Daikin SV1A25AJV1B User Reference And Installation Manual page 55

SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
0 50
0
- 38.01
-50
-100
-150
-200
-250
-300
Note: These curves present the internal pressure of the SV unit compared to an
ambient pressure of 101325 Pa.
Use the curve of the outlet pressure (P
for the SV unit. With an airflow rate of 115 m³/h, the resulting pressure drop
generated by the SV unit is 38.3 Pa.
0 50
0
- 38.33
-50
-100
-150
-200
-250
-300
Use the curves, with instructions how to read them, of the manufacturer of the
components to find the pressure drop generated by all components in the
ductwork. A conversion of units might be required. Beware that for ducting, the
pressure drop from the manufacturer might be given per unit length of ducting
(units are for example Pa/m). Multiply this value by the duct length to find the total
pressure drop.
ΔP ΔP
Ducting
[Pa/m] [Pa]
1
EXAMPLE
115
AFR
[m³/h]
Write down the pressure drop of each component in an overview table. Sum up
the pressure drops.
Nº Indication Type
1 a SV unit
2 b Duct
3 c Bend
4 b Duct
5 c Bend
6 b Duct
7 d Expander
8 e Duct
9 f Reducer
10 b Duct
11 b Duct
12 g Non-return valve
13 b Duct
14 h Wall grill
Select a fan with the required flow of 115 m³/h and a total pressure rise of
114.3 Pa.
Note: For ease of installation, we recommend to use in-line duct fans.
13 Special requirements for R32 units
|
115
100 150 200 250
AFR [m³/h]
OUT
) in function of the airflow rate (AFR
OUT
115
100 150 200 250
AFR [m³/h]
OUT
Bends
8
115
AFR
[m³/h]
AFR [m³/h]
115
"
"
"
"
"
"
"
"
"
"
"
"
"
Total pressure drop (sum of rows 1 to 14)
300
300
Length [m] ∆P [Pa/m]
- -
5 1
- -
10 1
- -
2 1
- -
6 0.5
- -
2 1
1 1
- -
1 1
- -
Installer and user reference guide
)
OUT
∆P [Pa]
38.3
5
8
10
8
2
4
3
6
2
1
11
1
15
114.3
55