American Water Heater 240HX3 Page 7 Installation Manual And Owner'S Manual Download

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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.

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 page 9 for proper clearances.

5. The water heater must be installed in a location where the proper amount of combustion air will be

available to it at all times without obstructions, or the indoor heater must be direct vented. See pages 13

to 29.

6. Install the water heater so it is level (left-to-right & front-to-back) and plumb (vertically).

7. Electrical service to the water heater requires a means of disconnection. This will allow power to the

water heater to be shut off for servicing and safety purposes.

8. 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 clearance from

any doorway or opening to prevent exhaust from entering a building. (Refer to pages 8, 11, 14 and 15.)

Check local code requirements prior to installation.

9. Carefully plan the installation location of the heater and vent terminations. Contaminants such as

aerosols, lint, and fine powders (including flour) can clog the air intake and reduce the operation of the

fan. This, in turn, can cause improper combustion and reduce the life of the water heater. Regularly

ensure that the area around the water heater, vent termination, and air intake are free of dust, debris,

and other contaminants. In environments with a high level of contaminants (laundry facilities, hair salons,

pet salons, chemical plants, commercial kitchens, etc.), direct venting is required.

10. The Indoor models 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 (60 °C), 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.

•

If the water heater is used as a direct-vent appliance, the unit requires 3ʺ or 4ʺ combustion air

supply pipe. The intake pipe must be sealed airtight. Refer to pages 13 to 29 for more detail.

• Terminating the venting through a sidewall is recommended for the direct-vent system.

• Running the exhaust vent and the intake pipe parallel is recommended.

• Terminating the exhaust and intake on the same wall/surface is recommended. Terminating in the

same pressure zone allows for pressure balancing, which prevents nuisance shutdowns.

• Only install the water heater in a heated area where below freezing temperatures cannot occur.

The warranty does not cover damage caused by freezing.

• The water heater must be securely mounted to a wall or other suitable structure.

• The venting system shall be installed in accordance with the water heater manufacturer's and

venting system manufacturer's instructions.

11. The Outdoor models must only be installed outdoors and only in an 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 3 in (76 mm) clearance from

the left and right sides of the unit to combustible and non-combustible surfaces.

Installation

Installation Manual

Summary of Contents for 240HX3

Page 1: ...y 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 WARNING If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or...

Page 2: ...al 30 Gas connections 30 Natural Gas supply piping 31 Propane LP supply piping 31 WATER CONNECTIONS 32 Pressure relief valve 32 X3 Scale Prevention Technology 33 CONDENSATE DRAIN 34 ELECTRICAL CONNECTIONS 36 TEMPERATURE REMOTE CONTROLLER 37 Included accessories 37 Installation 37 APPLICATIONS 39 INITIAL OPERATION 40 Owner s Guide OPERATING SAFETY 42 NORMAL OPERATION 44 BUILT IN CONTROLLER AND REMO...

Page 3: ... 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 You may also download a manual from our website 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: ...X3 Indoor AT H3S DV SCM 340HX3 Outdoor AT H3S OS SCM 540HX3 Indoor AT H3 DV SCM 540HX3 Outdoor AT H3 OS SCM Natural Gas Input Operating Range BTU h Min 15 000 Max 160 000 Min 15 000 Max 180 000 Min 15 000 Max 199 000 Propane Input Operating Range BTU h Min 13 000 Max 160 000 Min 13 000 Max 180 000 Min 13 000 Max 199 000 Gas Connection 3 4 NPT Water Connections 3 4 NPT Water Pressure psi MPa 15 150...

Page 5: ...d water inlet Gas Hot water outlet Flow sensor Water control valve X3 Cartridge Gas valves Igniter Burner Inlet thermistor Outlet thermistor Bypass valve 540HX3 only Primary heat exchanger Exhaust HL Indoor only Exhaust thermistor Indoor only HX thermistor 540HX3 only Computer board Fan motor Condensate drain port Hi limit switch This diagram illustrates tankless water heater design concepts only ...

