Double Deck J4PG4 Installation Manual

A unit with electric heaters with an inlet or outlet duct that penetrates the building structure supporting the unit shall be provided
with a mounting base of noncombustible material so designed that, after the unit is installed, there will be no open passages
through the supporting structure that would permit flame or hot gases from a fire originating in the space below the supporting
structure to travel to the space above that structure. If the unit is intended to be installed on a supporting structure of combustible
material, the base shall be so designed that the required clearance will be maintained between the supporting structure and the
unit, plenum, and attached duct. Spacers necessary to provide required clearances shall be attached to the unit mounting base,
and shall extend not less than 76 mm (3 in.) below the upper surface of the supporting structure, except that, in a unit designed
for use only in a mobile home, the distance shall be not less than 19 mm (3/4 in.).
NOTE
Fig. 3-2 Typical Installations
Condensate drain into roof drain
if required by local codes
Condensate drain into
roof drain if required by
local codes
Condensate drain
into roof drain if
required by local
codes
Branch circuit
disconnect
Branch
circuit
disconnect
Branch circuit
disconnect
Power supply
conduit
Union
Union
Gas shut-off valve
Gas shut-off valve
Gas shut-off valve
Trap
Gas supply
Slab
floot
Gas shut-off valve
Gas supply
Trap
Service access panels
Do not block access
Service access
panels
Do not block
access
Service access panels
Do not block access
Service access panels
Do not block access
Supply
plenum
Supply
plenum
Union
Branch circuit
disconnect
Union
Filter grill
Supply duct at
closet ceiling
15
Trap
* The above figure for reference purpose only.