EN/
0915/WLA Compact
/38
The factory setting of the by-pass is for operation with pumps
50 Hz.
For the correct operation with a power supply
frequency of 60 Hz it is necessary to change the
calibration of the automatic by-pass according to
the following table.
Automatic by-pass
The automatic by-pass (BPA) is located on the right side of the chiller, and is accessible by removing the right panel.
Below the setting values of the automatic by-pass recommended by the manufacturer:
WLA-WLL 12
WLA-WLL 15
WLA-WLL 22
50 Hz
60 Hz
50 Hz
60 Hz
50 Hz
60 Hz
standard pump [bar]
2,6
3,3
2,5
3,2
2,3
3,0
middle pressure pump [bar]
4,2
5,8
4,1
5,8
4,0
5,5
WLA-WLL 23
WLA-WLL 30
WLA-WLL 34
WLA-WLL 44
50 Hz
60 Hz
50 Hz
60 Hz
50 Hz
60 Hz
50 Hz
60 Hz
standard pump [bar]
2,3
3,0
3,7
4,8
3,7
4,8
3,5
4,5
middle pressure pump [bar]
4,0
5,5
5,0
6,8
5,0
6,8
4,5
6,0
To calibrate the bypass:
•
remove the right side panel of the chiller
•
close the valves on the external flow pipe
•
activate the pump and on the pressure gauge display the working
point
•
remove the top cap of the valve by-pass
•
with chiller operating and the pump turned on, act on the calibration
screw until bringing the pump within the range of correct operation
•
replace the top cap
•
open the taps on the external flow pipe.
Cappuccio
Vite di taratura
Chec
k on
MANU
AL P
AR
T II
for an
y modif
ication.
