CyberChiller Series Installation, Operation & Maintenance Manual

Each unit is provided with main power and control terminal positions for connection of the field-wiring. The opening for the conduit is located in the floor of the cabinet. A label stating "MAIN POWER INPUT" is in close proximity. The main power wires are terminated at the line side of the service disconnect switch located within the electric box. (See Figure 6.) A separate equipment ground lug is provided within the electrical box for termination of the earth ground wire. Terminals are available as an interface to a dry contact, (N.O./N.C.), relay for a remote alarm status signal.

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6

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Figure 6- Electric Box

The number call outs in Figure 6 coincide with the numbered items listed below.

1.Power Switches/Motor Starter Protectors

2.Control Circuit Breakers

3.Service Disconnect Switch

4.Ground Lug

5.Control I/O Board

6.Interface Terminals

CAUTION

Improper wire connections will result in the reverse rotation of the pumps and compressor (if applicable) and may eventually result in damage to the scroll compressor. To correct this problem, exchange any two of the incoming main power wires at the main power circuit breaker. Do NOT rewire the unit's individual components.

Prior to unit operation, an adequate unit-to-earth ground must be connected to the unit.

2.6.2Controls

Stulz Air Technology Systems offers the C6000 Microprocessor as the standard controller for the CyberChiller system. If it is mounted on the unit (standard), no utility connection is required. As an option a factory supplied display may be remote mounted. A six-conductor cable harness is provided for interconnect wiring. Refer to the electrical drawings supplied with your unit for details on interconnecting field wiring.

2.6.3Optional Equipment

NOTE

All wiring must be provided in accordance with local and national electrical code requirements.

2.6.3.1 Remote Water Detector

The optional remote water detector requires two conductors to be wired to the control terminal board within the unit electrical box. The wire insulation must be rated at 600V. The water detector includes screw type terminals for wire connections. Refer to the supplied electrical schematic for proper wire termina- tions.

2.6.4Interconnecting Field Wiring

The following system interconnecting field wiring sections detail the wiring required for a typical system. Additional control conductors may be required depending on the options purchased with the equipment. Refer to the supplied electrical drawings to determine the total number of interconnecting conductors required for your system. It is important to note that the control transformer(s) supplied with the equipment are 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 factory supplied control transformer may result in overloading of the transformer, which will cause the transformer circuit breaker to trip.

NOTE

All wiring must be provided in accordance with local and national electrical code requirements.

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(©October, 2006)