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On-Demand Water Heater
Installation Manual and Owner's Guide
R
D
ANSI Z21.10.3 ・ CSA 4.3
Gas Tankless Water Heater
Suitable for combination 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
Complies with SCAQMD Rule
1146.2 for natural gas Low NOx
Emissions of 14 ng/J or 20 ppm.
EASY-LINK SYSTEM
MULTI-UNIT SYSTEM
(540 model only)
Keep this manual near the water heater for future reference whenever maintenance, adjustment, or
service is required.
R
540
model only
- Do not store or use gasoline or other
- WHAT TO DO IF YOU SMELL GAS
- Installation and service must be performed
TM
If the information in these
instructions is not followed
exactly, a fire or explosion may
result causing property damage,
WARNING
personal injury or death.
flammable vapors and liquids in the vicinity
of this or any other appliance.
use any phone in your building.
a neighbor's phone. Follow the gas
supplier's instructions.
the fire department.
by a qualified installer, service agency or the
gas supplier.
If you have any questions, please
call or write to:
In the United States
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Toll Free: 1-877-737-2840
In Canada
599 Hill Street West
Fergus, ON N1M 2X1
1-888-479-8324
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Summary of Contents for John Wood 240 Indoor
- Page 1 On-Demand Water Heater Installation Manual and Owner’s Guide ANSI Z21.10.3 ・ CSA 4.3 model only If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, WARNING 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.
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Page 2: Table Of Contents
Contents CONTENTS Installation Manual Owner's Guide SPECIFICATIONS ..........4 OPERATING SAFETY ........44 INTRODUCTION ..........5 NORMAL OPERATION ........46 SAFETY GUIDELINES........6 SAFETY DEFINITION ........6 AND REMOTE CONTROLLER ....46 GENERAL ............6 GENERAL ............46 INSTALLATION ..........7 OUTLET WATER TEMPERATURE GENERAL ............7 SETTING .............47 CLEARANCES ..........9 TEMPERATURE TABLE OF CONTROLLER .47 INCLUDED ACCESSORIES ......9 ADDITIONAL FEATURES ......48... -
Page 3: Installation Manual
Installation Manual CONGRATULATIONS Congratulations and thank you for choosing our tankless water heater. Before use, we recommend that you read through this installation If you need an additional manual, contact the manufacturer or your local distributor. When you call, please tell us the product name and the serial number of your unit written on the rating plate of the water heater. -
Page 4: Specifications
SPECIFICATIONS Model Indoor Outdoor Indoor Outdoor Indoor Outdoor Natural Gas Input Min.: 15,000 Min.: 15,000 Min.: 15,000 BTU/h (Operating Range) Max.: 160,000 Max.: 180,000 Max.: 199,000 Propane Input Min.: 13,000 Min.: 13,000 Min.: 13,000 BTU/h (Operating Range) Max.: 160,000 Max.: 180,000 Max.: 199,000 Gas Connection 3/4"... -
Page 5: Introduction
These high efficiency models have a built-in secondary heat exchanger that absorbs latent heat from the exhaust gas. The 240 Indoor, 340 Indoor, and 540 Indoor models are only to be installed indoors. The 240 Outdoor, 340 Outdoor, and 540 Outdoor models are only to be installed outdoors. -
Page 6: Safety Guidelines
SAFETY GUIDELINES 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 in minor or moderate injury. -
Page 7: Installation
9. The 240 Indoor, 340 Indoor, and 540 Indoor 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. - Page 8 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. WARNING The manufacturer does not recommend installing the water heater in a pit or location where gas and water can accumulate.
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Page 9: Clearances
Side hazard, potentially leading to death, serious Front injury, and/or property damage. WARNING Model Bottom Front Back Sides 240 Indoor 12 in. 12 in. 4 in.* 0.5 in. 3 in. 340 Indoor (305 mm) (305 mm) (102 mm) (13 mm) - Page 10 2. Pipe cover: 1. Temperature remote controller: 100112718 (TH-PC03) 100209924 (TM-RE42) The pipe cover protects The temperature remote controllers have the plumbing pipes to three functions. It allows the output the water heater from temperature from the water heater to be unexpected adjustments.
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Page 11: Warning For Installations
FOR YOUR SAFETY, READ BEFORE INSTALLATION: Do not install the heater where water, debris or Do not have the vent terminal pointing toward flammable vapors may get into the flue terminal. any opening into a building. Do not locate your This may cause damage to the heater and void the heater in a pit or location where gas and water warranty. - Page 12 Adjust the appropriate DIP switches according to model and elevation as shown below. DO NOT adjust the other DIP switches. Turn off the power supply to the water heater before changing the DIP switch settings. WARNING Failure to observe these warnings could lead to carbon monoxide poisoning or death.
