On-Demand Water Heater
Installation Manual and Owner’s Guide
ANSI Z21.10.3 and CSA 4.3
Models
• |
240 |
Indoor (T-H3J-DV) |
• |
240 |
Outdoor (T-H3J-OS) |
• |
340 |
Indoor (T-H3S-DV) |
• |
340 |
Outdoor (T-H3S-OS) |
• |
540 |
Indoor (T-H3-DV) |
• |
540 |
Outdoor (T-H3-OS) |
540 (T-H3) model only
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
•EASY-LINK SYSTEM AND
MULTI-UNIT SYSTEM
(540 (T-H3) model only)
If the information in these instructions is not followed exactly, a fire or explosion may
WARNING result causing property damage, personal injury or death.
-Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
-WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any 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
Contents
CONTENTS |
|
Installation Manual |
|
SPECIFICATIONS........................................................................................................................... |
4 |
INTRODUCTION........................................................................................................................... |
5 |
SAFETY GUIDELINES.................................................................................................................... |
6 |
INSTALLATION.............................................................................................................................. |
7 |
General..................................................................................................................................... |
7 |
Clearances................................................................................................................................ |
9 |
Included accessories................................................................................................................ |
9 |
Optional items.......................................................................................................................... |
9 |
Warning for installations........................................................................................................ |
11 |
High-altitudeinstallations...................................................................................................... |
12 |
Ventinginstructions............................................................................................................... |
13 |
Gas supply and gas pipe sizing............................................................................................... |
25 |
Water connections................................................................................................................ |
27 |
Condensate drain.................................................................................................................. |
28 |
Electrical connections............................................................................................................ |
30 |
Temperature remote controller............................................................................................ |
31 |
Easy-Link System.................................................................................................................... |
33 |
Multi-Unit System.................................................................................................................. |
37 |
APPLICATIONS............................................................................................................................ |
38 |
INITIAL OPERATION................................................................................................................... |
40 |
Owner's Guide |
|
OPERATING SAFETY................................................................................................................... |
42 |
NORMAL OPERATION................................................................................................................ |
44 |
Temperature controller and Remote controller..................................................................... |
44 |
General................................................................................................................................... |
44 |
Temperature settings............................................................................................................. |
45 |
Temperature table of controller............................................................................................. |
45 |
Additionalfeatures................................................................................................................. |
46 |
Temperature settings on the PCB (Without remote controller)............................................ |
47 |
Flow....................................................................................................................................... |
48 |
Freeze protection system....................................................................................................... |
48 |
Maintenance and service....................................................................................................... |
49 |
Unit draining and filter cleaning............................................................................................ |
49 |
TROUBLESHOOTING................................................................................................................... |
50 |
General................................................................................................................................... |
50 |
Error codes............................................................................................................................ |
52 |
COMPONENTSDIAGRAM........................................................................................................... |
55 |
PARTS LIST..................................................................................................................................... |
59 |
OUTPUT TEMPERATURE CHART.................................................................................................. |
62 |
LIMITED WARRANTY.................................................................................................................. |
63 |
2 Page
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.
