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GAS-FIRED BOILER Boiler Manual
b. Non Foam Core CPVC (Chlorinated
Polyvinyl Chloride) Pipe conforming to
ASTM D-1785.
c. Non Foam Core ABS (Acrylonitrile-
Butadiene- Styrene) Pipe conforming to
ASTM D3965 Class 3-2-2-2-2.
2. Cellular foam core piping may be used on air
inlet piping only. Never use cellular foam core
material for exhaust vent piping.
D. EXHAUST VENT AND INTAKE AIR VENT
PIPE LOCATION
1. Determine exhaust vent location:
a. The vent piping for this boiler is approved
for zero clearance to combustible
construction.
b. See illustration within this section of
clearances 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 exhaust above the
expected snow accumulation level. Snow
removal may be necessary to maintain
clearance.
A. INSTALLING EXHAUST VENT AND
INTAKE AIR VENT
B. GENERAL
1. Install the boiler venting system in
accordance with these instructions and with
the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, CAN/CGA B149, and/or
applicable provisions 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
C. APPROVED MATERIALS FOR EXHAUST
VENT AND INTAKE AIR VENT
1. Use only Non Foam Core venting material.
The following materials are approved for use
as vent pipe for this boiler:
a. Non Foam Core PVC (Polyvinyl Chloride)
Pipe conforming to ASTM D-1785.
PART 7: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL
DANGER
Munchkin Boiler must be vented as detailed in
Venting section Part 7. Ensure the exhaust and
intake piping comply with these instructions
regarding vent system.
Inspect finished combustion air intake and
exhaust piping thoroughly to ensure all joints
are well secured and airtight and comply with
all applicable code requirements, as well as
with the instructions provided in this manual.
Failure to provide a properly installed vent
system will cause severe personal injury or
death.
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.
Follow the venting instructions below carefully.
Failure to do so may result in severe personal
injury, death, or substantial property damage.
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.
WARNING
Both exhaust and intake air vents must exit
from the same side of the building to assure
correct appliance operation.