English
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9.3 Level Check of the Indoor Unit
After the indoor unit is installed, it is required to check the level of the whole unit. The unit must be placed
horizontally, but the condensate pipe shall be installed obliquely, so as to facilitate the drainage of condensate.
Air Supply
B
Air Intake
Condensate Drainpipe
Level Instrument
Condensate Drainpipe
Enlarged View
i
As the inside of the unit is in
the negative pressure
status, it is required to set
up a backwater elbow. The
requirements is:
A=B
q
P/10+20(mm)
P is the absolute pressure
inside the unit. The unit of
the pressure is Pa.
9.4
Fig.
9.4 Installation of Rectangular Air Pipe
Air Intake
Ceiling Mount
Air Intake
1
2
Air Supply
Air Supply
3
4
5
3
6
7
No. Name
No. Name
1
Hook
5
Filter
2
Air Intake
Pipe
6
Main Air
Supply Pipe
3
Canvas Air
Pipe
7
Air Supply
Outlet
4
Air Intake
9.5
Fig.
CAUTION
The air supply pipe, the air intake pipe and the fresh air pipe must be covered with a layer of thermal
•
insulation, so as to avoid thermal leakage and condensation. Firstly apply liquid nail on the pipes, then,
attach the thermal insulation cotton with a layer of tinfoil. Use the liquid nail cover to fi x it. Lastly use tinfoil
adhesive tape to carefully seal the joints. Other good thermal insulation materials can also be used.
The air supply pipes and the air intake pipes shall be fi xed to the prefabricated boards of the ceiling by
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using iron supports. The joints of the pipes must be sealed by glue so as to avoid leakage.
The design and installation of air pipes must be in conformity with the relevant state engineering criteria.
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The edge of the air intake pipe must be at least 150mm away from the wall. The air intake must be covered
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with fi lter.
Silencing and shock absorption shall be considered in the design and installation of the air pipes. Addition-
•
ally, the noise source must be far away from where people stay. The air intake shall not be located above
the place where users stay (offi ces and rest places, etc.).