Carrier 19XR Start-Up, Operation And Maintenance Instructions Manual page 97

NOTES:
LED status with power applied and prior to run command.
1
Transformer T1 primary fuses FU1/FU2 value dependent on system voltage and model, per Chart 1.
2
Transformer connections per transformer nameplate connection diagram.
MOVs are used on power stack assemblies for system voltages of 200 thru 460 vac (as shown). Resistor/
capacitor networks (DVDTs) are used on power stack assemblies in place of MOVs for a system voltage
3
of 575 vac (not shown).
K3 relay shown in deenergized state. K3 contact will close when power is applied. K3 contact will open
4
on stop command or system fault.
AUX
''ON''
BR
CB
COMM
''OFF''
COND
CPU
CVC
CT
EVAP
FU
Fig. 45 — Benshaw, Inc. Solid-State Unit Mounted Starter Wiring Schematic (Low Voltage)
— Auxiliary G — Ground
— Bridge Rectifier L — Main Supply Power
— Circuit Breaker LL — Control Power Supply
— Communication M — Contactor
— Condenser O/L — Overload Reset
— Central Processing Unit S — Contactor
— Chiler Visual Controller SCR — Silicone Controller Rectifier
— Current Transformer ST — Shunt Trip
— Evaporator TB — Terminal Block
— Fuse
LEGEND
Wire Node Symbol
may have terminal block
Benshaw supplied
terminal block
Terminal Strip
Power Connection
PC Board Terminals
Twisted Pair
Twisted Shielded Pair
Shield Wire
Field Wiring