Carrier 50XJ064-104 Rocc, Aqua, Spt, Bpss, Frz, Gnd, Hir, TB2, Cbr, Hps, Trans, Hwv, Lps, Ventr

LEGEND AND NOTES FOR ALL 50BV WIRING DIAGRAMS

			LEGEND
ALARM — Unit Alarm Relay (Critical Fault)		ECONO — Economizer Valve/Damper Control		RESET	— External Reset
ALM-CM — Alarm/Warning Relay Common		EWT	— Entering Water Temp. Sensor	ROCC	— Remote Occupancy
AO	— Analog Output	FLTS	— Filter Status Switch
				SAT	—	Supply Air Temp. Sensor
AQUA	— Aquastat	FREEZ	— Freeze Thermostat
				SPT	—	Space/Zone Temperature Sensor
BM	— Blower Motor		(Water Economizer)
				SF	— Supply Fan Start/Stop Relay
BPS_S	— Fan Start/Stop Relay	FRZ	— Freeze Thermostat (DX Circuit)
				SPEED — 0-10 VDC Signal Isolator for VFD
	(VFD Bypass Mode)	FSD	— Fire Alarm/Shutdown
				SW	— Switch
BR	— Blower Relay	GND	— Ground
				T	— Transformer
BYPAS	— VFD Bypass Control	HIR	— Heat Interlock Relay
				TB2	—	Terminal Block for Field Connections
CBR	— Circuit Breaker	HPS	— High Refrigerant Pressure Switch
				TRANS	— Transformer
CC	— Compressor Contactor	HWV	— Hot Water Valve
				TRMCT — VAV Terminals Control
CDWF	— Condenser Waterflow Relay	LPS	— Low Refrigerant Pressure Switch
				TRMOP — VAV Terminals Open
CDWFS — Condenser Waterflow Switch		MA_RA — Mixed/Return Air Temp. Sensor
				VENTR	—	Ventilation Output
CLO	— Compressor Lockout Control	MBVR	— Motorized Ball Valve Relay
				VFD	— Variable Frequency Drive
CMP	— Compressor Control Relay	MSR	— Local/Remote Control Relays
				WARN — Unit Warning Relay
COMPR — Compressor		OLR	— Compressor Motor Protector
						(Non-Critical Fault)
CSMUX — Signal Multiplexer-Comp Status		PCB1	— Unit Control Board
						Unit Wire
DEHUM — External Dehumidification		PCB2,3 — I/O Expansion Board
DHS	— Duct High Static Limit Switch	PHASE — Phase/Rotation Monitor				Field Wiring
DO	— Digital Output	PHASER— Phase Monitor Relay
DSP	— Duct Static Pressure Transducer RAT		— Return Air Thermostat

NOTES:

1.Partial wiring shown on both power and control diagrams.

2.Class 2 transformer TRANS-1 is wired into separate circuit. Do not interconnect other transformers or circuits; circuit separation or compressor transformers from low voltage control panel transformers shall be maintained.

3.Shielded wire shall have drain wire connected to VFD ground screw. The floating end of the drain wire shall be insulated.

4.Shielded wire shall have drain wire connected to the control panel, adjacent to the PCB. The floating end of the drain wire shall be insulated.

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