14
Wiring diagram
without pump-down cycle
Control device ............................................................................................. TH
Optional short cycle timer (3 min) 5 pts ........ 180 s
Control relay ................................................................................................... KA
Compressor contactor .................................................................... KM
Safety lock out relay ............................................................................. KS
H.P. switch .......................................................................................................... HP
Fused disconnect .................................................................................... Q1
Fuses ............................................................................................................................ F1
External overload protection .................................................. F2
Compressor motor ................................................................................... M
Discharge gas thermostat
..................................................... DGT
ELECTRICAL CONNECTIONS AND WIRING
Wiring diagram
with pump-down cycle
Control device ............................................................................................. TH
Optional short cycle timer (3 min) 5 pts ........ 180 s
Control relay ................................................................................................... KA
Liquid Solenoid valve ................................................................. LLSV
Compressor contactor .................................................................... KM
Safety lock out relay ............................................................................. KS
Pump-down control & L.P. switch .................................... BP
H.P. switch .......................................................................................................... HP
Fused disconnect .................................................................................... Q1
Fuses ............................................................................................................................ F1
External overload protection .................................................. F2
Compressor motor ................................................................................... M
Discharge gas thermostat ..................................................... DGT
IP rating The compressor terminal boxes IP rat-
ing according to CEI 529 are:
IP55 for NTZ048 - 136
IP54 for NTZ215 - 271.
The IP ratings are only valid when cor-
rectly sized cable glands of the same IP
rating are applied.
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