Rohnson R-9424 User manual

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Home Dehumidifier
User Manual
Original instructions
R-9424
(With R290 refrigerant)

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CONTENT
1. BEFORE YOU BEGIN...................................................................................................................................................... 3
1.1 PRODUCT DESCRIPTION ................................................................................................................................... 3
1.2SYMBOLS FROM THE UNIT AND USER MANUAL............................................................................................. 3
2. FOR YOUR SAFETY ........................................................................................................................................................ 5
2.1 OPERATIONALPRECAUTIONS........................................................................................................................ 5
2.2 SAFETY PRECAUTIONS ON SERVICING .......................................................................................................... 7
2.2.1 Checks to the area.................................................................................................................................. 7
2.2.2 Work procedure ...................................................................................................................................... 7
2.2.3 General work area .................................................................................................................................. 7
2.2.4 Checking for presence of refrigerant ................................................................................................... 7
2.2.5 Presence of fire extinguisher................................................................................................................. 7
2.2.6 No ignition sources ................................................................................................................................. 7
2.2.7 Ventilated area ........................................................................................................................................ 7
2.2.8 Checks to the refrigeration equipment ................................................................................................ 7
2.2.9 Checks to electrical devices................................................................................................................... 8
3. INSTALLATION............................................................................................................................................................... 9
3.1 LOCATION............................................................................................................................................................ 9
3.2 OPERATING THE DEVICE SAFELY .................................................................................................................. 10
4. PRODUCT OVERVIEW ................................................................................................................................................. 11
4.1 FRONT VIEW ..................................................................................................................................................... 11
4.2 FEATURES .......................................................................................................................................................... 12
4.3 SPECIFICATIONS .............................................................................................................................................. 12
5. OPERATION .................................................................................................................................................................. 13
5.2 SETTINGS........................................................................................................................................................... 14
5.3 SETTINGS INDICATOR LIGHT ........................................................................................................................ 15
6. ANNOUNCEMENTS....................................................................................................................................................... 16
7. MAINTENANCE ............................................................................................................................................................. 17

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8. TROUBLESHOOTING ................................................................................................................................................... 18
9. SAFETY WARNING....................................................................................................................................................... 19

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1. BEFORE YOU BEGIN
1.1 PRODUCT DESCRIPTION
The dehumidifier is used to remove excessive moisture from the air. The resulting reduction
in relative humidity protects buildings and their contents from the adverse effects of excess
humidity.
The environmentally friendly R290 is used as the refrigerant. R290 has no damaging
influence on the ozone layer (ODP), a negligible greenhouse effect (GWP) and is available
worldwide. Because of its efficient energy properties, R290 is highly suitable as a coolant
for this application. Special precautions must be taken into consideration due to the
coolant's high flammability.
1.2SYMBOLS FROM THE UNIT AND USER MANUAL
warning
This unit uses a flammable refrigerant.
If refrigerant leaks and comes in contact with fire or heating part, it
will create harmful gas and there is risk of fire.
Read the USER MANUAL carefully before operation.
Further information is available in the USER MANUAL, SERVICE
MANUAL, and the like.
Service personnel are required to carefully read the USER MANUAL
and SERVICE MANUAL before operation.

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THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
⚫This appliance is intended to be used by expert or trained users in shops, in light
industry and on farms, or for commercial use by lay persons.
⚫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.
⚫The unit is designed only for use with R-290(propane) gas as the designated
refrigerant.
⚫The refrigerant loop is sealed. Only a qualified technician should attempt to
service!
⚫Do not discharge the refrigerant into the atmosphere.
⚫R-290 (propane) is flammable and heavier than air.
⚫It collects first in low areas but can be circulated by the fans.
⚫If propane gas is present or even suspected, do not allow untrained personnel to
attempt to find the cause.
⚫The propane gas used in the unit has no odor.
⚫The lack of smell does not indicate a lack of escaped gas.
⚫If a leak is detected, immediately evacuate all persons from the store, ventilate the
room and contact the local fire department to advise them that a propane leak has
occurred.
⚫Do not let any persons back into the store until the qualified service technician has
arrived and that technician advises that it is safe to return to the store.
⚫No open flames, cigarettes or other possible sources of ignition should be used inside

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or in the vicinity of the units.
⚫Component parts are designed for propane and non-incentive and non-sparking.
Component parts shall only be replaced with identical repair parts.
FAILURE TO ABIDE BY THIS WARNING COULDRESULT IN AN EXPLOSION, DEATH,
INJURY ANDPROPERTY DAMAGE.

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2. FOR YOUR SAFETY
Your safety is the most important thing we concerned!
2.1 OPERATIONALPRECAUTIONS
WARNING- to reduce the risk of fire, electric shock or injury to persons or property:
◼If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.
◼The A-weighted sound pressure level is below 42 dB.
◼The appliance shall be disconnected from its power source during maintenance.
◼Always operate the unit from a power source of equal voltage, frequency and rating as
indicated on the product identification plate.
◼Always use a power outlet that is grounded.
◼Unplug the power cord when cleaning or when not in use.
◼Do not operate with wet hands. Prevent water from spilling onto the unit.
◼Do not immerse or expose the unit to rain, moisture or any other liquid.
◼Do not leave the unit running unattended. Do not tilt or turn over the unit.
◼Do not unplug while the unit is operating.
◼Do not unplug by pulling on the power cord.
◼Do not use an extension cord or an adapter plug.
◼Do not put objects on the unit.
◼Do not climb or sit on the unit.
◼Do not insert fingers or other objects into the air outlet.
◼Do not touch the air inlet or the aluminum fins of the unit.
WARNING
Please read this manual carefully and fully understand before
operating your dehumidifier.

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◼Do not operate the unit if it is dropped, damaged or showing signs of product malfunction.
◼Do not clean the appliance with any chemicals.
◼Ensure the unit is far away from fire, inflammable, or explosive objects.
◼The unit shall be installed in accordance with national wiring regulations.
◼Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacture.
◼The appliance shall be stored in a room without continuously operation sources (for
example: open flames, an operating gas appliance or an operating electric heater).
◼The appliance shall be stored so as to prevent mechanical damage from occurring.
◼Do not piece or burn, even after use.
◼Be aware that refrigerants may not contain an odour.
◼Pipe-work shall be protected from physical damage and shall not be installed in an
unventilated space, if that space is smaller than 8 m².
◼Compliance with national gas regulations shall be observed.
◼Keep any required ventilation openings clear of obstruction.
◼The appliance shall be stored in a well-ventilated area where the room size corresponds to
the room area as specified for operation.
WARNING
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 an
industry, recognized assessment specification.
WARNING
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.
If you don't understand something or need help, please contact the dealer services.

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2.2 SAFETY PRECAUTIONS ON SERVICING
Please follow these warnings when to undertake the following when servicing a dehumidifier with
R290.
2.2.1 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.
2.2.2 Work procedure
Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable
gas or vapor being present while the work is being performed.
2.2.3 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.
2.2.4 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. no sparking, adequately
sealed or intrinsically safe.
2.2.5 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.
2.2.6 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.
2.2.7 Ventilated area
Ensure that the area is in the open or that it is adequately ventilated before breaking into
thesystem or conducting any hot work. A degree of ventilation shall continue during the period that

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the work is carried out. The ventilation should safely disperse any released refrigerantand
preferably expel it externally into the atmosphere.
2.2.8 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 forthe
presence of refrigerant;
–Marking to the equipment continues to be visible and legible. Markings and signs that areillegible
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.
2.2.9 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 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:
-those 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, recover ignore
purging the system;
-that there is continuity of earth bonding.