Nortec MH User Manual

MH

TM

Series

CONTROL UNIT
Inst allation Manual

2544831-A

PROPRIETARY NOTICE

This document and the information disclosed herein are proprietary data of
WALTER MEIER LTD. Neither this document nor the information contained herein
shall be reproduced used, or disclosed to others without the written authorization of
WALTER MEIER LTD., except to the exte nt required for installation or maintenance
of recipient’s equipment. All references to the NORTEC name should be taken as
referring to WALTER MEIER LTD.

LIABILITY NOTICE

WALTER MEIER LTD. does not accept any liability for installations of humidity equipment installed
by unqualified personnel or the use of parts/components/equipment that are not authorized or
approved by WALTER MEIER LTD.

COPYRIGHT NOTICE

Copyright 2008, WALTER MEIER LTD. All rights reserved.

RECORD OF REVISIONS

For each revision, put the revised pages in your manual and disca rd the superseded pages. W rite the
revision number and revision date, date put in manual, and the incorporator’s initials in the applicable
columns on the Record of Revisions.

Revision

Number

Revision

Date

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In Manual By

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TABLE OF CONTENTS

Subject Page

10-00 INTRODUCTION

1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.1 NOTES ON THE OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.2 SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2. OPERATING THE MH CONTROL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.1 FUNCTION OF THE DISPLAY AND OPERATING ELEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.2 SWITCHING THE CONTROL UNIT ON AND OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.3 REMOTE OPERATING AND FAULT INDICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.4 OVERVIEW AND OPERATING OF THE MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

3. EXPLANATION OF CONFIGURATION SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.1 EXPLANATION OF THE STATUS INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.2 EXPLANATION OF UNIT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

3.3 EXPLANATION OF ERROR HISTORY LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

10-10 CONFIGURATION

1. CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.1 UNIT SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

1.2 MODBUS SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

10-20 OPERATIONAL FUNCATIONS

1. OPERATIONAL FUNCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

1.1 CARRYING OUT MANUAL DRAINING / PIPE FLUSHING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

1.2 RESETTING THE MAINTENANCE INDICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

1.3 RESETTING THE HOURS METER OF THE UV LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

10-30 TROUBLESHOOTING

1. FAULT INDICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

1.1 FAULT INDICATION 28

1.2 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

1.3 RESETTING THE ERROR INDICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

WARRANTY

THIS PAGE INTENTIONALLY LEFT BLANK

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INTRODUCTION

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1. INTRODUCTION

1.1 NOTES ON THE OPERATING INSTRUCTIONS
Limitation

These operating instructions are an addendum to the installation and operating
instructions for the Nortec MH and describe the operating of the MH control unit, which
is used with the models Nortec MHTC Flow, MHB Reflow, MHTC Reflow. These
operating instructions are meant for well trained personnel being sufficiently qualified.

Safekeeping

Please safeguard these operating instructions in a safe place, where they can be
immediately accessed. If the equipment changes hands, the documentation must be
passed on to the new operator.

If the documentation gets lost, please contact your local Nortec representative.

Copyright protection

The present operating instructions are protected under the Copyright Act. Passing-on
and reproduction of the manual (or part thereof) as well as exploitation and
communication of the contents are prohibited without written permission by the
manufacturer. Violation of copyright terms is subject to legal prosecution and arises
liability for indemnification. The manufacturer reserves the right to fully exploit
commercial patent rights.

1.2 SAFETY

Every person operating the MH control unit must have read and understood the
operating instructions of the MH control unit as well as the installation and operating
instructions of the Nortec MH (specially the safety instructions).

Knowing and understanding the contents of the operating instructions of the MH
control unit and the installation and operating instructions of the Nortec MH is a basic
requirement for protecting the personnel against any kind of danger, to prevent faulty
operation, and to operate the unit safely and correctly.

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2. OPERATING THE MH CONTROL UNIT

2.1 FUNCTION OF THE DISPLAY AND OPERATI NG ELEMENTS

Figure 1. Display

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2.2 SWITCHING THE CONTROL UNIT ON AND OFF

NOTE: For putting the unit into operation and taking the unit out of operation please
follow the procedures described in the installation and operating instructions for the
Nortec MH.

Switching the MH control unit on

The control carries out a system test, during which all the
LEDs light up and the opposite display is shown. If a failure
occurs on the system test, a corresponding error message is
shown in the display.

