12.Be sure to check tightness of pilot connections and condition of burner flames after reassembly. (See Fig. 11.)

13.Be sure vent pipe connections to chimney are secure and no obstructions are present.

PROCEDURE 8ÐBLOWER

The blower motor features permanently lubricated ball bearing construction. Lubrication is not required.

SERVICE HINTS

You may avoid inconvenience and service calls by checking these points before you call for service.

FOR YOUR SAFETY

WHAT TO DO IF YOU SMELL GAS

1.Do not try to light any appliance.

2.Do not touch any electric switch; do not use the phone.

3.Leave the building immediately, then call your gas supplier.

4.If you cannot reach the gas supplier, call the fire department.

 

IF SYSTEM IS NOT HEATING OR NOT GIVING ENOUGH HEAT. . .

Possible Cause

 

What To Do

Thermostat is not set correctly

 

Reset thermostat above room temperature.

Burner is not operating properly

 

Check flame. If it is yellow, burner is not getting enough air. If flame is blue and noisy and seems to lift off

 

the burner, burner is getting too much air. Contact your service technician.

 

 

No electric power to boiler

 

Check overcurrent protection. Check to be sure electric power supply circuit is on.

Controls out of adjustment

 

Reset according to instructions.

Radiators not heating

 

Open radiator vents to vent excess air. Check flow control valve (if used). It may be in closed position.

Circulator pump not running

 

Check overcurrent protection. Check relay operation.

Poor electrical contact

 

Check all control terminals and wire joints.

Chimney flue is blocked

 

Pressure switch will not close and pilot spark will not operate to start pilot. Have your service technician

 

check and correct, if necessary.

 

 

Rollout switch blown

 

Have your service technician check heat exchanger for blockage. Replace rollout switch with exact replace-

 

ment.

 

 

 

 

IF BURNER IS NOISY. . .

Possible Cause

 

What To Do

Gas input amount is incorrect

 

Contact your service technician.

 

 

RELIEF VALVE LEAKING. . .

Possible Cause

 

What To Do

Dirt on seat

 

Open valve manually. Allow water to run and clear valve seat.

Waterlogged expansion tank

 

Drain tank. See instructions.

HAVE YOUR SERVICE TECHNICIAN CHECK ANY PROBLEM YOU ARE UNABLE TO CORRECT.

Ð18Ð

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National Products Series B Procedure 8ÐBLOWER, Service Hints, Ð18Ð, If System is not Heating or not Giving Enough Heat

BW3, Series B specifications

National Products Series B and BW3 are pioneering additions to the realm of mobile workstation solutions, designed specifically for professionals who operate in fast-paced environments. These rugged and versatile products cater to a variety of sectors, including law enforcement, emergency response, and field service, ensuring that users remain efficient and organized while on the move.

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