Residential Tankless Water Heaters Installation Start-Up Maintenance Parts Warranty WGRT**150 / WGRT**199 Models ** “NG” Denotes Natural Gas; “LP” Denotes Propane Gas This manual must only be used by a qualified installer / service technician. Read all instructions in this manual before installing. Perform steps in the given order. Failure to do so could result in substantial property damage, severe personal injury, or death.
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. WHAT TO DO IF YOU SMELL GAS • 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.
Foreword For the Installer This manual is intended to be used in conjunction with other literature provided with the water heater. This includes all related control information. It is important that this manual, all other documents included in this system, and additional publications including the Code for the Installation of Heat Producing Appliances and National Fuel Gas Code - ANSI Z223.1 (latest versions), be reviewed in their entirety before beginning any work.
Table of Contents Part 1 - General Safety Information A. Operation and Installation Warnings B. Improper Combustion C. Gas D. When Servicing the Water Heating System E. Water Chemistry Requirements F. Freeze Protection G. Water Temperature Adjustment and Scalding H. High Elevation Installations Part 2 - Before You Start A. What’s in the Box B. Optional Equipment Part 3 - Prepare the Water Heater Installation A. Locating the Water Heater B. Leveling C. Clearances for Service Access D.
Improper venting can cause a build-up of carbon monoxide. Breathing carbon monoxide can result in brain damage or death. DO NOT operate the water heater unless it is properly vented to the outside and has an adequate fresh air supply for safe operation. Inspect the exterior exhaust gas outlet port and fresh air inlet port on a regular basis to ensure they are functioning properly. A concentration of carbon monoxide as small as .04% (400 parts per million) in the air can be fatal.
This water heater has been designed to heat potable water ONLY. Using this water heater to heat non-potable fluid WILL VOID product warranty, and could result in property damage, personal injury, or death. Do not use this water heater for anything other than its intended purpose (as described in this manual). Doing so could result in property damage and WILL VOID product warranty. B. Improper Combustion Do not obstruct the flow of combustion and ventilating air.
G. Water Temperature Adjustment and Scalding This water heater can deliver scalding water. Be careful whenever using hot water to avoid scalding injury. Certain appliances such as dishwashers and automatic clothes washers may require increased water temperatures. By setting the thermostat on this heater to obtain the increased water temperature required by these appliances you may create the potential for scald injury. H.
Part 2 - Before You Start Open the shipping crate of the water heater. UNCRATING THE WATER HEATER - Any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee. A.
Part 3 - Prepare the Water Heater Installation Remove all sides of the shipping crate to allow the heater to be moved into its installation location. COLD WEATHER HANDLING - If the water heater has been stored in a very cold location (BELOW 0oF) before installation, handle with care until the components come to room temperature. Failure to do so could result in damage to the water heater. Carefully consider installation when determining heater location.
B. Leveling D. Residential Garage and Closet Installations In order for the condensate to properly flow out of the collection system, the area where you locate the heater must be level. Location must also fully support the weight of the filled water heater. C. Clearances for Service Access Check with your local Authority Having Jurisdiction for requirements when installing the water heater in a garage or closet. Please read the entire manual before attempting installation.
Different vent terminals can be used to simplify and eliminate multiple penetrations in the building structure (see Optional Equipment in Venting Section). The exhaust vent and intake piping lengths, routing, and termination methods must all comply with the methods and limits given in the Venting Section, this manual. When installing a combustion air intake from outdoors, care must be taken to utilize uncontaminated combustion air. To prevent combustion air contamination, see Table 7.
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 Auto body shops Paint or varnish removers Plastic manufacturing pl
I. Technical Specifications Model 150 199 Installation Indoor, Wall Hung, Fully Condensing Minimum / Maximum Input (Btu/Hr) Hot Water Capacity 15,000 / 150,000 19,900 / 199,000 35oF Rise 8.1 GPM 11 GPM 45oF Rise 6.3 GPM 8.5 GPM 77oF Rise 3.7 GPM 5 GPM Flue System Category IV, Sealed Combustion Direct Vent, Power Vent Vent Run 2” (50 feet), 3” (100 feet), Schedule 40 PVC, CPVC, PP Weight (lbs) 64 88 Energy Factor (EF) 0.95 0.98 Uniform Energy Factor (UEF) 0.93 0.
