Nordyne SERIES M1B Manuel D’Utilisation

10

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). 
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).

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.

DUCT CONNECTOR

SUPPLY 

AIR DUCT

BEND TABS TIGHTLY 

AGAINST SUPPLY AIR DUCT

Narrow

Duct

Narrow

Duct

Duct connector tabs

Staples or sheet metal screws 

Duct 
Flap

Narrow  

Duct

Duct

Connector

Sheet metal 

screws 

Round Duct Connector Installation
1. Apply a bead of caulking, mastic, or other 

approved sealant around bottom side of 
connector.

2. Install and center the duct connector in the 

fl oor opening.

3. Install the mounting plate under the back side 

of the duct connector. See Figure 13 (page 11). 
NOTE: Align the screw holes in both 
components.

4. Secure the duct connector and the mounting 

plate to the wood fl oor with appropriate size 
screws.

5. Connect the round supply duct to the underside 

of the duct connector and secure them with 
fi eld supplied sheet metal screws.

6. 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.

Supply 

Air Duct

F

old Flap Here

F

old Flap Here

Remove 

this

Flap

Remove 

this

Flap

Cut Here

Cut Here

Cut Here

Cut Here

Cut Here

Cut Here

Cut Here

Cut Here

Cut Here

F

old Flap Here

F

old Flap Here

Installing The  Furnace
Sides and back of the furnace may be enclosed 
by wall framing such as in a closet or alcove. The 
dimensions of the room or alcove must be able 
to accommodate the overall size of the furnace 
and the installation clearances outlined on page 
2 and Figures 1 - 4 (page 6). The furnace shall 
be appropriately connected to the supply and 
return air distribution system as shown in Figures 
14 & 15 (page 11).

1. Remove furnace outer door(s) and bottom fuel 

line knockout.

2. Place furnace onto duct connector and center 

with fl oor opening.

3. Slide onto mounting plate. (Bottom rear slots 

on furnace should engage with mounting plate 
tabs.)

4. Secure front with one (1) fastener at each 

corner (Figures 14 or 15).

NOTE: Additional fasteners may be used at rear, 
sides or through door frame, as desired, to secure 
furnace to closet or alcove framing.