Bradford White LG2PDV50H60N Service Manual
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Bradford White LG2PDV50H60N Service Manual

Bradford White LG2PDV50H60N Service Manual

Power direct vent gas water heaters
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Manual 238 51541 00C 6/21
PDV Series
Power Direct Vent Gas Water Heaters
SERVICE
MANUAL
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
PDV Series Models:
RG2PDV40S*(N,X)
RG2PDV50S*(N,X)
RG2PDV50H*(N,X)
RG2PDV75H*(N,X)
LG2PDV50H60*(N,X)
LG2PDV75H80*(N,X)
(*) Denotes Warranty Years
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Summary of Contents for Bradford White LG2PDV50H60N

  • Page 1 PDV Series Power Direct Vent Gas Water Heaters SERVICE MANUAL Troubleshooting Guide and Instructions for Service (To be performed ONLY by qualified service providers) Models Covered by This Manual: PDV Series Models: RG2PDV40S*(N,X) RG2PDV50S*(N,X) RG2PDV50H*(N,X) RG2PDV75H*(N,X) LG2PDV50H60*(N,X) LG2PDV75H80*(N,X) (*) Denotes Warranty Years Manual 238 51541 00C 6/21 Save this manual for future reference...

  • Page 2: Table Of Contents

    The Bradford White PDV Series Powered Direct Vent Gas Water Heaters Table of Contents Page PDV Service Procedure Introduction..........................4 How to Use This Manual ......................5 Tools Required for Service......................5 Specifications ..........................6 Control Timings ......................... 9 Sequence of Operation ......................10 Troubleshooting .........................
  • Page 3 PDV Series WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, DANGER personal injury, or death. Do not store or use gasoline or other flammable, combustible, or corrosive vapors and liquids in the vicinity of this or any other appliance.

  • Page 4: Introduction

    PDV Series Introduction The new Bradford White PDV water heaters are designed to provide reliable performance with enhanced standard features. New design features include reliable spark to pilot ignition system, enhanced diagnostics, simplified servicing, significantly quiet operation, additional vent lengths, and Bradford White Defender ®...

  • Page 5: Tools Required For Service

    It is intended for this manual to be used by qualified service personnel for the primary purpose of troubleshooting and repair of the Bradford White PDV Series water heaters. Understanding the sequence of operation section of this manual will contribute greatly to troubleshooting the water heater.
  • Page 6 PDV Series Power supply Dedicated 115 VAC, 60 Hz, 15A. Minimum 1/2” NPT (schedule 40 black iron pipe recommended). Gas Supply Pipe Approved Gas Natural Gas or Propane, unit must match gas type supplied. Type 5.0” W.C. min. for Natural Gas, 11.0” W.C. min. for Propane, 14.0” W.C. maximum Gas Pressure (Natural Gas &...
  • Page 7 PDV Series Vent Tables Venting Specifications for: RG2PDV(40,50)S 2" Diameter (5.1 cm) Vent Connector Lengths # of Maximum Straight Minimum Straight Terminating Elbows Length ft. (m) Length ft. (m) Through the Wall 30 (9.1) 2 (.6) Through the Wall 25 (7.6) 2 (.6) Through the Wall 20 (6.1)
  • Page 8 PDV Series Venting Specifications for: RG2PDV(50,75)H LG2PDV(50,75)H 3" Diameter (7.6 cm) Vent Connector Lengths # of Maximum Straight Minimum Straight Terminating Elbows Length ft. (m) Length ft. (m) Through the Wall 55 (16.8) 2 (.6) Through the Wall 50 (15.2) 2 (.6) Through the Wall 45 (13.7)

