Nortec MLP RO pump station - Manual (Page 4)

TI071GB-02 /06.11.09/LJ 4/12
Safety equipment
Pressure switch
The control is equipped with a locking device from the pressure switch placed on the inlet
side of the RO pump, ensuring that the pump stops if the water pressure disappears.
If the water pressure falls under shift pressure of the pressure switch, the display will
show alarm text. Restart is done by pressing “Alarm reset”.
Max hygrostat to secure against over-humidification
If the humidity rises to a value higher than the one adjusted on the max-hygrostat, the
system is stopped and the alarm lamp will light. The display shows in which section the
max-hygrostat is released.
The system has two possibilities for switching on after error (chosen in the F6 area).
If automatic switch on is chosen:
If the system, before switching off, has run for minimum one hour (adjustable) without
any MaxHygrostat error, it will be switched on automatically when the humidity is under
the set value again. If a new error appears before one hour has passed (adjustable) it will
not be switched on, but has to be switched on manually by pressing “Alarm reset”.
If manual switch on is chosen:
The system only restarts after acknowledge by pressing “Alarm reset”.
Thermostat
For protection of the high pressure pump the control is provided with a multi-stage
measurement of temperature.
Phase sequence relay
The control is equipped with a phase sequence relay securing against wrong connection of
the power cable. Both light-emitting diodes on relay E1, which is placed in the cabinet on
the right, must light.
In case of light in both diodes, the pumps will operate in the right direction. The relay also
secures against safety break.