Carrier 30RY/RYH Dual-Circuitunits, Description, Connector/channel, Terminal, Board, Remarks

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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