COZY VCR501A-H Installation And Operating Instructions Manual page 12

TROUBLE SHOOTING CHART - POOR HEATING RESULTS - Cont'd.
SYMPTOM
Not enough heat
Too nmch heat
POSSIBLE CAUSES
i. Heater undersized.
2. Temperature dial set too low.
3. Incon'ect gas supply pressure.
1. Temperature dial set too high.
2. Combination control valve sticks open.
CORRECTIVE ACTION
i. This is especially true when a dwelling or room is
enlarged. Have the heat loss calculated and compare
to the heater output (70% of input). Your gas company
or installer can supply you with this information. If
heater is undersized, replace with correct size unit.
2. Raise setting of temperature dial. See "Lighting and
Shutting Down Instructions".
3. Check gas supply pressure and regulator pressure as
outlined above.
1. Lower setting of temperature dial. See "Lighting and
Shutting Down Instructions".
2. Replace combination control valve.
TROUBLE SHOOTING CHART - AUTOMATIC PILOT & VALVE
Burner won't light Pilot flame too large or too small. 1. Re-adjust pilot flame using adjustment on combination
control valves (See Fig. 1 & 1A).
Defective combination control valve. 2. Replace valve.
Pilot outage
Pilot will not stay lit
when control knob
is released
l.
2.
1.
2.
3.
4.
5.
1.
2.
3.
4.
Dirt in pilot orifice.
Pilot lighter door open.
Defective automatic pilot section in
combination control valve.
Defective thermocouple.
Vent safety shut off system.
Pilot flame too large or too small.
Defective thermocouple.
Defective gas valve.
Loosen connections at spill switch or
ECO on gas valve.
1. Clean pilot orifice with air or solvent, do not ream.
2. Close pilot lighter door.
3. Replace combination control valve.
4. Replace thermocouple.
5. See "Venting" section.
1. Re-adjust pilot flame using adjustment on combination
control valves (See Fig. 1 & 1A).
2. Replace thermocouple.
3. Replace gas valve.
4. Tighten connections.
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