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F80CTL and G80CTL: Installation, Start–Up, Operating and Service and Maintenance Instructions
WARNING
!
FIRE, EXPLOSION, AND CARBON MONOXIDE
POISONING HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
Do not install the furnace on its back or hang furnace with control
compartment facing downward. Safety control operation will be
adversely affected. Never connect return-air ducts to the back of the
furnace.
OUTER DOOR
ASSEMBLY
8" (203mm) MIN
FOR DOOR REMOVAL
(2) HEX NUTS, (2) WASHERS & (2) LOCK WASHERS
REQ. PER ROD
Fig. 14 – Horizontal Unit Suspension
Fig. 15 – Horizontal Suspension with Straps
FILTER ARRANGEMENT
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury, or death.
Never operate a furnace without a filter or with filter access door
removed.
There are no provisions for an internal filter rack in these furnaces. A
field-supplied accessory external filter rack is required.
Refer to the instructions supplied with the external filter rack for
assembly and installation options.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
1
/
" (6mm) THREADED ROD
4
4 REQ.
SECURE ANGLE
IRON TO BOTTOM
OF FURNACE WITH
3 #8 x
3
/
" (19mm) SCREWS
4
TYPICAL FOR 2 SUPPORTS
1" (25mm) SQUARE, 1-1/4"x1-1/4"x1/8" (32x32x3mm)
ANGLE IRON OR UNI-STRUT MAY BE USED
A10130
METHOD 2
USE (4) #8 x 3/4 (19 mm) SHEET
METAL SCREWS FOR EACH
STRAP. THE STRAPS
SHOULD BE VERTICAL
AGAINST THE FURNACE
SIDES AND NOT PULL AWAY
FROM THE FURNACE
SIDES.
METHOD 1
FOLD ALL STRAPS UNDER
FURNACE AND SECURE WTH
(4) #8 x 3/4 (19 mm) SHEET METAL SCREWS
(2 SCREWS IN SIDE AND 2 SCREWS
IN BOTTOM).
A10131
Leveling Legs (If Desired)
In upflow position with side return inlet(s), leveling legs may be used,
see
Fig.
16. Install field-supplied, 5/16 X 1-1/2 in. (8 X 38 mm) (max)
corrosion-resistant machine bolts, washers and nuts.
5/ 16
(8mm)
3
1
/
4
(44mm)
(8mm)
5
/
16
(44mm)
(44mm)
Fig. 16 – Leveling Legs
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 Item 1 in "Bottom
Return Air
Inlet"
section in Step 1 above.
To install leveling legs:
1. Position furnace on its back. Locate and drill a hole in each bottom
corner of furnace, see
Fig.
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.
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.
AIR DUCTS
GENERAL REQUIREMENTS
The duct system should be designed and sized according to accepted
national standards such as those published by: Air Conditioning
Contractors Association (ACCA), Sheet Metal and Air Conditioning
Contractors National Association (SMACNA) or American Society of
Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) or
consult The Air Systems Design Guidelines reference tables available
from your local distributor. The duct system should be sized to handle
the required system design CFM at the design external static pressure.
The furnace airflow rates are provided in
(With Filter). When a furnace is installed so that the supply ducts carry
air circulated by the furnace to areas outside the space containing the
11
(8mm)
5/ 16
3
1
/
4
(44mm)
(8mm)
5/ 16
3/ 4
1
3/ 4
1
16.
Table
4-Air Delivery-CFM
A89014
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