Carrier BW4 Owner's Manual download pdf (Page 2)

Instruments are the only reliable method to determine proper air

adjustments. An improperly adjusted burner causes soot and

high fuel bills because of incomplete combustion of the fuel oil.

This in turn may require excessive boiler maintenance, service

costs, and in some instances, house cleaning or redecorating.

A competent service mechanic should be consulted to make the

proper adjustments with a smoke tester, CO

indicator and draft

gauge. Bacharach or Dwyer test kits include these instruments.

A ¼” diameter slot is provided in the inspection cover plate to

take draft readings in the combustion chamber. A ¼” diameter

hole will be required in the ﬂ ue pipe between the boiler and

barometric damper (if used) to take draft, CO

, smoke and

temperature readings. Adjust air shutter on oil burner to obtain

a “trace” of smoke. Measure CO

at this point. Increase air

adjustment to lower CO

approximately one (1) percent. Check

to ensure zero (0) smoke and correct draft is obtained for

the unit installed (reference the Boiler Installation Manual for

correct draft settings). If the proper draft can not be maintained,

changes and/or modiﬁ cations may be required in the venting,

chimney or combustion air supply.

CAUTION

• DO NOT START THE BURNER UNLESS ALL

CLEAN-OUT DOORS ARE SECURED IN PLACE.

• DO NOT ATTEMPT TO START THE BURNER

WHEN THE COMBUSTION CHAMBER HAS

ACCUMULATED OIL, OR IS FULL OF VAPOR, OR

IS VERY HOT.

INSTRUCTIONS TO OBTAIN PROPER

OPERATION OF THE BOILER

1 2 3 4 5 6 7 8

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Carrier BW4 Owner's Manual Page 2