Trane ctv-prc007-en manual Isolation Pads, Refrigerant and Oil Charge, Insulation, Painting

Mechanical Specification

The display also provides over 20 reports that are organized into four groupings: Custom Report, Chiller Report, Refrigerant Report, and Compressor Report. Each report contains data that is accessed by scrolling through the menu items.

Each grouping will have a heading which describes the type of data in that grouping. This data includes:

•All water temperatures and setpoints (as standard factory mounted temperature sensors)

•Current chiller operating mode

•Diagnostic history

•Control source (i.e. local panel, external source, remote BAS)

•Current limit setpoint

•Water flows (optional)

•Water pressure drops (optional)

•Outdoor air temperature (optional)

•Saturated refrigerant temperatures and pressures

•Purge suction temperature

•Evaporator refrigerant liquid level

•Condenser liquid refrigerant temperature

•Compressor starts and hours running

•Phase currents

•Phase voltages (optional)

•Watts and power factor (optional)

•Oil temperature and flow

•Motor winding temperatures

•Bearing temperatures (optional)

•Refrigerant detection external to chiller in ppm (optional)

All necessary settings and setpoints are programmed into the microprocessor controller via the keypad of the operator interface. The controller is capable of receiving signals from a variety of control sources (which are not mutually exclusive — i.e. any combination of control sources can coexist simultaneously) and of being programmed at the keypad as to which control source has priority. Control sources can be:

•The local operator interface (standard)

•The remote operator interface (optional)

•A 4-20 mA or 2-10 vdc signal from an external source (interface optional) (control source not supplied by chiller manufacturer)

•Tracer™ (interface optional) (Tracer supplied by Trane)

•Process computer (interface optional) (control source not supplied by chiller manufacturer)

•Generic BAS (interface optional ) (control source not supplied by chiller manufacturer)

The control source with priority will then determine the active setpoints via the signal that is sent to the control panel.

Isolation Pads

Isolation pads are supplied with each CenTraVac™ chiller for placement under all support points. They are constructed of molded neoprene.

Refrigerant and Oil Charge

A full charge of refrigerant and oil is supplied with each unit. The oil ships in the unit’s oil sump and the refrigerant ships directly to the jobsite from refrigerant suppliers.

Thermometer Wells and Sight Glasses

In addition to the thermowells provided for use with the standard unit safety controls, a well is provided for measurement of the liquid refrigerant condensing temperature and a coupling for the evaporating temperatures. Sight glasses are provided for monitoring oil charge level, oil flow, compressor rotation and purge condenser drum.

Insulation

Factory applied insulation is available on all units. All low temperature surfaces are covered with 3/4-inch Armaflex II or equal (thermal conductivity = 0.28 Btu/hr- ft2), including the evaporator, waterboxes and suction elbow. The economizer and motor cooling lines are insulated with 3/8” and 1/2” insulation respectively.

Refrigerant Pumpout/

Reclaim Connections

Connections are factory provided as standard to facilitate refrigerant reclaim/ removal required during maintenance or overhaul in accordance with ANSI/ ASHRAE 15.

Painting

All painted CenTraVac surfaces are coated with two coats of air-dry beige primer-finisher prior to shipment.

Unit Mounted Starter Option

The unit mounted starter can either be a star-delta or a solid-state starter in a NEMA 1 type enclosure. The starter is factory mounted and completely prewired to the compressor motor and the control panel. The CenTraVac chiller/ starter assembly is factory tested.

Starter is provided with a 3 KVA control power transformer (120 volt secondary). The starter door is designed to accommodate a padlock.

Available options include:

•Circuit Breaker — A standard interrupting capacity circuit breaker is available. The circuit breaker is mechanically interlocked to disconnect line power from starter when the starter door is open.

•High Interrupting Capacity Circuit Breaker — High interrupting capacity circuit breaker is available. This breaker is also interlocked to disconnect line power from the starter when the starter door is open.

•Circuit Breaker with Ground Fault — Ground fault protection is available with either standard or high interrupting capacity circuit breakers. An indicator light is provided to indicate if ground fault has occurred.

•Current Limiting Circuit Breaker — A standard circuit breaker incorporating three current limiters with fuse links is available. A fault current in excess of the circuit breaker capacity will blow the fuse links and interrupt the fault current. The circuit breaker cannot be reset until the blown current limiters are replaced.

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