Kees DFG (DIRECT FIRED GAS) MAKE-UP AIR UNITS - Manual (Page 2)

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INSTALLATION INSTRUCTIONS
Description of Operation
The KEES DFG series heater is a direct gas fired heater using 100% outside air. It is
designed for outdoor installation but may be mounted indoors provided the intake is
ducted to the outdoors. Natural gas or propane fuel the burner. The flame is modulated
to provide a constant preset discharge temperature or room temperature (optional). In
areas where freeze-ups may occur, it is recommended that a low temperature limit be
installed to protect the indoor space in the event of a burner shutdown.
Receiving the Unit
Upon receipt of the unit, carefully inspect it for any visible damage. Each unit is
inspected prior to shipment. If any damage is found, immediately notify the carrier and
file a claim with that carrier. Also, verify that the items shown on the packing list were
received and that they agree with what was ordered. Notify KEES, Inc. of any
discrepancies. Prior written permission must be obtained before any merchandise may
be returned.
Positioning the Unit
When determining the location for the roof curb, minimum clearances to combustible
materials must be maintained. Shown below are the tested minimum clearances. Local
codes prevail, however, if greater clearances are required. The intake of the unit should
not be placed in the direction of prevailing winds if at all possible. Make sure the top of
the curb is level so that a good seal can be made to the heater. Once the curb is set in
place, the roofing material can be finished around it.
Minimum Clearances to Combustibles
Service side or top ----------24.0 inches
All other sides ----------------0.0 inches
Curbing the Unit
The discharge of the unit, which is underneath the blower section, must be placed over
the roof curb. The other end of the unit rests on the support rail. Note: the standard
roof curb height is twelve (12) inches. In areas with heavy snowfall, a greater height
may be required.