Power Wiring
Check the available power and the unit nameplate for correct voltage. Run the necessary number of properly sized wires to the unit. Provide a disconnect switch (if not included with the unit) and fusing as required (Factory disconnect is a fused disconnect /breaker). Route the conduit through the large knockout located near the electrical box. See Table 5 for Electrical Data.
The disconnect switch may be bolted to the side of the unit but not to any of the removable panels; which would interfere with access to the unit. Make sure that no refrigerant lines will be punctured when mounting the disconnect switch, and note that it must be suitable for outdoor installation.
All power and control wiring must be in accordance with National and Local electrical codes.
Control Wiring
Route the necessary low voltage control wires from the Simplicity™ control board to the thermostat and also between the terminal blocks inside the heat pump and evaporator control boxes. Refer to Figures 3 thru 6 for field wiring diagrams.
Compressors
The scroll compressors used in this product are specifically designed to operate with
Do not leave the system open to the atmosphere. Unit damage could occur due to moisture being absorbed by the POE oil in the system. This type of oil is highly susceptible to moisture absorption
POE (polyolester) compressor lubricants are known to cause long term damage to some synthetic roofing materials.
Exposure, even if immediately cleaned up, may cause embrittlement (leading to cracking) to occur in one year or more. When performing any service that may risk exposure of compressor oil to the roof, take precautions to protect roofing.
Procedures which risk oil leakage include, but are not limited to, compressor replacement, repairing refrigerant leaks, replacing refrigerant components such as filter drier, pressure switch, metering device or coil.
The unit is shipped with compressor mounting bolts which are factory adjusted and ready for operation.
Do not loosen compressor mounting bolts.
This system uses
The compressor also uses a polyolester (POE oil), Mobil 3MA POE. This oil is extremely hydroscopic, meaning it absorbs water readily. POE oil can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere.
Phasing
Scroll compressors require proper rotation to operate properly. Failure to check and correct rotation may result in property damage.
8 | Johnson Controls Unitary Products |
