female)
Intake vent
collar
(Female)
4" stainless
steel vent
straight pipe
Exhaust vent
collar (Female)
1. Connect a 4" stainless steel vent
straight pipes directly on the
exhaust vent collar of the
water heater.
2. Connect a 4" elbow directly
on the intake vent collar of the
water heater.
1. Connect 4" stainless steel vent
straight pipes directly on the
exhaust/intake vent collar of the
water heater.
For details of the optional items, refer to the Installation manual for each Optional item.
16
Page
Installation Manual
Installation
-Vent termination clearancesINSIDE CORNER DETAIL
V Vent terminal
X Air supply inlet
V
Area where is not permitted
G
H
A
D
E
V
B
B
B
C
V
F
V
FIXED
ED
CLOS E
BL
A
OPER
V
L
V
ED
ABLE FIXLOSED
C
OPER
V
B
B
V
I
X
M
V
X
K
J
A
Gas meter / regulator
B
A
Canada
Direct-vent and other
than Direct-vent
Directvent
1 foot
1 foot
1 foot
3 feet
1 foot
4 feet from below or
side opening. 1 foot
from above opening
Clearance above grade, veranda, porch, deck, or
balcony
B Clearance to window or door that may be opened
C
U.S.A
Other than
Direct-vent
Clearance to permanently closed window
*
*
*
Vertical clearance to ventilated soffit located above
the vent terminator within a horizontal distance
D
*
*
*
of 2 feet (61cm) from the center line of the
terminator
E Clearance to unventilated soffit
*
*
*
F Clearance to outside corner
*
*
*
G Clearance to inside corner
*
*
*
Clearance to each side of center line extended
H
3 feet
*
*
above meter/regulator assembly
I Clearance to service regulator vent outlet
3 feet
*
*
Clearance to non-mechanical air supply inlet to
4 feet from below or
J building or the combustion air inlet to any other
3 feet
1 foot
side opening. 1 foot
application
from above opening
K Clearance to mechanical air supply inlet
6 feet
3 feet
3 feet
Clearance above paved sidewalk or paved driveway
L
7 feet
*
7 feet
located on public property
M Clearance under veranda, porch deck, or balcony
1 foot
*
*
*For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CSA-B149.1, please use clearances in accordance
with local installation codes and the requirements of the gas supplier.
17
Page
Installation Manual
Installation
For multiple sidewall exhaust terminations, an exhaust
termination must be at least 1 ft. (305mm) away from
another exhaust termination. An exhaust termination
must also be at least 2 ft. (610 mm) away from an inside
corner. (If the adjacent wall is less than 2 ft. (610 mm) of
length, the minimum required distance away from the
inside corner will be equal to the length of that adjacent
wall.)
2 ft.
1 ft. (305 mm) (610mm) min.
min.
1 ft.
(305 mm) min.
Exhaust
termination
Inside
corner
1 ft. (305 mm)
min.
For multiple, direct-vent sidewall terminations that
combine the intake and exhaust into a single penetration,
space each direct-vent termination at least 1 ft. (305 mm)
away from each other, no matter the orientation. A directvent termination must also be at least 2 ft. (610 mm) away
from an inside corner. (If the adjacent wall is less than 2 ft.
(610 mm) of length, the minimum required distance away
from the inside corner will be equal to the length of that
adjacent wall.)
2 ft.
(610 mm) min.
1 ft.
(305 mm) min.
Combined
intake and
exhaust
termination
Inside
corner
<Case 1>
Exhaust
Exhaust
For direct-vent sidewall
terminations that use two
separate penetrations for
the intake and exhaust,
keep the termination
clearances shown in the
diagrams on the right.
Intake
Intake
A
1ft. (305 mm)
min.
<Case 2>
Exhaust
Exhaust
A
A
Intake
1 ft.
(305 mm)
min.
Intake
A
* 3inch and 4 inch vent installations only
A: 0.5 ft. (159mm)
The clearance of A is recommended on the basis of the structure of the water heater.
18
Page
Installation Manual
Installation
Exhaust and/or direct-vent sidewall terminations should
be at least 2 ft. (610 mm) away from an opposite surface/
wall. Do not place the termination directly in front of an
opening into a building.
2 ft. (610 mm)
min
Exhaust
termination
<For rooftop terminations>
2 ft (610 mm) min.
3 ft (914 mm) min.
Intake air
Intake air
B
B
B
Exhaust gas
A
Exhaust
Gas
A
A:Exhaust terminations must be at least 1 ft. (305 mm) away from any obstructions.
B:Intake terminations must be at least 1 ft. (305 mm) away from any obstructions.
Please follow all local and national codes in regards to proper termination
clearances. In the absence of such codes, the clearances above can be used as
CAUTION guidelines. Local codes supersede these guidelines.
19
Page
Installation Manual
Installation
GAS SUPPLY AND GAS PIPE SIZING
-General-
CAUTION
• Check that the type of gas matches the rating plate first.
• Ensure that any and all gas regulators used are operating properly and
providing gas pressures within the specified range shown below. Excess gas
inlet pressure may cause serious accidents.
• Conversion of this water heater from natural gas to propane or vice versa will
void all warranty. Contact your local distributor to get the correct unit for your
gas type. The manufacturer is not liable for any property and/or personal
damage resulting from gas conversions.
• The minimum and maximum inlet gas pressures are:
Gas type
Inlet gas pressure
Natural Gas
Min. 5.0” W.C. (1.24 kPa) – Max. 10.5” W.C. (2.61 kPa)
Propane
Min. 8.0” W.C. (1.99 kPa) – Max. 14.0” W.C. (3.48 kPa)
• Inlet gas pressures that fall outside the range of values listed above may adversely affect the
performance of the water heater. These pressures are measured when the water heater is in full
operation.
• Inlet gas pressure must not exceed the above maximum values; gas pressure above the specified range
will cause dangerous operating conditions and damage to the water heater.
• Until testing of the main gas line supply pressure is completed, ensure the gas line to the water heater
is disconnected to avoid any damage to the water heater.
-Gas connections1. Install a manual gas shutoff valve between the water heater and the gas supply line. The gas supply
line shall be checked for leaks using code approved methods.
2. When the gas connections are completed, it is necessary to perform a gas leak test either by applying
soapy water to all gas fittings and observing for bubbles or by using a gas leak detection device.
• The water heater and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of 1/2 psi
(3.5 kPa).
• The water heater must be isolated from the gas supply piping system by closing its individual
manual shutoff valve during any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psi (3.5 kPa).
3. Always purge the gas line of any debris and/or water before connecting to the gas inlet.
NOTICE
Size the gas pipe appropriately to supply the necessary volume of gas required
for the water heater using ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 in
Canada or local codes. Otherwise, flow capabilities and output temperatures will
be limited.
20
Page
Installation Manual
Installation
-Natural Gas Supply PipingMaximum delivery Capacity of Cubic Feet of Gas per Hour of IPS Pipe carrying Natural Gas with 0.60 Specific Gravity
Based on Pressure Drop of 0.5" W.C.
Based on Energy Content of 1,000 BTU/Cubic ft.: The water heater requires 120 Cubic ft./hr for the 140 (T-H3M)
models.
Unit: Cubic feet per hour
Pipe Size
Diameter
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
Length
10'
20'
30'
40'
50'
60'
70'
80'
90'
100'
125'
150'
200'
172
118
95
81
72
65
60
56
52
50
44
40
34
84
158
324
486
936
72
135
278
416
801
363 249 200 171 152 138 127 118 111 104
93
684 470 377 323 286 259 239 222 208 197 174
1,404 965 775 663 588 532 490 456 428 404 358
2,103 1,445 1,161 993 880 798 734 683 641 605 536
4,050 2,784 2,235 1,913 1,696 1,536 1,413 1,315 1,234 1,165 1,033
-Propane (LP) Supply Piping-
Unit: kBTU per hour
Maximum
pressure at a 0.5" W.C. pressure drop
Pipe SizeCapacity of Propane (LP) Based on 11" W.C. supply
Length
Diameter
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
10'
20'
30'
40'
50'
60'
70'
80'
90'
100'
125'
150'
200'
268
184
148
126
112
101
93
87
82
77
68
62
53
567 393 315 267 237 217 196 185 173 162 146 132 112
1,071 732 590 504 448 409 378 346 322 307 275 252 213
2,205 1,496 1,212 1,039 913 834 771 724 677 630 567 511 440
3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976 866 787 675
6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811 1,606 1,496 1,260
Gas sizing example (Natural Gas)
Gas meter
10' Length
1-1/4" Pipe size
Water
heater
120,000 BTU/h
Dryer
35,000 BTU/h
10' Length
1/2" Pipe size
A
10' Length
1" Pipe size
B
10' Length
1/2" Pipe size
15' Length
1" Pipe size
10' Length
3/4" Pipe size
Furnace
120,000 BTU/h
15' Length
C 1/2" Pipe size
Range
65,000 BTU/h
Based on Energy Content of 1,000 BTU/Cubic ft:
Divide each appliance's BTU requirement by 1,000 BTU/h to get the appliances Cubic Ft. requirement.
