Westinghouse WGRT 150 Series Installation Start-Up Maintenance Parts
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Westinghouse WGRT 150 Series Installation Start-Up Maintenance Parts

Residentialtankless water heater
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NOTICE: Westinghouse reserves the right to make product changes or updates without notice and will not be held liable for
typographical errors in literature.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
The surfaces of these products contacted by consumable water contain less than 0.25% lead by weight, as required by the Safe
Drinking Water Act, Section 1417.
WARNING: If the information in these instructions is not followed exactly, a fire or explosion may 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.
Do not try to light any appliance.
Do not touch any electrical 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 provided by a qualified installer, service agency or the gas supplier.
Improper installation, adjustment, alteration, service, or maintenance can cause injury, property damage, or death. Refer to
this manual. Installation and service must be performed by a qualified installer, service agency, or gas supplier.
California Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer, birth defects, or
other reproductive harm.
**A suffix of "NG" denotes natural gas; "LP" denotes propane gas
WHAT TO DO IF YOU SMELL GAS
Residential
Tankless
Water Heater
INSTALLATION
START-UP
MAINTENANCE
WGRT**150 / WGRT**199
WHL-004 REV. 5.26.17
PARTS

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  • Page 1 WGRT**150 / WGRT**199 **A suffix of “NG” denotes natural gas; “LP” denotes propane gas NOTICE: Westinghouse reserves the right to make product changes or updates without notice and will not be held liable for typographical errors in literature. NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
  • Page 2 The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels, or to important product information. DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
  • Page 3 In some circumstances, the property owner or his/her agent assumes the role, and at government installations, the commanding officer or departmental official may be the AHJ. NOTE: Westinghouse reserves the right to modify product technical specifications and components without prior notice. FOR THE INSTALLER This manual must only be used by a qualified heating installer/service technician.

  • Page 4: Table Of Contents

    INSTALLATIONS MUST COMPLY WITH: Local, state, provincial, and national codes, laws, regulations and ordinances. The latest version of the National Fuel Gas Code, ANSI Z223.1, from American Gas Association Laboratories, 8501 East Pleasant Valley Road, Cleveland, OH 44131. In Canada – CGA No. B149 (latest version), from Canadian Gas Association Laboratories, 55 Scarsdale Road, Don Mills, Ontario, Canada M3B 2R3.
  • Page 5 E. VENT TERMINATION ................................25 1. Direct Vent, Two Pipe Roof and Sidewall Vent Terminations ....................25 2. Direct Vent, Optional Horizontal and Vertical Vent Kits ......................26 3. Screen Installation ..................................26 4. Power Venting, Indoor Combustion Air Installation in Confined or Unconfined Space ............27 F.

  • Page 6: Part 1 - Items Shipped With The Water Heater

    3. Inlet / DHW / Operating Temperature SENSORS ........................62 PART 11 – FINAL INSTALLATION CHECKLIST ........................63 PART 12 – TROUBLESHOOTING ............................65 PART 13 – MAINTENANCE PROCEDURES ..........................66 REPLACEMENT PARTS ................................70 Limited Warranty for Residential Tankless Water Heaters ......................75 MAINTENANCE REPORT ................................

  • Page 7: Part 2 - Safety Regulations

    Westinghouse cannot anticipate every circumstance that might involve a potential hazard. Each installation has its own specialized characteristics, requirements, and possible hazards. Therefore, all possible incidents are not included in these warnings. Proper and safe installation, operation, and service are the responsibility of the professional service technician.

  • Page 8: Improper Combustion

    Certain local codes require additional temperature limits. In addition, certain types of systems may operate at temperatures below the minimum set point of the limit provided with the water heater. Contact Westinghouse for additional overheat controls.

  • Page 9: Freeze Protection

    F. FREEZE PROTECTION Consider water heater piping and installation when determining water heater location. NOTE: Damages resulting from incorrect installation or from use of products not approved by Westinghouse ARE NOT covered by warranty. APPROXIMATE TIME / TEMPERATURE RELATIONSHIPS IN SCALDS More than 5 minutes 1 ½...

