Test thermocouple and thermopile
Contents
1. e eawanc SERVICE PROCEDURE RG II I seat Fes ICON Thermocouple Thermopile Testing and SAFETY SYSTEM ms System Replacement p OPEN CIRCUIT THERMOPILE TESTING Honeywell Gas Control The following test should be performed while the pilot flame is on Step 1 Turn knob to pilot position and depress Step 2 Continue pressing knob and remove red wire from resettable thermal door switch Step 3 Using a multimeter capable of measuring millivolts connect the positive side of the multimeter to the terminal of the resettable thermal door switch Connect the negative side of the multimeter to any earth ground location jacket base screw etc Resettable Thermal Door Switch Terminal Normal thermopile operation will be between 350mV 850mV If reading is less than 350mV replacement of pilot assembly 1s recommended following SER VICE PROCEDURE RG III Step 4 Ifthermopile reading is between 350mV 850mV remove multimeter and reconnect red wire to positive terminal of Gas Control Step 5 Release Gas Control knob and turn to desired setting to resume normal operation Qe BRADFORD WHITE2. http waterheatertimer org How to troubleshoot gas water heater html The Bradford White eawanc SERVICE PROCEDURE RG II EIR ICON Thermocouple Thermopile Testing and ma System Replacement CLOSED CIRCUIT THERMOCOUPLE TESTING White Rodgers Control Step 1 Closed circuit testing is the preferred method for testing thermocouple Following the lighting instruction label on the heater proceed to light the pilot and allow to operate for three minuets If the pilot will not stay lit hold the pilot button located on the combination thermostat gas valve down during this test Step 2 Using a multimeter capable of measuring millivolts connect one lead using an alligator clip to the copper sheath of the thermocouple use the second lead of the multi meter to probe the top terminal located at the back of the combination thermostat gas valve Step 3 If meter reads 10 millivolts or higher the thermocouple is OK If reading is below 10 millivolts replace the thermocouple Probe top terminal on back of combination thermostat gas valve p Alligator clip to copper sheath of thermocouple CLOSED CIRCUIT THERMOCOUPLE TESTING Robertshaw Control Step 1 Disconnect thermocouple from combination thermostat gas valve Step 2 Connect a thermocouple adaptor BWC P N 239 44642 00 Robertshaw P N 75036 at the thermocouple location in the combination thermostat gas valve Step 3 Reconnect thermocouple to adapt
3. or Make certain all connections are tight finger tight plus 1 4 turn Step 4 Using a multimeter capable of measuring millivolts connect one alligator clip to the set screw of the adaptor and the other alligator clip to copper portion of the thermocouple Step 5 Following the lighting instruction label on the heater proceed to light the pilot and allow to operate for three minuets Ifthe pilot will not stay lit hold the red reset button located on the combination thermostat gas valve down during this test Step 6 Ifmeter reads 13 millivolts or higher the thermocouple is OK If reading is below 13 millivolts replace the thermocouple 10 E BRADFORD WHITE The Bradford White catuanc SERVICE PROCEDURE RG II iR ICON Thermocouple Thermopile Testing and System Replacement OPEN CIRCUIT THERMOCOUPLE TESTING White Rodgers Robertshaw Gas Valve Step 1 Disconnect thermocouple from combination thermostat gas valve Step 2 Using a multimeter capable of measuring millivolts connect one alligator clip to the end ball or contact portion of the thermocouple and the other alligator clip to copper portion of the thermocouple Step3 Following the lighting instruction label on the heater proceed to light the pilot and allow to operate for three minutes It will be necessary to hold the pilot button down continuously throughout this test A reading of 20 to 30 millivolts indicates good thermocou
4. ple output THERMOCOUPLE REPLACEMENT White Rodgers Robertshaw Gas Valve Step 1 Turn off gas supply to water heater Rotate knob of combination thermostat gas valve to OFF position For Robertshaw Control rotate knob clockwise to the OFF position For White Rodgers Control depress knob slightly and rotate clockwise to the OFF position Step 2 Remove outer jacket door Step3 Remove right side of inner door per SERVICE PROCEDURE RG I steps 3a through 3c Step 4 Disconnect thermocouple from combination thermostat gas valve Locate other end of thermocouple inside of combustion chamber and remove from pilot bracket Pull firmly pulling away from the pilot assembly Step 5 Install new thermocouple into pilot bracket making certain the thermocouple is fully engaged into the pilot bracket Position thermocouple against left side inner door flange at its original position Connect other end of thermocouple to combination thermostat gas valve finger tight 1 4 turn Step 6 Inspect inner door gasket per SER VICE PROCEDURE RG I Step 4 Thermocouple position Step 7 Install right side inner door per SERVICE PROCEDURE RG I Step 10 through Step 13 Step 8 To resume operation follow the instructions located on the lighting instruction label or the lighting instructions located in the installation and operation manual BRADFORD WHITE See eee ee ee ee eee eee 6 The Bradford Whit
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