VAA · Edition 05.22
EN-9
6
7
8
9
10
11
12
Insert new circuit board.
13
Follow the reverse procedure when reassembling.
14
Re-establish all connections.
➔
Wire the new circuit board, see page 3 (4
Wiring).
➔
Leave the connection box open for the electrical
system test.
9.2 electric strength test
1
Once the wiring has been carried out and before
the devices are commissioned, a voltage surge
test must be carried out.
Test points: mains connection terminals (N, L) with
respect to PE wire terminal (PE ).
Rated voltage > 150 V: 1752 V AC or 2630 V DC,
testing time 1 second.
Rated voltage ≤ 150 V: 1488 V AC or 2240 V DC,
testing time 1 second.
2
Screw the cover onto the connection box once the
electrical test has been completed successfully.
3
The unit is fit for use again.
10 MAIntenAnCe
CAUtIon
In order to ensure smooth operation, check the
device function:
– Check electrical installations once a year in line
with local regulations; pay particular attention to
the PE wire, see page 3 (4 Wiring).
11 ACCessoRIes
11.1 Pressure switch for gas DG..VC
The pressure switch for gas monitors the inlet pres-
sure p
u
and the outlet pressure p
d
.
➔
Monitoring the inlet pressure p
u
: the pressure
switch for gas is mounted on the inlet side.
Monitoring the outlet pressure p
d
: the pressure
switch for gas is mounted on the outlet side.
p
u
p
d
Scope of delivery:
1 x pressure switch for gas,
2 x self-tapping retaining screws,
2 x sealing rings.
Also available with gold-plated contacts for voltages
of 5 to 250 V.
➔
When retrofitting the pressure switch for gas, see
enclosed operating instructions “Pressure switch-
es for gas DG..C”, section entitled “Mounting the
DG..C.. on valVario gas solenoid valves”.
➔
The switching point is adjustable via hand wheel.
1
2
3
type
Adjusting range
(adjusting
tolerance =
± 15% of the
scale value)
Mean switching
differential at
min. and max.
setting
[mbar]
["WC]
[mbar]
["WC]
DG 17VC
2–17
0.8–6.8 0.7–1.7 0.3–0.8
DG 40VC
5–40
2–16
1–2
0.4–1
DG 110VC 30–110
12–44
3–8
0.8–3.2
DG 300VC
100–
300
40–120
6–15
2.4–8
➔
Deviation from the switching point during testing
pursuant to EN 1854 Gas pressure switches:
± 15%.