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23
LEGEND AND NOTES FOR FIG. 11 AND 12
LEGEND
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 transformers or circuits; circuit separation
shall be maintained.
3. On 200/240-v units, the transformers are factory-wired for
240 v. for 200-v applications, move the blue wire to the 200-v
tap of each transformer.
4. Shielded wire shall have drain wire connected to VFD ground
screw. The floating end of the drain wire shall be insulated.
5. 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.
BPS_S
—
Fan Start/Stop Relay (VFD Bypass Mode)
C
—
Compressor Contactor
CB
—
Circuit Breaker
CDWF
—
Condenser Waterflow Relay
CDWFS
—
Condenser Waterflow Switch
CH
—
Crankcase Heater
CLO
—
Compressor Lockout Control
COMP
—
Compressor
CR
—
Compressor Relay
DHS
—
Duct High Static Limit Switch
DISC1
—
Disconnect Switch
DSP
—
Duct Static Pressure Transducer
ECONO
—
Economizer Valve/Damper Control
EWT
—
Entering Water Temperature Sensor
FLTS
—
Filter Status Switch
FREEZ
—
Freeze Thermostat (Water Economizer)
FRZ
—
Freeze Thermostat (DX Circuit)
FU
—
Fuse
GND
—
Ground
HIR
—
Heat Interlock Relay
HPS
—
Refrigerant High Pressure Switch
HRN
—
Harness
IAQ
—
Indoor Air Quality
IFM
—
Indoor Fan Motor
LPS
—
Refrigerant Low Pressure Switch
MA_RA
—
Mixed/Return Air Temperature Sensor
MVLV
—
Modulating Valve (Econ)/ Head Pressure Control
OAT
—
Outside Air Temperature
OLR
—
Compressor Motor Protector
PCB1
—
Unit Control Board (I/O Flex 6126)
PCB2
—
I/O Expansion Board (I/O Flex 8160)
PHASE
—
Phase/Rotation Monitor
PRM
—
Phase/Rotation Monitor Relay
PRES
—
Refrigerant Pressure Sensor
RESET
—
External Reset
RH
—
Relative Humidity
SAT
—
Supply Air Temperature Sensor
SPT
—
Space/Zone Temperature Sensor
T
—
Transformer
TB1
—
Power Distribution Terminal Block
TB3-5
—
24 V Neutral Terminal Block
TB7
—
24 V Hot Terminal Block
TRMCT
—
VAV Terminals Control
TRMOP
—
VAV Terminals Open
VAV
—
Variable Air Volume
VENTR
—
Ventilation Output
VFD
—
Variable Frequency Drive
Optional Wiring (Optional items noted with *)
Field Wiring