1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10
IC200D
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25.2 MODULATING EVAPORATOR WATER PUMP
To enable the modulating
evaporator water pump is necessary to configure an analog output as “Modulated
evaporator water pump” (see analog and digital output configuration) .
The modulating evaporator water pump is enabled in cooling, heating and domestic hot water production; if
the machine is in STD-BY or OFF the water pump is OFF.
The water pump works according the Dt between two probes, which can be choosen both in summer an
winter mode, among those configured in the instrument (Pb1, Pb2,…).
If the state of the water pump is tied to the state of the compressor, when last compressor is switched off the
water pump is forced to run at US60 speed for CO18 minutes, then it is switched off.
If the state of the water pump is not tied to the state of the compressor, when last compressor is switched off
the water pump is forced to run at US60 speed.
The regulation is done as showed below.
Chiller and c domestic hot water (machine with valves OUt1 and OUT2 in the gas circuit)
Parameter
Description
min
max
udm
US 47
Probe 1 selection for evaporator water pump modulation in chiller
0
10
US 48
Probe 2 selection for evaporator water pump modulation in chiller
0
10
US 49
Set point for maximum speed of modulationg evaporator water pump in chiller
30.0
-58
0.0
0
70.0
158
50.0
725
°C
°F
Bar
Psi
Dec
int
Dec
int
US 50
Proportional band for maximum speed of modulationg evaporator water pump
in chiller
0.0
0
0.0
0
25.0
45
14.0
203
°C
°F
Bar
Psi
Dec
int
Dec
int
US 51
Minimum speed of the evaporator water pump in chiller
0
100
%
US 52
Maximum speed of the evaporator water pump in chiller
0
100
%
Heat pump and domestic hot water
