Technical data

6 OPERATION
YCWM/YCRM series chillers are equipped with an
electronic control and monitoring system as
standard. The system provides control, monitoring
and alarm functions.
The system consists of an electronic circuit board
and a control panel with display and touch keys.
Control functions:
n
Unit capacity control
n
Compressor startup delay
n
Anti-freezing protection
Alarm management and display
n
High pressure alarm.
When the alarm is activated, the control
system locks out the associated refrigerating
circuit and opens the compressor control
chain (fail-safe mode). The alarm is reset from
the pressure switch and manually from the
panel.
n
Low pressure alarm.
When the alarm is activated, the control
system locks out the associated refrigerating
circuit. Alarm operation is delayed
approximately 30 seconds after starting.
Alarm is reset manually from the panel.
n
Anti-freezing alarm.
This alarm is activated when water
temperature at evaporator outlet drops below
3
o
C. The control system locks out the
associated refrigerating circuit. Alarm is reset
manually from the panel.
n
External interlock alarm.
When the alarm is activated, the control
system locks out the unit. Reset is automatic.
035B40022-000 6-1
+
-
SET
IN
OUT
H0
H0
2
2
P
P
-P
-P
DisplaySetpoints Circuit 1 System
Circuit 2
I
O
Models
60 to 150
Models
170 to 280
Control Panel