Elektrogas EVRM-NA Manual De Instrucciones página 4

SAFETY SOLENOID VALVE FOR GAS
EVRM-NA / EVRM-6NA
The EVRM-NA type valve is a manual reset safety valve that is normally open. A manual operation is therefore
necessary to open the valve and set the mechanism consenting to maintain this state.
The powering by means of line current and/or condenser discharge, induced by the leakage detector, causes tripping
of the mechanism and consequent closing of the gas passage. If energizing of the sensor persists due to the
presence of gas, the valve remains under power and does not allow reset. When the causes for locking have been
eliminated, the valve may be reopened by working it manually. This type of device, connected with one or more
leakage detectors or alarm signals for the presence of carbon monoxide, is suitable for performing locking operations
on the gas line.
1- INSTALLATION (Qualified technicians only and in compliance with the rules in force)
Shut off the gas supply and electrical power before servicing any part of the system.
Check correspondence of flow direction with arrow printed on valve body, check correct alignment of connecting
pipes. Avoid overtightening and use proper tools only. Valve may be mounted with coil in horizontal or vertical
position. Coil may be oriented 360 degrees in any direction. Install in an area that is protected from rain and water
splashes or drops.
2- ELECTRICAL CONNECTION (IEC 730-1)
Using a screwdriver remove the DIN plug from the coil and connect power cables to the clamps according to printed
designation. When reassemble use cable gland properly.
Perform leak and functional tests after mounting.
3- OPENING FUNCTION
To open the valve remove the plastic cap, pull the knob completely up to complete resetting. Put back the plastic cap.
The 6 bar type requires pressure compensation: pull the knob for the first step, wait some moment, and then pull the
knob completely up to full resetting (from 3/4" to 12").
4- CLEANING AND MAINTENANCE (Once per year)
Dust and any foreign bodies may be easily removed from the filter or the gas passage zone. After shutting off
upstream gas and electric current, reset the valve. Coil is removed by unscrewing the reset knob and the fastening
cap. Unscrew the screws fixing the counter flange to valve body. During this operation care should be taken not to
cause damage to the sealing lip.
Recommended service life: 10 years.
Do not dismount or tamper with the resetting mechanism.
5- 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.
6- TECHNICAL SPECIFICATIONS
Connections
Voltage rating
Voltage tolerance
Max. operating pressure
Closing time
Protection class (EN 60529)
Cable gland
Pressure inlets
Limit switch
Strainer
Gas type (EN 437)
ATEX INSTALLATION: Special conditions for safe use (X)
1) Ambient temperature -20°C/+40°C; 2) Low mechanical danger; 3) Clean with a mist cloth; 4) Do not disconnect
the plug when energized; 5) Ensure an external grounding of the valve housing.
Elektrogas reserves the right to update or make technical changes without prior notice.
: gas threaded ISO 7-1 from Rp3/8 to Rp2½
: flanged PN16 – ISO 7005 from DN40 to DN300
: 230VAC, 110VAC, 24V AC/DC, 12VDC
: -15% / +10%
: 600 mbar or 6 bar
: < 1 second
: IP 54, by request IP65
: PG 9 (cable Ø6/8)
: G1/4 on two sides (except brass models)
: by request from 3/4" to 12"
: 600 µm (except brass models)
: Air and non-aggressive gases 1, 2 and 3 (gaseous state only)
(special version for aggressive gases - *compatibility of gas contents and
valve materials to be checked before installation)
GB