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7. 1
GRAPHIC
-
Complete, icon-controlled manage-
ment of graphics and of interna-
tional fonts (in two sizes: 5x7 and
11x15 pixels)
-
The application software resides
on the pCO1 board only; the termi-
nal requires no additional software
to work.
5. 1
arrow KEYS
Use the arrow keys to move between
menu windows and to change the num-
bers when entering data.
7.2
key ENTER
Starts and stops the data editing sta-
ge.
7.3
Start menu"
(fig 08)
7.4
Set menu"
(fig 09)
7.5
Set menu"
In case of alarm, the red LED on the key
will light up.
Press the key once to display the alar-
ms; if there are more than one, use the
arrow keys to move from one alarm to
the next.
Press the key twice to reset the alar-
ms; resetting lasts 30", during which
RESETTING
ALARM
the display will show:
When no alarms are on, the alarm
menu will show the following window:
NO
ALARM
7
USER INTERFACE
DISPLAY
LINES KEY
1a Water inlet temperature adjustment
2a Water outlet temperature adjustment
3a ON/OFF status and COLD/HOT opera-
ting mode
COMPRESSOR STATUS KEY
I
Compressor off
Compressor on
3
ON/OFF status and COLD/HOT opera-
ting mode
LINES KEY
1
Master board water inlet temperature
2
Common board water outlet temperatu-
re
3
ON/OFF status and COLD/HOT opera-
ting mode
LINES KEY
1
Cold set
2
Hot set
3
Total differential
LINES KEY
1
2nd Cold set
2
2nd Hot set
3
Set for controlling the thermostat in
heat recovery mode
4
Differential for controlling the thermo-
stat in heat recovery mode
Special functions with 2 pumps for hydronic
circuit
Type of machines (NRA - NRC or NLW - NBW)
STEP power step request sent to each chiller
alternatively, see paragraph 6
SEE COMMUNICATION SETTINGS
MODBUS paragraph 9.
fig. 09
In 25.0 °C
Out 25.0 °C
On COLD
COMPRESSORS
1
2
3
1A
2A
3A
1B
2B
3B
Enabled when "MASTER" is on remote
On / Off
Cold / Hot
Cold
Freddo / Caldo
Freddo
Enabled when "MASTER" is on remote
Cold set
07.0 °C
Hot set
50.0 °C
Tot.Diff
05.0 °C
Enabled when "MASTER" is on remote
2nd C. Set
11.0 °C
2nd H. Set
45.0 °C
Hot set R.
45.0 °C
D. Tot R.
02.0 °C
Pump off with
Compressor off
Language
ENGLISH
Model
NRA - NRC
STEP
25%
Protocol
Modbus
Ser. address
001
Baud Rate
9600
4
4A
4B
fig. 08
On
On
13
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