Lochinvar 140H Series Installation Manual And Owner's Manual

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On-Demand Water Heater

Installation Manual and Owner's Guide

ANSI Z21.10.3 ・ CSA 4.3

Models

140H

240H

340H

540H

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 (540H only)

• MULTI-UNIT SYSTEM (540H only)

Keep this manual near the water heater for future reference whenever maintenance, adjustment, or

service is required.

540H 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.

- 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

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

or write to:

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Summary of Contents for Lochinvar 140H Series

Page 1 On-Demand Water Heater Installation Manual and Owner’s Guide ANSI Z21.10.3 ・ CSA 4.3 540H only Models If the information in these instructions is not followed 140H exactly, a fire or explosion may 240H result causing property damage, WARNING personal injury or death. 340H 540H - Do not store or use gasoline or other...
Page 2: Table Of Contents
Contents CONTENTS Installation Manual Owner's Guide SPECIFICATIONS ..........4 OPERATING SAFETY ........47 INTRODUCTION ..........5 NORMAL OPERATION ........49 SAFETY GUIDELINES........6 BUILT-IN CONTROLLER SAFETY DEFINITION ........6 AND REMOTE CONTROLLER ....49 GENERAL ............6 GENERAL ............49 INSTALLATION ..........7 OUTLET WATER TEMPERATURE GENERAL ............7 SETTING .............50 CLEARANCES ..........9 TEMPERATURE TABLE OF CONTROLLER .50 INCLUDED ACCESSORIES ......9...
Page 3: Installation Manual
Installation Manual 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 manual carefully. Keep this manual for future reference. If you need an additional manual, contact the manufacturer or your local distributor.
Page 4: Specifications
Installation Manual Specifications SPECIFICATIONS 140H 140H 240H 240H 340H 340H 540H 540H Indoor Outdoor Indoor Outdoor Indoor Outdoor Indoor Outdoor Model (AT-H3M (AT-H3M (AT-H3J (AT-H3J (AT-H3S (AT-H3S (AT-H3 (AT-H3 -DV) -OS) -DV) -OS) -DV) -OS) -DV) -OS) Natural Gas Input Min.: 15,000 Min.: 15,000 Min.: 15,000...
Page 5: Introduction
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/front panel of the water heater. •...
Page 6: Safety Guidelines
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 in minor or moderate injury.
Page 7: Installation
Installation Manual Installation INSTALLATION GENERAL 1. Follow all local codes, or in the absence of local codes, follow the current edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or B149.1 Natural Gas, Propane Installation Code in Canada. 2.
Page 8 Installation Manual Installation • 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.
Page 9: Clearances
Installation Manual Installation CLEARANCES Maintain all clearances around the water heater. Failure to do so could create a fire hazard, potentially leading to death, serious injury, and/or property damage. WARNING Model Bottom Front Back Sides 12 in 12 in 4 in* 0.5 in** 3 in Back...
Page 10 Installation Manual Installation 1. Temperature remote controller: 2. Pipe cover: 100112718 (TH-PC03) for 240H/340H/540H 100209924 (TM-RE42) 100187904 (TH-PC04) for 140H The temperature remote controllers have The pipe cover protects the plumbing three functions. It allows the output pipes to the water heater from temperature from the water heater unexpected adjustments.
Page 11: Warning For Installations
Installation Manual Installation 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 This may cause damage to the heater and void your heater in a pit or location where gas and the warranty.
Page 12: High-Altitude Installations
Installation Manual Installation HIGH-ALTITUDE INSTALLATIONS • 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.
Page 13: Venting Instructions
Installation Manual Installation VENTING INSTRUCTIONS • 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.
Page 14: Vent Termination Clearances
Installation Manual Installation -Vent termination clearances- Inside Legend: corner detail = Vent terminal = Air supply inlet = Area where terminal is not permi�ed 15 � Fixed Operable closed Fixed closed Operable Regulator vent outlet In the event no regulator is present, H and I can be disregarded Canada Installations US Installations...
Page 15: Clearances For Sidewall Terminations
Installation Manual Installation -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 guidelines. WARNING Multiple Sidewall Terminations An exhaust termination must be at least...
Page 16: Clearances For Rooftop Terminations
Installation Manual Installation -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 17: Combustion Air Supply
Installation Manual Installation -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 WARNING carbon monoxide poisoning or death.
Page 18 Installation Manual Installation 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. : If you are replacing your old water heater with one that has a higher BTU/h rating, the amount of NOTICE ventilation required may be greater.
