Brune HP25 User manual

INSTRUCTIONS MANUAL [EN]
HP25

CONTENTS
PAGE
1. GENERAL SAFETY INFORMATION ............................................................................................................................... 1
2. APPLIANCE RELEVANT SAFETY INFORMATION......................................................................................................... 13
3. GENERAL ADVICE ...................................................................................................................................................... 15
4. DEHUMIDIFIER PRINCIPLES....................................................................................................................................... 15
5. INSTALLATION AND TRANSPORTATION.................................................................................................................... 15
6. OPERATING INSTRUCTIONS...................................................................................................................................... 16
7. ELECTRONIC CONTROL ............................................................................................................................................. 17
8. WORKING WITH DIRECT DRAINAGE ......................................................................................................................... 20
9. WORKING MODE WITH CONDENSATE PUMP (OPTION).......................................................................................... 21
10. ELECTRICAL CONNECTIONS .................................................................................................................................... 22
11. OPERATING CONDITIONS ....................................................................................................................................... 22
12. SPECIFICATIONS...................................................................................................................................................... 22
13. TROUBLESHOOTING................................................................................................................................................ 23
14. MAINTENANCE........................................................................................................................................................ 23
15. ELECTRIC DIAGRAMS .............................................................................................................................................. 24
16. DISPOSAL ................................................................................................................................................................ 25

1 [EN]
1. GENERAL SAFETY INFORMATION
The operator must provide the user with the operating
instructions and ensure that the user understands the
contents.
-The appliance contains a flammable refrigerant.
-This is a natural refrigerant.
-Read the supplied instructions/warnings.
-Read the service manual.
-Read the operators manual.
This appliance can be used by children aged from 8 years and
above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in
a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without supervision.

2 [EN]
WARNING
Risk of fire/flammable materials
WARNINGS
-Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.
-The appliance shall be stored in a room without continuously
operating ignition sources (for example: open flames, an
operating gas appliance or an operating electric heater).
-Do not pierce or burn.
-Be aware that the refrigerants may not contain an odour.
-Appliance should be installed, operated and stored in a room
with a floor area larger than 4 m².
-Compliance with national gas regulations shall be observed.
-R290 has a low GWP (Global Warming Potential) of 3 and an
ODP (Ozone Depletion Potential) of 0.
-The maximum refrigerant charge amount: 0,150 kg.
-Keep ventilation openings clear of obstruction.
-The appliance shall be stored so as to prevent mechanical
damage from occurring.
-A warning that the appliance shall be stored in a well-ventilated
area where the room size corresponds to the room area as
specified for operation.

3 [EN]
-Any person who is involved with working on or breaking into a
refrigerant circuit should hold a current valid certificate from an
industry-accredited assessment authority, which authorizes
their competence to handle refrigerants safely in accordance
with industry’s recognized assessment specification.
-Servicing shall only be performed as recommended by the
equipment manufacturer. Maintenance and repair requiring the
assistance of other skilled personnel shall be carried out under
the supervision of the person competent in the use of
flammable refrigerants.
INFORMATION ON SERVICING
1. Checks to the area
Prior to beginning work on systems containing flammable
refrigerants, safety checks are necessary to ensure that the risk of
ignition is minimized. For repair to the refrigerating system, the
following precautions shall be complied with prior to conducting
work on the system.
2. Work procedure
Work shall be undertaken under a controlled procedure so as to
minimize the risk of a flammable gas or vapour being present
while the work is being performed.
3. General work area
All maintenance staff and others working in the local area shall be
instructed on the nature of work being carried out. Work in
confined spaces shall be avoided. The area around the workspace
shall be sectioned off. Ensure that the conditions within the area
have been made safe by control of flammable material.

4 [EN]
4. Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant
detector prior to and during work, to ensure the technician is
aware of potentially flammable atmospheres. Ensure that the leak
detection equipment being used is suitable for use with
flammable refrigerants, i.e. non-sparking, adequately sealed or
intrinsically safe.
5. Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment
or any associated parts, appropriate fire extinguishing equipment
shall be available to hand. Have a dry powder or CO2 fire
extinguisher adjacent to the charging area.
6. No ignition sources
No person carrying out work in relation to a refrigeration system
which involves exposing any pipe work that contains or has
contained flammable refrigerant shall use any sources of ignition
in such a manner that it may lead to the risk of fire or explosion.
All possible ignition sources, including cigarette smoking, should
be kept sufficiently far away from the site of installation,
repairing, removing and disposal, during which flammable
refrigerant can possibly be released to the surrounding space.
Prior to work taking place, the area around the equipment is to be
surveyed to make sure that there are no flammable hazards or
ignition risks. No Smoking signs shall be displayed.
7. Ventilated area
Ensure that the area is in the open or that it is adequately
ventilated before breaking into the system or conducting any hot
work. A degree of ventilation shall continue during the period that
the work is carried out. The ventilation should safely disperse any