Figure 2 - 150 Model Dimensions Description Diameter A Exhaust Outlet Adapter 2” B Air Intake Adapter 2” C Gas Inlet Adapter 3/4” NPT D DHW Outlet Adapter 3/4” NPT E DHW Inlet Adapter 3/4” NPT F Condensate Adapter 1/2” NPT G DHW Inlet Filter N/A Table 9 - 150 Model Adapter Specifications How the Water Heater Operates Condensing technology intelligently delivers water heating while maximizing efficiency.
Figure 3 - 150 Model Components Number Component Description Number Component Description Number Component Description 1 Exhaust Vent Adapter 10 Mixing Valve 19 Secondary Heat Exchanger Assembly 2 Air Inlet Pipe 11 DHW Outlet Adapter 20 Gas Valve 3 Ignition Transformer 12 Condensate Trap 21 Burner Case 4 Igniter 13 Gas Inlet Adapter 22 AGM (Air Gas Mixer) 5 Flame Detection Sensor 14 Cold Water Inlet 23 BLDC Fan 6 Hot Water Outlet 15 Water Adjustment Valve 24 Air I
Figure 4 - 199 Model Dimensions Description Diameter A Exhaust Outlet Adapter 3” B Air Intake Adapter 3” C Gas Inlet Adapter 3/4” NPT D DHW Outlet Adapter 3/4” NPT E DHW Inlet Adapter 3/4” NPT F Condensate Adapter 1/2” NPT G DHW Inlet Filter N/A Table 11 - 199 Model Adapter Specifications Field Wiring and Power Switch – Each water heater is supplied with a power switch to cut off power. The water heater is also equipped with two front mounted terminal strips.
Figure 5 - 199 Model Components Number Component Description Number Component Description Number Component Description 1 Exhaust Vent Adapter 13 Water Adjustment Valve 25 Freeze Protector 2 Air Inlet Pipe 14 Main Controller 26 DHW Outlet Adapter Secondary Heat Exchanger Assembly 27 Condensate Trap 3 AGM (Air Gas Mixer) 15 4 Ignition Transformer 16 Gas Inlet Pipe 1 28 Cold Water Inlet Adapter 5 Igniter 17 Flame Sight Glass 29 Cold Water Inlet Filter 6 Flame Detection
Positioning the Water Heater on the Wall 1. Attach the wall bracket on the location where you want to install the water heater. Ensure it is level and on stud (16” centers) before proceeding. 2. Mark the four drill holes with a pencil or marker. Remove the wall bracket. 3. Drill four (4) holes using a 5/32 drill bit at the marked hole locations. 4. Mount the wall bracket to the wall with the four (4) included anchor bolts. Ensure the mounted bracket is level. See Figure 6A. 5.
2. The expansion tank must be located as shown in Applications, this manual, or following recognized design methods. See expansion tank manufacturer’s instructions for details. D. Piping the Water Heater Use at least the MINIMUM pipe size for all water heater loop piping This is to avoid the possibility of inadequate flow through the water heater. Using less than the required minimum pipe size and piping could result in system problems, property damage, and premature water heater failure.
Figure 8 - DHW Piping, Single Water Heater Figure 9 - DHW Piping, Single Water Heater with Recirculation Figure 10 - DHW Piping with Storage Tank Figure 11 - DHW Piping with Storage Tank and Recirculation 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. 3.
Figure 12 - Cascaded Water Heaters Figure 13 - Cascade Water Heaters with Recirculation 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. 3. All circulators should have an integral flow check. 4.
Figure 14 - Cascaded Water Heaters with Storage Tank Figure 15 - Cascaded Water Heaters with Storage Tank and Recirculation 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. 3. All circulators should have an integral flow check. 4.
Figure 16 - 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. 3. All circulators should have an integral flow check. 4.
F. Circulator Sizing Figure 17 - Pressure Drop through the Heat Exchanger ∆T = 77oF Number of Units ∆T = 45oF ∆T = 35oF Flow Rate (GPM) Water Velocity (ft/s) Pipe Dia. (In.) Flow Rate (GPM) Water Velocity (ft/s) Pipe Dia. (In.) Flow Rate (GPM) Water Velocity (ft/s) Pipe Dia. (In.) 1 5 3.75 3/4 9 3.61 1 11 4.64 1 2 10 4.22 1 18 3.21 23 4.13 1 1/2 3 16 4.05 1 1/4 27 4.82 34 3.48 4 21 3.75 35 3.61 45 4.64 5 26 4.69 44 4.52 57 3.72 6 31 3.17 53 3.
required. DO NOT operate this water heater before the supplied pressure relief valve is installed with sufficient relieving capacity in accordance with the rating plate on the water heater. Pressure relief valves must be installed as close to the water heater as possible. No other valves should be placed between the pressure relief valve and the appliance. DO NOT install a relief valve with a pressure rating greater than 150 psi. This is the maximum allowable relief valve setting for this water heater.
