D
–EIMWC00408-16EN - 17/60
Unit limitation
– Electrical wiring (Optional)
The machine
’s microprocessor allows to limit the capacity by means of two separate criteria:
-
>Load limitation: The load can be varied by means of a 4-20 mA external signal from a BMS.
The signal cable must be directly connected to terminals 36 and 37 of the M3 terminal board.
The signal cable must be of the shielded type and must not be laid in the vicinity of the power cables, so as not
to induce interference with the electronic controller.
-
Current limitation: The
machine’s load can be varied by means of a 4-20 mA external signal from an external
device. In this case, current control limits must be set on the microprocessor so that the microprocessor
transmits the value of the measured current and limits it.
The signal cable must be directly connected to terminals 36 and 37 of the M3 terminal board.
The signal cable must be of the shielded type and must not be laid in the vicinity of the power cables, so as not
to induce interference with the electronic controller.
A digital input allows to enable the current limitation at the desired time. Connect the enabling switch or the
timer (clean contact) to terminals 5 and 9.
Attention: the two options cannot be enabled simultaneously. Setting one function excludes the other.
Fig. 6 - User connection to the interface terminal board
LEGEND
1S
Compressor Status 1
PS
Power Supply
2S
Compressor Status 2
Q10
Main Switch
Al
Analog Inputs
S.O. Setpoint Override
AO
Analog Output
TW1
Tower 1 Fan Step
C-3W
Condenser 3-Way Valve
TW2
Tower 2 Fan Step
C.L.
Current Limit
TW3
Tower 3 Fan Step
CFS
Condensator Flow Switch
TW4
Tower 4 Fan Step
CLE
Current Limit Enable
CP-VFD
Condenser Pump VFD
D.L.
Demand Limit
DI
Digital Inputs
DO
Digital Outputs
DPS
Double Set Point
EF
Esternal Fault
EFS
Evaporator Flow Switch
EFS-1
Evaporator Flow Switch 1
EFS-2
Evaporator Flow Switch 2
GA
General Alarm
KPC
Condensator Water Pump
KPE-1
Evaporator Water Pump 1
KPE-2
Evaporator Water Pump 2
