Trane CCAF, User Manual

7

CG-PRC012-EN

Options

Hot Gas Bypass:

 Hot gas bypass option

allows unit operation below the
minimum step of unit unloading. The
regulator valve, along with all associated
refrigerant piping and electrical wiring,
are factory installed and tested on one
refrigeration circuit. Unit does not start in
hot gas bypass mode. If the unit operates
in bypass mode for 30 minutes without a
call for cooling, it will pump down and
shut off. Unit starts immediately upon a
further call for cooling.

Chilled Water Reset:

 Front panel settable

control, microprocessor based control
strategy, and field-installed sensor for
ambient temperature based reset are
included in this option. Return water
reset sensor is standard, but panel
controller and control strategy must be
ordered as an option.

Tracer Summit Communication
Interface:

 Permits bi-directional

communication to the Trane Integrated
Comfort system.

LonTalk LCI-C Communication Interface:

Provides the LonMark chiller profile
inputs/outputs for use with a generic
building automation system.

Remote Input Options

Remote chilled water setpoint input
(4-20mA/2-10Vdc), compressor inhibit
which locks out the second compressor
on each circuit reducing the kW draw or
both.

Control Output Options

Programmable relays provided to
indicate: Compressor running, maximum
capacity, chiller limit mode, warning
(informational diagnostic), alarm latching
(shutdown diagnostic), alarm
nonlatching (shutdown diagnostic),
alarm latching or nonlatching.

Ice Making Controls:

 In ice-making

mode, the unit will operate fully loaded
in response to jobsite supplied contact
closure. Ice making will terminate when
the return fluid temperature falls below
an adjustable setpoint (minimum 20°F
[-6.7°C]). When not in ice making mode,
unit will provide modulating capacity
control based on leaving chilled fluid
temperature (20-55°F) [-6.7°C to 12.8°C].

Unit Mounted Disconnect Switch:

 Non-

fused molded case disconnect switch
factory installed in control panel for
disconnecting main three-phase power.

Isolators:

 Neoprene-in-shear isolators for

field installation under unit frame.

Sound Attenuation:

 Factory-installed

acoustical attenuation for applications
where extremely low sound level is
required.

Water Regulating Valves:

 Field-installed

valves provide means for control of head
pressure.

Outdoor Temperature Sensor:

 Field-

installed outdoor temperature sensor
with an adjustable setpoint provides
means for low ambient lockout.

Condenser Water Temperature Sensor:

Factory installed temperature sensor
provided for microprocessor display.

Options

Features and
Benefits