Page 6: ...sidered important but not hazard related NOTICE WARNING Water temperatures over 125 F 52 C can cause severe burns instantly or death from scalding The water temperature is set at 120 F 50 C from the factory to minimize any scalding risk Before bathing or showering always check the water temperature To reduce the risk of scalding install Thermostatic Mixing Valves temperature limiting valves at eac...

Page 7: ...nts with a high level of contaminants laundry facilities hair salons pet salons chemical plants commercial kitchens etc direct venting is required 10 The Indoor models 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 compon...

Page 8: ... to be installed under the water heater in case of leaks See the NOTICE below The water heater must be securely mounted to a wall or other suitable structure so that it is level left to right front to back and plumb vertically Failure to observe these warnings could result in severe personal injury death and or property damage NOTICE The warranty will not cover damage caused by water quality Only ...

Page 9: ...Pipe cover 3 Neutralizer kit 4 3 PVC concentric termination 5 Recess box 6 Non return valve 7 4 PVC Adapter for Non return valve INCLUDED ACCESSORIES Check that these items below are included with the water heater Installation manual and owner s guide Temperature remote controller kit Outdoor models only Refer to pp 10 and 35 Bird screen Indoor models only X3 cartridge Qty 2 Maintain all clearance...

Page 10: ...e 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 2 Pipe cover 100112718 TH PC03 for 240HX3 340HX3 540HX3 The pipe cover protects the plumbing pipes to the water heater from unexpec...

Page 11: ... of airborne debris that can be trapped inside the combustion chamber unless the system is direct vented Prohibited Prohibited 1 above grade and above an cipated snow level 1 min 1 min 1 min An cipated snow level Ensure that you meet the minimum clearances shown below for a direct vent termination Locate the outdoor water heater so it s vent terminal meets the following clearances Locate the vent ...

Page 12: ...FF No 5 ON OFF ON 1 2 3 4 5 6 7 8 9 10 No 3 OFF No 4 O N No 5 O N OFF ON 1 2 3 4 5 6 7 8 9 10 No 3 O N No 4 O N No 5 O N 540HX3 Lower bank of DIP switches OFF ON 1 2 3 4 5 6 No 2 OFF No 3 OFF No 4 OFF OFF ON 1 2 3 4 5 6 No 2 OFF No 3 O N No 4 OFF OFF ON 1 2 3 4 5 6 No 2 OFF No 3 OFF No 4 O N OFF ON 1 2 3 4 5 6 No 2 OFF No 3 O N No 4 O N OFF ON 1 2 3 4 5 6 No 2 O N No 3 O N No 4 O N Altitude DIP sw...

Page 13: ...stainless steel Regarding exhaust pipe refer to pages 21 to 27 Use of cellular core PVC ASTM F891 cellular core CPVC or Radel polyphenylsulfone in nonmetallic venting systems is prohibited Covering non metallic vent pipe and fittings with thermal insulation is prohibited Sidewall venting is recommended for the Indoor model Vertical venting roof termination is acceptable Slope horizontal venting se...

Page 14: ...ance above paved sidewalk or paved driveway located on public property 7 ft 213 cm 7 ft 213 cm M Clearance under veranda porch deck or balcony 1 ft 30 cm 1 ft 30 cm Clearance in accordance with local installation codes and the requirements of the gas supplier A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both d...

Page 15: ...d Snow level Exhaust Termination 2ft 610mm min 1ft 305mm min 1ft 305mm min Inside corner Inside corner Anticipated Snow level 2ft 610mm min 1ft 305mm min 1ft 305mm min Combined intakeand exhaust termination For direct vent sidewall terminations that use two separate penetrations for the intake and exhaust keep the termination clearances shown in the diagrams on the right X3 CARTRIDGE is not shown ...

