Pro-Dialog Plus Control Operation; Start/Stop Control; Heating/Cooling/Standby Operation - Carrier AQUASNAP 30RB Manual De Controles Y Soluciones De Defectos

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).
ACTIVE OPERATING TYPE
LOFF L-C L-SC rEM CCN
- - - - -
- - - - -
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active

5.2 - HEATING/COOLING/STANDBY OPERATION

5.2.1 - GENERAL
The heating/cooling/standby selection applies to all units.
But only 30RB and 30RS (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 confi gured by the user (see Setpoint menu
for cooling and heating mode changeover thresholds).
100
STATUS OF PARAMETERS
MASt CHIL_S_S REMOTE
START/STOP
CONTACT
- - -
- - -
- -
- -
- Off
- -
Disable -
- -
Active - -
Active - Off
Active - -
Active Disable -
Active - -
- -
- -
- On cooling
- On heating
- On auto
Enable -
Active - -
Active - On cooling
Active - On heating
Active - On auto
Active Enable -
• 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 confi guration).
• 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.
MASTER START/STOP CCN
CONTROL SCHEDULE EMERGENCY
TYPE MODE SHUTDOWN
- - Enable
- - -
- -
- Unoccupied
- -
- Unoccupied
- -
- Unoccupied
Local Unoccupied
Remote -
Remote Unoccupied
CCN -
CCN Unoccupied
- - Disable
- Occupied Disable
- Occupied Disable
- Occupied Disable
- Occupied Disable
- Occupied Disable
Local Occupied Disable
Remote Occupied Disable
Remote Occupied Disable
Remote Occupied Disable
CCN Occupied Disable
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.
HEATING
Heating
threshold*
* This threshold does not apply to cooling only units that do not control a boiler.
CONTROL
TYPE
GENERAL
ALARM
-
-
Yes -
-
Local
- Local
- Remote
-
Remote
- CCN
- CCN
-
Local
- Remote
-
Remote
- CCN
-
CCN
No
Local
No Local
No
Remote
No
Remote
No Remote
No
CCN
No Local
No
Remote
No Remote
No Remote
No
CCN
STANDBY COOLING
Cooling
threshold
UNIT
MODE
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
On
On
On
On
On
On
On
Outdoor
temperature