Carrier BW3 Operations Instructions

NOTE: Read the entire instruction manual before starting the installation. These instructions must be affixed on or adjacent to the boiler.This symbol

3. Boiler installation site experiences gusting or high winds. A power venter can help prevent boiler from short cycling due to gusting or highwinds b

4. Install a sediment trap upstream of gas controls.5. Use 2 pipe wrenches when making connection to gas valve to keep it from turning.6. Install a ma

Fig. 7—Unit Wiring DiagramNOTE: If any of the original wire as supplied with the boiler must be replaced, it must be replaced with the same wire or it

SEQUENCE OF OPERATION1. Thermostat calls for heat, powering 1K relay coil and closing contacts 1K1 and 1K2.2. Circulator pump is powered through termi

PROCEDURE 8—WATER TEMPERATURE CONTROLThe water temperature limit control in relay is adjustable and may be set as necessary. It may be set as low as 1

BEFORE OPERATING, smell all around appliance area for gas. Be sure to smell next to floor because some gas is heavier than air and will settleon the f

CHECKING AND ADJUSTINGPROCEDURE 1—GAS VALVE SAFETY SHUTDOWN TESTWith main burners firing, disconnect ignition cable from intermittent pilot control bo

MAINTAINING BOILERPROCEDURE 1—BURNERSA visual check of pilot and main burner flames should be made at least once each year, preferably at beginning of

13. Be sure vent pipe connections to chimney are secure and no obstructions are present.PROCEDURE 8—BLOWERThe blower motor features permanently lubric

REPAIR PARTSIMPORTANT — READ THESE INSTRUCTIONS BEFORE ORDERING All parts listed in the following Parts List may be orderedthrough your nearest suppli

CHIMNEY AND VENT PIPE CONNECTION ...

REPAIR PARTSPropane Gas Burners and Manifold PartsThis is a Repair Parts List—Not a Packing ListKEYNO.DESCRIPTIONPART NO.2 Section 3 Section 4 Section

REPAIR PARTSJacket—Section and Base PartsThis is a Repair Parts List—Not a Packing ListKEYNO.DESCRIPTIONPART NO.2 Section 3 Section 4 Section 5 Sectio

REPAIR PARTSKEY NO. DESCRIPTION PART NO.1 3/4-in. ASME Relief Valve 146-22-0112 3/4-in. X 5-1/2-in. Nipple 146-07-0403 Temperature-Pressure Gage—3-1/2

A94328SERVICE TRAININGPackaged Service Training programs are an excellent way to increase yourknowledge of the equipment discussed in this manual, inc

© 2003 CAC/BDP 7310 W. Morris St., Indianapolis, IN 46231 imbw3a06—24—Catalog No. 63BW-3A2

INTRODUCTIONThis boiler cannot be used with all types of chimneys. Read these instructions carefully before installing.These Gas-Fired Hot Water Boile

LOCATING THE BOILERNOTE: This unit MUST be set on a concrete or other non-combustible material base or floor.1. Select level location as centralized w

9. Advise owner to keep air passages free of obstructions. Ventilation and combustion air must enter boiler room without restrictions.10. The boiler s

PROCEDURE 2—BOILER LOCATED IN CONFINED SPACEEXAMPLE 2A: ALL AIR FROM INSIDE THE BUILDINGThe confined space shall be provided with two permanent openin

INSTALLATION—SYSTEM PIPING1. Place boiler in selected location (as close to chimney as possible). Boiler is shipped assembled. Only the relief valve w

2. The boiler’s induced draft blower has a 3-in. outlet. A 3-in. X 4-in. increaser fitting is included in parts bag. Locate increaser fitting on outle

For boilers with connections to gas vents or chimneys, vent installations shall be in accordance with Part 7 NFGC, Venting of Equipment, in theUnited