Owners Manual
POWER
Breaker
208-230V L1
1PH L2
60Hz
G
L1
L2
Outdoor
Unit
Y
R
C
Electrical wiring of Single-phase unit: MDUCO18048060
Fig. 2.30-B
Thermostat
Page 30
mrcool.com
Unit Installation
WARNING
DO NOT bundle up the temperature thermostat wires and power wires, or lay them side by
side, otherwise errors will occur.
1. High and low voltage wires should be led through different rubber rings of the electric box cover.
2. High and low voltage wires should be secured separately.
3. Use screws to tighten the power cord and thermostat wire of the units on the terminal board. An
improper connection could create a fire hazard.
4. If the power cord and thermostat wires are not correctly connected, the air conditioner may suffer
damage.
5. Ground the units through connecting the ground wire and ensure it is secure.
6. The units should comply with applicable local and national rules and regulations on power
consumption.
7. 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.
POWER
Breaker
208-230V L1
1PH L2
60Hz G
L1
L2
Outdoor
Unit
R
C
Thermostat
Y
Electrical wiring of Single-phase unit: MDUCO18024036
Electrical Connection
Connecting the Power Cord & Thermostat Wire
Fig. 2.30-A