Compressor On; Remote Start/Stop Contacts; Spare Safety And Spare Temperature Inputs; Spare Alarm Contacts - Carrier AquaEdge 23XRV Start-Up, Operation And Maintenance Instructions Manual

Oil Sump Temperature Control COMPRES-
The oil heater relay (1C) is energized whenever
SOR ON —
the chiller compressor is on, and the OIL SUMP TEMP is less
than 90 F (32.2 C) and OIL SUMP TEMP is less than the
CALC EVAP SAT TEMP plus 35 °F (19.4 °C). The oil heater is
then turned off when the OIL SUMP TEMP is:
1. More than 92 F (33.3 C).
2. The OIL SUMP TEMP is warmer than the CALC EVAP
SAT TEMP plus 37 °F (20.6 °C).
For units with dual stage heater control the (1C) and (5C)
relays are turned OFF when:
1. OIL SUMP TEMP is greater than 150 F (65.6 C) or
2. Compressor RPM is greater than SUMP HEATER
TURN OFF SPEED and OIL SUMP TEMP is greater
than the CALC EVAP SAT TEMP plus SUMP TURN
OFF DELTA TEMP.
Both (1C) and (5C) relays are turned ON when:
1. Oil Pressure Delta P is less than 20 psig (138 kPa) or
2. Compressor RPM is less than SUMP HEATER TURN
ON SPEED and either the Difference between COND
REF TEMP and CALC EVAP SAT TEMP is less than
SUMP HEATER TURN ON LIFT, or COND REF
TEMP is less than COND REFRIG TEMP LOW LIMIT.
When neither of above statements are true for OFF or ON
control relay (1C) is ON.
Configurable values for dual stage heater control that allow
the service technician to adjust the heater control are located in
the SETUP3 table.
CAUTION
All oil filter isolation valves should always be left open,
except when changing the oil or the oil filter as defined in
Changing Oil and Oil Filter section, page 90. Failure to do
so may result in equipment shutdown, malfunction, or
damage.
Remote Start/Stop Contacts —
such as a timeclock that uses a set of contacts, may be used to
start and stop the chiller. However, the device should not be
programmed to start and stop the chiller in excess of 2 or
3 times every 12 hours. If more than 8 starts in 12 hours (the
STARTS IN 12 HOURS parameter on the MAINSTAT screen)
occur, an excessive starts prestart alert displays, preventing the
chiller from starting. The operator must press the
softkey on the ICVC to override the starts counter and start the
chiller. If the chiller records 12 starts (excluding recycle starts
or auto restarts after power failure) in a sliding 12-hour period,
it can be restarted only by pressing the
followed by the or
LOCAL
if the automatic system is malfunctioning, the chiller will not
repeatedly cycle on and off. If the AUTORESTART OPTION
and the REMOTE CONTACT OPTION in the OPTIONS
screen are enabled, the REMOTE CONTACTS must be closed
in order for the chiller to restart following a power failure. If
the automatic restart after a power failure option (AUTO
RESTART OPTION on the OPTIONS screen) is not enabled
when a power failure occurs, and if the remote contact is
closed, the chiller will indicate an alarm because of the loss of
voltage.
The contacts for remote start are wired into the low voltage
terminal strip in the control center cabinet (see wiring
A remote device,
RESET
softkey
RESET
softkey. This ensures that,
CCN
diagram). See the certified drawings for further details on con-
tact ratings. The contacts must have 24 vac rating.
Spare Safety and Spare Temperature Inputs —
Normally closed (NC) discrete inputs for additional field-
supplied safeties may be wired to the spare protective limits
input channel in place of the factory-installed jumper. (Wire
multiple inputs in series.) The opening of any contact will
result in a safety shutdown and a display on the ICVC. Refer to
the certified drawings for safety contact ratings.
Analog temperature sensors may also be added to the mod-
ule (SPARE TEMPERATURE #1 and #2). The analog tem-
perature sensors may be configured to cause an alert or alarm
on the CCN network. The alert will not shut the chiller down.
Configuring for alarm state will cause the chiller to shut down.
The SPARE TEMP channels can be configured for low or high
temperature limits in the SETUP1 screen.
Spare Alarm Contacts —
alarm contact is provided in the control center cabinet. The
contact ratings are provided in the certified drawings. The
contacts are located on terminals 9 and 10 of the hazardous
voltage terminal strip in the control center cabinet.
Refrigerant Leak Detector —
5 vdc input is available on the CCM module [terminal J5-5 (–)
and J5-6 (+)] for a refrigerant leak detector. Enabling REFRIG-
ERANT LEAK OPTION (OPTIONS screen) will allow the PIC
III controls to go into an alarm state at a user configured level
(REFRIG LEAK ALARM mA). The input is configured for 4 to
20 mA by setting CCM DIP switch 1 on SW2 at the ON posi-
tion, or configured for 1 to 5 vdc by setting switch 1 at the OFF
position. The output of the refrigerant leak detector is displayed
as REFRIG LEAK SENSOR PPM on the MAINSTAT screen.
For a 1 to 5 vdc input, 1 vdc input represents 4 mA displayed
and 5 vdc input represents 20 mA displayed.
4 to 20 mA Kilowatt Output —
able on the CCM module [Terminal J8-1 (+) and J8-2 (–)] to
represent the power consumption of the chiller. The 4 to 20 mA
signal generated by the CCM module can be wired to the build-
ing automation or energy management system to monitor the
chiller's energy consumption. A 4 mA signal represents the
chiller in an off state and a 20 mA signal represents the chiller
operating at its rated peak kilowatt consumption. The rated
peak kilowatt consumption is configured by the user in the VF-
D_CONF display screen by the setting the RATED LINE
KILOWATTS from the Machine Electrical Data Nameplate.
The kilowatt output is designed for use with non-grounded
controllers with a maximum input impedance of 500 ohms.
Remote Reset of Alarms —
PIC III controls is the ability to reset certain faults on a chiller
in a shutdown alarm state from a remote location. If the condi-
tion which caused the alarm has cleared the fault can be reset
and the chiller can be placed back into a normal CCN operating
mode when the REMOTE RESET OPTION (ICVC_PWD
menu) is set to ENABLE. A variety of Carrier Comfort Net-
work ® software systems including ComfortVIEW™ or Net-
work Service Tool™ can access the PIC III controls and reset
certain displayed alarms. Third-party software from building
automation systems (BAS) or energy management systems
(EMS) can also access the PIC III controls through a Carrier
LEI (Local Equipment Interface) module and reset certain
faults that are displayed. All methods would access the
ICVC_PWD screen and force the RESET ALARM? point to
YES to reset the fault condition. If the PIC III controls have de-
termined that it is safe to start the chiller the CCN MODE?
point (ICVC_PWD screen) can be forced to YES to place the
chiller back into normal CCN operating mode. The only excep-
tions are the following alarms, which cannot be reset from a re-
mote location: ALARM STATES #200, 201, 204, 206, 217,
218, 219, 220 and 236. To view alarm codes, refer to
52
One normally open trip
A 4 to 20 mA / 0 to
An output is avail-
A standard feature of the