John Wood Noritz Condensing - N-0841MC - Manuel (Page 14)

14
WARNING
CARBON MONOXIDE POISONING
Failure to properly seal the vent system could
cause flue products to enter the living space.
Venting With Alternate Materials
The use of venting materials approved for Category IV appliances is suggested whenever possible.
However, this appliance may also be vented with non cellular foam core plastic pipe materials as
specified in the below table. Vent installations in Canada which utilize plastic vent systems must comply
with ULC S636.
Item Material United States Canada
Exhaust Vent
Schedule 40 PVC ANSI/ASTM D1785
ULC S636 Certified
Materials Only
PVC-DWV ANSI/ASTM D2665
Schedule 40 CPVC ANSI/ASTM F441
Pipe Cement/Primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
Note: Do Not Use Cellular Foam Core Pipe
PVC/CPVC Installation Instructions
• Use only solid PVC or CPVC schedule 40 pipe. Cellular foam core piping is not allowed.
•
•
In Canada, plastic vent systems must be certified to ULC S636. The components of the certified
vent system must not be interchanged with other vent systems or unlisted pipe/fittings.
• In Canada, specified primers and glues of the ULC S636 certified vent system must be from a
single system manufacturer and not intermixed with other system manufacturer’s vent system
parts.
• Follow all general venting guidelines as outlined on pages 12 and 15 of this Installation Manual.
• The pipe shall be installed so that the first 0.9m (3') of pipe from the appliance flue outlet is readily
accessible for visual inspection.
• When preparing and assembling the pipe, follow instructions as provided by the pipe
manufacturer. In general, the following practices must be observed:
o Squarely cut all pieces of pipe.
o Remove all burs and debris from joints and fittings.
o All joints must be properly cleaned, primed, and cemented. Use only cement and primer
approved for use with the pipe material as outlined in the above table.
• All piping must be fully supported. Use pipe hangers at a minimum of 0.9m (3') intervals. Do not use
the water heater to support the vent piping.
• PVC or CPVC pipe has been approved for use on this appliance with zero clearance to combustibles.
75mm (3") PVC or CPVC schedule 40 pipe may also be used on this appliance, however the
BTUH input of the appliance will be reduced by up to 5%. Refer to page 15 for additional instructions.
• When attaching the piping to the water heater, a Noritz PVC/CPVC adapter must be used. This
adapter is not supplied with the water heater and must be purchased separately (part #VP4-ADAPT-PVC,
use part #VP4x3-ADAPT-PVC when using 75mm (3") PVC or CPVC). It is not necessary to use cement
or silicone on this adapter as it is self-sealing.
• A bird screen must be installed on the vent termination to prevent debris or animals from entering
the piping. This screen is not supplied with the water heater and must be purchased separately
(part #VT4-PVCS, use part #VT3-PVCS when using 75mm (3") PVC or CPVC).