Kromschroeder VAS 1-3 User manual

CONTENTS
Cert. Version 07.19 · Edition 01.21 · EN · 03250322
DE, EN, FR, NL, IT, ES, DA, SV, NO, PT, EL, TR, CS, PL, RU, HU – www.docuthek.com
Solenoid valve for gas VAS1–3,
double solenoid valve VCS1–3
Safety .................................1
Changes to edition 07.19 ..................1
Checking the usage ......................2
Installation ..............................2
Wiring .................................4
Tightness test ...........................5
Commissioning ..........................6
Replacing the actuator ....................6
Replacing the damping unit.................8
Maintenance ............................8
Accessories.............................9
Technical data ..........................13
Air flow rate Q ..........................14
Designed lifetime........................15
Certification ............................15
Logistics ..............................16
Disposal ..............................16
SAFETY
Please read and keep in a safe place
Please read through these instructions care-
fully before installing or operating. Following the installa-
tion, pass the instructions on to the operator. This unit
must be installed and commissioned in accordance
with the regulations and standards in force. These
instructions can also be found at www.docuthek.com.
Explanation of symbols
1, 2, 3, a,b, c = Action
➔= Instruction
Liability
We will not be held liable for damage resulting from
non-observance of the instructions and non-com-
pliant use.
Safety instructions
Information that is relevant for safety is indicated in the
instructions as follows:
DANGER
Indicates potentially fatal situations.
WARNING
Indicates possible danger to life and limb.
CAUTION
Indicates possible material damage.
All interventions may only be carried out by qualified
gas technicians. Electrical interventions may only be
carried out by qualified electricians.
Conversion, spare parts
All technical changes are prohibited. Only use OEM
spare parts.
CHANGES TO EDITION 07.19
The following chapters have been changed:
–Checking the usage
–Wiring
–Accessories
–Logistics
–Disposal
OPERATING INSTRUCTIONS

VAS1–3 · Edition 01.21
EN-2
CHECKING THE USAGE
Gas solenoid valves VAS for safeguarding gas or air on
various appliances. Double solenoid valves VCS are
combinations of two gas solenoid valves.
This function is only guaranteed when used within the
specified limits – see page 13 (Technical data). Any
other use is considered as non-compliant.
Type code
VAS Solenoid valve for gas
1-3 Sizes
–Without flange
10–65 Inlet and outlet flange nominal size
RRp internal thread
FFlange to ISO 7005
NNPT internal thread
/N Quick opening, quick closing
/L Slow opening, quick closing
WMains voltage 230V AC, 50/60Hz
QMains voltage 120V AC, 50/60Hz
KMains voltage 24V DC
PMains voltage 100V AC, 50/60Hz
YMains voltage 200V AC, 50/60Hz
SWith PS and visual position indicator
GWith PS for 24V and visual position
indicator
RViewing side: right
LViewing side: left

Part designations
VAS..S,
VAS..G
VAS
5
3
1
6
7
4
2
1 Solenoid actuator
2 Flow body
3 Connection box
4 Connection flange
5 Closed position indicator
6 Connection parts
7 Sealing plug
Type label
Mains voltage, electrical power consumption, ambient
temperature, enclosure, inlet pressure and installation
position: see type label.
Elster GmbH
Osnabrück, Germany
Vxx
.XXXX
INSTALLATION
CAUTION
Incorrect installation
Please observe the following to ensure that the
unit is not damaged during installation and oper-
ation:
–Sealing material and dirt, e.g. thread cuttings,
must not be allowed to get into the valve
housing.
–A filter must be installed upstream of every
system.
–Dropping the device can cause permanent
damage. In this event, replace the entire device
and associated modules before use.
–Do not clamp the unit in a vice. Only secure the
flange by holding the octagon with a suitable
spanner. Risk of external leakage.
–It is not permitted to install gas solenoid
valveVAS downstream of flow rate regula-
torVAH/VRH and upstream of fine-adjusting
valveVMV. The VAS would no longer be able to
perform its function as a second safety valve if
installed in the above-mentioned position.
–If more than three valVario controls are installed
in line, the controls must be supported.
–Solenoid valves with overtravel switch and visual
position indicator VAS..SR/SL: actuator cannot
be rotated.
–In the case of double solenoid valves, the
position of the connection box can only be
changed by removing the actuator and
reinstalling it rotated by 90° or180°.
➔ When joining two valves, determine the position
of the connection boxes, push through the knock-
outs in the connection boxes and install a cable
gland set before installation in the pipework, see
accessories, cable gland set for double solenoid
valves.
➔ Install the unit in the pipe free of mechanical stress.
➔ For retrofitting a second gas solenoid valve, use the
double block seal instead of O-rings. The double
block seal is supplied with the seal set, see acces-
sories, seal set for sizes1–3.
➔Installation position: black solenoid actuator in the
vertical upright position or tilted up to the horizontal,
not upside down. In humid environments: black
solenoid actuator in the vertical upright position only.

