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

HU-25/45/85/245
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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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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.

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HU-25/45/85/245
Standard cycle
The humidier’s “ushing/alarm” LED will light up every hour. The device will start the
ushing cycle:
- The fogging will stop.
- The water tank will be ushed for approx. 15 seconds (depending on the water
pressure).
- The water will be discharged.
- The humidier will be re-lled and will restart normal operation.
- The green LED will blink while this procedure is taking place.
If the humidier is switched off (230V supply voltage switched off), the water content
will be discharged.
9. AIR CONNECTIONS
Air supply
Ensure a clean air supply without water droplets. Any air supply channel must be free
from obstructions.
Air outlet
The air outlet must always be extended by a 75 cm pipe to allow larger droplets to be
captured. Mount the outlet so that it slopes towards the humidier to ensure that any
condensed fog can ow back.
The connected pipe must be free from dust, dirt and oil residues. If an outlet opening is
blocked, the capacity will be reduced. The length of the air outlet channel to the outlet
may not exceed 6m with a diameter that remains the same.
10. SWITCHING ON AND STARTING UP/FUNCTIONAL TEST
Switching on
Check the following before the humidier is switched on for the rst time:
- The humidier is positioned level.
- All pipes have been properly connected.
- The mains voltage is correct and connected in parallel with any ventilators that
are used.
- The water discharge channel has been connected according to the instructions.
- The water supply has been connected according to the instructions. The water
piping has been ushed in order to prevent any installation debris blocking the
water valve.
IMPORTANT
Never switch the mains voltage on if the humidier is not in the correct position
or if it is placed upside-down, as this would cause the transducers to burn.

HU-25/45/85/245
12
Start up and functional test
- Open the water valve
- Set the % RH knob on maximum position
- Switch on the power and check if:
a. The water runs to the humidier
b. The water ow stops after about 60 seconds.
c. The production of mist starts after a few seconds
- Switch off the power and check if:
a. The water content is drained away.
b. After about 1 minute the water reservoir is emptied completely.
- Connect the water drain and check for leakages
- Switch on the main supply again
- Set the % knob in the desired position
- Control if necessary the airspeed with setting 5 (gure 1).
Note: During start up and ushing (water lling) of the humidier the LED
“Flushing/alarm” will blink green.This is a normal indication on the
humidier during this procedure.
IMPORTANT
If the humidier becomes overheated it will switch off. Once it has cooled
down it will automatically switch on again. In case of overheating,
the “Flushing/alarm” LED will show red.
The following conditions could cause overheating:
-A blockage in the air inlet.
-A blockage in the air outlet.
-Air intake temperature too high.
-Water temperature too high.
-Water discharge blocked.
-Ambient temperature too high.
-Ventilator speed set too low.

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HU-25/45/85/245
11. OZONE GENERATOR (OPTIONAL)
As an option, an ozone generator may be integrated in the HU by the manufacturer.
Ozone ensures that any bacteria that are present in the humidier and the connected
piping will be destroyed.
Ozone only takes effect if the humidication is switched off while the ozone generation
is taking place. A programmable timer has been incorporated in the side panel of the
humidier for switching the ozone generator and the humidication on and off.
Contronics sets the timer to a default setting of 2 hours of ozone generation at night,
between 2 a.m. and 4 a.m., while the humidier is switched off. This setting can be
changed (see “Applications”).
The timer is independent of the mains supply and has a rechargeable battery incorporated in
the ozone module for this purpose.
The following information about the ozone generator can be found on www.contronics.nl:
- Programming the timer.
- What is ozone?
WARNING
Ozone could be harmful to your health if the gas is inhaled over a longer
period of time in a higher concentration. However, this concentration only
occurs inside the humidier and the connected piping. Once discharged, ozone
gas quickly breaks down into ordinary oxygen, without any residual products.
WARNING
If these batteries have to be replaced, the old battery must be disposed off as
chemical waste or, alternatively, returned to the manufacturer.

