Features Summary

Standard CenTraVac^® Features

The following features are provided as standard with all Trane CenTraVac^® chillers:

• Motor-compressor assembly with integral lubrication system.
• Evaporator condenser assembly.
• Two-stage economizer assembly on CVHE/CVHG style units (single-stage on CVHF style units).
• Prewired instrument and control panel.
• Oil and refrigerant charge.
• Oil heater.
• Isolation pads
• Wiring and conduit for purge and oil system interconnection to the main control panel.
• Installation, operation, and maintenance instructions.
• Start-up and operator instruction service.
• Advanced motor protection.

Cen TraVac Motor

The motor provided in the Trane CenTraVac chiller is a specially designed squirrel cage, two pole induction motor suitable for 50 and 60 hertz, three-phase current.

Trane CenTraVac motors are cooled by liquid refrigerant surrounding the motor windings and rotor. Use of liquid refrigerant results in uniform low temperatures throughout the motor, thereby promoting long motor life.

Oil Pump Motor

The oil pump motor is a 120 volt, 50/60 hertz, 1 /4 hp, 1 phase motor with protective fusing and panel mounted contactor.

Purge

The purge unit motor is a 120 volt, 50/60 hertz, 1 /4 hp, 1 phase motor with integral overload protection and panel mounted contactor.

The use of an air-cooled condensing unit obtains separation temperatures in the purge drum as low as 0 F. Normal operating efficiency does not exceed 0.002 lbs. of refrigerant lost per pound of dry air removed. The purge system can be operated at any time, independent of chiller operation.

Optional Features

Trane offers a selection of optional features to either complete the basic chiller installation or to allow modification for special purpose applications.

• Medium voltage (over 600 volts) hermetic motor construction for CenTraVac compressors.
• Complete line of compressor motor starters built to rigid Trane standards.
• Unit mounted starter accessory on low voltage units up to an RLA of 1080 amps.
• Marine waterboxes for evaporators and condensers
• High pressure (300 psig working pressure) water side construction.
• Free cooling option.
• Heat recovery or auxiliary condensers.
• Smooth bore tubing.
• Factory-applied thermal insulation
• One-inch deflection spring isolators for vibration-sensitive installations.
• Building automation systems (BAS) interface
• Variable speed drives

Compressor Motor Starting Equipment Features

To eliminate the need for special engineering design and multiple vendor coordination, Trane can provide compressor motor starting equipment built to rigid Trane specifications. The types of starters available include:

Low Voltage (200 to 600 volts)

• Star (wye)-delta closed transition
• Full voltage
• Autotransformer, closed transition
• Solid-state starters

Medium Voltage (2300 to 6000 Volts)

• Full voltage
• Primary reactor, closed transition
• Autotransformer, closed transition

Medium voltage starters are provided as standard with a non-load break isolation switch and current limiting fuses.

All starters provided by Trane include the following standard features for safe, efficient application and ease of installation:

• NEMA 1 starter enclosure.
• 120 volt, 60 hertz, 1 phase fused pilot and safety circuits.
• Control power transformer (3.0 KVA) with 120 volt, 50 or 60 hertz, single- phase.
• One pilot relay to initiate start sequence from CenTraVac control circuit signal.
• Starter enclosures capable of being padlocked.
• Automatic transfer from wye to delta on any two-step starter.

In addition, Trane offers a wide selection of optional starter features.

• Starters with standard or high interrupting capacity circuit breakers, to provide disconnect means and short circuit protection (low voltage only).
• Ammeters and voltmeters.
• Special function pilot lights.
• Special NEMA enclosures.
• Ground fault protection.
• Power factor correction capacitors.
• I.Q. Data Plus monitor device.

If the CenTraVac compressor starting equipment is provided by others, the starter must be designed in accordance with the current Trane standard engineering specification "Water- Cooled CenTraVac^® Starter Specification." It is also recommended that two copies of the interconnecting and control circuit wiring diagrams be forwarded to The Trane Company for review. This service is provided at no charge, and is intended to help minimize the possibility that Trane CenTraVac chillers will be applied in improper starting and control systems. However, the responsibility for providing proper starting and control systems must remain with the system designer and the installer.

Contact your local Trane sales office for further information.