Page 16: ...ination must be a horizontal distance of at least 2 ft 610 mm from a wall or surface unless specified differently by local code Failure to observe this warning may result in severe personal injury or death WARNING Angled roof termination Anticipated snow level 2 ft 610 mm min 1 ft 305 mm min 1 ft 305 mm min 1 ft 305 mm min Exhaust Intake Multiple flat roof terminations An cipated snow level 2 610 ...

Page 17: ...property damage Examples of locations that require outside air due to chemicals include Beauty salons Photo processing labs Indoor pools Laundry hobby or craft rooms Chemical storage areas Restaurants Products such as aerosol sprays detergents bleaches cleaning solvents gasoline air fresheners paint and varnish removers and refrigerants should not be stored or used near the water heater Does your ...

Page 18: ...utside ventilation if you want to provide combustion air with outside ventilation If the air volume of the room is greater than the required air volume it may be possible to install the water heat er without outside ventilation However be sure to consider the effects of exhaust fans Exhaust fans can affect the amount of combustion air that is available in your home Appliances such as furnac es who...

Page 19: ... For metal louvers or grilles 75 Follow these rules to ensure that vents and ducts provide adequate air flow Each vent opening must be no smaller than 100 in2 645 cm2 Ducts must have the same cross sectional area as free area of the opening Rectangular ducts must have a minimum dimension of no less than 3 in 76 mm All screens must have mesh or larger Moveable louvers must be locked open or interco...

Page 20: ...btu h Conﬁned Space 12 305mm maximum Gable vent to outdoors Install above insulation Figure 5 Single opening Conﬁned Space 1 in2 6 5 cm2 per 3 000 btu h Alternative Opening Location Figure 6 Two permanent openings Two permanent Openings 1 in2 6 5 cm2 per 1 000 btu h 12 305mm maximum 12 305mm maximum Conﬁned Space Figure 4 Horizontal duct openings 1 in2 6 5 cm2 per 2 000 btu h Conﬁned Space Outlet ...

Page 21: ... 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 Installation Installation Manual Diameter Max No of Elbows Max Vertical and Horizontal Total Vent Length 3 in 5 70 ft 21 3 m 4 in 5 100 ft 30 5 m For each elbow added deduct 5 ft 1 5 m from max vent le...

Page 22: ...direct vent installation 3 inch 4 inch vent installation Vertical Installation Roof flashing Roof Fire stop Horizontal Installation Wall Connect between exhaust vent collar and piping See the instructions on the next page Hanger Hanger For details on the vent components refer to the vent manufacturer s instructions Connect between exhaust vent collar and piping See the instructions on the next pag...

Page 23: ... 5 to 50 ft 1 5 to 15 2 m DEFAULT 51 to 100 ft 15 3to30 5m 240HX3 340HX3 Indoor OFF ON 1 2 3 4 5 6 7 8 9 10 No 6 O N No 7 OFF OFF ON 1 2 3 4 5 6 7 8 9 10 No 6 OFF No 7 OFF OFF ON 1 2 3 4 5 6 7 8 9 10 No 6 O N No 7 O N 540HX3 Indoor Upper bank of DIP switches OFF ON 1 2 3 4 5 6 7 8 No 3 O N No 4 OFF OFF ON 1 2 3 4 5 6 7 8 No 3 OFF No 4 OFF OFF ON 1 2 3 4 5 6 7 8 No 3 O N No 4 O N PVC concentric ter...

Page 24: ...pter Female 3 street elbow with bird screen How to remove 3 PVC adapter from the intake exhaust collar Remove the 3 adapter when using vent material other than PVC or CPVC POLYPROPYLENE VENTING WARNING Do not mix parts or fittings of different material types and do not mix pipe fittings or joining methods from different manufacturers Combustion exhaust can contain carbon monoxide and must be prop ...

