Electrical connections and wiring
PTC
FU
FU
C1
EC
TH
N
L1
L2
L3
C1
MS
IOL
Comp.
FU
Fuses
MS
Main switch
C1
Compressor contactor
TH
Thermostat
EC
External controls
COMP Compressor
PTC
Crankcase heater
IOL
Internal overload line break
Three phase electrical
characteristics
Compressor
model
LRA
(Locked Rotor Amp) A
MCC
(Maximum Continuous Current) A
Winding resistance
(between /- 7% at 25°C) Ohm
3
4
9
3
4
9
3
4
9
NTZ048
32
16
22
10.1
4.8
5
2.80
11.55
7.3
NTZ068
48.5
25
29
14.8
8.4
8.5
1.58
6.67
9.70
NTZ096
72
32
20.4
10.1
1.20
5.03
NTZ108
72
45
57
21.4
12.1
11
1.20
4.00
2.54
NTZ136
97.2
51
64
29
14.3
15
0.98
3.80
2.54
NTZ215
147.7
74
110
42.3
22.3
23
0.57
2.23
1.26
NTZ271
198
96
150
56.5
27.0
30
0.41
1.61
0.84
Three phase motor pro-
tection and suggested
wiring diagram
M
DGT
HP
180 s
TH
LP
CONTROL CIRCUIT
F1
F1
KM
KM
KM
KA
KA
A1
A2
A3
KA
KA
KS
KS
KS
L1
L3
L2
Q1
T1
T3
T2
LLSV
KS
Wiring diagram with
pump-down cycle
Control device
TH
Optional short cycle timer (3 min) 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
Compressor motor
M
Discharge gas thermostat
DGT
AB245486497018en-000601
14
Application Guidelines