Take into account the distance the appliance is from the gas meter, look in the above gas chart to properly size the line.
For sections of the gas line supplying gas to more than one appliance (Ex: Point A to Point B), add up the cubic ft.
requirements of the appliances that are being supplied by that section, and size to the farthest appliance.
For Example: The section from A to B supplies gas to the furnace, range and dryer. Adding up the BTU requirements and
dividing by 1,000 yields a cubic ft. requirement of 220 cubic ft. of gas. The farthest appliance is the range, which is 50 ft.
away from the meter. Looking at the above chart, and under the column of 50 ft., Section A to B needs to be 1" in order
to supply 220 cubic ft.
21
Page
Installation Manual
Installation
-Measuring inlet gas pressure1. Turn off all electric power to the water heater if service is to be performed.
2. Turn the manual gas valve located on the outside of the water heater clockwise
to the off position.
The water heater cannot perform properly without sufficient inlet gas pressure. Below are instructions on
how to check the inlet gas pressure. THIS IS ONLY TO BE DONE BY A LICENSED PROFESSIONAL.
1. Shut off the manual gas valve on the gas supply line.
2. Remove the screw for the pressure port located on the
gas inlet of the water heater shown in the diagram on
the right.
3. Connect the manometer to the pressure port.
4. Re-open the manual gas valve. Check to see that there
are no gas leaks. Take a reading of the gas pressure.
Open some of the fixtures that use the highest flow rate
to turn on the water heater.
5. Check the inlet gas pressure. Take another reading.
When the water heater is on maximum and minimum
burn, the manometer should read from 5.0” to 10.5”
W.C. (1.24 to 2.61 kPa) for Natural gas, or from 8.0” to
14.0” W.C. (1.99 to 3.48 kPa) for Propane. Verify that the
pressure drop is acceptable.
Pressure port
WATER CONNECTIONS
• Do not use this water heater if any part has been submersed under water.
Immediately call a licensed professional to inspect the water heater to replace
any damaged parts.
• Do not reverse the hot outlet and cold inlet connections to the water heater.
CAUTION
This will not properly activate the water heater.
All pipes, pipe fittings, valves and other components, including soldering materials, must be suitable for
potable water systems.
1. A manual shutoff valve must be installed on the cold water inlet to the water heater between the main
water supply line and the water heater.
2. In addition, a manual shutoff valve is also recommended on the hot water outlet of the water heater.
If the water heater is installed within, or subjected to, a closed loop water system, a thermal expansion
tank or code approved device to handle thermal expansion must be installed. We recommend isolation
valve sets with hose bibs for serviceability such as flushing. See maintenance and service section.
3. Before installing the water heater, flush
the water line to remove all debris, and
after installation is complete, purge
the air from the line. Failure to do so
may cause damage to the heater.
4.There is a wire mesh filter within
As Close as
the cold inlet to trap debris from
Possible
entering your heater. This will need
to be cleaned periodically to maintain
Gas inlet
optimum flow. (Refer to p. 41.)
Hot
Cold
Pressure relief valve
outlet inlet
22
Page
Installation Manual
Installation
-Pressure relief valveThe water heater has a high-temperature shutoff switch built in as a standard safety feature (called a
Hi-Limit switch) therefore a “pressure only” relief valve is required.
• This water heater does not come with an approved pressure relief valve.
• An approved pressure relief valve must be installed on the hot water outlet.
• The pressure relief valve must conform to ANSI Z21.22 or CAN 1-4.4 and installation must follow local
codes.
• The discharge capacity must be at least 120,000 BTU/h for the 140 (T-H3M) models.
• The pressure relief valve needs to be rated for a maximum of 150 psi (1 MPa).
• The discharge piping for the pressure relief valve must be directed so that the hot water cannot splash
on anyone or on nearby equipment. Follow local codes.
• Attach the discharge tube to the pressure relief valve and run the end of the tube to within 6 inches
(152 mm) from the floor. This discharge tube must allow free and complete drainage without any
restrictions.
• If the pressure relief valve installed on the water heater discharges periodically, this may be due to a
defective thermal expansion tank, defective pressure relief valve, or it could be signs of internal scale
build up.
• The pressure relief valve must be manually operated periodically to check for correct operation.
• No valves may be placed between the relief valve and the water heater.
CONDENSATE DRAIN
• The water heater does not include a built-in condensate neutralizer cartridge for reducing the pH level
of condensate water. If local codes dictate that condensate must be neutralized prior to drainage, a
condensate neutralizer must be installed. An accessory Neutralizer assembly is sold separately.
• In the absence of applicable local codes and regulations, the manufacturer recommends that
condensate be disposed of into a standard drain. Connect a drain tube from the condensate drain port
(shown below) located on the bottom of the water heater to a standard drain.
Follow all code requirements
of the local authority on
condensate neutralizers and
whether or not they are required
for the installation.
Condensate drain port
23
Page
Installation Manual
Installation
-Condensate Drain Connections-
WARNING
Discharge condensate (acidic water) in accordance with all local codes
and common safety practices.
The water heater is a high efficiency condensing model that produces condensate (acidic water). The
acidic condensate generated in the secondary heat exchanger can be neutralized by the Neutralizer accessory.
Case A: If a neutralizer is not required
1. Connect a 1/2” FPT X 3/8” (or 1/2”) HB Adaptor to the condensate drain port at the bottom of the
water heater.
2. Connect a condensate drain tube to the 1/2” FPT X 3/8” (or 1/2”) HB Adaptor. The manufacturer
recommends the material of the condensate tube be either EPDM or PVC.
3.Leave an adequate amount of space between the end of the drain tube and the actual drain, to
facilitate proper drainage.
Case B: If a neutralizer is required (installing the Neutralizer assembly)
1. Connect the 1/2” FPT X 3/8” MPT Adaptor to the condensate drain port at the bottom of the water
heater.
2. Connect the Neutralizer to the 3/8” MPT connection of the adaptors. There is a flow direction indicator
on the neutralizer. Please orient the neutralizer in the proper direction.
3. Connect a 1/2” drain tube to the other end of neutralizer.
4.Leave an adequate amount of space between the end of the drain tube and the actual drain, to
facilitate proper drainage.
Case B
Case A
Condensate
drain port
1/2" FPT x 3/8"
(or 1/2") HB
Condensate
drain port
1/2" FPT x 3/8" MPT
(Included with
Neutralizer accessory)
Neutralizer cartridge
(Included with
Neutralizer accessory)
3/8" or 1/2"
Condensate
drain tube
3/8" MPT x 1/2" HB
(Included with
Neutralizer accessory)
Drain
Drain
Adequate space
24
Page
1/2" Condensate
drain tube
Adequate space
Installation Manual
Installation
• The condensate drain is at atmospheric pressure (non-pressurized) and
therefore must be allowed to drain freely with gravity only. Please ensure that
there are no blockages along the condensate drain tube. All portions of the
condensate drain (neutralizer and drain tube) must be at a lower elevation
WARNING
than the water heater to prevent condensate water from building up inside
the heat exchanger.
• Condensate cannot be effectively neutralized if the neutralizer elements inside
the Neutralizer accessory have been completely consumed. If this happens,
condensate will remain acidic and can possibly cause damage to items such as
pipes, concrete, etc., if drained improperly.
• The Neutralizer cartridge is designed to last for 3 years before replacement.
However, the actual life of the neutralizer may vary, depending on the
application and usage. Please ensure that the cartridge is properly replaced
before the neutralizer elements have been completely consumed.
• All preventative measures and safety practices must be adhered to when
draining condensate. The manufacturer will not be responsible for any damage
caused by condensate.
• A drain pan, or other means of protection against water damage, is required to
be installed under the water heater in case of leaks.
ELECTRICAL CONNECTIONS
Follow the electrical code requirements of the local authority having jurisdiction.
In the absence of such requirements, follow the latest edition of the National
Electrical Code ANSI/NFPA 70 in the U.S. or the latest edition of CSA C22.1
WARNING Canadian Electrical Code Part 1 in Canada.
CAUTION
When servicing or replacing parts within the water heater, label all wires prior to
disconnection to facilitate an easy and error-free reconnection. Wiring errors can
cause improper and dangerous operation. Verify proper operation after servicing.
All Indoor models come with a power plug instead of a junction box. The following procedure is for
the outdoor model only.
1. The water heater must be electrically grounded. Do not attach the ground wire to either the gas or
the water piping.
