A
PPLICATION
GUIDELINES
MLZ/MLM scroll compressors are available in 3 different motor voltages.
MLZ/MLM 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 direc-
tion, 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 oper-
ates in the correct direction (see “Phase sequence
and reverse rotation protection” page 18).
The drawings below show electrical terminal la-
belling and should be used as a reference when
wiring the compressor. For three phase applica-
tions, 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 ter-
minal box.
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 ter-
minal box.
The compressor terminal box IP rating according to CEI 529 is
IP22
for all models.
First numeral, level of protection against contact and foreign objects
•
2
protection against object size over 1/2 inch (fingers of similar)
Second numeral, level of protection against water
•
2
protection against dripping water when tilted up to 15°
Motor voltage
Wiring connections
Terminal cover mounting
Terminal cover removal
IP rating
E
LECTRICAL
DATA
,
CONNECTIONS
AND
WIRING
Motor voltage code 1
Motor voltage code 2
Motor voltage code 4
Motor voltage code 5
50 Hz
Nominal voltage
-
200-220 V / 3 ph / 50 Hz
380-400 V / 3 ph / 50 Hz
220-240 V / 1 ph / 50Hz
Voltage range
-
180 - 242 V
340 - 460 V
198 - 264 V
60 Hz
Nominal voltage
208-230 V / 1 ph / 60 Hz
208-230 V / 3 ph / 60 Hz
460 V / 3 ph / 60 Hz
-
Voltage range
187 - 253 V
187 - 253 V
414 - 506 V
-
14
FRCC.PC.016.A1.22
Ring connect screw terminals
C terminal box type
C
T₁
S
T₂
R
T₃
Quick connect spade terminals
P terminal box type
push
push
push