1. Installation should be made in accordance with the regulations of the Authority Having Jurisdiction, local code authorities, and utility companies which pertain to this type of water heating equipment. 2. Install the venting system in accordance with these instructions and with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, CAN/ CGA B149, and / or applicable provisions of local building codes. 3.
DO NOT mix components from different venting systems. The vent system could fail, causing leakage of flue products into the living space. Use only the approved pipe and fitting materials, and primer and cement specifically designed for the material used, as listed in the above table. Failure to do so could result in property damage, serious injury, or death. • DO NOT insulate the first three (3) linear feet of the exhaust vent run.
D. Exhaust Vent and Intake Pipe Location INSIDE CORNER DETAIL G E A H E B B E OPERABLE C FIXED CLOSED FIXED CLOSED D E E I E OPERABLE F M I B E E K E I E B J A K I B L LP-179-CC 03/28/17 E Exhaust Vent Terminal I Intake Pipe Terminal Area Where Intake Terminal Is Not Permitted Figure 19 - Exit Terminals for Direct Vent Systems - ANSI Z223.1 / NFPA 54 for US and CAN/CSA B149.
E. Exhaust Vent and Intake Pipe Sizing 1. The exhaust vent and intake pipe size is 2” for 150 models, and 3” for 199 models. 2. The total equivalent length of 2” exhaust vent and intake pipe should not exceed fifty (50) feet; 3” exhaust vent and intake pipe should not exceed one hundred (100) feet. a. The equivalent length of elbows, tees, and other fittings are listed in the Friction Loss Table. b.
minimum of 4 foot intervals to prevent sagging of the pipe where condensate may form. 13. Do not use the heater to support any piping. 14. A screened straight coupling is provided with the heater for use as an outside exhaust termination. 15. A screened inlet air tee is provided with the heater to be used as an outside intake termination. 16.
Two Pipe Sidewall Venting with Elbow (Intake) and Coupling (Exhaust) EXTERIOR WALL Two Pipe Roof Venting with Elbow (Intake) and Coupling (Exhaust) 1" MIN. 12" MIN.
EXHAUST A AIR INTAKE B FRONT VIEW 24.00 C Exhaust D EXHAUST Intake E AIR INTAKE LP-325-PP 03/31/11 SIDE VIEW F LP-325-OO 02/04/15 Figure 24 - Horizontal (Snorkel) Venting NOTES: A. For every 1” of overhang, the exhaust vent must be located 1” vertical below overhang (overhang means top of building structure and not two adjacent walls [corner of building]). B. Typical installations require 12” minimum separation between bottom of exhaust outlet and top of air intake. C.
2. Venting Through an Existing System This heater may be vented through an existing unused vent system. The inner diameter of the existing vent system is utilized for the combustion air source. Two methods have been approved for such venting: Concentric Venting Through an Existing System and Venting as a Chase. concentric vent kits. Concentric venting through an existing system must run vertically through the roof. See Table 19 for proper minimum vent sizing.
3. Power Venting, Indoor Combustion Air in Confined or Unconfined Space This heater requires fresh, uncontaminated air for safe operation considered part of the space. and must be installed in a mechanical room where there is adequate Confined space is space with volume less than 50 cubic feet per combustion and ventilating air. NOTE: To prevent combustion air 1,000 Btu/hour (4.8 cubic meters per kW) of the total input rating of contamination, see Table 7.
I. 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 units must be direct vented, with an exhaust vent and intake air pipe vented to the outdoors. DO NOT power vent Common Vented units! Doing so will result in property damage, severe personal injury, or death. These units can be common vented.
2. Recommended Exhaust Pipe Transitions Figure 29 - Recommended Exhaust Pipe Transitions 3. Two (2) Pipe Common Direct Vent Systems DO NOT ATTEMPT to common vent 150 model water heaters! Doing so will result in property damage, severe personal injury, or death. Common Vented units must be direct vented, with an exhaust vent and intake air pipe vented to the outdoors. DO NOT power vent Common Vented units! Doing so will result in property damage, severe personal injury, or death.
