Dometic DF Serie Instructions D'installation page 10

PRE-INSTALLATION
Air Discharge Configuration Examples
The following figures offer a visual representation of the detailed discharge requirements outlined in the "Air Discharge
Requirements" tables on page 11 and page 12 . These examples show vertical and horizontal installations, using different
Furnace models and ducting options .
FIG. 1
Register
(Top View)
Hard Ducting
• Horizontal Furnace – Bottom exit into hard ducting
FIG. 3
(Top View)
Medium or Large
Furnace Only
Hard Ducting
• 4" flex ducts into hard ducting
For medium and large Furnaces: ducts 8 and 9 are used for
additional ducting only, and are not used to calculate the
required discharge area shown at the bottom of page 11 .
FIG. 5
Small
Furnace
Only
Interior Grill
5" Flex
Ducting Cabinet Cutout
Location
(Top View)
• 5" ducting over 12" long must have an additional 4" duct
added to the system .
To aid in the removal of the Furnace through the grill
cutout for servicing, when using a front interior grill, orient
the grill to the direction of the Furnace: horizontal if the
Furnace is horizontal, vertical if the Furnace is vertical .
Medium or
Large Furnace
Register
4" Flex
Ducting
Register
Register
FIG. 2
Register
(Top View)
• Vertical Furnace – Bottom exit into hard ducting
FIG. 4
Duct 4
Duct 3
(Top View)
Small, Medium,
or Large Furnace
(Vertical Mount)
4" Flex Ducting
• Make sure to use at least the minimum number of 4" flex
ducts required for your model size . See "Air Discharge
Requirements" on page 11 and page 12 .
10
Medium or
Large Furnace
Hard Ducting
Register
Duct 5
Duct 4
Duct 5
(Top View)
Small, Medium, or
Large Furnace
(Horizontal Mount)
Duct 3
4" Flex Ducting