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| 20" |
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| 14 1/2" |
| 2 3/4" | |
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| C |
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| L |
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| REAR WALL OF CLOSET OR ALCOVE |
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| 2 1/4" |
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| FLOOR |
| C |
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| FOR STANDARD |
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| L |
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| 231/4" 3/4"21 | 1/2"14 | DUCT CONNECTORS |
| 10" |
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24" | OUTLINEFURNACE |
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| C | C | C | 1 3/4" |
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| OPTIONAL | L |
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| L | L | COOLING COIL |
| 3/4" |
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C |
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| C |
L |
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| L |
| 1 3/4" |
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| ALT |
| FUEL | 2" | |
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| 3/4" |
| ENTRY 1 1/4" Dia. | ||||
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| LINE |
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| 1 7/8" |
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| FURNACE |
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| OUTER |
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| 2 7/8" |
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| DOOR |
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Figure 6. Cut-Out Dimensions for
Standard Duct Connectors
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| 20" |
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| C |
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| L |
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| 10" |
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| REAR WALL OF CLOSET OR ALCOVE |
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| FLOOR |
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| C |
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| ROUND DUCT | L |
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24" | 1/4"23 | 3/4"21 | FURNACEOUTLINE |
| 10" |
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(14 1/4” DIAMETER) |
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| 1 3/4" |
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| C | C | C |
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| L |
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| L | L | OPTIONAL | 3/4" | |
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| COOLING COIL |
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| C |
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| C |
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| L |
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| L |
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| 1 3/4" |
| ALT | FUEL | 2" | ||
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| 3/4" |
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| ENTRY 1 1/4" Dia. | LINE |
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| 1 7/8" |
| FURNACE |
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| 2 7/8" |
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| OUTER |
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| DOOR |
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Figure 7. Cut-Out Dimensions for
Round Duct Connectors
Hole for | Floor |
| Bend tabs |
| up 90° | ||
Gas Line | Wood |
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| Connector |
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| Tabs |
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| Mounting Plate |
Duct |
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Connector |
| Supply | |
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| Air | Duct |
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Figure 8. Standard Duct Connector In-
stalled
FLOOR OPENING
| “X” |
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| SUPPLY AIR DUCT |
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FLOOR |
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CAVITY |
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| Figure 9. Floor Cavity |
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If Floor Cavity | Duct Connector | |||||||||
Type & Part Number | ||||||||||
| “X” is: | |||||||||
| Standard Duct |
| Round Duct | |||||||
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| |||||
| 7/8” / (22) | 901987A |
| 904008 | ||||||
| 2” / (51) | 901988A |
| 904009 | ||||||
901989A |
| 904010 | ||||||||
901990A |
| 904011 | ||||||||
901991A |
| 904012 | ||||||||
901992A |
| 904013 | ||||||||
901993A |
| 904014 | ||||||||
Note: Dimensions shown as Inches / (Millimeter)
Table 3. Duct Connector Sizes
Standard Duct Connector Installation
The standard duct connector is designed for use on ducts 12” in width. However ducts narrower than 12” may not allow suffi cient clearances for this type of installation. For an alternate installation method, see page 10.
1.Center the duct connector in the fl oor opening with bottom tabs resting on top of the supply air duct.
2.Mark the
3.Remove the duct connector and cut out the marked area of the supply air duct 1/4” larger the actual cutout drawn.
4.Install the duct connector back in the fl oor opening with the bottom tabs extending into the supply air duct.
5.Install the mounting plate (Figure 8) under the back side of the duct connector. Align the screw holes in both components.
6.Secure the duct connector and the mounting plate to the wood fl oor with appropriate size screws.
7.Bend the connector tabs on the bottom of the duct connector upwards and as tight as possible against the supply air duct.
8.Bend both tabs on the mounting plate up 90°. See Figure 10, (page 10)
9.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.
9