3 Page
Installation Manual
Specifications
SPECIFICATIONS
Model |
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240 |
240 |
340 |
340 |
540 |
540 |
|
|
|
Indoor |
Outdoor |
Indoor |
Outdoor |
Indoor |
Outdoor |
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(T-H3J-DV) (T-H3J-OS) |
(T-H3S-DV) (T-H3S-OS) |
(T-H3-DV) (T-H3-OS) |
||||
Natural Gas Input |
BTU/h |
Min.: 15,000 |
Min.: 15,000 |
Min.: 15,000 |
|||||
(Operating Range) |
Max.: 160,000 |
Max.: 180,000 |
Max.: 199,000 |
||||||
|
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Propane Input |
BTU/h |
Min.: 13,000 |
Min.: 13,000 |
Min.: 13,000 |
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(Operating Range) |
Max.: 160,000 |
Max.: 180,000 |
Max.: 199,000 |
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Gas Connection |
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3/4" NPT |
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Water Connections |
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3/4" NPT |
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Water Pressure* |
psi |
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15 - 150 (0.1 - 1) |
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(MPa) |
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Natural gas |
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" W.C. |
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Min. 5.0 (1.24) |
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Inlet Pressure |
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(kPa) |
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Max. 10.5 (2.61) |
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Propane |
|
" W.C. |
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Min. 8.0 (1.99) |
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Inlet Pressure |
|
(kPa) |
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|
Max. 14.0 (3.48) |
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|
||
Natural |
" W.C. |
1.50 |
1.70 |
2.45 |
2.1 |
2.95 |
2.70 |
||
Manifold |
Gas |
(Pa) |
(373) |
(423) |
(610) |
(523) |
(734) |
(672) |
|
Pressure** |
|
" W.C. |
2.10 |
1.90 |
2.7 |
2.55 |
3.3 |
3.15 |
|
Propane |
(Pa) |
(523) |
(473) |
(672) |
(635) |
(821) |
(784) |
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|
|
||||||||
Weight |
|
lbs. (kg) |
58 (26.3) |
58 (26.2) 58 (26.3) |
58 (26.2) |
59 (26.8) |
59 (26.9) |
||
Dimensions |
|
inch |
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H 22.4 x W 17.7 x D 10.7 |
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mm |
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H 570 x W 450 x D 272 |
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Ignition |
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Electric Ignition |
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Supply |
VAC / Hz |
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120 / 60 |
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Operation |
W / A |
72.7 / 0.61 |
78.2 / 0.65 |
89.0 / 0.74 |
|||||
Standby |
W / A |
3.1 / 0.03 |
3.1 / 0.03 |
4.2 / 0.04 |
|||||
Electric Consumption Freeze- |
|
W / A |
174 / 1.5 |
174 / 1.5 |
175 / 1.5 |
||||
Protection |
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*40 psi or above is recommended for maximum flow.
** The Manifold Pressure is the factory setting and generally 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.
4 Page
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 240 Indoor (T-H3J-DV), 340 Indoor (T-H3S-DV) and 540 Indoor (T-H3-DV) models are only to be installed indoors. The 240 Outdoor (T-H3J-OS), 340 Outdoor (T-H3S-OS) and 540
Outdoor (T-H3-OS) models are only to be installed outdoors.
•The principle behind tankless water heaters is simple:
Intake port |
Exhaust |
Exhaust thermistor |
Secondary |
|
heat exchanger |
|
Primary |
Thermistor |
heat exchanger |
Bypass valve |
Burners |
|
|
Water control valve |
Gas valves |
Computer board |
Fan motor |
Thermistor |
Flow sensor |
|
|
|
Condensate |
|
drain port |
Thermistor |
Gas |
|
|
|
|
|
Hot water outlet |
Cold water inlet |
|||
*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.
5 Page
Installation Manual
Safety Guidelines
SAFETY GUIDELINES
SAFETY DEFINITION
Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
DANGER
Indicates an imminently hazardous situation which, if not avoided, could result
in death or serious injury.
WARNING
Indicates an imminently hazardous situation which, if not avoided, could result CAUTION 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
FuelGasCode: ANSIZ223.1/NFPA54intheUSAorCAN/CSAB149.1NaturalGas,PropaneInstallation
Code in Canada.
2.Properly ground the unit in accordance with all local codes or in the absence of local codes, with the
National Electrical Codes: ANSI/NFPA 70 in the USA or CSA standard C22.1 Canadian 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 unit does not match your requirements, do not install and consult with the manufacturer.
5.If any problem should occur, turn off all hot water taps and turn off the gas. Then call a trained technician or the Gas Company or the manufacturer.
•Water temperatures over 125 °F (52 °C) can cause severe burns instantly or
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death from scalding. The water temperature is set at 120 °F (50 °C) from the |
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factory to minimize any scalding risk. Before bathing or showering always |
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check the water temperature. |
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WARNING |
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• |
Do not store or use gasoline or other flammables, vapors, or liquids in the |
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vicinity of this appliance. |
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• Do not reverse the water and/or gas connections as this will damage the gas |
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valves and can cause severe injury or death. Follow the diagram on p. 27 |
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when installing your water heater. |
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• |
Do not use this appliance if any part has been in contact with or been |
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immersed in water. Immediately call a licensed plumber, a licensed gas fitter, or a professional service technician to inspect and/or service the unit if necessary.
