Contronics EP DM4 User manual

Ultrasonic
humidifier
EN - Original instructions
EP DM4
EP DM8
EP DM12

Preface
45% of all beautiful crops that grow on our fields ends up wasted. This not only puts a heavy
burden on our environment, but is also unacceptable in a world with a growing population and
so many mouths to feed.
Dry Misting is a technology that spreads tiny drops of water in the air, creating a thin layer of
mist. As the mist evaporates, the humidity rises and the temperature drops naturally. When
applied on fresh products, Dry Misting results in retaining freshness, colour and nutrients.
Extending the shelf life of these products up to twice as long and hereby reducing food waste.
At Contronics, we are on a mission is to reduce food waste by applying Dry Misting throughout
the entire fresh food supply chain.
Thank you for your purchase and joining us on this mission!
Copyright disclaimer
Copyright © Contronics Engineering B.V. All rights reserved. No part of this publication may be
reproduced or transmitted in any form or by any means without the prior written permission of
Contronics. The information in this publication is proprietary to Contronics.
Liability disclaimer
Contronics Engineering B.V. does not accept any liability due to incorrect installation,
maintenance or operation of the equipment described in this manual, or due to the use of
components that are not authorised by Contronics.

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Instruction manual
Table of Contents
1.About this document 4
1.1.Intended readers 4
1.2.Language 4
1.3.Symbols used in this manual 4
1.4.Terminology 5
1.5.Product variations 5
1.6.Warranty 5
1.7.Contact information 6
2.About the product 6
2.1.Intended use 6
2.2.Description 7
2.3.Main components 7
2.4.Display & controls 8
2.5.Ozone generator 9
2.6.Dimensions 9
2.7.Label & specifications 10
2.8.Optional components 11
2.9.Conformity 13
3.Safety 13
3.1.Safety precautions 13
3.2.Personal protection 14
3.3.Qualification of personnel 14
3.4.Safety instructions 14
4.Transport & storage 17
4.1.Packaging 17
4.2.Storage 17
4.3.Transport 17
5.Installation 18
5.1.Safety 18
5.2.Removing and inspecting the
packaging 18
5.3.Placing the humidifier 18
5.4.Water connections 20
5.5.Electrical connections 22
5.6.Connecting the air distribution
system 23
6.Commissioning 24
6.1.Safety 24
6.2.Installation checklists 24
6.3.Performing a functional test 26
7.Operation 27
7.1.Safety 27
7.2.Using the display 27
7.3.Performing a flushing cycle 32
7.4.Programming the ozone generator 33
8.Troubleshooting 35
8.1.Performance issues 35
8.2.Display messages 35
8.3.Overheating 37
9.Maintenance 38
9.1.Safety 38
9.2.Regular maintenance 38
9.3.Replacing the transducers 39
9.4.Cleaning or replacing the air filters 40
9.5.Exploded view & replacement parts 41
10.Decommissioning & disposal 42
10.1.Decommissioning the humidifier 42
10.2.Disposing of the humidifier 42

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1.About this document
This instruction manual contains the information necessary to properly and safely install,
operate, commission and maintain your humidifier.
Store this manual in or near the humidifier for future reference.
1.1.Intended readers
This instruction manual is intended for the following readers:
• The owner of the humidifier.
• The technician that performs the installation, commissioning and/or maintenance of
the humidifier.
• The operator of the humidifier.
Make sure you have fully read and understood the contents of this manual before
installing, operating or performing maintenance on the humidifier.
1.2.Language
This instruction manual is originally written in English (GB) and has been translated to:
• Dutch (NL)
• French (FR)
• German (DE)
1.3.Symbols used in this manual
The following symbols are used throughout this manual to highlight important
information:
Symbol Definition
6WARNING Indicates a hazardous situation that, if not prevented, could result
in death or serious injury or serious damage to the product or the
environment.
6CAUTION Indicates a hazardous situation that, if not prevented, could result
in moderate or minor injury or minor damage to the product or the
environment.
NOTICE Indicates useful information that is not related to hazardous
situations.
Indicates a reference to another paragraph within this document.

