Thermo Products CMA3-50D36N, CMC1-50DV3N Yes AFTER GAS VALVE OPENS, DO THE BURNERS IGNITE?

Models: CMC1-75DV3N CMA3-75D36N CMA3-50D36N CMC1-75D36N CMC1-50D36N CMC1-50DV3N

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Yes

All installations and services must be performed by qualified service personnel.

Yes

AFTER GAS VALVE

OPENS, DO THE

BURNERS IGNITE?

Yes

DO BURNERS STAY

LIT PAST PROOF OF FLAME CHECK?

 

 

 

 

 

 

 

 

 

 

 

No

 

CHECK FOR PROPER

 

 

ADJUST TO 3.5" FOR NATURAL GAS

 

 

MANIFOLD PRESSURE.

 

 

 

 

OR 10.0" WC FOR LP GAS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

IS IGNITOR

 

 

REPOSITION TO

 

 

POSITIONED CORRECTLY?

 

 

 

 

CORRECT LOCATION.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOES THE INTEGRATED CONTROL

 

 

CHECK ACROSS THE

 

 

 

ENERGIZE THE

No

 

CIRCULATING AIR

No

REPLACE THE

 

CIRCULATING AIR BLOWER

 

 

 

BLOWER TERMINALS

 

 

 

 

 

 

 

 

INTEGRATED CONTROL.

 

AFTER THE 45 SECOND

 

 

"CIR N" & "HEAT"

 

 

 

 

 

 

 

 

TIME DELAY.

 

 

FOR PROPER VOLTAGE.

 

 

Yes

 

 

 

 

 

 

 

 

CONFIRM IF

DOES THE CIRCULATING

No

 

 

EITHER BLOWER WHEEL

DOES BLOWER

No

IS RUBBING AGAINST

AIR FAN COME ON

 

 

HOUSING OR MOTOR

 

SPIN FREELY?

 

WHEN ENERGIZED?

 

 

SHAFT IS SPINNING

 

 

 

 

 

Yes

 

FREELY AND REPAIR

 

 

 

OR REPLACE AS NECESSARY.

Yes

 

 

Yes

 

 

 

IS CAPACITOR

REPLACE MOTOR

 

 

 

 

 

WORKING PROPERLY

 

 

 

 

 

No

REPLACE CAPACITOR

55

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Thermo Products CMA3-50D36N, CMC1-50DV3N, CMC1-50D36N, CMC1-75D36N Yes AFTER GAS VALVE OPENS, DO THE BURNERS IGNITE?

FAQ

Is it safe to perform installations and services without a qualified service personnel?

No, all installations and services must be performed by qualified service personnel.

How do I troubleshoot burner ignition?

After gas valve opens, do the burners ignite? If yes, do the burners stay lit past proof of flame check? If no, check for proper manifold pressure. Adjust to 3.5" for natural gas or 10.0" WC for LP gas.

What should I do if the integrated control does not energize the circulating air blower?

Check across the circulating air blower terminals. If no, replace the integrated control.