Dometic DF Serie Instructions D'installation page 13

PRE-INSTALLATION
Installing The Floor Discharge System
Read BEFORE proceeding:
• Each 4" duct opening provides 12 in .
noncloseable duct discharge area . Make sure that all clearances and temperature requirements are met and the seal is
airtight .
• Ducting into dead-air space with no return air, such as holding tank areas, does not count toward achieving minimum
discharge requirements .
• 2" ducts exiting into the return-air space count as part of the minimum discharge area and minimum CFM .
• As applicable, the medium and large Furnace can be installed as a bottom-discharge system in either a horizontal or
vertical position .
STEP 1
Horizontal
Bottom
Discharge
Plenum
• Cut the opening for the floor discharge system in the floor of the RV .
• Standard Door: see "Standard Door Floor Discharge Installations" on page 14 .
• Flush Door: see "Flush Door Floor Discharge Installations" on page 14 .
• Small Vent: see "Small Vent Floor Discharge Installations" on page 14 .
• Remove the bottom discharge plate or side .
• Fasten the plenum plate bend tabs over the floor cutout .
• Place the gasket on the plenum around the floor opening .
Plenum plates and gaskets are available for purchase through Dometic . If not using a Dometic gasket and plenum plate, seal the
Furnace to the hard ducting system using an approved foil tape, or use a gasket that has a 300° F minimum temperature rating
and a UL94-V0 rating .
Vertical Mount Furnace: Kit 30205
Horizontal Mount Furnace: Kit 30261
of discharge area . For each closeable register, provide an extra 12 in .
2
Vertical
Bottom
Discharge
Plenum
13
of
2