Install Instructions

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Type B Gas Vent - 3” to 12” Diameter

Installation Instructions

Please read and understand the requirements before proceeding.

Hart & Cooley Type B gas vent pipe and fittings are

Underwriters Laboratories-tested and listed to

Standard 441 for use with listed gas-fired appliances

that have been certified for use with Type B gas

vent. B-Vent is intended for neutral or negative draft

applications. It is designed for vertical installations

(including laterals) but may be used for horizontal

applications with a draft-inducing fan located such

that all indoor portions of the vent are under negative

pressure.

The materials in this B-Vent have been selected to

provide maximum resistance to corrosion and heat;

however, their use with temperatures exceeding

550° F or in highly corrosive atmospheres, such as

chlorinated hydrocarbons (i.e., refrigerants, dry-

cleaning fluids, degreasers, paint removers, etc.),

may substantially reduce their life expectancy.

These installation instructions will enable the in-

staller to make a safe and proper installation of the

vent. Compliance with these instructions will ensure

an installation that mee ts the requirements of all

National Building Codes and the National Fuel Gas

Code, NFPA 54 and NFPA 211. Hart & Cooley Type

B gas vents are listed under the follow-up service

of Underwriters Laboratories, Inc.

CAUTION

Flue gas temperatures must never exceed

550° F in any Hart & Cooley gas vent system.

Gas appliances that may be connected to Type

B gas vents

Type B gas vents may be used to vent gas

appliances listed for use with Type B gas vent.

These vents shall be installed in accordance with

our listing as detailed in these installation

instructions. The type of appliances that may be

vented with these vents include:

Unit heaters Room (space) heaters

Duct furnaces Central warm-air furnaces

Attic furnaces Hot-water boilers

Floor furnaces Steam boilers

Water heaters

CAUTION

Hart & Cooley Type B vents are not to be used

with appliances burning solid or liquid fuels.

Gas appliances that must be connected to

chimneys

The following appliances must be connected to

chimneys.

• All incinerators in domestic applications

• All appliances that may be converted readily t o

the use of solid or liquid fuels

• Combination gas/oil-burning appliances

• Unlisted appliances

General instructions

• The vent should always be sized for the sea-level

name plate input rating of appliances in

accordance with the procedures set forth in the

Gas Vent Capacity Tables, which appear in the

Gas vent chimney sizing & application guide

or in NFPA 54.

• Provide for adequate air supply for combustion

air and draft-hood dilution air. Refer to NFPA 54

or the application guide for recommended

arrangements and proper size of air supply

openings.

• Use only parts and fittings listed in the catalog to

ensure an approved vent.

Installation Instructions

Type B Gas Vent - 3" to 12" Diameter

Summary of content (12 pages)