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Page 13: Venting Instructions
Indoor 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 from carbon monoxide and flue gases poisoning. Improper installation will void WARNING product warranty. -
Page 14: Combustion Air Supply
This gas water heater requires an adequate source of clean air for combustion and ventilation. Without sufficient air, your water heater may not operate properly and may emit excessive and abnormal amounts of carbon monoxide which may result in carbon monoxide poisoning or death. WARNING The guidelines in this section apply to installations within the United States. - Page 15 Your water heater’s BTU/h rating is on the rating plate. The BTU/h ratings should be on the other appliances’ rating plates. If you have trouble determining the BTU/h ratings, contact the manufacturer or have a qualified person determine the ventilation requirements. NOTICE Example: Your...
- Page 16 Determine type of ventilation 1. Direct to outdoors 3. Horizontal ducts 4. Single opening (not recommended; must be at least 100 in (6.5 cm (1.42 m 5. From a larger room inside the house (not recommended – refer to "Calculate the air volume of the room" above to determine if the combined volume of the rooms may be adequate).
- Page 17 Gable vent to outdoors Install above 12” (305 mm) Outlet air to maximum per 4,000 btu/h Two permanent Openings Alternate 1 in (6.5 cm Space Air Inlet per 4,000 btu/h 12” (305 mm) maximum per 4,000 btu/h Figure 1 - Direct to outdoors openings Figure 2 - Direct to outdoors openings Two permanent openings 1 in...
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Page 18: Exhaust Vent (Abs,Pvc,Cpvc, Or Polypropylene Vent)
-Exhaust vent ( 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... -
Page 19: Dip Switch Settings For Vent Length (Abs,Pvc,Cpvc, Or Polypropylene Vent)
-DIP switch settings for vent length- PVC, CPVC, ABS, or polypropylene vent Adjust the appropriate DIP switches according to model and vent length as shown below. DO NOT adjust the other DIP switches. Turn off the power supply to the water heater before changing the DIP switch settings. - Page 20 4" (102 mm) 4" (102 mm) 3"(76 mm) 3" (76 mm) straight pipe straight pipe straight pipe straight pipe 3" (76 mm) coupling 3"x 4" 3" (76 mm) coupling (included) (76 x 102 mm) 3"x 4" (included) increaser (76 x 102 mm) increaser Exhaust vent collar Exhaust vent collar...
- Page 21 4" (102 mm) straight pipe 3"(76 mm) straight pipe 3"x 4" 3" (76 mm) coupling (76 x 102 mm) 3" (76 mm) elbow (included) increaser with bird screen 3" (76 mm) elbow Exhaust vent with bird screen Intake vent collar collar Exhaust vent (Female)
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Page 22: Exhaust Vent (Stainless Steel Vent)
-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 (71 °C). - Page 23 4” (102 mm) 4" (102 mm)elbow 4" (102 mm) stainless steel vent 4" (102 mm) with bird screen stainless steel vent straight pipe stainless straight pipe steel vent Exhaust vent collar straight pipe Intake vent of the Indoor models Exhaust vent collar collar (Female) (Female) of the Indoor...
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Page 24: Common Venting System
For common-venting pieces and components, the manufacturer recommends Centrotherm's vent line. Allowable models for common-venting 240 Indoor, 340 Indoor, 540 Indoor, 540P Indoor Only the models listed in the table above can be common-vented together. Different models cannot be common-vented. - Page 25 5 in. priate DIP switches (125 mm) (6.1 m) (30.5 m) as shown in the 240 Indoor/340 Indoor (22.9 m) ON 1 2 3 4 5 6 7 8 9 10 le table. DO NOT 6 in. adjust the other DIP (15.2 m...
