Carrier 30XA Operation Instructions Manual

Carrier 30XA Operation Instructions Manual Manual pdf 8 page image

83.9 - Connections at the user terminal blockConnections available at the user terminal block may varydepending on the selected options.Terminal block connectionsDescription Board Input/Output Connector RemarksOn/Off switch SIOB, circuit A DI-01 J1 Used for the unit on/off control if the unit is in Remote modeSecond setpoint switch SIOB, circuit A DI-02 J1 The contact is taken into consideration if the unit is in Remote modeDemand limit switch 1 SIOB, circuit A DI-03 J1 Used to control demand limit. See section 7.7Heat cool select status SIOB, circuit A DI-04 J1 Used to select heat cool modeCondenser flow status (30XW only) SIOB, circuit A DI-08 J1 Used to control the condenser statusSetpoint reset control SIOB, circuit A AI-10 J9 Allows the customer to reset the currently selected setpointAlarm relay SIOB, circuit A DO-05 J23 Indicates alarmsRunning relay SIOB, circuit A DO-06 J22 Indicates if the unit is ready to start or operatingOptionalOccupancy override SIOB, EMM DI-01 J1 Enables to switch between occupied (closed contact) andunoccupied mode (open contact)Demand limit switch 2 SIOB, EMM DI-02 J1 Used to control demand limit. See section 7.7Customer interlock SIOB, EMM DI-03 J1 Used for the customer safety loopsIce done contact SIOB, EMM DI-04 J1 Used to control the setpoint according to the occupancy scheduleCapacity limit control SIOB, EMM AI-10 J9 Used for capacity limitationChiller partially shutdown SIOB, EMM DO-05 J23 Indicates the shutdown of one of the circuitsChiller shutdown SIOB, EMM DO-06 J22 Indicates the unit shutdownChiller capacity running output (0 to 10 V) SIOB, EMM AO-01 J10 Reports the capacity percentage of the unitHeat reclaim condenser flow status (30XA only) SIOB, Heat reclaim DI-01 J1 Used to verify the water flow on the condenser sideHeat reclaim enable switch (30XA only) SIOB, Heat reclaim DI-02 J1 Used to switch between air-condenser (open contact) and watercondenser (closed contact) in Remote modeFree cooling disable switch (30XA only) SIOB, Free cooling DI-01 J1 Used to control free cooling when the unit is in Remote mode3.9.2 - Volt-free contact on/off/cooling/heatingIf the unit operates in Remote mode, on/off contacts andheating/cooling contacts operate as follows:Without multiplexingOff Cooling HeatingOn/Off contact open closed closedCooling/heating contact - open closedWith multiplexingOff Cooling Heating AutoOn/Off contact open closed closed openCooling/heating contact open open closed closedLegend:1. Off: Unit is stopped2. Cooling: Unit is allowed to start in Cooling3. Heating: Unit is allowed to start in Heating4. Auto: Unit can run in Cooling or Heating in accordance with the changeovervalues.3.9.3 - Volt-free setpoint selection contactThis dry contact input is used to switch between setpoints. Itis active only when the control is in Remote mode.Cooling HeatingSetpoint 1 Setpoint 2 Setpoint 1 Setpoint 2Setpoint selection contact open closed open closed3.9.1 - General descriptionSome contacts can be accessed only when the unit operatesin Remote mode.The following table summarises the connections at the userterminal block.3.9.4 - Volt-free demand limit selection contactUp to two dry contacts can be used to limit unit capacity.Note that the second contact is available for units with theenergy management module.Capacity limitation with two contacts is as follows:100% Limit 1 Limit 2 Limit 3Demand limit 1 contact open closed open closedDemand limit 2 contact open open closed closedThe limits are defined in the SETPOINT menu.