• Do not disconnect the electrical supply if the ambient temperature will drop below freezing. The Freeze Protection System only works if the unit has electrical power. The warranty will not be covered if the heat exchanger is damaged due to freezing. Refer to the section on the Freeze Protection
System on p. 48 for more information.
6 Page
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 unit 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 unit where the exhaust vent is pointing into any opening in a building or where the noise may disturb your neighbors. Make sure the vent termination meets the required distance by local code from any doorway or opening to prevent exhaust from entering a building. (Refer to p. 22.)
8.Particles from flour, aerosols, and other 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 unit is dustor debris-free. Regular maintenance is recommended for these types of environment.
9.The 240 Indoor (T-H3J-DV), 340 Indoor (T-H3S-DV), and 540 Indoor (T-H3-DV) are to be installed indoors only. These units are equipped with a thermistor and hi-limit switch for the exhaust gas, detecting excess temperatures within the flue and enabling the unit to safely stop operations 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, these components will enable the unit to
safely stop operations. These components are not installed on the outdoor models since the exhaust vent is built-in.
•The Indoor model requires a 3 in. or 4 in. make-up intake air supply pipe. The intake pipe must be sealed airtight.
•Air supply pipe can be made of ABS, PVC, CPVC, polypropylene, corrugated stainless steel, or
Category lll / IV stainless steel. Regarding exhaust pipe, refer to p. 13 and 15.
•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 240 Outdoor (T-H3J-OS), 340 Outdoor (T-H3S-OS), and 540 Outdoor (T-H3-OS) models 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 following minimum clearances:
There is a 2 in. clearance from the left and right sides of the unit to combustible and
non-combustible surfaces.
7 Page
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 next to any source of airborne debris, such as a clothes dryer, 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 unit 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 unit for 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.
•The warranty will not cover damage caused by water quality.
•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 unit 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 unit on a wall adjacent to a bedroom, or a room that is intended for quiet study or meditation, etc.
•Locate your heater close to a drain where water leakage will not do damage to surrounding areas. As with any water heating appliance, the potential for leakage at some time in the life of the product does exist. The manufacturer will not be responsible for any water damage that may occur. If you install a drain pan under the unit, ensure that it will not restrict the combustion air flow.
8 Page
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Installation Manual |
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Installation |
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CLEARANCES |
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Top |
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Maintain all |
clearances |
around |
Side |
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Back |
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the water heater. |
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Front |
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Side |
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Bottom |
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Model |
Top |
Bottom |
Front |
Back |
Sides |
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240 Indoor (T-H3J-DV) |
12 in. |
12 in. |
4 in.* |
0.5 in. |
2 in. |
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340 Indoor (T-H3S-DV) |
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(305 mm) |
(305 mm) |
(102 mm) |
(13 mm) |
(51 mm) |
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540 Indoor (T-H3-DV) |
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240 Outdoor (T-H3J-OS) |
36 in. |
12 in. |
24 in. |
0.5 in. |
2 in. |
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340 Outdoor (T-H3S-OS) |
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(914 mm) |
(305 mm) |
(610 mm) |
(13 mm) |
(51 mm) |
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540 Outdoor (T-H3-OS) |
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*24 inches recommended for maintenance.
INCLUDED ACCESSORIES
Check that these items below are included with the water heater.
Installation manual |
Temperature remote controller kit* |
Bird screen |
Communication cable |
and owner’s guide |
Outdoor models only |
Indoor models only |
540 (T-H3) model only |
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Qty: 1 |
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Qty: 1 |
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Qty: 2 |
Qty: 1 |
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*Refer to p.31. |
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OPTIONAL ITEMS |
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# |
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240 |
240 |
340 |
340 |
540 |
540 |
Model |
Indoor |
Outdoor |
Indoor |
Outdoor |
Indoor |
Outdoor |
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|
(T-H3J-DV) |
(T-H3J-OS) |
(T-H3S-DV) |
(T-H3S-OS) |
(T-H3-DV) |
(T-H3-OS) |
1. |
Temperature remote |
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controller |
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2. |
Pipe cover |
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3. |
Neutralizer kit |
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4. |
Sidewall vent |
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terminator (Hood) |
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and Wall thimble |
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5. |
3" PVC concentric |
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termination |
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6. |
Non-return valve |
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9Page
Installation Manual
Installation
1.Temperature remote controller: 9008172005 (TM-RE40)
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 185 °F, and it also works as a diagnostic tool that will give a concise error code whenever there is a problem with the unit.