VAS1–3 · Edition 01.21
EN-3
➔The housing must not be in contact with masonry,
minimum clearance 20mm (0.79").
➔Ensure that there is sufficient space for installation,
adjustment and maintenance work. Minimum clear-
ance of 50 cm (19.7") above the black solenoid
actuator.
pd
pu
➔ The inlet pressurepuand the outlet pressurepd
can be measured using the pressure test points
on both sides, see accessories.
Strainer
➔ A strainer must be fitted in the unit on the inlet side.
If two or more gas solenoid valves are installed in
line, then a strainer only needs to be fitted on the
inlet side of the first valve.
Differential pressure orifice
➔If pressure regulator VAD/VAG/VAV1 is retrofitted
upstream of gas solenoid valve VAS1, a DN25
differential pressure orifice with outlet opening
d=30mm(1.18") must be inserted at the outlet
of the pressure regulator. In the case of pressure
regulator VAx115 or VAx120, the DN25 differential
pressure orifice must be ordered separately and
retrofitted, Order No.74922240.
➔ The retaining frame must be fitted to secure the dif-
ferential pressure orifice at the outlet of the regulator.
Retaining frame
➔ If two controls (regulators or valves) are assembled, a
retaining frame with double block seal must be fitted.
Order No. for seal set: size 1: 74921988, size 2:
74921989, size 3: 74921990.
Compression fittings
➔ The seals in some compression fittings are ap-
proved for temperatures of up to 70°C (158°F). This
temperature limit will not be exceeded if the flow
through the pipe is at least 1m3/h (35.31SCFH)
of gas and the maximum ambient temperature is
50°C (122°F).
1 Remove the adhesive label or screw cap from the
inlet and outlet.
2 Obey the direction of flow as marked on the hous-
ing.
VAS1–3 with flanges
a b c
VAS1–3 without flanges
a b c
➔O-ring (Fig. c) must be fitted.
d e f
g

VAS1–3 · Edition 01.21
EN-4
WIRING
WARNING
Risk of injury!
Please observe the following to ensure that no
damage occurs:
– Electric shocks can be fatal! Before working on
possible live components, ensure the unit is
disconnected from the power supply.
– The solenoid actuator heats up during
operation. Surface temperature approx. 85°C
(approx. 185°F).
➔Use temperature-resistant cable (>80°C).
1 Disconnect the system from the electrical power
supply.
2 Shut off the air supply.
➔ UL requirements for the NAFTA market. To maintain
the UL environmental rating Type 2, the enclosure
openings shall be closed with fittings rated UL Type
2; 3; 3R; 3RX; 3S; 3SX; 3X; 4X; 5; 6; 6P; 12; 12K
or 13. Gas solenoid valves shall be protected by a
branch circuit protective device not exceeding 15A.
➔Wiring to EN60204-1.
➔ Push through and remove the knock-out in the
connection box before removing the cover. If the
M20 cable gland or plug is already fitted, it is not
necessary to remove the knock-out.
3 4
M20 cable gland
a b c
d e
(+)
LV1 N
(-)
LV1 NLV1 N
(+) (+) (-)(-)
Plug
➔LV1V1 (+) = black, LV1V2 (+) = brown, N (–) = blue
a b
LV1
(+)
N
(-)
LV1 NLV1 N
(+) (+) (-)(-)
Socket
➔1 = N (–), 2 = LV1V1 (+), 3 = LV1V2 (+)
a b c
d e
21
21
3
Proof of closure switch
➔ VAS 1–3 open: contacts 1and2closed,
VAS1–3 closed: contacts 1and 3closed.
➔ Indicator of proof of closure switch: red = VAS1–3
open, white = VAS1–3 closed.
➔ Double solenoid valve: if a plug with socket is fitted,
only one proof of closure switch can be connected.