  • Page 10: Part 3 - Technical Specifications

    PART 3 – TECHNICAL SPECIFICATIONS MODEL WGRT**150 WGRT**199 Installation Indoor, Wall Hung, Fully Condensing Minimum / Maximum Input (Btu/Hr) 15,000 / 150,000 19,900 / 199,000 F Rise 8.1 Gal 11 Gal Hot Water F Rise 6.3 Gal 8.5 Gal Capacity F Rise 3.7 Gal 5 Gal...
  • Page 11 Figure 1 – 150 Model Specifications and Dimensions DESCRIPTION DIAMETER 2” Exhaust Outlet Pipe 2” Air Intake ¾” Gas Inlet ¾” DHW Outlet Adapter ¾” DHW Inlet Adapter ½” Condensate Adapter DHW Inlet Filter Table 5 – 150 Model Adapter Specifications WHL-004 REV.
  • Page 12 Figure 2 – 150 Model Components NUMBER COMPONENT DESCRIPTION NUMBER COMPONENT DESCRIPTION Exhaust Vent Adapter Cold Water Inlet Air Inlet Pipe Water Adjustment Valve Ignition Transformer Air Pressure Switch Igniter Gas Inlet Pipe Flame Detection Sensor Primary Heat Exchanger Assembly Hot Water Outlet Secondary Heat Exchanger Assembly Manual Power Switch...
  • Page 13 Figure 3 – 199 Model Specifications and Dimensions DESCRIPTION DIAMETER 3” Exhaust Outlet Pipe Air Intake 3” ¾” Gas Inlet ¾” DHW Outlet Adapter ¾” DHW Inlet Adapter ½” Condensate Adapter DHW Inlet Filter Table 7 – 199 Model Adapter Specifications WHL-004 REV.

  • Page 14: Part 4 - Prepare Water Heater Location

    Figure 4 – 199 Model Components NUMBER COMPONENT DESCRIPTION NUMBER COMPONENT DESCRIPTION Exhaust Vent Adapter Exhaust Duct Air Inlet Pipe Gas Valve AGM (Air Gas Mixer) Gas Inlet Pipe 2 Ignition Transformer BLDC Fan Igniter Air Intake Pipe Adapter Flame Detection Sensor Gas Inlet Adapter Primary Heat Exchanger Assembly Freeze Protector...

  • Page 15: Before Locating The Water Heater

    The water heater should be located near a floor drain, or installed in proximity to an adequately drained drain pan. Westinghouse WILL NOT be held liable for leakage damages. To conserve water and energy, insulate all water piping, especially the hot and recirculation water lines.

  • Page 16: Leveling

    Do not introduce toxic chemicals, such as antifreeze or water heater treatments, into the water heater or any piping meant for potable water purposes. Ensure that all piping and components connected to the water heater are suitable for potable water applications. Do not use this water heater for space heating applications.

  • Page 17: Exhaust Vent And Intake Pipe

    The space must be provided with correctly sized combustion/ventilation air openings for all other appliances located in the space with the water heater. For power venting installations using room air for combustion, refer to the venting section, this manual, for descriptions of confined and unconfined spaces.

  • Page 18: Removing A Water Heater From A Common Vent System

    PRODUCTS TO AVOID AREAS LIKELY TO HAVE CONTAMINANTS Spray cans containing fluorocarbons Dry cleaning/laundry areas and establishments Permanent wave solutions Swimming pools Chlorinated waxes/cleaners Metal fabrication plants Chlorine-based swimming pool chemicals Beauty shops Calcium chloride used for thawing Refrigeration repair shops Sodium chloride used for water softening Photo processing plants Refrigerant leaks...

  • Page 19: Wall-Mounting The Water Heater

    Remove all sides of the shipping crate to allow the water heater to be lifted into its installation location. J. WALL-MOUNTING THE WATER HEATER The water heater must be installed on a wall that can bear its weight (more than 88 lbs. when fully plumbed and full of water). Installing the water heater on a wall which cannot support its weight could result in property damage, personal injury, or death.

