Carrier AquaForce 61XWHZE, Руководство по управлению, Страница: 8 / 52

8
3.8 - Terminal block connections
Connections available at the user terminal block may vary
depending on the selected options. The following table summarizes
connections at the user terminal block.
IMPORTANT: Some contacts can be accessed only when the
unit operates in Remote mode.
Terminal block connections
Description
Board Connector Remarks
On/Off switch SIOB/CIOB, circuit A DI-01 Used for the unit on/off control if the unit is in Remote mode.
Second setpoint switch SIOB/CIOB, circuit A DI-02 The contact is taken into consideration if the unit is in Remote mode.
Demand limit switch #1 SIOB/CIOB, circuit A DI-03 Used to control demand limit (see section 6.7).
Heat/Cool switch SIOB/CIOB, circuit A DI-04 Used to select heat/cool mode.
Reset setpoint 4-20 mA signal SIOB/CIOB, circuit A AI-10 Allows the customer to reset the currently selected setpoint.
Alarm Relay
SIOB/CIOB, circuit A DO-05 Indicates alarms.
Running Relay SIOB/CIOB, circuit A DO-06 Used to signal a running status (at least one compressor started).
Occupancy override switch SIOB/CIOB, EMM DI-01
Enables to switch between occupied (closed contact) and unoccupied
mode (open contact).
Capacity limit switch input #2 SIOB/CIOB, EMM DI-02 Used to control capacity limit.
Customer interlock SIOB/CIOB, EMM DI-03 Used for the customer safety loops.
Ice done contact SIOB/CIOB, EMM DI-04 Used for ice storage control.
Capacity limit control SIOB/CIOB, EMM AI-10 Used for capacity limitation.
Chiller ready SIOB/CIOB, EMM DO-04 Output closed when the chiller is ready.
Chiller in alert SIOB/CIOB, EMM DO-05 Indicates the shutdown of one of the circuits.
Chiller totally shutdown SIOB/CIOB, EMM DO-06 Indicates the unit shutdown.
3.8.1 - Volt-free contact on/off/cooling/heating
For units in Remote mode, on/off and heating/cooling contacts
operate as follows:
Off Cooling Heating
On/Off contact open closed closed
Cooling/heating contact open open closed
Legend:
1. Off: Unit is stopped
2. Cooling: Unit is allowed to start in Cooling
3. Heating: Unit is allowed to start in Heating
3.8.2 - Volt-free setpoint contact
This dry contact input is used to switch between setpoints. It is
active only when the control is in Remote mode.
Cooling Heating
Setpoint 1 Setpoint 2 Setpoint 1 Setpoint 2
Setpoint selection
contact
open closed open closed
3.8.3 - Volt-free demand limit selection contact
Up to two dry contacts can be used to limit unit capacity. Note that
the second contact is available for units with the energy
management module.
Capacity limitation with two contacts is as follows:
100% Limit 1 Limit 2 Limit 3
Demand limit 1 contact open closed open closed
Demand limit 2 contact open open closed closed
The limits are defined in the Setpoint menu.
3 - HARDWARE DESCRIPTION