2. The water heater requires 120 VAC, 60 Hz electrical power supply that is properly grounded.
• A proper disconnect (i.e. on/off switch, power plug, etc.) controlling the main power to the water
heater must be provided for service reasons. (Must comply with local codes.)
• Connect the power supply to the water heater exactly as shown in the wiring diagram.
3. A green screw is provided in the junction box to ground the connection.
4. Can be hardwired or wired to a plug-in.
5. The use of a surge protector is recommended in order to protect the water heater from power surges.
Indoor model
Outdoor model
Green screw
Connect
Power supply
120VAC, 60Hz
Ground
Bottom view of water heater
25
Page
View of electrical
connections of water heater
Installation Manual
Installation
TEMPERATURE REMOTE CONTROLLER
Only the outdoor model comes with the temperature remote controller, which is an
optional accessory for the indoor model.
Check that these items below are included with the remote controller.
Temperature
Remote Controller
Screws
Qty: 1
Manual
Qty: 2
Qty: 1
Remote Controller Cable
Qty: 1
-INSTALLATION-
CAUTION
• This remote controller is NOT waterproof
Do not install in high temperature environments, steamy conditions (such as a
bathroom), outdoors, in direct sunlight, or within the reach of children.
Make sure the remote controller does not come into contact with water or oil.
• Do not place the remote control wiring close to other wires from other
products.
• Do not extend the remote control wiring more than 400 ft. (122 m).
<Mounting and Wiring the Remote Controller>
1. Take off the “Back plate” from the remote controller with a flat head screwdriver. (Fig. A and B)
2. Attach the “Back plate” on the wall with the two provided screws. (Fig. B)
Fig. A
Press and twist flat head
screwdriver against the cutout.
Main body
Twist
Fig. B
Back plate
Attach the screws
3-1/4 inches
Main body
Cut out the partition with pliers
26
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Installation Manual
Installation
3. Tighten the two "Fork terminals" beneath the two "Remote controller terminal" screws,
which are not polarity-sensitive, on the back of the main body. (Fig. C-1)
4. Cut out the inlet for the remote controller cable from the bottom of the main body. (Fig. C-2)
5. Place the “Main body” back on the "Back plate", with the "Remote controller cable" running
out of the bottom inlet.
Fig. C-1
Remote controller
terminals
Fig. C-2
Inlet for the remote
controller cable
Two fork terminals
Cut out
Remote controller cable
<How to connect the remote controller to the water heater>
1. Disconnect power supply from the water heater.
2. Take off the water heater’s front cover.
3. Locate the remote controller terminals, pictured below (located around the lower
right-hand side of the computer board).
4. Take off the back plate from the remote controller, and then attach the two fork terminals to
connector base on the backside of the remote controller with two screws. Make sure the
terminals are firmly fixed.
5. Pull the remote’s wires through the hole at the bottom of the water heater’s casing.
6. Properly attach the remote’s wires to the remote controller terminal on the computer board
(No polarity).
* Do NOT jump or short-circuit the wires, or the computer will be damaged.
7. Replace Front Cover securely.
8. Wires used for the remote controller connection must be:
• Minimum 20 gauge wire (No polarity)
• Maximum 400 ft. (122 m) long
9008172005 (TM-RE40)
Connect other end to these terminals
27
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Installation Manual
Installation
HIGH-ALTITUDE INSTALLATIONS
Check the elevation where your water heater is installed. Set DIPswitches shown in the tables below
depending on the altitude.
Indoor model
Altitude
0 to 2,000 ft.
(DEFAULT)
ON
1 2 3 4 5 6 7 8 9 10
ON
3,000 to
5,000 ft.
1 2 3 4 5 6 7 8 9 10
OFF
OFF
DIPswitches
2,000 to
3,000 ft.
ON
1 2 3 4 5 6 7 8 9 10
OFF
5,000 to
7,500 ft.
ON
1 2 3 4 5 6 7 8 9 10
7,500 to
10,100 ft.
ON
1 2 3 4 5 6 7 8 9 10
OFF
OFF
No. 3 : OFF
No. 4 : OFF
No. 5 : OFF
No. 3 : OFF
No. 4 : ON
No. 5 : OFF
No. 3 : OFF
No. 4 : OFF
No. 5 : ON
No. 3 : OFF
No. 4 : ON
No. 5 : ON
0 to 2,000 ft.
(DEFAULT)
2,000 to
4,000 ft.
4,000 to
6,000 ft.
Over 6,000 ft.
No. 3 : ON
No. 4 : ON
No. 5 : ON
Outdoor model
Altitude
ON
1 2 3 4 5 6 7 8 9 10
OFF
DIPswitches
ON
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
OFF
OFF
No. 3 : OFF
No. 4 : OFF
No. 5 : OFF
ON
No. 3 : OFF
No. 4 : OFF
No. 5 : ON
No. 3 : ON
No. 4 : OFF
No. 5 : ON
Consult our
Technical
Services
at 1-877737-2840
NOTE: The dark squares indicate the direction the DIPswitches should be set to.
Only adjust the necessary switches.
Computer board
Bank of DIPswitches
28
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Installation Manual
Installation
APPLICATIONS
-Space-Heating Applications• In order to purge air in water pipes within a closed-loop system, an air vent
and air separator should be installed in the system. Required circulation
flow rates are labeled next to each application diagram. These flow rate
requirements must be followed.
WARNING
• Toxic chemicals used in boiler treatments such as alcohol, glycerol and glycol
groups must not be introduced into the system if the system incorporates an
open-loop potable water system.
• The water heater can be used to supply potable water and space heating and
shall not be connected to any heating system or component(s) previously
used with non-potable water where any chemicals were added to the water
heating appliances.
• When the system requires water for space heating at temperatures higher
than required for other uses, a means such as a mixing valve shall be installed
to temper the water for those other uses in order to reduce scald hazard
potential.
• Water temperature over 125 °F (52 °C) can cause severe burns instantly or
death from scalding.
• Chemicals such as diluted Glycol can be used for radiant floor, Hydro/fan coil
air or Baseboard heating only. The diluted solution of glycol must contain
between 25 and 55 % of Glycol. Be aware that in closed-loop glycol systems,
low pressure in the heat exchanger can cause low-temperature boiling,
resulting in excessive noise and damage to the water heater. Consult with the
glycol maker for specifications prior to use.
-Recirculation*The recirculation pump is to be controlled by:
-Dual-set aquastat (recommended w/timer)
*The recirculation pump is to provide no less than 2 GPM (7.5 L/min) and no more than 4 GPM (15 L/min) through
each activated unit in the system.
Gas inlet
Cold water inlet
Hot water outlet
Air vent
Unions
Ball valves
Hot water outlet to fixtures
Gas supply
S
Check valve
Recirculation Air
pump
separator
Check valve
Expansion tank
Cold water inlet
Y-Strainer
This is a concept drawing only.
29
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Installation Manual
Installation
-Dual-purpose hot water heating(Domestic and Space Heating):
Diagrammatic layout of radiant heating and domestic water heater per mass. code.
All water piping should be insulated
in accordance with 780 CMR
(Massachusetts energy code)
Thermostatic mixing valve
Heating Coil
(used with air-handler)
System installed with reverse
acting aquastat to shut off fan.
Suggested but not required by
248 CMR
50’-0” maximum distance from
water heater to fan coil.
(Developed length) Not including
coil in heating unit
Hot water
supply and
return to
heating coil
Check valves
Drain Water
plug filter
Ball
Valve
Isolation
Valve
Unions
120 VAC
switch or
outlet
Shutoff valves
Shutoff valves
Atmospheric
vacuum
breaker
Gas inlet
Tempered water to
plumbing fixtures. Must
meet temperature
requirements of 248 CMR
Shutoff
valve
Pressure
gauge
Cold water inlet
Piping loop
between water
heater and fan
coil shall be in
compliance with
248 CMR
Apply correct thermal
expansion tank-size
per application
Check valve will have
1/8-inch hole drilling
in clapper optional
Hot water outlet
Automatic tempering device
must be installed below
the top of the water heater
as per manufacturer’s
recommendations
3-inch gas exhaust
vent (Discharge must
comply with local and
state codes.) Cannot
be common vented
with other appliances
Cold water supply
Check valve
NSF-61 product
T-handle gas shutoff valve
approved pump
An approved temperature and pressure
Electronically controlled
relief valve. Tie to location approved by
pump timer. Activates
local codes and must meet BTU rating of
every 6 hours for 60
water heater model used
seconds. Wire to
product approved pump
The recirculation pump is to provide no less than 2 GPM (7.5 L/min) and no more than 4 GPM (15 L/min)
through each activated unit in the system.
