1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 70 of 149
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 CO23>0).
The parameter Ar09 allows to set the status of the water pump in case of antifreeze if the Ichill is in stand-by.
CO21
= 2:
on compressor demand
The water pump 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 is switched off after CO23 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.
Condenser 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.
32.1 Condenser Pump Group
It is possible to configure two condenser water pumps; the water pump to be activated is the pump with less
working hours.
When a water pump works continuosly for CO24 time, the other one is switched on and after CO25 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.
33. CYCLIC OPERATION OF THE WATER PUMPS
If the water pump is OFF (reached set point), is possible to enable it to run to detect the right water
temperature.
At the end of the ON time, the controller verify if is necessary to switch on the compressor/s or not; if is not
necessary, the water pump is switched OFF for CO85 time and then switched on for another CO87 ON
cycle.
Parameters
Description
min
max
unit
of
measure
CO 85
Evaporator water pump OFF time if the set point is reached
0
250
10 min
CO 86
Evaporator water pump OFF time if the machine is STD-BY or
OFF
0
250
10 hour
CO 87
Evaporator water pump ON time
0
250
10 Sec
CO 88
Condenser water pump OFF time if the set point is reached
0
250
10 min
CO 89
Condenser water pump OFF time if the machine is STD-BY or
OFF
0
250
10 hour
