Operating instructions

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CROWN BOILER COMPANY

BWF SERIES BOILER

CATEGORY I VENT KIT

INSTALLATION AND OPERATING INSTRUCTIONS

I Product Description

The BWF Category I vent kit is used to vent the BWF series boiler into a Category I (“Chimney”) vent system. This kit

consists of a special box-shaped adapter which is used to connect single wall smoke pipe or “B” vent to the fan discharge

of a BWF boiler. This adapter is equipped with a spill switch designed to shut down the burners and fan in the event of a

vent blockage. When connected to a properly sized and constructed vent system, all parts of the vent system, including

the adapter box, are under negative pressure.

II Before Installing

1) Read the installation instructions provided with the boiler. The instructions provided with the boiler cover all aspects

of the boiler installation except for venting. These instructions cover the installation of the Category I vent kit and

connection of the boiler to a Category I vent system.

2) Vent installation must be in accordance with the latest edition of the National Fuel Gas Code (NFPA54/ANSI Z223.1)

and all applicable local codes:

• Make sure that the boiler can be vented using a suitable chimney in accordance with all applicable codes.

• In the context of the National Fuel Gas Code, the BWF is classified as a Category I fan-assisted appliance only

when this kit is installed. When this kit is not installed, the BWF is classified as a Category III appliance and

must be vented using one of the stainless steel special vent systems shown in the installation manual.

• Make sure that you have the correct vent kit for the size boiler being installed:

BWF061 - BWF128: Crown #650140 (equipped with 5” collar)

BWF162 - BWF-229: Crown #650141 (equipped with 6” collar)

III Vent Kit Installation

1) Screw the four 10-32 studs supplied into the fan flange

2) Verify that the boiler model number marked on the outlet orifice matches that of the boiler being installed (see Fig. 1).

3) Slip a gasket, the outlet orifice, and the second gasket over the studs as shown in Figure 1.

4) Install the adapter box over the studs with the spill switch facing the right side of the boiler. Secure with the 10-32 nuts

and washers provided.

5) Route the wire harness from the spill switch into the boiler vestibule through knockout “A” shown in Figure 1.

6) Locate the 3/16 male/female quick-connect in the orange wire leading from the high limit. This quick-connect is

located near the right side of the vestibule where the conduit from the high limit enters the vestibule (Figure 2).

7) Unplug this quick connect.

8) Plug the spill switch harness into quick connects opened in Step 7 (also see connection and ladder diagrams).

9) Boiler is now ready to be connected to the vent system.

WARNING

Improper installation, adjustment, alteration, service, or maintenance of this product can cause property damage,

injury, or loss of life. For assistance or additional information, consult a qualified installer, service agency, or the

gas supplier.

PN 980490 Rev. 0

Summary of content (6 pages)

PAGE 1
CROWN BOILER COMPANY BWF SERIES BOILER CATEGORY I VENT KIT INSTALLATION AND OPERATING INSTRUCTIONS WARNING Improper installation, adjustment, alteration, service, or maintenance of this product can cause property damage, injury, or loss of life. For assistance or additional information, consult a qualified installer, service agency, or the gas supplier. I Product Description The BWF Category I vent kit is used to vent the BWF series boiler into a Category I (“Chimney”) vent system.
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IV Vent System Installation Figure 3 shows a typical BWF Category I vent system. The major components of this system are the adapter box, the vent connector, and the chimney. 1) Acceptable Chimneys - The following chimneys may be used to vent BWF series boilers: • Listed Type B or L gas vent - Install in accordance with the manufacturer’s instructions, the terms of its listing, and applicable codes.
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IV Removing an Existing Boiler from a Common Chimney In some cases, when an existing boiler is removed from a common chimney, the common venting system may be too large for the remaining appliances. At the time of removal of an existing boiler, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining connected to the common venting system are not in operation.
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V Service and Maintenance Perform all service and maintenance shown in the BWF installation manual. In addition, inspect the adapter box and vent system for the following: • • • Blockages (including blockages in the blocked vent switch spillway) Corrosion or other deterioration Missing or loose supports If the blocked vent switch opens, both the burners and fan will shut down. In order to restart the boiler, it will be necessary to push the red reset button on the top of the spill switch.
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VI Parts (See Figure 1 for Illustrations) DESCRIPTION ADAPTER BOX (5" COLLAR) ADAPTER BOX (6" COLLAR) BLOCKED VENT SWITCH B.V.S. HARNESS CABLE CLAMP #10 X 1/2 SHEET METAL SCREW 10-32 X 1" STUD 10-32 NUT #10 FLAT WASHER QTY. OR CROWN P.N. 650145 650146 960650 960651 960655 90-212 900229 90-219A 90-057 6 KIT PART # 650140 USED WITH BWF061 - BWF128 1 ea. 1 ea. 1 ea. 1 ea. 2 ea. 4 ea. 4 ea. 4 ea. KIT PART # 650141 USED WITH BWF162 - BWF229 1 ea. 1 ea. 1 ea. 1 ea. 2 ea. 4 ea. 4 ea. 4 ea.