NOTICE
• Priority Control Devices such as a flow switch, an Aquastat or other
electronic controller can be used to prioritize the domestic water system over
the heating system.
• Follow all local codes, or in the absence of local codes, follow the most recent
edition of the National Standard Code, ANSI Z21.10.3.
• This illustration is a concept design only. The reference to the 1/8th hole
in check is only for the State of Massachusetts. There are a wide variety
of variations to the application of controls and equipment presented.
Designers must add all necessary safety and auxiliary equipment to conform
to code requirements and design practice. For more details, contact the
manufacturer.
30
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Installation Manual
Installation
INITIAL OPERATION
FOR YOUR SAFETY, READ BEFORE OPERATING
• Check the GAS and WATER CONNECTIONS for leaks before firing unit for the first time.
• Open the main gas supply valve to the water heater using only your hand to avoid any
spark. Never use tools. If the knob will not turn by hand, do not try to force it; call a qualified service technician. Forced repair may result in a fire or explosion due to gas leaks.
• Be sure to check for the presence of leaking gas toward the bottom of the water heater
because some gases are heavier than air and may settle towards the floor.
• Check the GAS PRESSURE. Refer to p. 20 and 22.
• Do not try to light the burner manually. It is equipped with an electronic ignition device
which automatically lights the burner.
• Check for PROPER VENTING and COMBUSTION AIR to the water heater.
• Purge the GAS and WATER LINES to remove any air pockets.
• Do not use this water heater if any part has been submersed under water. Immediately call
a qualified service technician to inspect the water heater and to replace any damaged parts.
IF YOU SMELL GAS:
WARNING
• Do not try to start the water heater.
• Do not touch any electric switches; 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.
Operation
Once the above checks have been completed, please clean
1. filter of any debris. Refer to p. 41 for instructions.
Fully open the manual water control valve on the water
2. supply line.
Open a hot water tap to verify that water is flowing to that
3. tap. Then close the hot water tap.
4.
Fully open the manual gas control valve installed.
Turn on the 120 VAC, 60 Hz power supply to the water
5. heater.
6.
Now you are ready to enjoy hours of endless hot water.
31
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Installation Manual
Installation
OPTIONAL ITEMS
#
Model
140
Indoor
(T-H3M-DV)
140
Outdoor
(T-H3M-OS)
1.
Temperature Remote Controller
✓
Included with the
water heater
2.
4-inch Backflow Preventer
and F-F adaptor
✓
3.
Pipe Cover
✓
✓
4.
Neutralizer Kit
✓
✓
5.
4-inch Exhaust Sidewall Vent Terminator (Hood)
and 4-inch Wall Thimble
✓
6.
3-inch Concentric PVC
Termination
✓
1. Temperature Remote Controller:
9008172005 (TM-RE40)
2. 4-inch Backflow Preventer & F-F Adaptor:
9007996005
The temperature remote controller has two
functions. It allows the output temperature
from the water heater to be adjusted within the
range of 100 °F to 140 °F, and it also works as a
diagnostic tool that will give a concise error code
whenever there is a problem with the water
heater. The temperature options are 100 °F, 105
°F, 110 °F, 115 °F, 120 °F, 125 °F, 130 °F, 135 °F,
and 140 °F. See the troubleshooting Section for
information on possible error codes.
There are two functions available for this
adaptor, which can be connected with the water
heater and NovaVent venting line and prevents
the backflow of air through the exhaust vent.
This helps prevent harmful exhaust gases from
entering the home, as well as helping to prevent
the water heater from freezing in areas where
cold air can be blown or drawn into the exhaust
system. Install this adaptor in accordance with
the installation instructions that are packaged
with the adaptor and any applicable codes.
3. Pipe Cover: (TH-PC04)
4. Neutralizer Kit: 9007607005 (TH-NT01)
The neutralizer assembly neutralizes
the condensate (acidic water)
that forms in the secondary heat
exchanger of the water heater.
It connects to the condensate
drain port of the water heater by
using connectors included with the
neutralizer kit. Refer to p. 23 and 24
for the details.
The pipe cover protects the plumbing pipes to
the water heater from unexpected adjustments.
This pipe cover is fixed to the bottom of the water
heater, which hides the plumbing and improves
the visual aspects of the whole installation for the
water heater.
32
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Installation Manual
Installation
5. 4-inch Exhaust Sidewall Vent Terminator (Hood) and 4-inch Wall Thimble:
4-inch Exhaust Sidewall
Vent Terminator
(Hood)
4-inch
Wall Thimble
Discription
Part#
4" Wall Thimble (4"-7")
4" Wall Thimble (5"-10")
9008345005
9008346005
9007999005
4" Exhaust Sidewall Vent Terminator (Hood)
4" Exhaust Sidewall Vent Terminator (Hood)
+ 4" Wall Thimble (4"-7")
4" Exhaust Sidewall Vent Terminator (Hood)
+ Wall Thimble (5"-10")
9008004005
9008005005
They are used when venting out through the wall. These terminations are special stainless steel
vents for gas appliances and are UL listed as Category II, III and IV. For different wall thicknesses,
there are two ranges of lengths available. (Refer to the NovaVent brochure for details.) Install these
vent terminations in accordance with their installation instructions and any applicable local codes.
6. 3-inch Concentric PVC Termination: 9007611005 (TH-CVPVC33)
Used when terminating direct-vent (sealed combustion)
systems, with Indoor models that require a 3 in. (76 mm)
intake and a 3 in. (76 mm) exhaust. This concentric
termination provides the convenience of only having to
make one penetration through a sidewall instead of two
separate penetrations for the intake and exhaust piping. The
termination includes a bird screen, restricting small animals,
pests, and foreign objects from entering into the vent system.
33
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Owner's Guide
Owner's Guide
CONGRATULATIONS
Congratulations and thank you for choosing our tankless water heater.
Before use, we recommend that you read through this safety manual
carefully. Please refer to the back of the manual for details about the
warranty. Keep this manual for future reference.
If you lose the manual, contact the manufacturer or your local
distributor. When you call, please tell us the model number and the
serial number of your unit written on the rating plate of the water
heater.
34
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Owner's Guide
Operating Safety
OPERATING SAFETY
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
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 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.
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. Forced or attempted repair may result in
a fire or explosion.
D. Do not use this water heater if any part has been under water. Immediately call a qualified service
technician to inspect the water heater and to replace any damaged parts.
OPERATING INSTRUCTIONS
1. STOP! Read the safety information above or in the Owner's Manual.
2. Turn off all electric power to the water heater.
3. Do not attempt to light the burner by hand.
4. Turn the manual gas valve located on the outside of the unit clockwise to the OFF position.
5. Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in the safety
information above on this label. If you don't smell gas, go to next step.
6. Turn the manual gas valve located on the outside of the unit counterclockwise to the ON position.
7. Turn on all electrical power to the water heater.
8. If the water heater will not operate, follow the instructions “to Turn Off Gas to water heater" and
call your service technician or gas supplier.
TO TURN OFF GAS TO APPLIANCE
1. Turn off all electric power to the water heater if service is to be performed.
2. Turn the manual gas valve located on the outside of the unit clockwise to the OFF position.
35
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Owner's Guide
Operating Safety
DANGER
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.
Keep flammable products:
1. Far away from 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
Read and follow water heater warnings and instructions. If owner’s manual is missing,
contact the manufacturer.
WARNING
The outlet hot water temperature of the water heater is factory set at 120 °F (49 °C).
Use this heater at your own risk. The set outlet water temperature can cause severe burns instantly or
death from scalding. Test the water before bathing or showering.
Do not leave children or an infirm person in the bath unsupervised.
DANGER
Hot Water Heater temperature over 125 °F (52 °C) can cause severe burns
instantly or death from scalding. Children, disabled and the elderly are at
the highest risk of being scalded. Feel water temperature before bathing or
showering. Temperature limiting valves are available. Ask a professional.
WARNING: 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.
36
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Owner's Guide
Normal Operation
NORMAL OPERATION
DISPLAY OF THE CONTROLLER
The illustration below shows an example of the display of the controllers. The exact display may differ from examples.
"INFO" Button
Display for Temperature
Each time the button is pressed,
the operation mode is selected
in the following sequence.
Inlet water
temperature
Outlet water
temperature
When the STAND BY LED is ON, the
hot water set temperature will be
displayed.
"HOT" Button
"COLD" Button
Water
flow
IN USE LED (Green)
Press the "HOT" button or the "COLD"
button to set the hot water temperature.
This lights during combustion.
"ON/OFF" Button
STAND BY LED (Orange)
Press this button to start
or stop operation.
The indicator turns on when the
heater is ready for operation.
The controllers indicate the remote controller (9008172005/TM-RE40) and the
temperature controller attached to a surface of the 140 Indoor (T-H3M-DV) model.
