DUAL-CIRCUIT UNITS

Description

Connector/channel

Terminal

Board

Remarks

Remarks

Alarm relay output

J3 / CH24

30A - 31A

Master NRCP-

Indicates alarms/alerts for circuit A*

circuit A

 

 

BASE

 

Alarm relay output

J3 / CH24

30B - 31B

Slave NRCP-

Indicates alarms/alerts for circuit B*

circuit B

 

 

BASE

 

Boiler relay output

J3 / CH25

37 - 38

Master NRCP-

Boiler start/stop control output.

 

 

 

BASE

See section 5.13.

Volt-free contact 24 V a.c. 48 V d.c. max, 20 V a.c. or 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.

Contact 1:

J4 / CH8

32 - 33

Master NRCP-

The contacts are used for unit start/stop and

start/stop/heat/cool

 

 

BASE

heat/cool control. They are only taken into

 

 

 

 

account if the unit is under remote operation

Contact 2:

J4 / CH9

63 - 64

Master NRCP-

control (rEM).

start/stop/heat/cool

 

 

BASE

 

 

 

 

 

See the description of these contacts in

 

 

 

 

sections 3.6.2 and 3.6.3.

24 V a.c., 20 mA

Connector: 8 pin WAGO 734-168, pitch 3.5

Contact 3:

J4 / CH10

73 - 74

Master NRCP-

These dry contacts are used for demand

demand limit selection

 

 

BASE

limit selection. See description of these

 

 

 

 

contacts in section 3.6.5.

Contact 4:

J4 / CH10

75 - 76

Slave

The remote demand limit selection contact is

demand limit selection

 

 

NRCP-BASE

active whatever the operating type of the

 

 

 

 

unit.

Contact 5:

J4 / CH8

65 - 66

Slave

These dry contacts are used for setpoint

setpoint selection

 

 

NRCP-BASE

selection.

 

 

 

 

They are only taken into account if the unit is

 

 

 

 

in remote control operating type (rEM).

Control contact 6:

J4 / CH9

67 - 68

Slave

See the description of these contacts in

setpoint selection

 

 

NRCP-BASE

sections 3.6.6.

User safety loop input

J4 / CH11a

34 - 35

Master

This contact is mounted in series with the

 

 

 

NRCP-BASE

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.

Connection to CCN

J12

1 - 2 - 3

Master

An RS-485 bus is used for connection to the

 

 

 

NRCP-BASE

CCN.

 

 

 

 

- Pin 1: signal +

- Pin 2: ground

- Pin 3: signal -

Connector: 3 pin WAGO 231-303, pitch 5.08

*The operation of these relays can vary depending on the user configuration. See section ‘Description of the User 2 configuration sub-menu’.

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Carrier 30RY/RYH, 30RA/RH manual DUAL-CIRCUIT Units, Nrcp-Base Ccn

30RY/RYH, 30RA/RH specifications

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