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AGATWNDTE01C: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
Representative drawing only, some models may vary.
L11F099
Fig. 12 – Suspended Installation
for Condensing Furnace ONLY
Representative drawing only, some models may vary.
A190232
Fig. 13 – Suspended Back-to-Back
for Non-Condensing Furnaces ONLY.
Representative drawing only, some models may vary.
A10278
Fig. 14 – Suspended Installation for Horizontal Furnaces Stacked
Together
for Non-Condensing Furnaces ONLY.
Horizontal, Stacked Together for Non-Condensing
ONLY
Do not suspend furnaces with straps or suspend furnaces from roof
decking.
For attic installations on a platform, see
Fig. 11:
1. Construct a platform from 3/4-in. (nominal plywood), extending
out 30 inches (762 mm) from the front of each furnace.
2. Maintain all clearances to combustibles per the furnace Installation,
Start-up and Operating Instructions.
3. Follow all additional building codes.
4. Long truss spans may require additional support along the bottom
chord of the truss. Consult the truss manufacturer’s guidelines for
engineering assistance.
5. Long rafter or attic joist spans may require additional support along
the bottom of the rafter or joist. Consult local or regional building
codes for design and loading requirements.
For suspended installations, see
Fig. 14.
(Not recommended for wood trusses unless approved by the truss
manufacturer or other approved engineering methods):
1. Furnaces may be suspended using two (2) pieces of 1-1/2-in. x
1-1/2-in. x 1/4-in. thick cold rolled angle iron underneath the
furnaces and four (4) 3/8-in. diameter threaded rods.
2. Allow for at least 9 inches (229 mm) in front of each door for door
removal.
3. Each piece of angle iron must be secured to the bottom of each
furnace with at least two (2) #8 x 3/4-in. sheet metal screws.
4. Maintain all clearances to combustibles per the furnace Installation,
Start-up and Operating Instructions.
5. Unistrut or similar material may be used, provided that the furnaces
do not sag in the middle or bend or twist at the support ends. The
support material must be secured to the bottom of each furnace in a
manner similar to securing angle iron to the furnace.
6. For all horizontal applications: Return air can only be connected to
bottom opening of furnace.
7. Apply 2 factory-supplied foam strips to mating side of each
furnace. Locate strips equal distance from top and bottom as shown
in
Fig. 6.
8. Remove 7/8-in. diameter accessory hole knockouts in blower
compartment from mating sides of furnaces.
9. Insert a plastic snap bushing through the 7/8-in. K.O. from the
outside of the casing.
10. Position furnaces on top of each other on platform or suspended
supports. Adjust and shim each furnace to align 7/8-in. diameter
holes in both furnaces.
11. Drill two 1/8-in. holes, approximately 1 in. (25 mm) below
discharge flange, from inside top of discharge opening and through
both furnaces. (See
Fig. 7) Drill two 1/8-in. holes, approximately 1
in. (25 mm) above return air opening flange, from inside blower
compartment and through both furnaces. (See Fig. 8)
12. Drive 1 factory-supplied screw through each hole and tighten until
furnaces are secure and foam strips have sealed gap between
furnaces.
13. Connect return- and supply-air ducts to furnaces. Seal duct
connections to prevent air leakage.
14. Move 115-v junction box JB in RH furnace (as viewed from the
upflow position) from left-hand side to right-hand side. Refer to
furnace installation instructions for complete details.
15. Go to Connect Electrical Components.
(B)
(A)
(A)
(B)
(B)
(A)
(B)
(B)
(A)
(A)
(B)
(B)
(A)
(A)
(B)
(B)
(A)
(B)
(B)
(A)
(B)
(B)
(A)
(A) ROD LOCATION USING
DIMPLE LOCATORS (SEE DI-
MENSIONAL DWG FOR LOC-
A
TIONS)
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
1/4” (6.4) ROD HEX
NUT & WASHER
DRAIN
2” (51)
1--1/2” (38) ANGLE
OR EQUIVALENT
USING (B) LOCATIONS
13/16 MAX FROM BACK
OF FURNACE
USING (B) LOCATION
4” TO 8” MAX (101.6 TO
203.2mm)
1/4” (6.4) ROD HEX
NUT & WASHER
3
/
8
″ Flat Washer
3
/
8
″ Hex Nut
3
/
8
″ Flat Washer
1
1
/
2
″ x1
1
/
2
″ x
1
/
4
″ Angle Iron
3
/
8
″ Lock Washer
3
/
8
″ Theaded Rod
3
/
8
″ Lock Washer
3
/
8
″ Hex Nut