Use and Care Manual

18K Single-Zone Wiring Information & Diagrams
Page 44mrcool.com
TO INDOOR
UNIT
(DIYPRO™ Cable)
208/230V
POWER
SUPPLY
Y/G
RED
32 L1L21
3
21
WHITE
BLACK
L1 L2
OUTDOOR UNIT TERMINAL BLOCK
Fig. 8.2
WIRING DIAGRAM 18K SINGLE-ZONE CONDENSER
18K Single-Zone Wiring Information
If the system being installed is an 18K single-zone cassette and condenser, please read the information below
before proceeding to the next step in the installation. If you’re installing a ceiling cassette as part of a
multi-zone system, please proceed to the next page for the multi-zone wring information and diagrams.
NOTE: 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
TO CORRESPOND WITH ONE ANOTHER
AS SHOWN BELOW.
**BEFORE PERFORMING ANY ELECTRICAL WORK, TURN OFF ALL POWER TO THE SYSTEM.**
Note that the wire colors of this series/model may differ from previous models, other series and
general wiring conventions. All wiring must be performed in accordance with the wiring
diagrams shown in Fig. 8.2 and demonstrated in the images below.
DO NOT MIX UP LIVE AND NULL WIRES.
• This is dangerous and could cause the 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.
SELECT THE CORRECT POWER CABLE
•
See table below for gauge requirements
NOTE: The table below is a standard chart,
the AWG ratings and wiring needs will change
based on wire length and temperature.
Appliance
Amps (A)
AWG
30
18K
Capacity
of Outdoor
Unit
Minimum Wire Gauge for Power Cables
MCA MOP Min. Pref.
12 1018