MACH® Series
Gas-Fired Boiler
Installation
Page 12
3.6.9 Intake Duct Materials and Sizes:
Material: PVC, CPVC (Schedule 40), single wall
galvanized steel, or other suitable materials.
The intake duct must be sized for a maximum pressure
drop of 0.22 inches W.C., at 100 SCFM (MACH®
450) or 70 SCFM (MACH® 300).
The installation of a bird screen on the intake
termination is recommended.
3.6.10 Sealing the Intake Duct
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
galvanized duct, wrap each joint and seam with
adhesive aluminum tape.
3.6.11 Intake Duct Connection to Boiler
Connect the air supply duct to the collar on the back of
the boiler. Fasten the duct to the collar with sheet
metal screws at 90º angles. Wrap the joint with
adhesive aluminum tape.
3.6.12 Intake Duct Terminations
The roof intake termination must be an
unrestrictive type, as shown above.
Intake Termination Details
Roof
Round
90° Elbow
Sidewall
Round
Air Inlet
(tee mounted
horizontally)
No rain cap -
Unrestricted
Field Provided
Inlet Screens
Recommended
Termination
Centering
Support Plate
Sealant
Outside Plate
Cover Plate
Fastener
Sealant
12" min.
Содержание MACH Series
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Страница 42: ...MACH Series Gas Fired Boiler Parts and Technical Support Page 38 6 1 2 Wiring Series C 300...
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Страница 53: ...MACH Series Gas Fired Boiler Appendix Page 49 8 0 APPENDIX Date Hi Low Fire O2 CO CO2 Stack Temp Action By...