U-Match Series DC Inverter Service Manual
74
3.2 Specification of Connection Pipe
3.2.1 Duct Type
Table 3-2-4
Size of Fitting
Pipe (inch)
Max. Height Difference
between Indoor Unit
and Outdoor Unit (m)
Drainage pipe(Outer
Diameter × wall
thickness) (mm)
3.2.2 Cassette Type
Table 3-2-4
Size of Fitting
Pipe (inch)
Max. Height
Difference between
Indoor Unit and
Outdoor Unit (m)
Drainage pipe(Outer
Diameter × wall
thickness) (mm)
The connection pipe should be insulated with proper water-proof insulating material.
The pipe wall thickness shall be 0.5-1.0 mm and the pipe wall shall be able to withstand the
pressure of 6.0 MPa. The longer the connecting pipe, the lower the cooling and heating effect performs.
4 ELECTRIC WIRING WORK
4.1 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 1-4-1 and Table 1-4-2
③. Before turning on, verify that the voltage is within the 198~264V range (for single phrase unit) .
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 3 mm 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.
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