Johnny Vac JVDHUM190 User manual

USER GUIDE
JVDHUM190
Commercial Dehumidier

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All units sold by Johnny Vac have a user manual that is an integral part of the device
sold. Please read this instruction manual carefully before using your device. Photos are
included in this manual to help you visualize the informations.
In addition to the great service this device can provide, taking the following precautions
will only improve your performance with less effort. This guide provides you with excel-
lent information to help you:
• To identify and recognize the specificities of the JVDHUM190;
• To use the device in complete safety and in the best possible conditions;
• To maintain the device periodically for maximum performance;
• To find out what parts you might need and order them from Johnny Vac.
PROTECT THE ENVIRONMENT
The materials used for packaging your unit as well as used parts, batteries and their
liquids such as oil or antifreeze must always be collected and recycled, or taken to the
appropriate disposal sites in accordance with the laws in force in your area.
PROTECT THE ENVIRONMENT
Please dispose of the materials,
parts of old appliances and
batteries according to the
regulations in force in accordance
with the environmental protection
methods.
Remember to recycle as many
parts as possible.
MACHINE DATA
Please fill this form at the time of installation
for future references.
Model No: ___________________________
Serial No: ____________________________
Installation Date: ______________________

Loremipsum
CONTENTS
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Before Starting..................................................... 4
• 1.1 PRODUCT DESCRIPTION...............................................4
• 1.2 Symbols from the unit and user manual ........................4
Safety Precautions ........................................ 5 - 9
• 2.2 SAFETY PRECAUTIONS DURING SERVICING................7
• 2.2.1 Area Checks ................................................................7
• 2.2.2 Work Procedure ..........................................................7
• 2.2.3 General Work Area ......................................................8
• 2.2.4 Refrigerant Presence Check ........................................8
• 2.2.5 Presence Of Fire Extinguisher .....................................8
• 2.2.6 Avoiding Ignition Sources ...........................................8
• 2.2.7 Ventilated Area ............................................................8
• 2.2.8 Checks On Refrigeration Equipment............................8
• 2.2.9 Checks To Electrical Devices .......................................9
Specications .................................................... 10
Components................................................11 - 12
Control Panel ................................................... 13
Device Operation ........................................14 - 15
Auto Drainage And Maintenance ...................... 16
Troubleshooting Guide....................................... 17

BEFORE STARTING
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1.1 PRODUCT DESCRIPTION
This dehumidifier removes moisture from rooms commonly found in basements, warehouses and
many other locations. The environmentally friendly refrigerant R32 is used, which has no
damaging influence on the ozone layer (ODP) and a negligible greenhouse effect (GWP). It is
widely available worldwide. R32 is highly suitable for this application due to its efficient energy
properties. However, precautions must be taken into consideration due to the flammability of the
refrigerant.
1.2 Symbols From The Unit And User Manual
Warning:
This unit uses a flammable refrigerant.
If the refrigerant leaks and comes into contact with fire or heating parts, it will
produce harmful gas and pose a fire risk. It is essential to read the USER MANUAL
carefully before operating the dehumidifier.
For further information, refer to the USER MANUAL, SERVICE MANUAL, and similar resources.
Service personnel are required to carefully read the USER MANUAL and SERVICE MANUAL before
operating the dehumidifier.