Figure 30 - Common Vented Units – Unbalanced Venting Figure 31 - Common Vented Units – Roof Venting All vent pipes must be glued, properly supported, and the exhaust pitched a minimum of 1/4” per foot back to the heater to allow drainage of condensate. When placing support brackets on vent piping, the first bracket must be within 1 foot of the water heater and the balance of 4 foot intervals on the vent pipe.
Part 6 - Installing the Condensate Drain This condensing high efficiency water heater has a condensate removal system. Condensate is water vapor derived from combustion products, similar to that produced by an automobile when it is initially started. It is very important that the condensate line is sloped down away from the heater and to a suitable drain. The condensate line must remain unobstructed.
Part 7 - Connecting Electrical Service Install wiring and electrically ground water heater in accordance with the authority having jurisdiction or, in the absence of such an authority, follow the National Electrical Code, NFPA 70, and/or CSA C22.1 Electrical Code-Part 1 in Canada.
C. Wiring a Cascaded System When wiring the water heater for Cascade operation, select one as the Master water heater. The remaining water heaters will be designated Followers. See “Setting Up a Cascade System” for more details. 1. Connect the five pin connectors of the cascade communication cables to the control board of every unit. See Figures 35 and 36. 2.
Figure 39 - 150 Model Electrical Wiring Diagram whl-004 Rev. 000 Rel. 013 Date 5.1.
Figure 40 - 150 Model Ladder Diagram whl-004 Rev. 000 Rel. 013 Date 5.1.
Figure 41 - 199 Model Electrical Wiring Diagram whl-004 Rev. 000 Rel. 013 Date 5.1.
Figure 42 - 199 Model Ladder Diagram whl-004 Rev. 000 Rel. 013 Date 5.1.
Connector No.
Connector No. of Location Pin 1 8 2 9 3 10 CN7 LWD1140-14 4 11 5 12 6 13 7 14 Board Silk F.S Flame Sensor OP.S Outlet Operating Water Temperature Sensor DH.S DHW Temperature Sensor I.S Inlet Water Temperature Sensor BG.S Exhaust Temperature Sensor ST.S UNUSED SP.
Part 8 - Gas Connections FIRE AND/OR EXPLOSION HAZARD To avoid serious injury or death, the gas line installation and the gas line inlet pressure test must be done by a licensed professional. Ensure the gas on which the water heater will operate is the same type specified on the rating plate (natural gas or LP gas). This water heater must be converted into propane operation unless specifically manufactured for use with propane. Follow Gas Conversion Manual instructions (separate document).
combustion values. Repeat this procedure until the values obtained on the calibrated combustion analyzer agree with those stated in Table If an excess flow valve (EFV) is in the gas line, check the manufacturer’s 27. 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 44.
Part 9 - Controls A. Control and Display Overviews Figure 47 - Control Panel Detail Figure 48 - LCD Display LCD also features a backlit lamp that will illuminate: • When a user action is detected (a button is pressed) • The display has timed out for approximately 2 minutes After start-up, the display appears as follows. B. Start-Up Sequence After the appliance is powered ON, the LCD display shows a sequence of information.
C. Changing the DHW Set-Point D. Changing the Temperature Indicator NOTE: The setpoint cannot be changed if water is flowing through the To change the temperature indicator from Fahrenheit to Celsius, unit. Ensure there is no demand on the water heater when changing press and hold the button for more than five (5) seconds when the setpoint. the display panel is powered ON. This will toggle the temperature The display shows the icon when the DHW set-point can be unit indicated on the display. changed.
E. Status Display Status Display will activate when button is pressed and held for five seconds at Standby Mode.
F. Installer Mode Installer Mode will activate when button is pressed and held for five seconds while the water heater display is powered Off. Figure 52 - Installer Mode Screens Display Default Detail Description 1:EH E0.00 Error history up to 10 Check ten most recent Error Codes (H0 - H9) 2:cE OFF Clear Error History Select “ON” to Clear Error History.
G. Setting Up a Cascaded System • The Master appliance rotates after a cumulative combustion of 10 hours Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 A maximum of eighteen (18) 199 models may be installed in a cascaded system. A maximum of four (4) 150 models may be installed in a cascaded system. Installing more than the maximum amount of water heaters in a cascaded system will result in system problems, property damage, and premature water heater failure.
