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manufacturer’s instructions before operating the boiler.
7) Assembly of Heat Fab Saf-T Vent SC - On CWD Boiler installations where Saf-T Vent SC is used, some Saf-T Vent EZ
Seal (single wall pipe) will always be required between the boiler and the Saf-T Vent SC. Install this pipe as described
above. On all systems except vertical coaxial systems (Options 12, 13), the following Heat Fab adapters will be needed to
adapt from Saf-T Vent EZ Seal to Saf-T Vent SC:
Vent Size Heat Fab Part Number
3” SC03ADEZ
4” SC04ADEZ
On vertical coaxial vent systems employing Saf-T Vent SC, the transition from Saf-T Vent to Saf-T Vent SC is made with
one of the following Air Intake Tees:
Vent Size Heat Fab Part Number
3” SC03TAD4
4” SC04TAD4
Assemble the Saf-T Vent EZ Seal to the boiler and the adapter as described in (6) above. Proceed as follows to assemble the
Saf-T Vent SC:
a) Clean both ends of the inner pipes to be joined with an alcohol pad. This will remove any foreign matter which may effect
the integrity of the seal. Insert the male end of the fi rst piece of pipe into the adaptor. In extremely dry conditions it may
be helpful to moisten the gasket with clean water prior to assembly.
b) Push the fi rst Saf-T Vent SC section into the adaptor until the outer jacket has made contact with the snap ring located
inside the female end of the adaptor. When fully assembled the outer female end will overlap the male end by 1”.
c) Use the three self tapping screws provided with the vent to attach the fi rst piece of pipe to the adapter. No pre drilling is
required. If using a variable torque screw gun, use the low torque setting to install the screws so as not to strip out the
holes. If a hole does become stripped due to over tightening, a larger (1/2” long max.) screw or short pop rivet may be
used.
d) Seal all the joints in the outer jacket with foil tape or exterior grade silicone sealant.
e) Repeat steps (a - d) to assemble the remaining sections of Saf-T Vent SC.
f) Support the Saf-T Vent SC as called for in Heat Fab’s installation instructions. Also make sure that fi re stops are provided
as called for in Heat Fab’s instructions and local codes.
g) After the Saf-T Vent SC exits the building, one of the following adaptors will be needed to install the terminal:
Vent Size Heat Fab Part Number
3” 5300CI
4” 5400CI
On vertical coaxial vent systems (Vent Options 12, 13) this adapter also acts as the combustion air intake terminal. In other
installations, the openings in this adapter provide ventilation between the inner and outer walls.
FIGURE 22: FASNSEAL CONNECTION TO VENT COLLAR