VESSER CGU12N, Service Instructions Manual, Page: 50 / 177

47
QSPEVDU
No. Designation No. Designation
1 Hanger rod 6 Transition duct
2 Air return duct 7 Air supply duct
3 Canvas duct 8 Air diffuser
4 Return air shutter 9 Connector of air diffuser
5 Air outlet
Note:
The above two diagrams show how back return air inlets are installed. Lower return air inlets shall be used
according to actual installation demands. The installation method is similar to the back return air inlets. Among
all air outlets, at least one keeps open. If circular duct is in use, air shall be supplied to rooms through circular
ÀH[LEOHLQVXODWLQJGXFW$LUVXSSO\GXFWDQGUHWXUQGXFWVKDOOEHKHDWLQVXODWHG
2. Installation of fresh air duct (only limited to excessive pressure units with refrigerating output over 6000W)
‹ The fresh air battle, as shown in Figure 1-1-13(a), must be removed for mounting the fresh air duct. If the
fresh air duct is not in use, gaps around the battle shall be sealed by sponge.
‹ &LUFXODUÀDQJHVDUHPRXQWHGIRUFRQYHQLHQWFRQQHFWLRQRIWKHIUHVKDLUGXFWDVVKRZQLQ)LJXUHE
‹ 'XFWVDQGFLUFXODUÀDQJHVPXVWEHVHDOHGDQGLQVXODWHGVXI¿FLHQWO\
‹
)UHVKDLUPXVWEH¿OWHUHGDLU
Wipe off
Wipe off
Fresj air baffle
Round air pipe
Figure 1-1-13
3. Installation of air return duct
‹ 6TXDUHÀDQJHVDWH[IDFWRU\VKDOOEHGHIDXOWHGWRLQVWDOODWLRQDWWKHEDFNDQGWKHDLUUHWXUQFRYHUSODWHVKDOO
EHPRXQWHGDWWKHORZHUDVVKRZQLQ¿JXUH
Down air intake
Back air intake
Squareness flange
Air intake cover board
Figure 1-1-14
‹
,IORZHUDLUUHWXUQLVGHPDQGHGWKHVTXDUHÀDQJHDQGWKHDLUUHWXUQFRYHUSODWHVKRXOGEHH[FKDQJHGLQ
their respective position.
‹
The air return duct shall be connected to the air return inlet on the indoor unit with rivets, and the other end
of the air return duct is connected to an air return window. To freely adjust the height, a section of canvas
duct can be fabricated and reinforced by 8# iron wires in the folding shape. A proper installation method
shall be selected by taking into overall consideration of building and maintenance conditions.