Part 10 - Troubleshooting A. Error Code When the water heater encounters an error, the display will flash “Er” followed by a numerical code. The water heater shall enter a soft lockout condition if the error is such that it can return to normal operation once the condition relieves itself (overheat conditions, NTC open or shorts, etc.). The water heater shall enter a hard lockout if the condition indicates something more serious (flame, ignition, condensate line, etc.
Error Code Error Code Description Er:32 Water Outlet Sensor Open or Short Possible Remedies This Error Code will go away when outlet water temperature decreases. If Error happens again: 1. Check DHW outlet temperature sensor. Ensure connections are secure. 2. Check sensor resistance. If resistance is zero, replace the sensor. 3. If the problem persists, replace the main control. H/X Temperature Sensor Open or Short This Error Code will go away when outlet water temperature decreases.
Error Code Error Code Description Possible Remedies Er:67 AGM Error Press the Power button to clear the Error Code. If Error happens again: 1. Turn power OFF and ON at the main power switch internal to the water heater. 2. Ensure fan inlet hole is completely open after turning the power OFF and ON. 3. Check wiring connections to the AGM. Ensure all are secure. 4. Check AGM operation. 5. Replace AGM components. 6. If the problem persists, replace the main control.
B. Error Tree Analysis 1. Flame Detection Figure 54 - Flame Detection Error Analysis Tree 2. Air Pressure Switch Detection Figure 55 - Air Pressure Switch Analysis Tree whl-004 Rev. 000 Rel. 013 Date 5.1.
3. Inlet / DHW / Operating Temperature / Exhaust Sensors Figure 56 - Inlet / DHW / Operating Temperature Sensors Error Analysis Tree C. Suggested Corrective Actions Problem Possible Causes Possible Remedies No electrical power to the water heater 1. Is the plug on the power supply cord unplugged from the electrical outlet? 2. Is electrical panel’s 10 Amp circuit breaker tripped? 3. Is the fuse on the circuit board good? 4. Is there a power outage to the home? 1. Reset the plug. 2.
DIAGNOSTICS AND SUGGESTED CORRECTIVE ACTIONS The water heater control is able to record information about the water heater’s condition at the time of the ten previous faults or errors. This information is available to view in the Installer Mode under the History screen. The following screens may be displayed when reviewing the water heater history. The table below also includes diagnostic information and possible corrective actions.
DHW Inlet Temperature Sensor (7850P-015) Exhaust Temperature Sensor (7850P-070) DHW Outlet Temperature Sensor (7850P-019) HX (OP) Temperature Sensor (7850P-081) Temperature (oF) Resistance (Ω) Temperature (oF) Resistance (Ω) -4 62162 -4 28409 5 48440 5 22152 14 38045 14 17408 23 30107 23 13782 32 23998 32 10990 41 19261 41 8824 50 15562 50 7131 59 12655 59 5800 68 10353 68 4747 77 8520 77 3906 86 7051 86 3233 95 5867 95 2690 104 4908 104 2250 113
Install Exhaust Vent and Intake Piping Yes No Yes No Yes No Yes No Yes No Yes No Yes No Have venting lengths been minimized? Are terminations properly spaced from windows, doors, and other intake vents? Have all vent terminations been installed at least one foot above exterior grade and one foot above normal snow accumulation level? Is vent piping properly supported? Has vent piping been checked for leaks? Has the exhaust vent line been pitched back to the water heater at a rate of 1/4” pe
Part 12 - Maintenance The water heater must be inspected and serviced annually, preferably at the start of the heating season, by a qualified installer / service technician. In addition, the maintenance and care of the water heater as outlined in this manual must be performed by the user/owner to assure maximum efficiency and reliability. Follow the maintenance procedures given throughout this manual.
7. Dry the filter completely. Then reinsert the filter into the plastic assembly. 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 Figure 59 - Draining the Water Heater; Cleaning the Filter 6. Reinstall the cold water inlet filter. manual.
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. Such product failures ARE NOT covered under warranty.
INSPECTION ACTIVITIES DATE LAST COMPLETED PIPING 1st YEAR Near water heater piping Check water heater and system piping for any sign of leakage. Leaking pipes could cause property damage. Make sure all piping is properly supported. Flush tankless heat exchanger annually (more in hard water conditions). See User’s Information manual for instructions. Vent Check condition of all vent pipes and joints. Ensure all vent piping is properly supported.