NOTICE
GENERAL
CAUTION
Temperature above 125 °F (52 °C) can cause severe burns or death from scalding.
Children, disabled and the elderly are at high risk of being injured.
1. Open a hot water tap. 2. Mix cold water with the hot to get 3. Close the water taps.
the correct temperature water.
• Flow rate to activate the water heater: 0.5 gallon per minute at the default set temperature (1.9 L/min).
• Flow rate to keep the water heater running: 0.4 gallon per minute (1.5 L/min)
• The controllers have an energy saving mode. Five minutes after the water heater
stops operating, the backlight of the controller turns off.
• The backlight of the controller will turn back on once the water heater begins
firing again.
• This water heater is an on-demand, tankless water heater designed to efficiently
supply endless hot water without reference to temperature settings.
TEMPERATURE TABLE OF THE CONTROLLER
°F
100 105 110 115 120* 125 130 135 140
°C
38
40
43
45
50*
*Factory setting (Default)
37
Page
52
55
57
60
Owner's Guide
Normal Operation
TEMPERATURE SETTINGS
-Using Remote controllerOperation
Screen on the controller
1.
Turn on the 120 VAC power supply to the water
heater.
2.
Press the "ON/OFF" button on the controller in
order to turn the controller on.
3.
When ON, the STAND BY LED is lit.
4.
It shows the set temperature on its display as shown
in the picture on the right. (EX.: 120 °F)
5.
Press the "HOT" button or the "COLD" button to set
the temperature setting of the unit.
(EX.: 120 °F)
-Temperature setting on the PCB(Without Remote controller)
There are 2 preset temperatures (120 °F (49 °C) and 140 °F (60 °C)) that you can select from by changing
the DIPswitch settings on the computer board without the remote controller. See the table below.
When the remote controller is in normal operation, the set temperature of the remote controller is given
priority over the set temperature of the DIPswitch settings.
• The temperature has been preset at the factory to 120 °F (49 °C).
Computer board
120 °F (49 °C)
DEFAULT
140 °F (60 °C)
ON 1 2 3 4 5 6 7 8 9 10
ON
OFF
OFF
No. 9 : OFF
1 2 3 4 5 6 7 8 9 10
Bank of
DIPswitches
No. 9 : ON
NOTE: Only change the switches with dark squares. The dark squares
indicate the direction the DIPswitches should be set to.
38
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Owner's Guide
Normal Operation
ADDTIONAL FEATURES
-Information modeYou can get some information about the water heater condition by pressing the "INFO" button. For more
information, follow the procedures below:
Operation
Screen on the controller
1.
Inlet water temperature will be displayed on the
controller by pressing the "INFO" button.
Inlet water temperature
(EX.: 60 °F)
2.
Outlet water temperature will be displayed on the
controller by pressing the "INFO" button.
Outlet water temperature
3.
Water flow rate, in gpm, will be displayed on the
controller by pressing the "INFO" button.
Water flow
(EX.: 3.5 GPM)
4.
Press the "INFO" button to finish information mode.
(EX.: 120 °F)
When the water heater is connected with the remote controller, the temperature
controller will not operate temperature settings, as only work for the information
mode (Indoor models only).
-Unit conversion modeThe controller display information can be changed from English Units to S.I. / metric units.
Please follow the procedures below:
Operation
Screen on the controller
1.
Press the "ON/OFF" button on the controller in
order to turn the controller on.
2.
When ON, the orange LED is lit.
3.
The previous set temperature will be displayed on
the screen.
4.
Press the "INFO" buttons for at least 3 seconds.
5.
The set temperature should now be displayed in the
alternate unit of measurement.
39
Page
(EX.: 100 °F)
(EX.: 38 °C)
Owner's Guide
Normal Operation
FLOW
• The flow rate through the water heater is limited to
a maximum of 7.0 GPM (26.5 L/min).
• The temperature setting, along with the supply
temperature of the water will determine the flow
rate output of the water heater.
• Please refer to the temperature vs. gallons per
minute charts on p. 54 to determine the likely flow
rates based on your local ground water temperature
and your desired outlet water temperature.
• Based on the United States Department of Energy
method of testing water heater output, the water
heater is rated for gallons per minute (GPM) (liters
per minute (L/min)) for Natural Gas and Propane,
when raising the water temperature by 77 °F
(43 °C) (from 58 °F to 135 °F (14 °C to 57 °C)).
See the chart on the right.
• Refer to the table to the top right for typical
household plumbing fixture flow rates to determine
what the water heater can do in a household
application.
Household Flow Rates
Flow rate
Appliance/Use
GPM (US)
L/min
Lavatory Faucet
1.0
3.8
Bath Tub
4.0 – 10.0 15.2 - 37.8
Shower
2.0
7.5
Kitchen Sink
1.5
5.6
Dishwasher
1.5
5.6
Washing machine
4.0
15.2
Taken from UPC 2006
Unit: GPM (L/min)
Model
Flow rate
Indoor
3.0 (11.2)
140 (T-H3M)
Outdoor
FREEZE PROTECTION SYSTEM
• This water heater comes equipped with heating blocks to protect it against damage associated with
freezing.
• For this freeze protection system to operate, there has to be electrical power to the water heater.
Damage to the heat exchanger caused by freezing temperatures due to power loss is not covered
under the warranty. In cases where power losses can occur, consider the use of a backup power supply.
• The freeze protection system will activate when the freeze protection thermostat senses temperatures
at 36.5 °F (2.5 °C) or lower.
• For the 140 Indoor (T-H3M-DV) model:
• In any areas subject to freezing temperatures, the manufacturer highly recommends an indoor
installation with an indoor model. In such an installation, freezing issues can only occur if cold
air enters through the venting into the heat exchanger, whether by negative pressures within
the installation location or by strong outside winds.
• The manufacturer also highly recommends the use of a backflow preventer (sold separately)
to minimize the amount of cold air entering through the exhaust venting when the water
heater is off.
• It is the installer’s responsibility to be aware of freezing issues and take all preventative measures. The
manufacturer will not be responsible for any damage to the heat exchanger as a result of freezing.
• If you will not be using your heater for a long period of time:
1. Completely drain the water out of the water heater. Refer to p. 41.
2. Disconnect power to your heater.
This will keep your water heater from freezing and being damaged.
CAUTION
Only pipes within the water heater are protected by the freeze protection
system. Any water pipes (hot or cold) located outside the water heater will not
be protected. Properly protect and insulate these pipes from freezing.
40
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Owner's Guide
Normal Operation
MAINTENANCE AND SERVICE
WARNING
Turn off the electrical power supply and close the manual gas shutoff valve
and the manual water control valve before servicing.
•
•
•
•
•
Clean the cold-water inlet filter. (Refer to the Unit Draining and Filter Cleaning Section on this page.)
Be sure that all openings for combustion and ventilation air are not blocked.
The venting system should be checked annually for any leaks, corrosion, blockages or damage.
The burner should be checked annually for dust, lint, grease or dirt.
Keep the area around the water heater clear. Remove any combustible materials, gasoline or any
flammable vapors and liquids.
• In accordance with all local codes and common safety practices, water discharged from the pressure
relief valve can cause severe burns instantly from scalding. DO NOT touch the pressure relief valve.
• If the relief valve discharges periodically, it may be due to thermal expansion in a closed water supply
system. Contact the water supplier or local plumbing inspector on how to correct this situation.
• Visual check of burner flames (see below) through the burner window in the burner assembly located
at the middle of the water heater.
The manufacturer recommends having the water heater checked once a year or as necessary by a licensed
technician. If repairs are needed, any repairs should be done by a licensed technician.
Flame
blowing up
Blue flame
Satisfactory
Red or Yellow
flame
Unsatisfactory
Unsatisfactory
UNIT DRAINING AND FILTER CLEANING
1. Close the manual gas shutoff valve.
2. Turn off power to the water heater and wait a couple of
seconds. Turn on again.
3.Wait 30 seconds, and then turn off power to the water
heater, yet again.
4. Close the water shutoff valve.
5. Open all hot water taps in the house. When the residual
water flow has ceased, close all hot water taps.
6. Have a bucket or pan to catch the water from the water
heater’s drain plugs. Unscrew the Small drain plug first
and unscrew the Large drain plug next to drain all the
water out of the water heater.
7.Wait a few minutes to ensure all water has completely
drained from the water heater.
8. Clean the filter: Check the water filter located within the
cold inlet. With a tiny brush, clean the water filter of any
debris which may have accumulated and reinsert the filter
back into the cold water inlet.
9. Securely screw the drain plugs back into place.
Hand- tighten only.
