105
5 - PRO-DIALOG PLUS CONTROL
OPERATION
5.1 - START/STOP CONTROL
The table below summarises the unit control type and
stop or go status with regard to the following parameters.
✓
Operating type::
this is selected using the start/stop
button on the front of the user interface.
✓
Remote start/stop contacts:
these contacts are
used when the unit is in remote operating type (rEM).
See sections 3.6.2 and 3.6.3.
✓
CHIL_S_S:
thisnetwork command relates to the
chiller start/stop when the unit is in CCN control
(CCn). Variable forced to disable: the unit is halted.
Variable forced to Enable: the unit runs in accordance
with schedule 1.
✓
Start/Stop schedule:
occupied or unoccupied
status of the unit as determined by the chiller start/
stop program (Schedule #1).
✓
Master control type:
This parameter is used when
the unit is the master unit in a two chiller lead/lag
arrange-ment. The master control type determines
whether the unit is to be controlled locally, remotely
or through CCN (this parameter is a Service
configuration).
✓
CCN emergency shutdown:
if this CCN command
is activated, it shuts the unit down whatever the ac-
tive operating type.
✓
General alarm:
the unit is totally stopped due to
failure.
CHIL_S_S
-
-
-
-
-
-
Disable
-
-
-
-
Disable
-
-
-
-
-
-
Enable
-
-
-
-
Enable
REMOTE
START/STOP
CONTACT
-
-
-
-
Off
-
-
-
-
Off
-
-
-
-
-
On cooling
On heating
On auto
-
-
On cooling
On heating
On auto
-
MASTER
CONTROL
TYPE
-
-
-
-
-
-
-
-
Local
Remote
Remote
CCN
CCN
-
-
-
-
-
-
Local
Remote
Remote
Remote
CCN
START/STOP
SCHEDULE
MODE
-
-
-
Unoccupied
-
Unoccupied
-
Unoccupied
Unoccupied
-
Unoccupied
-
Unoccupied
-
Occupied
Occupied
Occupied
Occupied
Occupied
Occupied
Occupied
Occupied
Occupied
Occupied
CCN
EMERGENCY
SHUTDOWN
Enable
-
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Disable
GENERAL
ALARM
-
Yes
-
-
-
-
-
-
-
-
-
-
-
No
No
No
No
No
No
No
No
No
No
No
LOFF
-
-
Active
L-C
-
-
Active
L-SC
-
-
Active
Active
rEM
-
-
Active
Active
Active
Active
Active
CCN
-
-
Active
Active
Active
MASt
-
-
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
-
-
Local
Local
Remote
Remote
CCN
CCN
Local
Remote
Remote
CCN
CCN
Local
Local
Remote
Remote
Remote
CCN
Local
Remote
Remote
Remote
CCN
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
On
On
On
On
On
On
On
ACTIVE OPERATING TYPE
STATUS OF PARAMETERS
CONTROL
UNIT
TYPE
MODE
5.2 - HEATING/COOLING/STANDBY OPERATION
5.2.1 - GENERAL
The heating/cooling/standby selection applies to all units.
But only 30RB (liquid chillers) units, controlling a boiler
can change over to heating mode. Heating/cooling
control can be automatic or manual.
In automatic mode the outdoor temperature determines
the heating/cooling/standby changeover based on the
two threshold values configured by the user (see Setpoint
menu for cooling and heating mode changeover
thresholds). If the unit is in standby it does not cool or
heat, and no compressor can be activated. The diagram
below summarises the operating principle in automatic
mode.
Outdoor
temperature
Heating
threshold*
Cooling
threshold
*
This threshold does not apply to cooling only units that do not control a boiler.
HEATING
STANDBY
COOLING