VAS1–3 · Edition 01.21
EN-5
CAUTION
Please observe the following to ensure smooth
operation:
– The proof of closure switch is not suitable for
frequent cycling operation.
– Route valve and proof of closure switch cables
separately through M20 cable glands or use two
separate plugs. Otherwise, there is a risk of
interference between valve voltage and proof of
closure switch voltage.
➔To make wiring easier, the connection terminal for
the proof of closure switch can be removed.
1
2
Valve open
Valve closed
COM 3
1 32
LV1
(+)
N
(-)
1 32 LV1
(+)
N
(-)
1 3
2LV1
(+)
N
(-) 132 LV1 (+)
N
(-)
LV1
(+)
N
(-)
1
2
Valve open
Valve closed
COM 3
1 32
LV1
(+)
N
(-)
➔ When installing two plugs on VAS1–3 a with proof
of closure switch: label the sockets and plugs to
avoid confusion.
21
3
21
1
COM
2
Valve open
Valve closed
3
➔Ensure that the connection terminal for the proof
of closure switch has been reconnected.
Finishing the wiring
5
TIGHTNESS TEST
1 Close the gas solenoid valve.
2 To be able to check the tightness, shut off the
downstream pipeline close to the valve.
3
0
4
5
0
6 Open the solenoid valve.
7
0
8
9 Tightness OK: open the pipeline.
➔
Pipeline leaking: replace the seal
on the flange, see accessories.
Order No. for seal set: size 1: 74921988,
size 2: 74921989, size 3: 74921990.
Then check for tightness once again.
➔ Unit leaking: remove the unit and return it to the
manufacturer.

VAS1–3 · Edition 01.21
EN-6
COMMISSIONING
Setting the flow rate
➔At the factory, the valve is adjusted for maximum
flow rateQ.
➔ The markings on the cover cap can be used for
coarse adjustment of the flow rate.
➔ The cover cap can be rotated without changing
the current flow rate.
➔Allen key: 2.5mm.
➔Do not turn beyond the “max.” setting.
Q [%]
max.
min.
100
0
U
-+
min.
max.
➔ The VAS1–3 remains tight even if the adjusting
screw is overturned.
Setting the start rate on the VAS1–3../L
➔The start rate can be set by turning the damping
unit a maximum of 5turns.
➔
There must be a period of 20 seconds between
switching the valve off and on again so that the
damping is fully effective.
➔ Loosen the M5 setscrew (2.5mm hexagon socket),
but do not unscrew completely.
1 2
3 Turn the damping unit clockwise to the zero setting/
as far as possible.
4
-+
5
6 Screw the M5 setscrew back in.
Setting the damping speed on the VAS1–3../L
➔
The opening speed can be influenced by turning
the nozzle screw on the damping unit.
CAUTION
Attention! To avoid leakage, please observe the
following:
–If the nozzle screw is turned by more than
1turn, the damping unit will leak and will have
to be replaced.
➔Turn the nozzle screw a maximum of 1/2 a turn in
the appropriate direction.
-
+
REPLACING THE ACTUATOR
➔ The actuator adapter set is enclosed with new
actuators.
VAS 2, VAS 2VAS 1
Removing the actuator
VAS without damping unit
1 Disconnect the system from the electrical power
supply.
2 Close the gas supply.
3 4 5
6 7 8
➔ Remove the M20 cable gland or other type of
connection.
VAS without proof of closure switch
a b c
VAS with proof of closure switch
a b c
d e
VAS with damping unit
1 Disconnect the system from the electrical power
supply.
2 Close the gas supply.
➔
Remove the M20 cable gland or other type of
connection.
➔Loosen the setscrews, but do not unscrew com-
pletely (M3 = 1.5mm hexagon socket, M5 =
2.5mm hexagon socket).

