R410A All DC Inverter Mini VRF MCAC-VTSM-2014-10
68 Installation
When earth protection line (shortly called PE line) is made of material the same as phase line, the smallest
sectional area of PE line should be in accordance with the regulation below:
Sectional area of core to phase lines(mm)
Smallest sectional area of PE line(mm)
5.3 Distribution highlights of distribution wiring
1. When distributing wiring, select wirings with different colors for phase line, zero line and protection earth
according to relevant regulations.
2. The power wire and control wire of concealed engineering is prohibited to bind together with refrigerant
piping. It is necessary to pass through wire tube and be distributed separately, and the gap between control
line and power wire should be 500mm at least.
3. When distributing wiring by passing through pipe, the following should be paid attention to:
1) Metal wire tube could be used in indoor and outdoor, but it is not suitable to the place with acid – alkali
corrosion.
2) Plastic wire tube is generally used in indoor and place with corrosion, but it is not suitable to situation with
mechanical damage.
3) The wiring through pipe shall not be in the form with ends jointing. If there must be joint, connection box
should be installed at the corresponding place.
4) The wiring with different voltage should not pass through the same wire tube.
5) Total sectional area of wiring through wire tube shall not exceed 40% valid area of stuffing tube.
6) Fixing point of wire tube support shall follow the standard below:
Normal diameter of wire tube
Largest gap between fixed points of wire tube
5.4 Indoor unit power supply wiring
Indoor Power Supply
Circuit Breaker
Manual swtich
Wire Distribution Box
Indoor Unit
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