Part 13 - Replacement Parts Figure 61 - 150 Model Cabinet Replacement Parts NUMBER DESCRIPTION DESCRIPTION PART NUMBER 1 Exhaust Assembly PART NUMBER NUMBER 7850P-117 10 Water Leak Detector 7850P-215 2 Exhaust and Intake Packing 7850P-118 11 Power Cord 7850P-123 3 Air Intake Assembly 7850P-119 12 Air Pressure Switch 7850P-047 4 Water Inlet Valve Assembly 7850P-018 13 Gas Inlet Connection 7850P-043 4-1 Cold Water Temperature Sensor 7850P-015 14 Control Board Bracket 785
Figure 62 - 150 Model Heat Exchanger Replacement Parts NUMBER DESCRIPTION DESCRIPTION PART NUMBER 1 Burner Fixing Bracket 7850P-133 4-6 Flame Detector Sensor Bracket 7850P-030 2 Blower Connector Packing 7850P-225 3 Burner Assembly 7850P-134 4-7 Flame Detector Sensor 7850P-031 4-8 Exhaust Pipe Assembly (Upper) 7850P-139 3-1 Ignition Rod 7850P-008 4-9 Flame Glass Kit 7850P-144 3-2 3-3 Ignition Rod Gasket 7850P-010 4-10 Sight Glass Kit 7850P-145 Overheat Switch (Burner)
Figure 63 - 150 Model Combustion System Replacement Parts NUMBER DESCRIPTION PART NUMBER Fan and AGM Assembly NG 7850P-150 2-2 Gas Valve Plug Bracket 7850P-157 Fan and AGM Assembly LP 7850P-151 2-3 Gas Valve Adapter -90 7850P-079 1-1 Fan 7850P-002 3 1/2” Pipe Gasket (15A) 7855P-072 1-2 O-Ring 7850P-003 4 15A Packing (Non-Asbestos) 7855P-221 1-3 N/A N/A 5 Gas Mixer Bracket 7850P-242 6 Gas Valve Bracket 7850P-158 1-4 AGM (Actuator) 7850P-152 7 Silencer Elbow 7850P-1
Figure 64 - 199 Model Cabinet Replacement Parts NUMBER DESCRIPTION PART NUMBER NUMBER DESCRIPTION PART NUMBER 1 Exhaust Assembly 7850P-021 2 Case 7850P-044 11 Air Pressure Switch 7850P-047 12 Display Bracket 7850P-065 3 Door Assembly 7850P-025 13 Display 7850P-057 3-1 Front Cover 7850P-062 14 PCB (Control Board) 7850P-058 3-2 Display Panel Bracket 7850P-024 15 Control Board Bracket 7850P-066 3-3 Display Panel 7850P-023 16 Rocker Switch 7850P-059 4 Ignition Tran
Figure 65 - 199 Model Heat Exchanger Replacement Parts NUMBER DESCRIPTION PART NUMBER NUMBER DESCRIPTION PART NUMBER 31 Heat Exchanger Assembly 7850P-032 36 Flame Detector Sensor 7850P-031 31-1 Exhaust Pipe Assembly (Upper) 7850P-033 31-2 Exhaust Temperature Sensor 7850P-070 37 Mixing Valve 7850P-054 38 HX Temperature Sensor 7850P-081 31-3 Exhaust Gasket 1 7850P-071 39 HX Overheat Switch 7850P-051 31-4 Exhaust Pipe Assembly (Down) w/ Condensate Collector Pan 7850P-034 40
Limited Warranty for Tankless Water Heaters Westinghouse warrants this instantaneous water heater and its components to be free from defects in material and workmanship according to the following terms, conditions, and time periods. UNLESS OTHERWISE NOTED THESE WARRANTIES COMMENCE ON THE DATE OF INSTALLATION. This limited warranty is only available to the original consumer purchaser (herinafter “Owner”) of this water heater, and is non-transferable.
or partially empty water heater (“dry firing”), or failures caused by operating the water heater when it is not supplied with water, free to circulate at all times. 16. Any damage or failure of the water heater due to the accumulation of solid materials or lime deposits. 17. Any damage or failure resulting from improper water chemistry, or heating anything other than potable water.
Notes whl-004 Rev. 000 Rel. 013 Date 5.1.
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.