English
4/10
PCW420-650
4 Control
4.1 Control panel
Display
P0
Isolator switch.
P1
Shows alarms on the display, switches off
the buzzer if activated and resets alarms.
P2
Enables access to the menu for selecting
the group of parameters.
P3
Cancels an operation.
P4
Shifts the cursor or increases the value of a
parameter.
P5
Shifts the cursor or decreases the value of a
parameter.
P6
Shifts the cursor from one parameter to
another or con rms a parameter.
LED ON OFF FLASHING
P1
- No Alarm Alarm present.
P2
Machine
ON
Machine
OFF
-
! Attention: Wait boot start up of “30 seconds”.
4.2 Starting the chiller
4.2.1 Compressor heating
• Connect the power supply to the machine by turning the
main isolator switch QS [P0] to ON.
(Only for FL2 option:
!Y THE CRANKCASE HEATER
MUST BE ACTIVATED 24 HOURS BEFORE STARTING THE
MACHINE).
Incorrect operation can damage the compressor.
• Switch the chiller ON as shown in the gure.
• Set the desired temperature on the controller.
Start
Status Unit : OFF
Pump :
Comp 1: Comp 3:
Comp 2: Comp 4:
Press the button (P2) to enter in the “main” menu.
Press the button
(P5) to select the parameter “On”.
Main menu 1/7
On
OFF
USER
Press the button (P6) to con rm.
ON
the message “ON” appears with the arrow ashing.
Press the button
(P6) to start the chiller.
Water Outlet Temp.
b1 : 45.0 °F
Pump :
Comp 1: Comp 3:
Comp 2: Comp 4:
Symbol Status Description
xed OFF
xed ON
ashing Waiting to leave
4.2.2 Adjustments at commissioning
a) The chiller is set for operation at a default temperature of
45°F (7°C) with a differential of 7.2°F (4 °C); to adopt a new
setting, see eading 4.5.
b) Verify correct operation of the pump, using the pressure
gauge (read P1 and P0) and checking the pressure limit val-
ues (Pmax and Pmin) indicated on the pump data plate.
P1 = pressure with pump ON
P0 = pressure with pump OFF
Pmin < (P1-P0) < Pmax
- Example n°1.
Conditions:
closed circuit, pressure P0 = 29 PSIg (2 bar)
pump data plate values: Pmin 14PSIg(1 bar)/ Pmax 43PSIg
(3 bar)
adjust the valve outlet to give a pressure of
43PSIg (3 bar) < P1< 72PSIg (5 bar)
- Example n°2.
Conditions:
open circuit, pressure P0 = 0 PSIg (0 bar)
pump data plate values: Pmin 14PSIg(1 bar)/ Pmax 43PSIg
(3 bar)
adjust the valve outlet to give a pressure of
Pmin 14PSIg(1 bar)/ Pmax 43PSIg (3 bar)
c) Verify correct operation of the pump similarly under normal
running conditions.
Check also that the amperage of the pump is within the limits
indicated on the data plate.
d) Switch off the chiller and proceed to top up the hydraulic
circuit at the “SET” temperature.
Display
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