Carrier Touch Pilot - Actuators and Water Flow Switch; Customer Terminal Block Connections

7
Motor temperature sensor
This sensor is used to control the motor temperature of each
compressor.
Temperature setpoint reset sensor (EMM)
This 4-20 mA space temperature sensor can be installed
remotely from the unit. It is used to reset the setpoint on the
unit.
Master/slave water sensor (optional)
    
assembly control.
3.7 - Actuators
Water pumps
The controller can regulate one condenser pump as well as


Electronic Expansion Valve


    
     
  
controlled linear stepper motor. The high degree of accuracy


Water ow switch


    
made automatically at the start-up. If the measured water

rate, the alarm condition shuts off the unit.
3.8 - Connections at the customer terminal block

depending on the selected options.
IMPORTANT: Some contacts can be accessed only when
the unit operates in Remote mode.
3.8.1 - Terminal block connections
The following table summarizes connections at the user
terminal block.
Description Board Connector Remarks
Remote on/o contact SIOB, cir A DI-01; 32-33 Used for the unit on/o control if the unit is in Remote mode
Remote setpoint contact SIOB, cir A DI-02; 65-66 Used to control the setpoint
Demand limit contact SIOB, cir A DI-03; 63-64 Used to control demand limit
Remote heat/cool contact SIOB, cir A DI-04; 73-74 Used to select heat/cool mode
Alarm relay SIOB, cir A DO-05; 30A-31A Indicates alarms
Running relay SIOB, cir A DO-06; 37-38 Indicates if the unit is ready to start or operating
Occupancy override SIOB, EMM DI-01; 77-78 Enables to switch between occupied (closed contact) and unoccupied
mode (open contact)
Demand limit contact 2 SIOB, EMM DI-02; 73A-74A Used to control demand limit
Customer interlock SIOB, EMM DI-03; 34A-35A Used for the customer safety loops
Ice done contact SIOB, EMM DI-04; 75-76 Used for ice storage control
Unit partially shutdown SIOB, EMM DO-05; 30B-31B Indicates the shutdown of one of the circuits
Unit shut down SIOB, EMM DO-06; 30-31 Indicates the unit shutdown
3.8.2 - Volt-free contact (on/off and cooling/heating)
On/off contacts and cooling/heating contacts are as follows:
 Cooling Heating
 open closed closed
Cooling/Heating contact open open closed
O: Unit is stopped
Cooling: Unit is allowed to start in Cooling
Heating: Unit is allowed to start in Heating
3.8.3 - Volt-free setpoint selection contact


used to switch between setpoints.
Setpoint
contact
Active setpoint
Cooling Heating
CSP1 CSP2 HSP1 HSP2
SP_SW open close open close
csp = cooling setpoint
hsp = heating setpoint
3.8.4 - Volt-free demand limit selection contact
Up to two dry contacts can be used to limit unit capacity
(LIM_SW1 and LIM_SW2). The second contact (LIM_SW2)
      
module (EMM).
Capacity limitation with two contacts is as follows:
100% Limit 1 Limit 2 Limit 3
Demand limit 1 contact
(LIM_SW1)
open closed open closed
Demand limit 2 contact
(LIM_SW2)
open open closed closed
3.8.5 - Ice storage (EMM)
For units with EMM option, the control includes an additional
setpoint (“ice setpoint”) used for ice storage control.
Cooling setpoint
CSP1 CSP2 ICE_STP
Occupancy schedule occupied unoccupied unoccupied
Ice done switch open/closed closed open
csp = cooling setpoint
ice_stp = ice setpoint