Page 18mrcool.com
Unit Installation
Outdoor Unit Model Power Supply
Max. Overcurrent
Protection (A)
208/230V
60Hz
15 amps4 amps
MDUI18048/MDUI18060
Min. Circuit
Ampacity
Electrical Connection
Electrical Parameters
1. The fuse is located on the main board.
2. Install a circuit breaker at every power terminal near the units (indoor unit and thermostat) with at least
0.12in (3mm) contact gap. Both units must reach the plug.
3. Circuit breaker and power cord specifications listed in the above table are determined based on the
maximum power input of the units.
4. Specifications of power cords listed in the above table are applicable in a working condition where
ambient temperature is 104°F (40°C) and multi-core copper cable (e.g. YJV copper cable, with insulated
PE and PVC sheath) is protected by a conduit, and is resistant to 194°F (90°C) in maximum (see IEC
60364-5-52). If working conditions change, please adjust the specifications according to national
standards.
5. Specifications of circuit breaker are based on working conditions where the working temperature is
104°F (40°C). If working conditions change, please adjust the specifications according to national
standards.
6. Use 5pc of AWG18 power cords as the signal wire between the indoor unit and the thermostat. The
maximum length is 98 feet (30m). Please select a proper length according to local conditions.
Communication cords must not be twisted together.
7. The gauge of signal wire should not be less than AWG18. It’s recommended to use AWG18 power cords
as the signal wire.
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