Page 19 Installation Manual Installation Determine type of ventilation There are several types of ventilation that can be used. The various options are listed below. See also the illustra- tions on the next page. 1. Direct to outdoors 2. Vertical ducts 3. Horizontal ducts-Single opening (not recommended; must be at least 100 in (645 cm ) .
Page 20 Installation Manual Installation Combustion air supply options Gable vent to outdoors Install above insulation 12” (305 mm) Outlet air to Conﬁned maximum attic 1 in (6.5 cm Space per 4,000 btu/h Two permanent Openings Conﬁned Alternate Inlet air from 1 in (6.5 cm Space Air Inlet...
Page 21: Exhaust Vent (Abs,Pvc,Cpvc, Or Polypropylene Vent)
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.
Page 22: Dip Switch Settings For Vent Length (Abs,Pvc,Cpvc, Or Polypropylene Vent)
Installation Manual Installation -DIP switch settings for vent length- PVC, CPVC, ABS, or polypropylene vent Typical installations using • Adjust the appropriate DIP switches according to model and vent length as shown below. DO NOT adjust the other DIP switches. •...
Page 23 Installation Manual Installation 3 inch & 4 inch vent installation Two-pipe, direct-vent installation Vertical Installation Horizontal Installation Wall Hanger Roof Roof flashing Hanger Fire stop Connect between exhaust vent collar and piping. See the instructions on the next page. For details on the vent components, refer to the vent manufacturer’s instructions. Single-pipe with room-air intake installation Vertical Installation Horizontal Installation...
Page 24 Installation Manual Installation Set DIP switches shown in the table below depending on the vent diameter, the installation, and the vent length. Vent diameter & Installation Vent length 5 to 20 ft (1.5 to 6.1 m) Two-pipe, Direct vent 21 to 40 ft (6.2 to 12.2 m) 41 to 70 ft (12.3 to 21.3 m) (DEFAULT) 3ʺ...
Page 25: Exhaust Vent (Stainless Steel Vent)
Installation Manual Installation <How to remove 3" PVC adapter from the intake/exhaust collar> 3" adapter* 3" adapter* Remove the 3" adapter when using vent material Intake vent collar (Female) Exhaust vent collar other than PVC or CPVC. Screws (Female) 1. Remove each screw from 3" adapter to detach the adapters from each vent collar.
Page 26: Dip Switch Settings For Vent Length (Stainless Steel Vent)
Installation Manual Installation -DIP switch settings for vent length- stainless steel vents Typical installations using • 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. WARNING •...
Page 27 Installation Manual Installation • Follow the clearances listed on pages 11, 14-16 when installing the vent and air intake terminations. • Follow the vent manufacturer’s installation instructions and clearance requirements. • Use 4" Category III/IV approved or Special BH, single or double wall stainless steel vent pipe, listed to UL 1738.
Page 28: Common Venting System
Installation Manual Installation -Common-venting system- The Indoor model can be vented together using the same exhaust and intake venting except 140H model. • Up to 8 water heaters can be common-vented together. • A non-return valve (100113130) must be used for each water heater that is part of the system. •...
Page 29 Installation Manual Installation To determine the dimension of a common-venting system Determine the vent diameter (D) and the total vent length based on the number of water heaters installed. The total vent length (L) consists of the horizontal width (W) and the vertical height (H). See the table below Elbow terminal Elbow terminal Exhaust...
Page 30: Gas Supply And Gas Pipe Sizing
Installation Manual Installation 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.
Page 31: Natural Gas Supply Piping
Installation Manual Installation -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 120 Cubic ft/hr for the 140H model, 160 Cubic ft/hr for the 240H model, 180 Cubic ft/hr for the 340H model, and 199 Cubic ft/hr for the 540H model.
Page 32: Water Connections
Installation Manual Installation 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.
Page 33: Condensate Drain
Installation Manual Installation CONDENSATE DRAIN This high efficiency water heater produces acidic condensate that must be properly drained per local codes. The water heater does not have a built-in neutralizer to raise the pH level. A neutralizer is available from the water heater manufacturer, if needed.
Page 34 Installation Manual Installation Installation Installation without neutralizer with neutralizer 1/2" MPT 1/2" MPT Condensate connection Condensate 1/2" 140H Condensate connection Condensate 1/2" Condensate drain tube* drain port*** drain tube* 1/2" MPT x 3/8" FPT (Included with Neutralizer accessory) 1/2" Overflow bypass* Condensate (1/2"...
Page 35: Electrical Connections