VAS1–3 · Edition 01.21
EN-7
3
M3
4 5
M5
6
1.
2.
7 8
9 10 11
Fitting the new actuator
➔The seals of the actuator adapter set are covered
with a non-stick coating. No additional grease is
required.
➔ Depending on the construction stage of the unit, there
are two different methods for replacing the actuator:
If the unit concerned has no O-ring in this place
(arrow), replace the actuator as described here.
Otherwise, go to the next note.
1
2 Insert seals.
3 Position of the metal ring can be selected.
4
VAN 1 VAN 2
5 Slide seal under the second groove.
6
➔ If the unit concerned has an O-ring in this place
(arrow), replace the actuator as described here:
VAS 1: use all seals from the actuator adapter set.
VAS2, VAS3: use the small seal from the actuator
adapter set and only one of the large seals.
1 2
VAN 1–2
3 Slide seal under the second groove.
4
VAS without damping unit
1 2 3
4 5 6
7 Open the gas solenoid valve and the gas supply.
VAS with proof of closure switch
➔
Depending on the design of the proof of closure
switch, one of the two enclosed seals must be
inserted in the connection box housing.
1 2 3
4 5 6
7 8 9
10 11 12
13 Open the gas solenoid valve and the gas supply.

VAS1–3 · Edition 01.21
EN-8
VAS with damping unit
1 2 3
4 5 6
7
1.
2.
8 9
M3
10 Screw in the M3 setscrews.
11 Open the gas solenoid valve and the gas supply.
12 Set the start gas rate, see page 6 (Setting the
start rate on the VAS 1–3../L).
The connection between solenoid actuator and
damping unit must then be checked for tightness.
13 14
REPLACING THE DAMPING UNIT
1 Disconnect the system from the electrical power
supply.
2 Close the gas supply.
➔Loosen the M3 setscrews (1.5mm hexagon sock-
et), but do not unscrew completely.
3
M3
4 5
6 Set the start gas rate, see page 6 (Setting the
start rate on the VAS 1–3../L).
The connection between solenoid actuator and
damping unit must then be checked for tightness.
7 8
MAINTENANCE
CAUTION
In order to ensure smooth operation, check the
tightness and function of the unit:
– Once per year, twice per year in the case of
biogas; check for internal and external
tightness, see page 5 (Tightness test).
– Check electrical installations once a year in line
with local regulations; pay particular attention to
the PEwire, see page 4 (Wiring).
➔If the flow rate has dropped, clean the strainer.
➔ If more than one valVario control is installed in
series: the controls may only be removed from
the pipeline and reinstalled on the inlet and outlet
flange all at once.
➔We recommend replacing the seals, see accesso-
ries, page 9 (Seal set for sizes 1–3).
1 Disconnect the system from the electrical power
supply.
2 Shut off the gas supply.
3 Undo connection parts.
4 5 6
7 8
9 Once the seals have been replaced, follow the
reverse procedure to reassemble the unit.
10 Then check the unit for internal and external tight-
ness, see page 5 (Tightness test).

VAS1–3 · Edition 01.21
EN-9
ACCESSORIES
Pressure switch for gas DG..VC
The pressure switch for gas monitors the inlet pres-
surepu, the interspace pressurepzand the outlet
pressurepd.
➔ Monitoring the inlet pressure pu: 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
pd
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 using two pressure switches on the same side
of the double solenoid valve, only the combination
DG..C..1 and DG..C..9 may be used for design rea-
sons.
DG..C..1
DG..C..1
DG..C..9
pu
pz
DG..C..9
➔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%.
Seal set for sizes 1–3
When retrofitting accessories or a second valVario
control or when servicing, we recommend replacing
the seals.
C
AB
C
E
D
VAS1–3
VA1, Order No. 74921988,
VA2, Order No. 74921989,
VA3, Order No. 74921990.
Scope of delivery:
A1 x double block seal,
B1 x retaining frame,
C2 x O-rings (flange),
D2 x O-rings (pressure switch),
for test nipple/screw plug:
E2 x sealing rings (flat sealing),
2 x profiled sealing rings.
VCS1-3
VA1, Order No. 74924978,
VA2, Order No. 74924979,
VA3, Order No. 74924980.

