U-Match Series Service Manual
46
(3) If the bottom return air is desired, just change the place of the rectangular flange and the return
air cover plate.
(4) Connect one end of the return air duct to the return air outlet of the unit by rivets and the other to
the return air louver. For the sake of the convenience to freely adjust the height, a cutting of
canvas duct will be helpful, which can be reinforced and folded by 8# iron wire
(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 Figure 3-1-23.
Figure 3-1-23
Table 3-1-4 Installation of the return air duct
1.2 Installation of Cassette Type
1.2.1 Before Installation
After receiving the machine, please check for any transport damage. If finding any surface or
internal damage, please immediately report to the transport company or equipment company in writing.
After receiving the machine, please check the unit and accessories in reference to the packing list.
Ensure that the model is correct and the machine is in good condition. Please also check if the
specification and quantity of accessory parts are correct.
Determine the correct handling route and methods, thus to avoid damaging the unit or causing
possible hazard. For the sake of protection and safety, it is suggested to move the unit with the
packaging box. Even though it is not permitted to do like this under special occasions, do not remove the
packaging box, thus to avoid loosening or falling during handling.
Confirm if the installing foundation is solid. When this unit is to be installed on the metal section of
the building, make sure that the electrical insulation must comply with applicable standards.
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