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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: this network command relates to the chiller
start/stop when the unit is in CCN control (CCn). Vari-
able 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). Used when the unit is equipped with an
optional CCN/clock board, otherwise the chiller occupied
mode is forced to occupied all the time.
- 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 active
operating type.
- General alarm: the unit is totally stopped due to failure.
The current heat/cool operating mode on the unit is indicated
by item 4 in the Information menu and by the heat/cool LEDs
on the summary interface.
ON/OFF
STATUS
Off
On
On
On
On
On
On
CONTROL TYPE
-
Local
Local
Remote
Remote
CCN
CCN
HEATING/COOLING
SELECTION IN LOCAL MODE
-
Cooling
Heating
-
-
-
-
REMOTE HEATING/
COOLING CONTACTS
-
-
-
Cooling mode
Heating mode
-
-
HC_SEL
-
-
-
-
-
Cooling
Heating
OPERATING MODE
Cooling
Cooling
Heating
Cooling
Heating
Cooling
Heating
PARAMETER STATUS
ACTIVE OPERATING TYPE STATUS OF PARAMETERS CONTROL UNIT
TYPE MODE
REMOTE MASTER START/STOP CCN GENERAL
START/STOP CONTROL SCHEDULE EMERGENCY ALARM
LOFF L-ON L-SC rEM CCN MASt CHIL_S_S CONTACT TYPE MODE SHUTDOWN
- - - - - - - - - - Enable - - Off
------- - -. -. - Yes - Off
Active - - - - - - - - - - - Local Off
- - Active - - - - - - Unoccupied - - Local Off
- - - Active - - - Off - - - - Remote Off
- - - Active - - - - - Unoccupied - - Remote Off
- - - - Active - Disable - - - - - CCN Off
- - - - Active - - - - Unoccupied - - CCN Off
- - - - - Active - - Local Unoccupied - - Local Off
- - - - - Active - Off Remote - - - Remote Off
- - - - - Active - - Remote Unoccupied - - Remote Off
- - - - - Active Disable - CCN - - - CCN Off
- - - - - Active - - CCN Unoccupied - - CCN Off
- Active - - - - - - - - Disable No Local On
- - Active - - - - - - Occupied Disable No Local On
- - - Active - - - On - Occupied Dsable No Remote On
- - - - Active - Enable - - Occupied Disable No CCN On
- - - - - Active - - Local Occupied Disable No Local On
- - - - - Active - On Remote Occupied Disable No Remote On
- - - - - Active Enable - CCN Occupied Disable No CCN On
5.2 - Heating/cooling selection
On heat pumps, heating/cooling selection can be controlled
differently depending on the active operating type:
• Locally on the unit, using operating types L-C1, L-C2,
LC1r and LC2r (for cooling) and L-H (for heating).
• Remotely using the heat/cool selection volt-free contact
when the unit is in Remote operating type (rEM).
• Via a CCN command when the unit is in CCN operating
type (CCn).