VAS1–3 · Edition 01.21
EN-10
Scope of delivery:
A1 x double block seal,
B1 x retaining frame.
Tightness control TC1V
1 Disconnect the system from the electrical power
supply.
2 Shut off the gas supply.
➔
The solenoid actuator cannot be rotated on so-
lenoid valves with proof of closure switch VCx..S
or VCx..G.
➔ Connect the TC to the inlet pressure connectionp
u
and the interspace pressure connectionpzof the
inlet valve. Ensure that connections puand pzon
the TC and the gas solenoid valve are not reversed.
➔ TC and bypass/pilot gas valve cannot be fitted
together on the same side of the double block valve.
➔ In the case of a VCx combination, it is recommend-
ed to always install the bypass/pilot gas valve on the
rear of the second valve and the tightness control
on the viewing side of the first valve, together with
the connection box.
➔The TC is secured using two captive, self-tapping
combination Torx screws T20(M4) inside the hous-
ing. Do not undo any other screws!
Torx T20
3 4 5
6 7
pz
pu
8
max. 250 Ncm
➔ For more information on wiring, testing the tight-
ness and commissioning, see enclosed “Tightness
control TC1, TC2, TC3” operating instructions.
9 After completing the wiring, tightness test and
commissioning for the TC, refit the housing cover
on the TC.
Cable gland set
When wiring double solenoid valve VCx1–3, the connec-
tion boxes are to be connected using a cable gland set.
The cable gland set can only be used if the connection
boxes are at the same height and on the same side
and if both valves are equipped either with or without
a proof of closure switch.
VCx 1 VCx 2 VCx 3
VA1, Order No. 74921985,
VA2, Order No. 74921986,
VA3, Order No. 74921987.
➔We recommend preparing the connection boxes
before the double solenoid valve is installed in the
pipework. Alternatively, one of the actuators must
be dismantled as described below and reinstalled
rotated by 90° in preparation for installation of the
double solenoid valve.
1 Disconnect the system from the electrical power
supply.
2 Close the gas supply.
3 4 5
6 7 8
➔ In both connection boxes, push through the knock-
out for the cable gland set – then remove the covers.
The covers must not be taken off before pushing
through the knock-outs as it prevents damage to
the connection boxes.
9 10
11 12 13
14 15 16

VAS1–3 · Edition 01.21
EN-11
17 Connect the valves to the electrical power supply,
see section entitled “Wiring”.
18
Attachment block VA1–3
For locked installation of pressure gauge or other ac-
cessories on the gas solenoid valve VAS1–3.
B
A
C
Attachment block Rp1/ 4, Order No. 74922228,
Attachment block 1/4NPT, Order No. 74926048.
Scope of delivery:
A1 x attachment block,
B2 x self-tapping screws for installation,
C2 x O-rings.
1 Disconnect the system from the electrical power
supply.
2 Close the gas supply.
➔
Use the enclosed self-tapping screws for instal-
lation.
3 4 5
6 7 8
9
10 Shut off the downstream gas pipeline close to the
solenoid valve.
11 Open the solenoid valve.
12 13
Bypass/pilot gas valves
Prepare the installed main valve.
1 Disconnect the system from the electrical power
supply.
2 Close the gas supply.
➔Turn the actuator so that the side on which the by-
pass/pilot gas valve is to be installed is accessible.
3 4 5
VBY for VAx 1
Ambient temperature: 0 to +60°C (32 to 140°F), no
condensation permitted.
Enclosure: IP 54.
Scope of delivery
B
C
A
VBY 8
VAS 1
VBY8I as bypass valve
A1 x bypass valve VBY 8I
B2 x retaining screws with 4 x O-rings: both retain-
ing screws have a bypass orifice
VBY..I
C1 x grease for O-rings
➔The screw plug at the outlet remains in place.
VBY8R as pilot gas valve
A1 x pilot gas valve VBY 8R
B2 x retaining screws with 5 x O-rings: one retain-
ing screw has a bypass orifice (2xO-rings), the
other does not (3xO-rings)
VBY..R
C1 x grease for O-rings
➔Remove the screw plug at the outlet and connect
the Rp1/4 pilot gas supply line.

