Carrier BW4, BW5 Owner's Manual

USERSINFORMATIONMANUAL

OIL-BURNINGEQUIPMENT:

STEAMANDHOT-WATERBOILERS

IMPORTANT

• READ AND SAVE THESE INSTRUCTIONS FOR
REFERENCE.

• USE ONLY NUMBER 2 FUEL OIL.

CAUTION

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• DO NOT USE GASOLINE, CRANKCASE DRAININGS,
OR ANY OIL CONTAINING GASOLINE.

• NEVER BURN GARBAGE OR P APER IN THE UNIT ,
AND NEVER LEAVE COMBUSTIBLE MATERIAL
AROUND IT.

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WARNING

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• KEEP YOUR BOILER AND THE SPACE AROUND
THE APPLIANCE CLEAR OF DEBRIS. DO NOT
STACK ITEMS ON OR AROUND THE APPLIANCE
WITHIN THE REQUIRED CLEARANCES TO
COMBUSTIBLES.

• ENSURE THAT THE SUPPLY OF COMBUSTION
AIR TO THE APPLIANCE IS NOT OBSTRUCTED
OR CUT OFF. ENSURE THAT THE PROPER
VENTILATION TO THE APPLIANCE AREA IS
MAINTAINED.

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OG-BW4-01

[P/N# 240006274G Rev. B 12/2012]

INSTRUCTIONS TO OBTAIN PROPER

OPERATION OF THE BOILER

CAUTION

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• 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
ACCUMULA TED OIL, OR IS FULL OF VAPOR, OR
IS VERY HOT.

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, CO2 indicator and draft
gauge. Bacharach or Dwyer test kits include these instruments.

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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, CO2, smoke and
temperature readings. Adjust air shutter on oil burner to obtain
a “trace” of smoke. Measure CO2 at this point. Increase air
adjustment to lower CO2 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.

2

SHUTTING DOWN THE BOILER FOR

EXTENDED PERIODS OF TIME

CAUTION

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ALWAYS KEEP THE OIL SUPPLY VALVE SHUT OFF
IF THE BURNER IS SHUT DOWN FOR AN EXTENDED
PERIOD OF TIME.

• Always turn off electrical power to the boiler via the fi eld
installed fused disconnect switch if the boiler is shut down
for an extended period of time.

• When restarting the boiler from an extended shutdown,
follow the Operating Instructions in the Installation Manual
and Operating Instructions.

GENERAL MAINTENANCE DURING OPERATION

The following preventative maintenance should be performed
by a qualifi ed service technician annually prior to the heating
season.
Preventative maintenance of an oil fi red boiler reduces
operating costs. The boiler and vent pipe should be inspected
for accumulation of soot or scale deposits periodically but at
least once every year before the start of each heating season.
When soot is present on the section walls and fl ue ways,
improper combustion will result, causing additional sooting and
scaling until fl ue ways are completely closed.
Periodic inspection and tightening of the tank-less heater/cover
plate bolts, if applicable, will reduce the risk of leaks.

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WARNING

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ALWAYS DISCONNECT POWER TO THE BOILER WITH
THE EMERGENCY POWER ISOLATION SWITCH WHEN
SERVICING THE BOILER. THE EMERGENCY POWER
ISOLATION SWITCH IS FIELD INSTALLED AND SHOULD
BE WITHIN 5 FEET OF THE BOILER.

3

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