Hot Gas Bypass Contactor Relay (3C) - Carrier AquaEdge 19XRV series Operation, Maintenance And Installation Manual

OIL RECLAIM
SIGHT GLASS
DIFFUSER PRESSURE
AND DIFFUSER ACTUATOR
CABLE (FRAME 4 & 5
COMPRESSOR ONLY)
GUIDE VALVE
ACTUATOR CABLE
COMPRESSOR DISCHARGE
TEMPERATURE SENSOR
CABLE
HIGH PRESSURE
SWITCH LOCATION
INTERNATIONAL CHILLER VISUAL CONTROLLER
(ICVC) — The ICVC is the "brain" of the PIC III system. This
module contains all the operating software needed to control
the chiller. The ICVC is mounted to the control panel (Fig. 14)
and is the input center for all local chiller set points, schedules,
configurable functions, and options. The ICVC has a stop
button, an alarm light, four buttons for logic inputs, and a
backlight display. The backlight will automatically turn off
after 15 minutes of non-use. The functions of the four buttons
or "softkeys" are menu driven and are shown on the display
directly above the softkeys.
The viewing angle of the ICVC can be adjusted for opti-
mum viewing. Remove the 2 bolts connecting the control panel
to the brackets attached to the cooler. Place them in one of the
holes to pivot the control panel forward to backward to change
the viewing angle. To change the contrast of the display, access
the adjustment on the back of the ICVC. See Fig. 14.
The ICVC features 4 factory programmed languages:
• English (default)
• Chinese
• Japanese
• Korean
NOTE: Pressing any one of the four softkey buttons will acti-
vate the backlight display without implementing a softkey
function.
The ICVC may be identified by viewing the back of the
plate on which the display is mounted. (Open the control panel
door to view.) Note any of the following distinguishing features
in Table 2.
OIL COOLER THERMOSTATIC
EXPANSION VALVE (TXV) BULB
OIL HEATER TERMINAL
BOX
Fig. 13 — 19XRV Compressor Controls and Sensor Locations
MOTOR TEMPERATURE
SENSOR CABLE
OIL COOLER THERMOSTATIC
EXPANSION VALVE (TXV)
Table 2 — Identification Features of the ICVC
COLOR
CONTROLLER OF
PLATE
ICVC Metallic
CHILLER CONTROL MODULE (CCM) — This module is
located in the control panel. The CCM provides the input and
outputs necessary to control the chiller. This module monitors
refrigerant pressure, entering and leaving water temperatures,
and outputs control for the guide vane actuator, oil heaters, and
oil pump. The CCM is the connection point for optional
demand limit, chilled water reset, remote temperature reset,
and motor kilowatt output.
OIL HEATER CONTACTOR (1C) — This contactor is lo-
cated in the power panel (Fig. 15) and operates the heater at
115 v. It is controlled by the PIC III to maintain oil temperature
during chiller shutdown. Refer to the control panel wiring
schematic.
OIL PUMP CONTACTOR (2C) — This contactor is locat-
ed in the power panel. It operates all 380 to 480-v oil pumps.
The PIC III energizes the contactor to turn on the oil pump as
necessary.

HOT GAS BYPASS CONTACTOR RELAY (3C)

(OPTIONAL) — This relay, located in the power panel, con-
trols the opening of the hot gas bypass valve. The PIC III ener-
gizes the relay during low load, high lift conditions.
19
COMPRESSOR OIL DISCHARGE
PRESSURE CABLE
BEARING TEMPERATURE
SENSOR CABLE
COMPRESSOR OIL SUMP
PRESSURE CABLE
COMPRESSOR OIL SUMP
TEMPERATURE CABLE
CABLE FROM
CONTROL PANEL
a19-1606
CEPL NO.
(HARDWARE) SOFTWARE
MARKINGS
CEPL
130445-03-R CESR
or 131350-0X
130445-04-R
OTHER
"PIC III"
Marking
on back
of green
circuit
board