DC Inverter U-match Series Duct Type Unit
25
(5). More noise is likely to be produced in the bottom return air mode than the
backward return air mode, so it is suggested to install a silencer and a static
pressure box to minimize the noise.
(6). The installation method can be chosen with considering the conditions of the
building and maintenance etc, as shown in Fig. 4.36.
Fig. 4.36
Table 4.7 Installation of the return air duct
No.
Name
No.
Name
1
Return Air Inlet (with filter)
4
Indoor unit
2
Canvas Duct
5
Supply Air Duct
3
Return Air Duct
6
Grille
4.7 Electrical Wiring
4.7.1 Wiring Precautions
①
.
Before obtaining access to terminals, all supply circuits must be disconnected.
②
.
The rated voltage of the unit is as shown as Table 3.4 and Table 3.5.
③
.
Before turning on, verify that the voltage is within the 187~252V range (for single phrase units).
④
.
Always use a special branch circuit and install a special receptacle to supply power to the air
conditioner.
⑤
.
Use a special branch circuit breaker and receptacle matched to the capacity of the air conditioner.
⑥
.
The special branch circuit breaker is installed in the permanent wiring. Always use a circuit that can
trip all the poles of the wiring and has an isolation distance of at least 3mm (1/8inch) between the
contacts of each pole.
⑦
.
Perform wiring work in accordance with standards so that the air conditioner can be operated safely
and positively.
⑧
.
Install a leakage special branch circuit breaker in accordance with the related laws and regulations
and electric company standards.