PAGE 1
Type B Gas Vent - 3” to 12” Diameter Installation Instructions Installation Instructions Type B Gas Vent - 3" to 12" Diameter Please read and understand the requirements before proceeding. Hart & Cooley Type B gas vent pipe and fittings are Underwriters Laboratories-tested and listed to Standard 441 for use with listed gas-fired appliances that have been certified for use with Type B gas vent. B-Vent is intended for neutral or negative draft applications.
PAGE 2
Type B Gas Vent - 3” to 12” Diameter Installation Instructions • Portions of g as vents that may pass through accessible spaces must be enclosed to prevent personal contact with and possible damage to the vent. The enclosure also may have to meet fireresistance rating provisions. See all local and national codes that may apply. • Unenclosed outside vents below the roofline are prohibited. • No damper or other restriction is permitted in a gas vent.
PAGE 3
Type B Gas Vent - 3” to 12” Diameter Installation Instructions 4. Pass Type B Gas Vent through opening in Firestop Support (FSP). NAIL STRAPPING IN PLACE (FOUR PLACES) 5. Install Support Bracket as shown in Figure 1. Clamp bracket securely to pipe section, using the pair of bolts and nuts provided. Insert the included screws through the holes in the Support Bracket and into the pipe.
PAGE 4
Type B Gas Vent - 3” to 12” Diameter Installation Instructions Round Support Plates The Round Support Plate (RSP) is designed for use with 9- inch diameter and larger Type B Gas Vent. Each support is designed to support up to 30 feet of Vent Pipe when installed as follows. 1. It is recommended that the Vent Pipe be supported at least every other floor. The distance between supports must not, in any case, exceed 30 feet. 2.
PAGE 5
Type B Gas Vent - 3” to 12” Diameter Installation Instructions (A)It allows installation of the vent system prior to installation of appliances. (B)It allows disconnection of the appliance for service at any time without disturbing or temporarily supporting the vent. (C)It provides the required firestop as well as support. (D)It is UL-listed. Figure 8 shows the installation of an RSA support assembly. The support assembly shall be inst alled in the following manner.
PAGE 6
Type B Gas Vent - 3” to 12” Diameter Installation Instructions Installation for Optional Model RGS Firestop/ Gripper Support • At the desired location, cut a square or circular hole in the floor at a minimum of 2½ inches larger than the nominal pipe size, but not greater than 4 inches larger. See chart below. This will provide the required 1-INCH CLEARANCE FROM COMBUSTIBLES.
PAGE 7
Type B Gas Vent - 3” to 12” Diameter Installation Instructions of the vertical vent. The horizont al length of this vent connector should not exceed 1½ feet for each inch of connector diameter. If it is necessary for B-vent connector to pass through a partition, an RWT thimble may be used, or the wall framed to allow 1-INCH CLEARANCE and an RPC collar used on each side of the partition. When a vent connector is used, it should have as much vertical rise as possible BEFORE the horizontal run.
PAGE 8
Type B Gas Vent - 3” to 12” Diameter Installation Instructions • Four-inch round vent (4RPX) may be used in a 2” x 6” Fire-stopping stud wall. The proper clearance in a 2” x 6” wall is • In single-story, slab-floor houses having an attic provided by the spacer on the pipe and by the 4RFS space, a firestop spacer. All other uses of a 4” pipe require the firestop must normal 1-INCH CLEARANCE TO COMBUSTIBLES.
PAGE 9
Type B Gas Vent - 3” to 12” Diameter Installation Instructions • A cap or chimney housing offers resistance to the entrance of rain, snow and debris, as well as birds, and will minimize the effect of wind on the vent. It will protect the vent from down drafts caused by wind. However, no vent cap, cowl or top can overcome the adverse effect of a region of high static pressure around the vent terminal nor the effect of an interior region of low pressure.
PAGE 10
Type B Gas Vent - 3” to 12” Diameter Installation Instructions Painting the exposed vent surfaces above the roof will result in longer vent life. A good grade of paint designed for use on galvanized steel should be used. RHW and RM caps push straight down and snap onto the pipe. To remove, pull straight up and rock slightly. Outside vents Figure 20 Minimum He ight from Roof to Low e s t Discharge Opening, Ft.
PAGE 11
Type B Gas Vent - 3” to 12” Diameter Installation Instructions The chimney liner size must not be less than that specified in the appliance manufacturer’s instructions or smaller at any point than the connected appliance flue outlet size. Zero airspace clearance between the vent and the chimney interior surface is permitted. The masonry chimney may also have a zero airspace clearance (direct contact with) combustibles and the chimney exterior surface. This is permitted with nominal 4"-width brick.
PAGE 12
Type B Gas Vent - 3” to 12” Diameter Installation Instructions Hart & Cooley vent into Other THESE INSTRUCTIONS SHOULD REMAIN AVAILABLE TO THE HOMEOWNER AT ALL TIMES. Installation instructions for Hart & Cooley UL-listed Type B gas vent adapters The following table specifies the UL-listed adapters to be used when changing between Hart & Cooley and B-vent manufactured by others.