Carrier specifications a50-8352, Typical 50VS Unit Control Wiring

BLOWER SPEED WIRING

Unit	Orange	Brown	Black	Blue	Red
50VSA,B	Low	High	—	—	—
50VSC,D	—	Low	High	—	—
50VSE,F	—	—	Low	High	—
50VSG,H	—	—	—	Low	High
50VSI,J	Low	High	—	—	—
50VSK,L	—	—	Low	High	—
50VSM,N	—	—	—	Low	High

a50-8352

LEGEND

BR1 — Fan Relay Speed 1

BR2	— Fan Relay Speed 2
CC	— Compressor Contactor
CO	— Condensate Overflow
CR	— Compressor Relay
DAT	— Discharge Air Temperature
FP1 — Freeze Protection Water Side
FP2	— Freeze Protection Air Side
HP	— High Pressure Switch
LP	— Low Pressure Switch
LWT	— Leaving Water Temperature
RV	— Reversing Valve
		Factory Low Voltage Wiring
		Factory High Voltage Wiring

Field Low Voltage Wiring

Field Line Voltage Wiring

Optional Block

Internal PCB Connection

Quick Connect Terminal Screw Terminal

Relay Coil

Capacitor

High Pressure Switch

Low Pressure Switch

Temperature Thermistor

Condensate Switch

Relay Contacts

NOTES:

1.Used for optional communicating thermostat.

2.Cut JP1 or JP2 for dry contact output accessory relay 1 and 2.

3.If a single stage thermostat is used, place a jumper wire between Y1 and Y2 at P1 terminal.

4.If the disconnect option is not installed, connect the power to the L1 and L2 lugs on the compressor contactor.

5.Accessory relays 24-vac maximum, activated by compressor output.

6.For 230-v operation, remove the red wire and replace with the orange wire.

7.Before connecting BacNet™ or LonWorks® card, connect com- municating thermostat, then short J1 (2-3). If adding terminating resistance, short J1 (1-2).

Fig. 10 — Typical 50VS Unit Control Wiring

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