The temperature options are 100 °F, 105 °F, 110 °F, 115 °F, 120 °F, 125 °F, 130 °F, 135 °F, 140 °F, 145 °F, 150 °F, 155 °F, 160 °F 165 °F, 175 °F and 185 °F.
See the Troubleshooting Section for information on possible error codes.
2. Pipe cover: 9008331005 (TH-PC03)
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.
3. 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. 29.)
4. Sidewall vent terminator (Hood) and Wall thimble:
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Covering wall thicknesses |
Part# |
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Terminator Hood |
9007999005 |
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Wall Thimble 4 - 7 in. |
9008345005 |
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Wall Thimble 5 - 10 in. |
9008346005 |
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Terminator Hood |
Wall Thimble |
Termination + Thimble 4 - 7 in. |
9008004005 |
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Termination + Thimble 5 - 10 in. |
9008005005 |
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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.
5. 3" PVC concentric termination: 9007611005 (TH-CVPVC33)
Used when terminating direct-vent (sealed combustion) systems,withIndoormodelsthatrequirea3in.(76mm)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.
6. Non-return valve: 9008847005
It is a must-have item for common venting system. It prevents
the escape of combustion gas through non-operating appliances.
(Refer to p. 20 and 21.)
10 Page
Installation Manual
Installation
WARNING FOR INSTALLATIONS
FOR YOUR SAFETY, READ BEFORE INSTALLATION:
Do not install the heater where water, debris or flammable vapors may get into the flue terminal. This may cause damage to the heater and void the warranty.
Do not have the vent terminal pointing toward any opening into a building. Do not locate your heater in a pit or location where gas and water can accumulate.
Prohibited
Do not install this water heater under an overhang less than 3 ft. (914 mm) from its top or eaves. The area under an overhang must be open to three sides (Outdoor models only).
Prohibited
Do not install the water heater vent terminator within1ft.(305mm)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. 22).
3 ft.
(914 mm)
Do not install next to a dryer or any source of airborne debris that can be trapped inside the combustion chamber, unless the system is direct-vented.
1ft.(305mm)USA
3ft.(914mm)Canada
1ft.(305mm)USA |
1ft.(305mm)USA |
3ft.(914mm)Canada |
3ft.(914mm)Canada |
11 Page
Installation Manual
Installation
HIGH-ALTITUDE INSTALLATIONS
Check the elevation where your water heater is installed. Set DIPswitches shown in the table below depending on the altitude.
Indoor models
Altitude |
0 to 2,000 ft. |
2,000 to |
3,000 to |
5,000 to |
7,500 to |
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DIPswitches |
(DEFAULT) |
3,000 ft. |
5,000 ft. |
7,500 ft. |
10,100 ft. |
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ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 9 10 |
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240 (T-H3J) and |
OFF |
OFF |
OFF |
OFF |
OFF |
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340 (T-H3S) models |
No. 3 : OFF |
No. 3 : OFF |
No. 3 : OFF |
No. 3 : OFF |
No. 3 : ON |
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No. 4 : OFF |
No. 4 : ON |
No. 4 : OFF |
No. 4 : ON |
No. 4 : ON |
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No. 5 : OFF |
No. 5 : OFF |
No. 5 : ON |
No. 5 : ON |
No. 5 : ON |
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ON 1 2 3 4 5 6 |
ON 1 2 3 4 5 6 |
ON 1 2 3 4 5 6 |
ON 1 2 3 4 5 6 |
ON 1 2 3 4 5 6 |
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540 (T-H3) model |
OFF |
OFF |
OFF |
OFF |
OFF |
|
(Lower bank of |
No. 2 : OFF |
No. 2 : OFF |
No. 2 : OFF |
No. 2 : OFF |
No. 2 : ON |
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DIPswitches) |
||||||
No. 3 : OFF |
No. 3 : ON |
No. 3 : OFF |
No. 3 : ON |
No. 3 : ON |
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No. 4 : OFF |
No. 4 : OFF |
No. 4 : ON |
No. 4 : ON |
No. 4 : ON |
|
Outdoor models |
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0 to 2,000 ft. |
2,000 to |
4,000 to |
Over 6,000 ft |
|
(DEFAULT) |
4,000 ft. |
6,000 ft. |
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ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 9 10 |
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240 (T-H3J) and |
OFF |
OFF |
OFF |
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340 (T-H3S) models |
No. 3 : OFF |
No. 3 : OFF |
No. 3 : ON |
Consult our |
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No. 4 : OFF |
No. 4 : OFF |
No. 4 : OFF |
Technical |
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No. 5 : OFF |
No. 5 : ON |
No. 5 : ON |
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Services |
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ON 1 2 3 4 5 6 |
ON 1 2 3 4 5 6 |
ON 1 2 3 4 5 6 |
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at 1-877- |
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540 (T-H3) model |
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OFF |
OFF |
OFF |
737-2840 |
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(Lower bank of |
No. 2 : OFF |
No. 2 : OFF |
No. 2 : ON |
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DIPswitches) |
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No. 3 : OFF |
No. 3 : OFF |
No. 3 : OFF |
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No. 4 : OFF |
No. 4 : ON |
No. 4 : ON |
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NOTE: The dark squares indicate the direction the DIPswitches should be set to.
