Enviro S50 - Troubleshooting Common Issues; Problem, Cause, and Solution Guide

55
Trouble Shooting
Problem Possible Cause Solution
Diculty mounting door
frame
Curver glass not clamped
properly
• Reseat glass by fully clamping front before sides.
Door frame hooks not seating
right
• Follow the 2-stage procedure using the dierent hook
reciever steps.
The main burner does not
ignite when called for.
*Assuming pilot is lit
The gas valve may not be on. • Check that the gas control knob is in the “ON” position.
• Check burner switch is ON or in center thermostat
position. Check switch for continuity.
Thermostat is not calling for
heat.
• Adjust the thermostat several degrees below ambient
temperature.
Problem with gas valve. • Use a DC voltmeter to measure the voltage across the
TPTH and TP terminals. Main operator voltage: Open
circuit ≥ 325mV Closed circuit ≥ 100mV
• If voltage is not present, replace thermopile.
Spark will not light the
pilot after repeatedly
pressing the spark ignitor.
Defective piezo ignitor. • Check connections to ignitor.
• If ignitor connections are good but no spark, replace
ignitor. Visually check for spark
Broken or misaligned electrode. • Check for broken ceramic insulation, replace electrode if
broken.
• If spark is not arcing from electrode to pilot adjust
electrode rod distance (closer doesnt mean better).
Pilot gas not coming through. • Ensure pilot know is pushed all the way down while
pressing piezo.
• Check gas pressure at the valve ports
• Remove pilot head and check for micro debris.
Pilot will not remain lit (or
pilot wandering).
7-Day Shutdown
(Does not apply to S50-820)
• The pilot has been in operation for 7 continuous days
without main burner operation. Turn replace ON to reset
pilot timer.
Problem with thermocouple
circuit.
• Check polarity of thermopile is correct if charge time is
excessive.
• Check thermocouple voltage at valve. It must be greater
than 5 mV. If low, replace thermocouple.
• Check pilot for full ame around thermocouple. If ame
is too small, check gas pressure, adjust pilot rate screw,
check pilot head for micro debris.
•Check thermocouple connection at rear of the valve is not
loose.
Drafty rebox conditions • Ensure curved glass is properly sealed
• Ensure pilot draft shield is in place and gasket is intact.
• Ensure restrictor is set properly, may need to close some.
Burners will not remain lit. Problem with thermopile circuit. • Check gas line pressure.
• Check for healthy ame characteristics
• Check for healthy pilot ame characteristics
• Check thermopile for minimum of 300 mV when burner is
switched on.
• Check thermopile polarity is correct (821 valve)
Flame lifting Leak in vent pipe • Check for leaks in vent connections.
Trouble establishing draft • Check vent conguration with manual.
• Exhaust may be over restricted.
• Burner air supply is obstructed.
Windy outdoor conditions • Check to see if termination is on correctly.
• Ensure approved high wind termination cap is used.
• May need to install high wind guard.
Blue Flames long after
warm up
Adjust the air shutter and/or exhaust restrictor.
Flames are burning “dirty”
or sooting
Flame impingement • Check log positioning.
• Increase primary air by opening the air shutter and/or by
opening the exhaust restrictor.