INSTALLATION AND OPERATION INSTRUCTIONS
1-8
SFC COMBI BOILERS SFC-99, SFC-125
Follow all installation instructions supplied by the pipe and fitting
manufacturer.
Prior to assembly, ensure all venting components are clean
of burrs/debris. Ensure that ingestion into the fan of PVC debris (left in the
combustion air piping) is avoided.
General Venting/Piping Requirements
Slope exhaust venting towards the unit with a pitch of at least 1/4" per foot.
Follow PPs manufacturer requirements, so condensate runs back towards the
trap. Support should be provided for intake and vent piping, particularly for
horizontal runs (follow the local code).
Insert exhaust piping directly into the 3" female plastic fitting on the top center of
the unit, and run it horizontally or vertically to the outdoors. We recommend using
a bird screen of 1/4" stainless steel or plastic mesh (e.g., IPEX System 636 drain
grate for CPVC systems to guard against foreign objects
.
Figure 4
Secure joints using appropriate solvent cement to bond the respective pipe
material (Canada: PVC/CPVC cement approved under
ULC-S636, in accordance
with its manufacturer instructions;
USA: PVC (ASTM D2564), or PVC (D2235).
Use transition glue anywhere that PVC and CPVC are joined. Follow the cement
manufacturer’s instructions closely when joining various components. For PPs,
connections must be secured using approved retainer clips supplied by the
respective PPs manufacturer.
Ensure that all vent connections are liquid and pressure tight. Prior to firing the
unit, and before any of the venting run is concealed by the building construction,
you must test the exhaust joints with a soap/water solution. You must fill the
condensate trap before testing.
BEST PRACTICES
To reduce the possibility of
expansion noise, allow a 1/4"
gap around the exhaust and
air intake piping.