41
Page
Drain plug
with Filter (Large)
Drain plug
(Small)
Gas
valve
Water valve
Owner's Guide
Normal Operation
DESCALING THE UNIT
Hard water is a severe problem for the copper coils inside heat exchangers. Heat exchanger failure due
to scale buildup from hard water conditions is NOT covered by warranty. It is highly suggested that a
scale inhibitor be installed before the cold water inlet after this procedure is done.
1) TOOLS ‐ Gather the following materials:
Water
a. Pump: The pump should provide a minimum of 1
Heater
gpm through the heater.
b. Descaling Solution
c. Water hoses
H C
d. Bucket
2) SETUP ‐
Pressure Relief
a. Set the unit to its highest temperature setting.
Valve
b. Open multiple hot water fixtures to run
Gas Supply
Isolation
a large volume of water through the water
B
Valve
heater. Allow the unit to run at its full
A
Isolation Valve
C
D Hose 1
firing rate for at least 2 minutes.
c. While the water heater is still firing, disconnect
power to the water heater.
Pump
Hose
2
d. Shut off all the open hot water fixtures.
Inlet Hose
3) WATERLINES – Assuming isolation valves with drain
(may or may not be needed,
depending on type of pump.)
ports are installed.
a. Isolate the water heater by closing the incoming/
Descaling Solution
outgoing water isolation valves C and D.
b. Relieve pressure within the water heater by
temporarily opening up the pressure relief valve.
c. Drain the water heater and connect hoses/pump to the
drain ports of the isolation valves: Outlet of the
pump to valve B (cold side), and another hose from valve A (hot side) to the bucket.
4) PUMP and DESCALE –
a. Fill the bucket with 5 gallons of diluted solution. Dilution ratio depends on the
cleaning/descaling solution used.
b. Place the pump into the bucket if it is submersible, or use an inlet hose into the bucket if it is not submersible.
c. Open valves A and B.
d. Circulate descaling solution through the water heater for 45 minutes or until return water is
cleared.
5) CLEANSE THE SYSTEM – Flush the chemicals out of the heat exchanger with fresh water.
a. Close valve B.
b. Open valve D and run fresh water through the water heater and drain out of Hose 2 for 15 minutes.
c. Close all valves, relieve pressure from the water heater with the pressure relief valve, and
clean the inlet water filter with fresh water.
d. Once the water heater is flushed and cleansed, replace the water filter, open C and D, and
reconnect power to the water heater.
e. Change the temperature setting back to the desired temperature.
42
Page
Owner's Guide
Troubleshooting
TROUBLESHOOTING
GENERAL
TEMPERATURE and AMOUNT OF HOT WATER
PROBLEM
SOLUTIONS
It takes a long time to • The time it takes to deliver hot water from the water heater to your
get hot water at the
fixtures depends on the length of piping between the two. The longer
fixtures.
the distance or the bigger the pipes, the longer it will take to get hot
water.
• If you would like to receive hot water to your fixtures quicker, you may
want to consider a hot water recirculation system. (p. 29)
The water is not hot • Compare the flow and temperature. See the charts on p. 54.
enough.
• Check cross plumbing between cold water lines and hot water lines.
• Is the gas supply valve fully open? (p. 31)
• Is the gas line sized properly? (p. 21)
• Is the gas supply pressure sufficient? (p. 20 and 22)
• Is the set temperature set too low? (p. 37 to 39)
The water is too hot. • Is the set temperature set too high? (p. 37 to 39)
The hot water is not • Make sure the unit has 120 VAC, 60 Hz power supply.
available when a
• If you are using the remote controller and/or temperature controller, is
fixture is opened.
the power button turned on?
• The time it takes to deliver hot water from the water heater to your
fixtures depends on the length of piping between the two. The longer
the distance or the bigger the pipes, the longer it will take to get hot
water.
• Is the gas supply valve fully open? (p. 31)
• Is the water supply valve fully open? (p. 31)
• Is the filter on cold water inlet clean? (p. 41)
• Is the hot water fixture sufficiently open to draw at least 0.5 GPM
(1.9 L/min) through the water heater? (p. 37)
• Is the unit frozen? (p. 40)
• Is there enough gas in the tank / cylinder? (For Propane model)
• Is it plumbed backwards with reverse plumbing?
The hot water turns • Is the flow rate enough to keep the water heater running? (p. 37)
cold and stays cold. • If there is a recirculation system installed, does the recirculation line have
enough check valves? (p. 29)
• Is the gas supply valve fully open? (p. 31)
• Is the filter on cold water inlet clean? (p. 41)
• Are the fixtures clean of debris and obstructions?
Fluctuation in hot
water temperature.
•
•
•
•
Is the filter on cold water inlet clean? (p. 41)
Is the gas line sized properly? (p. 21)
Is the supply gas pressure sufficient? (p. 20 and 22)
Check for cross connection between cold water lines and hot water lines.
43
Page
Owner's Guide
Troubleshooting
PROBLEM
Remote controller
WATER HEATER
Unit does not ignite
when water goes
through the unit.
SOLUTIONS
•
•
•
•
•
•
Is the power on the water heater?
Is the gas on?
Is the flow rate over 0.5 GPM (1.9 L/min)? (p. 37)
Is the filter on cold water inlet clean? (p. 41)
Check for reverse connection and cross connection. (p. 22)
If you use the remote controller and/or temperature controller, is
the power button turned on? (p. 37 and 38)
Check if the inlet temperature is too high.
This is normal. After operation has stopped, the fan motor keeps
running from 15 to 70 seconds in order to re-ignite quickly, as well
as purge all the exhaust gas out of the flue.
Is the correct gas type of a water heater installed? (p. 6)
Are the DIPswitch settings for your altitude set correctly? (p. 28)
Check the flame quality. (p 41)
Is the intake or exhaust vent blocked? (p. 10)
Is the vent length and diameter correct? (p. 11 to 16)
Is the manifold pressure set correctly? (p. 4)
Contact the manufacturer at 1-877-737-2840.
•
The fan motor is
•
still spinning after
operation has stopped.
Abnormal sounds from •
the water heater.
•
•
•
•
•
Unit sounds abnormal •
while in operation
Controller does not
• Make sure the water heater is supplied with power.
display anything when • Make sure the connection to the water heater is correct. (p. 26 and
the power button is
27)
turned on.
NOTICE:
When the water heater has not operated for five minutes or more,
the display of the controllers turns off to conserve energy.
When the remote
controller is turned
ON, STAND BY LED
is lit.
An ERROR code is
displayed.
• Please see p. 45 to 47.
44
Page
Owner's Guide
Troubleshooting
ERROR CODES
-General-
• The water heater has self-diagnostics for safety and convenience when troubleshooting.
• If there is a problem with the water heater itself, or the installation of the unit, the error code will be
displayed on the temperature controller and remote controller.
• Consult with the table on the following pages for the description of each error code.
Error code indicator on the temperature
controller attached to a surface of the 140
Indoor (T-H3M-DV) model and the remote
controller 9008172005 (TM-RE40).
Green LED
Example: If your unit has the “321” error code (which signifies an inlet thermistor failure)
• Indicator on the controller : “321” will be displayed on the screen in its entirety.
• Green LED on the computer board: The green LED on the computer board will be
blinking two times.
45
Page
Error code
Owner's Guide
Troubleshooting
-Fault Analysis of Error Codes-
If the error code is displayed on the computer board of the water heater or remote controller and/or
temperature controller, please check the following. After checking, consult with the manufacturer.
Remote
031
101
111
121
311
321
341
Green
LED
Malfunction
description
Diagnosis
One Time
Incorrect DIPswitch • Check the DIPswitch settings on the PCB (Part #701).
setting
Five Times Warning for the
• Check if the gas type of the water heater matches
the gas supplied to it.
“991” error code
• Check if there is any blockage in the intake air and/
or exhaust.
• If the water heater is installed as a direct-vent
system, check whether there is enough distance
between the intake air terminal and the exhaust
terminal.
• Check the altitude/elevation of area of where the
water heater is installed and match the appropriate
DIPswitches.
• Check if there is grease and/or dirt in the burner (Part
#101) and the fan motor (Part #103), especially if the
water heater has been installed in a contaminated area.
• Check if the DIPswitches match gas type of the water
heater.
• Check the manifold pressure at Max. and Min.
• Check combustion chamber tube (Part #117) to make
sure it is clear and securely installed.
Three Times Ignition failure
• Check if the Hi-limit switch (Part #411) is properly
functioning.
• Check for connection/breakage of wires (Part #412, 707,
708, 709 710), burn marks on the computer board (Part
#701), and/or soot on the flame rod (Part #108).
• Check if there is a buzzing spark ignition sound
coming from the burner (Part #101) when water
heater prepares for combustion.
• Listen for the double “clunk” sound coming from gas
valve assembly (Part #102) when the water heater
goes into combustion.