  • Page 9: Control Timings

    PDV Series Control Timings Ignition State Timing Pre-purge 15 Seconds Trial for Ignition 90 Seconds Flame Stabilization Period 3 Seconds Inter-purge 15 Seconds 1.5 Seconds (2 seconds. maximum; 1 second Flame Failure Response Time minimum.) Post-purge 15 Seconds PS Fault Delay (failed open/close) Retry after 2 Minutes Soft Lockout Retry after 5 Minutes...
  • Page 10 PDV Series Power Up Sequence 1. Start Up. Upon Power up, the control runs a safe-start check with a typical start-up delay of 1-5 seconds. Flammable Vapor. To assure no outputs are energized if the “Flammable Vapor Sensor” is out of range, the control will test the “Flammable Vapor Sensor”...
  • Page 11 PDV Series Normal Heating Sequence (cont.) 7. Steady state operation. During steady state operation, the control monitors: Thermostat temperature sensor-when set point temperature is satisfied, gas valve is shut down and blower will post purge for 15 seconds. Control LED flashes a short flash once every 4 seconds (idle) status code.
  • Page 12 PDV Series Abnormal Operation (cont.) times, then 3 times twice with 3 second pause. The status self clears if the fault clears for at least 15 seconds. c. Water temperature in excess of ECO (energy cut out) limit -The gas control immediately turns off pilot &...
  • Page 13 PDV Series Abnormal Operation (cont.) 5. Flame sensing fault: a. Flame lost during run-the gas control turns off pilot and main valves, runs blower for 15 seconds (inter-purge). The gas control increments the recycle count, if the recycle count has not reached its limit (4), another trial for ignition begins.
  • Page 14 PDV Series Observe green LED indicator on Electronic gas control. Status flash codes are displayed with a three second pause before repeating. Check and repair the system as noted in the troubleshooting table below Service LED Status Control Status Probable Cause Procedure None, control Control power switch in “OFF”...
  • Page 15 PDV Series Service LED Status Control Status Probable Cause Procedure 1. Unstable pilot. Failed to light Six-one 2. Pilot tube blocked or restricted. flash, three pilot. Page 17 3. Oxidation build up on pilot electrode. second System auto 4. Wire damage to pilot assembly or bad pause resets.

  • Page 16: Burner Inspection, Cleaning & Replacement

    PDV Series Burner Inspection At periodic intervals (every 6 months) a visual inspection should be made of the pilot and main burner for proper operation and to assure no debris is accumulating. Pilot flame should be stable, some causes for an unstable pilot flame are: Water heater vent is less than the allowable vent length.

  • Page 17: Pilot Testing, Cleaning & Replacement

    PDV Series Pilot Testing and Replacement Step 1. Position gas control power switch to the “OFF” position and unplug heater from wall outlet. Step 2. Turn off gas supply to water heater. Step 3. Remove outer jacket door and inner door per service procedure XIII on page 34.

  • Page 18: Pressure Switch Testing & Replacement

    PDV Series Pressure Switch Testing WARNING 115 volt potential exposure. Use Step 1. Position power switch on gas caution to avoid personal injury. control to the “OFF” position. Step 2. Remove the three screws (Phillips screw driver) from control access cover on blower assembly and remove cover (see photo 1).
  • Page 19 PDV Series Pressure Switch Replacement WARNING Step 1. Position gas control power 115 volt potential exposure. Use switch to “OFF” position. caution to avoid personal injury. Step 2. Remove the three screws (Phillip’s screw driver) from control access cover on blower assembly and remove cover (see photo 3).

  • Page 20: Blower Testing & Replacement

    PDV Series Blower Testing WARNING 115 volt potential exposure. Use Step 1. Position gas control caution to avoid personal injury. power switch to “ON” position and adjust control to call for heat. Step 2. Remove the three screws (Phillip’s screw driver) from control access cover on blower assembly and remove cover (see photo 7).
  • Page 21 PDV Series Blower Removal Step 1. Position gas control power switch to “OFF” position and adjust control to call for heat. Step 2. Unplug blower power cord from wall outlet. Step 3. Disconnect vent system from exhaust adapter on top of blower. Step 4.

  • Page 22: Blower Temperature Switch Testing & Replacement

    PDV Series WARNING Blower Temperature Switch 115 volt potential exposure. Use Testing caution to avoid personal injury. Position the power switch on the gas control to the “OFF” position. Step 1. Remove the three screws (Phillip’s screw driver) from control access cover on blower and remove cover (see photo 14).
  • Page 23 PDV Series WARNING Blower Temperature Switch 115 volt potential exposure. Use Replacement caution to avoid personal injury. Step 1. Position gas control power switch to the “OFF” position and unplug heater from wall outlet. Step 2. Remove the three screws (Phillip’s screw driver) from the control access cover on blower and remove cover (see photo 16).

  • Page 24: Gas Control Testing & Replacement

    PDV Series ICON System Gas Control Testing & Replacement Line Pressure The Gas Control is designed for a maximum line pressure of 14.0” W.C. and a minimum line pressure of 1.0” W.C. over the water heater’s rated manifold pressure (check rating plate).
  • Page 25 PDV Series ECO (Energy Cut Out) Reset The ICON System Gas Control is designed with an ECO device that will reset. To reset the Gas Control after a status code (4), turn the Gas Control knob to the “OFF” position and wait a minimum of (5) minutes before relighting following the instructions located on the lighting instruction label or the lighting instructions located in the installation and operation manual.
  • Page 26 PDV Series Gas Control Removal From Water Heater Step 1. Position gas valve power switch to the “OFF” position and unplug heater from power supply. Step 2. Drain heater to a point below the gas control level. Step 3. Turn off gas supply to water heater and disconnect gas piping from gas control.
  • Page 27 PDV Series Reinstallation of Inner Door Assembly d. Prior to reinstallation of inner door, fully inspect for the following: -Tears -Other imperfections that will inhibit proper seal -Missing Material -Gasket adhesion to inner door -Cracks -Material left on combustion chamber (around opening) -Dirt or debris If the gasket is not affected by any of the above, gasket replacement will not be required.

