User manual

1592022700 User manual iCHILL 200CX Rel. 1.0 22/04/2009
When the unit is in stand-by or remote off and the parameter Ar21=1, if the antifreeze thermoregulation requires the water pump is
turned on.
CO15 = 4: modulating control type 1.
The water pump/ supply fan are running only if the unit is running (in chiller or heat pump). After giving the start in chiller or heat pump
mode the compressor regulation starts only after the time delay CO16.
The water pump / supply fan are turned off only when the unit is turned off (stand-by/remote OFF); in this case the pump is forced at
maximum speed and then switched off.
When the unit is in stand-by or remote off and the parameter Ar21=1, if the antifreeze thermoregulation requires the water pump is
turned on.
The pump, if activated, works as described below (par. 38); when the compressor is OFF or when the unit is in OFF or STD-BY the
pump is forced at CO81 speed.
CO15 = 5: modulating control on compressor demand.
When the compressor turns on also the water pump/ supply fan are turned on; in this case the pump is forced at maximum speed for
CO80 seconds then the compressor is activated (after CO16 if ≠0).
When the last compressor is turned off the water pump/ supply fan is forced at maximun speed for CO82 seconds and then switched
off.
The pump, if activated, works as described below (par. 38)
CO15 = 6: modulating control type 2.
The water pump / supply fan are always running (if the unit is running in chiller or heat pump but also if the unit is OFF or STD-BY);
when the unit is OFF or STD-BY or when the compressor is OFF the pump is forced at CO81 speed.
After the power on the compressor regulation starts only after the time delay CO16 from pump activation.
When the unit is in stand-by or remote off and the parameter Ar21=1, if the antifreeze thermoregulation requires the water pump is
turned on.
The pump, if activated, works as described below (par. 38).
During the defrost and when the compressor is off in dripping time the pump/supply fan is on.
26.2 HOT START (SUPPLY FAN) ONLY FOR AIR / AIR UNIT IN HEAT PUMP MODE
The hot start function is available only for air/air unit configured with heat pump and it is active only during the heat pump mode.
It allows to start the supply fan only if the evaporating/condensing probe temperature is hot enough to avoid to introduce cold air flows.
FA24 Hot start Setpoint.
It is the temperature setpoint to stop the supply fan when the NTC probe of the evaporator #1 output or the evaporator #2 output or the
evaporator common output value is lower.
FA25 Hot start differential
Temperature differential of the hot start function.
26.3 SUPPLY FAN OPERATION WITH DIGITAL INPUT AND RTC
This function can be enabled only if the controller has the clock on board.
If a digital input is configured as “operation with only supplay fans”, the supplay fan are activated according to digital input status and
time band to power on/off the unit (by clock on board).
27 EVAPORATOR PUMP GROUP
If two relay outputs are configured as evaporator water pump and support pump automatically the pump group control is enabled.
First start-up of the unit with running hours of the two pumps are both 0: if CO15=1 or 2 (continuous or on compressor demand pump
mode) by default the pump n°1 is turned on. The successive restart of the unit is made with the pump n°2.
During the normal functioning condition when the unit changes from a stand-by /remote off/ power off status to chiller or heat pump
mode the pump that is running is switched off and immediately the one with less running hours is turned on.
When the unit goes in stand-by or remote off the pump stays on for the time set in CO17; next pump to be activated is the pump with
less working hours.
When the unit is in stand-by or remote off and the parameter Ar21=1, if the antifreeze thermoregulation requires the water pump is
turned on.
27.1 EVAPORATOR WATER PUMP ROTATION
Par. CO18≠
≠≠
≠0 to enable the function.
During the normal functionning condition if one pump reaches the running hours of the CO18 parameter, the pump is turned off while
the other pump is activated.
If the CO19≠
≠≠
≠0, before changing from one to the other, the two pumps work together for the time set in this parameter. If CO19=0 the
rotation is immediate.
ATTENTION
The CO16/CO17 values (on and off delay between compressors and pumps) are calculated also for the pump group.
27.2 EVAPORATOR WATER PUMP ROTATION THROUGH DIGITAL INPUT CONTROL
With two digital inputs configured as overload alarm of water pump and support pump the rotation is enabled when the digital input of
the running pump becomes active. That pump is turned off while the other is forced on.
If the digital inputs are configured as evaporator water pump alarm and condenser water pump alarm the active digital input alarm stops
the corresponding pump.