VAS1–3 · Edition 01.21
EN-12
Mounting the VBY
1 Grease O-rings.
2 3 4
5
➔ Tighten the retaining screws alternately so that VBY
and VAx are flush.
Setting the flow rate
➔
The flow rate can be set by turning the flow rate
restrictor (4mm hexagon socket) 1/4 of a turn.
+
-
➔ Only adjust the flow rate restrictor in the marked
range, otherwise the required gas volume will not
be reached.
6 Wire the socket, see section entitled “Wiring”.
7 Check for tightness, see accessories, “Checking
the bypass/pilot gas valve for tightness”.
VAS1 for VAx 1, VAx 2, VAx 3
Scope of delivery
VAS 1 VAS 2/3
A
C
DF
B
E
A1 x bypass/pilot gas valve VAS1,
B4 x O-rings,
C4 x double nuts for VAS1 –> VAx1,
C4 x spacer sleeves for VAS1 –> VAx2/VAx3,
D4 x connection parts,
E1 x mounting aid.
Pilot gas valve VAS1:
F1 x connection pipe, 1 x sealing plug, if the pilot
gas valve has a threaded flange on the outlet side.
Bypass valve VAS1:
F2 x connection pipes, if the bypass valve has a
blind flange on the outlet side.
Standard: Ø10mm.
➔Always use a connection pipe Fat the inlet of the
main valve.
➔ For a bypass valve: use connection pipe F
Ø10mm(0.39") at the outlet of the main valve
if the bypass valve’s outlet flange is designed as
a blind flange.
➔For the pilot gas valve: insert sealing plug Fat the
outlet of the main valve if the pilot gas valve’s outlet
flange is designed as a threaded flange.
1
F
B
B
2 3
4 Remove the sealing plugs on the mounting side of
the bypass valve.
Mounting the VAS1 to VAx 1
a Remove the nuts from the connection parts on the
mounting side of the main valve.
b Remove the connection parts of the bypass/pilot
gas valve.
➔Use the new connection parts Cand Dfrom the
scope of delivery for the bypass/pilot gas valve.
c
C
D
d
e f
g Wire the bypass/pilot gas valve VAS1, see section
entitled “Wiring”.
h Check for tightness, see accessories, “Checking
the bypass/pilot gas valve for tightness”.
Mounting the VAS1 to VAx 2 or VAx 3
➔
The connection parts of the main valve remain
mounted.
a Remove the connection parts of the bypass/pilot
gas valve.
b Use the new connection parts Cand Dfrom the
scope of delivery for the bypass/pilot gas valve. For
VAx2 and VAx3, the connection parts consist of
self-tapping screws.
c
C
D
d
e
f Wire the bypass/pilot gas valve VAS1, see section
entitled “Wiring”.

VAS1–3 · Edition 01.21
EN-13
g Check for tightness, see accessories, “Checking
the bypass/pilot gas valve for tightness”.
Checking the bypass/pilot gas valve for tight-
ness
1 To be able to check the tightness, shut off the
downstream pipeline as close as possible to the
valve.
2 Close the main valve.
3 Close the bypass/pilot gas valve.
CAUTION
Possible leakage!
– If the actuator of the VBY is rotated, the
tightness can no longer be guaranteed. To
ensure that there are no leaks, check the
actuator of the VBY for tightness.
a b
Check the bypass/pilot gas valve for tightness at the
inlet and outlet.
4 5
6
0
7 Open the bypass or pilot gas valve.
Bypass valve
8 9
Pilot gas valve
10 11
12
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 SO2.
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. H2S) 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pu: 500mbar (7.25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 be-
tween approx. 20 and 100%.
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 be-
tween 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.
Valve housing: aluminium, valve seal: NBR.
Connection flanges:
Up to size3: Rp to ISO7-1, NPT to ANSI/ASME;
size2 and higher: with PN16 ISO flange (pursuant
to ISO7005);

