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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.