Installation Manual Installation ELECTRICAL CONNECTIONS • Ensure that circuit power is turned OFF before you complete the following steps. • 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.
Page 36: Temperature Remote Controller
Installation Manual Installation TEMPERATURE REMOTE CONTROLLER -Included accessories-Outdoor models only The remote control is an optional accessory that can be installed in a hall, closet, etc., to allow for tempera- • ture adjustment without having to go to the heater. When installed, the remote will take priority over the built-in controller of indoor models.
Page 37 Installation Manual Installation 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.
Page 38: Easy-Link System
Installation Manual Installation EASY-LINK SYSTEM (540H model only) The 540H 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. •...
Page 39 Installation Manual Installation 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”...
Page 40: Multi-Unit System
Installation Manual Installation MULTI-UNIT SYSTEM Multiple 540H 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.
Page 41: Applications
Installation Manual Applications APPLICATIONS -Recirculation- When installing a recirculation pump, care must be taken to properly size the pump for the application. Sizing must be performed by the installing contractor or engineer. Below are requirements that need to be followed when sizing: •...
Page 42: Domestic And Space Heating
Installation Manual Applications -Domestic and Space Heating- • This water heater is suitable for combination water (potable) heating & space heating and not suitable for space heating applications only. • This water heater 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.
Page 43 Installation Manual Applications Below is a suggested piping layout. The installer must properly install the system per manufacturers instructions and local codes. LEGEND THERMOSTATIC MIXING VALVE TEMPERED HOT WATER TO FIXTURE PRESSURE RELIEF VALVE CIRCULATION PUMP BALL VALVE CHECK VALVE COLD BUILDING RETURN...
Page 44: Dual-Purpose Hot Water Heating
Installation Manual Applications -Dual Purpose Water Heating for the State of Massachusetts- Diagrammatic layout of radiant heating and domestic water heater. 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 All water piping should be insulated in accordance with 780 CMR...
Page 45: Initial Operation
Installation Manual 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. If the knob will not turn by hand, do not try to force it;...
Page 46: Owner's Guide
Owner's Guide 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 carefully. Keep this manual for future reference. If you need an additional manual, contact the manufacturer or your local distributor.
Page 47: Operating Safety
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 appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner.
Page 48 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. Do not install water heater where flammable products will be stored or used unless the main burner is at least 18”...
Page 49: Normal Operation
Owner's Guide Normal Operation NORMAL OPERATION BUILT-IN CONTROLLER AND REMOTE CONTROLLER The illustration below shows an example of the controllers. The exact display may differ from examples. 140H built-in controller display is same orientation as remote controller image as shown below. Built-in controller Remote controller Display for Temperature...
Page 50: Outlet Water Temperature Setting
Owner's Guide Normal Operation OUTLET WATER TEMPERATURE SETTING -Set 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.
Page 51: Additional Features
Owner's Guide Normal Operation ADDITIONAL FEATURES -Information mode- 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 52: Temperature Settings On The Pcb
Owner's Guide Normal Operation TEMPERATURE SETTINGS ON THE PCB (WITHOUT REMOTE CONTROLLER) • 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 set- tings.
Page 53: Freeze Protection System
Owner's Guide Normal Operation 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 °F (2.5 °C), the blocks will heat up to prevent freezing of the unit.
Page 54: Maintenance And Service
Owner's Guide Maintenance and service MAINTENANCE AND SERVICE • Turn off the electrical power supply and close the manual gas shutoff valve and the manual water control valve before servicing. • Failure to do so could result in severe personal injury, or death. WARNING The following maintenance is required for the proper operation of water heaters.
Page 55: Unit Draining & Power Outage (Freeze Protection)
Owner's Guide Maintenance and service UNIT DRAINING & POWER OUTAGE (FREEZE PROTECTION) If you will not be using your heater for a long period of time, drain the water out of the unit completely and dis- connect power to your heater to keep the water heater from freezing and being damaged. 1.
Page 56: Measuring Inlet Gas Pressure
Owner's Guide Maintenance and service MEASURING INLET GAS PRESSURE 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.
Page 57: Troubleshooting