240 (T-H3J) and 340 (T-H3S) models |
540 (T-H3) model |
Computer board |
Computer board |
Bank of DIPswitches |
Lower bank of DIPswitches |
DO NOT adjust any DIPswitches on the upper bank for the 540 (T-H3) WARNING model.
12 Page
Installation Manual
Installation
VENTING INSTRUCTIONS
For the 240 Indoor (T-H3J-DV), 340 Indoor (T-H3S-DV) and 540 Indoor (T-H3-DV) models
-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 DANGER from carbon monoxide and flue gases poisoning. Improper installation will
void product warranty.
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When installing the vent system, all applicable national and local codes must be |
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followed. If you install thimbles, fire stops or other protective devices and they |
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CAUTION |
penetrate any combustible or noncombustible construction, be sure to follow all |
|
applicable national and local codes. |
The Indoor models 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/CSAB149.1NaturalGasandPropaneInstallationCodeinCanada,aswellasapplicablelocalbuilding codes.
The use of venting materials approved for Category III/IV appliances is recommended whenever possible. However, the Indoor models 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. 15. 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 the vent collar of the unit.
•The vent must be easily removable from the top of the water heater for normal service and inspection of the unit.
•The water heater vent must not be connected to any other gas appliance or vent stack except an approved common-venting system. (Refer to p. 20 and 21.)
•Avoid using an oversized vent pipe or using extremely long runs of the pipe unless it is part of an approved common vent system.
•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 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 in. (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. 22 to 24.
13 Page
Installation Manual
Installation
-DIPswitch settings for Vent length-
<Two-pipe, direct-vent installation>
Refer to p. 16 for details.
Set DIPswitches shown in the tables below depending on the vent length.
3" venting
Vent length |
240 Indoor (T-H3J-DV) |
540 Indoor (T-H3-DV) |
|
340 Indoor (T-H3S-DV) |
(Upper bank of DIPswitches) |
||
|
5 to 20 ft. |
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 |
OFF |
OFF |
|
(DEFAULT) |
No. 6 : ON |
No. 3 : ON |
|
No. 7 : OFF |
No. 4 : OFF |
|
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 |
|
21 to 40 ft. |
OFF |
OFF |
|
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No. 6 : OFF |
No. 3 : OFF |
|
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No. 7 : OFF |
No. 4 : OFF |
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|
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 |
|
41 to 70 ft. |
OFF |
OFF |
|
No. 6 : ON |
No. 3 : ON |
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No. 7 : ON |
No. 4 : ON |
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4" venting |
|
|
Vent length |
240 Indoor (T-H3J-DV) |
540 Indoor (T-H3-DV) |
|
340 Indoor (T-H3S-DV) |
(Upper bank of DIPswitches) |
||
|
5 to 50 ft. |
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 |
OFF |
OFF |
|
(DEFAULT) |
No. 6 : ON |
No. 3 : ON |
|
No. 7 : OFF |
No. 4 : OFF |
|
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 |
51 to 100 ft. |
OFF |
OFF |
No. 6 : OFF |
No. 3 : OFF |
No. 7 : OFF |
No. 4 : OFF |
<Single pipe with room-air intake installation>
Refer to p. 17 for details.
