ZEV. Class A solenoid valves are suitable for gas and air blocking and adjusting controls and regulation in gas power burners, atmospheric gas boilers, industrial ovens and other gas consuming appliances.
Connection
Gas thread ISO7/1 1”
Flanged ISO7005-PIN 16 DN65 to DN 150
Ambient temperature
-15C to 60C
Supply voltage
230 Vac (+10% -15%)
24Vac
Maximum operating pressure
ZEV/R/S 15-80 360mbar
Protection class
IP54 without CPI switch
Opening and closing time
ZEV/R less than 1 second
ZEV/S slow 1 to 30 seconds
Maximum working cycles
ZEV/R 20 cycles per minute
ZEV/S 1 cycle per minute
Capacity in m3/hr at dp=2.5mbar
DN 25 16.7m3/hr
Allow enough space from the walls / ground to provide adequate access and free air circulation to cool the coil
The gas valve can be mounted vertically or horizontally but the coil head must NOT be below the valve body
Electrical Connections
Turn off the power before making electrical connections or servicing any part of the system.
Ensure the wiring is in accordance with local regulations
Use wire which can withstand 105C ambient temperature
Ensure the electrical on/off switch is provided with a terminal block for electrical connections
Follow the instructions supplied by the appliance manufacturer
Coil features Coil suitable permanent energisation.
The continuous service causes inevitable coil heating, depending on working environment the coil surface will be very hot.
This situation is absolutely normal.
To improve the coil cooling, install the valve allowing free air circulation
Caution
To ensure a safe closing of the valve, it is essential that voltage over the terminals of operators is reduced to 0 volts
Turn off the gas supply before starting installation
Disconnect power supply to prevent electric shock and / or equipment damage
Take care that dirt cannot enter the gas valve during handling
Check correspondence of flow direction with the arrow on the body of the gas valve
We recommend installing a filter upstream of each installation (less than 1mm)
ZEV/R Flow rate regulation
ZEV/S Flow rate and opening speed
The coil can only be powered when attached to the valve.
Power must be disconnected if the coil is removed from the valve.
Failure to disconnect the power will result in the coil burning out.
Never energise the coil if not fitted to the valve otherwise it will shorten the coil life and eventually result in the coil burning out.
The coil should be tightly fitted to the valve.
Loose fitting will shorten the life of the coil.
Surges/ Spokes should be prevented from reaching the coil as these will result in them burning out
Power supply must be within tolerance indicated otherwise capacitor burnout will occur.
The continuous service (100% ED) causes inevitable coil heating, depending on working environment the coil surface will be very hot, this situation is absolutely normal
If dire ingress causes handle or manual reset valve to jam we recommend the use of lubricating oil on the spindle.
Leave for a couple of minutes to allow penetration and then manoeuvre handle up and down several times.
The coil should then operate normal