Part 4; Venting; General; B Approved Venting Materials For Exhaust Vent And Intake Air Pipe - Heat Transfer Munchkin VWH User Manual

PART 4. VENTING
A. GENERAL
1. Install the boiler venting system in accor-
dance with these instructions and with the
National Fuel Gas Code, ANSI Z223.1/NFPA
54, CAN/CGA B149, and/or applicable provi-
sions of local building codes.
2. This boiler is a direct vent appliance and is
listed as a Category IV appliance with
Underwriters Laboratories, Inc. VENT AND
INTAKE AIR PIPE
n
WARNING
This vent system will operate with a positive
pressure in the pipe. Do not connect vent
connectors serving appliances vented by natural
draft into any portion of mechanical draft systems
operating under positive pressure.
n
WARNING
Follow these venting instructions carefully. Failure
to do so may result in severe personal injury, death,
or substantial property damage.
B. APPROVED MATERIALS FOR EXHAUST
VENT AND INTAKE AIR PIPE
1. Use only Non Foam Core venting material.
The following materials are approved for use
as vent pipe for this boiler:
NOTICE
Use materials approved by the authority having
jurisdiction. In the absence of other authority, PVC
and CPVC pipe must comply with ASTM.
When installing a condensate pump, select one
approved for use with condensing boilers and
furnaces. The pump should have an overflow switch
to prevent property damage from condensate
spillage.
Condensate from the Munchkin VWH Boiler will be
slightly acidic (typically with a pH from 3.2 to 4.5).
Install a neutralizing filter if required by local codes.
12
APPROVED VENTING MATERIAL
Item Material
United States
PVC schedule
ANSI/ASTM D1785
40/80
Vent or
air pipe
PVC-DWV ANSI/ASTM D2665
and
fittings
CPVC schedule
ANSI/ASTM F441
40/80
Pipe
PVC ANSI/ASTM D2564 IPEX System 636
cement/
CPVC ANSI/ASTM F493
primer
n
WARNING
Do not use Foam Core Pipe in any portion of the
exhaust piping from this boiler. Use of Foam Core
Pipe may result in severe personal injury, death, or
substantial property damage.
2. Cellular foam core piping may be used on air
inlet piping only. Never use cellular foam core
material for exhaust piping.
C. EXHAUST/VENT / AIR INTAKE PIPE

LOCATION

1. Determine exhaust vent location:
a. The vent piping for this boiler is approved for
zero clearance to combustible construction.
b. See Figure 4.1 for an illustration of clear-
ances for location of exit terminals of direct-
vent venting systems.
c. This boiler vent system shall terminate at
least 3 feet (0.9 m) above any forced air
intake located within 10 ft (3 m). Note: this
does not apply to the combustion air intake
of a direct-vent appliance.
d. Provide a minimum of 1 foot distance from
any door, operable window, or gravity intake
into any building.
e. Provide a minimum of 1 foot clearance from
the bottom of the exit terminal above the
expected snow accumulation level. Snow
removal may be necessary to maintain
clearance.
f. Provide 4 feet horizontal clearance from
electrical meters, gas meters, gas regulators,
and relief equipment. In no case shall the
exit terminal be above or below the afore-
mentioned equipment unless the 4 foot hor-
izontal distance is maintained.
g. Do not locate the exit terminal over public

VENTING

Standards for Installation in:
Canada
CPVC and PVC venting
must be ULC-S636
Certified. IPEX is an
approved manufacturer
in Canada supplying
vent material listed to
ULC-S636
Cements & Primers