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Installation instruction
1. Installation of Duct
2) Sectional shape of duct (mainly has rounded and rectangular two shapes)
16
3) Connecting mode
1)Duct material
Rectangular duct
The dimension of rectangular duct is the same as the air outlet of indoor unit,can be directly connected; the rounded
duct needs to be added with a static pressure box to connect with the air sending outlet of indoor unit; independently
introduced to respective distributor by rounded duct. In order to meet the requirements of room air conditioner,
the fan speed in each air outlet of any distributor shall be adjusted to basically the same.
Rounded duct
R=2.5d
d
b
a
a
b
R*3/2b
Number of duct outlet
Out unit static pressure (Pa)
Rectangular
duct
Diameter of dut*mm)
Noise dB(A)
Duct length (m)
Recommended applicable area(m )
Partial resistance of distributor(Pa)
1-2
30
700
100
200
Resistance along duct (Pa/m)
1.2
14*25
40/38/36
4
25
L(mm)
H(mm)
a
b
c
300255
788
Air
volume(m/h)
Static pressure(Pa)
Speed
201510
669 642
763
543
587
716
480
615
740
519 442
567
687
390
512
632
538
663
418463
3
4) Installation parameter
Good processing performance and structural hardness
Main useStructural characteristicMaterial
Nonmetal
material
Type
Thin metal sheet
Air volume-static pressure graph of duct type unit
Glass fibre reinforced
plastic
2
Air volume-static pressure of duct type unit
Cutline
High speed
Medium speed
Low speed
High speed
Medium speed
Low speed
400
600
800
0
10515202530
a
b
c
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Air volume(m/h)
*
*
*
Static pressure
value(Pa)
3
Aluminum orits alloy
Galvanize steel
Stainless steel
Generally used in ventilation duct system
Good anticorrosive performance
Storm protection system in
ventilation engineering
Good processing performance, corrosion resistant,
uneasily sparkle
Anticorrosive, acid-resistant
Anti-corrosive ventilation
engineering in chemical industry
Normal thin steel
Soft with compression resistant, simple installation
with vibration resistance
Sprayed a layer of 0.2~0.4mm plastic on the normal
thin steel
Widely used
Anti-corrosive, glazed surface, easy production
Aluminum foil soft
metal duct
Plastic compound steel
Stiff PVC plastic
Anti-corrosive, glazed surface, easy
production
With light, high intensity, noncombustible,
anti-corrosive, high temperature resistant characteristic
Air conditioning system needing
good dust protection and anti-
corrosive system under 10~70*
Applicable to the ambient condition
of 0*60 *,ventilation system
with corrosion of acid gas