Contronics HU-25 User manual

01-03-2016 version 1.7
HUMIDIFIER
USER MANUAL
HU-25/45/85/245

HU-25/45/85/245
2
Contronics Engineering B.V., Ambachtsweg 8, 5492 NJ Sint-Oedenrode,
The Netherlands, hereby declares that products HU-25, HU-45, HU-85 and HU-245
produced and delivered by Contronics Engineering B.V., are in accordance with the
following CE directives:
EMC-Directive : 2014/30/EU
Directive for low-voltage
electrical installation : 2014/35/EU

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HU-25/45/85/245
Table of contents
1. PREFACE ��������������������������������������������������������������������������������������������������������� 4
2. INTRODUCTION ��������������������������������������������������������������������������������������������� 5
3. SAFETY REGULATIONS ������������������������������������������������������������������������������ 6
4. PACKING���������������������������������������������������������������������������������������������������������� 6
5. CONNECTIONS AND FUNCTIONS ������������������������������������������������������������ 7
6. INSTALLATION INSTRUCTIONS ���������������������������������������������������������������� 8
7. ELECTRICAL CONNECTIONS �������������������������������������������������������������������� 9
8. WATER CONNECTIONS AND FLUSHING CYCLE ������������������������������� 10
9. AIR CONNECTIONS������������������������������������������������������������������������������������� 11
10. SWITCHING ON AND STARTING UP/FUNCTIONAL TEST�������������� 11
11. OZONE GENERATOR (OPTIONAL) ������������������������������������������������������� 13
12. MAINTENANCE ������������������������������������������������������������������������������������������ 14
13. MAINTENANCE OF THE OZONE GENERATOR (OPTIONAL) �������� 14
14. REPLACING SPARE PARTS ������������������������������������������������������������������� 15
15. APPLICATIONS OF THE HUMIDIFIER �������������������������������������������������� 15
16. MALFUNCTIONS���������������������������������������������������������������������������������������� 16
17. TECHNICAL SPECIFICATIONS �������������������������������������������������������������� 17

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1. PREFACE
This user manual contains the operating, installation and maintenance instructions for
the ultrasonic humidier of types HU-25, HU-45, HU-85 and HU-245.
WARNING
It is possible that bacteria could be present in the humidier’s water supply.
Some bacteria (Legionella) could be harmful to health if they are present in
the aerosols that are blown out by the humidier.
Through the construction, ushing programme and materials used,
Contronics has ensured that the stimulation of bacterial growth is kept to the
absolute minimum. In order to ensure the supply of pure water, it is strongly
recommended that demineralised water is used (see the Contronics product
range). In conditions where bacterial pollution could occur in the surrounding
air (e.g. at meat counters) or in areas where hot ambient air could arise (e.g.
bakeries), it is also recommended to incorporate an ozone generator in the air
supply system (see the Contronics product range). Contronics cannot be held
liable for any harm caused by bacteria or micro-organisms. It is the
responsibility of the user to regularly carry out maintenance and to check the
quality of the supplied water.
IMPORTANT
Although the installation of this product may appear quite simple for experts,
the manufacturer urges the installer to carefully read through the instructions
before starting to install the device.

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HU-25/45/85/245
2. INTRODUCTION
Principle of ultrasonic air humidication
Minute water droplets with a size of 1 to 3 microns are ejected above the water surface
by means of high-frequency vibrations (1.7 MHz). The humidier’s air movement
system ensures that these water droplets are then blown into the area to be
humidied. The major advantages of this humidier are the very low energy
consumption, the limited amount of maintenance required and the low noise level.
Continuously-variable air humidity control (CVH)
The humidier has a dial with which the capacity can be regulated between 0 and the
maximum per hour. If a humidity sensor has been connected to the humidier, the
desired humidity can be set between 35% and 95% using the same dial. The CVH
system will then control the humidity proportional to the set value. The humidier is
therefore continuously in operation and ensures that the relative humidity is maintained
at the set value. Instead of controlling the humidity with a humidity sensor, it is also
possible to control the humidier externally (0-10V), for example by using the DZR-45
and HTR-10 controllers.
Capacity
There is no limit to the modular expansion of the HU and this can be carried out as and
when needed. This means that an unlimited number of modules can be linked together
to form one system, thus allowing the capacity to be increased. As a result of the very
high frequency of 1.7 MHz, the water droplets are minute, causing them to evaporate
quickly and thereby cause less condensation in the humidier’s distribution pipes on
their way towards the area to be humidied.
Water quality
Even though the humidier itself can be connected to plain tap water up to 8° German
hardness, Contronics recommends demineralised water. This will limit the maintenance
of the device to a minimum and the service life of the transducer will be considerably
extended.
Disinfection
For situations where bacterial purity is necessary (food industry) it is possible to connect an
ozone generator. Contronics has an ozone generator in its delivery program.

