1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10 IC200D 68/192
In unloading remains active the function that hestabilish the maximum operation time of a single compressor;
if a compressor remains on for the time set in CO72 (others compressors are off), it will be switched off and
another compressor (according to the logic given by CO14) is switched on.
If CO97 >0 both compressors work together for CO97 time.
The time CO48 (maximum time in unloading) is not usable for the unloading function by digital input.
23. SOLENOID VALVE FOR LIQUID INJECTION
It is possible to configure 2 valves for the liquid injection of the screw compressor (compressor 1 and
compressor 2).
When the compressor is off the solenoid valve is always OFF. When the compressor is on:
if the temperature detected by the probe mounted in the compressor increases over CO51 setpoint,
the valve is switched on
if the temperature detected by the probe mounted in the compressor decreases under C51-CO52
the valve is switched off.
24. CONDENSING UNIT OPERATION
To enable operation as condensing you must configure the parameter CF03 = 1.
In this mode the control probes are not used and the switching on of the compressors is related to the state
of the digital inputs of activation of each compressor.
24.1 OPERATION WITH DIGITAL INPUT CONFIGURED AS REGULATION REQUEST
Digital input configured as regulation request:
• if the contact is NOT ACTIVE the unit is in stand-by and the upper display shows OFF
• if the contact is ACTIVE the unit is ON and the upper display shows On if the unit is in std-by by keyboard,
or OnC if it is in chiller or OnH if it is in heat pump.
The operation mode, cooling or heating, is defined pressing the correspondent key on the keyboard; the
display shows OnC (ON chiller) or OnH (ON heat pump).
When the digital input configured as regulation request is active, a compressor is switched on; other
compressor will be activated by other digital inputs.
If the digital input is active, the unit can be switched off by keyboard; to switch on the unit is necessary:
Switch it on by keyboard
Or de-activate then activate the digital input
24.2 OPERATION WITH DIGITAL INPUT CONFIGURED AS CHILLER REGULATION
REQUEST
Digital input configured as chiller regulation request:
• if the contact is NOT ACTIVE the unit is in stand-by and the upper display shows OFF
• if the contact is ACTIVE the unit is ON and the upper display shows OnC (on chiller)
When the digital input configured as chiller regulation request is active, a compressor is switched on; other
compressor will be activated by other digital inputs.
If the digital input is active, the unit can be switched off by keyboard; to switch on the unit is necessary:
Switch it on by keyboard
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