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CG-PRC011-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
temperature based (ambient or zone)
reset are included in this option. Return
water reset sensor is standard, but panel
controller and control strategy must be
ordered as an option.
Communications Interface:
Bi-directional (Trane ICS) and generic
BAS (external chilled water setpoint)
communication interfaces are available
for external control applications.
Remote Display Panel: The remote panel
has the same digital display that is on the
unit control panel as well as an auto/stop
switch. Another auto/stop switch can be
wired from pump contactor or time clock
(scheduling). Remote display is mutually
exclusive with Trane ICS and generic
BAS.
Remote Running Indication and Alarm
Contacts: Two separate single pole/
double throw contacts are provided to
indicate when the compressors are
running and if a unit failure has occurred.
A failure will be indicated if the unit has a
manual reset fault. A failure is not
indicated on an automatic reset fault.
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].
Cycle Counter and Hour Meter: One
cycle counter and hour meter per
compressor.
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.
Gauges: Factory-installed gauges
monitor suction and discharge pressure.
One set of gauges per refrigeration
circuit.
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.
Low Ambient Thermostat: Field-installed
outdoor thermostat with an adjustable
setpoint provides means for low ambient
lockout.
Condenser Water Temperature Sensor:
Field-installed matched pair temperature
sensors provide for microprocessor
display.
Options