Owner and Installation Manual

7
Electrical Connections
Page 31 mrcool.com
DO NOT MIX UP LIVE AND NULL
WIRES
This is dangerous and can cause the air
conditioning unit to malfunction. Make
sure you clearly distinguish the Live (”L”)
Wires from the other wires.
All wiring must be performed in
accordance with the wiring diagrams
shown in Fig. 7.1 and demonstrated in
the images shown here.
BEFORE PERFORMING ANY ELECTRICAL WORK, TURN OFF ALL POWER TO THE SYSTEM.
Note that wire colors of this series / model may differ from previous models, other series and
general conventions.
All wiring must be performed in accordance with the wiring diagrams
shown in Fig. 7.1 and demonstrated in the images
below.
GREEN
TO INDOOR UNIT
(Communications Wire)
115V
POWE R S UPPLY
Y/G
RED
3
2 L N1
3
21
WHITE
BLACK
L N
OUTDOOR UNIT TE RMINAL
GREEN
TO INDOOR UNIT
208/ 230V
POWE R S UPPLY
Y/G
RED
3
2 L1L21
3
21
WHITE
BLACK
L1L2
OUTDOOR UNIT TE RMINAL
(Communications Wire)
Fig. 7.1
WIRE CONNECTING DIAGRAM (12K Unit Only)
WIRE CONNECTING DIAGRAM (All Other Units)
Connect signal and power cables
The outside unit’s terminal block is protected by an electrical wiring cover on the side of the unit.
A comprehensive wiring diagram is printed on the inside of the wiring cover.
WIRES AND TERMINALS ARE NUMBERED
MATCH AS SHOWN