Page 29 mrcool.com
Unit Installation
WARNING
1. High and low voltage wires should be led through different rubber rings of the electric box cover.
2. Do not bundle up the temperature controller wire or lay them side by side, otherwise errors will
occur.
3. High and low voltage wires should be secured separately. Secure the former ones with large
clamps and the latter ones with small clamps.
.
4. Use screws to tighten the power cord and communication wire of the units on the terminal board.
Improper connection may create a fire hazard.
5. If the power cord and communication wire are not correctly connected, the air conditioner may
suffer damage.
6. Ground the units through connecting the ground wire.
7. The units should comply with applicable local and national rules and regulations on power
consumption.
8. When connecting the power cord, make sure the phase sequence of the power supply matches
with the corresponding terminals, otherwise the compressor will get reversed and operate
abnormally.
Electrical Connection
Connecting the Power Cord & Communication Wire
POWER
Breaker
208-230V L1
1PH L2
60Hz G
L1
L2
Outdoor
Unit
Y
B
W1
R
C
Communication
Connection
Y
0/B
W1
R
C
Electrical wiring of Single-phase unit: MDUO18024036
Fig. 2.29-A
2
1
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