VAS1–3 · Edition 01.21
EN-14
size6 and higher: with ANSI flange pursuant to
ANSI150.
Cable gland: M20x1.5.
Electrical connection: cable with max. 2.5mm2
(AWG12) or plug with socket to EN175301-803.
Duty cycle: 100%.
Power factor of the solenoid coil: cosφ=0.9.
Electrical data for VAS1–3/VCS1–3
Mains voltage:
230VAC, +10/-15%, 50/60Hz;
200VAC, +10/-15%, 50/60Hz;
120VAC, +10/-15%, 50/60Hz;
100VAC, +10/-15%, 50/60Hz;
24VDC, ±20%.
Power consumption:
Type Voltage Power
VAS1 24V DC 25 W
VAS1 100VAC 25 W (26 VA)
VAS1 120VAC 25 W (26 VA)
VAS1 200VAC 25 W (26 VA)
VAS1 230VAC 25 W (26 VA)
VAS2,
VAS3 24V DC 36 W
VAS2,
VAS3 100VAC 36 W (40 VA)
VAS2,
VAS3 120VAC 40 W (44 VA)
VAS2,
VAS3 200VAC 40 W (44 VA)
VAS2,
VAS3 230VAC 40 W (44 VA)
VBY 24V DC 8 W
VBY 120VAC 8 W
VBY 230VAC 9.5 W
Contact rating of proof of closure switch:
Type Voltage Current (resistive
load)
min. max.
VAS..S,VCS..S
12–
250VAC,
50/60Hz
100mA 3A
VAS..G,VCS..G 12–30V
DC 2mA 0.1A
Switching frequency of proof of closure switch: max.
5x per minute.
Switching
current Switching cycles*
cosφ=1 cosφ=0.6
0.1 500,000 500,000
0.5 300,000 250,000
1 200,000 100,000
3 100,000 –
* Limited to max. 200,000 cycles for heating systems.
AIR FLOW RATE Q
Air flow rate Q for a pressure loss of Δp=1mbar
(0.4"WC):
∆p = 1 mbar (0,4 "WC)
1 x VAS
Air flow rate
Q [m3/h] Q [SCFH]
VAS110 4.4 155.4
VAS115 5.6 197.7
VAS120 8.4 296.6
VAS125 9.5 335.5
VAS225 16.7 589.7
VAS232 21 741.5
VAS240 23.2 819.2
VAS250 23.7 836.8
VAS340 33.6 1,186.4
VAS350 36.4 1285.3
VAS365 37.9 1338.2
Air flow rate Q for a pressure loss of Δp=10mbar
(4"WC):
∆p = 10 mbar (4 "WC)
1 x VBY/1 x VAS
Air flow rate
Q [m3/h] Q [SCFH]
Bypass valve VBY 0.85 30.01
Pilot gas valve
VBY 0.89 31.43
Bypass valve VAS1: Air flow rate
Ø [mm] Q [m3/h] Ø ["] Q [m3/h]
1 0.2 0.04 7.8
2 0.5 0.08 17.7
3 0.8 0.12 28.2
4 1.5 0.16 53.1
5 2.3 0.20 81.2
6 3.1 0.24 109.5
7 3.9 0.28 137.7
8 5.1 0.31 180.1
9 6.2 0.35 218.9
10 7.2 0.39 254.2
Pilot gas valve VAS1: Air flow rate
Ø [mm] Q [m3/h] Ø ["] Q [m3/h]
10 8.4 0.39 296.6

