Bradford-White Corp BRUTE DELUXE BMT2V Manual De Usuario

Page 9

The combustion air can be taken through the 

wall, or through the roof. When taken from the wall, 

it must be taken from out-of-doors by means of the 

Bradford White horizontal wall terminal (

see Table 1

). 

When taken from the roof, a field-supplied rain cap or 

an elbow arrangement must be used to prevent entry of 

rain water (

see Figure 2

).

  Use single-wall galvanized pipe, 

per Table 

4,

 for the combustion air intake (

see Table 1

 for 

appropriate size). Route the intake to the heater as 

directly as possible. Seal all joints with tape. Provide 

adequate hangers. The unit must not support the 

weight of the combustion air intake pipe. Maximum 

linear pipe length allowed is 50 feet (15.2m). Three 

elbows have been calculated into the 50-foot (15.2m) 

linear run. Subtract 10 allowable linear feet (3.0m) for 

every additional elbow used (

see Table 1

). When fewer 

than 3 elbows are used, the maximum linear pipe 

length allowed is still 50 feet (15.2m).

Term

Description

Pipe

Single-wall galvanized steel pipe, 24 gauge 

minimum (either insulated or non-insulated)

Joint Sealing Permanent duct tape or aluminum tape

The connection for the intake air pipe is on the 

filter box. The Brute Deluxe appliances may have 

venting and combustion air ducting attached to the top 

or the back. They are shipped with the connections 

at the top. For attaching either or both pipes to the 

back, the mounting flanges are reversible by removing 

the mounting screws and orienting the flanges in the 

desired position. Replace the screws after positioning 

flanges. Run a bead of silicone around the collar and 

slide the pipe over the collar. Secure with sheet metal 

screws.

In addition to air needed for combustion, air 

shall also be supplied for ventilation, including all air 

required for comfort and proper working conditions 

for personnel. The Brute Deluxe loses less than 1 

percent of its input rating to the room, but other heat 

sources may be present.

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 

Brute Deluxe’s vertical vent system may be considered 

Category III. In the U.S., the National Fuel Gas Code 

(ANSI Z223.1), or in Canada the Natural Gas and 

Propane Installation Code (CSA B149.1), 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.

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 the Natural Gas and Propane Installation 

Code (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 in. w.c.

If using a power venter for any type of Category 

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

0.01 and 0.05 in. w.c.

Brute Deluxe units are Category I fan-assisted 

when vented vertically and adhering to all applicable 

codes. 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. 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. 

Operation of appliances with a blocked common 

vent may lead to serious injury or death. Safety

devices must be implemented to prevent blocked 

common vent operation. 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.