Wye-Delta Vs Across-The-Line (Xl) Starting Option - Carrier Ecologic 30GX080-265 Controls, Start-Up, Operation, Service, And Troubleshooting

Sensor
T1 Cooler Leaving Fluid Temp
T2 Cooler Entering Fluid Temp
Motor Temp A1 Motor Temperature A1
Motor Temp A2* Motor Temperature A2
Motor Temp B1 Motor Temperature B1
T5 Discharge Gas Temp A
T6 Discharge Gas Temp B
LL-A (T3) Liquid Level Circuit A
LL-B (T4) Liquid Level Circuit B
T7 (optional)† Outdoor Air Thermistor
STP (optional)† Space Temperature
T8 (optional)† Condenser Entering Water Temp
T9 (optional)† Condenser Leaving Water Temp
Sensor
DPT-A Discharge Pressure Circuit A
SPT-A Suction Pressure Circuit A
EPT-A Economizer Pressure Circuit A
OPT-A1 Oil Pressure Compressor A1
OPT-A2* Oil Pressure Compressor A2
DPT-B Discharge Pressure Circuit B
SPT-B Suction Pressure Circuit B
EPT-B Economizer Pressure Circuit B
OPT-B Oil Pressure Compressor B
*30HX206-271 only.
†Sensors are available as accessories for field installation.
The CPM communicates on the COMM3 communication
bus to the PSIO-1 module. Proper operation of the CPM board
can be verified by observing the 3 LEDs (light-emitting di-
odes) located on the board. The top LED is red and blinks
at a rate of once every 1 to 2 seconds. This indicates that the
module is powered and operating correctly. The middle LED
is yellow and blinks when there is an automatic reset alarm
condition. The yellow LED remains on and does not blink
for manual reset alarm conditions. The bottom LED is green
and blinks when the module is satisfactorily communicating
with the PSIO-1 module. The CPM communicates the status
of its inputs and outputs, and reports 18 different alarm con-
ditions to the PSIO-1. The alarms are listed in Table 3.
The CPM module has many features that are specifi-
cally designed to protect the compressor, including re-
verse rotation protection. Do not attempt to bypass or
alter any of the factory wiring. Any compressor opera-
tion in the reverse direction will result in a compressor
failure that will require compressor replacement.
The PSIO-1 will generate an alert when it receives an alarm
input from the CPM. The alert will be generated in a y.xx
format, where ''y'' refers to the compressor and ''xx'' to the
alarm value in Table 3 (decimal point removed). For ex-
ample, the HSIO might display Alarm 1.70 for a voltage phase
reversal occurring on compressor A1. Similarly, the display
would read 5.85 for a motor overtemperature condition on
compressor B1. Alerts for compressors A2 and B2 (if present)
would be generated as ''2.xx'' and ''6.xx,'' respectively. Alarm
codes 3 and 4 would not be used. Ending zeros are not
displayed.
The high-pressure switch is wired in series with the relay
coils of the 4 relays on the CPM. If this switch opens during
Table 2 — Thermistor and Transducer Locations
THERMISTORS
Description
Cooler Head Leaving Fluid Side
Cooler Head Entering Fluid Side
Compressor A1 Junction Box
Compressor A2 Junction Box
Compressor B1 Junction Box
Top of Condenser Circuit A (30HXC Only)
Top of Oil Separator Circuit A (All Other Units)
Top of Condenser Circuit B (30HXC Only)
Top of Oil Separator Circuit B (All Other Units)
Top of Cooler Circuit A
Top of Cooler Circuit B
Outside Air Stream
Conditioned Space
Condenser Entering Fluid Line
Condenser Leaving Fluid Line
PRESSURE TRANSDUCERS
Description
Top of Condenser Circuit A (30HXC Only)
Top of Oil Separator Circuit A (All Other Units)
Top of Cooler Circuit A
Economizer Line Entering Comp A
Compressor A1 Oil Connection
Compressor A2 Oil Connection
Top of Condenser Circuit B (30HXC Only)
Top of Oil Separator Circuit B (All Other Units)
Top of Cooler Circuit B
Economizer Line Entering Comp B
Compressor B1 Oil Connection
Location
Location
operation, all relays on the CPM are deenergized and the
compressor is stopped. The failure is reported to the PSIO-1
and the processor module locks off the compressor from re-
starting until the alarm is manually reset.
Table 3 — Compressor Protection Module
Feedback Codes
ALARM CONDITION
High Pressure Switch Trip
No Motor Current
Current Imbalance Alarm 10%
Current Imbalance Warning 10%
Current Imbalance 18%
Single Phase Current Loss
High Motor Current
Ground Fault
Voltage Imbalance Alarm 3%
Voltage Imbalance Warning 3%
Voltage Imbalance 7%
Voltage Phase Reversal
Contactor Failure
Current Phase Reversal
Motor Overtemperature
Open Thermistor
Configuration Header Fault
Shorted Thermistor
No Error
Wye-Delta vs Across-the-line (XL) Starting
Option —
All 30GX,HX chillers operating at voltages of
208/230-3-60 or 230-3-50 (5 or 8 at Position 12 in model
number) are supplied with factory installed Wye-Delta start-
ers. All other voltage options can be ordered with either
Wye-Delta or XL starting options. The XL starting method
is the most cost effective and simply starts the compressor
motor in a Delta configuration (the motors are designed for
continuous operation in this configuration) using a single con-
tactor. See Fig. 2. This is the simplest starting method to use
and is ideal where starting current does not require limiting.
5
Connection Terminals
PSIO-2, J7 pins 2,3
PSIO-2, J7 pins 5,6
CPM-A1, T terminals
CPM-A2, T terminals
CPM-B1, T terminals
PSIO-2, J7 pins 8,9
PSIO-2, J7 pins 11,12
PSIO-1, J7 pins 5,6
PSIO-1, J7 pins 8,9
PSIO-2, J7 pins 20,21
PSIO-2, J7 pins 23,24
PSIO-2, J7 pins 14,15
PSIO-2, J7 pins 17,18
Connection Terminals
PSIO-1, J7 pin 22
PSIO-1, J7 pin 19
PSIO-1, J7 pin 10
PSIO-1, J7 pin 25
PSIO-1, J7 Pin 1
PSIO-1, J7 pin 16
PSIO-1, J7 pin 31
PSIO-1, J7 pin 13
PSIO-1, J7 pin 28
VALUE
1.0
2.0
2.5
2.7
3.0
3.5
4.0
5.0
5.5
5.7
6.0
7.0
7.5
8.0
8.5
9.0
9.5
10.0
0