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Page 26: Vent Termination Clearances
Inside corner = Vent terminal detail = Air supply inlet = Area where the terminal Fixed Operable Fixed closed closed Operable Regulator/Gas meter vent outlet Canada Installations US Installations Direct vent and other than Other than Direct vent direct vent direct vent A Clearance above grade, veranda, porch, deck, or balcony 1 ft (30 cm) -
Page 27: Clearances For Sidewall Terminations
Improper installation can result in carbon monoxide poisoning or death. Follow all local and national codes in regards to proper termination clearances. In the absence of such codes, the clearances below can be used as guidelines. Local codes supersede these WARNING guidelines. -
Page 28: Clearances For Rooftop Terminations
Follow all local and national codes in regards to proper termination clearances. In the absence of such codes, the clearances below must be met. Local codes supersede these clearances. Failure to observe this warning may result in severe personal injury or death. WARNING Canadian requirements differ from the guidelines in this section. -
Page 29: Gas Supply And Gas Pipe Sizing
-General- Do not use this water heater with any gas other than the one listed on the rating plate. 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 WARNING cause serious accidents. -
Page 30: Natural Gas Supply Piping
Maximum delivery Capacity in Cubic Feet of Gas per Hour (based on IPS Pipe carrying Natural Gas with 0.60 Specific Gravity with a Pressure Drop of 0.5" W.C.). Based on Energy Content of 1,000 BTU/Cubic ft: The water heater requires 160 Cubic ft/hr for the 240 model, 180 Cubic ft/hr for the 340 model, and 199 Cubic ft/hr for the 540 model. -
Page 31: Water Connections
Do not use this appliance if any part has been under water. Immediately contact a qualified installer or service agency to replace a flooded water heater. Do not attempt to repair the unit! It must be replaced! WARNING Do not reverse the hot outlet and cold inlet connections to the water heater. This will NOTICE prevent the water heater from activating properly. -
Page 32: 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 (100112159/TH-NT01) is sold separately. - Page 33 Installation Installation without neutralizer with neutralizer 1/2" MPT 1/2" MPT Condensate connection Condensate 1/2" connection Condensate 1/2" Condensate drain tube* drain tube* 1/2" MPT x 3/8" FPT (Included with Neutralizer accessory) 1/2" Overflow bypass* Condensate (1/2" Condensate Neutralizer cartridge (Included drain tube* drain tube) with Neutralizer accessory)
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Page 34: Electrical Connections
Follow the electrical code requirements of the local authority having jurisdiction. In the absence of such requirements, follow the current edition of the National Electrical Code ANSI/NFPA 70 in the U.S. or the current edition of CSA C22.1 Canadian Electrical Code Part 1 in Canada. WARNING When servicing or replacing parts within the water heater, label all wires prior to disconnection to facilitate an easy and error-free reconnection. -
Page 35: Temperature Remote Controller
-Included accessories- The remote control is an optional accessory that can be installed in a hall, closet, etc., to allow for temperature adjustment without having to go to the heater. When installed, the remote will take priority over the built-in controller of indoor models. Verify that the items listed below are included with the remote controller. - Page 36 4. Tighten the two Fork terminals beneath the two Remote controller terminal screws on the back of the main body. (Fig. D-1) 5. Cut out the inlet for the remote controller cable from the bottom of the main body. (Fig. D-2) 6.
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Page 37: Easy Link Connection Procedures
The 540 model water heaters can combine with the following approved heaters with communication cables to work as a multiple-unit manifold system. The built-in Easy-Link System allows up to 4 units to manifold together. A communication cable (gray color) comes with each 540 model. You can manifold from 2 to 4 units without the need for a multi-unit controller. - Page 38 5. Between the “PARENT” and the “CHILD-1” units: Connect the “PARENT” connector of the “PARENT” unit to the “1” connector of the “CHILD-1” unit using the supplied linking cable. 6. Between the “CHILD-1” and the “CHILD-2” units: Connect the “2” connector of the “CHILD-1” unit to the “1” connector of the “CHILD-2” unit. 7.
- Page 39 Multiple 540 models can be combined for a Multi-Unit System, along with the multi-unit controller (Part 100112691 (TM-MC02)). The multi-unit controller can control from 2 units to 20 units for commercial or residential applications. For a 20-unit system, the computer can modulate between the usages of 13,000 BTU/h (Propane) or 15,000 BTU/h (Natural gas) to 3.98 Million BTU/h.
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Page 40: Applications
APPLICATIONS This water heater is suitable for combination water (potable) heating and space heating and not suitable for space heating applications only. 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 WARNING flow rates are labeled next to each application diagram. -
Page 41: Dual-Purpose Hot Water Heating
Diagrammatic layout of radiant heating and domestic water heater. All water piping should be insulated in accordance with 780 CMR 3-inch gas exhaust vent (Discharge must Cold water supply comply with local and must be installed below state codes.) Cannot the top of the water heater Check valve will have be common vented... -
Page 42: Initial Operation
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 unit using only your hand to avoid any spark. Never use tools. -
Page 43: 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 owner's guide If you need an additional manual, contact the manufacturer or your local distributor. When you call, please tell us the product name and the serial number of your unit written on the rating plate of the water heater. -
Page 44: Operating Safety
OPERATING SAFETY WARNING: Page... - Page 45 ° ° CHAUDE CHAUDE CHAUDE BURN BRÛLURE ° ° ・ Page...
