TM 10-4520-262-12&P 0005 00
Installing Debris Grills in Air Supply and Return Ducts. When the heater is shipped initially, the debris
grills (1, 2) are not installed in the end of the air supply (3) or air return (4) ducts but must be installed
before the heater can be used. To install the debris grill in the air supply duct (3), inspect the interior of
each duct and note that one end of the duct has a green lining and the other end has a silver lining as
described in the previous section entitled General.
Install a debris grill (2) (with the grill facing out) into the silver lining end of one of the ducts. Secure the
debris grill in the end of the duct with the strap (5) at the end of the duct. This duct will be the air supply
duct (3) that carries cool air from the tent into the breathable air inlet end of the heater.
Install a debris grill (1) (with the grill facing out) into the green lining end of the remaining duct (4). Secure
the debris grill in the end of the duct with the strap (6) located at the end of the duct. This duct will be the
air return duct (4) that carries heated air from the heated air outlet end of the heater and into the tent.