VAS1–3 · Edition 01.21
EN-15
DESIGNED LIFETIME
This information on the designed lifetime is based on
using the product in accordance with these operat-
ing instructions. Once the designed lifetime has been
reached, safety-relevant products must be replaced.
Designed lifetime (based on date of manufacture) in
accordance with EN13611, EN161 for VAS,VCS:
Type Designed lifetime
Switching
cycles Time (years)
VAS110 to
225 500,000 10
VAS232 to
365 200,000 10
VAS/VCS665
to 780 100,000 10
VAS/VCS8100
to 9125 50,000 10
You can find further explanations in the applicable
rules and regulations and on the afecor website (www.
afecor.org).
This procedure applies to heating systems. For ther-
moprocessing equipment, observe local regulations.
CERTIFICATION
Declaration of conformity
We, the manufacturer, hereby declare that the products
VAS/VCS1–3 with product ID No. CE-0063BO1580
comply with the requirements of the listed Directives
and Standards.
Directives:
– 2014/35/EU – LVD
– 2014/30/EU – EMC
– 2011/65/EU – RoHS II
– 2015/863/EU – RoHS III
Regulation:
– (EU) 2016/426 – GAR
Standards:
– EN161:2011+A3:2013
The relevant product corresponds to the tested type
sample.
The production is subject to the surveillance proce-
dure pursuant to Regulation (EU) 2016/426 AnnexIII
paragraph3.
Elster GmbH
Scan of the Declaration of conformity (D,GB)– see
www.docuthek.com
SIL, PL
Safety-specific characteristic values, see Safety
manual/Technical Information DG (D,GB,F)– www.
docuthek.com.
FM approved*
Factory Mutual (FM) Research Class: 7400 and 7411
Safety overpressure slam shut valves. Designed for
applications pursuant to NFPA85 and NFPA86.
ANSI/CSA approved*
Canadian Standards Association – ANSIZ21.21 and
CSA6.5
UL listed*
Underwriters Laboratories – UL429 “Electrically op-
erated valves”.
AGA approved*
AGA
Australian Gas Association
* Approval does not apply for 100VAC or 200VAC.
Eurasian Customs Union
The products VAS1–3 meet the technical specifications
of the Eurasian Customs Union.
REACH Regulation
The device contains substances of very high concern
which are listed in the Candidate List of the European
REACH Regulation No.1907/2006. See Reach list
HTS at www.docuthek.com.
China RoHS
Directive on the restriction of the use of hazardous sub-
stances (RoHS) in China. Scan of the Disclosure Table
China RoHS2, see certificates at www.docuthek.com.

VAS1–3 · Edition 01.21
EN-16
LOGISTICS
Transport
Protect the unit from external forces (blows, shocks,
vibration).
Transport temperature: see page 13 (Technical data).
Transport is subject to the ambient conditions de-
scribed.
Report any transport damage on the unit or packaging
without delay.
Check that the delivery is complete.
Storage
Storage temperature: see page 13 (Technical data).
Storage is subject to the ambient conditions described.
Storage time: 6months in the original packaging before
using for the first time. If stored for longer than this, the
overall service life will be reduced by the corresponding
amount of extra storage time.
DISPOSAL
Devices with electronic components:
WEEE Directive 2012/19/EU – Waste Electrical
and Electronic Equipment Directive
At the end of the product life (number of op-
erating cycles reached), dispose of the pack-
aging and product in a corresponding recycling
centre. Do not dispose of the unit with the usu-
al domestic refuse. Do not burn the product.
On request, old units may be returned carriage paid
to the manufacturer in accordance with the relevant
waste legislation requirements.
© 2021 Elster GmbH We reserve the right to make technical modifications in the interests of progress.
The Honeywell Thermal Solutions family of products includes
Honeywell Combustion Safety, Eclipse, Exothermics, Hauck,
Kromschröder and Maxon. To learn more about our products, visit
ThermalSolutions.honeywell.com or contact your Honeywell Sales
Engineer.
Elster GmbH
Strotheweg 1, D-49504 Lotte
T [phone]
[email protected]
www.kromschroeder.com
Global centralized service deployment coordination:
T [phone] or -555
[email protected]
Translation from the German
FOR MORE INFORMATION