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Page 46: Normal Operation
NORMAL OPERATION Built-in controller Remote controller Display for Temperature When the STAND BY LED is ON, the "INFO" Button hot water temperature will be Each time the button is pressed, displayed. the operation mode is selected in the sequence of the following. Inlet water Outlet water Water... -
Page 47: Outlet Water Temperature
Screen on the controller Operation Built-in controller Remote controller Turn on the 120 VAC power supply to the unit (the water heater or the multi-unit controller). Press the "ON/OFF" button on the controller in order to turn the controller on. When ON, the STAND BY LED is lit. -
Page 48: Temperature Table Of Controller .47 Additional Features
You can get some information about the water heater condition by pressing the "INFO" button. For more information, follow the procedures below: Screen on the controller INFO Operation Button Built-in controller Remote controller Inlet water temperature will be Inlet water temperature 1st. -
Page 49: Temperature Settings On The Pcb
Adjust the appropriate DIP switches according to model and temperature as shown below. DO NOT adjust the other DIP switches. Turn off the power supply to the water heater before changing the DIP switch settings. WARNING Failure to observe these warnings could lead to carbon monoxide poisoning, severe personal injury, or death. -
Page 50: Freeze Protection System
This water heater comes equipped with heating blocks to protect it from damage associated with freezing. When the freeze protection thermostat senses air temperature below 36.5 (2.5 ), the °F °C blocks will heat up to prevent freezing of the unit. To operate these freeze protection systems, there has to be electrical power to the unit. -
Page 51: Maintenance And Service
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 to the off position. 3. Failure to follow these steps could lead to fire or explosion, resulting in personal injury or death. -
Page 52: Troubleshooting
GENERAL PROBLEM SOLUTIONS It takes a long time to The time it takes to deliver hot water from the water heater to your fixtures get hot water at the depends on the length of piping between the two. The longer the distance fixtures. -
Page 53: General
PROBLEM SOLUTIONS Controller does not Make sure the unit is supplied with power. display anything when Make sure the connection to the unit is correct. (pp. 35 and 36) the power button is NOTICE: turned on. When the unit has not operated for five minutes or more, the display of the controllers turns off to conserve energy. -
Page 54: Error Codes
Example: If your unit has a “321” error code (which signifies an inlet thermistor failure) Indicator on the built-in controller or remote controller : “321” will be displayed on the screen. Error code Green LED on the computer board: The green LED on the computer board will indicate this code with two flashes every 1/2 second. -
Page 55: Fault Analysis Error Code
Outdoor model installation Indicator on the remote controller of Parent unit (If it is installed): “321” and "2" will alternately flash on the display. No. 2 Unit: The green Unit #1 Unit #2 Unit #3 Unit #4 LED on the computer PARENT CHILD CHILD... - Page 56 Green Malfunction Controller Diagnosis description Outlet thermistor fail- ure (540 model only) Flashes Check for connection/breakage of wires and/or debris on therm- Exhaust thermistor istor (Part #407, 408, 411, 715). failure (Indoor models Flashes only) Air-fuel ratio rod fail- Check for connection/breakage of wires (Part #709) and/or soot on the AFR rod (Part #108).
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Page 57: Components Diagram
COMPONENTS DIAGRAM Case assembly Outdoor models Indoor models Temperature controller Temperature Indoor models remote controller Page... - Page 58 Computer board assembly 240 and 340 models 540 model 707 722 Surge box assembly Page...
- Page 59 Burner assembly Burner assembly 109 111 Manifold assembly 540 model Page...
- Page 60 Water Way assembly 540 model 240 and 340 models Bypass section (540 model) Water outlet section Water inlet section Page...
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Page 61: Parts List
PARTS LIST Part # Item # Description 240, 340 and T-H3J, T-H3S and 540 models T-H3 models Case assembly for Indoor models for Outdoor models Front cover for 240 and 340 Indoor 100074663 for 240 and 340 Outdoor 100074664 for 540 Indoor 100074665 for 540 Outdoor 100074666... - Page 62 Part # Item # Description 240, 340 and T-H3J, T-H3S and 540 models T-H3 models Pressure port 100074227 Combustion chamber tube 100074528 EX019 Gas inlet 100074616 Gas inlet ring 100074526 EX00D Surge box plate O-ring P18 NBR (Black) 100074533 EZP18 O-ring P20 NBR (Black) 100074242 Silicon ring for Outdoor models...
- Page 63 Part # Item # Description 240, 340 and T-H3J, T-H3S and 540 models T-H3 models Fastener “16-25A” 100074389 Fastener “6-15” 100074297 Flat heater 100074686 Drain tube 100074687 Cold pipe for 240 and 340 models 100074688 for 540 model 100074689 Stainless heat exchanger out pipe 100074690 Header connection 100074691...
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Page 64: Output Temperature Chart
Chart is based on properly sized gas line 240 model Output Temperature vs. GPM (Max. 6.6 GPM) with Various Inlet Water temperature (L/M) 40°F (4°C) 50°F 10°C) 60°F 16°C) 70°F 21°C) Set temp.°F(°C) (38) (40) (43) (45) (50) (52) (55) (57) (60) 40°F (4°C)
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