GB-13
D
GB
F
NL
I
E
Seal set for sizes 1 –
▷
When retrofitting accessories or a second valVario
control or when servicing, we recommend
replacing the seals.
C
A B
C
E
D
▷
Order No. for
size 1: Order No. 74921988,
size 2: Order No. 74921989,
size 3: Order No. 74921990.
▷
Scope of delivery:
A
1 x double block seal,
B
1 x retaining frame,
C
2 x O-rings (flange),
D
2 x O-rings (pressure switch),
for pressure test point/screw plug:
E
2 x sealing rings (flat sealing), 2 x profiled
sealing rings.
Cable gland with pressure equalization
element
▷
To avoid the formation of condensation, the cable
gland with pressure equalization element can be
used instead of the standard M20 cable gland.
The diaphragm in the gland is designed to ven-
tilate the device, without allowing water to enter.
▷
1 x cable gland, Order No.: 74924686
Technical data
Ambient conditions
Icing, condensation and dew in and on the unit are
not permitted.
Avoid direct sunlight or radiation from red-hot
surfaces on the unit. Note the maximum medium
and ambient temperatures!
Avoid corrosive influences, e.g. salty ambient air
or SO
2
.
The unit may only be stored/installed in enclosed
rooms/buildings.
The unit is suitable for a maximum installation
height of 2000 m AMSL.
Ambient temperature:
-20 to +60°C (-4 to +140°F), no condensation
permitted.
Long-term use in the upper ambient temperature
range accelerates the ageing of the elastomer ma-
terials and reduces the service life (please contact
manufacturer).
Storage temperature: -20 to +40°C (-4 to +104°F).
Enclosure: IP 65.
This unit is not suitable for cleaning with a high-
pressure cleaner and/or cleaning products.
Mechanical data
Gas types: natural gas, LPG (gaseous), biogas
(max. 0.1 %-by-vol. H
2
S) or clean air; other types
of gas on request. The gas must be clean and dry
in all temperature conditions and must not contain
condensate.
Medium temperature = ambient temperature.
CE and FM approved, UL listed, max. inlet pres-
sure p
u
: 500 mbar (7 psig).
FM approved, non operational pressure: 700 mbar
(10 psig).
ANSI/CSA approved: 350 mbar (5 psig).
Flow adjustment limits the maximum flow rate to
between approx. 20 and 100%. On VAS 1 – 3, the
setting can be monitored on an indicator.
Adjustment of the start gas rate: 0 to approx. 70%.
Opening times:
VAS../N quick opening: ≤ 1 s;
VAS../L slow opening: up to 10 s.
Closing time:
VAS../N, VAS../L quick closing: < 1 s.
Switching frequency:
VAS../N: max. 30 x per minute.
VAS../L: there must be a period of 20 seconds
between switching off and on again so that the
damping is fully effective.
Safety valve: Class A, Group 2 pursuant to
EN 13611 and EN 161.
Factory Mutual (FM) Research Class: 7400 and
7411,
ANSI Z21.21 and CSA 6.5.