  • Page 20: Intake Pipe And Exhaust Vent Guidelines

    A. INTAKE PIPE AND EXHAUST VENT GUIDELINES 1. Vent system must be installed in accordance with local codes, or, in absence of local codes, the National Fuel Gas Code, ANSI Z223.1 / NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Code. 2.
  • Page 21  Do not use the water heater to support any piping.  DO NOT vent near soffit vents, crawl space vents, or other areas where condensate or vapor could create a nuisance or hazard or cause property damage.  DO NOT vent where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valve, or other equipment.
  • Page 22 Figure 7 – Vent Termination Detail DESCRIPTION CANADA Clearance above grade, veranda, porch, deck, or balcony 1 foot (30 cm) Direct 1 foot Vent Clearance to window or door that may be opened 3 feet (91 cm) Power 4 feet below or to side of Vent opening;...

  • Page 23: Approved Vent Materials

    When installing AL29-4C vent piping, install a PVC-to-stainless adapter at the water heater vent connection, and at the termination when using a Westinghouse PVC termination kit. DO NOT mix AL29-4C piping from different manufacturers unless using adapters specifically designed for the purpose by the manufacturer.

  • Page 24: Tightening Water Heater Collar To Exhaust Vent And Intake Pipe

     2.5 feet (.75M) for each additional 3” 45 elbow  8 feet (2.4M) for each additional 2” 90 elbow  4 feet (1.2M) for each additional 2” 45 elbow  Some terminations are considered elbows, and deduction should be applied. For example, a turndown 90 or an open T termination should be considered a 90 elbow.

  • Page 25: Vent Termination

    E. VENT TERMINATION 1. Direct Vent, Two Pipe Roof and Sidewall Vent Terminations Figure 10 – Direct Vent, Roof and Sidewall Vent Terminations All vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum of ¼” per foot back to the appliance to allow drainage of condensate.

  • Page 26: Direct Vent, Optional Horizontal And Vertical Vent Kits

    2. Direct Vent, Optional Horizontal and Vertical Vent Kits Figure 11 – Direct Vent, Vent Terminations (With Optional Kits) All vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum of ¼” per foot back to the appliance to allow drainage of condensate.

  • Page 27: Power Venting, Indoor Combustion Air Installation In Confined Or Unconfined Space

    4. Power Venting, Indoor Combustion Air Installation in Confined or Unconfined Space This appliance requires fresh, uncontaminated air for safe operation and must be installed in a mechanical room where there is adequate combustion and ventilating air. NOTE: To prevent combustion air contamination, see Table 10. Combustion air from the indoor space can be used if the space has adequate area or when air is provided through a duct or louver to supply sufficient combustion air based on the appliance input.
  • Page 28 Figure 14 – NOTE: These drawings are meant to demonstrate system venting only. The installer is responsible for all equipment and detailing required by local codes. WHL-004 REV. 5.26.17...

  • Page 29: Common Vent Piping - 199 Model Only

    F. COMMON VENT PIPING – 199 MODEL ONLY! DO NOT ATTEMPT to common vent 150 model water heaters. Doing so will result in property damage, severe personal injury, or death. Common Vented water heaters must be direct vented, with an exhaust vent and intake air pipe vented to the outdoors.

  • Page 30: Recommended Exhaust Pipe Transitions

    2. RECOMMENDED EXHAUST PIPE TRANSITIONS Figure 15 – Recommended Exhaust Pipe Transitions 3. TWO PIPE VENT SYSTEM (DIRECT VENT) DO NOT ATTEMPT to common vent 150 model water heaters. Doing so will result in property damage, severe personal injury, or death.
  • Page 31 Figure 16 – Common Vented Water Heaters – Unbalanced Venting (199 Model) All vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum of ¼” per foot back to the appliance to allow drainage of condensate. When placing support brackets on vent piping, the first bracket must be within 1 foot of the appliance and the balance at 4 foot intervals on the vent pipe.
  • Page 32 Figure 17 –Common Vented Direct Vent Configurations (199 Model) All vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum of ¼” per foot back to the appliance to allow drainage of condensate. When placing support brackets on vent piping, the first bracket must be within 1 foot of the appliance and the balance at 4 foot intervals on the vent pipe.

