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FOR INSTALLERS AND SERVICE TECHNICIANS ONLY
GAS
FIREPLACE
SERVICE
MANUAL
Sherwood Industries Ltd. Duplication of this document is prohibited. All rights reserved.
August 2003 C-10100
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This is a service guide designed by SHERWOOD INDUSTRIES LTD. We hope this manual will assist you to identify and correct operational concerns you might experience in all ENVIROGAS appliances. This service guide is designed for TRAINED SERVICE TECHNICIANS AND INSTALLERS. This guide is NOT to be used by the homeowner. If after reading this guide and following our recommendations and the problem still excists, please do-not hesitate to call our technical department. Technical Division
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1(PILOT WILL NOT LIGHT NO SPARK A) IGNITION SYSTEM Make sure that wires are not broken, frayed and that all Replace with only connections are tight at both manufactures parts the piezo ignitor and electrode. Make sure that ceramic on the IF IT DOES, replace electrode is not broken. electrode. Carefully try to spin the porcelain. Make sure a 1/8” (3.175mm) gap is maintained between Replace electrode. electrode and pilot hood. SEE PAGE 2 FIGURE 1. Retighten hex nut on back
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3.175mm Sherwood Industries Ltd. ENVIRO PAGE 2
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B) PIEZO IGNITOR OK BUT PILOT WILL STILL NOT LIGHT Correct if necessary, test Make sure all gas lines have been connected with no for gas leaks in an leaks. approved manner. Make sure that the gas is “ON” (NG) Natural gas and Correct if necessary. (LP) Propane tanks are full. Make sure the appliance Turn service valve to the service valve is in the “ON” “ON” position. position. SEE PAGE 4 FIGURE 3. Test to make sure there is no Use a match to see if air or air in the gas line.
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EXPLODED VIEW S.I.T PILOT ASSEMBLY To remove pilot injector: Remove the two screws that hold the pilot assembly to the burner control assembly. Lift the assembly straight up being careful not to damage any PILOT HEAD components. Using a 10 mm wrench undo the securing nut on pilot tubing and pull tubing down to access injector. THERMOPILE Being careful not to damage the ceramic spark electrode. PILOT INJECTOR Replace the injector and reinstall SPARK ELECTRODE
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3.5” wc BELOW 0 NO PRESSURE 1.75” wc BELOW 0 3.5” wc ABOVE 0 1.75” wc ABOVE 0 INLET GAS PRESSURE OUTLET GAS PRESSURE 7” wc (NG) NATURAL 3.5 “ wc (NG) NATURAL GAS GAS SUPPLY PRESSURES NATURAL GAS PROPANE GAS 50% TURN DOWN MAX SUPPLY PRESSURE 7” wc 12” wc MIN SUPPLY PRESSURE 5” wc 11.5” wc 33% TURN DOWN MAX SUPPLY PRESSURE 7” wc 13” wc MIN SUPPLY PRESSURE 4.5” wc 10.5” wc Sherwood Industries Ltd. ENVIRO PAGE 5
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CHECKING THERMOPILE FOR PROPER VOLTAGE Place the leads of the multimeter on the TP/TH and TP terminals on the valve as shown. 190 mv DC With the switch in the “ON” position, the readings should be approximately 190mV DC (this an average reading) or greater for proper Thermopile operation. The main burners may not come ON if the readings are less than 145mV DC. If a thermostat has been installed. Place the ON/OFF/THERMO switch in the THERMO position; place the leads of the multimeter on
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2) PILOT WILL NOT STAY LIT Use a manometer on the inlet Make sure the gas pressure is side of the valve to measure correct for type of fuel you are gas pressure. Adjust inlet using. pressure or contact your gas SEE PAGE 5 FIGURE 7. supplier. Thermocouple should be the same height as the pilot hood. Make sure pilot flame is engulfing the top 3/8” of the Adjust pilot as required. thermocouple. SEE PAGE 2 FIGURE 2. Check for clogged pilot injector. Make sure thermocouple Therm
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S.I.T EUROSIT MODULATING 630 SERIES Sherwood Industries Ltd. ENVIRO PAGE 8
