Carrier OMNIZONE 50XJ064-104 Operating And Troubleshooting Manual page 42

LEGEND AND NOTES FOR ALL 50XJ WIRING DIAGRAMS
ALARM — Unit Alarm Relay (Critical Fault)
ALM-CM — Alarm/Warning Relay Common
BPS_S — Fan Start/Stop Relay
(VFD Bypass Mode)
BYPAS — VFD Bypass Control
C — Compressor Contactor
CB — Circuit Breaker
CDWF — Condenser Waterflow Relay
CDWFS — Condenser Waterflow Switch
CH — Crankcase Heater
CLO — Compressor Lockout Control
CMP — Compressor Control Relay
COMP — Compressor
CSMUX — Signal Multiplexer-Comp Status
CUVL — UVC Light For Indoor Coil Area
DEHUM — External Dehumidification
DHS — Duct High Static Limit Switch
DISC1 — Disconnect Switch
DS — Door Switch
DSP — Duct Static Pressure Transducer
ECONO — Economizer Valve/Damper
Control
EWT — Entering Water Temp. Sensor
FLTS — Filter Status Switch
NOTES:
1. Partial wiring shown on both power and control diagrams.
2. All class 2 transformers are wired into separate circuits. Do not interconnect these
3. On 200/240 v units, the transformers are factory wired for 240 v. For 200 v applica-
4. Shielded wire shall have drain wire connected to VFD ground screw. The floating end
5. Shielded wire shall have drain wire connected to the control panel, adjacent to the
FREEZ — Freeze Thermostat
(Water Economizer)
FRZ — Freeze Thermostat (DX Circuit)
FSD — Fire Alarm/Shutdown
FU — Fuse
GND — Ground
HEAT — Electric Heat Stage Control
HIR — Heat Interlock Relay
HPS — High Refrigerant Pressure Switch
HRN — Harness
HWV — Hot Water Valve
IFM — Indoor Fan Motor
J — Jumper Wire
LPS — Low Refrigerant Pressure Switch
MA_RA— Mixed/Return Air Temp. Sensor
MVLV — Modulating Valve (Econ)/
Heat Pres. Ctl.
OLR — Compressor Motor Protector
PCB1 — Unit Control Board
PCB2,3— I/O Expansion Board
PHASE — Phase/Rotation Monitor
PUMP — Water Pump Request
RESET — External Reset
ROCC — Remote Occupancy
transformers or circuits; circuit separation shall be maintained.
tions, move the blue wire to the 200 v tap of each transformer.
of the drain wire shall be insulated.
PCB. The floating end of the drain wire shall be insulated.
LEGEND
SAT
SPT
SF
SPEED — 0-10 VDC Signal Isolator for VFD
SW
T
TB1
TB2
TB3
TB5-7
TOWE
R
TRMCT — VAV Terminals Control
TRMOP — VAV Terminals Open
VENTR — Ventilation Output
VFD
WARN
42
— Supply Air Temp. Sensor
— Space/Zone Temperature Sensor
— Supply Fan Start/Stop Relay
— Switch
— Transformer
— Power Distribution Terminal Block
— 120 V-Hot Terminal Block
— 120 V-Neutral Terminal Block
— Terminal Blocks for
Field Connections
Tower Request
—
— Variable Frequency Drive
— Unit Warning Relay
(Non-Critical Fault)
Optional Wiring
(Optional Items Noted With "*")
— — Field Wiring