Terminal Block Connections - Carrier AquaForce 61XWHZE Control Manual

3 - HARDWARE DESCRIPTION

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
On/Off switch
Second setpoint switch
Demand limit switch #1
Heat/Cool switch
Reset setpoint 4-20 mA signal
Alarm Relay
Running Relay
Occupancy override switch
Capacity limit switch input #2
Customer interlock
Ice done contact
Capacity limit control
Chiller ready
Chiller in alert
Chiller totally 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:
On/Off contact
Cooling/heating contact
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
Setpoint 1 Setpoint 2 Setpoint 1 Setpoint 2
Setpoint selection
open
contact
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%
Demand limit 1 contact open
Demand limit 2 contact open
The limits are defined in the Setpoint menu.
8
Board Connector
SIOB/CIOB, circuit A DI-01
SIOB/CIOB, circuit A DI-02
SIOB/CIOB, circuit A DI-03
SIOB/CIOB, circuit A DI-04
SIOB/CIOB, circuit A AI-10
SIOB/CIOB, circuit A DO-05
SIOB/CIOB, circuit A DO-06
SIOB/CIOB, EMM DI-01
SIOB/CIOB, EMM DI-02
SIOB/CIOB, EMM DI-03
SIOB/CIOB, EMM DI-04
SIOB/CIOB, EMM AI-10
SIOB/CIOB, EMM DO-04
SIOB/CIOB, EMM DO-05
SIOB/CIOB, EMM DO-06
Off Cooling Heating
open closed closed
open open closed
Heating
closed open closed
Limit 1 Limit 2 Limit 3
closed open
open closed
Remarks
Used for the unit on/off control if the unit is in Remote mode.
The contact is taken into consideration if the unit is in Remote mode.
Used to control demand limit (see section 6.7).
Used to select heat/cool mode.
Allows the customer to reset the currently selected setpoint.
Indicates alarms.
Used to signal a running status (at least one compressor started).
Enables to switch between occupied (closed contact) and unoccupied
mode (open contact).
Used to control capacity limit.
Used for the customer safety loops.
Used for ice storage control.
Used for capacity limitation.
Output closed when the chiller is ready.
Indicates the shutdown of one of the circuits.
Indicates the unit shutdown.
closed
closed