Page 25: ...eeds 5 ft 1 5 m support the vent run at 3 ft 0 9 m intervals with over head hangers Diameter Max No of Elbows Max Vertical and Horizontal Total Vent Length 4 in 5 100 ft 30 5 m For each elbow added deduct 5 ft 1 5 m from max vent length Excludes vent terminators termination elbows or rain caps No of Elbows Max Vertical or Horizontal Vent Length No of Elbows Max Vertical or Horizontal Vent Length 0...

Page 26: ...ow with bird screen 1 Connect a 4 stainless steel vent pipe or appliance adapter to the exhaust vent collar 2 Connect a 4 elbow to the intake vent collar Connect 4 stainless steel vent straight pipes or appliance adapters to the exhaust intake vent collar 4 vent connection for single vent installation Remove the 3 adapter when using metal vent Exhaust vent collar Female Intake vent collar Female 3...

Page 27: ...ptor 100112416 2NVBFU4 2ZVB04 4 exhaust 3 intake DV concentric termination 5 10 127 254 mm adjustability 100112550 2NVHTC43S 2SVSHTC43S 4 exhaust 3 intake DV concentric termination 12 18 305 457 mm adjustability 100112551 2NVHTC43 2SVSHTC43 4 Sidewall termination adjustable pipe 100187853 2NVBV4 n a 4 exhaust 3 intake concentric termination 5 to 10 127 254 mm adjustability 100112550 2NVHTC43S 2SVS...

Page 28: ...on venting pieces and components the manufacturer recommends Centrotherm s vent line Installation Installation Manual Intake wall Exhaust Roof Condensate drain port Non Return Valve Exhaust Intake wall Roof Non Return Valve Condensate drain port Allowable Indoor models for common venting 240HX3 340HX3 540HX3 240H 340H 540H 540P CT 199 NOTICE For details on the installation of a common vent system ...

Page 29: ...t bird screen in elbow terminations Common venting system Vent Diameter D Max No of water heaters Max Vertical and Horizontal Total Vent Length L DIP switch settings 4 in 2 25 ft 7 6 m 240HX3 340HX3 Indoor OFF ON 1 2 3 4 5 6 7 8 9 10 No 6 ON No 7 OFF 540HX3 Indoor Upper bank of DIP switches OFF ON 1 2 3 4 5 6 7 8 No 3 ON No 4 OFF 5 in 2 50 ft 15 2 m 3 20 ft 6 1 m 6 in 2 100 ft 30 5 m 3 75 ft 22 9 ...

Page 30: ...upply pressure to the heater is greater than the specified maximum a field supplied regulator is required The regulator must lower the gas pressure within the approved range Install the gas regulator according to the manufacturer s instructions The regulator must be sized for the water heater input and provide the specified pressures that are listed on the rating plate In the absence of minimum in...

Page 31: ...ipe size 5 1 5 m Length 1 1 4 Pipe size Gas sizing example Natural Gas Unit kBTU per hour Pipe Size Length Diameter 10 3 0 m 20 6 1 m 30 9 1 m 40 12 2m 50 15 2m 60 18 3m 70 21 3m 80 24 4m 90 27 4m 100 30 5m 125 38 1m 150 45 7m 200 61 0m 1 2 268 184 148 126 112 101 93 87 82 77 68 62 53 3 4 567 393 315 267 237 217 196 185 173 162 146 132 112 1 1 071 732 590 504 448 409 378 346 322 307 275 252 213 1 ...

Page 32: ...ed water supply system Contact the water supplier or a local plumbing professional on how to correct this situation The pressure relief valve must be manually operated periodically to check for correct operation Before operating the valve manually check that it will discharge in a place for secure disposal No valve must be placed between the relief valve and the water heater WARNING Hot water coul...

Page 33: ...s may impact the efficiency of X3 such as excessive iron 0 3 mg l Consult a water quality expert to determine if your water is within acceptable X3 and EPA guidelines X3 Technology Installation Removal Installation 1 Align the symbol with the symbol and insert the X3 Cartridge into the X3 manifold 2 Turn it right until the symbol aligns with the symbol Removal 1 Close the shutoff valve on the cold...

