The FT Series Floor Standing, Combination Boiler
Page 27
4.7
Air Supply and Vent Connections
4.7.1 Direct Venting
The boiler uses 3˝ or 2˝ diameter exhaust
and 3˝ or 2˝diameter intake air ducts. To
avoid leakage, use sealed venting and intake
pipe.
(For installations in Canada)
field-supplied
plastic vent piping must comply with CAN/
CSA B149.1 (latest edition) and be certified
by the Standard For Type BH Gas Venting
Systems, ULC-S636. Components of this
listed system must not be interchanged
with other vent systems or unlisted pipes or
fittings. All plastic components and specified
primers and glues of the certified vent system
must be from a single system manufacturer
and must not be intermixed with another
system manufacturer’s parts.
Tightening — Boiler Collar (Socket) to
Vent Pipe & Inlet Pipe
- Clean and dry your selected PVC, CPVC
vent pipe and boiler collar (socket).
- You can select to the size of vent pipe(2˝ &
3˝), according to the installation conditions.
- Push the pipe into the collar (socket) until
it touches the bottom of the socket fitting.
- For 2” installations, install using the
supplied 3” to 2” adaptor. Adaptor must be
installed in vertical section of piping only.
Table 5. Maximum Vent / Air Pipe Lengths for either 3” or 2 “ Pipes
2” pipe connected, using an adapter
3” pipe
NOTE: When using a 2” vent pipe, DIP Switch 4 must
be in the OFF position. For 3” Pipe vent, the
default setting for DIP 4 is ON.
Refer to Section 4.19
3” to 2”
adapter
is NOT
included.
Shown is the FTCF
140
. The inlet and
outlet are reversed on the FTCF
199
.
Combination Boiler Model
3˝ Combustion Air / Vent Pipe
2˝ Combustion Air / Vent Pipe
Max
Max
FTCF140/199
100´ (30M)
50´
*
(15M
*
)
NOTE: For each elbow, reduce maximum allowable length
• 5 feet (1.5M) for each 3-inch 90-degree elbow
• 2.5 feet (0.75M) for each 3-inch 45-degree elbow
• 8 feet (2.4M) for each 2-inch 90-degree elbow
• 4 feet (1.2M) for each 2-inch 45-degree elbow
• Max. 6 elbows for 3” vent, Max 4 elbows for 2” vent
*
Propane models are limited to 25 equivalent feet of 2” vent