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Instruction manual
Symbol Definition
Indicates a reference to tools or materials that are not provided along
with the humidifier.
Indicates a reference to an OEM manual or another external
document.
1.4.Terminology
The following terms are used throughout this manual:
Term Definition
Transducers Components that convert an electrical signal to mechanical
vibrations. Located on the bottom of the water reservoir.
Mist The humidified air that is created by the humidifier.
Mist
distribution
system
The network of pipes through which the mist is transported to the
area that needs to be humidified.
RO water Demineralised water that has been filtered via reverse osmosis.
1.5.Product variations
This manual applies to the following humidifiers:
• EP DM4
• EP DM8
• EP DM12
All models have identical functionality. The models also vary in capacity, amount of air
outlets and length.
NOTICE
The illustrations in this manual show the EP DM4, unless stated otherwise.
1.6.Warranty
A warranty period of one (1) year applies to this humidifier. The general terms and
conditions of Contronics apply to this warranty.
The general terms and conditions of Contronics can be found in the
appendix of this document.

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1.7.Contact information
For more information about your humidifier or this document, please contact:
Contronics B.V.
Tel: [phone]
Mail: [e-mail]
Ambachtsweg 8
5492 NJ, Sint-Oedenrode
The Netherlands
2.About the product
This chapter provides all the information necessary to understand the humidifier.
2.1.Intended use
The humidifier is intended to be used to generate and distribute humidified air with the
goal of preserving fresh produce.
2.1.1.Unintended use
The humidifier is not intended for use in healthcare premises or other locations where
the occupants or materials are adversely sensitive to airborne bacteria, viruses, dust, and
debris.
The humidifier is not intended to be supplied with any other liquids other than water.
The humidifier is not intended for outdoor use.
NOTICE
Contronics does not accept liability for injury, product damage or reduced performance
due to unintended use of the humidifier.
2.1.2.Other applications
The humidifier may be applied in other situations than described in this document.
Various information sheets and drawings about other applications can be
downloaded from www.contronics.nl.

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Instruction manual
2.2.Description
The function of the humidifier is to generate and transport humidified air. This is done as
follows:
1.Water is transported into an internal water reservoir. Excess water is discharged.
2.Air is sucked into the humidifier by a fan. The air passes through a filter to remove
any pollution.
3.High-frequency vibrations (1.7 MHz) are generated by transducers at the bottom of
the water reservoir.
4.Water droplets (1 – 3 µ) are ejected above the water surface.
5.Water droplets mix with the air.
6.Humidified air is transported out of the humidifier into the connected distribution
system.
2.3.Main components
The humidifier consists of the following main components:
A
G
I
J
K
L
M
H
E
B
D
C
F
A.Display & controls
B.Air outlet for internal cooling
C.Label
D.Water drain connection
E.Water supply connection
F.Water supply and drain covers
G.Mist outlets
H.Air inlets & filters
I.External control interface
J.Power cable socket (C13)
K.Power cable
L.Water supply connection piece
M.Water drain connection piece
A detailed parts list of the humidifier can be found in §9.5..

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2.4.Display & controls
The humidifier is controlled through a display, located on the front panel of the
humidifier. The display allows you to:
• Monitor the performance.
• Change the performance settings.
• Receive error messages.
The display consists of the following components:
A
B
C
A.LCD display
B.Feedback LEDs
• Green
• Blue
• Red
C.Buttons
• Home
• Down
• Up
• Confirm
For instructions on how to use the display, see §7.2..
The feedback LEDs communicate information about the status of the humidifier:
Colour Status Meaning
On Flushing cycle is active.
Blinking Water reservoir is being filled.
Off Water reservoir is full.
On Mist is being produced.
The intensity of the LED indicates the set capacity of the
humidifier:
• Weak = Low capacity.
• Strong = High capacity.
Blinking Ozone is being produced.
Off No mist or ozone is being produced.
On Error has occurred and is shown on the display.
Blinking Warning is shown on the display.
Off No errors or warnings are shown.

