Compressor Protection Module (Cpm) - Carrier AQUAFORCE 30XW150-400 Operation & Service Manual

DESCRIPTION
Power (24 vac supply)
Local Equipment Network
Carrier Communication
Network
Chilled Water Flow Switch
Demand Limit Switch No. 1
Condenser Flow Switch
Circuit A Discharge
Pressure Transducer
Circuit B Discharge
Pressure Transducer
Dual Chiller
LWT Thermistor
Dual Set Point Input
Heat/Cool Switch
Entering Water Thermistor
Leaving Water Thermistor
Condenser Entering Water
Thermistor
Condenser Leaving Water
Thermistor
External Chilled
Water Pump Interlock
Circuit A Suction
Pressure Transducer
Circuit B Suction
Pressure Transducer
Unit Status
Alarm Relay
Alert Relay
Cooler Pump Relay 1
Cooler Pump Relay 2
Condenser Pump Relay
Pump #1 Interlock
Pump #2 Interlock
LEGEND
I/O — Input or Output
LWT — Leaving Water Temperature
Compressor Protection Module (CPM) —
is one CPM per compressor. See Fig. 9. The device controls the
compressor contactors, oil solenoid, and loading/unloading the
solenoid. The CPM also monitors the compressor motor tem-
perature, high pressure switch, oil level switch, discharge gas
temperature, oil pressure transducer, motor current, MTA
(must trip amps) setting and economizer pressure transducer
(sizes 175,200,350,400 only). The CPM responds to com-
mands from the MBB (Main Base Board) and sends the MBB
the results of the channels it monitors via the LEN (Local
Table 3 — Main Base Board Inputs and Outputs
INPUT/OUTPUT
—
—
—
CWFS
Demand Limit SW1
CDFS
DPTA Pressure Transducer
DPTB Pressure Transducer
DUAL
Dual Set Point
HC_SW
EWT
LWT
CEWT
CLWT
PMPI
SPTA Pressure Transducer
SPTB Pressure Transducer
Remote Contact-Off-Enable
ALM R
ALT R
PMP1
PMP2
CPMP
PMP_1
PMP_2
There
I/O TYPE DISPLAY MODULE POINT NAME
—
—
—
Switch Cooler Flow Switch, LOCK
Switch Limit Switch 1 Status, DLS1
Switch Condenser Flow Switch, COND
Discharge Pressure, DP.A
Discharge Pressure, DP.B
5k Thermistor CHWS Temperature, CHWS
Switch Remote Setpoint Switch, DUAL
Switch Heat/Cool Select Contact, HC_SW
5k Thermistor Cooler Entering Fluid, EWT
5k Thermistor Cooler Leaving Fluid, LWT
5k Thermistor Condenser Entering Fluid, CEWT
5k Thermistor Condenser Leaving Fluid, CLWT
Switch Electrical Box Interlock, ELEC
Suction Pressure, SP.A
Suction Pressure, SP.B
Switch On/Off Remote Switch, ONOF
Relay Alarm Relay Output, ALRM
Relay Alert Relay Output, ALRT
Contactor Cooler Pump 1, CPUMP_1
Contactor Cooler Pump 2, CPUMP_2
Contactor Condenser Pump, COND_PMP
Switch Cooler Pump Run Status, PUMP
Equipment Network). The CPM has three DIP switch input
banks, Switch 1 (S1), Switch 2 (S2), and Switch 3 (S3). The
CPM board DIP switch (S1) configures the board for the type
of starter, the location and type of the current transformers and
contactor failure instructions. See Table 4 for description of
DIP switch 1 (S1) inputs. See Appendix D for DIP switch
settings.
10
CONNECTION POINT
Pin Notation
MBB-J1, MBB-J1A,
MBB-J1B
—
11
12
MBB-J9A, MBB-J9B,
MBB-J9C, MBBJ9D
+ RS485 Port (D+)
—
G RS485 Port (Gnd)
- RS485 Port (D-)
MBB-J12
+ RS485 Port (D+)
—
G RS485 Port (Gnd)
- RS485 Port (D-)
MBB-J5B-CH17
17
MBB-J4-CH13
16A MBB-J5A-CH16A
MBB-J7A-CH6
5V +5 vdc Ref.
S
R
MBB-J7C-CH8
5V +5 vdc Ref.
S
R
MBB-J6-CH3
MBB-J4-CH12
MBB-J4-CH14
MBB-J6-CH2
MBB-J6-CH1
MBB-J6-CH5
MBB-J6-CH4
MBB-J4-CH15A
MBB-J7B-CH7
5V +5 vdc Ref.
S
R
MBB-J7D-CH9
5V +5 vdc Ref.
S
R
MBB-J4-CH11
MBB-J3-CH24
MBB-J3-CH25
MBB-J2A-CH19
MBB-J2A-CH20
MBB-J2C-CH22
MBB-J5C-CH18
24 vac
Ground
Signal
Return
Signal
Return
Signal
Return
Signal
Return