General Venting
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FTV I&O Manual
12
Mandatory Pre-commissioning Procedure for Plastic Venting (PVC or CPVC)
Do not apply power to the boiler prior to Step 4 in the Mandatory Pre-commissioning
Procedure for Plastic Venting.
1)
Working with the power turned off to the boiler, completely install the vent and air-intake system, securely
cementing joints together. If possible, allow primers/cements to cure for 8 hours before firing the burner. If
curing time is less than 8 hours, proceed with Steps 2 through 6.
2)
Maintain the boiler gas supply shut-off valve in the off position.
3)
Remove the cable from the Spark Ignition Electrode and Ignition Controller.
Spark Ignition Circuit
- Maintain a safe distance (2 in. minimum) from the spark ignition
circuit to avoid injury from electrical shock.
4)
Turn power on to the boiler and apply a heat demand.
5)
Allow for 5 complete trials for ignition, consisting of pre and post purge of the combustion blower, until an
ignition lockout occurs. Repeat the process one more time (i.e. 10 complete ignition sequences in total).
6)
Turn power off and reconnect the cable to the Spark Ignition Transformer.
Near Boiler Vent/Air-inlet Piping
The FTV employs universal Exhaust-vent and Air-inlet appliance adapters that accept 3 in. PVC/CPVC,
Polypropylene (PP) or FasNSeal Stainless Steel (SS) piping, without the need for additional adapters. The
universal adapters incorporate three seals, one for 3 in. PVC/CPVC pipe (3.5 in. OD), one for 3 in. PP pipe (3.15
in. OD) and one for 3 in. FasNSeal SS pipe (3 in. OD). See Figure 4-2(a) for gasket identification and pipe
insertion depth based on pipe material used. Prior to inserting the piping into the universal adapter, ensure it is
properly bevel (approximately 1/8 in.) to avoid damaging or dislodging the sealing gasket during installation; see
Figure 4-2(b).
Gasket Seating
- Improper seating can cause leakage and eventual failure of the sealing
gasket. Ensure the vent pipe is properly beveled, prior to installation, and that the pipe is
fully inserted into universal appliance adapter. Failure to follow these instructions may
result in serious injury or death.
PVC/CPVC Piping
– Ensure the
upper
gasket of the universal appliance adapter is in place and properly
positioned prior to installation. Ensure the venting system does not apply a load or strain on the boiler flue
outlet adapter; recommend using two elbows to create a “swing joint” to reduce potential strain on vent piping
and cemented joints. When exhaust venting with PVC, use the supplied 5” long CPVC Transition Pipe
provided with the boiler; insert the CPVC pipe into the exhaust adapter and cement the other end to the PVC
exhaust venting using a field supplied PVC or CPVC coupling. See Figures 4-3(a) and 4-3(b).
PVC Exhaust Venting
–
DO NOT
insert PVC pipe directly into the appliance exhaust
adapter, as it can deform from the clamping force of the gear clamp. Failure to follow
these instructions may result in gasket failure and/or the dislodging of the exhaust pipe
from the appliance adapter, resulting in property damage, serious injury or death.
PP Piping
– Ensure the
middle
gasket of the universal appliance adapter is in place and properly positioned
prior to installation. Ensure the venting system does not apply a load or strain on the boiler flue outlet adapter;
recommend using an elbow with an offset to reduce potential strain on vent piping and cemented joints. See
Figure 4-3(c).
Stainless Steel Piping
– The FTV universal appliance adapter is designed to connect directly to DuraVent –
FasNSeal AL29-4C Stainless Steel Special Gas Vent. Ensure the
lower
gasket of the universal appliance
adapter is in place and properly positioned prior to installation. Ensure the venting system does not apply a
load or strain on the boiler flue outlet adapter; recommend using two elbows to create a “swing joint” to
reduce potential strain on vent piping and cemented joints. See Figure 4-3(d).
Exhaust venting must be supported to reduce strain on piping joints. Failure to follow
these instructions may result in result in damage, serious injury or death.
In Canada, the first
3 ft (915 mm)
of vent piping must be readily accessible for inspection.