5 [EN]
released refrigerant and preferably expel it externally into the
atmosphere.
8. Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit
for the purpose and to the correct specification. At all times the
manufacturer's maintenance and service guidelines shall be
followed. If in doubt consult the manufacturer's technical
department for assistance.
The following checks shall be applied to installations using
flammable refrigerants:
-The charge size is in accordance with the room size within which
the refrigerant containing parts are installed;
-The ventilation machinery and outlets are operating adequately
and are not obstructed;
-If an indirect refrigerating circuit is being used, the secondary
circuit shall be checked for the presence of refrigerant;
-Marking to the equipment continues to be visible and legible.
Markings and signs that are illegible shall be corrected;
-Refrigeration pipe or components are installed in a position
where they are unlikely to be exposed to any substance which
may corrode refrigerant containing components, unless the
components are constructed of materials which are inherently
resistant to being corroded or are suitably protected against
being so corroded.
9. Checks to electrical devices
Repair and maintenance to electrical components shall include
initial safety checks and component inspection procedures. If a
fault exists that could compromise safety, then no electrical
supply shall be connected to the circuit until it is satisfactorily

6 [EN]
dealt with. If the fault cannot be corrected immediately but it is
necessary to continue operation, an adequate temporary solution
shall be used. This shall be reported to the owner of the
equipment so all parties are advised.
Initial safety checks shall include:
-That capacitors are discharged: this shall be done in a safe
manner to avoid possibility of sparking;
-That there no live electrical components and wiring are exposed
while charging, recovering or purging the system;
-That there is continuity of earth bonding.
Repairs to sealed components
1. During repairs to sealed components, all electrical supplies
shall be disconnected from the equipment being worked upon
prior to any removal of sealed covers, etc. If it is absolutely
necessary to have an electrical supply to equipment during
servicing, then a permanently operating form of leak detection
shall be located at the most critical point to warn of a potentially
hazardous situation.
2. Particular attention shall be paid to the following to ensure
that by working on electrical components, the casing is not altered
in such a way that the level of protection is affected. This shall
include damage to cables, excessive number of connections,
terminals not made to original specification, damage to seals,
incorrect fitting of glands, etc.
Ensure that apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded such that
they no longer serve the purpose of preventing the ingress of

7 [EN]
flammable atmospheres. Replacement parts shall be in
accordance with the manufacturer's specifications.
NOTE: The use of silicon sealant may inhibit the effectiveness of
some types of leak detection equipment. Intrinsically safe
components do not have to be isolated prior to working on them.
Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the
circuit without ensuring that this will not exceed the permissible
voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be
worked on while live in the presence of a flammable atmosphere.
The test apparatus shall be at the correct rating.
Replace components only with parts specified by the
manufacturer. Other parts may result in the ignition of refrigerant
in the atmosphere from a leak.
Cabling
Check that cabling will not be subject to wear, corrosion, excessive
pressure, vibration, sharp edges or any other adverse
environmental effects. The check shall also take into account the
effects of aging or continual vibration from sources such as
compressors or fans.
Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be used
in the searching for or detection of refrigerant leaks. A halide
torch (or any other detector using a naked flame) shall not be
used.

8 [EN]
Leak detection methods
The following leak detection methods are deemed acceptable for
systems containing flammable refrigerants.
Electronic leak detectors shall be used to detect flammable
refrigerants, but the sensitivity may not be adequate, or may need
re-calibration. (Detection equipment shall be calibrated in a
refrigerant-free area.) Ensure that the detector is not a potential
source of ignition and is suitable for the refrigerant used. Leak
detection equipment shall be set at a percentage of the LFL of the
refrigerant and shall be calibrated to the refrigerant employed
and the appropriate percentage of gas (25 % maximum) is
confirmed.
Leak detection fluids are suitable for use with most refrigerants
but the use of detergents containing chlorine shall be avoided as
the chlorine may react with the refrigerant and corrode the
copper pipe-work.
If a leak is suspected, all naked flames shall be removed/
extinguished.
If a leakage of refrigerant is found which requires brazing, all of
the refrigerant shall be recovered from the system, or isolated (by
means of shut off valves) in a part of the system remote from the
leak. Oxygen free nitrogen (OFN) shall then be purged through the
system both before and during the brazing process.
Removal and evacuation
When breaking into the refrigerant circuit to make repairs or for
any other purpose conventional procedures shall be used.
However, it is important that best practice is followed since
flammability is a consideration.
The following procedure shall be adhered to:

9 [EN]
Remove refrigerant;
Purge the circuit with inert gas;
Evacuate;
Purge again with inert gas;
Open the circuit by cutting or brazing.
The refrigerant charge shall be recovered into the correct
recovery cylinders. The system shall be flushed with OFN to
render the unit safe. This process may need to be repeated
several times. Compressed air or oxygen shall not be used for this
task. Flushing shall be achieved by breaking the vacuum in the
system with OFN and continuing to fill until the working pressure
is achieved, then venting to atmosphere, and finally pulling down
to a vacuum. This process shall be repeated until no refrigerant is
within the system. When the final OFN charge is used, the system
shall be vented down to atmospheric pressure to enable work to
take place. This operation is absolutely vital if brazing operations
on the pipe-work are to take place. Ensure that the outlet for the
vacuum pump is not close to any ignition sources and there is
ventilation available.
Charging procedures
In addition to conventional charging procedures, the following
requirements shall be followed.
Ensure that contamination of different refrigerants does not occur
when using charging equipment. Hoses or lines shall be as short as
possible to minimise the amount of refrigerant contained in them.
Cylinders shall be kept upright.
Ensure that the refrigeration system is earthed prior to charging
the system with refrigerant.
Label the system when charging is complete (if not already).

10 [EN]
Extreme care shall be taken not to overfill the refrigeration
system.
Prior to recharging the system it shall be pressure tested with
OFN. The system shall be leak tested on completion of charging
but prior to commissioning. A follow up leak test shall be carried
out prior to leaving the site.
Decommissioning
Before carrying out this procedure, it is essential that the
technician is completely familiar with the equipment and all its
detail. It is recommended good practice that all refrigerants are
recovered safely. Prior to the task being carried out, an oil and
refrigerant sample shall be taken in case analysis is required prior
to re-use of reclaimed refrigerant. It is essential that electrical
power is available before the task is commenced.
a)Become familiar with the equipment and its operation.
b)Isolate system electrically.
c) Before attempting the procedure ensure that:
•Mechanical handling equipment is available, if required, for
handling refrigerant cylinders;
•All personal protective equipment is available and being
used correctly;
•The recovery process is supervised at all times by a
competent person;
•Recovery equipment and cylinders conform to the
appropriate standards.
d)Pump down refrigerant system, if possible.
e)If a vacuum is not possible, make a manifold so that refrigerant
can be removed from various parts of the system.

11 [EN]
f) Make sure that cylinder is situated on the scales before
recovery takes place.
g)Start the recovery machine and operate in accordance with
manufacturer's instructions.
h)Do not overfill cylinders. (No more than 80 % volume liquid
charge).
i) Do not exceed the maximum working pressure of the cylinder,
even temporarily.
j) When the cylinders have been filled correctly and the process
completed, make sure that the cylinders and the equipment
are removed from site promptly and all isolation valves on the
equipment are closed off.
k)Recovered refrigerant shall not be charged into another
refrigeration system unless it has been cleaned and checked.
Labelling
Equipment shall be labelled stating that it has been de-
commissioned and emptied of refrigerant. The label shall be dated
and signed. Ensure that there are labels on the equipment stating
the equipment contains flammable refrigerant.
Recovery
When removing refrigerant from a system, either for servicing or
decommissioning, it is recommended good practice that all
refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure that only
appropriate refrigerant recovery cylinders are employed. Ensure
that the correct number of cylinders for holding the total system
charge is available. All cylinders to be used are designated for the
recovered refrigerant and labelled for that refrigerant (i.e. special
cylinders for the recovery of refrigerant). Cylinders shall be

12 [EN]
complete with pressure relief valve and associated shut-off valves
in good working order. Empty recovery cylinders are evacuated
and, if possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set
of instructions concerning the equipment that is at hand and shall
be suitable for the recovery of flammable refrigerants. In addition,
a set of calibrated weighing scales shall be available and in good
working order. Hoses shall be complete with leak-free disconnect
couplings and in good condition. Before using the recovery
machine, check that it is in satisfactory working order, has been
properly maintained and that any associated electrical
components are sealed to prevent ignition in the event of a
refrigerant release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant
supplier in the correct recovery cylinder, and the relevant Waste
Transfer Note arranged. Do not mix refrigerants in recovery units
and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that
they have been evacuated to an acceptable level to make certain
that flammable refrigerant does not remain within the lubricant.
The evacuation process shall be carried out prior to returning the
compressor to the suppliers. Only electric heating to the
compressor body shall be employed to accelerate this process.
When oil is drained from a system, it shall be carried out safely.