THE FOLLOWING SAFETY PRECAUTIONS
SHOULD ALWAYS BE OBSERVED:
• This appliance can be used by children aged 8 years and above, as well as individuals with reduced
physical, sensory, or mental capabilities, or those lacking experience and knowledge, if they have
been given proper supervision or instructions on how to use the appliance safely and understand the
associated hazards. Children should not play with the appliance, and cleaning or maintenance should
not be performed by children without supervision.
• This appliance is designed for indoor use only and should not be used outdoors.
• The unit is designed to work exclusively with R32 (propane) gas as the designated refrigerant.
• The refrigerant loop is sealed, and only a qualified technician should attempt to service it.
• Do not release the refrigerant into the atmosphere.
• R32 (propane) is flammable and heavier than air. It tends to collect in low areas but can be circulated
by fans.
• If propane gas is present or suspected, untrained personnel should not attempt to locate the source.
• The propane gas used in the unit has no odor. The absence of smell does not indicate the absence of
a gas leak.
• If a leak is detected, immediately evacuate all individuals from the premises, ventilate the area, and
contact the local fire department to report a propane leak.
• Do not let any persons back into the room until the qualified service technician has arrived and the
technician advises that it is safe to return to the room.
• No open flames, cigarettes, or other possible sources of ignition should be used inside or in the
vicinity of the units.
• Component parts are designed for propane and are non-incendiary and non-sparking. Component
parts should only be replaced with identical repair parts.
• FAILURE TO ABIDE BY THIS WARNING COULD RESULT IN AN EXPLOSION, DEATH, INJURY, AND
PROPERTY DAMAGE.
SAFETY PRECAUTIONS
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FOR YOUR SAFETY - WARNING
Please read this manual carefully and fully understand it before operating your
appliance.
SAFETY PRECAUTIONS
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• 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 appliance should be disconnected from its power source during service.
• Always operate the unit from a power source with the same voltage, frequency, and rating as
indicated on the product identification plate.
• Always use a grounded power outlet.
• Unplug the power cord when cleaning or when the appliance is not in use.
• Do not operate the appliance with wet hands. Prevent water from spilling onto the unit.
• Do not immerse or expose the appliance to rain, moisture, or any other liquid.
• Do not leave the appliance running unattended. Do not tilt or turn over the unit.
• Do not unplug the appliance while it is operating.
• Do not unplug the appliance by pulling on the power cord.
• Do not use an extension cord or an adapter plug.
• Do not place 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.
• Do not operate the unit if it has been dropped, damaged, or shows signs of product malfunction.
• Do not clean the appliance with any chemicals.
• Ensure that the unit is kept far away from fire, inflammable, or explosive objects.
• The unit should be installed in compliance with national wiring regulations.
• Only use the recommended methods for defrosting and cleaning the appliance, and avoid any other
means.
• Store the appliance in a room without any continuously operating sources, such as open flames,
operating gas appliances, or operating electric heaters.
• Store the appliance in a way that prevents any mechanical damage.
• Do not puncture or burn the appliance, even after use.
• Please note that refrigerants may not have an odor.
• Protect the pipe-work from physical damage and avoid installing it in an unventilated space smaller
than 4 m².
• Ensure compliance with national gas regulations.
• Keep all required ventilation openings clear and free from obstructions.
• Store the appliance in a well-ventilated area that meets the specified room area requirements for
operation.

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SAFETY PRECAUTIONS
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• 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 appliance should be disconnected from its power source during service.
• Always operate the unit from a power source with the same voltage, frequency, and rating as
indicated on the product identification plate.
• Always use a grounded power outlet.
• Unplug the power cord when cleaning or when the appliance is not in use.
• Do not operate the appliance with wet hands. Prevent water from spilling onto the unit.
• Do not immerse or expose the appliance to rain, moisture, or any other liquid.
• Do not leave the appliance running unattended. Do not tilt or turn over the unit.
• Do not unplug the appliance while it is operating.
• Do not unplug the appliance by pulling on the power cord.
• Do not use an extension cord or an adapter plug.
• Do not place 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.
• Do not operate the unit if it has been dropped, damaged, or shows signs of product malfunction.
• Do not clean the appliance with any chemicals.
• Ensure that the unit is kept far away from fire, inflammable, or explosive objects.
• The unit should be installed in compliance with national wiring regulations.
• Only use the recommended methods for defrosting and cleaning the appliance, and avoid any other
means.
• Store the appliance in a room without any continuously operating sources, such as open flames,
operating gas appliances, or operating electric heaters.
• Store the appliance in a way that prevents any mechanical damage.
• Do not puncture or burn the appliance, even after use.
• Please note that refrigerants may not have an odor.
• Protect the pipe-work from physical damage and avoid installing it in an unventilated space smaller
than 4 m².
• Ensure compliance with national gas regulations.
• Keep all required ventilation openings clear and free from obstructions.
• Store the appliance in a well-ventilated area that meets the specified room area requirements for
operation.
FOR YOUR SAFETY - WARNING
Any person involved in working on or accessing a refrigerant circuit must possess
a valid certicate from an industry-accredited assessment authority. This
certicate should conrm their competence in handling refrigerants safely, in
accordance with an industry-recognized assessment specication.
FOR YOUR SAFETY - WARNING
Servicing should only be performed as recommended by the equipment
manufacturer. Maintenance and repair tasks that require the help of other
qualied personnel should be carried out under the supervision of an individual
who is competent in handling ammable refrigerants.
2.2 SAFETY PRECAUTIONS DURING SERVICING
Please adhere to the following warnings and precautions when servicing an appliance with R32:
2.2.1 Area Checks
Before starting work on systems containing flammable refrigerants, safety checks must be conducted
to minimize the risk of ignition. Prior to performing any work on the refrigerating system, the following
precautions should be taken:
2.2.2 Work Procedure
All work should be carried out following a controlled procedure to minimize the presence of flammable
gases or vapors.
2.2.3 General Work Area
All maintenance staff and individuals working in the vicinity should be informed about the nature of the
work being carried out. It is important to avoid working in confined spaces. The work area should be
cordoned off, and measures should be taken to ensure the safety of the area by controlling flammable
materials.
2.2.4 Refrigerant Presence Check
An appropriate refrigerant detector should be used to check the area before and during work to identify
potentially flammable atmospheres. Make sure that the leak detection equipment being used is suitable
for flammable refrigerants, meaning it should not produce sparks, be adequately sealed, or be
intrinsically safe.
2.2.5 Presence Of Fire Extinguisher
If any hot work is to be performed on the refrigeration equipment or any associated parts, appropriate
fire extinguishing equipment must be readily available. It is advised to have a dry powder or CO2 fire
extinguisher positioned near the charging area.
2.2.6 Avoiding Ignition Sources
Any individual conducting work related to a refrigeration system that involves exposing pipes containing
or having contained flammable refrigerants must not use any sources of ignition that may pose a risk of
fire or explosion. All potential ignition sources, including cigarette smoking, should be kept at a
sufficient distance from the installation, repair, removal, and disposal sites where flammable
refrigerants may be released into the surrounding space. Prior to commencing work, the equipment
area should be inspected to ensure there are no flammable hazards or ignition risks. "No Smoking" signs
must be prominently displayed.
2.2.7 Ventilated Area
Before breaking into the system or performing any hot work, ensure that the area is either open or
adequately ventilated. Sufficient ventilation should be maintained throughout the duration of the work
to safely disperse any released refrigerant, preferably by expelling it externally into the atmosphere.
2.2.8 Checks On Refrigeration Equipment
When replacing electrical components, ensure that they are suitable for the intended purpose and meet
the correct specifications. Always follow the manufacturer's maintenance and service guidelines. If
there are any uncertainties, consult the manufacturer's technical department for assistance.

