1
LRA - Locked Rotor
Current (A)
MCC - Maximum
Continuous Current (A)
Winding resistance (Ω)
( ± 7 % at 68° F)
Motor Code
3
4
6
7
9
3
4
6
7
9
3
4
6
7
9
MT/MTZ018
38
20
30
-
-
9
5
7
-
-
2.49 10.24 3.38
-
-
MT/MTZ022
38
16
-
-
22.5
11
6
8.5
-
6
2.49 10.24 3.38
-
6.58
MT/MTZ028
57
23
-
-
32
16
7.5
11.5
-
8.5
1.37
7.11
2.30
-
4.80
MT/MTZ032
60
25
44
22
35
18
8
13
5.5
9
1.27
6.15
1.27
8.90
4.20
MT/MTZ036
74
30
74
26
35
17
9
17
7
9.5
1.16
5.57
1.16
8.60
4.10
MT/MTZ040
98
38
74
-
-
22
10
18
-
-
0.95
4.56
0.95
-
-
MT/MTZ044
115
42
77
44
78
22
9.5
16
8.5
13
0.74
3.80
1.13
5.83
1.68
MT/MTZ045
115
48.5
-
-
-
17
9.5
-
-
-
0.69
3.22
-
-
-
MT/MTZ050
115
42
77
44
78
25
12
19
10
13.5
0.72
3.80
1.39
5.83
1.68
MT/MTZ051
120
48.5
-
-
-
22
11.5
-
-
-
0.69
3.60
-
-
-
MT/MTZ056
130
60
105
50
72
26
12
23
11
15
0.57
2.41
0.76
3.86
-
MT/MTZ057
130
64
-
-
-
24
12
-
-
-
0.55
2.39
-
-
-
MT/MTZ064
137
67
124
-
72
29
15
25
-
17.5
0.57
2.41
0.76
-
1.64
MT/MTZ065
135
64
-
-
-
28
14
-
-
-
0.55
2.39
-
-
-
MT/MTZ072
135
80
143
-
100
30
15.5
27
-
18.5
0.55
1.90
0.56
-
1.32
MT/MTZ073
155
80
-
-
-
32
17
-
-
-
0.48
1.90
-
-
-
MT/MTZ080
140
80
132
-
102
36
18
29
-
22.5
0.48
1.90
0.56
-
1.30
MT/MTZ081
140
80
-
-
-
36
19
-
-
-
0.48
1.90
-
-
-
MT/MTZ100
157
90
126
62
110
43
22
35
17
26
0.50
1.85
0.67
3.10
1.26
MT/MTZ 125
210
105
170
75
150
54
27
43
22
30
0.38
1.57
0.43
2.51
0.84
MT/MTZ 144
259
115
208
90
165
64
30
51
25
40
0.27
1.19
0.37
2.00
0.72
MT/MTZ 160
259
140
208
99
165
70
36
51
29
46
0.27
1.10
0.37
1.76
1.10
ELECTRICAL CONNECTIONS AND WIRING
Three phase electrical characteristics
Motor protection
and suggested wiring
diagrams
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
Motor safety thermostat
..........................................................
thM
Discharge gas thermostat
.....................................................
DGT
MT and MTZ 3-phase compressors are
protected by an internal motor pro-
tector connected to the neutral point
of star connected stator windings. The
protector cuts out all 3 phases simulta-
neously.
Note:
once the overload protector has
tripped it may take up to 3 hours to re-
set and restart the compressor.
For all 3-phase compressors, a PTC
crankcase heater is required.