Set DIPswitches shown in the table below depending on the vent length.
3" venting
Vent length |
240 Indoor (T-H3J-DV) |
540 Indoor (T-H3-DV) |
|
340 Indoor (T-H3S-DV) |
(Upper bank of DIPswitches) |
||
|
5 to 45 ft. |
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 |
OFF |
OFF |
|
(DEFAULT) |
No. 6 : ON |
No. 3 : ON |
|
No. 7 : OFF |
No. 4 : OFF |
|
ON 1 2 3 4 5 6 7 8 9 10 |
ON 1 2 3 4 5 6 7 8 |
46 to 70 ft. |
OFF |
OFF |
No. 6 : OFF |
No. 3 : OFF |
No. 7 : OFF |
No. 4 : OFF |
14 Page
Installation Manual
Installation
-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)-
The Indoor models can be vented with ABS, PVC, CPVC, or polypropylene (temperature rated up to
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 |
Canada |
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Schedule 40 PVC |
ANSI/ASTM D1785 |
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Exhaust pipe and |
PVC-DWV |
ANSI/ASTM D2665 |
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Schedule 40 CPVC |
ANSI/ASTM F441 |
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Fittings |
|
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Schedule 40 ABS-DWV |
ANSI/ASTM D2661 |
ULC S636 Certified |
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Polypropylene |
UL-1738 |
Materials Only |
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PVC |
ANSI/ASTM D2564 |
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Pipe Cement/Primer |
CPVC |
ANSI/ASTM F493 |
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ABS |
ANSI/ASTM D2235 |
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NOTE: Do NOT Use Cellular Foam Core Pipe |
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||
•Themaximumlengthofexhaustventpipingmustnotexceed70ft.(21.3m)for3”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.
Diameter |
Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length |
|||
3 in. (76 mm) |
5 |
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70 ft. (21.3 m) |
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4 in. (102 mm) |
5 |
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100 ft. (30.5 m) |
|
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length. |
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|||
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Max. Vertical or Horizontal (Total) Vent Length |
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No. of Elbows |
|
3" venting |
|
4" venting |
|
Up to 3,000 ft |
Up to 6,000 ft |
Up to 10,100 ft |
Up to 10,100 ft |
0 |
70 ft. (21.3 m) |
40 ft. (12.2 m) |
25 ft. (7.6 m) |
100 ft. (30.5 m) |
1 |
65 ft. (19.8 m) |
35 ft. (10.7 m) |
20 ft. (6.1 m) |
95 ft. (29.0 m) |
2 |
60 ft. (18.3 m) |
30 ft. (9.1 m) |
15 ft. (4.6 m) |
90 ft. (27.4 m) |
3 |
55 ft. (16.8 m) |
25 ft. (7.6 m) |
10 ft. (3.0 m) |
85 ft. (25.9 m) |
4 |
50 ft. (15.2 m) |
20 ft. (6.1 m) |
N/A |
80 ft. (24.4 m) |
5 |
45 ft. (13.7 m) |
N/A |
N/A |
75 ft. (22.9 m) |
Excludes vent terminators, termination elbows, or rain caps.
For details on the vent connection, refer to p. 16 and p. 17.
15 Page
Installation Manual
Installation
-Two-pipe, direct-vent illustrations-
Typical installations using PVC, ABS, or polypropylene vent
Horizontal Installation |
Vertical Installation |
|
Wall |
Hanger |
Roof |
|
|
|
Roof |
Hanger |
flashing |
Fire stop |
Connect between exhaust vent collar and piping.
See the instructions below.
For details of the optional items, refer to the Installation manual for each optional item.
<How to install intake and exhaust venting (two-pipe, direct-vent) with the indoor models>
3" vent connection
1. Connect 3" couplings directly on the exhaust and intake vent collar
of the water heater.
2. Connect 3” straight pipes to the couplings.
3” straight pipe
3” coupling
Intake vent collar (Female)
3” straight pipe
3” coupling
Exhaust vent collar (Female)
From 3" to 4" vent connection
1. Connect 3"x4" increasers directly on the exhaust and intake vent collar of the water heater.
2. Connect 4” straight pipes to the increasers.
4” straight pipe
3"x4" increaser
Intake vent collar (Female)
4” straight pipe
3"x4" increaser
Exhaust vent collar (Female)
16 Page
Installation Manual
Installation
-Single pipe with room-air intake illustrations-
Typical installations using PVC, ABS, or polypropylene vent
Horizontal Installation |
Vertical Installation |
Wall
Hanger
Elbow 
Connect between exhaust vent collar and piping.
