BRAHMA EVN25 Series User manual

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EVN25*... EVN30*...
SOLENOID GAS VALVES WITH 3/4” AND
1” CONNECTIONS AND OPERATING
PRESSURE UP TO 500 mbar
GENERAL DESCRIPTION
This series of solenoid valves are of normally closed type,
suitable for civil and industrial applications, supplied with
alternate or direct current and inclusive of inside rectification
circuit which permitted to make actions as silent as possible;
a wire-net filter on the inlet avoids the entrance of dirt
of > 1 mm.
There is the possibility to have a fast opening or a slow
opening valve (obtained by special hydraulic shock-
absorber), with flow adjustment and fast opening initial flow
adjustment.
All versions can be supplied with gas pressure switch and
gas pressure test points upstream and downstream.
Gas valves of this series, conforming to EN161, have a CE
type Certificate (CE Reg. N° 63AQ0626) in accordance to
European Directives 90/396 and 93/68.
−EC- type certification in accordance with the new
European Gas Appliances Regulation (EU) 2016/426
(GAR);
−conformity to EC Low-voltage directive 2014/35/EU
TECHNICAL FEATURES
Class: A
Group: 2
Supply voltage (1): 230 Vac / 50-60 Hz
110 Vac / 50-60 Hz
Operating temperature: -10°C / +60°C
Closing time: ≤1s
Opening time: ≤1s (quick opening
versions only)
Connection: DIN 43650 plug
Protection degree: IP40 (with DIN plug)
Mounting: vertical and horizontal
Body: die-cast aluminium
Connection: UNI ISO 228/1 G3/4” e G1”
(1) Versions with different supply voltages are available.
DIRECTIONS FOR INSTALLATION AND MAINTENANCE
•This valve is a safety appliance and should not be
modified. The manufacturer's responsibility and guarantee
are invalidated in case the device is tampered with by the
user.
•The applicable national regulation and European
standards (Ex. EN 60335-1 and EN 60335-2-102) related
to the electrical safety must be respected;
•Assemble the valve to the installation so that the arrow
on the valve body has the same direction as the fuel flow.
•During the assembly of the valve to the installation
piping, avoid twisting on the sheath and always use an
hexagonal wrench to be fitted to the valve body.
•Make sure that no foreign matters have entered the
valve body.
•Make sure that the max. fuel input pressure never
exceeds the value appearing on the label.
•All operations (installation, maintenance, etc.) must be
carried out by a qualified technician.
•Before any connection operation, completely isolate the
system from power supply (multi-pole disconnection).
Place the system safely to avoid accidental switch-on and
make sure there is no voltage. If the system is not
switched off, there is a risk of electric shock.

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•During and after any operation (installation,
maintenance, etc.), make sure that the type and code are
the ones provided, check the correct functioning and the
internal and external thickness of the valve.
•In the event of a fall or impact, the valves must not be
started, as safety functions may be compromised even if
no damage is visible to the outside.
•Faulty valves or damaged must be unplugged from power
supply and cannot be used.
•The valve has a designed lifetime* based on the
endurance tests in the standard EN 161. A summary of
the conditions has been published by the European
Control Manufacturers Association (Afecor)
(www.afecor.org). The designed lifetime is based on use
of the valve according to the manufacturer’s technical
notes. After reaching the designed lifetime in terms of the
number of burner startup cycles, or the respective time of
usage, the valve has to be replaced by authorized
personnel.
* The designed lifetime is not the warranty time specified
in the Terms of Delivery.
DIRECTIONS FOR EVN25*L... AND EVN30*L... VALVES
ADJUSTMENT
Flow adjustment
To adjust the gas flow, you have to remove one of the two
screws used to fasten the lag group (the not enamelled one,
marked with 4 in Fig. 1) and rotate clockwise the whole group
to reduce the flow or in the opposite direction to increase it.
Opening time adjustment
After removing the top protection, by rotating it
counterclockwise, you have to act on the adjustment screw,
marked with 1 in Fig. 2; by rotating clockwise, the opening
time becomes longer, by rotating in the opposite direction, the
opening time becomes shorter.
Quick release initial flow adjustment
After removing the top protection by rotating it
counterclockwise, if you rotate clockwise the nut marked with
2 in Fig. 2, the initial release will be reduced; if you rotate the
same nut counterclockwise, the initial release will be
increased.
.
2 1
3
4
Fig. 1
DIRECTIONS FOR EVN25*SR... AND EVN30*SR...
VALVES ADJUSTMENT
Flow adjustment
After removing the top protection by rotating it
counterclockwise, rotate clockwise the screw marked with 1
in Fig. 2 to reduce the flow, rotate in the opposite direction to
increase the same.
1
Fig. 2

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OVERALL DIMENSIONS

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DIAGRAM
PRESSURE DROP
mbar
FLOW RATE
m
3
/h
A : Standard flow rate m
3
/h of NATURAL GAS relative density 0.554
B : Standard flow rate m
3
/h of LPG relative density 1.54
C : Standard flow rate m
3
/h of TOWN GAS relative density 0.411
D : Standard flow rate m
3
/h of AIR relative density 1

NOTES FOR PRODUCT DISPOSAL
The device contains electronic components and cannot therefore be disposed of as normal household waste. For the disposal
procedure, please refer to the local rules in force for special waste.
BRAHMA S.p.A.
Via del Pontiere, 31
37045 Legnago (VR) - ITALY
Tel. [phone] - Fax [phone]/18 Subject to amendments without notice
http://www.brahma.it
E-mail : [e-mail]
31092_r01 5/5
ATTENTION --> Company Brahma S.p.A. declines any responsibility for any damage resulting from Customer tampering with the device.
TYPE REFERENCES
N.B.: The simultaneous presence of gas pressure switch and test pressure point limits the choice of the position
SUMMARY TABLE
Type DN Operating pressure
(mbar)
Orifice
diameter
(mm) Connection Coil Consumption
230Vac Consumption 110Vac
Flow
(m³/h gas with
∆P2.5mbar)
EVN25∗S
EVN25*SR
EVN25*L DN20 0 ÷ 500 29 G3/4" BE10*G.. 25VA 25VA 18.5
EVN30∗S
EVN30*SR
EVN30*L DN25 0 ÷ 500 29 G1" BE10*G.. 33W 33W 21
EVNXX * S R P * X XX X P D V/Hz
Type
Type Description
EVN25
G3/4” inlet-outlet Ø29
orifice.
EVN30
G1” inlet-outlet Ø29
orifice.
Opening type (fast/slow)
Type Description
S
Fast opening valve.
L Slow opening valve (this
version is inclusive of flow
adjuster).
Flow adjustment
Valve fitted with equipment for flow
adjustment.
Test pressure point
Valve inclusive of test pressure point
with G1/4” connections.
Supply voltage
Type Description
110/50-60 110 Vac / 50-60 Hz
230/50-60 230 Vac / 50-60 Hz
Gas pressure switch position
Type Description
D
Right
S
Left
Gas pressure switch type
Type Description
P
Fixed setting
PR
adjustable setting
Test
pressure
point
position
Type Description
Outlet (solo sotto)
7
Inlet left
8
Inlet right
Winding type
Type Descrizione
C
Supply in direct current.
G
Supply in alternate
current, but valve
operates in direct current
thanks to an embodied
rectification bridge.
Connection
type
Type Description
FD Connection with
fast-on DIN