TOSOT DC INVERTER U-MATCH AIR
71
Single-phase units (36k-48k)
Figure 3-2-9
(5) Electric wiring of indoor unit side
Remove the electric box cover from the electric box sub-assy and then connect the wire.
Figure 3-2-10
The F, C, O connect to the COMMOM, CLOSE and OPEN terminal of the fresh air valve
respectively.
① The power cord and the wire of the fresh air valve are high-voltage, while the communication cord and
connection wire of the wired controller are low-voltage. They should run separately against electromagnetic
interference.
② The high-voltage and low-voltage lines should pass through the rubber rings at different electric box covers.
③ Do not bundle the connection wire of the wired controller and the communication cord together, or arrange
them in parallel, otherwise improper operation would occur.
④ The high-voltage and low-voltage lines should be fixed separately and securely, with internal big clamps for
the former and small clamps for the latter.
⑤ Tighten the indoor/outdoor connection cord and power cord respectively on the terminal boards with screws.
Faulty connection may cause a fire.
⑥ If the indoor unit connection cord (to the outdoor unit) and power supply are wired incorrectly, the air
conditioner may be damaged.
⑦ Connect the indoor unit connection cord properly based on the corresponding marks as shown in Figure
3-2-9.
⑧ Ground both the indoor and outdoor units by attaching a ground wire.
⑨ Unit shall be grounded in compliance with the applicable local and national codes.
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