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8
(2)
The air diffuser should be installed in the places where the temperature actual
need to be cooled. It depends on volume and velocity to select the specification of air
diffuser. The air diffuser is made of aluminum alloy or plastic and the type can be selected
according to the actual situation. We recommend both single and double deflection grille.
The average velocity in the duct is supposed to be at 3—6 m/s. The air draft can be
controlled as a regulating valve is proposed to use.
(3)
The specification of the duct is designed by the hypothetical flow velocity, the wind
velocity in the main duct is kept at 6—8m/s, while in the branch is 4—5m/s and 3—4m/s
in the end.
(4)
The duct system is required to be economical and to be kept sooth as well as quite,
that makes the perfect air draft. To reduce flow resistance, the elbow’s radius of curvature
is no less than 1.5 times the width of duct.
(5)
The air duct should not be too long; the maximum length is 20m.
(6)
Try to distribute the duct straightly to avoid the turnings or branches, and save the
duct cost.
(7)
On the plan layout, try to adopt the electrical grill diffuser instead of the duct, if do
need the duct, try to make it shorter.
(8)
Based on different airflow, variable sizes duct and reducer pipe is required. But the
reducer
pipe cannot over 4 in a system. The length ≥2
（
D-d
）
(9)
The duct and air cooler unit joint should be connected with soft air pipe.
(10)
Setting a valve or diffuser board is needed if any duct branch.
Power and water supply
(1)
The water should be clean, tap water is often used and water source pressure
should be at 0.10~0.3 MPa (1~3kgf/cm2).
(2)
There should be a stop valves (DN20) in the hose and obligate a pine joint.
(3)
Keep the stable voltage supply at rated ±5 V.