13 [EN]
2. APPLIANCE RELEVANT SAFETY INFORMATION
ATTENTION
This dehumidifier must not be used in rooms under the
following conditions:
- Potentially explosive atmosphere
- Aggressive atmospheres
- Featuring a high concentration of solvents
- An extremely high ratio of dust
Keep Unit Grounded: Always operate the unit with a grounding
plug and a grounded electrical outlet. A grounding plug is an
essential safety feature that helps reduce the risk of shock or fire.
Protect Power Cord from Damage: Never operate a unit with a
damaged power cord, as this may lead to electrical or fire hazards.
If the power supply cord is damaged, it must be replaced by a cord
of the same type and amperage rating.
Extension Cords: Extension cords must be grounded and able to
deliver the appropriate voltage to the unit.
Handle with Care: Do not drop, throw or crash the dehumidifier.
Rough treatment can damage the components or wiring and
create a hazardous condition.
Run on Stable Surface: Always operate the unit on a stable, level
surface, for example the floor or a strong counter, so that the
dehumidifier cannot fall and cause injury.

14 [EN]
Keep Out of Water: Never operate the unit in pooled or standing
water, as this may create a risk of injury from electrical shock. Do
not store or operate outdoors. If electrical wiring or components
become wet, thoroughly dry them before using the unit. If in
doubt do not use the dehumidifier and consult a qualified
technician or a vendors approved engineer.
Keep Air Intakes Clear: Do not clog or block the air intakes by
placing the dehumidifier too close to curtains, walls or anything
that will restrict the air inlet. This may cause the unit to overheat
and result in a fire or electrical hazard.
Keep Filter Clean: Always use a clean air filter. Do not allow any
material to clog the filter, as this may cause the dehumidifier to
overheat. Never use without a filter. Always check, and if
necessary, clean the filter before switching the dehumidifier on.
Do not allow oil, grease, or other contaminants to be drawn into
the dehumidifier.
Keep Electrical Components Dry: Never allow water inside the
dehumidifier's electrical components. If these areas become wet
for any reason, thoroughly dry them before using the
dehumidifier. If in doubt do not use the dehumidifier and consult
a qualified technician or a vendors approved engineer.

15 [EN]
3. GENERAL ADVICE
Before putting your dehumidifier into operation for the first time, the instructions manual should be studied carefully.
After receiving the unit, you should check your dehumidifier for any transport damage. In case of damage, you should
inform the sender immediately.
Transport damages should be stated after unpacking the equipment. The respective seller or specialised reseller should
be contacted immediately.
Keep the packaging for the dehumidifier in a safe place in order to be able to dispatch the dehumidifier safely if it
requires a service. In order to save space, you can simply cut through the adhesive tape using a knife and fold up the
cardboard box.
4. DEHUMIDIFIER PRINCIPLES
This dehumidifier is designed to reduce humidity from the air in a building or part of a building. The purpose is to prevent
humidity damage, and to dry out wet materials such as carpet, floors, walls, furniture, contents, timber, and structural
materials.
This dehumidifier can prevent the formation of condensation, reduce air humidity and keep constant a desired relative
humidity value. The time necessary for the dehumidifier to dry a room and reach the desired relative humidity depends
on the environmental conditions prevailing within the room. For example, the number of air changes with outside, any
sources of moisture and the room temperature can all either speed up or slow down the dehumidification process.
The dehumidifier functions according to the condensation principle with heat recovery. The fan takes the humid air from
the room in and across a filter and then through an evaporator. Here the air is cooled below dew point so that the water
vapour of the air forms a condensate on the coils which flows into the water collecting tank. The cooled and dried air is
heated again by a condenser. By recycling the room air through the dehumidifier over and over again the moisture
content and relative humidity of the air is reduced.
5. INSTALLATION AND TRANSPORTATION
For installation and transportation, the following instructions must be considered:
The air inlet and the air outlet must not be covered whilst the dehumidifier is in operation.
Before any moving the dehumidifier, the mains plug is to be removed from the socket and the water tank should
be emptied.
For transport purposes the dehumidifier should be secured on a levelled base and must be prevented from
rolling around.
The dehumidifier must always be transported vertically.
This dehumidifier must be used exclusively for air dry.
If the dehumidifier has been in a horizontal position for any time over a few minutes, you must let it stand in the
upright position for at least 30 minutes before operating. This allows the oil to drain back into the compressor.