HU-25/45/85/245
14
12. MAINTENANCE
Regular maintenance is important for the optimum operation of the humidier and to
maintain hygiene.
The maintenance interval of the water reservoir will depend on the quality of the water and the
purity of the air that is sucked in. The transducers must be replaced after
approximately 20,000 operating hours (i.e. after about 2 years in the case of continuous use).
Check the following before starting maintenance or shipping the humidier:
- The mains plug has been removed from the socket and the ventilator is not
moving.
- The water supply has been closed.
- The water supply pipe has been removed.
- The humidity sensor plug has been removed.
- The water reservoir is empty and the water discharge hose has been removed.
- The humidier remains horizontal while dismantling.
Cleaning
- Remove the connecting ange.
- Clean the reservoir with a soft brush or cloth.
In the case of water scale, the reservoir can be lled with household vinegar. Allow
to soak for 4-12 hours then clean with a soft brush and ush through. Remove the
lter from the water inlet. Clean the lter or replace it with a new one. Flush the water
discharge with water and clean it with a round brush.
13. MAINTENANCE OF THE OZONE GENERATOR (OPTIONAL)
The ceramic element must be cleaned once a year:
- The humidier must be disconnected from the mains.
- Remove the screws on the side where the timer is located.
- Remove the side panel and disconnect the timer.
- Remove the 2 Phillips screws (bottom and top) from the stainless steel cover
plate (on the black aluminium casing).
- Remove the ceramic element from the holder.
- Carefully clean the ceramic element on both sides with cleaning spirit or alcohol.
- If the vapour-deposited metal on the ceramic element is damaged, replace the
ceramic element.
- Re-assemble in the reverse order.
IMPORTANT
Make sure that the transducers are not damaged during cleaning.

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HU-25/45/85/245
14. REPLACING SPARE PARTS
Replacing the transducers
The replacement of the transducers can only be done by Contronics or representatives
authorised by Contronics.
15. APPLICATIONS OF THE HUMIDIFIER
Various information sheets and drawings are available covering different applications.
These can be downloaded from www.contronics.nl.
IMPORTANT
All maintenance must be carried out by Contronics or by an organisation
authorized by Contronics.

HU-25/45/85/245
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16. MALFUNCTIONS
Is the plug in the
socket?
Is the green Flushing
LED blinking?
Is the water supply
tap opened?
Is water flowing into
the water tank?
Is the fuse faulty?
- Float faulty
- Fault in the internal electronics.
Consult Technician
Replace fuse
Open the water
supply tap
- Water pressure too low
- Water pipe dirty
- Water supply valve faulty
(if applied)
-R.O. folter faulty (if applied)
Does the
Flushing LED switch
off when the tank is
filled?
Is there activity but
no humidification?
Is the ventilator
running?
Is the blue Fogging
LED on?
- Float is stuck
- Internal electronics faulty.
Consult Technician
- Transducer worn or faulty
- Internal fuse faulty
- Internal electronics faulty.
Consult Technician
Turn the grey rotary
button to the right.
No. 5 in figure 1.
Turn the %RH dial to
the right
Remove the sensor
plug connection
Is the blue Fogging
LED on?
Is the ventilator
running?
- Float faulty
- Fault in the internal electronics.
Consult Technician
Add a drop of
washing-up liquid
Is the blue
Fogging
LED on?
Sensor faulty
Consult Technician
Humidifier does not
humidify
Insert the plug in the
socket
no
yes yes
no
no
no
yes
no
yes
yes
no
no
no
yes
no
yes
yes
yes
yes
no no
no
yes
yes