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2.5.Ozone generator
The humidifier is equipped with an ozone generator. This component generates volatile
ozone (O3) gas that kills pathogens. The ozone is transported through the humidifier and
distribution system to disinfect every component.
NOTICE
The amount of ozone generator modules varies per model:
• The EP DM4 has 1.
• The EP DM8 has 2.
• The EP DM12 has 3.
For instructions on how to program the ozone generator, see §7.4..
2.6.Dimensions
I
AD
B
C
G
H
H
E F

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Model A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) H (mm)
EP DM4 213 320 273 224.4 136.5 95 45.1 56
EP DM8 213 440 273 224.4 136.5 95 45.1 56
EP
DM12
213 560 273 224.4 136.5 95 45.1 56
2.7.Label & specifications
Important specifications of the humidifier can be found on the label:
The label is located on the front panel, below the display (see §2.3.).
2.7.1.Physical specifications
The physical specifications of the humidifier are shown in the following table:
Model Unit EP DM4 EP DM8 EP DM12
Weight kg 10.2 13.6 17.1
Water reservoir volume L 0.7 1.4 2
Water supply connection
(outer diameter)
inch ¾ (BSP Male thread)
Water drain connection
(inner diameter)
inch ½ (Quick connection)
2.7.2.Performance specifications
The performance specifications of the humidifier are shown in the following table:
Model Unit EP DM4 EP DM8 EP DM12
Capacity kg/h +/- 3.3 +/- 6.6 +/- 9.9
Air flow m3/h 0 - 50 0 - 100 0 - 150
Supply voltage VAC
@Hz
110 - 240 @ 50 / 60 110 - 240 @ 50 / 60 110 - 240 @ 50 / 60
Power
consumption
W 210 400 600

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Instruction manual
Model Unit EP DM4 EP DM8 EP DM12
Fuse AT 3.15 6.3 8.0
Water supply
pressure
Bar 0.2 - 6 0.2 - 6 0.2 - 6
Water supply
temperature
oC 1 - 25 1 - 25 1 - 25
Ambient
temperature
oC 0 - 40 0 - 40 0 - 40
2.7.3.Service life
The transducers are the critical components that determine the service life of the
humidifier. The expected service life of the transducers is 10,000 hours.
NOTICE
• Follow the instructions in this manual to maximise the service life of the transducers
and the humidifier.
• If the transducers have reached the end of the service life, contact Contronics to
replace these components.
2.8.Optional components
The following components of the humidifier can be included in the delivery upon
request.
2.8.1.Coupling pieces
Various coupling pieces can be connected to one or more air outlets of the humidifier.
These coupling pieces determine the air flow for each part of the distribution system.
The following coupling pieces are available:
Image Orientation Air inlets Air outlets Outlet Ø Part number
Vertical 2 1 50 mm MP DM-
CON1X50V
Horizontal 2 2 50 mm MP DM-
CON1X50H

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Image Orientation Air inlets Air outlets Outlet Ø Part number
Vertical 4 3 50 mm MP DM-
CON3X50V
Horizontal 4 1 80 mm MP DM-
CON1X80H
Vertical 4 1 80 mm MP DM-
CON1X80V
2.8.2.Water filter unit
When a tap water supply is used, a RO water system must be installed between the
water supply and the humidifier.
NOTICE
Reverse osmosis (RO) water filtration systems can be supplied by Contronics.
2.8.3.External control interface
An external controller or humidity sensor can be connect to the front panel of the
humidifier (see §2.3.).
NOTICE
For more information about the options of the external control interface, please contact
Contronics.

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Instruction manual
2.9.Conformity
This humidifier carries the CE mark of conformity to the following directives:
• EMC directive: 2014/30/EU
• Low voltage directive: 2014/35/EU
• RoHs directive: 2011/65/EU
• WEEE directive: 2012/19/EU
The full declaration of conformity is available upon request. Please contact
Contronics (see §1.7.).
3.Safety
This chapter provides all the information necessary to safely interact with the humidifier.
3.1.Safety precautions
The following safety precautions are incorporated into the design of the humidifier to
prevent dangerous situations:
• Low water level shut-off system
The transducers will overheat if they vibrate when there is no water in the reservoir.
A float switch in the water reservoir is activated when the water level drops below the
minimum height. The transducers are deactivated and an error message is shown on
the display.
• Overflow protection
Overflow of the water reservoir may cause damage to the internal components of the
humidifier. The water level in the reservoir is controlled by an overflow that is directly
connected to the water drain.
• Ozone generator back-up battery
The timer of the ozone generator is powered with a non-rechargeable back-up
battery (CR2032) when there is no mains power available.
• Overheating protection
When the internal temperature of the humidifier reaches the maximum allowed
value (approximately 70 oC), a temperature sensor in the humidifier activates the
overheating protection. The capacity of the humidifier is gradually reduced until the
humidifier cools down.
For instructions on how to resolve overheating issues, see §8.3..