  • Page 33: Part 6 - Install The Condensate Drain

    PART 6 – INSTALL THE CONDENSATE DRAIN 1. Due to its efficient design, the water heater produces condensate (water) as a normal by-product. This condensate is acidic, with a pH level between 3 and 4. This condensate must be drained away from the water heater and disposed in accordance with all local regulations.

  • Page 34: Lp (Liquid Propane) Gas Pipe Sizing

    Maximum Natural Gas Delivery Capacity – Length of Black Iron Pipe (Sch. 40 Metallic) in Feet Cubic Feet per Hour (0.60 Specific Gravity, 0.5 WC Pressure Drop) Pipe Size ½” ¾” 1” 1 ¼” 1390 1 ½” 2090 1430 1150 2”...
  • Page 35 Figure 19 – Gas Line With Shut-Off Valve Detail 6. Test the gas pressure to make sure it meets the minimum standards and does not exceed the maximum standards of the water heater. 7. Leak test the gas line pipe before placing the water heater in operation. Only use approved leak detector liquid solutions to check for leaks.

  • Page 36: Additional Precaution For Excess Flow Valve (Efv)

    C. ADDITIONAL PRECAUTION FOR EXCESS FLOW VALVE (EFV) If an excess flow valve (EFV) is in the gas line, check the manufacturer’s minimum and maximum flow capacity ratings. An improperly sized EFV will not allow for a full flow of gas to the water heater and will cause the water heater to malfunction. See Figure 22.

  • Page 37: Part 8 - Water Piping

    2. When low fire settings have been obtained, flip DIP switch seven (7) to its original (OFF) position. This will return the appliance to normal mode. 3. Flip DIP switch six (6) to ON (high fire). Again check combustion readings with a combustion analyzer. 4.
  • Page 38 Figure 26 – DHW Piping, Single Water Heater Figure 27 – Piping with Recirculation NOTE: These drawings are meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. WHL-004 REV. 5.26.17...
  • Page 39 Figure 28 – Water Heater with Storage Tank Figure 29 – Water Heater with Storage Tank and Recirculation NOTE: These drawings are meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. WHL-004 REV.
  • Page 40 Figure 30 – Multiple Water Heater Piping – Cascaded System Figure 31 – Multiple Water Heater Piping – Cascaded System - Recirculation NOTE: These drawings are meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes.
  • Page 41 Figure 32 – Multiple Water Heater Piping – Cascaded System with Storage Tank Figure 33 – Multiple Water Heater Piping – Cascaded System with Storage Tank and Recirculation WHL-004 REV. 5.26.17...
  • Page 42 Figure 34 – Water Heater with Air Handler – NOTE: There is a Built-In Flow Check in the Air Handler Loop NOTES: 1. Minimum pipe size should match connection size. Upsize pipe accordingly if greater flow is required. 2. A thermal expansion tank suitable for potable water must be sized and installed within this piping system between the backflow preventer and the cold water inlet.
  • Page 43 Figure 35 – Pressure Drop through the Heat Exchanger RECOMMENDED WATER PIPE SIZE ∆T = 77 ∆T = 45 ∆T = 35 Number Flow Water Water Pipe Flow Rate Pipe Flow Rate Water Pipe of units Rate Velocity Velocity Dia. (in) (GPM) Dia.

  • Page 44: Pressure Relief Valve

    E. PRESSURE RELIEF VALVE An external pressure relief valve must be installed on this water heater. When installing, observe the following guidelines. Failure to comply with these guidelines can result in substantial property damage, personal injury, or death. This water heater must be provided with an approved 150 psi, ¾”...

