The Pump Units are designed for location in Zone 1 Hazardous areas, ATEX Category 2.
Electrical connections must be in accordance with Local Regulations for installation in Hazardous Areas.
It is recommended that a Lockable Isolator is positioned in close proximity to the pump, as a convenient local
Start / Stop facility.
A pressure relief valve is connected to the outlet manifold port and set to relieve the fluid pressure in the event of
the system overpressure.
If operated the pump must be turned off and fluid pressure relieved below 8 Bar, before restarting and the fault
rectified.
This is necessary to protect the Pump mechanics from overload.
An adapter to mount a pressure switch and pressure sensor is available, see accessories.
It is recommended that the switch setting is set to 1 bar [14.5 psi] above the maximum required pressure.
The maximum pressure setting the Pressure Switch should be set to is 20 bar [305 psi] and 17 bar [246 psi]
respectively.
The Pressure Switch is classified as simple apparatus and as such should be electrically connected as part of an
intrinsically safe electrical circuit.
The Pressure Switch should be wired as a Normally Closed contact (fail safe) and be hard wired to stop the motor
on operation, to minimise response time.
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