The Controls; Connections At The User's Terminal Block - Carrier PRO-DIALOG PLUS 30RW Manual

3.5 - The controls

Evaporator pump
The controller can regulate one or two evaporator pumps and
takes care of the automatic change-over between pumps.
Condenser pump
The controller can regulate one or two condenser pumps (fixed
or variable speed) and takes care of the automatic change-over
between pumps.
Evaporator heater
It protects the evaporator (and the pipe heater for units without
pump) against freezing if the unit is off.
Boiler
This relay output authorises start/stop of a boiler.
SINGLE-CIRCUIT UNITS
Description
Alarm relay output
Boiler relay output
Contact 1:
start/stop
Contact 2:
heat/cool or heat reclaim
selection
Contact 3:
demand limit selection or
setpoint selection
User safety loop input
Connection to CCN
6
Connector/channel Terminal
J3 / CH24 30 - 31
J3 / CH25 37 - 38
J4 / CH8 32 - 33
J4 / CH9 63 - 64
J4 / CH10 73 - 74
J4 / CH11a 34 - 35
J12 1 - 2 - 3

3.6 - Connections at the user's terminal block

3.6.1 - General description
The contacts below are available at the user's terminal block on
the NRCP-BASE board (see figure 1). Some of them can only
be used if the unit operates in remote operating type (rEM).
The following table summarises the connections at the user's
terminal block.
Board Remarks
NRCP-BASE Indicates alarms
NRCP-BASE Boiler start/stop control output.
See section 5.13.
NRCP-BASE The contacts are used for unit start/stop
and heat/cool control. They are only taken
into account if the unit is under remote
operation control (rEM).
NRCP-BASE
NRCP-BASE Depending on the configuration, this dry
contact can be used for remote setpoint
selection or demand limit selection (see
sections 4.3.11.3 and 3.6.2).
- The remote setpoint selection contact is
only taken into account if the unit is in
remote control operating type.
- The remote demand limit selection contact
is active whatever the operating type of the
unit.
NRCP-BASE This contact is mounted in series with the
water flow control contact. It can be used
for any customer safety loop that requires
that the unit is stopped, if it is open.
If it is unused this contact must be bridged.
NRCP-BASE A RS-485 bus is used for connection to the
CCN.
- Pin 1: signal +
- Pin 2: ground
- Pin 3: signal -
Remarks
Volt-free contact 24 V a.c.
48 V d.c. max, 20 V a.c. or
min. 20 V d.c., 3 A max, 80
mA min, external power
supply.
Connector: 4 pin
WAGO 734-104 pitch 3.5;
One per board needed.
24 V a.c., 20 mA
Connector: 8 pin
WAGO 734-168, pitch 3.5
Connector: 3 pin
WAGO 231-303, pitch 5.08