User manual

1592022700 User manual iCHILL 200CX Rel. 1.0 22/04/2009
29.2 CONDENSER 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 only one digital input is configured as condenser water pump alarm or only as condenser water pump alarm the active digital input
alarm stops the corresponding pump.
During the defrost and when the compressor is off in dripping time the pump is on.
30 MODULATING OPERATION OF THE PUMPS
OUT 1 and OUT 2 can be configured to manage a water pump in modulating control.
Configuration of the parameters CO15 (evaporator pump) and CO20 (condenser pump):
Evaporator water pump:
CO15=4 Continuous control type 1
CO15=5 On compressor demand
CO15=6 Continuous control type 2
Condenser water pump:
CO20=4 Continuous control type 1
CO20=5 On compressor demand
CO20=6 Continuous control type 2
Modulating control type 1
The water pump is 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 is turned off only when the unit is turned off (stand-by); in this case the pump is forced at maximum speed (parameters
CO82 and CO93) 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; when the compressor is OFF the pump is forced at CO81 or CO92 speed.
Modulating control on compressor demand
When the compressor turns on also the water pump is turned on; in this case the pump is forced at maximum speed for CO80 or CO91
seconds then the compressor is activated (after CO16 if ≠0).
When the last compressor is turned off the water pump is forced at maximum speed for CO82 or CO93 seconds and then switched off.
CO15 = 6: modulating control type 2.
The water pump is 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 or CO92 speed.
After the power on the compressor regulation starts only after the time delay CO16.
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.
Modulating control of the evaporator pump in Chiller mode:
Modulating control of the evaporator pump in Heat pump mode: