EWYQ080~250DAYN
Packaged air-cooled water chillers
4PW35559-1D – 03.2011
Installation manual
11
Defining the BMS settings (option kit EKACPG)
Enter the
COMMUNICATION
submenu through the service menu.
The BMS parameters allowing communication between the unit and
the supervisory system can be modified with the second
COMMUNICATION PCB
and the last
COMMUNICATION
screen of the service menu. The BMS parameters are:
COMMUNICATION PCB
screen:
■
RS485
: indicates the serial connection
MODBUS
or
NONE
.
■
ADDR
: used to address the PCB.
■
BR
: indicates the speed of communication (Baud rate).
The possible settings are:
1200
,
2400
,
4800
,
9600
, and
19200
.
■
PARITY
: indicates the parity,
NONE (2STOPb)
with 2
stopbits, or
ODD
/
EVEN
with 1 stopbit
(1STOPb)
.
COMMUNICATION
screen:
■
BMS CONTROL ALLOWED
: if set to
Y
(yes), the unit can be
commanded and configured from a supervisory system. If set to
N
(no), the supervisory system can only read out values but
cannot modify them.
Defining the thermostat settings
■
For a stand-alone unit
Enter the first screen of the
THERMOSTAT
submenu through
the service menu.
Defining the thermostat settings for inlet or outlet water
temperature of
A
and
C
can only be set in the service menu.
■
For a unit connected in a DICN setup.
Enter, on the master unit only, the fourth screen of the
DICN
submenu through the service menu.
Defining the DICN thermostat settings for inlet water
temperature of
A
,
B
and
C
can only be set in the service menu.
H
OW
TO
CONTINUE
After installation and connection of the packaged air-cooled water
chiller, the complete system must be checked and tested as
described in "Checks before initial start-up" in the operation manual
supplied with the unit.
Fill out the brief operation instructions form and fix it visibly near the
operating site of the refrigeration system.
N
OTES
To define the thermostat settings of the
inlet or outlet water temperature.
To define the thermostat settings of the
inlet water temperature.
_ THERMOSTAT
STEPLENGTH
A:2$0¢ C:0$4¢
RESTART COND.:Ax2
_^ DICN THERMOSTAT
STEPLENGTH
A:3$0¢ B:3$6¢ C:0$4¢