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JVDHUM190
SAFETY PRECAUTIONS
User Guide
2.2 SAFETY PRECAUTIONS DURING SERVICING
Please adhere to the following warnings and precautions when servicing an appliance with R32:
2.2.1 Area Checks
Before starting work on systems containing flammable refrigerants, safety checks must be conducted
to minimize the risk of ignition. Prior to performing any work on the refrigerating system, the following
precautions should be taken:
2.2.2 Work Procedure
All work should be carried out following a controlled procedure to minimize the presence of flammable
gases or vapors.
2.2.3 General Work Area
All maintenance staff and individuals working in the vicinity should be informed about the nature of the
work being carried out. It is important to avoid working in confined spaces. The work area should be
cordoned off, and measures should be taken to ensure the safety of the area by controlling flammable
materials.
2.2.4 Refrigerant Presence Check
An appropriate refrigerant detector should be used to check the area before and during work to identify
potentially flammable atmospheres. Make sure that the leak detection equipment being used is suitable
for flammable refrigerants, meaning it should not produce sparks, be adequately sealed, or be
intrinsically safe.
2.2.5 Presence Of Fire Extinguisher
If any hot work is to be performed on the refrigeration equipment or any associated parts, appropriate
fire extinguishing equipment must be readily available. It is advised to have a dry powder or CO2 fire
extinguisher positioned near the charging area.
2.2.6 Avoiding Ignition Sources
Any individual conducting work related to a refrigeration system that involves exposing pipes containing
or having contained flammable refrigerants must not use any sources of ignition that may pose a risk of
fire or explosion. All potential ignition sources, including cigarette smoking, should be kept at a
sufficient distance from the installation, repair, removal, and disposal sites where flammable
refrigerants may be released into the surrounding space. Prior to commencing work, the equipment
area should be inspected to ensure there are no flammable hazards or ignition risks. "No Smoking" signs
must be prominently displayed.
2.2.7 Ventilated Area
Before breaking into the system or performing any hot work, ensure that the area is either open or
adequately ventilated. Sufficient ventilation should be maintained throughout the duration of the work
to safely disperse any released refrigerant, preferably by expelling it externally into the atmosphere.
2.2.8 Checks On Refrigeration Equipment
When replacing electrical components, ensure that they are suitable for the intended purpose and meet
the correct specifications. Always follow the manufacturer's maintenance and service guidelines. If
there are any uncertainties, consult the manufacturer's technical department for assistance.

SAFETY PRECAUTIONS
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JVDHUM190 User Guide
The following checks should be conducted for installations using ammable
refrigerants:
- The refrigerant charge size is appropriate for the size of the room where the refrigerant-containing
parts are installed.
- The ventilation machinery and outlets are functioning properly and are not obstructed.
- If an indirect refrigerating circuit is employed, the secondary circuit should be checked for the presence
of refrigerant.
- Equipment markings should remain visible and legible. Any illegible markings or signs should 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, recovering or purging
the system;
- that there is continuity of earth bonding
FOR YOUR SAFETY - WARNING
Install the unit in rooms which exceed 4 m².
Do not install the unit in a place where inammable gas may leak.
NOTE!
The manufacture may provide other suitable example or may provide additional
information about the refrigerant odour.

