Fedders C18ABD1VF Manuale Utente

2

Six feet

clearance

above the

unit

Three feet

clearance 

Rain Gutters

Concrete slab
or preformed pad

Three feet

clearance 

The condensing unit should be located outdoors as close as
possible to the evaporator. Consider the following factors:
Clearances

The air inlet should be located at least 12" from a wall or
other obstruction for unrestricted air flow.
The air outlet should be located so as to direct discharged
air away from the building. Three feet of clearance around
the unit and a minimum of six feet clearance above the
unit is required to avoid recirculation of condenser
discharge air on vertical discharge models.  Avoid locating
unit under low overhanging roofs.

Mount the unit on a sturdy base approximately four to six
inches above the ground. In areas known for snow
accumulation, the unit should be elevated at least 18"
above the ground. A concrete slab is recommended.
Concrete slab should not contact the building foundation
to prevent possible sound or vibration transmission.
Rooftop installation is acceptable in areas of low snow
accumulations, provided the roof will support the unit and
provisions are made for water drainage and the noise or
vibration through the structure.

Placement of the unit should be in a well-drained area, or
the unit must be supported high enough so run-off will not
enter the unit.
Avoid installations under roof overhangs without
guttering. Water draining from the roof onto the unit
could produce excessive noise and may cause ice to build
up on the coil or fan during cold weather.

Locate unit away from windows, patios, decks, etc. where
unit operation sound may disturb customer.

Do not locate where heat, lint or exhaust fumes will be
discharged on the unit (as from dryer or furnace vent). 

Locating the condenser as close as possible to the
evaporator will increase the system capacities by reducing
the line set refrigerant pressure drop, and will make the
system less susceptible to liquid migrations due to less
refrigerant charge.

1. The installer shall check available power to make certain it

matches the unit rating plate (located inside control box
cover) and that constant voltage can be maintained to the
unit. Unsatisfactory performance would otherwise result.
The local power company should be contacted regarding
any problems or questions concerning power supply.

Control box cover

Wiring diagram and rating
plate are located inside
control box cover

Opening for 
low-voltage wiring

Opening for line
voltage conduit or cable

2. Install a line service disconnect switch within sight of the

condensing unit. The line voltage service wiring for the
condensing unit should include a fused disconnect switch.

3. Use correct wire size and fuse size. To ensure that adequate

voltage will be available at the condensing unit, the line
voltage service wiring must be of adequate size. Minimum
recommended wire ampacities and maximum fuse sizes are
listed on the unit name plate.

4.  Two holes are provided in the control box.

a. One is for the connection of the line voltage conduit or

cable. The hole is sized for 3/4" conduit.

b. One is for low-voltage wiring. (Refer to the wiring 

diagram attached to electrical box cover for connection.)

5. Be sure to ground the condensing unit by securing the

ground wire to the grounding lug inside the control box.

6. Be sure to follow National Electrical Code and all local

codes.