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3) MAIN BURNERS WILL NOT LIGHT Make sure gas valve knob is Correct if necessary. in the “ON” position. Turn valve to the “ON” SEE PAGE 8 FIGURE 6. position. Make sure that the “ON-OFF THERMO” switch is in the Turn switch “ON”. “ON” position. Make sure that the thermostat is “NOT” in the Turn thermostat “UP”. lowest position. Replace damaged wires as Make sure that all control necessary. Gently squeeze wires are not damaged, connectors with a pair of broken or frayed and that a
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MAIN BURNERS WILL NOT LIGHT CON’T. Bypass spill switch with a Check spill switch operation jumper wire as shown. If the on B-vented models only unit starts, replace the spill SEE PAGE 10 FIGURE 9. switch. DO NOT LEAVE BY PASSED IN. Check the “ON-OFF” switch Use a jumper wire. If the unit and thermostat for proper starts, replace switch if operation. necessary. Make sure that the main Remove the top tray. burner orifices are not Remove orifice and clean. clogged or damaged. Repla
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4) MAIN BURNERS WILL NOT STAY LIT Adjust pilot if necessary. Make sure pilot flame engulfs the thermopile and does Check outlet gas pressure. “NOT” have a yellow luminous flame. SEE PAGE 4 FIGURE 4. Check for clogged pilot injector or blocked air inlet. Using a multimeter check Make sure millivolt readings thermopile. If not constant from thermopile are constant. replace thermopile. Make sure all wiring is not Correct if necessary. damaged or broken and all connections are tigh
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Sherwood Industries Ltd. ENVIRO PAGE 12
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SAMPLE DIRECT VENT CHIMNEY INSTALLATIONS ALL MODELS Sherwood Industries Ltd. ENVIRO PAGE 13
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SAMPLE B-VENTED CHIMNEY INSTALLATIONS ALL MODELS INSERT MODELS MUST BE FULLY LINED AND SEALED Sherwood Industries Ltd. ENVIRO PAGE 14
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5) SOOTING Make sure log placement is Correct to manufactures in the correct location. specifications. Correct if necessary. Make sure there is sufficient Outside air supply may be air supply. required on B-vented models. Check air shutter on the Increase primary air. venturi tube for proper primary air adjustment. Open air shutter. SEE PAGE 16. Make sure orifice matches Correct if necessary. that on the rating plate. Make sure outlet (manifold) Use a manometer to check th
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IF THE AIR SHUTTER IS OPENED WIDER, THE FLAME COULD APPEAR ALMOST ALL BLUE WITH FLAME LIFTING BEING THE END RESULT IF OPENED TOO MUCH WITH THE AIR SHUTTER SET PROPERLY, THE FLAME WILL SIT ON THE BURNER PORT AND THE FLAME PATTERN WILL START AT THE BOTTOM WITH A BLUE FLAME THEN TURNING TO A WHITE ALMOST YELLOW FLAME WITH A SLIGHT ORANGE EDGE AS THE AIR SHUTTER IS CLOSED, THE FLAME COULD APPEAR TALLER WITH A VERY LAZY BLACK ORANGE TIPPED FLAME PRODUCING CARBON (SOOT) Sher
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6) FLAME LIFTING A) B-VENTED MODELS Adjust air shutter, by Check air shutter on the closing shutter. burner tube (venturi). DO NOT GO TOO FAR OR THE UNIT WILL SOOT. Make sure there are no Seal venting if necessary. leaks in the venting system. Improper venting Correct if necessary. configuration. Make sure that manifold Use a manometer to check (outlet). gas pressure. Pressure is correct. SEE PAGE 5 FIGURE 7. Sherwood Industries Ltd. ENVIRO PAGE 17
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B) DIRECT VENT MODELS Check air shutter on the Adjust air shutter. burner tube (venturi). Close until flame sits onto the burner ports. Seal exhaust tube with high temperature silicone. Make sure there are no leaks Also make sure that in the venting system. combustion air pipe is sealed. Make sure the unit is not Check flue for blockage or recirculating flue products. high wind situations. Use a manometer to check gas outlet (manifold) Make sure the gas pressure pressure. is c