Page 34: ...ass is required if a neutralizer is installed The condensate drain is at atmospheric pressure non pressurized and therefore must be allowed to drain freely with gravity only Ensure that the condensate drain tube is not plugged blocked or kinked Ensure that it slopes downward to allow condensate to flow freely All portions of the condensate drain neutral izer and drain tube must be at a lower eleva...

Page 35: ...e drain tube Neutralizercartridge Included with Neutralizer accessory 1 2 MPT x 3 8 FPT Included with Neutralizer accessory 1 2 Condensate drain tube 1 2 Condensate drain tube 1 2 FPT x 1 2 HB Included with Neutralizer accessory 1 2 Condensate drain tube 1 2 MPT Condensate connection 2 50 mm MIN distance Floor drain standpipe pump or other acceptable drain Floor drain standpipe pump or other accep...

Page 36: ...nstead of a junction box The following procedure is for the outdoor model only 1 The water heater must be electrically grounded Do not attach the ground wire to either the gas or the water piping 2 The water heater requires a 120 VAC 60 Hz electrical power supply that is properly grounded A proper disconnect i e on off switch power plug etc controlling the main power to the water heater must be pr...

Page 37: ...below are included with the remote controller Temperature remote controller Screws Fork terminals Manual Remote controller cable Qty 1 Qty 2 Qty 4 Qty 1 Qty 1 Installation This remote controller is NOT waterproof The water heater can only have one remote controller Do not install in high temperature environments high humidity conditions outdoors in direct sunlight or within the reach of children M...

Page 38: ...k terminals to the connector base on the back side of the remote controller with two screws Make sure the terminals are firmly fixed See the above instructions for installation of the remote controller 5 Pull the remote controller cable through the hole at the bottom of the water heater s casing 6 Secure both controller cable terminals to the terminals on the computer board as shown below Secure t...

Page 39: ...ng valve manufacturer for the appropriate mixing valve for the application To reduce the risk of scalding install Thermostatic Mixing Valves temperature limiting valves at each point of use COLD WATER SUPPLY GAS HOT WATER TO FIXTURES STANDARD NON RECIRCULATION SINGLE UNIT PIPING CONFIGURATION LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE DRAIN BALL VALVE CHECK VALVE COLD HOT BUILD...

Page 40: ...Thermostatic Mixing Valves temperature limiting valves at each point of use 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 call a qualified service technician Forced repair may result in a fire or explosion ...

Page 41: ...mmend 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 You may also download a manual from our website 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 42: ...empted repair may result in a fire or explosion D 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 1 STOP Read the safety information above on this label 2 Turn off all electric power to the appliance 3 Do not attempt to light the burner by h...

Page 43: ...of children 4 Water heater has a main burner which may come on at any time and will ignite flammable vapors Vapors 1 Cannot be seen 2 Are heavier than air 3 Go a long way on the floor 4 Can be carried from other rooms to the main burner by air currents Do not install water heater where flammable products will be stored or used unless the main burner is at least 18 above the floor This will reduce ...

Page 44: ... built in controller The controller has an energy saving mode Five minutes after the water heater stops operating the backlight of the controller turns off The backlight of the remote will turn back on once the water heater begins firing again NOTICE GENERAL 1 Open a cold water fixture 2 Mix hot water with the cold water to get the correct temperature water 3 When finished close the water fixtures...

Page 45: ... Press and hold the INFO button and the HOT button for at least 3 seconds The remote will emit a beep and change to 125 F 52 C 4 Press the HOT button to set up to 140 F 60 C 540HX3 model only Increasing temperature above 140 F 60 C To reduce the risk of scalding install Thermostatic Mixing Valves tem perature limiting valves at each point of use 1 The water heater must be in Stand By to increase t...

