6
Terminal block connections
Connector/
channel
Terminal Board (item in wiring diagram)
Remarks
Control evaporator pump 1 J2A/Ch16 90-12 NRCP2-BASE main board (A1) The controller can regulate one or two evaporator pumps and
takes care of the automatic changeover between pumps.
Control evaporator pump 2 J2A/Ch17 90A-12 NRCP2-BASE main board (A1) The controller can regulate one or two evaporator pumps and
takes care of the automatic changeover between pumps.
Control condenser pump 1 J2A/Ch18 95-12 NRCP2-BASE main board (A1) The controller can regulate one or two condenser pumps and
takes care of the automatic changeover between pumps.
Control condenser pump 2 J2A/Ch19 95A-12 NRCP2-BASE main board (A1) The controller can regulate one or two condenser pumps and
takes care of the automatic changeover between pumps.
Alarm relay output J3/Ch24 30A-31A NRCP2-BASE main board (A1) Indicates the alarms.
Running relay output J3/Ch25 37-38 NRCP2-BASE main board (A1) This output is ON when at least one compressor is running.
Contact 1: on/o J4/Ch08 32-33 NRCP2-BASE main board (A1) This contact is used for the unit on/o control. It is only taken
into consideration if the unit is in the remote operating mode
(remote mode).
Contact 2: selection of second setpoint J4/Ch09 65-66 NRCP2-BASE main board (A1) This contact is only taken into consideration if the unit is in the
remote operating mode (remote mode).
Contact 3: capacity limit selection 1 J4/Ch10 73-74 NRCP2-BASE main board (A1) See description in chapter 3.7.4.
Contact 4: heating/cooling mode selection
(water-cooled heat pump unit only)
J5/Ch12 (shown
on terminal)
34-35 NRCP2-BASE main board (A1) This contact is only taken into consideration if the unit is in the
remote operating mode (remote mode).
User safety loop input J4/Ch11a 34-35 NRCP2-BASE main board (A1) This contact is used for the customer safety loops that require
unit shut-down if it is closed. Alarm P-91 is triggered.
Three-way valve control output (0-10 V) J8/Ch7 (shown on
terminal)
80-80+ NRCP2-BASE main board (A1 -
option 152)
The control allows control of a three-way valve based on the
saturated condensing temperature.
Contact, occupancy mode override J4/Ch08 77-78 NRCP2-BASE EMM (A3)/energy
management (option 156)
In the remote operating mode this allows control of the unit
occupancy (occupied/unoccupied).
Contact 3bis: capacity limit selection 2 J4/Ch09 73A-74A NRCP2-BASE EMM (A3)/energy
management
This contact is only available with the energy management
option (see chapter 3.7.4).
User safety loop input J4/Ch10 34A-35A NRCP2-BASE EMM (A3)/energy
management (option 156)
This contact is used for the customer safety loops that require
unit shut-down if it is closed. This contact is only available with
the energy management option.
Ice storage contact J4/Ch11a 75-76 NRCP2-BASE EMM (A3)/energy
management (option 156)
This contact is used to select the chilled-water setpoint.
Relay output for unit shut-down after an
alarm
J3/Ch24 30-31 NRCP2-BASE EMM (A3)/energy
management (option 156)
Indicates if the unit has completely shut down due to an alarm.
Relay output for an alert J3/Ch25 30B-31B NRCP2-BASE EMM (A3)/energy
management (option 156)
Indicates alerts.
Condenser ow switch input J5/Ch13 (shown
on terminal)
96-97 NRCP2-BASE EMM (A3)/energy
management (option 156)
Shows that there is water ow on the condenser side.
Space temperature input for setpoint
reset
J6/Ch02 (shown
on terminal)
71A-72A NRCP2-BASE EMM (A3)/energy
management (option 156)
Allows setpoint reset, if space temperature reset is selected.
Setpoint reset input J7A/Ch05 (shown
on terminal)
71-72 NRCP2-BASE EMM (A3)/energy
management (option 156)
Allows setpoint reset, if reset via the 4-20 mA input is selected.
Capacity limitation input J7B/Ch06 (shown
on terminal)
67-68 NRCP2-BASE EMM (A3)/energy
management (option 156)
Allows capacity limitation with a 4-20 mA signal.
Compressor A operation input J2A/Ch16 (shown
on terminal)
37A1-
38A1
NRCP2-BASE EMM (A3)/energy
management (option 156)
Compressor A operating status.
Compressor B operation input J2A/Ch17 (shown
on terminal)
37B1-
38B1
NRCP2-BASE EMM (A3)/energy
management (option 156)
Compressor B operating status.
Unit capacity output (0-10 V) J8/Ch7 (shown on
terminal)
79+-79- NRCP2-BASE EMM (A3)/energy
management (option 156)
This output reports the capacity percentage of the unit.
Refrigerant leak detection input 1 J7/Ch13 (shown
on terminal)
45-1-46-1 PD-AUX (A4)/leak detection
(option 159)
This input is used with the refrigerant leak detection option.
Refrigerant leak detection input 2 J8/Ch14 (shown
on terminal)
45-2-46-2 PD-AUX (A4)/leak detection
(option 159)
This input is used with the refrigerant leak detection option.
CCN connection ST3-HMI An RS-485 bus is used for connection to the CCN.
- Pin 1: signal +
- Pin 2: ground
- Pin 3: signal -
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