CHECK ELECTRICAL POWER SUPPLY
The electrical power should be checked to determine if ade-
quate power is available, and near constant voltage can be
maintained. If there is any question concerning the power
supply, contact the local power company for corrections; oth-
erwise, unsatisfactory performance may result.
SELECTING EQUIPMENT LOCATIONS
Several important factors must be considered before selecting
the best site for the air conditioning outside unit:
•
Distance to indoor coil
•
Proximity to the structure
•
Proximity to vents and exhaust systems
•
Ability to service
•
Sound transmission
•
Air circulation
•
Wind direction
•
Relationship between structure, sun, and unit
•
Distance from power source
•
Water drainage
•
Local codes
Locate the outside unit near enough to the indoor coil vicinity
to eliminate lengthy refrigerant line runs. Do not locate the
outside unit so it discharges air under eaves or gutters. Rain
or snow melt-off should not be able to run off a roof and down
upon the unit. Be sure vents are not located upwind from the
outside unit.
A minimum clearance of 18 inches is required on one side of
the control panel for service. A 10 inch clearance is required for
the air inlet to the outdoor coil around the perimeter of the unit.
The air discharge of the unit requires a 60 inch clearance
between the top of the unit and any obstruction. See Figure 1.
The length of the refrigerant tubing, between the outdoor unit
and indoor coil, should be as short as possible to avoid capacity
and efficiency loss. Excessive spacing of the outside unit from
the home can lead to the refrigerant lines being restricted by
trampling or by being punctured by lawn mowers. Locate the
outside unit away from bedroom windows or other rooms where
sound might be objectionable.
Adverse effects of prevailing winds, blowing snow or sleet on
the outdoor coil can be eliminated by placing the outside unit
where the wind does not blow across the unit. Trees, shrubs,
corners of buildings and fences standing off from the coil can
reduce capacity loss due to wind chill effect.
Provide ample clearance from shrubs to allow adequate air to
pass across the outdoor coil without leaves or branches being
pulled into the coil.
Consideration should be given to the distance and routing of
electrical service that would have to be run to connect the
outside unit.
The unit must be located outdoors and must not be connected
to duct work. It is recommended the outside unit be mounted
on a concrete pad. Top of pad should be two inches above
grade.
OUTDOOR UNIT
After the site has been selected a concrete base pad should
be provided. The concrete pad should not come in contact with
the foundation or side of the structure because sound may be
transmitted to the residence. The concrete pad need not be any
larger than the outside dimensions of the outdoor unit. The
concrete pad should be located far enough away from the
structure so the outside unit is not closer than its minimum
distances. See Figure 1. Set the outside unit upon the pad with
care to avoid damage.
Caution:
Do not remove the protective caps or plugs from
the unit refrigerant connections until the refrigerant
lines are run and ready for final connection. If this
procedure is not observed, dirt and other particles
will get into the system and plug various orifices
and small tubes.
AMBIENT AIR TEMPERATURE
ON OUTDOOR COIL
AIR TEMPERATURE
ON INDOOR COIL
Min. °DB
Max. °DB
Min. °WB
Max. °WB
50
120
57
72
TABLE 1 - APPLICATION LIMITATIONS
CONTROL ACCESS PANEL
10" CLEARANCE
COIL AREA
60" OVERHEAD
CLEARANCE
18" SERVICE
ACCESS CLEARANCE
WEATHERPROOF
DISCONNECT
SWITCH
NEC CLASS 1 WIRING
THERMOSTAT
TO FURNACE OR AIR HANDLER
TERMINAL BLOCK
NEC CLASS 2 WIRING
TO INDOOR COIL
NOTE: ALL OUTDOOR WIRING MUST
BE WEATHERPROOF
SEAL OPENING(S) WITH PERMAGUM OR EQUIVALENT
FIGURE 1 - OUTDOOR UNIT LOCATION
550.46-N1YI
2
Unitary Products Group