See the instructions below.
Roof 
Roof flashing
Elbow |
Fire stop |
|
For details of the optional items, refer to the Installation manual for each Optional item.
<How to install single vent with the indoor models>
3" vent connection
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.
3. Connect a 3” straight pipe to the coupling.
From 3" to 4" vent connection
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.
3. Connect a 4” straight pipe to the increaser.
|
3” straight pipe |
3” elbow with |
3” coupling |
bird screen |
Exhaust vent collar |
|
|
Intake vent collar |
(Female) |
(Female) |
|
|
4” straight pipe |
3” elbow with |
3"x4" increaser |
bird screen |
|
|
Exhaust vent collar |
Intake vent collar |
(Female) |
(Female) |
|
17 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 models are a Category IV appliance and must be vented accordingly with any 4” vent approved for use with Category III/IV or Special BH type gas vent.
•The manufacturer recommends the NovaVent 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.
•Themaximumlengthofexhaustventpipingmustnotexceed100ft.(30.5m)(deducting5ft.(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 |
Max. Vertical or Horizontal Vent Length |
|
0 |
|
100 ft. (30.5 m) |
1 |
|
95 ft. (29.0 m) |
2 |
|
90 ft. (27.4 m) |
3 |
|
85 ft. (25.9 m) |
4 |
|
80 ft. (24.4 m) |
5 |
|
75 ft. (22.9 m) |
Excludes vent terminators, termination elbows, or rain caps.
18 Page
Installation Manual
Installation
-Direct-vent and single vent Illustrations-
Typical installations using stainless steel vents
Horizontal Installation |
Vertical Installation |
Wall |
Rain cap |
Hanger |
Roof |
Hanger |
Roof flashing |
|
Fire stop |
Sidewall vent termination
•The diagram above shows direct-vent installations. For single vent installation, connect a 4" elbow directly on the intake vent collar instead of a straight pipe. See the instructions below for the detail.
•For details of the optional items, refer to the Installation manual for each Optional item.
•Regarding the clearances from the exhaust terminal to the air inlet or opening, refer to p. 22 to 24.
•Follow all vent system manufacturer’s instructions and all local codes.
•Use 4” Category III/IV approved or Special BH, single or double wall stainless steel vent pipe.
<How to install stainless steel vent with the indoor models>
4" vent connection for direct-vent installation
1. Connect 4" stainless steel vent straight pipes directly on the exhaust/intake vent collar of the water heater.
4” stainless steel vent straight pipe
Intake vent collar (Female)
4” stainless steel vent straight pipe
Exhaust vent collar 
of the Indoor models 
(Female)
4" vent connection for single vent installation
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.
4” elbow with 
bird screen 
Intake vent collar (Female)
4” stainless steel vent straight pipe
Exhaust vent collar
of the Indoor models 
(Female)
19 Page
Installation Manual
Installation
-Common-venting system-
The Indoor models can be vented together using the same exhaust and intake venting.
•Up to 8 water heaters can be common-vented together.
•Anon-returnvalve(PartNo.9008847005)mustbeusedforeachwaterheaterthatispartofthesystem.
•The water heaters must all be direct-vented.
•For common-venting pieces and components, the manufacturer recommends Centrotherm's vent line.
Allowable models for common-venting
240 Indoor (T-H3J-DV)
340 Indoor (T-H3S-DV)
540 Indoor (T-H3-DV)
Only the models listed in the table above can be common-vented together.
Different models cannot be common-vented.
CAUTION
Typical common-vent installation examples
Roof |
Intake |
Exhaust |
|
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|
|
Condensate drain port |
wall |
Non-Return Valve |
Roof |
Roof
Condensate drain port |
Exhaust |
|
|
Intake |
Non-Return Valve |
wall |
Exhaust
Condensate drain port
|
Intake |
Non-Return Valve |
wall |
|
For details on the installation of a common-vent system, please refer to the vent manufacturer's instructions.
20 Page
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