Laars FTCF140 - Air Supply and Vent Connections; Direct Venting

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) eld-supplied
plastic vent piping must comply with CAN/
CSA B149.1 (latest edition) and be certied
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
ttings. All plastic components and specied
primers and glues of the certied 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 tting.
- 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 FTCF140. 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