NTI Trinity Tft399 Installation And Operation Manual page 12

│Installation and Operation Instructions
Trinity
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 Transformer.
Spark Ignition Circuit - Maintain a safe distance (2 inches 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 3 complete trials for ignition, consisting of pre and post purge of the combustion blower, until an
ignition lockout occurs. Repeat the process two more times (i.e. 9 complete ignition sequences in total).
6) Turn power off and reconnect the cable to the Spark Ignition Transformer.
Near Boiler Vent/Air-inlet Piping
Each Trinity Tft is equipped with a short piece of approved CPVC vent pipe which is to be used when venting
with PVC. Insert one end into the boiler flue outlet adapter and cement the other to the field venting (see Table
4-4 for approved venting material). The CPVC vent pipe should extend fully into the boiler flue outlet adapter
(see Table 4-2). Ensure that the venting system does not apply a load or strain on the boiler flue outlet adapter.
The manufacturer recommends using two elbows to create a "swing joint" to reduce potential strain on vent
piping and cemented joints. See Figures 4-3 through 4-5 for illustrations.
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 the boiler flue adapter. Failure to properly bevel and install, will lead to
gasket failure and flue gas leakage, which may result in serious injury or death.
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.
Polypropylene or Stainless Steel Venting – When using Polypropylene or Stainless Steel
piping, the appropriate appliance adapters must be used to transition the appliance vent
connections to accept the respective Polypropylene or Stainless Steel venting. See Table
4-3 for a list of approved adapters. Failure to use the correct adapter will result in flue gas
leakage resulting in property damage, serious injury or death.
Universal Appliance Adapters (Tft154 only) – Unlike other Tft models, the Tft154 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 for gasket identification and pipe insertion depth based on pipe material used.
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Tft Series