1592015300 User manual iCHILL 200 L GB
r1.3 09/09/2005
Pg.
46/105
3.
Proportional output configured as ON/OFF
4.
Analogue input configured as digital input
have a different parameter description that allows to configure the operating mode and the corresponding polarity.
Example of programming:
The bottom display shows the parameter label (CF36) Digital input ID1 configuration;
Note that the top display shows
“c”
or
“o”
before the configuration number.
The selection
7
for the digital input ID1 (CF36) means that it is the “high pressure switch of circuit 1”.
The label “
o”
means that the digital input is active for
open
contact.
Otherwise if the selection is
7
for the digital input ID1 (CF36) = “high pressure switch of circuit 1”.
The label “
c”
means that the digital input is active for
closed
contact.
11.12 C
HANGE THE POLARITY OF THE DIGITAL
I
NPUTS
-O
UTPUTS
Enter the programming:
1. Select a parameter with digital input/output value, The top display shows the label
o
before the configuration number while the
bottom display shows the parameter label.
2. Push
SET
key: the
o
label and the configuration number are blinking, use the
UP
or
DOWN
key and select the proper polarity
( o /
c )
of the function, then push
SET
key to confirm it all.
3.
The top display blinks for some seconds and then it will shows the next parameter.
4.
To exit the programming push
SET + UP
together or wait the timeout (15seconds).
12 SELECTION AND START OF THE RUNNING MODE
12.1 S
ELECT THE
C
HILLER OR THE
H
EAT PUMP MODE
The CF79 parameter allows to select and enable the running mode:
Par. CF79 = 0:
Through keyboard, the user can start and stop the unit using the keys of the front panel.
Par. CF79 = 1:
Through digital input programmed to start/stop the unit from remote control.
•
This selection is enabled if there is one digital input configured as start/stop from remote (remote chiller / heat pump). I non of the
digital input are configure the unit remains in
stand–by
.
•
The “open” status of the input forces the chiller running mode.
•
The “closed” status of the input forces the heat pump running mode.
•
The keyboard selection is disabled.
•
The key on the front panel can start/stop the unit only with the digital input selection
Par. CF79 =2:
Automatic selection of the Chiller - Heat Pump through analogue input
The analogue input selection or change over function overrides the digital input C-HP function. If the external air temperature are within
the CF81 differential, the user can change the running mode from the keyboard.
If the unit is running with CF79 = 1 or CF79=2, and it is requested a running mode change, the controller turns off all the outputs, starts
a fixed delay time signalled by the chiller or heat pump blinking led. This blinking led indicates which running mode will be activated after
the compressor delay time protection.
12.2 C
HANGE
O
VER
To change the running status the following condition must be respected otherwise the unit remains in
stand - by:
1.
CF02=1 (heat pump selected)
2.
CF79=2 and a NTC probe configured as NTC external air temperature for dynamic setpoint/ boiler / change over
3.
This probe is working properly.
Parameters involved with the change over function:
CF80 Change over Setpoint
. If the analogue input control (from probe) function is enabled, it represents the limit temperature of the
probe value under which the unit runs the Heat Pump mode.
CF81 Change over Differential
. If the analogue input control (from probe) function is enabled, it represents the limit differential
temperature of the probe value to restart in the Chiller mode.
For external air temperature within CF81 the user can manually change the status from keyboard.
GRAPH: AUTOMATIC CHANGE OVER
Summary of Contents for ichill IC260L
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