Krom Schroder DG 17VC User manual

CONTENTS
· Edition 09.21 · EN · 03251614
DE, EN, FR, NL, IT, ES, DA, SV, NO, PT, EL, TR, CS, PL, RU, HU – www.docuthek.com
Solenoid valve for air VAA
Safety .................................1
Checking the usage ......................2
Installation ..............................2
Wiring .................................3
Setting the bypass .......................4
Commissioning ..........................5
Replacing the solenoid actuator .............6
Replacing the damping unit.................6
Replacing the circuit board .................6
Maintenance ............................7
Accessories............................. 7
Technical data ...........................7
Designed lifetime.........................9
Logistics ...............................9
Certification .............................9
Disposal ...............................9
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.
OPERATING INSTRUCTIONS

VAA · Edition 09.21
EN-2
CHECKING THE USAGE
The valVario solenoid valve for air VAA is used for the
staged control of industrial burners in cold air oper-
ating mode.
This function is only guaranteed when used within the
specified limits– see page 7 (Technical data). Any
other use is considered as non-compliant.
Type code
VAA Solenoid valve for air
1-3 Sizes
–Without flange
15–65 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
/R Slow opening, slow 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
2
8
6
9
4
1
7
5
3
1 Solenoid actuator
2 Flow body
3 Connection box
4 Connection flange
5 Position switch
6 Damping unit
7 Connection parts
8 Sealing plug
9 Variable bypass
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.
– Solenoid valves with position switch VAA..S or
VAA..G: actuator cannot be rotated.
➔ Install the unit in the pipe free of mechanical stress.
➔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.
➔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 25cm (9.8") above the black solenoid actuator.

VAA · Edition 09.21
EN-3
➔ The inlet pressure puand the outlet pres-
surepdcan be measured using the pressure
test points on both sides, see accessories.
pd
pu
➔ The seals in some gas compression fittings
are approved for temperatures of up to 70°C
(158°F). This temperature limit will not be ex-
ceeded if the flow through the pipe is at least
1 m3/h (35.31 SCFH) of gas and the maxi-
mum 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.
VAA with flanges
a b c
VAA without flanges
a b c
➔O-ring (Fig. c) must be fitted.
d e
➔Note the recommended tightening torques for the
connection parts! See page 7 (Technical data)
f g
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.
➔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
(-)

VAA · Edition 09.21
EN-4
Plug
➔LV1(+) = black, N(–) = blue
a b
(+)
LV1 N
(-)
Socket
➔1 = N(–), 2 = LV1(+)
a b c
d e
21
Position switch
➔
VAA open: contacts 1and2closed,
VAA closed: contacts 1and 3closed.
➔
Indicator of position switch: red = VAA open, white
= VAA closed.
CAUTION
Please observe the following to ensure smooth
operation:
– Route valve and position switch cables
separately through M20 cable glands or use two
separate plugs. Otherwise, there is a risk of
interference between valve voltage and position
switch voltage.
➔To make wiring easier, the connection terminal for
the position switch can be removed.
1 32
LV1
(+)
N
(-)
1
COM
2
Valve open
Valve closed
3
1 32
LV1
(+)
N
(-)
1
COM
2
Valve open
Valve closed
3
➔When installing two plugs on VAA a with position
switch: label the sockets and plugs to avoid con-
fusion.
21
3
21
1
COM
2
Valve open
Valve closed
3
➔ Ensure that the connection terminal for the position
switch has been reconnected.
Finishing the wiring
5
SETTING THE BYPASS
The system can be operated at burner low-fire rate or
purge air using a variable bypass.
The flow rate is adjusted individually using the scale
on the bypass.
➔ The bypass is set to the closed position (0°) at
the factory.
➔We recommend to note the set opening angle on
the type label.

VAA · Edition 09.21
EN-5
Bypass flow rate
10
0,3 0,5 1,5 3 4 5 7
50
30
70
100
150
200
1 2 10 20 300,2
0°
30° 40° 50° 60° 70° 80°
90°
20°
10°
4
11,9 18,7 187
19,7
11,8
27,6
39,4
59,1
78,7
37,3 74,7 373 747 11207,5
Q [m3/h (n)]
Q [SCFH]
pu[mbar]
pu[inch WC]
The characteristic flow rate curves have been meas-
ured with the valve closed.
The setting for the opening angle in the bypass de-
pends on the supply pressure and air requirement.
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
0U
-+
min.
max.
➔The VAA remains tight even if the adjusting screw
is overturned.
Setting the start rate on the VAA../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.