• Check if there is leaking from heat exchanger (Part #401).
• Check that the gas is turned on.
• Check gas supply.
Three Times Loss of flame
• Check if the Hi-limit switch (Part #411) is properly
functioning.
• Check for connection/breakage of wires (Part #412,
707, 708, 710), burn marks on the computer board
(Part #701), and/or soot on the flame rod (Part
#108).
• Check if there is leaking from heat exchanger (Part #401).
• Check gas supply.
Two Times Outlet thermistor
failure
• Check for connection/breakage of wires and/or
Two Times Inlet thermistor
failure
debris on thermistor (Part #407, 408, 715).
Two Times Exhaust thermistor • Check the resistance.
failure (Indoor
models only)
46
Page
Owner's Guide
Troubleshooting
Remote
Green
LED
Malfunction
description
Diagnosis
391
Two Times
510
Six Times
551
Six Times
611
Four Times
701
711
One Time
One Time
Computer board fault • Check for connection/breakage of wires (Part #711).
Gas solenoid valve • Refer to the 111 and 121 error codes.
drive circuit failure
721
Six Times
False flame
detection
• Check if there is leaking from heat exchanger (Part #401).
741
N/A
751
N/A
Miscommunication
between water
heater and remote
controller
Miscommunication
between water heater
and temperature
controller (Indoor
• Check the model type of the remote controller.
• Inspect the connections between the water heater
and remote controller.
• Check the power supply of the water heater.
• Inspect the connections between the water heater
and temperature controller.
• Check the power supply of the water heater.
941
Five Times
991
Five Times
Air-fuel ratio rod
• Check for connection/breakage of wires (Part #708)
failure
and/or soot on the AFR rod (Part #108).
Abnormal main gas • Check for connection/breakage of wires (Part #707)
solenoid valve
and/or burn marks on the computer board (Part #701).
• Check for signs of vent corrosion.
• Check gas valve contacts and gas valve wire harness
connections for signs of rust or corrosion.
Abnormal gas
• Check for connection/breakage of wires (Part #707)
and/or burn marks on the computer board (Part #701).
solenoid valve
• Check gas valve contacts and gas valve wire harness
connections for signs of rust or corrosion..
Fan motor fault
• Check for connection/breakage of wires, dust buildup
in the fan motor (Part #103) and/or burn marks on
the computer board (Part #701).
• Check for frozen/corrosion of connectors (Part #103).
model only)
Abnormal exhaust • Check to see of the exhaust temperature is higher
temperature (Indoor
than 149°F (65°C).
model only)
Imperfect
combustion
• Check if the gas type of the water heater matches
the gas supplied to it.
• Inspect the environment around the water heater.
Determine how long the water heater has been
installed and match DIPswitches.
• Check the altitude/elevation of the area of where
the water heater is installed.
• Check if there is any blockage in the intake air and/
or exhaust.
• If the water heater is installed as a direct-vent
system, check whether there is enough distance
between the intake air terminal and the exhaust
terminal.
• Check if there is grease and/or dirt in the burner (Part
#101) and the fan motor (Part #103), especially if the
water heater has been installed in a contaminated area
• Check the DIPswitches match gas type of the water
heater.
• Check the manifold pressure at Max. and Min.
• Check combustion chamber tube (part #117) to see if it
is clear and securely installed.
47
Page
Owner's Guide
Components Diagram
COMPONENTS DIAGRAM
Case assembly
Indoor model
003
Outdoor model
052
052
007
004
004 052
001
714
001
704
006
702
704
005
052
050 002
002
Temperature controller
Temperature
remote controller
Indoor model
722
721
724
721
723
056
48
Page
Owner's Guide
Components Diagram
Computer board assembly
701
709
707
710
103
711
716
708
402
408
for
Indoor model
407
for
Outdoor model
713
706
402
060
Surge box assembly
120
053
712 710
703
705
701
712
49
Page
Owner's Guide
Components Diagram
Burner assembly
Burner assembly
101
104
115
053
053
108
107
401
106
116
708
053
110
061
109
102
111 709
112
117
053
103
105
Manifold
assembly
114
113
053
064
707
054
150
119
120
709
151
057
055 062
053
055
117
051
711
50
118
Page
Owner's Guide
Components Diagram
Water Way assembly
Outdoor Model
Indoor Model
417
455 467
412
063
154
452
063
417
463 455
063
458
463
152
455
B
418
467
455
E
455
458
467
455
A
458
455
A
053
463
455
467
063
458
153
463
B
419 465
466 064
715
464
413
450 053 for Indoor model
A
053
451 413
401
B
411 058
E
451
C
414
460
462
468
052
461
D
451
408
059
403
052
51
Page
402
459
D
457
456 406
404
405
416
409
415
414
453
457
C
451 413
458
455
454
410
416
052 453
059
407
Owner's Guide
Parts List
PARTS LIST
Item #
001
002
003
004
005
006
007
050
051
052
053
054
055
056
057
058
059
060
061
062
063
064
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
Part #
Description
Case assembly for Indoor model
Case assembly for Outdoor model
Front cover for Indoor
Front cover for Outdoor
Intake air port assembly
Bracket
Junction box
Power supply cord assembly
Back guard panel
Screw M4×12 (W/Washer)
Screw M4×10 (W/Washer)
Screw M4×10 (Coated)
Screw M4x10
Hex head screw M4×12 (W/Washer)
Hex head screw M4x8
Pan screw M4X20
Tap tight screw M4x12 FEZN
Screw M3x6 SUS
Screw M4x6
Screw M3x6
Pan screw M4x8
Wire clamp 60
Screw M4x10
Screw M3x6 SUS3
Burner assembly
Manifold with gas valve assembly LP
Manifold with gas valve assembly NA
Fan motor for Indoor model
Fan motor for Outdoor model
Burner gasket
Fan damper for Indoor model
Fan damper for Outdoor model
Burner window
Rod holder gasket
Flame rod
Igniter rod
Rod holder
Rod cap
Burner damper Indoor
Burner damper Outdoor
Manifold gasket A
Manifold gasket B
Burner holder gasket
Pressure port
Combustion chamber tube
Gas inlet
Gas inlet ring
Surge box plate
52
Page
140 model
T-H3M model
N/A
N/A
N/A
N/A
320273-350
N/A
319143-510
320273-352
N/A
319143-025
319143-325
319143-026
319143-060
319143-326
319143-063
N/A
319143-201
319143-087
319143-328
N/A
319143-059
319143-048
320273-497
319143-330
320273-353
320273-354
320273-356
319143-443
319143-043
319143-031
320273-557
319143-282
319143-033
319143-034
319143-517
320273-357
319143-036
320273-358
320273-359
320273-360
319143-044
319143-045
319143-032
319143-042
319143-344
320273-362
319143-049
N/A
EK450
EK451
EK452
EK453
EK454
EK455
EK190
EK456
EK457
EW000
EW001
EW002
EW003
EW004
EW005
EW018
EKK31
EW00A
EW009
EK191
EW00D
EM167
EW00P
EW00B
EK458
EK459
EK460
EK109
EKK25
EKK2X
EK491
EM381
EKK2V
EKK2W
EK193
EK461
EKK32
EK462
EK463
EK464
EKK2Y
EKK2K
EKK0G
EKK2D
EX019
EK465
EKK2Z
EK466
Owner's Guide
Parts List
Item #
Part #
Description
140 model
T-H3M model
150
151
152
153
154
401
O-ring P18 NBR (Black)
O-ring P20 NBR (Black)
Silicon ring for Outdoor model
Exhaust port for Outdoor model
Silicon ring
Heat exchanger assembly for 140 Indoor and Outdoor
319143-350
319143-057
319143-370
319143-121
319143-065
320273-556
EZP18
EK042
EK442
EX13J
EKN50
EK467
402
403
404
405
406
407
408
409
410
411
Flow adjustment valve / Flow sensor
Condensate drain port
Water inlet
Inlet drain plug
Inlet water filter
Inlet thermistor
Outlet thermistor
Water outlet
Outlet drain plug
Hi-Limit switch
319143-463
319143-018
319143-193
319143-197
319143-198
319143-214
319143-529
319143-466
319143-199
319143-228
EK129
EKH23
EKK1U
EKK2B
EKK2C
EKK4J
EK207
EK104
EKK2E
EM212
412
413
414
415
416
417
319143-067
320273-364
320273-365
320273-366
319143-468
320273-553
320273-554
320273-367
N/A
EX02A
EK468
418
419
Overheat-cut-off fuse
Pipe heater
Inlet heater
Drain tube
Inlet heater
Secondary heat exchanger for Indoor model
Secondary heat exchanger for Outdoor model
Secondary heat exchanger heater
Heater fixing plate
450
451
452
453
454
455
456
457
458
459
460
461
462
Pipe heater fixing plate
Heater fixing plate 16
Fuse fixing plate
O-ring P4 FKM
O-ring P6 FKM
O-ring P14 FKM
O-ring P15 FKM
O-ring P16 FKM
Fastener “14-22”
Fastener “16A”
Fastener “16-25A”
Flat heater
Cold pipe for 140 model
N/A
319143-125