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3.2.Personal protection
Equip yourself with at least the following personal protective equipment:
During installation During maintenance
Wear protective boots Wear protective gloves
Wear safety glasses
3.3.Qualification of personnel
All procedures described in this document must be performed by someone who:
• has fully read and understood the contents of this manual;
• has fully read and understood the applicable laws and regulations regarding
workplace safety;
• is authorised by the owner.
In addition, the installation of the humidifier must be performed by someone who has
completed the installation training offered by Contronics.
The humidifier may not be used by persons (including children) with reduced physical,
sensory, or mental abilities, or persons lacking experience and knowledge, unless they
are being supervised by a person responsible for their safety or have received proper
instruction on the operation of the humidifier.
3.4.Safety instructions
The humidifier poses some residual risks when incorrectly installed, commissioned,
operated or maintained. Follow the instructions in this section to prevent hazardous
situations that may arise.
3.4.1.Transport & storage
6CAUTION
Always transport the humidifier in the original packaging. Transporting the humidifier in
any other packaging may damage the humidifier and void the warranty.
6CAUTION
Risk of damage to internal components. Water residue may remain in the reservoir:
• Always transport or store the humidifier in upright position.
• Always transport or store the humidifier in temperatures higher than 5 °C.

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3.4.2.Installation & commissioning
6WARNING
Risk of electric shock. The humidifier is powered by the mains power supply. Live
electric components are exposed when the access panels or casings are removed.
Touching live parts may cause severe injury or even death. To prevent this:
• When performing maintenance on the humidifier, remove the power cable from the
humidifier and wait until the display goes dark. Setting the capacity to 0 does not
shut off the power supply to the humidifier.
• Do not remove any casing panels when the humidifier is connected to a mains
power supply.
• Make sure both filters are installed.
• Make sure that all casing panels are present and fastened when the humidifier is in
operation.
6CAUTION
Risk of damage to internal components. The humidifier has an open water reservoir.
Overflow of the reservoir may damage the components inside the humidifier. To prevent
this:
• Disconnect the power cable from the humidifier and empty the water reservoir
before transport or performing maintenance activities.
• Keep the humidifier level and motionless while it is in operation and for up to two (2)
minutes afterwards.
• Make sure the water is properly discharged through the water drain. Make sure the
water drain is never blocked.
6CAUTION
Risk of electrostatic shock. The electronic components inside the humidifier are
sensitive to electrostatic discharge (ESD). Do not touch the circuit boards or other
electronic components inside the humidifier.
6CAUTION
Risk of reduced performance. When the humidifier distributes humidified air to
another room, make sure that both rooms have the same atmospheric pressure.
6CAUTION
Risk of damage to the humidifier. Joining the outlets of multiple humidifiers together
may cause water to flow into a humidifier that is switched off. Do not connect the air
distribution system or water drain pipes of multiple humidifiers to each other.
6CAUTION
Risk of contamination. Contamination may enter the humidifier or distribution system
during installation or maintenance. To prevent this:
• Wear gloves when installing or performing maintenance on the humidifier.
• Keep all components clean during installation.
• Disinfect the humidifier after installation.
6CAUTION
Risk of damage to electronic components. The humidifier contains sensitive electronic
components. Only connect the unit to a mains power supply with a supply voltage that
matches the voltage specified on the label (see §2.7.).

