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Venting continued-
Vent pipes serving power vented appliances are classified by building codes as
"vent connectors". Required clearances from combustible materials must be
provided in accordance with information in this manual under LOCATION OF
WATER HEATER and CLEARANCES, and with National Fuel Gas Code and
local codes.
Clearance to combustibles for all venting pipes
For installations in the US
0" minimum
DO NOT use the placement of insulation or other materials in the required clearance
spaces surrounding the venting to combustible material unless otherwise specified.
Risk of carbon monoxide poisoning or fire due to joint separation
or pipe breakage.
This water heater must be properly vented and connected to an
approved vent system in good condition. DO NOT operate water heater
with the absence of an approved vent system. A clean and unobstructed
vent system is necessary to allow noxious fumes that could cause injury
or loss of life to vent safely and will contribute toward maintaining the
water heater's efficiency. The acceptance of the venting system is
dependent upon full compliance with these installation instructions.
Venting system must not pass through rated fire separations.
The venting system must be free to expand and contract. This venting
system must be supported in accordance with these instructions.
For installations in Canada, field supplied vent piping must comply with
CAN/CGA B149.1 (latest edition) and be certified to the Standard For Type
BH, Class II, 65°C, Gas Venting Systems, ULC S636. Components of this
listed system shall not be interchanged with other vent systems or unlisted
pipe/fittings. All components and specified primers and cements of the
certified vent system must be from a single system manufacturer and not
intermixed with other system manufacturer's vent system parts. The
supplied vent connector and vent termination are certified under ULC S636
and are also certified as part of the water heater. Refer to the following
tables for approved venting materials, primers, and cements. All approved
primers and cements are to be used within their marked time limitations.
and terminals
Refer to vent pipe and terminal
manufacturer's installation instructions
WARNING
NOTICE
10
For installations in Canada
for clearances to combustibles
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