VAA · Edition 09.21
EN-6
Setting the damping speed on the VAA../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 SOLENOID ACTU-
ATOR
See operating instructions enclosed with spare part
or see www.docuthek.com.
A web app for selecting the correct spare part is avail-
able at www.adlatus.org.
REPLACING THE DAMPING UNIT
Slow opening/quick closing
1 Disconnect the system from the electrical power
supply.
2 Shut off the air supply.
➔Loosen the M3 setscrews (1.5mm hexagon sock-
et), but do not unscrew completely.
3
M3
4 5
6
M3
7 Set the start gas rate, see page 5 (Setting the
start rate on the VAA../L).
Slow opening/slow closing
1 Shut off the air supply.
➔The solenoid actuator remains switched on.
➔Loosen the M3 setscrews (1.5mm hexagon sock-
et), but do not unscrew completely.
2
M3
3 4
5 Switch off the solenoid actuator. Otherwise, the
solenoid actuator will heat up unnecessarily.
6
M5
7
1.
2.
8
9 10 11
2.
1.
12
M5
M5
13 Switch on the solenoid actuator so that the guide
pin becomes visible.
14
15 Switch off the solenoid actuator. The damping unit
is lowered.
16 17
M3
18
Open the air supply and switch on the power supply.
REPLACING THE CIRCUIT BOARD
See operating instructions enclosed with spare part
or see www.docuthek.com.
A web app for selecting the correct spare part is avail-
able at www.adlatus.org.

VAA · Edition 09.21
EN-7
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 (Wiring).
ACCESSORIES
Pressure switch for gas DG..VC
The pressure switch for gas monitors the inlet pres-
surepuand 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 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%.
Variable bypass VAA /B
For retrofitting on the VAA, the bypass can be supplied
as an additional item.
Order No.: 74926325
1 Shut off the air supply.
➔ Use the enclosed self-tapping screws and O-rings
for installation.
2 3 4
5 6
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.

VAA · Edition 09.21
EN-8
Mechanical data
Gas types: clean air. The air must be clean and dry
in all temperature conditions and must not contain
condensate.
Medium temperature = ambient temperature.
CE approved, max. inlet pressurepu: 500mbar
(7.25psig).
Flow adjustment limits the maximum flow rate to be-
tween approx. 20 and 100%.
Adjustment of the start rate: 0 to approx. 70%.
Opening times:
VAA../N quick opening: ≤ 1s;
VAA../L slow opening: up to 10s,
VAA../R slow opening: 4s.
Closing time:
VAA../N, VAA../L quick closing: <1s,
VAA../R slow closing: 4s.
Switching frequency: VAA../N: max. 30x per minute.
VAA../L, VAA../R: there must be a period of 20sec-
onds between switching off and on again so that the
damping is fully effective.
Valve housing: aluminium,
valve seal: EPDM.
Connection flanges:
up to size3: Rp internal thread to ISO7-1, NPT to
ANSI/ASME;
size2 and higher: with PN16 ISOflange (pursuant
to ISO7005) .
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.
Recommended tightening torques for the connec-
tion parts:
Connection parts
Tightening
torque
[Ncm]
VAx 1: M5 500 ± 50
VAx 2: M6 800 ± 50
VAx 3: M8 1400 ± 100
Electrical data
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
VAA1 24V DC 25 W
VAA1 100VAC 25 W (26 VA)
VAA1 120VAC 25 W (26 VA)
VAA1 200VAC 25 W (26 VA)
VAA1 230VAC 25 W (26 VA)
VAA2,
VAA3 24V DC 36 W
VAA2,
VAA3 100VAC 36 W (40 VA)
VAA2,
VAA3 120VAC 40 W (44 VA)
VAA2,
VAA3 200VAC 40 W (44 VA)
VAA2,
VAA3 230VAC 40 W (44 VA)
Contact rating of position switch:
Type Voltage Current (resistive
load)
min. max.
VAA..S
12–
250VAC,
50/60Hz
100mA 3A
VAA..G 12–
30VDC 2mA 0.1A
Switching frequency of position 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.

VAA · Edition 09.21
EN-9
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 VAA:
Type Designed lifetime
Switching
cycles Time (years)
VAA 115 to
225 500,000 10
VAA 232 to
365 200,000 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.
LOGISTICS
Transport
Protect the unit from external forces (blows, shocks,
vibration).
Transport temperature: see page 7 (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 7 (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.
CERTIFICATION
Declaration of conformity
We, the manufacturer, hereby declare that the prod-
ucts VAA 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
Standards:
– based on EN161
Elster GmbH
Scan of the Declaration of conformity (D,GB)– see
www.docuthek.com
Eurasian Customs Union
The product VAA meets 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.
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.

VAA · Edition 09.21
EN-10
© 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