Trouble Shooting The Gas Control System
NOTE: Before troubleshooting the gas control system, be sure external gas shut off is in the “On” position.
Problem
Possible Causes
Corrective Action
Spark igniter will not light.
Defective or misaligned
Check for spark at electrode and pilot: if no spark and electrode
electrode at pilot.
wire is properly connected, replace igniter.
Defective igniter
Using a match, light pilot. If pilot lights, turn off pilot and push the
(push-button)
red button again. If pilot will not light - check gap at electrode and
pilot should be 1/8” to 1/4” to have a strong spark.
Pilot will not stay lit after carefully
Defective thermocouple
Check pilot flame. Must impinge on generator and thermocouple.
following lighting instructions.
(flame switch where applicable)
Clean and/or adjust pilot for maximum flame impingement on
generator and thermocouple. Replace thermocouple if pilot will
not hold. (Hand tight 1/8 turn on replacement)
Defective valve magnet.
Replace valve, if pilot won’t hold after the thermocouple is
replaced.
Pilot burning, no gas to burner,
Wall switch or wires
Check wall switch and wires for proper connections. Jumper wire
Valve knob “ON”, Wall
defective.
across terminals at wall switch. If burner comes on, replace
Switch “ON”
defective wall switch. If okay, jumper wires, across wall switch
wires at valve. If burner comes on, wires are faulty or connec
tions are bad.
Generator may not be
Check generator with millivolt meter. Take reading at generator
generating sufficient voltage.
terminals of gas valve. Should read 325 millivolts minimum while
holding valve knob depressed in pilot position and wall switch
“off” Replace faulty generator if reading is below specified minimum.
Plugged burner orifice.
Check burner orifice for stoppage and remove.
Defective automatic valve
Remove wall switch wires from gas valve. Install jumper wires
operator.
from top bottom terminals of gas valve. Turn valve on “ON”. If
main burner does not light, replace valve.
Frequent Pilot outage problem.
Pilot flame may be too low or
Clean and/or adjust pilot flame for maximum flame impingement
blowing (high) causing the pilot
on generator and thermocouple.
safety to drop out.
Flame lifts off burner and goes out Inner 4” liner has come off flue
Attach 4” liner to flue or termination using screws, silicone and
in less than 30 seconds
or termination, flame is starving
clamps as stated in manual.
for oxygen
Flame lifts off burner on
Improper installation of firebrick.
Be sure to position firebrick against firebox walls and be sure to
one side while the rest of
Firebrick is likely leaning.
use brick clips attached to the inner side of firebox.
the flame remains lit.
WARNING:
BEFORE DOING ANY GAS CONTROL SERVICE WORK, REMOVE THE GLASS FRONT.
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Содержание MDV31
Страница 41: ...Gas Conversion for Modulator PART C WARNING WARNING 41...
Страница 44: ...Configuration 1 Basic manual HI LO and manual ON OFF capabilities 44...
Страница 45: ...Receiver Module 584 523 521 221 1001 P221SI Receiver Module 584 523 521 221 1001 P221SI 45...
Страница 46: ...Receiver Module 584 523 521 221 1001 P221SI Receiver Module 584 523 521 221 1001 P221SI 46...
Страница 54: ...For Models MDV31 39 Replacement Parts continued 54...
