Hoval RoofVent CON-9, Design Handbook

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7 High-pressure fan exhaust air
The high-pressure fan exhaust air is used to overcome
additional pressure drops, e.g. through an extract air duct.
It replaces the standard exhaust air fan. Please note the
following:
■ Unit size 6: An additional pressure drop always results
in a lower nominal air flow rate. Due to the steeper fan
characteristic curve, however, the decrease in air flow rate
is smaller than for the standard fan.
■ Unit size 9: At nominal air flow rate, an additional pres-
sure drop of 220 Pa is provided compared to the standard
design.
Note
An additional pressure drop of at least 220 Pa is
required for correct operation of unit size 9.
Technical data
The technical data differs from the standard design as
follows:
■ Fan characteristics (see Table K7)
■ Sound levels (see Table K8, Table K9)
■ Nominal air flow rate (see Diagram K3, Diagram K4)
■ Heat output, max. mounting height: The values applicable
for the respective operating point are available upon
request.
Type HF-6 HF-9
Supply voltage V AC 3 x 400 3 x 400
Permitted voltage tolerance % ± 10 ± 10
Frequency Hz 50 50
Active power per motor kW 2.2 3.5
Current consumption A 4.3 8.5
Set point of thermal relays A 4.9 9.8
Speed of rotation (nominal) rpm 2860 1455
Table K7: Fan characteristics for the high-pressure fan exhaust air
Unit type LHW/LKW-6 LHW/LKW-9
2)
Operating mode VE2 VE2
Position
Sound pressure level (at a distance of 5 m)
1)
dB(A) 65 52 68 52
Total sound power level dB(A) 87 74 90 74
1)
with hemispherical radiation in a low-reflection environment
2)
outdoors (roof unit)
Table K8: Sound levels, RoofVent LHW/LKW with high-pressure fan exhaust air
Unit type LH/LK-6 LH/LK-9
Operating mode VE2 VE2
Position
Sound pressure level (at a distance of 5 m)
1)
dB(A) 68 59 67 60
Total sound power level dB(A) 90 81 89 82
1)
with hemispherical radiation in a low-reflection environment
2)
outdoors (roof unit)
Table K9: Sound levels, RoofVent LH/LK with high-pressure fan exhaust air
Options
High-pressure fan exhaust air