A minimum clearance of 18 inches is required for service at the control panel and compressor compartments access. 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 out- door unit from the home can lead to the refrigerant lines being restricted by trampling or by being punctured by lawn mowers. Locate the outdoor unit away from bedroom win- dows or other rooms where sound might be objectionable.
Adverse effects of prevailing winds, blowing snow or sleet onto the outdoor coil can be eliminated by placing the outdoor 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 outdoor unit.
The unit must be located outdoors and must not be con- nected to duct work. It is recommended the outdoor unit be mounted upon a solid base that will not shift or settle. Top of base should be two inches above grade. Thought should be given to water drainage away from the outdoor unit. Drain holes in the base pan must be kept clear.
| MINIMUM 24” SERVICE ACCESS | THERMOSTAT | TO FURNACE OR | |
60” OVERHEAD | CLEARANCE ON ONE SIDE | |||
| ||||
| AIR HANDLER | |||
CLEARANCE | WEATHERPROOF |
| ||
| TERMINAL BLOCK | |||
| DISCONNECT |
| ||
|
|
| ||
| SWITCH |
| NEC CLASS 1 WIRING | |
|
|
| NEC CLASS 2 WIRING | |
10” CLEARANCE |
|
| TO INDOOR COIL | |
COIL AREA |
|
|
NOTE: ALL OUTDOOR WIRING MUST BE WEATHERPROOF.
SEAL OPENING(S) WITH
PERMAGUM OR EQUIVALENT
CONTROL ACCESS PANEL
FIGURE 1 : TYPICAL RESIDENTIAL OUTDOOR UNIT LOCATION
Unitary Products Group | 3 |