After the system test the control is in normal operation mode.
The display shows the standard operating display. Note: The
contents of the standard operating display depends on the
type (MHTC Flow, MHTC Reflow), the actual operating

Switching the MH control unit off

The display goes out. On models MHB Reflow and MHTC Reflow the drain valve
opens and the water tub empties.

Note: The different hygiene functions (regular draining, flushing of the supply line, etc.)
remain active also in times without humidification / cooling demand, the control unit
should only be switched off for maintenance or, troubleshooting, or to disable
completely operation (as in seasonal shutdown).

status and on the configuration of the Nortec MH and can
differ from the opposite display.

2.3 REMOTE OPERATING AND FAULT INDICATION

If your control is equipped with a remote indication board (accessory) the following
operating status are shown remotely:

Activated remote
indication relay
H1 “Error”

H2 “Service”

H3 “Humidification”
H4 “Unit on”

When? Display on Unit

A fault is present, further
operation is not possible

Maintenance or UV lamp
(option) replacement is
due. The unit remains
operational for a certain
time
Unit is humidifying Green LED lights
Unit ready for operation Unit switch lights

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Red LED lights. An error
message is shown in the
display
Yellow LED lights. The
service warning message
is shown in the display

2.4 OVERVIEW AND OPERATING OF THE MENU

The operating and display is operated via the four
keys located just below the display. The four status
fields at the bottom of the display show the current
function of the keys.

Keys

Figure 2. Menu Overview

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3. EXPLANATION OF CONFIGURATION SETTINGS

3.1 EXPLANATION OF THE STATUS INFORMATION (INDICATION STATUS)

In normal operation mode the control unit is in the status level. The status level forms a loop
that includes several pages holding operating information which can be accessed with the
arrow keys. The various displays of the status level are shown below.

Standard operating display

The appearance of the standard operating display depends on the actual operating status and
the configuration of the Nortec MH

Standard operating display with external control via the
external controller.
Standby (no humidity demand) or Demand % (humidity
demand present).

Info Page: Settings

Info Page: Performance data

Info Page: Operating hours

Standard operating display with internal control.

- Actual humidity in %rh.

- Configured humidity setpoint in %rh.

- Software version.

- Selected control signal source.

- Configured control signal range.

- Configured Modbus address of the unit.

- Configure power limitation in % of the maximum output.

- Actual output unit A in kg/h.

- Actual total output in kg/h (the same as Capacity A unless a

second module is connected to control unit).

.

- Total operating hours of the Nortec MH.

- Remaining operating hours to the next maintenance.

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Info Page: Clean Trg. 1

This page shows the current settings for the time based and externally activated
forced draining/box cleaning (MHTC Reflow) or the box cleaning (MHTC Flow),
respectively.

Note: Wash = draining with simultaneous box cleaning (MHTC Reflow) or box
cleaning only (MHTC Flow), Drain = draining only.

– Time controlled draining/box cleaning (Timer).
– Actual time of day.
– Point in time of the next draining/cleaning cycle.
– Configured cleaning mode.

– Interval controlled draining/box cleaning (Periodic).
– Configured interval time in hours.
– Remaining time in hours up to the next
draining/cleaning cycle.
– Configured cleaning mode.
– Externally controlled draining/box cleaning
(Demand).
– Actual status of the draining/cleaning demand.
– Configured cleaning mode.

– Clean Trg. 1 deactivated (can appear only with
module MHTC Flow).

Info Page: Clean Trg. 2 (Note: This page is not shown with model MHTC Flow)

– Fill cycle controlled draining (Cycle).
– Number of fill cycles between cleaning/draining
cycles.
– Remaining fill cycles up to the next draining.
– Cleaning mode (Wash= Draining with simultaneous
box cleaning or box cleaning only, Drain= draining
only).
– Conductivity controlled draining/cleaning (µSensor) -­>Option.
– Set conductivity limit value inn µS/cm.
– Actual conductivity value of the water in the tub in
µS/cm.
– Configured cleaning mode.
– Operation-dependent draining deactivated (Off).

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Info Page: Box drying

This page shows the settings for box drying.

– Time controlled box drying (Timer)
– Actual time of day
– Point in time of the next drying cycle

– Interval controlled box drying (Periodic)
– Configured interval time in hours
– Remaining time in hours up to the next drying cycle

Info Page: Supply line flushing function/water quantity reduction function

– Indicates if the supply line flushing function.
– Indicates if the "Softstart" water conservation function
is enabled.

Info Page: UV Module (option)

Indicates if the UV water treatment option is enabled
(Note: UV treatment requires optional components be
installed).

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