  • Page 45: Wiring Information

    ELECTRICAL SHOCK HAZARD – To ensure safety, turn off electrical power supply at service entrance panel before making any electrical connections to avoid possible electric shock hazard. Failure to do so could result in property damage, serious personal injury, or death. A.
  • Page 46 SYSTEM CONTROL SETTINGS MAXIMUM FLAME DETECTING VOLTAGE 2.5V PRE-PURGE TIME (Tp) Maximum 10 seconds, minimum 1 second SAFETY TIME (IGNITING TIME) (Ts) 3.5 seconds IGNITING INTERVAL TIME <10 seconds POST-PURGE TIME (Tip) 2 minutes OVER-HEATING 1,2,3 PROTECTION DETECTION TIME <1 seconds TEMPERATURE SENSOR FAULT DETECTION TIME <2 seconds # OF IGNITION ATTEMPTS (Ntl)
  • Page 47 Figure 39 – 150 Model Electrical Wiring Diagram WHL-004 REV. 5.26.17...
  • Page 48 Figure 40 – 150 Model Ladder Diagram WHL-004 REV. 5.26.17...
  • Page 49 Figure 41 – 199 Model Electrical Wiring Diagram WHL-004 REV. 5.26.17...
  • Page 50 Figure 42 – 199 Model Ladder Diagram WHL-004 REV. 5.26.17...
  • Page 51 CONNECTOR DESCRIPTION HT SELV NO. OF LOCATION BOARD SILK UNUSED Power Supply Line UNUSED Ignitor L(HT) Ceramic Heater (Freeze Protection) 65001WS-12 HT (120V~) Gas Valve EARTH GROUND Power Supply Neutral 9-12 AC Power COM Line RS485 + RS-485 SELV (5V) SMW250-03 RS485 - Unused...
  • Page 52 CONNECTOR DESCRIPTION HT SELV NO. OF LOCATION BOARD SILK Flame Detect Sensor OP.S Operating Water Temperature Sensor DH.S DHW Temperature Sensor Inlet Water Temperature Sensor SELV (5V) LWD1140-14 BG.S Exhaust Temperature Sensor ST.S Unused SP.S Unused AGM Stepper Motor Coil / Y Phase SELV (24V) CN12 AGM Stepper Motor Coil / X Phase...

  • Page 53: Part 10 - Operating System Instructions

    PART 10 – OPERATING SYSTEM INSTRUCTIONS A. CONTROL PANEL Figure 43 – Water Heater Control Panel Detail B. LCD DISPLAY DESCRIPTIONS Figure 44 – LCD Display Detail LCD also features a backlit lamp that will illuminate:  When a user action is detected (a button is pressed) ...

  • Page 54: Changing The Dhw Set-Point

    After start-up, the display appears as follows. Figure 45 – Initial Display Screen The Control System can operate through user and service modes that have specific LCD outputs and dedicated controls, including:  Changing the Set-Point Temperature  Error Mode ...

  • Page 55: Status Display Mode

    G. STATUS DISPLAY MODE Status Display Mode will activate when button B is pressed and held for five seconds at Standby Mode. Figure 47 – Status Mode Screens Parameter Detail Description A: Li or A: GA Flow Unit Current Flow Unit (Li: Liters/min, GA: Gallons/min) b: Fr Fan Speed (RPM) Current Fan Speed RPM Value...

  • Page 56: Error Mode

    Restores System to Default Factory Settings System Reset (Burner operation time, Ignition cycles, and Supply power time 3: In (Factory Setting) will not be reset) Range: ON or OFF Displays Flow Rate in Liters/Minute or Gallons/Minute 4: Fu Flow Unit Range: GA or Li Adjusts Maximum Fan Speed 5: FH...
  • Page 57 open or shorts, etc.). The water heater shall enter a hard lockout if the condition indicates something more serious (flame, ignition, condensate line, etc.) To clear a hard lockout Error Code, press the Power button. The following screen will display when the water heater encounters an error.
  • Page 58 Error Code Error Code Description Possible Remedies This Error Code will go away when exhaust temperature decreases. If Error happens again: Exhaust Sensor Open or 1. Check exhaust temperature sensor. Ensure connections are secure. Er:35 Short 2. Check sensor resistance. If resistance is zero, replace the sensor. 3.

