Alternate Attachment Method - Nordyne M1MB 056 Installation Instructions Manual

20"
14 1/2"
C L
REAR WALL OF CLOSET OR ALCOVE
2 1/4"
FLOOR CUT-OUT
FOR STANDARD
DUCT CONNECTORS
CUT-OUT FOR
OPTIONAL
C L
C L
COOLING COIL
C L
1 3/4"
ALT FUEL-LINE
ENTRY 1 1/4" Dia.
3/4"
1 7/8"
2 7/8"
Figure 6. Cut-Out Dimensions for
Standard Duct Connectors
20"
C L
REAR WALL OF CLOSET OR ALCOVE
CUT-OUT FOR
C L C L
OPTIONAL
COOLING COIL
C L
1 3/4"
ALT FUEL-LINE
ENTRY 1 1/4" Dia.
3/4"
1 7/8"
2 7/8"
Figure 7. Cut-Out Dimensions for
Round Duct Connectors
Hole for
Gas Line
Duct
Connector
Figure 8. Standard Duct Connector Installed
2 3/4"
C L
1 3/4"
C L
3/4"
C L
2"
FUEL
LINE
FURNACE
OUTER
DOOR
10"
C L
1 3/4"
C L
3/4"
C L
FUEL 2"
LINE
FURNACE
OUTER
DOOR
Bend tabs
up 90°
Mounting Plate
"X"
SUPPLY AIR DUCT
FLOOR
CAVITY
Figure 9. Floor Cavity
If Floor Cavity
"X" is:
Standard Duct
7/8" / (22) 901987A
2" / (51) 901988A
4-1/4" / (108) 901989A
6-1/4" / (159) 901990A
8-1/4" / (210) 901991A
10-1/4" / (260) 901992A
12-1/4" / (311) 901993A
NOTE: Dimensions shown as Inches / (Millimeter)
Table 3. Duct Connector Sizes

Alternate Attachment Method

The standard duct connector is designed for use on ducts
12" in width. However if there is insuffi cient clearance to
bend the duct connector tabs, this alternate attachment
method may be used.
1. Score and cut the top of the supply air duct as indicated
in Option 1 or Option 2 (Figure 11, page 10). With Option
1 choice, cut out the metal from the shaded area.
2. Fold the two fl aps (Options 1 or 2) up to form the opening
for the duct connector.
3. Install the duct connector with the bottom tabs extending
into the supply air duct.
4. Bend the tabs on the bottom of the duct connector
upwards and as tight as possible against the supply
air duct (Figure 12, page 10).
5. Form the fl aps (Options 1 or 2) up against the duct
connector as tight as possible.
6. Secure the duct connector fl aps to the supply air duct
with staples (3 minimum) or if a 2x block/joist is not
provided, use sheet metal screws (2 minimum).
NOTE: The duct connector tabs may be attached to
the air duct with sheet metal screws or other suitable
fasteners as long as the duct connector and the air duct
are securely attached.
7. Seal all connections with industrial grade sealing tape
or liquid sealant.
NOTE: Requirements for sealing ductwork vary
from region to region. Consult with local codes for
requirements specifi c to your area.
FLOOR OPENING
Duct Connector
Type & Part Number
Round Duct
904008
904009
904010
904011
904012
904013
904014
9