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3. SAFETY REGULATIONS
4. PACKING
The HU is delivered in recyclable packaging that should be kept for re-shipping the unit
for maintenance activities. Any shipment using other packaging could cause damage to
the HU for which the manufacturer cannot be held liable.
It is possible that some traces of water could be found in the packaging; all the
functions of the HU are thoroughly tested during the quality control and, for this reason,
some water could still remain in the HU before it is packed.
The package contains:
- HU humidier.
- Power cord.
- Instructions for use.
IMPORTANT
The humidier has an open water tank. Any overow of the water tank could
damage the electronics inside the humidier.
The following measures must always be observed:
-Always disconnect the 230 V mains voltage from the humidier before
moving it and/or carrying out maintenance activities.
-Always keep the humidier horizontal and motionless while it is in
operation and for up to 2 minutes afterwards.
-Ensure that the water is always discharged via the outlet and ensure that
this is never blocked.
-The humidier may only be dismantled by authorized Contronics
technicians.

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HU-25/45/85/245
5. CONNECTIONS AND FUNCTIONS
Figure 1 Connections and functions
1 Plug connection for HS-91, DZR-45, HTR-10 or HK-01 (external control 0-10 V).
2. LED for ushing and alarm.
3. Dial for setting the humidity.
4. LED for humidity setting.
5. Dial for setting the airspeed.
6. Water outlet 1/2” free ow-through. (HU-245: 3/4”).
7. Water supply 3/4”, min. 1 bar/max. 6 bar.
8. Mains connection + fuse (230 V± 10%/50-60 Hz).
9. Timer for programming of the ozone generator and humidier (OG option).
123 5
6 7 8 9
4

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6. INSTALLATION INSTRUCTIONS
Figure 2 General set-up
1. Place the humidier in an environment with a temperature between 0°C and 35°C
and humidity < 100%.
2. Place the humidier in a level position (2-dimensional).
3. Never place the humidier on a closed tray with raised edges.
IMPORTANT
The guarantee will become void if the humidier is installed incorrectly or if it
is handled in an improper manner.
Air outlet
> 75 cm
Length < 50 cm
Diameter > ½”
Water outlet
Water supply
Buffer tank
R.O Unit
230 V AC

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HU-25/45/85/245
7. ELECTRICAL CONNECTIONS
Supply voltage (230V AC ± 10%)
Ensure there is an earthed wall socket next to the humidier. If necessary, connect it in
parallel to any external ventilators. This will ensure that the ventilators and the
humidier switch on and off simultaneously.
Sensor connection
Mount the sensor in a suitable place (for measuring) and connect the DIN plug to the
humidier.
External control voltage
The HU can be controlled via an external control voltage (0-10 Volt). Use the HK-01
cable for this purpose. The DIN plug is connected to the humidier, which can then be
controlled using a direct current of 0 Volt (min.) up to 10 Volt (max.).
The humidier can also be switched on and off using the same signal and HK-01 cable.
If there is a short-circuit between the two cables, the humidier will switch to stand-by
mode and will not continue to humidify. If the contact is opened, the humidier will
immediately start operating again at the capacity set on the dial (Figure 1, Setting 3).
IMPORTANT
If an external controller has been connected to the DIN plug, the dial on the
humidier must be set to 0. This will prevent the humidier from humidifying if
a fault occurs in the controller.
IMPORTANT
The external control signal must be oating with respect to earth (there must
never be a connection to “earth”). Set the capacity dial to 0. The output
impedance of the external control signal must be < 470Ω.

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8. WATER CONNECTIONS AND FLUSHING CYCLE
Water supply
The humidier has an integrated ow-reduction valve and can handle a water pressure
from a minimum of 1 bar to a maximum of 6 bar. The water level in the humidier is
controlled by a oat switch and a solenoid valve.
Demineralised (R.O.) water must be used for the humidier and will provide adequate
protection against bacteria. The use of plain tap water will lead to faster contamination
of the water tank and transducerss, which will result in a shorter service life. Moreover,
the dissolved calcium and mineral particles in ordinary tap water will be blown into the
area to be humidied together with the fog droplets and will be precipitated in the area.
Depending on the hardness of the water, this could cause a layer of dust after only a
few days (see also the warning on page 4).
Water discharge
Connect a hose with a maximum length of 50 cm and a minimum diameter of 1/2” to
the humidier’s water discharge connection point so that any excess water can be
discharged from the humidier. The outlet of this hose or pipe must be free; the end
may not be hanging in the water (see Figure 2). The water discharge from the
humidier is unpressurised.
Flushing
The standard factory setting for the ushing cycle is once every hour. This may not be
suitable for some applications. In these cases, the ushing cycle can be modied to
take place once every two hours or set to no ushing cycle at all (consult the
manufacturer).
IMPORTANT
Thoroughly ush out the piping before connecting the humidier in order to
prevent installation debris from blocking the intake valve.
IMPORTANT
The water discharge connection point on the humidier must constitute the
highest point on the water discharge channel. The water discharge is not
pressurised. A blocked outlet could damage the humidier.
A blocked water discharge channel could cause the humidier to overow.
For this reason, never place the humidier on a tray with raised edges as this
could cause damage to the humidier for which the manufacturer cannot be
held liable.