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6CAUTION
Risk of damage to the humidifier. The water drain connection is not pressurized. A
blocked drain channel may damage the humidifier:
• The outlet of the drain channel must be free. Do not place the outlet under water.
• Make sure that the water drain connection on the humidifier is the highest point in
the water drain channel.
• Do not place the humidifier on a tray with raised edges.
3.4.3.Operation
6WARNING
The humidifier is not intended for use in healthcare premises or other locations where
the occupants or materials are adversely sensitive to airborne bacteria, viruses, dust, and
debris.
3.4.4.Maintenance
6WARNING
Risk of injury to respiratory system. Ozone is harmful to your health if the gas is inhaled
over a longer period of time or in a higher concentration. To prevent this:
• Do not program the ozone disinfection process to run when there are people in the
vicinity of the air distribution outlets.
• Do not disconnect the air distribution system or water connections or dismantle the
casing when the ozone generator is active.
6CAUTION
Risk of product damage. The use of harsh or abrasive cleaning materials may damage
the humidifier. To prevent this:
• Do not clean the humidifier with solvents, aromatized, halogenized hydrocarbons or
other harsh chemicals.
• Do not clean the humidifier with hard or metallic brushes, or any other cleaning
materials that could leave scratches on wet, plastic and metal surfaces.
3.4.5.Hygiene
6WARNING
Risk to hygiene and health. Improper maintenance of the humidifier may cause
pathogens to originate from the water reservoir. These pathogens may be spread along
with the humidified air and transported via the distribution system. Failure to prevent
may cause injuries that require medical care. To prevent this:
• Regularly clean or replace the air filter panels on both sides of the humidifier.
• Supply the humidifier with demineralized water.
• Regularly run a flushing cycle (see §7.3.).
• Regularly run an ozone disinfection program (see §7.4.).

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Instruction manual
4.Transport & storage
This chapter provides all the information necessary to transport and store the humidifier.
4.1.Packaging
The humidifier is delivered in a reusable cardboard packaging.
NOTICE
• Some traces of water may be found in the packaging. The humidifier is thoroughly
tested before shipping and some water may remain in the reservoir before it is
packed.
• Store the packaging for later use. The packaging is reusable and can be used for
storage or for re-shipping the humidifier for maintenance activities.
4.2.Storage
Store the humidifier in the original packaging until it is installed, or when storing the
humidifier for a long period of time.
Store the humidifier in a room that meets the following requirements:
• Room temperature between 5 and 40 °C (41 and 104 °F).
• Room humidity between 10 and 75% (non-condensing).
4.3.Transport
6CAUTION
Always transport the humidifier in the original packaging. Transporting the humidifier in
any other packaging may damage the humidifier and void the warranty.

18 | Ultrasonic humidifier
5.Installation
This chapter provides all the information necessary to install the humidifier.
5.1.Safety
6WARNING
Before installing the humidifier, make sure you have read and understood the relevant
safety instructions in §3.4.. Important safety instructions will be repeated throughout this
chapter.
5.2.Removing and inspecting the packaging
After receiving the humidifier, do the following:
1.Inspect the outside of the packaging for damage.
2.Open the packaging and remove the contents. This includes the following:
• Humidifier
• Power cable
• Water connection pieces
• Quick start guide
NOTICE
Any custom components are delivered separately (see §2.8.1.).
3.Inspect the humidifier and other components for damage.
4.Verify that the model type on the type plate of the humidifier matches the one on
the order confirmation.
NOTICE
• Report any damage to the packaging, damage to the components or missing
components to Contronics or your supplier within 48 hours after delivery.
• Store the packaging for later use. The packaging is reusable and can be used for
storage or for re-shipping the humidifier for maintenance activities.
5.3.Placing the humidifier
5.3.1.Location requirements
Select a location that meets the following requirements:
• Ambient temperature between 0 and 40 °C.
• Humidity of less than (<) 100%.
• Accessible for operation and maintenance.
• An unused earthed power outlet nearby.

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5.3.2.Clearances around the humidifier
To ensure optimal performance and allow for easier operation and maintenance, place
the humidifier with the following clearances:
100 mm
10 mm
50 mm 50 mm
5.3.3.Instructions
Place the humidifier as follows:
• Place the humidifier on a flat, stable and level surface.
• Do not place the humidifier:
• in a closed tray with raised edges;
• on hot or cold surfaces;
• near vibrating components;
• near a heat source.

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5.4.Water connections
The humidifier must be connected to a water supply and water drain.
5.4.1.Connecting the water supply
Required materials:
• Water supply
• Dynamic pressure: 0.2 - 6 Bar
• RO water
• Temperature: 1 - 25 °C
• Backflow preventer
• Hose 3/8" HG
To connect the water supply:
1
2
1.Remove the protection cap from the water supply connection of the humidifier.
2.Screw the connection piece onto the water supply connection.
3.Thoroughly flush the supply pipe with clean water.
4.Connect the piping to the connection piece.
5.Connect the piping to a water supply.
NOTICE
If the water supply is far away from the humidifier or if multiple humidifiers are
connected to the same water supply, install a shut-off valve on the supply pipe, close to
the humidifier.