TM-9-2540-207-14-P
HEATER, VEHICULAR COMPARTMENT, MODEL: A20
TECHNICAL MANUAL; OPERATOR, FIELD, AND SUSTAINMENT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2007
TM-9-2540-207-14-P - Page 65 of 288
TM 9-2540-207-14&P
5-21
Vent Fan Assembly Design Iteration 3 (Continued)
5.6.1.2.2 Installation
Note:
The larger end of the Combustion Air duct is permanently secured to
the Vent Fan Assembly housing with Loctite
770 primer and Loctite 401.
These materials are used to seal the Combustion Air Duct to the Vent Fan
Assembly.
1.
Clean any loose, residual sealant on the inside surface of the combustion air duct.
2.
Clean the outside surface and front edge of the Combustion Air Inlet by removing any
old sealant, and then coat with Silicone RTV to provide a seal for the Combustion Air
Duct.
Figure 5.6-8 Combustion Air Duct and Inlet Sealant Application
Note:
The ends of the Combustion Air Duct must be sealed to the Vent Fan
Assembly and to the Top Housing.
3.
Engage the Vent Fan Assembly onto the Burner Housing Assembly ensuring that the
motor frame sits correctly over the Burner Housing, and that the Combustion Air Duct is
aligned with the Top Housing air inlet. DO NOT use excessive force.
Clean loose, residual
sealant from inside of
combustion air duct
Clean all residual sealant
from surface of
combustion air inlet
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