Table of Contents
Advertisement
For PVC/CPVC/PP material
• When preparing and assembling the pipe,
follow instructions as provided by the pipe
manufacturer. In general, the following practices
must be observed:
- Squarely cut all pieces of pipe.
- Remove all burrs and debris from joints and
fittings.
- All joints must be properly cleaned, primed,
and cemented. Use only cement and primer
approved for use with the pipe material as
outlined on page 20.
• PVC, CPVC or PP pipe has been approved for
use on this Combi Boiler with zero clearance to
combustibles.
• The pipe shall be installed so that the first 3 ft
(0.9 m) of pipe from the Combi Boiler flue outlet
is readily accessible for visual inspection.
[How to tighten the Vent Pipe]
1. Continue to insert the Vent Pipe until it reaches
to the base of the Combi Boiler Exhaust and
Intake Flue.
• The Vent Pipe will be inserted approximately
2.3 in. (60 mm).
2. Secure the Vent Pipe by tightening the band
using a screwdriver.
• The tightening torque shall be the following:
- For PVC/CPVC pipe: between 16 and 20 in lb
- For PP pipe: between 12 and 15 in lb
Exhaust and
Intake Flue
For flexible pipe for chimney
• Every venting system must be properly planned
and installed for optimum performance and
safety. A flexible pipe installation always begins
with an inspection of the existing masonry
chimney (Chimney must be clean, sized correctly,
properly constructed and in good condition, if
being installed in a chimney as a liner). Inspect
chimney to make certain it is constructed
according to the latest revision of the NFPA211.
Local codes may differ from this code and should
be checked. Where there is a conflict, the local
code will prevail. In Canada refer to the National
Building Code or CSA-A405 as applicable.
Vent Pipe
Screwdriver
- Flat head
- Box wrench (5/16 in.)
• Refer to manufacturer's instructions for assembly
of all flexible components including the chimney
cap and adaptor to rigid pipe at base of masonry
Chimney.
• Ensure none of the vent pipes and chimneys are
damaged or blocked.
• Do not use an existing chimney as a raceway for
a flue pipe if another appliance or fireplace is
vented through the chimney, and do not have any
connections inside the chimney chase.
• When using an inoperative chimney as a means
of a chase for the vent system, the surrounding
space within the chimney cannot be used to draw
combustion air or vent another appliance.
• The remaining space surrounding a chimney
liner, the flexible pipe within a masonry, metal
or factory-built flue shall not be used to supply
combustion air to the Combi Boiler. A separate
combustion air intake pipe routed back to the
Combi Boiler can be used in the remaining space
if required, the Combi Boiler venting system is
approved for zero clearance, and can be run
directly beside the combustion air intake pipe.
Bolt or screw joints together to avoid sag.
• Flexible pipe vertical offsets must not exceed 45°
and are limited to a maximum number of 2.
• Connect flue pipe to the chimney with the
shortest possible length of flue pipe.
• Slope the horizontal vent 1/4 in. upwards for
every 12 in. (300 mm) toward the chimney from
the Combi Boiler.
• Check and confirm that there is no tension to
the flexible pipe by hanging or suspending of
anything.
• Check vent piping at least once a season. Verify
vent pipe connections to chimney are secure and
no obstructions are present. If vent piping shows
sign of leaking, replace it immediately.
Venting the Combi Boiler
21
Advertisement
Table of Contents
