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 thermostat wires or lay them side by side, otherwise errors will
occur.
3. High and low voltage wires should be secured separately.
4. Use screws to tighten the power cord and thermostat wires of the units on the terminal board.
Improper connection may create a fire hazard.
5. If the power cord and thermostat wires 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
Electrical wiring of Single-phase unit: MDUO18048060
Fig. 2.29-A
2
1
Terminals
Code
Remarks
Y
To a contact to control compressor
B
To a contact to control the 4way valve. It is suitable for
four way valve working in heating mode.
W1 To a contact to control the auxiliary heater 1
R
24 Volt Emergency (hot)
C
24 Volt (Common)
G
To a AC contact to control the indoor unit fan
Thermostat
To Next Page
Loading...
Need help?
General
