Desa DVF32TMHST installation instructions Observed Problem, Possible Cause, Corrective Action

Models: DVF32TMHST

1 21
Download 21 pages 26.18 Kb
Page 17
Image 17

OBSERVED PROBLEM

POSSIBLE CAUSE

CORRECTIVE ACTION

Pilot will not stay lit after carefully following lighting instructions.

Pilot lit but no flame on the burner.

Frequent pilot outage problem.

Defective pilot generator (thermocouple).

Remote or wires defective.

Thermopile/Thermocouple not generating sufficient millivoltage.

Plugged burner orifice.

Thermocouple not generating sufficient millivoltage.

Pilot flame maybe too low or blowing (high) causing the valve safety to drop out.

Check pilot flame. It must impinge on thermocouple.

Clean or adjust pilot for maximum flame impingement on thermocouple.

Ensure that the connection between the valve and thermocouple are tight and secured.

Check remote wires for proper connections. Jumper wire across terminals at remote control, if burner comes on, replace defective remote. If okay, jumper wire across remote control at valve, if burner comes on, wires are faulty or connections are bad.

Check thermopile with millivolt meter. Take reading at thermopile terminals of gas valve. Should read 325 millivolts minimum with remote control off. Replace thermopile if reading is below specified minimum.

Check burner orifice for stoppage and remove.

Check thermocouple with millivolt meter. Take reading at thermocouple terminals of gas valve. Should read 18 millivolts minimum with remote control off. Replace faulty thermocouple if reading is below specified minimum.

Clean and/or adjust pilot flame for maximum flame impingement on thermocouple.

- 16 -

For more information, visit www.desatech.com

Page 17
Image 17
Desa DVF32TMHST installation instructions Observed Problem, Possible Cause, Corrective Action