a. Lay furnaces back-to-back on a flat surface.
b. Similar to side-by-side installations (See Fig. 24.), drill two 1/8-in. holes, approximately 1 in. below discharge air flange, from inside
top of discharge opening and through both furnaces. Also drill two 1/8-in. holes, approximately 1 in. below return air flange, from inside
top of return air opening and through both furnaces.
c. Drive 1 factory-supplied No. 6 X 3/4-in. LG screw through each hole and tighten until furnaces are secure and foam strips have sealed
gap between furnaces.
5. With furnaces laying in their side and back-to-back, determine which side will now be the top side to route external extension harness. Use
the unused condensate drain holes in blower housing area.
6. Connect return- and supply-air ducts to furnaces. Seal duct connections to prevent air leakage.
7. Follow individual furnace installation instructions for horizontal applications. This includes, but not limited to: condensate trap,
condensate/inducer housing tubing, pressure switch tubing venting and electrical connections.
PROCEDURE 2—CONNECT ELECTRICAL COMPONENTS—HEATING
WARNING: FIRE HAZARD
Failuie to follow this warning could result in fire, personal injury, or death.
Make no connections between the R 24-vac connector in 1 furnace and the R 24-vac connector in other furnace.
See electrostatic discharge precaution on page 4.
NOTE: To determine referencing of Left Hand (LH) and Right Hand (RH) furnace:
a. In the Side-by-Side, upflow and downflow applications, reference the furnaces from the front, as you would see them in the upflow application
(See Fig. 29.) The LH furnace is the main furnace and the RH furnace is the secondary furnace.
b. In the Back-to-Back, upflow, downflow and horizontal applications, reference the furnaces from the side of the external extension harness. The
LH furnace is the main furnace and the RH furnace is the secondary furnace, as you would see them in the upflow application (See Fig. 30.)
There are 3 harnesses included in this kit. If the furnaces are side-by-side, only 2 harnesses are required. If the furnaces are installed back-to-back,
all 3 harnesses included in the kit must be used.
1. Remove outer doors and blower access doors from both furnaces.
2. If furnaces are installed back-to-back in any orientation, the External Extension Harness must be used. The harness consists of:
a. 54 ½ inches of ½″ flexible steel conduit
b. (2) 90° conduit connectors
c. (3) 4 wire polarized wiring harness
d. (3) 2 wire polarized wiring harness
Fig. 27—Suspended Installation of Furnaces
A02208
3
/8" ROD, HEX NUT
& WASHER
(B)
(A)
(A)
(B)
(B)
(A) ROD LOCATION USING
DIMPLE LOCATORS
( SEE DIMENSIONAL DWG
FOR LOCATIONS)
(B)
(A)
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
1
1
/2" ANGLE
OR EQUIVALENT
(B)
(B)
(A)
3
/8" NUT, BOLT
& WASHERS
(A)
(B)
USING (B) LOCATIONS
13
/16" MAX FROM BACK
OF FURNACE
DRAIN
5
3
/4"
USING (B) LOCATIONS
4" TO 8" MAX
3
/8" ROD, HEX NUT
& WASHER
(B)
(A)
(A)
(B)
(B)
(A) ROD LOCATION USING
DIMPLE LOCATORS
( SEE DIMENSIONAL DWG
FOR LOCATIONS)
(B)
(A)
(A) PREFERRED ROD LOCATION
(B) ALTERNATE ROD LOCATION
1
1
/2" ANGLE
OR EQUIVALENT
(B)
(B)
(A)
3
/8" NUT, BOLT
& WASHERS
(A)
(B)
USING (B) LOCATIONS
13
/16" MAX FROM BACK
OF FURNACE
DRAIN
5
3
/4"
USING (B) LOCATIONS
4" TO 8" MAX
—30—
(54 pages)
(124 stránky)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals