Chapter 2: Installation
CAUTION
Before operating the unit, you must connect an adequate
2.9.1.1 Single-Phase Units 208/230 V
The supply voltage for units that are designed for
2.9.1.2 Three-Phase Units
CAUTION
Improper wire connections will result in the reverse rotation of the fans/blower motors and compressor and may eventually result in damage to the compressor. To correct this problem, exchange any two of the incoming main power wires at the main power service disconnect switch. Do NOT rewire the unit’s individual components.
2.9.2 Optional Equipment
Additional control wires may be required depending on the options that were purchased with your unit. Optional sensors are to be connected directly to the control terminal board in the Cold Row electric box. You may route the wires through the top or bottom of the cabinet as preferred using the available
NOTE: All wiring must be provided in accordance with local and National Electrical Code requirements for Class 2 circuits.
NOTE: The control transformer(s) supplied with the equipment have been sized and selected based upon the expected loads for each system.
CAUTION
Do not connect any additional loads to the system control transformers. Connecting additional loads to the
2.9.2.1 Remote Water Detector
Refer to Section 2.6.1. Each remote water detector used will require two conductors to be wired to the control terminal block within the unit electrical box. The wire insulation must be rated at 600 V.
2.9.2.2 Remote Temperature/Humidity Sensor
Refer to Section 2.6.2. The remote temperature/humidity sensor is equipped with a shielded cable. The shield is to be terminated at the unit electric box. The electric box includes a control terminal block with
2.9.2.3 Remote On/Off
The unit can remotely turn off the
See Section 4.4.5 for additional information on the remote on/off feature.
2.9.3 Outdoor Equipment
The following sections detail field power wiring required for a typical system. Additional conductors may be required depending on the options purchased with the equipment. Refer to the electrical drawing supplied with your unit for the appropriate field wiring terminations required specifically for your system.
2.9.3.1 Water-Cooled Systems (CRDX-W-FS-12KW, CRDX-W-FS-24KW Models)
Systems equipped with an internal
Page 34 |