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4
Control
4.1 Control panel
Fig.1
P
0
L
3
L
4
P6
C
L2
F
I
P1
on
alarms
enter
P2
off
O
L5
HP
High pressure
L6
LP
Low pressure
L7
TP
Pump alarm
L8
LIV
Low water level
L9
PI
Compressor alarm
L1
Power supply
PS
L
P6
L2
P1
on
enter
alarms
P2
off
L5
HP
High pressure
L6
LP
Low pressure
L7
TP
Pump alarm
L8
LIV
Low water level
L9
PI
Compressor alarm
L1
Power supply
PS
P0 Isolator switch.
P1 On key: activates the controller.
P2 Off key: deactivates the controller.
P3 UP key: used to increase the value of a modifi able parameter.
P4 DOWN key: used to decrease the value of a modifi able parameter
P5 Enter key: used to confi rm modifi cations to parameters.
P6 Alarms key: used to reset all manual reset alarms.
LED
L1: yellow
L2: green
P5
WATER
P3
IN
P4
L3: red
WATER
OUT
L4: red
L5: red
L6: red
3
L
4
L7: red
L8: red
P5
L9: red
C
F
4.2 Starting the chiller
P3
• Connect the power supply to the machine by turning the main
isolator switch QS [P0] to ON.
• Turn the chiller 'ON' by pressing the key [P1].
P4
• Set the desired temperature on the controller.
Phases Monitor
If appears on display the alarm "PI1 "(para. 4.6.1), during the start up,
the user must verify the wiring of the input terminals of the discon-
necting switch.
4.2.1
Adjustments at commissioning
a) The chiller is set for operation at a default temperature of 44.6°F (7
°C) with a differential of 7°F (4 °C); to adopt a new setting, see head-
ing 4.5..
b) Verify correct operation of the pump, using the pressure gauge (read
P1 and P0) and checking the pressure limit values (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
PCW420-650
ON
FLASHING
Controller is receiving
power
Controller is On
With the controller receiving power
and 'Off': an antifreeze heater is
on.
With the controller receiving power
and 'On': compressor called for,
but wating for a delay time to
elapse.
°C unit of measurement
°F unit of measurement
High pressure alarm
Low pressure alarm
Pump temperature alarm
USER Loop or FACTORY program-
ming mode
Low water level alarm
Compressor protection
alarm
conditions.
Check also that the amperage of the pump is within the limits indi-
cated on the data plate.
d) Switch off the chiller and proceed to top up the hydraulic circuit at
the "SET" temperature.
e) Check that the temperature of the "treated" water does not fall
below 41°F (5 °C) and that the ambient temperature in which the
hydraulic circuit operates does not fall below 41°F (5 °C). If the
temperature is too low, add the appropriate quantity of glycol, as
explained under heading 3.3.2
4.3 Stopping the chiller
When chiller operation is no longer required, turn the chiller off as fol-
lows: press key [P2] to switch the controller 'Off'.
Do not turn off the main switch QS [P0] to ensure that any antifreeze
protection devices will still receive electrical power.
4.4 Parameter settings
General
There are two levels of protection for parameters:
a) Direct (D): with immediate access, User-changeable;
b) Password protected (U): password required for access; Factory-set
parameters.
4.4.1
Chiller parameters
PARAMETER
CODE
C-F
Unit of measurement
Adr
Unit address
Remote on / off enabling
rE
(see para. 4.4.1.1).
Alarm relay management (see
rAL
para. 4.4.1.2)
Ud9
Digital output 9 confi guration
Ud10
Digital output 10 confi guration
AtP
Pump thermal alarm management
HUL
Chiller hour counter
HUH
Chiller hour counter
Chiller hour counter alarm
tHU
threshold
4.4.1.1 Remote On / Off mode
0
Remote On/Off disabled
1
Remote On/Off enabled together with local On/Off
2
Remote On/Off only, local On/Off disabled
4/8
TYPE
DEFAULT
0
U
1
U
0
U
0
U
0
U
0
U
1
U
-
U
-
U
0
U
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