Owner's Guide Troubleshooting TROUBLESHOOTING 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 or fixtures.
Page 58: Error Codes
Owner's Guide Troubleshooting 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. 36 and 37) 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 59: Single Unit Installation
Owner's Guide Troubleshooting -Single unit Installation- 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 •...
Page 60: Fault Analysis Error Code
Owner's Guide Troubleshooting 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 LED Unit #1 Unit #2 Unit #3 Unit #4 on the computer board will PARENT CHILD...
Page 61 Owner's Guide Troubleshooting Controller Green Malfunction Diagnosis description 331* Outlet thermistor fail- ure (540H only) Flashes • Check for connection/breakage of wires and/or debris on thermistor (Part 341* Exhaust thermistor failure #407, 408, 411, 715, 718 721). (Indoor models only) Flashes 391* Air-fuel ratio rod fail-...
Page 62: Components Diagram
Owner's Guide Components Diagram COMPONENTS DIAGRAM Case assembly 140H Indoor 140H Outdoor Temperature Built-in controller remote controller 140H Indoor 140H 100209924 Page...
Page 63: Computer Board Assembly
Owner's Guide Components Diagram Computer board assembly Surge box assembly 140H 140H Indoor model Outdoor model Wiring diagram Indoor only Heater (for the secondary heat exchanger) Heaters (for the heat exchanger and water pipes) 140H (for the drain hose) (for the water pipes) (for the water inlet) Igniter rod (for the water outlet)
Page 64: Burner Assembly
Owner's Guide Components Diagram Burner assembly 140H Burner assembly 111 711 Manifold assembly 055 063 Page...
Page 65: Water Way Assembly
Owner's Guide Components Diagram Water Way assembly 140H Indoor 140H Outdoor 425 471 472 065 450 053 for Indoor model 451 414 052 454 Water outlet section Water inlet section Page...
Page 66 Owner's Guide Components Diagram Case assembly 240H/340H/540H Indoor 240H/340H/540H Outdoor Built-in controller 240H/340H/540H Indoor Surge box assembly 240H/340H/540H Temperature remote controller 240H/340H/540H Page...
Page 67 Owner's Guide Components Diagram Computer board assembly 240H/340H 540H 707 722 Wiring diagram Heater 240H/340H Outdoor Only Igniter rod Heater 240H/340H Heater Heater Thermostat 240H/340H Indoor Only O.H.C.F Heater Ground Surge Heater Hi-limit Y BL O switch Heater 240H/340H Outdoor Only Drain plug detector AFR rod...
Page 68 Owner's Guide Components Diagram Burner assembly 240H/340H/540H Burner assembly 109 111 Manifold assembly 540H Page...
Page 69 Owner's Guide Components Diagram Water Way assembly 240H/340H/540H 540H 240H/340H Bypass section 540H Water outlet section Water inlet section Page...
Page 70: Parts List
Owner's Guide Parts list PARTS LIST Model Item # Description 140H 240H 340H 540H Case assembly Indoor Case assembly Outdoor Front cover Indoor 100074663 100074665 Front cover Outdoor 100074664 100074666 Intake air port assembly 100076311 100074667 Bracket Junction box 100074668 100074668 Power supply cord assembly 100076313...
Page 71 Owner's Guide Parts list Model Item # Description 140H 240H 340H 540H Burner assembly 100076314 100074670 Manifold with gas valve assembly LP 100337320 100074671 Manifold with gas valve assembly NA 100337321 100074672 Fan motor for Indoor model 100074606 Fan motor for Outdoor model 100074228 Burner gasket 100074216...
Page 72 Owner's Guide Parts list Model Item # Description 140H 240H 340H 540H Hi-Limit switch 100074412 100074280 Overheat-cut-off fuse 100074252 100074334 Pipe heater 100076325 100074682 Inlet heater for Indoor model 100076326 100074683 Inlet heater for Outdoor model (240H/340H/540H) 100074684 Drain plug detector assembly 100342423 Inlet heater 100074629...
Page 73 Owner's Guide Parts list Model Item # Description 140H 240H 340H 540H Drain port (240H/340H/540H) 100074692 Thermistor fixing plate 100074291 Exhaust thermistor gasket 100074296 Hi-limit switch for exhaust 100074289 Gasket 100074693 Inlet pipe packing (140H) Computer board 100342808 100342802 100342801 100342430 Rubber grommet 100076470...
Page 74: Output Temperature Chart
Owner's Guide Output Temperature Chart OUTPUT TEMPERATURE CHART These charts are based on properly sized gas lines and installation at 0-2,000 ft (0-610m). The water heater will de-rate approximately 4% per 1,000 ft (305 m) of elevation increase above 2,000 ft (914 m). To reduce the risk of scalding, install Thermostatic Mixing Valves (temperature limiting valves) at each point of use.
Page 75 Owner's Guide Output Temperature Chart 340H model Output Temperature vs. GPM (Max. 8.0 GPM) with Various Inlet Water temperature (L/M) 10.0 40°F（4°C) 50°F（10°C) 60°F（16°C） 70°（21°C) Set temp.°F(°C) (38) (40) (43) (45) (50) (52) (55) (57) (60) 40°F（4°C) (21.6) (19.9) (18.5) (17.3) (16.2) (15.2)
Page 76 68A255-1 2000534710 (REV. F)

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240h series 340h series 540h series140h indoor140h outdoor240h indoor ... Show all