MrCool Advantage Series - Page 21

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Step 4: 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.
1. Prepare the cable for connection. Use the correct
cable using the table below.
Voltage
Model
Capacity
(BTU/hr)
AWG AWG
MCA MOP Min. Pref.
115V
9K 15 20 14 12
12K 15 20 14 12
208/
230V
9K 10 15 14 14
12K 15 15 14 12
18K 15 20 14 12
24K 20 25 12 10
36K 25 35 10 8
North America Minimum Wire Gauge for Power
Cables
2. Remove the electrical wiring cover from the unit by
loosening the 3 retaining screws. Refer to Fig. 5.6.
3. Remove the caps on the conduit panel.
4. Temporarily mount the conduit tubes (not included)
on the conduit panel.
5. Properly connect both the power supply and low
voltage lines to the corresponding terminals on the
terminal block.
6. Ground the unit in accordance with local codes.
7. Be sure to size each wire so that it allows for it to
be several inches longer than the required length
for wiring.
8. Use lock nuts to secure the conduit tubes.
9. Replace the wire cover and reinstall the 3 screws.
WARNING
ALL WIRING MUST PERFORMED STRICTLY IN
ACCORDANCE WITH THE WIRING DIAGRAM
LOCATED INSIDE THE OUTDOOR UNIT’S WIRE
COVER.
OUTDOOR UNIT INSTALLATION
5
5.4 Signal & Power Cable Connection