Ducted Combustion Air; Venting - Bradford White Brute MagnaTech BMGV1600 Installation And Operation Instructions Manual

Other methods of introducing combustion and
ventilation air are acceptable, providing they conform
to the requirements in the applicable codes listed
above.
In Canada, consult local building and safety codes
or, in absence of such requirements, follow CAN/
CSA B149.

3.2.2 Ducted Combustion Air

The combustion air can be taken through the wall, or
through the roof. Manufacturer offers accessories to
use with ducted air systems, as shown in Table 5.
See Table 6 to select the appropriate diameter air
rain cap or an elbow arrangement must be used to
prevent entry of rain water. (See Figure 7).
Use ABS, PVC, CPVC, polypropylene, stainless
steel, or galvanized pipe for the combustion air
intake (See Table 6). The intake must be sized per
Table 2. Route the intake to the boiler as directly
as possible. Seal all joints. Provide adequate
hangers. The unit must not support the weight of the
combustion air intake pipe. The maximum equivalent
pipe length allowed is 100 feet (30 m).
Each elbow is considered to be 5 feet (1.5m)
When using polypropylene or stainless steel
elbow must be installed on the end of the air inlet
to act as an outdoor terminal. In vertical duct
applications, two elbows must be installed on the
end of the inlet to act as a vent terminal. When
elbows are use as terminals, appropriate screens
must be installed to prevent blockage.
The elbow(s) required for termination are not
included in the kits sown in Table 5
The connection for the intake air pipe is on the back
panel.
In addition to air needed for
combustion, air shall also
be supplied for ventilation,
including air required for
comfort and proper working
conditions for personnel. Refer
to the applicable codes.
3.3
Selection of improper vent materials for
installations that are installed in closets, or will be
operated in high ambient temperature levels, may
lead to property damage, personal injury, or death.
Failure to use the appropriate vent material,
installation techniques, or glues and sealants
could lead to vent failure causing property
damage, personal injury or death.
Use of cellular core PVC (ASTM F891), cellular
core CPVC, or Radel® (polyphenolsulfone) in
non-metallic venting systems is prohibited and that
thermal insulation is prohibited.
All venting must be installed according to this
manual and any other applicable local codes,
including but not limited to, ANSI Z223.1/NFPA 54,
CSA B149.1, CSAB149.2 and ULC S636. Failure
to follow this manual and applicable codes may
lead to property damage, severe injury, or death.
g
Boiler Model Vent Connection Size Diameter
(provided with boiler)
MGH/V1600
MGH/V2000
MGH/V2500
MGH/V3000
MGH/V3500
MGH/V4000
WARNING: Vent must be installed with appropriate condensate traps and using only specific
manufacturers, models and materials outlined in this manual.
Draft must always remain between -0.1" and -0.001" at all firing rates. If pressures outside of
this range are measured, consult professional venting engineer for recommendations, such as
double-acting barometric dampers to avoid reduced performance or hazardous conditions.
Table 7. Vent Sizing for Category II - Gravity Vent

Venting

WARNING
WARNING
WARNING
WARNING
g y g y
Vent Connector Size Diameter
6"
8"
8"
10"
10"
12
Page 11
(Increaser*)
14"
14"
18"
18"
22"
22"