Harsco Industrial MACH C1500GG Installation & Owner's Manual page 22

3.5.5.1 Intake Duct Materials and Sizes
Air Requirements – SCFM
Boiler Size
C1500GG
C2000GG
galvanized duct, wrap each joint and seam with adhesive aluminum tape or other sealant. The installation of a
birdscreen on the intake termination is recommended. Ensure that the screen does not become blocked with snow,
ice, insects etc.
3.5.5.2 Intake Duct Connection to Boiler
Connect the air supply duct to the 10" OD collar on the top of the boiler. Fasten the duct to the collar with sheet metal
screws at 90º angles. Seal the joint.
3.5.5.3 Intake/Exhaust Layout
®
The MACH Boilers C1500GG-C2000GG are certified for direct sidewall venting with a sidewall air inlet only.
Both the air inlet and the exhaust vent must terminate on the same wall of the building and must utilize the same type
of termination fitting with the same orientation. Allowable termination fittings are: 90 elbows, tees, or straight vents.
NOTICE! Do not install this boiler with sidewall vent and room air inlet!
The figure shows the sidewall penetration requirements. The exhaust vent must be at least 3 feet above the air
intake. The air intake and exhaust vent must extend at least 12 inches from the exterior wall.
Required SCFM
350
467
36"
12"
The air intake duct can be fabricated from PVC, CPVC, single wall
galvanized steel, or other suitable materials. The duct must be
rigid enough to maintain the full required cross sectional area
under all operating conditions. Proper sealing of the intake
ductwork is necessary to prevent infiltration of air from conditioned
space. Joints in PVC or CPVC must be cemented. For
Typical Sidewall Venting.
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MACH® Gas-Fired Boiler