26
8.3
Mandatory Pre-commissioning Procedure
for PVC (Air-inlet only) and CPVC (Plastic
Venting)
9
WARNING
: R
ead and install the vent in accordance with the
vent manufacturer’s instructions. Failure to do so may result
in severe personal injury, substantial property damage or
death.
9
CAUTION
: Do not apply power to the boiler prior to Step 4 in
the Mandatory Pre-commissioning.
9
CAUTION
: Adhesives and sealents used in the assembly are to
be used within their marked time limitations.
Procedure for PVC (air-inlet only) and CPVC Plastic Venting.
1
With the power turned off to the boiler, completely install
the vent and air-intake system, securely cementing joints
together. If possible, a
llow 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
Keep the boiler gas supply shut-off valve in the off position.
3
Remove the wiring from the spark generator.
9
WARNING 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 5 complete trials for ignition, consisting of pre
and post purge of the combustion blower, until an ignition
lockout occurs. Repeat the process one more time (i.e. 10
complete ignition sequences in total).
6
Turn power off and reconnect the wiring to the spark
generator.
8.4 General Venting Rules and Guidelines
- Prevailing Winds: Ensure the vent is located where it will not
be exposed to normal prevailing winds.
- Combustion Air-inlet Contamination: Air for combustion must
be drawn from an area free of dust and contaminants.
- Vertical between air-inlet and exhaust vent: The exhaust must
be a minimum of 12 in. (305mm) above the air-inlet, and the
air-inlet must always be a minimum of 12 in. (305mm) plus
allowance above any surface that will support snow. (Two
feet plus snow allowance is highly recommended). Consult
your weather office for the maximum typical snowfall for your
region.
- Horizontal between air-inlet and exhaust vent: The horizontal
distance between the inlet and exhaust must be a minimum
of 4” [102 mm] center to center.
- Wall Flashing: Under normal operating conditions this boiler
will produce a plume of white gases, and should be taken
into consideration when selecting an adequate location.
A
stainless, plastic, or vinyl shield can be used to flash the
exterior of the residence.
- Flue Gas Hazard: Position the vent termination where vapors
cannot make accidental contact with people and pets or
damage nearby shrubs and plants.
- Elbow Extensions: Elbows on outside of wall must be no
more than ½ in. away from the wall.
- Vent Sloping: All indoor exhaust piping must be on a
slope back to the boiler a minimum of ¼ in. per linear
foot (21 mm/m) of vent. For applications where excessive
condensation is possible ½ in. per linear foot (42 mm/m)
is recommended. The venting system shall be installed
so as to prevent accumulation of condensate and,
where necessary, have means provided for drainage of
condensate.
- Vent screens: It is recommended to install a vent screen or
vent termination approved by the vent manufacturer as the
last venting component of the vent system (both inlet and
exhaust vent) to prevent undesired objects (ie. birds, rodents,
debris) from entering the vent system.
- Vent Supports: Where required Vent and Air-inlet piping
shall be secured to the wall for more rigidity. All interior
vent pipe shall have a minimum support distance given
per vent manufacturer’s instructions. In the absence of
such instructions than a minimum support distance of
36” (914 mm) shall be maintained. The vent and air-
inlet piping shall be supported at every connection. The
vent and air-inlet piping shall be supported at every
fitting.
Horizontal portions of the venting shall be supported to
prevent sagging.
9
WARNING:
Failure to provide adequate support may result
in substantial property damage, severe personal inju
ry or
death.
NOTE:
the framing in walls and roofs that the vent will
penetrate through shall be constructed to provide for support
and attachment of termination assemblies.
- Roof Exhaust: In all roof applications the discharge must
point away from the pitch of the roof.
- Roof Flashing: Install adequate flashing where the pipe
enters the roof, to prevent water leakage.
- Rain Cap: Install and seal a rain cap over existing chimney
openings, in vacant chimney applications.
- Venting Below Grade: For installations that exit the wall
below grade refer to figure below.
Air-inlet
Exhaust
Wall Brackets
For installations that exit the wall below grade:
1. Excavate site to a point below where the pipes are to exit
as shown.
2. Ensure the wall is fully sealed where the pipes penetrate.
3. The Vent/Air-inlet piping MUST be secured to the side of
the building above grade, as shown, to provide rigidity.
4. Only use wall brackets approved for outdoor use and
by the vent manufacturer for securing the air-inlet and
vent exhaust pipes to the wall.
9
WARNING:
Failure to provide adequate support may result
in substantial property damage, severe personal inju
ry or
death.
5. Ensure that the Vent/Air-in
let clearances are maintai-
ned, see Section 5.0 for details.
9
WARNING:
Condensate Hazard: Do not locate vent
over public walkways, driveways or parking lots.
Condensate could drip and freeze resulting in a slip
hazard or damage to vehicles and machinery.
- Wall Thickness:
Direct vent terminations are designed
to work with any standard wall thickness. Installation
guidelines for min/max wall thickness are as follows:
Min. = 1 in., Max. = 36 in.
- Plastic Venting: Plastic venting systems shall not pass through
a fire wall without a sufficient fire stop that complies with the
local code having jurisdiction for plastic venting.
- Metal Venting Systems: Except for installation in single-and
two-family dwellings, metal venting systems which extend
through any storey above that on which the connected
appliance is located are to be provided with enclosures
having a fire resistance rating equal to or greater than that of
the floor or roof assemblies through which they pass.
Summary of Contents for Family PRO 42 IS
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