3.0
Installation
- GTD Series Installation, Operation, Maintenance and Parts Manual
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100mm 6100mm
100mm.(single)/150mm.(dual) 6100mm
130mm 9140mm
100mm.(single)/200mm.(dual) 9145mm
150mm 12200mm
Air Intake Cap
Air Intake Duct Size Max. Intake Length
Duct Size
Max. Intake Length
Burner Control Box
Single Heater Intake Dual Heater Intake
Consult factory for longer intake lengths.
Guidelines:
Limitations for length and size of combustion air intake duct
Combustion Air Requirements
General Requirements
:
• No more than two 90 degree elbows are allowed.
• Allow for expansion. Use a 100mm diameter flexible hose to connect the duct to the burner control
box.
• In humid environments, use insulated duct, PVC pipe or DWV (drain waste vent) to prevent
condensation on the outer surface.
• Do not draw combustion air from attic space or other negatively pressured areas.
• A factory approved wall intake cap (P/N: WIV-4) must be used with horizontal outside air intake
ducts. The wall intake cap must be installed to prevent blockage. Locate the intake where dirt, steam,
snow, etc. will not contaminate or clog the intake screen.
• Separate air intake duct from flue pipe a minimum of 100mm. Also, place pipe higher than
adjacent air intake duct.
Figure 3.28
•
Wall Intake Cap
