Nordyne E3 user service Preparing Floor Openings, Installing Duct Connector, Floor Cavity Sizes

Preparing Floor Opening(s)

1.Mark fl oor opening(s) as shown in Figure 6. Provide minimum clearances at rear and right side walls of closet or alcove for installation of furnace and wiring.

2.Cut floor opening on outside edge of marked line so that opening is slightly larger than area marked.

3.Additional provisions may be necessary for optional air conditioning or heat pump if refrigerant lines are installed elsewhere than at the front of the furnace.

4.The refrigerant and entrance supply opening dimensions may be adjusted ± 1/2”.

Installing Duct Connector

NOTE: The duct connector is designed for use on ducts down to 12” wide. On typical ducts, the fi nger tab duct connector may be installed using Method B. On narrow ducts, there may be insuffi cient clearance to bend the tabs on two sides of the fi nger tab duct connector. In such

		If "X"		Use Duct Connector
	floor cavity is:			Model Part Number
English			Metric	Finger	Screw
			(mm)	Tab	Down
7/8"			22	901987	904008
	2"		51	901988	904009
4	1/4"		108	901989	904010
6	1/4"		159	901990	904011
8	1/4"		210	901991	904012
10 1/4"			260	901992	904013
12 1/4"			311	901993	904014

Table 4. Floor Cavity Sizes

cases, use Method C or D. For screw down duct connector use method E. For Platinum models always use method A.

Method A - Platinum Series

NOTE: Flex duct used must have a minimum temperature rating of 200° F and meet all other applicable codes and standards.

1.Place duct connector through opening in fl oor. See Figure 9.

2.Connect 14” supply duct.

	REAR WALL OF ENCLOSURE
		Center Line
2-3/8" MIN
(60 mm)
				Furnace
		14-1/2"		Outline
		(368 mm)
17"			14-1/2"
(432 mm)
			(368 mm)
				16-5/8"
23-3/4"
				(422 mm)
(603 mm)
	Optional Supply Wire
	Entrance
3-3/4"		A/C Or HP		3" (76 mm)
	(Not required
		Optional
(95 mm)
	for Platinum)
		Refrigerant
		Line
3/4"	4-1/4"	5"	3-3/8"
(19 mm)
	(108 mm)	(127 mm)	(86 mm)
Furnace Outer		10"		6-1/4"
Door	(254 mm)		20"	(159 mm)
		(508 mm)

Figure 6. Downflow Floor Cutout Locations (nominal dimensions)

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