Bryant BFIT 1000, Installation, Operation And Maintenance Manual

Page: 18 / 68

18
VII. Venting
A. General Guidelines
1. Listed Vent and Combustion Air Systems
a. Install vent system in accordance with
N
ational Fuel Gas Code, ANSI Z223.1/NFPA
54
or Natural Gas and Propane Installation
Code, CAN/CSA B149.1 Installation Code for
Canada, or, applicable provisions of local
building codes.
b. The BFIT is certified as
Category II/IV
boiler. Category II vent is required when
common venting multiple units. Refer to
Section H "Common Venting Requirements."
c. The vent pipe serves to expel products of
combustion to a safe point of discharge
and air intake pipe serves to deliver
combustion air from outdoors (Refer part
E "Optional Room Air for Combustion Air.")
The following vent/combustion system
materials are approved for use with the
BFIT boilers.
WARNING
Failure to vent this boiler in accordance with
these instructions could cause products of
combustion to enter the building resulting in
severe property damage, personal injury or
death.
Do not locate vent termination under a deck, or
where exposed to prevailing winds.
Do not locate combustion air termination where
volatile vapors or other chemicals are present
(see Table 4). Severe boiler corrosion and failure
will result.
Do not interchange vent systems or materials
unless otherwise specified.
Do not apply thermal insulation to vent pipe or
fittings.
Do not use a barometric dBFITer; draft hood or
vent dBFITer with this boiler.
Atmospheric venting is prohibited.
2. Requirements
a. Do not exceed maximum vent/combustion
air lengths listed in Table 7. Vent and
combustion air length restrictions are based
on equivalent length of vent and combustion
air pipe (total length of straight pipe plus
equivalent length of fittings). Table 8 lists
equivalent lengths for fittings.
b. Do not include vent/combustion air
terminal in equivalent feet calculations.
Use vent/combustion air equivalent length
worksheet provided in Table 9.
c. See Table 5 for recommended clearance to
service and combustible materials.
Vent System Material Pipe Direction
Standard-
Factory
Supplied
Vent Two-Pipe AL 29-4C Vertical or Horizontal
Air Intake Two-Pipe PVC/ Galvanized steel Vertical or Horizontal
Option 1
Vent Two-Pipe, Rigid Polypropylene Vertical or Horizontal
Air Intake Two-Pipe, Rigid PVC, Galvanized steel Vertical or Horizontal
Option 2
Vent Two-Pipe, Rigid CPVC Vertical or Horizontal
Air Intake Two-Pipe, Rigid PVC/Galvanized steel Vertical or Horizontal
Note: For "Option 1" refer to Table 10 for polypropylene vent adapter.
Table 6: Vent/Air Intake Options
WARNING
Moisture and ice may form on surface around
vent termination.
To prevent deterioration, surface must be in
good repair (sealed, painted, etc.).
Do not allow low spots in the vent where con -
densate may pool.
Use specified vent and combustion air pipe
diameters.
All vent and combustion air pipe must be
sealed and airtight.
Alteration of the boiler vent connection is
prohibited.