  • Page 28: Flammable Vapor Sensor Testing And Replacement

    PDV Series Flammable Vapor Sensor Testing Step 1. Position power switch on gas control to the “OFF” position. Step 2. Disconnect flammable vapor sensor from gas control. Step 3. Using a multi-meter set to the ohms setting, check resistance of flammable vapor sensor.

  • Page 29: Safety Circuit Voltage Trace

    PDV Series WARNING Safety Circuit Voltage 115 volt potential exposure. Use Trace caution to avoid personal injury. NOTE: This procedure assumes a cool tank. Remove Three screws (Phillips Screw driver) from control access cover on blower and remove cover (see photo 21)

  • Page 30: 115 Vac Circuit Trace

    PDV Series 115 VAC Circuit Trace WARNING Step 1. Verify 115 VAC and proper polarity 115 volt potential exposure. Use at wall outlet. caution to avoid personal injury. With unit plugged in and control Step 2. power switch in the “ON” position verify LED status.

  • Page 31: Diptube Inspection & Replacement

    PDV Series Diptube Inspection & Replacement WARNING Water Heater components and stored water may be HOT when performing the following steps in this procedure. Take necessary precaution to prevent personal injury. Step 1. Position on/off switch of gas control valve to “OFF” position and unplug water heater from wall outlet.

  • Page 32: Anode Inspection & Replacement

    PDV Series Anode Inspection & Replacement WARNING Water Heater components and stored water may be HOT when performing the following steps in this procedure. Take necessary precaution to prevent personal injury. Position on/off switch of gas control valve to the “OFF” position and unplug water heater from Step 1.

  • Page 33: Flue Baffle/Core Inspection & Replacement

    PDV Series Flue Baffle/Core Inspection and Replacement Step 1. Position gas control power switch to the “OFF” position and unplug blower from wall outlet. Step 2. Disconnect vent system from exhaust adapter on top of blower. Step 3. Disconnect intake air piping. Step 4.

  • Page 34: Inner Door Removal, Inspection & Replacement

    PDV Series Inner Door Removal Procedure Step 1. Position gas control power switch to the “OFF” position. Step 2. Remove outer jacket burner access door. Step 3. Remove wire tie from feedline. Step 4. Remove (2) ¼” hex drive screws from right side inner door. Step 5.
  • Page 35 PDV Series Installation of Inner Door with Gasket Step 11. Clean any residual gasket residue or other debris from combustion chamber surface before installing WARNING the inner door/gasket assembly. Stripped fastener connections Step 12. Place the left side inner door into position first. may allow for seal breach of Firmly position the radiused channel of the inner inner door.
  • Page 36 PDV Series Installation of Inner Door with Gasket (cont.) Step 14. Firmly place right side inner door flange against the left side inner door flange and secure with (2) ¼” hex drive screws from step 5. DO NOT OVER TIGHTEN SCREWS. Step 15.

  • Page 37: Glossary Of Terms

    Bradford White has also developed an air intake relief device that can be installed in the air intake near the water heater temporarily enabling the water heater to operate with a frozen intake terminal. Contact Bradford White or the supplier of the water heater for information about the air intake relief device.
  • Page 38 PDV Series Blower Complete 12. Heat Trap Outlet 22. Air intake boot gasket 33. Burner Assy. Temperature Switch 13. Hot Water Outlet Anode 23. Outer Door 34. Main Burner Pressure Switch 14. Flue Baffle (except 75H) 24. Right side inner door 35.
  • Page 40 905-636-0666 Warranty bwccwarranty@bradfordwhite.com Technical Support bwcctech@bradfordwhite.com Service Parts orders@bradfordwhitecanada.com Orders ca.orders@bradfordwhite.com For U.S. and Canada field service, contact your professional installer or local Bradford White sales representative. International General Contact international@bradfordwhite.com www.bradfordwhite.com ©2022, Bradford White Corporation, USA. All rights reserved.

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