Carrier Touch Pilot Control Series - Control Point and Active Setpoint

8.4 - Control point
The control point represents the water temperature that the unit
must produce. The control point calculation is based on the active
setpoint and its reset.
control point = active setpoint + reset
The heat exchanger entering water temperature is controlled by
default, but the heat exchanger leaving water temperature can
also be controlled (service conguration is required).
8.4.1 - Active setpoint
Three setpoints can be selected as active in Cooling mode and
two setpoints in Heating mode.
Setpoint 1 Setpoint 2 Setpoint 3
Cooling Occupied period Unoccupied period
Ice storage
cooling setpoint
Heating Occupied period Unoccupied period -
The rst cooling/heating setpoint is normally used during occupied
periods, whereas the second cooling/heating setpoint is used
during unoccupied periods. The third cooling setpoint is used for
ice storage.
Depending on the current operating type, the active setpoint can
be selected:
- By choosing the active setpoint in the General Parameters
menu (Setpoint Select, GENUNIT).
- Via the volt-free contacts (see section 4.7).
- Via network commands [SP_SEL].
- Via the schedule setting – schedule 2 (OCCPC02S).
Mode Setpoint control
Local
Regardless of the current setpoint schedule, the user can select
the setpoint manually via the control interface (Setpoint Select,
GENUNIT).
Remote
If the setpoint switch is used once, the setpoint schedule control
will be cancelled (setpoint control will be based on setpoint
switch only).
Network
Regardless of the current setpoint schedule, the user can select
the setpoint manually via the control interface (Setpoint Select,
GENUNIT) or the service tool. Once the forced selection is
deactivated, the setpoint schedule will be used again.
The following tables summarise the possible setpoint selections
based on the control type (local, remote, network) and the following
parameters:
- Heating/Cooling operating mode.
- Setpoint select.
- Setpoint selection contact status.
- Schedule 2 status for setpoint selection.
8 - STANDARD CONTROL OPERATIONS AND OPTIONS
Local operating mode
Parameters status
Active setpoint
Heat/Cool
[hc_sel]
Setpoint
[sp_sel]
Ice mode enabled
[Ice_cnfg]
Ice done switch
[Ice_sw]
Setpoint switch
[setp_sw]
Setpoint occupancy
[sp_occ]
cool sp-1 - * * - cooling setpoint 1
cool sp-2 no * * - cooling setpoint 2
cool sp-2 yes close * cooling setpoint 2
cool sp-2 yes open * ice setpoint
cool auto - * * occupied cooling setpoint 1
cool auto no * * unoccupied cooling setpoint 2
cool auto yes close * unoccupied cooling setpoint 2
cool auto yes open * unoccupied ice setpoint
heat sp-1 - * * - heating setpoint 1
heat sp-2 - * * - heating setpoint 2
heat auto - * * occupied heating setpoint 1
heat auto - * * unoccupied heating setpoint 2
(*) any conguration, (-) default conguration
Remote operating mode
Parameters status
Active setpoint
Heat/Cool
[hc_sel]
Setpoint
[sp_sel]
Ice mode enabled
[Ice_cnfg]
Ice done switch
[Ice_sw]
Setpoint switch
[setp_sw]
Setpoint occupancy
[sp_occ]
cool - - * open - cooling setpoint 1
cool - no * close - cooling setpoint 2
cool yes close close cooling setpoint 2
cool - yes open close - ice setpoint
heat - - * open - heating setpoint 1
heat - - * close - heating setpoint 2
(*) any conguration, (-) default conguration
Network operating mode
Parameters status
Active setpoint
Heat/Cool
[hc_sel]
Setpoint
[sp_sel]
Ice mode enabled
[Ice_cnfg]
Ice done switch
[Ice_sw]
Setpoint switch
[setp_sw]
Setpoint occupancy
[sp_occ]
cool - - * * occupied cooling setpoint 1
cool - - * * unoccupied cooling setpoint 2
heat - - * * occupied heating setpoint 1
heat - - * * unoccupied heating setpoint 2
(*) any conguration, (-) default conguration
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