Electrical data, connections and wiring
MLZ scroll compressors are available in 6 different motor voltages.
Motor voltage
The compressor terminal box IP rating according to IEC 529 is
IP22
for all models. IP ratings is only
valid when correctly sized cable glands of the IP rating is applied.
• First numeral, level of protection against contact and foreign objects
2
protection against object size over 12.5mm (1/2 inch) (fingers of similar)
• Second numeral, level of protection against water
2
protection against dripping water when tilted up to 15°
The IP rating can be upgraded to IP54 with accessory kit (see section Spare parts & Accessories).
IP rating
MLZ scroll compressors will only compress gas
while rotating counter-clockwise (when viewed
from the compressor top). Since single-phase
motors will start and run in only one direction,
reverse rotation is not a major consideration.
Three-phase motors, however, will start and
run in either direction, depending on the phase
angles of the supplied power. Care must be taken
during installation to ensure that the compressor
operates in the correct direction (see “Phase
sequence and reverse rotation protection”).
The drawings below show electrical terminal
labelling and should be used as a reference
when wiring the compressor. For three phase
applications, the terminals are labelled T1, T2, and
T3. For single-phase applications the terminals
are labelled C (common), S (start), and R (run).
The terminal cover and gasket should be installed
prior to operation of the compressor. Respect the
“up” marking on gasket and cover and ensure
that the two outside tabs of the cover engage the
terminal box.
Wiring connections
Terminal cover mounting
Terminal cover removal
C & Q terminal box type
C
T1
S
T2
R
T3
P & T terminal box type
push
push
push
Motor voltage
code 1
Motor voltage
code 2
Motor voltage
code 4
Motor voltage
code 5
Motor voltage
code 7
Motor voltage
code 9
Nominal voltage
50Hz
-
200-220V - 3ph
380-415V - 3ph
220-240V - 1ph
-
-
Voltage range
50Hz
-
180 - 242V
342 - 457V
198 - 264V
-
-
Nominal voltage
60Hz
208-230V - 1ph
208-230V - 3ph
460V - 3ph
-
575V - 3ph
380V - 3ph
Voltage range
60Hz
187 - 253V
187 - 253V
414 - 506V
-
517 - 632V
342 - 418V
AB243286444663en-001003
15
Application Guidelines
Summary of Contents for MLZ Evolution A
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