Installation Precedure

Indoor Unit

6. Installation of air suction and discharging duct

Please consult the after-sales service personnel for the choosing and installation of suction inlet, suction duct, discharging outlet and discharging duct. Calculating the design drawing and outer static pressure, and choose the discharging duct with proper length and shape.

muffler cavity (air sending)

 

 

Sacking joint

 

Enlarging chart of profile chart A

 

 

 

 

Insulation

 

A

Air volume adjuster

 

 

Air outlet

Air conditioner

Ceiling

 

 

main unit

 

Vibration resistance hook

 

 

Air suction grille with air filter

 

 

Checking meatus

 

The length difference among every duct is limited below 2:1.

Reduce the length of duct as possible as can.

Reduce the amount of bend as possible as can.

Use heat insulation material to bind and seal the part connecting main unit and the flare part of air discharging duct. Perform duct installation work, before the fitment of ceiling.

7. Calculation method of the dimension of the simple quadrate air duct

Presuming the unit length friction impedance of the duct is 1Pa/m, when the dimension of one side of the air duct is fixed as 250mm, as shown below:

 

AD842AHEAA

B

 

Air volume

Duct

 

A

2400m3/h(40m3/min)

250x560(mmxmm)

 

B

600m3/h(10m3/min)

250x190(mmxmm)

 

Bad example

Bad example

Good example

 

 

 

AAir conditioner

 

A

 

A

Static pressure

Equipped with

 

box

air filter (bought)

The calculation of duct resistance (the simple calculation is as follow table)

Straight part

Calculate as per 1m length 1Pa, 1Pa/m

 

 

Bend part

Each bend takes as a 3~4m long straight duct

 

 

Air out part

Calculate as 25Pa

 

 

Static pressure box

Calculate as 50Pa/each

 

 

Air inlet grille (with air filter)

Calculate as 40Pa/each

 

 

The chosen chart of simple duct Note:1Pa/m=0.1mmAg/m

Shape

Square duct

Air volume

Item

Dimension

m3/h(m3/n)

 

(mmxmm)

100

 

250 x 60

200

 

250 x 90

300

 

250 x 120

400

 

250 x 140

500

 

250 x 170

600(10)

 

250 x 190

800

 

250 x 230

1,000

 

250 x 270

1,200(20)

 

250 x 310

1,400

 

250 x 350

1,600

 

250 x 390

Shape

Square duct

Air volume Item

Dimension

m3/h(m3/n)

(mmxmm)

1,800(30)

250 x 430

2000

250 x 470

2400

250 x 560

3,000(50)

250 x 650

3,500

250 x 740

4,000

250 x 830

4,500

250 x 920

5,000

250 x 1000

5,500

250 x 1090

6,000(100)

250 x 1180

17

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Haier AD842AHEAA, AU84NATEAA operation manual Indoor Unit Installation of air suction and discharging duct

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