NTI FTG 600 - Page 11

FTG │Installation & Operation Manual
11
Flammable Solvents and Plastic Piping
Due to the extremely flammable characteristics of most glues, cements, solvents and primers used in the process
of joining plastic vent and air-inlet pipe, explosive solvent vapors must be evacuated from the vent and air-inlet
prior to start-up. Avoid using excess cement or primer that may lead to pooling inside the pipe assembly. Freshly
assembled piping assembly should be allowed to cure for a minimum of 8 hours before applying power to the gas
fired boiler. Refer to Mandatory Pre-commissioning Procedure for Plastic Venting in this section.
Flammable Cements and Primers – It is the installers’ responsibility to familiarize
themselves with the hazards associated with explosive solvents and to take all precautions
to reduce these risks. Failure to follow these instructions can cause explosions, property damage, injury or death.
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 Transformer.
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 a complete trial for ignition, consisting of pre and post purge of the combustion blower, until an
ignition lockout occurs.
6) Turn power off and reconnect the cable to the Spark Ignition Electrode and Ignition Transformer.
Near Boiler Vent/Air-inlet Piping
Exhaust-vent Connector – the FTG exhaust-vent connector is designed to accept single-wall FasNSeal
®
Stainless Steel (SS) Special Gas Venting. To use other types of venting, the appropriate adaptor must be
inserted into the boiler exhaust-vent connector; see Table 4-4 for a list of approved venting materials and
Table 4-3 for a list of approved boiler exhaust-vent adaptors.
Failure to use the appropriate exhaust-vent adaptor for the type of venting being used,
will lead to flue gas leakage possibly resulting in property damage, Carbon Monoxide
poisoning or death.
Air-inlet Connector (FTG 600-800) – the FTG 600 & 800 employ a universal air-inlet connector that accepts
DuraVent’s 6 in. PolyPro
®
Polypropylene (PP) or FasNSeal
®
Stainless Steel (SS) pipe, as well as 6 in.
PVC/CPVC/ABS pipe, without the need for additional adapters. The universal connector incorporates three
seals, one for 6 in. PVC/CPVC/ABS pipe (6.625 in. OD), one for 6 in. PolyPro
®
PP pipe (5.94 in. OD) and
one for 6 in. FasNSeal
®
SS pipe (6 in. OD).
Air-inlet Connector (FTG 1200-2400) – the FTG 1200 through 2400 employ an 8 in. rubber coupling that
directly accepts most 8 in. diameter air-inlet pipe material.
PVC Exhaust Venting – When exhaust venting with PVC, insert a length of CPVC Pipe (see Table 4-2) into the
PVC/CPVC exhaust-vent adapter (see Table 4-3); cement the other end of the CPVC Transition Pipe to the
PVC exhaust venting using a field supplied PVC or CPVC coupling; see Figure 4-1(a). Where PVC cements
to CPVC, be sure to use an approved transition cement, see Table 4-4.
Table 4-2 CPVC Vent Pipe Transition Piece (used when venting with PVC)
Model No.
Vent Pipe Size
CPVC Transition Vent Pipe Length
Full Insertion Depth
FTG 600-800
6”
Minimum 6.5” (factory supplied)
2-7/8”
FTG 1200-2400
8”
Minimum 9”
2-7/8”