To Change The Password; To Change The Icvc Display From English To Metric Units; Modify Controller Identification If Necessary; Input Equipment Service Parameters - Carrier AquaEdge 23XRV Start-Up, Operation And Maintenance Instructions Manual

one chiller at the jobsite, change the ICVC CCN address on
each chiller so that each chiller has its own address. Note and
record the new address. Change the screen to Metric (SI) units
as required, and change the ICVC password if desired.
TO CHANGE THE PASSWORD — The password may be
changed from the ICVC CONFIGURATION screen.
1. Press the and
MENU
current password and highlight ICVC CONFIGURA-
TION. Press the
SELECT
entries on the ICVC CONFIG screen can be changed:
BUS #, ADDRESS #, BAUD RATE, US IMP/METRIC,
PASSWORD, and LID LANGUAGE.
2. Use the softkey to scroll to PASSWORD. The
ENTER
first digit of the password is highlighted on the screen.
3. To change the digit, press the
DECREASE softkey. When the desired digit is seen,
press the softkey.
ENTER
4. The next digit is highlighted. Change it, and the third
and fourth digits in the same way the first was
changed.
5. After the last password digit is changed, the ICVC
goes to the LID LANGUAGE parameter. Press the
softkey to leave that screen and return to the
EXIT
SERVICE menu.
IMPORTANT: Be sure to remember the password. Retain
a copy for future reference. Without the password, access
to the SERVICE menu will not be possible unless the
ICVC_PWD menu on the STATUS screen is accessed by
a Carrier representative
TO CHANGE THE ICVC DISPLAY FROM ENGLISH TO
METRIC UNITS — By default, the ICVC displays informa-
tion in English units. To change to metric units, access the
ICVC CONFIGURATION screen:
1. Press the and
MENU
password and highlight ICVC CONFIGURATION.
Press the softkey.
SELECT
2. Use the softkey to scroll to US imp or
ENTER
METRIC.
3. Press the softkey that corresponds to the units desired for
display on the ICVC (e.g., US imp or METRIC).
MODIFY CONTROLLER IDENTIFICATION IF NECES-
SARY — The ICVC module address can be changed from the
ICVC CONFIGURATION screen. Change this address for
each chiller if there is more than one chiller at the jobsite. Write
the new address on the ICVC module for future reference.
INPUT EQUIPMENT SERVICE PARAMETERS IF NEC-
ESSARY — The EQUIPMENT SERVICE table has seven
service tables:
1. OPTIONS
2. SETUP1
3. SETUP2
4. SETUP3
5. SETUP4 (P Compressor)
6. SETUP5 (P Compressor)
7. LEADLAG
8. RAMP_DEM
9. TEMP_CTL
softkeys. Enter the
SERVICE
softkey. Only the last 6
INCREASE
softkeys. Enter the
SERVICE
Check VFD_CONFIG TABLE — Enter the VFD_CONF
screen on the ICVC by entering the following screen
sequence:
• MENU
• SERVICE
• Password (default 1111)
• VFD CONFIG DATA
• Password (default 4444)
• VFD_CONF
Confirm that the following parameters in the VFD_CONF
screen match the values on the Machine Electrical Data Name-
plate (see Fig. 48):
• Motor Nameplate Voltage — Voltage required to run at
motor rating.
• Compressor 100% Speed — Compressor speed required to
run at chiller design point.
• Rated Line Voltage — Nominal line voltage selected for the
or
job site.
• Rated Line Amps — Line current required for the chiller to
run at the design point.
• Rated Line Kilowatts — Line power required for the chiller
to run at the design point.
• Motor Rated Load kW — Power consumed by the motor
when running at the chiller design point.
• Motor Rated Load Amps — Motor current required for the
chiller to run at the design point.
• Motor Nameplate Amps — Motor nameplate full load
amps.
• Motor Nameplate RPM — Rated speed of the motor
when running at motor nameplate rated frequency, rated
current, and rated voltage.
• Motor Nameplate kW — Motor nameplate rated power.
• Inverter PWM Frequency — Sets the carrier frequency
for the pulse width modulation output.
NOTE: Other parameters on these screens are normally left at
the default settings; however, they may be changed by the
operator as required. The voltage and current imbalance level
and imbalance persistence time on the VFD_CONF table can
be adjusted to increase or decrease the sensitivity of these fault
conditions. Increasing time or persistence decreases sensitivity.
Decreasing time or persistence increases sensitivity to the fault
condition.
Modify Minimum and Maximum Load Points (HGBP
DELTA T1/ HGBP DELTA P1, HGBP DELTA T2/ HGBP
DELTA P2) If Necessary — The default settings of the stall
prevention parameters in the OPTIONS screen are set so the
optional HGBP will not be energized during normal operating
conditions. In addition to stall prevention, hot gas bypass may
be useful for preventing excessive recycle restarts and main-
taining temperature control in response to rapid load changes at
low compressor speed. The chiller needs only to close the
optional hot gas bypass valve to increase capacity when the
chiller is running at low load with hot gas bypass active. It
takes a few minutes for the chiller to start if it has shut down in
recycle restart mode.
When HGBP option is set to 1, hot gas bypass operation can
be adjusted for minimum chiller load and lift control. The
HGBP DELTA T1/HGBP DELTA P1, HGBP DELTA T2/
HGBP DELTA P2 parameters in the OPTIONS screen deter-
mine when the optional hot gas bypass valve will open and
close. These points should be set based on individual chiller
operating conditions.
An example of such a configuration is shown below.
Refrigerant: HFC-134a
Estimated Minimum Load Conditions:
44 F (6.7 C) LCL
45.5 F (7.5 C) ECL
43 F (6.1 C) Suction Temperature
70 F (21.1 C) Condensing Temperature
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