Slab Mounting
Discharge Air
Building
Structure
Mounting Slab
Ground Level
2° or 2" per 5' slope tolerance away from building structure.
Figure 2
Wind Barrier Construction | |
Prevailing Winter Winds |
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Wind Barrier |
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Inlet Air | 24" |
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| Inlet Air |
Inlet Air |
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Figure 3
Electrical Wiring
All field wiring must be done in accordance with the National Electrical Code (NEC) recommendations, Canadian Electrical Code (CEC) and CSA Standards, or local codes, where applicable.
WARNING
Unit must be grounded in accordance with national and local codes. Failure to ground unit properly can result in personal injury or death.
Refer to the furnace or blower coil Installation Instructions for additional wiring application diagrams and refer to unit rating plate for minimum circuit ampacity and maximum overcurrent protection size.
# 48283B006
1.Install line voltage power supply to unit from a properly sized disconnect switch. Any excess high voltage field wiring should be trimmed or secured away from the low voltage field wiring.
2.Ground unit at unit disconnect switch or to an earth ground. To facilitate conduit, a hole is in the bottom of the control box. Connect conduit to the control box using a proper conduit fitting. Units are approved for use only with copper conductors. 24V Class II circuit connections are made to the low voltage pigtails. A complete unit wiring diagram is located inside the unit control box cover (see also pages 16 and 17 of this instruction).
3.Install room thermostat on an inside wall that is not subject to drafts, direct sunshine, or other heat sources.
4.Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit (see Figure 4).
5.Do not bundle any excess 24V control wire inside control box. Run control wire through installed wire tie and tighten wire tie to provide low voltage strain relief and to maintain separation of
Thermostat Designations
Thermostat | Indoor Unit |
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R | Power | R | Outdoor |
| Unit | ||
| Heat |
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W1 | W |
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Y | Cooling | Y | Y1 Outdoor Unit |
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G | Indoor Blower |
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| G |
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C |
| C | C Outdoor Unit |
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See unit wiring diagram for power supply connections. If the indoor unit is not equipped with a blower relay, one must be field supplied and installed.
Do not connect C (common) connection between indoor unit and thermostat except when required by the indoor thermostat. Refer to thermostat installation instructions. C (common) connection between indoor unit and outdoor unit required for proper operation.
Figure 4
Refrigerant Piping
Field refrigerant piping consists of liquid and suction lines from the outdoor unit (sweat connections) to the indoor coil (flare or sweat connections).
Select line set diameters from Table 2 on page 4 to ensure that oil returns to the compressor. Size vertical
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