Operation manual
21
EWWP045~06 ECB1~3MUW
Packaged water-cooled water chillers
4PW30041-1A
32~72H
P
A
NNEX
I
Thermostat parameters
The default value and the upper and lower limits of the thermostat parameters are listed in the table below.
Cooling: Inlet water temperature control of evaporator
Heating: Inlet water temperature control of condenser
The figures below show the thermostat diagram in case of inlet water temperature control.
52~72Hp
32~48Hp
■
2 step thermostat control
52~72Hp
32~48Hp
■
2 step thermostat control
■
4 step thermostat control (default 32~48Hp)
■
4 step thermostat control (default 32~48Hp)
■
6 step thermostat control (default 52~72Hp)
■
6 step thermostat control (default 52~72Hp)
0
1
2
a
b
Stepnumber
Setpoint
Temperature
0
1
2
a
b
Stepnumber
Setpoint
Temperature
0
1
4
3
2
a
b
Stepnumber
Setpoint
Temperature
0
1
4
3
2
a
b
Stepnumber
Setpoint
Temperature
0
1
6
5
4
3
2
a
b
Stepnumber
Setpoint
Temperature
0
1
6
5
4
3
2
a
b
Stepnumber
Setpoint
Temperature
INLET CONTROL
Default value
Lower limit
Upper limit
Steplength - a
(K)
1.5
0.4
2.0
Step difference - b
(K)
0.5
0.2
0.8
Load-up time
(sec)
180
15
300
Load-down time
(sec)
20
15
300
Setpoint Cooling
(°C)
12.0
8.0
23.0
Setpoint Heating
(°C)
30.0
15.0
50.0
NOTE
The thermostat parameters mentioned above only apply to standard units.