Page 46: ... Unit conversion mode Units of measure can be changed from Imperial to Metric and vice versa For example temperature can be changed from F to C Flow rate will also change from gallons per minute to liters per minute when this setting is changed Follow this procedure to change this setting Operation Screen on the controller Built in controller Remote controller 1 Press the ON OFF button on the cont...

Page 47: ...C Computer board 120 F 50 C DEFAULT 140 F 60 C No 9 OFF No 9 ON 240HX3 340HX3 OFF ON 1 2 3 4 5 6 7 8 9 10 OFF ON 1 2 3 4 5 6 7 8 9 10 Bank of DIP switches NOTE The dark squares indicate the correct DIP switch positions Lower bank of DIP switches 120 F 50 C DEFAULT 140 F 60 C OFF ON 1 2 3 4 5 6 No 5 OFF OFF ON 1 2 3 4 5 6 2 3 4 5 6 No 5 ON 540HX3 Computer board Upper bank of DIP switches Lower bank...

Page 48: ...kup power supply In the event of a power outage during freezing conditions the manufacturer recommends draining water page 50 from the water heater and disconnecting power In any areas subject to freezing temperatures the manufacturer highly recommends an indoor installation with an indoor model The manufacturer also highly recommends the use of a backflow preventer sold separately to minimize the...

Page 49: ...ecked annually for dust lint grease or dirt by a licensed technician Visually check the burner flames see below through the burner window in the burner assembly located at the middle of the water heater Satisfactory Blue flame Unsatisfactory Flame blowing up Unsatisfactory Red or Yellow flame The manufacturer recommends having the unit checked once a year or as necessary by a licensed technician I...

Page 50: ...at exchangers Unscrew this drain plug to drain the water line as well 8 Drain the X3 Cartridge Have a bucket or pan to catch water from the X3 Cartridge To remove the X3 Cartridge turn it left until the symbol aligns with the symbol Pull down to remove it from the water heater 9 Drain the water in the X3 Cartridge completely 10 Wait a few minutes to ensure all water has completely drained from the...

Page 51: ...essure should not exceed 1 5 W C Pressure drops that exceed 1 5 W C can indicate restricted gas flow undersized gas lines and or undersized supply regulators 9 Measure gas supply pressure at minimum heater operation Reduce water flow so the heater is running at minimal operation Press the MIN button on the computer board Refer to the diagrams below Take a supply gas pressure reading and verify tha...

Page 52: ... L min through the water heater p 44 Is the unit frozen p 48 Is there enough gas in the tank cylinder For Propane models The hot water turns cold and stays cold Is the flow rate enough to keep the water heater running p 44 Is the gas supply valve open fully p 40 Is the filter on the cold water inlet clean p 49 Are the fixtures clean of debris and obstructions Check if the flow rate is too low p 44...

Page 53: ...yed on the built in controller and remote controller The green LED on the computer board will flash in a pattern shown on the next page Consult the table on the following pages for the description of each error code Error code indicator on the built in temperature controller Error code indicator on the remote controller Error code on the computer board Indicated by 1 2 second flashes on the Green ...

Page 54: ...he intake air terminal and the exhaust terminal Check if there is grease and or dirt in the burner Part 101 and the fan motor Part 103 especially if the water heater has been installed in a contaminated area 111 Three Flashes Ignition failure Check if the Hi limit switch Part 412 is properly functioning Check for connection breakage of wires Part 413 708 709 711 burn marks on the computer board Pa...

Page 55: ...akage of wires Part 714 711 One Flash Gas solenoid valve drive circuit failure Refer to the 111 and 121 error codes 721 Six Flashes False flame detection For indoor models check if condensate drain is installed on the vent collar of the water heater Check if there is leaking from heat exchanger Part 401 741 N A Miscommunication between water heater and remote controller Check the model type of the...

Page 56: ...704 008 052 050 052 717 067 713 004 002 001 001 004 702 Components Diagram Owner s Guide Indoor Outdoor Temperatureremotecontroller 724 Case assembly 121 713 703 706 704 713 053 703 Surge box assembly COMPONENTS DIAGRAM Indoor 723 722 056 Built in controller ...

