Viessmann H32E, Инструкция по установке и обслуживанию, Страница: 55 / 80

55
Restrictor elements in air vent
2.
1.
Fig. 76 Example: 3 restrictor elements removed
(core and 2 rings)
Pressure drop for restrictor element in air vent, supply
air
0
Flow rate in m³/h
10 20 30 40 50
0
5
10
30
Pressure drop
in Pa 15
20
25
A B
C
D
E
Fig. 77
A
Core
B
1 ring
C
2 rings
D
3 rings
E
4 rings
Pressure drop for restrictor element in air vent, extract
air
0
Flow rate in m³/h
10 20 30 40 50
0
10
20
30
40
50
Pressure drop
in Pa
A B
C
D
E
Fig. 78
A
Core
B
1 ring
C 2 rings
D 3 rings
E
4 rings
Setting the air flow rate on the iris diaphragm
Set the aperture of the iris diaphragm on the aperture
ring scale.
Read the setting using the calculated air flow rate and
the pressure drops from the diagrams.
The pressure can be determined at the test connector:
See Fig. 22 on page 25. Note
If the system settings have been calculated, set the iris
diaphragm based on the calculation.
Commissioning, inspection, maintenance
Presetting the air flow rate
(cont.)
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