Bradford White 20A Operations Instructions download pdf (Page 8)

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BRADFORD WHITE CORP.

rating to the room, but other heat sources may be present.

2.2 Venting

2.2.1 Vent Categories

Depending upon desired Brute Deluxe venting, it

may be considered a Category I or a Category III

appliance. In general, a vertical vent system will be a

Category I system. However, in rare instances, a vertical

vent system may be considered Category III. In the U.S.,

the National Fuel Gas Code (ANSI Z223.1-Latest

Edition), or in Canada the CSA B149.1 (latest edition),

defines a Category I vent system, and includes rules and

tables to size these vent systems. If the Brute Deluxe’s

vertical vent system does not satisfy the criteria for

Category I venting, it must be vented as a Category III

system.

All Brute Deluxe vent systems which discharge

horizontally (without the use of a power venter) are

considered Category III vent systems.

2.2.2 Category I Vent

When vented as a category I appliance, the vent

system must conform to the National Fuel Gas Code (ANSI

Z223.1-Latest Edition) in the U.S., or in Canada, to CSA

B149.1 (latest edition). The vent system must be sized and

installed for a Category I Fan-Assisted Appliance.

If chimney height is greater than 25 feet, or if multiple

units are vented into the same vertical vent, a barometric

damper must be installed on each appliance, such that the

flue draft does not exceed (negative) 0.1" w.c.

If using a power venter for any type of Category I

venting, the draft should be set between (negative) 0.01

and 0.10" w.c.

2.2.3 Common Venting Systems

Brute Deluxe units are Category I fan-assisted

when vented vertically and adhering to all applicable

codes.

When common venting Brute Deluxe fan-assisted

unit with other appliances through one shared vertical

duct called a “common vent”, special care must be taken

by the installer to ensure safe operation. In the event that

the common vent is blocked, it is possible, especially for

fan-assisted devices, to vent backwards through non-

operating appliances sharing the vent, allowing

combustion products to infiltrate occupied spaces. If the

appliances are allowed to operate in this condition,

serious injury or death may occur.

WARNING

Operation of appliances with a blocked common vent

may lead to serious injury or death. If safe operation of

all appliances connected to a common vent cannot be

assured, including prevention of spillage of flue gasses

into living spaces, common venting should not be applied,

and appliances should each be vented separately.

Proper vent sizing, construction and safety

requirements from the National Fuel Gas Code, ANSI

Z223.1 or in Canada, from CSA B149.1 as well as all

applicable local codes must be followed.

As an additional precaution, it is recommended that

a Carbon Monoxide (CO) alarm be installed in all

enclosed spaces containing combustion appliances.

Brute Deluxe units are not allowed to be vented

into a common horizontal vent system, unless a properly

sized vent fan is used, and the common vent system is

properly designed by the vent fan manufacturer or a

qualified engineer.

Refer to the installation and operating instructions on

all appliances to be common vented for instructions,

warnings, restrictions and safety requirements. If safe

operation of all appliances connected to a common vent

cannot be assured, including prevention of spillage of flue

gasses into living spaces, common venting should not be

applied, and appliances should each be vented separately.

2.2.4 Category III Vent

When the Brute Deluxe is vented with horizontal

discharge, it must be installed per this installation

manual and the venting system manufacturer’s

installation instructions. The vent system must be sealed

stainless steel (see Table 5).

Route the vent pipe to the heater as directly as

possible. Seal all joints and provide adequate hangers as

required in the venting system manufacturer’s Instal-

Figure 3. Combustion Air and Vent Through Roof.

TERM DESCRIPTION

Pipe

Single-wall galvanized steel pipe, 24 gauge

minimum (either insulated or non-insulated)

Joint

Permanent duct tape or aluminum tape

Sealing

Table 4. Required Combustion Air Piping Material.

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 39 40

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Bradford White 20A Operations Instructions Page 8

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