Applications and Furnace
Installation
NOTE: Remove refrigerant line knockouts in furnace only when installing indoor coil of an air conditioning or heat pump system.
Refer to instructions supplied with accessory equipment.
Over-the-Floor Return Air System (Non-Ducted)
1.If floor underneath furnace is made of com- bustible material, locate a pan fabricated of
2.Use optional upflow stand with filters or con- struct a suitably braced mounting platform in closet (see Figure 17 or 18).
3.Install 240V supply circuit(s) and 24V wir- ing to closet (see Figure 16 for appropriate locations).
4.Position optional coil cabinet onto upfl ow stand or mounting platform and secure with three or more fasteners.
5.Position furnace in upflow mode onto coil cabi- net and secure with two or more fasteners.
6.Use optional upfl ow duct connector or fi eld supplied connector to attach furnace to overhead supply duct. (see Figure 17)
7.Install return air grille in closet preferably at same level as upfl ow stand or below mounting platform (see Figure 18).
NOTE: Be certain to provide an adequate free return air area as described under Return Air Codes and Requirements and
Through-the-Floor Return Air System (Ducted)
1.Prepare Floor Opening(s):
a.Mark fl oor opening(s) as shown in Figure 19. Provide minimum clearances at rear and left side walls of closet for installation of furnace and wiring.
b.Cut fl oor opening on outside edge of marked line so that opening is slightly larger than area marked.
c.Additional provisions may be necessary for optional air conditioning if refrigerant lines are installed other than at the front of the furnace.
2.If return air duct is made of combustible material, locate a pan fabricated of non- combustible material with 1” upturned fl anges under furnace return air opening.
3.Install 240V supply circuit(s) and 24V wir- ing to closet (see Figure 16 for appropriate locations).
4.Position optional coil cabinet over floor cutout and secure with three or more fasteners.
5.Position furnace onto coil cabinet and secure with two or more fasteners.
6.Use optional upfl ow duct connector or fi eld supplied connector to attach furnace to overhead supply duct (see Figure 17).
ELECTRICAL SYSTEM
INSTALLATION
WARNING:
To avoid the risk of electrical shock, personal injury or death, disconnect all electrical power to the unit before performing any maintenance or service.The unit may have more than one electrical power supply.
Codes, Specifications, and Re- quirements
The wiring, installation, and electrical hookup of this furnace must comply with the National Electrical Code (or the Canadian Electrical Code) and all regulations of local authorities having jurisdiction.SeeTable 9a & 9b for minimum circuit ampacity, maximum
Coil Cabinet
Air Filter |
|
Braced |
|
Mounting |
|
Platform | WALL |
| |
Front |
|
Grille |
|
| FLOOR |
| |
| Pan or |
| Enclosure |
Figure 18. Over-the-Floor Return Air
System
17