Page 57: ...W Remote controller Built in controller W BL R BK 722 Only Indoor 540HX3 Thermostat BK Y Hi limit switch for exhaust Exhaust thermistor W W W W 721 Indoor Only 540HX3 Drain plug detector G G 721 Outdoor Only 540HX3 Drain plug detector G G 9 8 7 6 5 4 3 2 1 10 OFF Remote controller R BK R W BK Ground G O W Y BL O R PCB W 120 VAC G Ground SW Ground W BK G Gas Propor onal Valve W R BK BK W BK BK Outl...

Page 58: ...1 104 115 106 107 108 110 109 111 711 112 062 053 053 709 053 401 103 105 065 054 113 114 102 063 121 708 119 151 118 055 051 150 057 055 063 117 053 116 062 066 714 719 707 709 711 117 G Manifold assembly Burner assembly Burner assembly 540HX3 ...

Page 59: ...72 067 153 152 053 718 470 415 401 F 451 422 414 451 451 458 458 458 E 468 462 467 064 462 473 A 052 068 477 416 725 463 D 403 456 460 458 462 B A Bypass section 540HX3 540HX3 240HX3 340HX3 Water Way assembly Components Diagram Owner s Guide Water outlet section 410 455 408 458 454 462 C 052 409 417 Water inlet section 402 460 456 474 420 461 458 404 417 407 454 405 457 406 052 059 451 458 462 D 5...

Page 60: ...d screw M3x6 SUS3 100074272 059 Truss head screw M4x6 SUS3 100074512 060 Tap tight screw M4x12 100076269 061 Screw M3x6 Plus bind FEZN N A 062 Pan screw M4x8 MFZN 100074244 063 Wire clamp 60 100074233 064 Screw M4x10 N A 065 Screw M3x6 SUS3 Binding head 100074514 066 Pan screw M4x10 100074247 067 Pan screw M4x10 for 3 adapter N A 068 Truss screw M4 12 Coated SUS3 N A 101 Burner assembly 100074670 ...

Page 61: ... Inlet heater for Outdoor model 100074684 416 Drain plug detector assembly 100342423 417 Inlet heater 100074629 418 Secondary heat exchanger for Indoor model 100074700 Secondary heat exchanger for Outdoor model 100074701 419 3ʺ PVC adapter 100310706 420 Inlet pipe heater 100076328 421 Upper drain tube N A 422 Band A N A 423 Lower drain tube N A 450 Pipe heater fixing plate 100074273 451 Heater fix...

Page 62: ...1 709 Flame rod wire 100074652 711 Igniter assembly 100074640 713 Switch wire with thermostat for Indoor model 100342431 Switch wire with thermostat for Outdoor model 100342432 714 Proportional gas valve wire 100074657 715 24V cables for 540HX3 model N A 100074658 716 Computer board cover 100074375 717 Cable clamp for Indoor model N A 718 Exhaust thermistor for Indoor model 100074316 719 Remote fi...

Page 63: ...4 0 3 8 60 F 16 C 8 0 7 6 6 8 6 2 5 7 5 3 4 9 4 6 4 3 70 21 C 8 0 8 0 8 0 7 6 6 8 6 2 5 7 5 3 4 9 0 0 2 0 4 0 6 0 8 0 10 0 40 F 4 C 50 F 10 C 60 F 16 C 70 21 C Output Hot Water GPM Set temp F C Incoming temp 30 15 0 L M 21 6 30 3 30 3 25 9 19 9 30 3 28 8 23 5 18 5 30 3 25 9 21 6 17 3 28 8 23 5 19 9 16 2 25 9 21 6 18 5 15 2 23 5 19 9 17 3 14 4 21 6 18 5 16 2 13 6 19 9 17 3 15 2 12 9 18 5 16 2 14 4 ...

Page 64: ...3PL009 2000599585 Rev B ...

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