Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 53 of 151
Unloading function is disabled when the temperature of all the probes configured rise over CO55 + CO56 or
when the CO57 time is elapsed.
27. 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.
28. EVAPORATOR WATER PUMP / SUPPLY FAN (AIR/AIR UNIT)
Water pump / supply fan operation mode:
CO16=0: Not enabled: water pump/supply fan is not managed.
Attention:
The air / air unit configured with CO16= 0 does not manage the output for integration heaters.
CO16 = 1: Continuous control
The water pump / supply fan is ON only if the unit is running (chiller or heat pump).
When the Ichill is switched on in chiller or heat pump, the water pump is immediately activated and the first
compressor is switched on after CO17 delay.
When the Ichill is in STD-BY or remote OFF the water pump is OFF (with a delay if CO18>0).
The parameter Ar09 allows to set the status of the water pump in case of antifreeze if the Ichill is in stand-by.
CO16 = 2: on compressor demand
The water pump / supply fan is ON only if at least a compressor is ON; in case of compressor activation, the
water pump is switched on CO17 before the compressor.
When the last compressor is switched off, the water pump / supply fan is switched off after CO18 delay from
compressor.
When the unit is in stand-by or remote off and the Ar09 =1, if the regulation requires the antifreeze heaters
also the water pump is turned on.
The pump is always off when:
 Remote OFF from digital input.
 Water pump overload.
 Evaporator flow switch alarm if MANUAL reset.
During the defrost and when the compressor is off in dripping time the water pump/supply fan is on.
28.1 Evaporator Pump Group
It is possible to configure two evaporator water pumps; the water pump to be activated is the pump with less
working hours.
When a water pump works continuosly for CO19 time, the other one is switched on and after CO20 second
the first one is switched off.
If a water pump overload occurs, the water pump is switched off and the other one is switched on.
Note: During the defrost and when the compressor is off in dripping time, the pump is on.