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59TN6C: Installation, Start-up, Operating, Service and Maintenance Instructions
FURNACE CASING
WIDTH
IN. (mm)
Upflow Applications on Combustible or Noncombustible Flooring
24-1/2
(622)
Downflow Applications on Combustible Flooring with coil assembly coil
*. Not all families have these models.
A
PLENUM
OPENING
B
D
FLOOR
OPENING
C
Fig. 25 – Installation on Combustible Flooring
Leveling Legs (If Desired)
In upflow position with side return inlet(s), leveling legs may be used.
See
Fig.
26. Install field-supplied, 5/16 x 1-1/2 in. (8 x 38 mm) (max)
corrosion-resistant machine bolts, washers and nuts.
NOTE: Bottom closure must be used when leveling legs are used. It
may be necessary to remove and reinstall bottom closure panel to install
leveling legs. To remove bottom closure panel, see
To install leveling legs:
1. Position furnace on its back. Locate and drill a hole in each bottom
corner of furnace.
2. For each leg, install nut on bolt and then install bolt with nut in
hole. (Install flat washer if desired.)
3. Install another nut on other side of furnace base. (Install flat washer
if desired.)
4. Adjust outside nut to provide desired height, and tighten inside nut
to secure arrangement.
5. Reinstall bottom closure panel if removed.
"
5/ 16
(8mm)
"
3
1
/
4
(44mm)
(8mm)
"
5
/
16
(44mm)
1
(44mm)
Fig. 26 – Leveling Legs
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 6 – Opening Dimensions - In. (mm) (Continued)
APPLICATION
(Subbase not required)
Downflow Applications on Noncombustible Flooring
(Subbase not required)
Downflow applications on Combustible flooring
(Subbase required)
or coil box (Subbase not required)
FURNACE
FURNACE
(OR COIL CASING
WHEN USED)
APPROVED
COIL ASSEMBLY
OR
COIL BOX
COMBUSTIBLE
COMBUSTIBLE
FLOORING
FLOORING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
SHEET METAL
PLENUM
FLOOR
FLOOR
OPENING
OPENING
Fig.
24.
(8mm)
"
5/ 16
"
3
1
/
4
(44mm)
(8mm)
"
5/ 16
"
3/ 4
"
3/ 4
1
Location Relative to Cooling Equipment
The cooling coil must be installed parallel with, or on the downstream
side of the unit to avoid condensation in the heat exchangers. When
installed parallel with the furnace, dampers or other flow control must
prevent chilled air from entering the furnace. If the dampers are
manually operated, they must be equipped with means to prevent
operation of either unit unless the damper is in the full-heat or full-cool
position.
FILTER ARRANGEMENT
A10491
FIRE, CARBON MONOXIDE AND POISONING
HAZARD
Failure to follow this warning could result in fire, personal injury or
death.
Never operate a furnace without a filter or filtration device installed.
Never operate a furnace with filter or filtration device access doors
removed.
There are no provisions for an internal filter rack in these furnaces. An
external filter is required.
The furnace may use an optional media filter cabinet. The optional
media filter cabinet uses either a standard 1-inch (25 mm) filter or 4-inch
(102 mm) wide media filter which can be purchased separately.
The optional media cabinet is sized for bottom return applications for
use in upflow, downflow and horizontal applications.
For upflow side return applications, the optional media cabinet (or field
supplied accessory air cleaner) can be installed on the side of the furnace
or side and bottom when a bottom plenum is used. See
Fig.
27.
For downflow applications, the optional media cabinet (or field supplied
accessory air cleaner) must only be connected to the bottom opening on
the furnace. See
Fig. 22
For horizontal applications, the optional media cabinet (or field supplied
accessory air cleaner) for all models can be connected to the bottom
opening on the furnace. For side return use in the horizontal position,
refer to
Fig.
23. If both side and bottom openings are used in
each opening used will require a filter.
A filter rack or any field supplied accessory air cleaner can also be
installed in the common return duct prior to entering the return air
opening in any orientation.
Refer to the instructions supplied with the optional media cabinet, filter
rack or accessory air filter for assembly and other details.
Due to the relatively high pressure drops of 1-in (25 mm) thick
after-market filter media, it is recommended that the filtration system be
A89014
designed for at least 2-in (51 mm) thick media.
19
PLENUM OPENING
FLOOR OPENING
A
B
C
23
21-5/8
23-5/8
(584)
(549)
(600)
22-7/8
19
23-1/2
(581)
(483)
(597)
22-1/8
19
23-3/4
(562)
(483)
(603)
22-1/2
19
23-1/2
(572)
(483)
(597)
WARNING
!
and
Fig.
27.
D
22-1/4
(565)
19-5/8
(498)
20-5/8
(524)
20
(508)
Fig. 21
and
Fig.
23,
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