N/A
319143-082
319143-080
319143-100
319143-091
319143-083
319143-105
319143-226
319143-205
319143-535
320273-555
EK475
EK031
EK476
EZF04
EZF06
EZF14
EZF15
EZF16
EKK24
EM192
EKK39
EK217
EK477
463
464
Header connection
Thermistor fixing plate
320273-368
319143-106
EK478
EX13H
465
466
467
Exhaust thermistor gasket
Hi-limit switch for exhaust
Gasket
Inlet pipe packing
319143-111
319143-104
319143-542
320273-558
EX13L
EKH6G
EK229
EK479
468
53
Page
EK469
EK470
EK105
EK471
EK472
EK473
EK474
Owner's Guide
Parts List
Item #
Part #
Description
140 model
T-H3M model
701
Computer board
320273-369
EK480
702
703
704
707
708
709
710
Rubber grommet
Surge box
120 VAC wire for Indoor model
120 VAC wire for Outdoor model
120 VAC Power ON-OFF switch
Remote controller wire for Indoor model
Remote controller wire for Outdoor model
Gas valve wire
Flame rod wire
Igniter assembly
Freeze protection thermostat
319143-426
320273-128
319143-427
319143-546
319143-141
320273-376
319143-473
320273-379
320273-380
320273-381
319143-185
EX148
EK280
EK146
EK143
EKK4V
EK481
EK138
EK482
EK483
EK484
EKJ59
711
712
713
714
715
716
Proportional gas valve wire
Nylon clamp FC6
Computer board cover
Cable clamp for Indoor model
Exhaust thermistor for Indoor model
Exhaust Hi-limit switch wire
319143-481
N/A
319143-191
319143-500
319143-131
319143-501
EK112
EX004
EKK1M
EX13C
EKH6E
EK180
721
722
723
724
Temperature controller for Indoor model
Fixing plate
Temperature remote controller
Remote controller connection wire
320273-684
N/A
319143-485
320273-512
EK487
EK490
TM-RE40
EK489
705
706
OUTPUT TEMPERATURE CHART
Chart is based on properly sized gas line
140 (T-H3M) model
Output Hot Water GPM
Output Temperature vs. GPM ( Max. 7.0 GPM ) with Various Inlet Water Temperature
8.0
40
50
60
70
6.0
4.0
2.0
100
105
110
115
120
125
130
135
140
40
3.8
3.5
3.2
3.0
2.8
2.7
2.5
2.4
2.3
50
4.6
4.1
3.8
3.5
3.3
3.0
2.9
2.7
2.5
60
5.7
5.1
4.6
4.1
3.8
3.5
3.3
3.0
2.9
70
7.0
6.4
5.6
5.0
4.5
4.1
3.8
3.5
3.2
Incoming
Temp.(°F)
0.0
Set Temp. (°F)
54
Page
Owner's Guide
Warranty
LIMITED WARRANTY
1. The manufacturer warrants this product against defects in materials or workmanship as described in this
document if installed within the United States or Canada. The manufacturer or its authorized Service
Representative will, at its sole discretion, repair or replace any failed or defective mechanical or electrical parts,
or components thereof, or, if the manufacturer or its authorized Service Representative cannot replace said
parts, and repair is not commercially practicable, the manufacturer or its authorized Service Representative will
refund the purchase price. The manufacturer or its authorized Service Representative may, at its sole discretion,
use new, refurbished or reconditioned parts.
2. Warranty for all models:
Application Type
Heat Exchanger
Parts
[Unit: Year]
Labor(1)
Single Family Domestic Hot Water
15(2)(3)
Commercial or Multi-Family Domestic Hot Water
10(2)(3)
5
1
(3)(4)
Heating
10
(1) Limited Labor Coverage
• The manufacturer will provide for reasonable labor charges associated with warranty repairs or replacements within
one (1) year from the date of purchase. The manufacturer will only pay directly to the service provider.
• Warranty service must be performed by an authorized Service Representative. A list of authorized Service
Representatives is available upon request.
• All warranty claims and warranty service must be authorized and approved by the manufacturer.
(2) Includes recirculation and storage tank applications with proper circulation pump control (e.g. aquastat and/ or timer).
- Lack of a proper pump control will reduce the heat exchanger and parts warranty to 3 years.
(3) In all applications, the total of length of operation time must be less than 3,000 hours for the 140 (T-H3M) model.
(4) Includes dual-purpose applications (combination heating and domestic).
3. General terms of limited warranty:
This limited warranty gives you specific legal rights, and you may also have other rights which vary from State to
State. The manufacturer will honor the warranty to the original retail buyer at the original location only, within
the United States or Canada, and it is not transferable.
THIS WARRANTY COVERS ONLY FAILED MECHANICAL AND ELECTRICAL PARTS DUE TO FACTORY DEFECTS
UNDER NORMAL USAGE FOR THE PRODUCT’S INTENDED PURPOSES AND WITHIN THE APPLICABLE PERIOD
SPECIFIED IN THE TABLES ABOVE. ONLY DIRECT DAMAGES SHALL BE RECOVERABLE BY A CLAIMANT UNDER
THIS LIMITED WARRANTY AND, IN NO EVENT, WHETHER AS A RESULT OF BREACH OF CONTRACT, BREACH OF
WARRANTY, TORT LIABILITY (INCLUDING NEGLIGENCE), STRICT LIABILITY, INDEMNITY OR OTHERWISE WILL
BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR INDIRECT CONSEQUENTIAL DAMAGES INCLUDING PROPERTY
DAMAGE, PERSONAL DAMAGES, LOSS OF USE, OR INCONVENIENCE. SOME STATES DO NOT ALLOW THE
EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION MAY
NOT APPLY TO YOU.
4. Limitation on Duration of Implied Warranties:
ANY IMPLIED WARRANTIES ARISING UNDER STATE LAW, INCLUDING THE IMPLIED WARRANTIES OF FITNESS
FOR A PARTICULAR PURPOSE AND MERCHANTABILITY, SHALL IN NO EVENT EXTEND PAST THE EXPIRATION OF
ANY WARRANTY PERIOD HEREUNDER. SOME STATES DO NO ALLOW LIMITATIONS ON HOW LONG AN IMPLIED
WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
5. THIS WARRANTY WILL NOT COVER THE FOLLOWING:
• Any product that is not installed by a licensed plumber, gas installer, or contractor.
• Damages due to accidents, abuse, misuse, improper installation, misapplication, or incorrect sizing.
• Damages due to fires, flooding, freezing, electrical surges, or any Acts of God.
• Damages due to unauthorized alterations, attachments, and/or repairs.
• Damages due to a lack of maintenance (e.g. water filter, water treatment system, vent blockage, etc.).
• Any product installed in an improper environment (e.g. corrosive, dusty, chemically contaminated,
excessive lint, etc.).
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• Freeze damage that occurs without taking proper preventive measures as described in the installation
manual.
• Condensate damage due to improperly installed or lack of a condensate trap (drain).
• Any product not installed in compliance with all applicable local & provincial codes, ordinances, and
good trade practices.
• Any product sold to or installed in areas outside of the fifty states (and the District of Columbia) of
the United States of America and Canada.
• Any product installed in applications that cause the water heater to activate more than 300 times per
day. (This averages to an activation every 5 minutes in a 24-hour period.)
• Any failures that are not due to defects in materials or workmanship (mechanical and/or electrical parts).
• Damages due to improper installation:
• Gas: incorrect gas pipe sizing, incorrect gas meter sizing, incorrect gas type, and/or gas pressures
that fall outside the product’s specified range.
• Water: incorrect water pipe sizing, water pressures that fall outside the product’s specified range,
recirculation flow rates that fall outside the product’s specified range (air removal), and/or lack of
proper methods of air removal in a closed-loop, circulation system. (See installation manual for
details.)
• Electric: supply power voltages that fall outside the product’s specified range.
• Damages due to water quality:
• Introduction of liquids other than potable water or potable water / glycol mixtures into the product.
• Introduction of pool water, spa water, or any chemically treated water into the product.
• Introduction of hard water measuring more than 7 grains per gallon (120 ppm) for single family
domestic applications or more than 4 grains per gallon (70 ppm) for all other types of applications
into the product.
• Introduction of untreated or poorly treated well water into the product.
• Introduction of water with pH levels less than 6.5 and greater than 8.5 into the product.
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