16 [EN]
6. OPERATING INSTRUCTIONS
ATTENTION
- Operate the dehumidifier only in the upright position.
- Plug in to a standard outlet with the correct voltage and amperage for the unit.
- Allow five minutes before restarting after the unit shuts off for any reason. This will avoid damaging the compressor.
- Check dehumidifier daily for correct operation.
- Protect floor surfaces from water.
Please proceed as follows to start using this dehumidifier:
After transported, the dehumidifier should be allowed to stand for 30 minutes. This procedure is recommended
to extend the compressor’s operating lifetime.
Put the plug into the socket.
Check that the water tank is in position.
The control panel must be illuminated after plugging in the unit to the mains.
Set the electronic humidistat to the desired humidity level.
Check for the proper operation of both fan and compressor before leaving the unit unattended.

17 [EN]
7. ELECTRONIC CONTROL
This unit is equipped with an electronic control system. The individual LEDs and corresponding symbols have the
following meaning:
1 - ON/OFF key (standby key) to switch the
dehumidifier on and off
4 - +/- key for setting the target humidity value
2 - Operation indicator - LED lights up when the
dehumidifier is connected to the power supply.
5 - TANK indicator LED lights up -> tank full
3 - SET key to change the operating modes in the
special menu
6 - Display to show actual/desired
humidity/operating modes
1) On/off key
Switches the machine on or off (standby mode).
2) LED “ON”
The “ON” LED lights up when the unit is supplied with mains voltage.
Attention: Before working on the unit, pull the mains plug.
3) SET key
You can change the menus in the special menu with the Set key.
4) Control for the relative air humidity
Use the “+ % RH” and “- % RH” keys to set the desired relative humidity.
If one of the keys is pressed, the display changes from displaying the ACTUAL humidity to displaying the SET humidity.
Once the desired target humidity is set, the display changes back to the current ACTUAL humidity after a short time (3
seconds).
A SET value of 31-90 % relative humidity can be set. When the desired humidity is reached, the unit switches off
automatically.
The unit switches on at a difference of +1 between desired and actual value and switches off at a difference of -2. The
compressor has a minimum running and pause time of 1 minute, therefore it can switch on with a time delay.
If a SET value of 30 % relative humidity is set, the unit runs in continuous operation and does not switch off even after
the set value has been reached!
5) LED “Water tank full”
If the “FULL” LED lights up, the water tank is either full or not correctly inserted.
The unit then automatically stops operating.
2
1
3
4
5
6

18 [EN]
Empty the tank and make sure that it is correctly inserted in the machine. After a short delay, the unit will resume
operation.
If the tank is removed during operation, a beep is heard and the unit stops operating.
6) Display
The display shows the current ACTUAL humidity as standard.
If the desired SET humidity is changed, the display shows the set SET humidity.
If there is an interruption in the transmission of the radio humidity transmitter (optional accessory) to the unit, the code
“05” is displayed.
If the unit was disconnected from the mains, the software version is displayed the first time the unit is switched on.
After a short time, the display automatically switches back to showing the ACTUAL humidity.
7) Further setting options
-Operation with the radio humidity transmitter (optional accessory)
Optionally the unit can be equipped with a radio humidity transmitter.
The radio humidity transmitter must be coupled to the unit. See item “Special menu”.
If the connection between the dehumidifier and the radio humidity transmitter is disturbed (e.g. no radio reception
for 10 minutes), the display shows “05”. Please note that each time the unit is switched on, the connection must
first be established and “05” is also shown in the display until the first valid radio signal is received.
-Key lock
To prevent accidental settings and to protect the unit from unauthorised access, the unit has a key lock.
To activate the key lock, press and hold the “+ % RH” and “- % RH” keys simultaneously for 6 seconds. The
display shows “88” during activation and for 3 seconds after activation.
To release the key lock, repeat the procedure and press the “+ % RH” and “- % RH” keys simultaneously for 6
seconds.
If you press a key when the keylock is active, the display shows “88”.
-Special menu
In this menu, you can make special settings such as the coding of the radio humidity transmitter.
To activate this menu, please proceed as follows. Switch the machine off with the on/off key (1).
Now press the on/off key and hold it down for 5 seconds. The display shows Ad.
You can now switch to other sub-menus by pressing the “Set” key. You can change the settings in the menus with
the plus/minus key.