Nortec MLP RO User Manual

Control of the system, MLP RO pump station

Operating instructions

TI071GB-02 /06.11.09/LJ 1/12

Table of contents

Humidification pump

Safety equipment

Selecting RO type

Choice of language

Normal indications

Alarm indications

Further indications

In the F1 area - Humidity

In the F2 area - Hour meters

In the F3 range - Indication of RO-status

Change of values

F5-F6-F7

3

4

5

5

7

7

8

8

8

8

9

9

In the F5 range - Scaling of sensors

In the F6 range - Common parameters

In the F7 range - Setting parameters for the humidity regulators

Reset to standard values

9

10

11

12

TI071GB-02 /06.11.09/LJ 2/12

Humidification pump

The pump is driven by a three-phase motor powered by magnet controlled protective motor
switches. The control consists of a PLC-control system regulating the area humidity. The
regulation takes place by means of PI regulators to ensure a precise regulation of the area
humidity.

The PLC program is built up in such a way that you on the first start-up choose the number of
active sections. If e.g. three sections are chosen, section 4 is disconnected in safety circuits
and on display. On extensions, this choice can be repeated by using password 196.

In the control six hour meters are built in. One hour meter to indicate the operation time of
the pump to be used when determining the service intervals, one hour meter for the RO pump
and one hour meter for each of the four sections summarizing the humidification time.

TI071GB-02 /06.11.09/LJ 3/12

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.

TI071GB-02 /06.11.09/LJ 4/12