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HU-25/45/85/245
17. TECHNICAL SPECIFICATIONS
HU-25 HU-45
Transducer frequency 1,7 MHz 1,7 MHz
Maximum capacity 0-1,2 kg/hour (adjustable) 0-3,0 kg/hour (adjustable)
Service life of the transducers 10.000-20.000 hours 10.000 - 20.000 hours
Size of the water droplets 1-3 micron 1-3 micron
Diameter of outlet ange 2 x 40 mm 4 x 40 mm (or 1 x 80 with
adapter)
Diameter of suction ange 80 mm 80 mm
Air ow Adjustable (0-60 m30 Pa) Adjustable (0-60 m30 Pa)
Outlet pipe length 6 meter 6 meter
Water pressure 1-6 bar 1-6 bar
Water connection 3/4" external 3/4" external
Maximum water hardness 8º German hardness
(demineralised water
recommended)
8º German hardness
(demineralised water
recommended)
Flushing frequency 1x per hour (adjustable) 1x per hour (adjustable)
Water discharge 1/2" external 1/2" external
Content of water tank 300 cm3650 cm3
Mains voltage 230V ± 10% 50/60 Hz 230V ± 10% 50/60 Hz
Power consumption 120 W 250 W
Ambient temperature 0 °C till 35 °C 0 °C till 35 °C
Water temperature 5 °C till 15 °C 5 °C till 15 °C
Ambient temperature compared
to supply air temperature
Non condensing Non condensing
Dimensions (LxWxH) 270 x 260 x 160 mm 325 x 265 x 215 mm
Housing Stainless steel 316L Stainless steel 316L
Weight 8 kg 11,5 kg
OG (with integrated ozone generator)
Capacity ozone 0-20 mg/hour (adjustable) 0-20 mg/hour (adjustable)
Controlling ozone Via timer with day programming Via timer with day programming

HU-25/45/85/245
18
HU-85 HU-245
Transducer frequency 1,7 MHz 1,7 MHz
Maximum capacity 0-6,0 kg/hour (adjustable) 0-18,0 kg/hour (adjustable)
Service life of the transducers 10.000-20.000 hours 10.000 - 20.000 hours
Size of the water droplets 1-3 micron 1-3 micron
Diameter of outlet ange 2 x 80 mm or 8 x 40 mm 2 x 110 mm
Diameter of suction ange 80 mm 80 mm
Air ow adjustable (0-60 m30 Pa) adjustable (0-200 m30 Pa)
Outlet pipe length 6 meter 12 meter
Water pressure 1-6 bar 1-6 bar
Water connection 3/4" external 3/4" external
Maximum water hardness 8º German hardness
(demineralised water
recommended)
8º German hardness
(demineralised water
recommended)
Flushing frequency 1x per hour (adjustable) 1x per hour (adjustable)
Water discharge 1/2" external 3/4" external
Content of water tank 1500 cm34000 cm3
Mains voltage 230V ± 10% 50/60 Hz 230V ± 10% 50/60 Hz
Power consumption 450 W 1,3 KW
Ambient temperature 0 °C till 35 °C 0 °C till 35 °C
Water temperature 5 °C till 15 °C 5 °C till 15 °C
Ambient temperature compared
to supply air temperature
Non condensing Non condensing
Dimensions (LxWxH) 450 x 265 x 290 mm 660 x 425 x 290 mm
Housing Stainless steel 316L Stainless steel 316L
Weight 18 kg 43 kg
OG (with integrated ozone generator)
Capacity ozone 0-20 mg/hour (adjustable) 0-20 mg/hour (adjustable)
Controlling ozone Via timer with day programming Via timer with day programming

19
HU-25/45/85/245
DISCLAIMER
Contronics works continuously on the further development of its humidiers. We there-
fore reserve the right to modify the design, construction and technology of the product
at any time. For this reason, no claims can be made based on the data, illustrations and
description in this user manual.
Additional, up-to-date information is available on www.contronics.nl.

HU-25/45/85/245
20
P.O. Box 144
5490 AC Sint-Oedenrode
The Netherlands
Telephone: [phone]
Telefax: [phone]
Website: www.contronics.nl
E-mail: [email protected]