  • Page 59: Setting Up A Cascaded System

    Error Code Error Code Description Possible Remedies This Error Code will go away when the condition is remedied. If Error happens again: 1. Check the water heater cover. Ensure it is secure. Flame detection sensor can detect an external Flame Signal Detected Er:72 light source.
  • Page 60 12:Eh - Choose the vent option (ON – Common vent; OFF – individual vent) – It is very important to choose the proper settings to avoid safety issues. NOTE: When common vent is selected, there will be a safety shutdown if one of the units loses power, or if there is an error with fan and or control board.

  • Page 61: Error Tree Analysis

    5. Cascade Transition – Down Transition Transition Over Capacity The control valve reduces the flow when the load is over 80% of the total capacity. 5 to MAX 100% 100% 100% 100% 100% Table 32 – Cascade Down Transition - ! Four units split the previous load in fourth, # Three units split the previous load in third, @ Two units split the previous load in half, *The last unit takes the previous load NOTE: If the amount of heat needed to reach 20 –...

  • Page 62: Air Pressure Switch

    2. AIR PRESSURE SWITCH Figure 52 – Air Pressure Switch Analysis Tree 3. Inlet / DHW / Operating Temperature SENSORS Figure 53 – Inlet / DHW / Operating Temperature Sensors Error Analysis Tree WHL-004 REV. 5.26.17...

  • Page 63: Part 11 - Final Installation Checklist

    PART 11 – FINAL INSTALLATION CHECKLIST Is there enough space to ensure proper installation? Does installation location allow for proper service clearances? BEFORE Are water and gas lines properly sized and set at proper pressures for the installation? INSTALLING Is water heater location as near the exhaust vent / intake pipe terminations as possible? Have combustible materials been cleared from the installation location? Is there a drain close to the water heater? Does water heater loop piping meet the minimum sizing requirements listed?
  • Page 64 Figure 54 – Flame Sight Glass DHW Inlet Temperature Sensor DHW Outlet Temperature Sensor (7850P-015) (7850P-019) Exhaust Temperature Sensor HX (OP) Temperature Sensor (7850P-070) (7850P-081) Temperature (◦F) Resistance (Ω) Temperature (◦F) Resistance (Ω) 62162 28409 48440 22152 38045 17408 30107 13782 23998 10990...

  • Page 65: Part 12 - Troubleshooting

    PART 12 – TROUBLESHOOTING TROUBLESHOOTING CHART PROBLEM POSSIBLE CAUSES POSSIBLE REMEDIES 1. Is the plug on the power supply cord unplugged 1. Reset the plug. from the electrical outlet? 2. Reset the circuit breaker. No electrical power 2. Is electrical panel’s 10 Amp circuit breaker tripped? 3.

  • Page 66: Part 13 - Maintenance Procedures

    Ensure service switch and/or circuit breaker Turn on service switch or circuit breaker to to water heater is turned ON power water heater Troubleshoot and correct the power supply Is there 120V at the service switch to the manual switch Nothing appears on Is the ON/OFF switch inside the water Turn ON the manual power switch inside...
  • Page 67 Check the Status of the Control Panel Observe the Control Panel to ensure the water heater is powered on, and to check for any error codes. Clear any debris from the panel. Check Exhaust Vent and Intake Pipe Terminations Verify that the water heater exhaust vent and intake pipe terminations are clean and free of obstructions. Remove any debris from the exhaust vent or intake pipe openings.
  • Page 68 8. Replace the front cover of the water heater cabinet. Reconnect power supply to the water heater. 9. Press the Power button on the control panel to turn on the water heater. Check Primary and Gas Piping  Remove the water heater cover and perform a gas leak inspection following Operating Instructions, page 2, this manual. If gas odor or leak is detected, follow procedures on page 2.
  • Page 69 8. Turn on the gas valve. Turn on electrical power to the water heater and press the Power button to turn the water heater on. Flushing the Water Heater Flushing the heat exchanger is a complicated procedure that should only be performed by a qualified service technician. NOTE: Improper maintenance WILL VOID water heater warranty.

