Recommended Floor Cut-Out; Duct Connector Depth; Duct Connector Screw Attachment; Duct Connector Tab Attachment - Coleman DGAA Installation Manual

129098-UIM-H-1011
REAR WALL CEILING CUT-OUT
OF ENCLOSURE FOR ROOF JACK
2-3/4 (7,0 cm)
I /
MIN
J. _
FLOOR CUT-OUT
IT • v _/"1 ............ _//"_,'_-- FOR DUCT
" " CONNECTOR
/E I i / i/\
_ , ,
-_l_/'t I I I f-'_ V I 1 FURNACE
_ __/__..__ r I_-1 L_oUTL,NE
i _ OP NAL GAS
! i I v ._1 i / OR ELECTRIC
/
t
I
|
I _ ENTRANCE
2-1/8 (5,4,cm)I,I
I
[_" / jFRONTPANEL
t t (31 '\ _----1"- ---- -- OF FURNACE
_(8.30m:
FUTURE / I_'_'_ 9_-3/4,--I"
z4mcm)z4._ cm) _ FLOOR
I
REFRIGERANT 14 20.--I,
LINE ENTRANCE ' (5O.8 cm)
FIGURE 7: Recommended Floor Cut-out
S FLOOR
II _' II
(" FLOOR
DUCT COpNTNHECTOR [,_ ..................JOIST
u ; u
SUPPLY DUCT
FIGURE 8: Duct Connector Depth
/ LOCATORBRACKET
/
/' ............... NAILS, FLATHEAD SCREWS
]/
OR STAPLES
// J
/ _
/
SCREWS
/ /
............. FLOOR
SUPPLY DUCT
FIGURE 9: Duct Connector Screw Attachment
INSTALLATION OF SCREW ATTACHMENT DUCT
CONNECTOR
1. Make floor cut out as shown in Figure 7.
2. Determine the depth of the floor cavity from the surface of the floor
to the top of the supply air duct and select the appropriate duct
connector from the chart. See Figures 6 and 8.
3. Place locating bracket (supplied with the duct connector) to the
back edge of the floor opening. See Figure 9.
4. Apply a water based duct sealant to the 1!2" supply duct attach-
ment flange of the duct connector.
5. Determine which of the four positions the duct connector best cen-
ters over the supply duct and insert it through the floor cut-out.
6. When properly aligned with the supply duct, secure the duct con-
nector to the floor with nails, flat head screws or staples.
7. Use screws as required to secure the duct connector to the supply
duct.
8. Cut out the opening to the supply duct. If sealant was not used, the
installer should tape the mating flanges to provide a good air seal.
NOTE: Duct sealant and tape must be classified as meeting HUD Stan-
dard 3280.715, U.L. Standard 181A.
If tape is used to provide a better air seal, it should be a type approved
by the applicable national or local codes.
/-- LOCATOR BRACKET
/ NAILS, FLAT HEAD SCREWS
/ / ........... OR STAPLES
/ / BEND TABS UNDER
/ _ _ DUCT OPENING TO
/ /¢ SECURE TO THE
IP" i' SUPPLYDUCT,
FLOOR
SUPPLY DUCT
FIGURE 10: Duct Connector Tab Attachment
INSTALLATION OF TAB ATTACHMENT DUCT
CONNECTORS
1. Make floor cut out as shown in Figure 7.
2. Determine the depth of the floor cavity from the surface of the floor
to the top of the supply air duct and select the appropriate duct
connector from the chart. See Figures 6 and 8.
3. Place locating bracket (supplied with the duct connector) to the
rear of the floor area for the furnace. See Figure 10.
4. Determine which of the four positions the duct connector best cen-
ters over the supply duct and insert it through the floor cut-out.
5. Mark cut-out location on the supply duct and remove the duct con-
nector.
6. Cut out the opening to the supply duct.
7. Bend tabs down through and back up under the supply duct.
8. Secure the duct connector to the floor with nails, flat head screws
or staples.
The duct connector is designed for use on ducts down to 12" in width.
When using the connector on smaller width ducts, there will not be suffi-
cient clearance to bend the tabs on two sides of the duct connector.
In such cases the tabs may be attached to the sides of the duct by
using sheet metal screws or other suitable fasteners. Holes for sheet
metal screws are provided in three (3) tabs on each side of the duct
connector. If more than 3 tabs need to be used to provide a more
secure and air tight connection, the remaining tabs can also be fas-
tened to the duct with screws after drilling the required screw hole.
Furnace and Air Conditioner Installations
If an air conditioner is installed which does not use the blower for air dis-
tribution and operates completely independent of the furnace, the ther-
mostat system must have an interlock to prevent the furnace and air
conditioner from operating at the same time. This interlock system usu-
ally contains a heat-cool switch which must be turned to either HEAT or
COOL to activate either heating or cooling operation, or a positive OFF
switch on the cooling thermostat.
When used in connection with a cooling unit the furnace shall be
installed parallel with or on the upstream side of the cooling unit to avoid
condensation in the heat exchanger.
For installations with a parallel flow arrangement, the furnace must be
equipped with a damper to prevent cold air from being discharged up
around the heat exchanger. Cold air causes condensation inside the
exchanger and can cause it to rust out which can allow products of
combustion to be circulated into the living area by the furnace blower
resulting in possible asphyxiation. An air flow activated automatic
damper, PIN 7900-6771, is available from furnace manufacturer. See
Figure 11.
Johnson Controls Unitary Products 7