Dettson Chinook C45-1-X Serie Instructions D'installation Et Manuel Du Propriétaire page 20

7.4 SPECIAL VENTING
REQUIREMENTS FOR
INSTALLATION IN CANADA
In Canada, S636 certified primers and cements must
be used and be of the same manufacturer of the S636
venting system. Do not mix primers and cements from
one manufacturer with a vent system from a different
manufacturer. Follow the manufacturer's instructions for
the use of primer and cement and never use primer or
cement beyond its expiration date.
All fire stop and roof flashing used with this system must
be UL listed material.
Acceptability under Canadian standard CAN/CSA B149
requires full compliance with all installation instructions.
The authority having
authority, municipal building department, fire department,
etc.) should be consulted before installation to determine
the need to obtain a permit.
7.5 MATERIAL
USA:
Combustion air and vent pipe, fittings, primers and
solvents must conform to American National Standard
Institute (ANSI) and American Society for Testing and
Material (ASTM) and be of the same manufacturer. See
table 7
Table 7 – Approved Vent and Combustion air pipe
material USA installation
Material
PVC - DWV
PVC schedule 40
CPVC Schedule 40
SDR-21, SDR-26-26 PVC
ABS-DWV Schedule 40
Stainless steel (SS)
Polypropylene (PP)
All vent piping and combustion air piping MUST
conform to local and national codes.
Pipe cement must be PVC (ANSI/ASTM D2564) or
CPVC (ANSI/ASTM F493).
Primers must be PVC/CPVC (ANSI/ASTM F656).
CANADA:
Vent pipe installations in Canada must conform to
the requirements of CAN/CSA B149 code. PVC and
CPVC vent systems must be composed of pipe, fittings,
cements, and primers listed to ULC S636 and must be of
the same manufacturer.
jurisdiction (gas inspection
Standards
ANSI/ASTM D2265
ANSI/ASTM D1785
ANSI/ASTM F441
ANSI/ASTM D2241
ANSI/ASTM D2661
UL-1738
UL-1738 and ULC-
S636
Combustion air pipe can use ABS material meeting the
ASTM standard D2661 / CSA B181.1.
All vent piping and combustion air piping MUST conform
to local and national codes.
7.6 SIZE THE VENT AND
COMBUSTION AIR PIPES
Furnace combustion air and vent pipe connections are
sized for 2" pipe. Any pipe diameter change should be
made outside furnace casing in a vertical section of the
pipe. Any change in diameter to the pipe must be made
as close to the furnace as reasonably possible.
The maximum allowable vent length for the vent and
combustion air pipe (when used) is listed in table 8 and
depends on the furnace input. The maximum length
must include straight pipe and any fitting and termination.
Equivalent length of various fitting is list in table 9.
A minimum linear length of 5 ft must be respected.
To properly measure the Equivalent Vent Length :
1. Measure the linear pipe distance from the furnace
to the termination for each pipe.
2. Count the number of elbows for each pipe.
3. For each pipe, multiply the number of elbows by the
equivalent length for the type of elbow used (see
table 9). Record the equivalent length of all the
elbows for each pipe.
4. Record the equivalent length of the termination
used (see table 9 ).
5. Add the equivalent length of the elbows and
termination to the linear distance measured for
each pipe.
6. If the calculated vent length is greater than the
maximum allowed vent length (for either vent pipe
or combustion air pipe), consider modifying the
termination location or use a greater pipe diameter.
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