1
LRA - Locked Rotor
Current (A)
MCC - Maximum
Continuous Current
(A)
Winding resistance (Ω)
( ± 7 % at 68° F)
Motor Code
1
5
1
5
1
5
Winding
run
start
run
start
MT/MTZ018
51
40
13
10
1.36
4.82
1.80
4.70
MT/MTZ022
49.3
41
17
15
1.25
2.49
1.78
4.74
MT/MTZ028
81
51
25
20
0.74
1.85
1.16
3.24
MT/MTZ032
84
70
26.5
20
0.64
2.85
0.90
4.30
MT/MTZ036
84
60
30
22
0.64
2.85
0.89
4.35
MT/MTZ040
99
-
34
-
0.53
2.00
-
-
MT/MTZ044
97
-
31
-
0.45
1.90
-
-
MT/MTZ050
114
92
36
29
0.37
1.79
0.52
2.65
MT/MTZ056
136
-
42.5
-
0.32
1.61
-
-
MT/MTZ064
143
-
46
-
0.32
2.10
-
-
50 Hz
PSC/CSR*
CSR only
Models
Run
capacitors
(1)
Start
capacitors
(2)
Start
relay
(A) µF
(C) µF
(B) µF
MT/MTZ018 JA-5
20
10
100
3ARR3J4A4
MT/MTZ022 JC-5
20
10
100
MT/MTZ028 JE-5
20
10
100
MT/MTZ032 JF-5
25
10
135
MT/MTZ036 JG-5
25
10
135
MT/MTZ050 HK-5
30
15
135
60 Hz
PSC/CSR*
CSR only
Models
Run
capacitors
(1)
Start
capacitors
(2)
Start
relay
(A) µF
(C) µF
(B) µF
MT/MTZ018 JA-1
15
10
100
3ARR3J4A4
MT/MTZ022 JC-1
30
15
100
MT/MTZ028 JE-1
25
25
135
MT/MTZ032 JF-1
25
20
100
MT/MTZ036 JG-1
25
20
100
MT/MTZ040 JH-1
35
20
100
MT/MTZ044 HJ-1
30
15
135
MT/MTZ050 HK-1
30
15
135
MT/MTZ056 HL-1
35
20
200
MT/MTZ064 HM-1
30
25
235
Single phase electrical
characteristics
ELECTRICAL CONNECTIONS AND WIRING
Nominal capacitor values
and relays
*
PSC: Permanent Split Capacitor
CSR: Capacitor Start Run
(1) Run capacitors: 440 volts
(2) Start capacitors: 330 Volts
Trickle circuit
PSC wiring
CSR wiring
The trickle circuit provides for heating
the compressor crankcase by feeding
a small current to the auxiliary winding
and the run capacitor.
See the drawings
page 14.
By using PSC or CSR starting systems,
compressor models MT/MTZ018-022
can be operated without crankcase
heaters as the heater function is provi-
ded by the trickle circuit. For the larger
single phase compressor models MT/
MTZ028-064, the use of the PTC crank-
case heater is recommended.
PSC wiring may be used for refrigerant
circuits with capillary tubes or expan-
sion valves with bleed ports. Pressure
equalization must be ensured before
start-up because of the low starting tor-
que characteristics of this system.
CSR wiring provides additional motor
torque at start-up by the use of a start
capacitor in combination with the run
capacitor. This system can be used
for refrigerant circuits with capillary
tubes or expansion valves. The start
capacitor is only connected during
starting; a potential relay is used to dis-
connect the capacitor after the start se-
quence.
Single phase compressor motors are in-
ternally protected by a temperature and
current sensing bimetallic protector,
which senses the main and start win-
ding currents and the winding tempe-
rature. Once the protector has tripped,
it may take from two to four hours for
the compressor to reset and restart.
Check that the power supply corres-
ponds to compressor characteristics
(refer to compressor nameplate).