  • Page 70: Replacement Parts

    REPLACEMENT PARTS Figure 58 – 150 Model Cabinet Replacement Parts NUMBER DESCRIPTION PART NUMBER NUMBER DESCRIPTION PART NUMBER Exhaust Assembly 7850P-117 Water Leak Detector 7850P-215 Exhaust and Intake Packing 7850P-118 Power Cord 7850P-123 Air Intake Assembly 7850P-119 Air Pressure Switch 7850P-047 Water Inlet Valve Assembly 7850P-018...
  • Page 71 Figure 59 – 150 Model Heat Exchanger Replacement Parts NUMBER DESCRIPTION PART NUMBER NUMBER DESCRIPTION PART NUMBER 7850P-133 7850P-030 Burner Fixing Bracket Flame Detector Sensor Bracket Blower Connector Packing 7850P-225 Flame Detector Sensor 7850P-031 Burner Assembly 7850P-134 Exhaust Pipe Assembly (Upper) 7850P-139 Ignition Rod 7850P-008...
  • Page 72 Figure 60 – 150 Model Combustion System Replacement Parts NUMBER DESCRIPTION PART NUMBER NUMBER DESCRIPTION PART NUMBER Fan and AGM Assembly NG 7850P-150 Gas Valve Plug Bracket 7850P-157 Fan and AGM Assembly LP 7850P-151 Gas Valve Adapter -90 7850P-079 ½” Pipe Gasket (15A) 7850P-002 7855P-072 O-Ring...
  • Page 73 Figure 61 – 199 Model Cabinet Replacement Parts NUMBER DESCRIPTION PART NUMBER NUMBER DESCRIPTION PART NUMBER EXHAUST ASSY 7850P-021 AIR PRESSURE SWITCH 7850P-047 CASE 7850P-044 DISPLAY BRACKET 7850P-065 DOOR ASSY 7850P-108 DISPLAY 7850P-057 FRONT COVER 7850P-109 CONTROL (199 Models) 7850P-058 DISPLAY PANEL BRACKET 7850P-024 CONTROL BRACKET...
  • Page 74 Figure 62 – 199 Model Heat Exchanger Replacement Parts NUMBER DESCRIPTION PART NUMBER NUMBER DESCRIPTION PART NUMBER HEAT EXCHANGER ASSY 7850P-032 FLAME DETECTOR SENSOR 7850P-031 31-1 EXHAUST PIPE ASSY (UP) 7850P-033 MIXING VALVE 7850P-054 31-2 EXHAUST TEMPERATURE SENSOR 7850P-070 H/X TEMPERATURE SENSOR 7850P-081 31-3 EXHAUST GASKET 1...

  • Page 75: Limited Warranty For Residential Tankless Water Heaters

    COVERAGE A. During the first year after the original date of installation, Westinghouse warrants that it will repair or replace, at its option, any defective or malfunctioning component of the water heater with a component of equivalent size and current model. Replacement components will be warranted for ninety (90) days.
  • Page 76 NO OTHER WARRANTIES This Westinghouse Warranty gives you specific legal rights, and you may also have other rights that vary from state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages so this limitation or exclusion may not apply to you.

  • Page 77: Maintenance Report

    MAINTENANCE REPORT In unusually dirty or dusty conditions, care must be taken to keep water heater cabinet door in place at all times. Failure to do so VOIDS WARRANTY! Allowing the water heater to operate with a dirty combustion chamber will hurt operation. Failure to clean the heat exchanger as needed by the installation location could result in water heater failure, property damage, personal injury, or death.
  • Page 78 FINAL INSPECTION Check list Verify that you have completed entire check list. WARNING: FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY OR DEATH. Homeowner Review what you have done with the homeowner. TECH SIGN OFF Table 42 - *Continue annual maintenance beyond the 4 year as required.

  • Page 79: Maintenance Notes

    MAINTENANCE NOTES WHL-004 REV. 5.26.17...

  • Page 80: Customer Installation Record Form

    CUSTOMER INSTALLATION RECORD FORM The following form should be completed by the installer for you to keep as a record of the installation in case of a warranty claim. After reading the important notes at the bottom of the page, please also sign this document. Customer’s Name: Installation Address: Date of Installation:...

This manual is also suitable for:

Wgrt 199 series

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