Fig. 45 — Benshaw, Inc. Solid-State Unit Mounted Starter Wiring Schematic (Low Voltage)
NOTES:
1
LED status with power applied and prior to run command.
‘‘ON’’
‘‘OFF’’
2
Transformer T1 primary fuses FU1/FU2 value dependent on system voltage and model, per Chart 1.
Transformer connections per transformer nameplate connection diagram.
3
MOVs are used on power stack assemblies for system voltagesof 200 thru 460 vac (as shown). Resistor/
capacitor networks (DVDTs) are used on power stack assemblies in place of MOVs for a system voltage
of 575 vac (not shown).
4
K3 relay shown in deenergized state. K3 contact will close when power is applied. K3 contact will open
on stop command or system fault.
LEGEND
AUX — Auxiliary
BR — Bridge Rectifier
CB — Circuit Breaker
COMM — Communication
COND — Condenser
CPU — Central Processing Unit
CVC — Chiler Visual Controller
CT — Current Transformer
EVAP — Evaporator
FU — Fuse
G—Ground
L—Main Supply Power
LL — Control Power Supply
M—Contactor
O/L — Overload Reset
S—Contactor
SCR — Silicone Controller Rectifier
ST — Shunt Trip
TB — Terminal Block
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
97
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