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JVDHUM190 User Guide
SPECIFICATIONS
DEHUMIDIFIER
Model : JVDHUM190
Voltag e & Hertz: AC115V / 60Hz
Rated Input Current: 6.8A @80°F, 60% RH
MAX. Input Current: 8.5A
Refrigerant Charge: R32/13.06oz
Dehumidify Capacity: - 95 Pints/Day @80°F, 60% RH
- 190 Pints/Day @95°F, 80% RH
Maximum Design Pressure: - High Side: 550 psig
- Low Side: 260 psig
BCSC: 15A
Compressor Input: - RLA: 6.15A
- LRA: 36A
Fan Motor Power: 1.55A / 0.241HP
CONFORMS TO UL
STD.60335-1&60335-2-40
CERTIFIED TO CSA
STD.60335-1&60335-2-40
FEATURES
* Hot Gas Valve system for fast defrost
* Easy assembly and disassembly of the housing for repair
* Convenient assembly and disassembly with fast connector for hose
* Foldable handle for easy operation
* Quick access to the pump in the front for easy servicing
* Durable semi-pneumatic wheels

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JVDHUM190 User Guide
COMPONENTS
Quick pump
access
Air-inlet
grille
Foldable
Handle
Wheel
FRONT

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JVDHUM190 User Guide
COMPONENTS
Winder
Label Area
Water Hose
Connector
Control
Panel
Latch
Air
Outlet
BACK

CONTROL PANEL
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JVDHUM190 User Guide
43 5 62
1
1
7
8
ADD BUTTON
2WATER FULL INDICATOR
3PURGE BUTTON (MANUAL DRAINAGE)
4POWER BUTTON
5TIMING BUTTON
6DEFROSTING INDICATOR
7MINUS BUTTON
8DISPLAY SCREEN

Power Button:
When the machine is in standby mode, only the running time indicators will illuminate with dim LED
lights, as shown in the picture below.
To start the dehumidifier, press the Power Button . At the same time, all the indicators on the
Display Screen will illuminate (refer to the picture below) and the unit will operate in Auto
mode with a default humidity setting of 10%RH. The machine will start running if the humidity
conditions meet the requirement for compressor operation.
To turn off the machine, press the Power Button again. The fan will shut down 1 minute later.
Timing Button: Press the timing button to display the current timing data on the screen.
Use the
Add Button to increase the timing data or the Minus Button to decrease it. Each
press will adjust the timing by one hour. The timing indicator will illuminate after setting.
When the machine is in standby mode, press the
Timing Button to set the startup time. When
the machine is already running, press the timing button to set the shutdown time.
Timing setting range is from 0 to 24 hours. If you set the timing data as "00," it will cancel the timing
function, and the timing indicator will turn off.
Add Button: Press the Add button to increase the humidity data or timing data.
When setting the humidity data, each press of the button will increase it by 5%RH. The humidity
range can be set from 10% to 90% RH, with each step being 5% RH. The cycle for humidity settings
is as follows: 10% - 15% - 20% - 25% - 30% - 35% - 40% - 45% - 50% - 55% - 60% - 65% - 70%
- 75% - 80% - 85% - 90% - 10%...
When setting the timing data, each press of the button will increase it by 1 hour. The timing range
can be set from 1 to 24 hours, with each step being 1 hour. The cycle for timing settings is as
follows: 01 - 02 - 03 - 04 - 05... - 23 - 24 - 00 - 01 - 02...
DEVICE OPERATION
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JVDHUM190 User Guide
4
5
1
1
7
5
4
4
8

DEVICE OPERATION
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JVDHUM190 User Guide
Minus Button :
Press the Minus button to decrease the humidity data or timing data.
When setting the humidity data, each press of the button will decrease it by 5%RH. The humidity range
can be set from 90% to 10% RH, with each step being 5% RH. The cycle for humidity settings is as
follows: 90% - 85% - 80% - 75% - 70% - 65% - 60% - 55% - 50% - 45% - 40% - 35% - 30% - 25% -
20% - 15% - 10% - 90%...
When setting the timing data, each press of the button will decrease it by 1 hour. The cycle for timing
settings is as follows: 24 - 23 - 22 - 21 - 20... - 02 - 01 - 00 - 24 – 23...
24 - 23 - 22 - 21 - 20 - ... - 02
- 01 - 00 - 24 - 23...
Purge Button (Manual Drainage): Press and hold the purge button for 3 seconds to activate
the built-in pump for automatic water drainage. The pump will stop draining after 30 seconds, and the
indicator will turn off.
Defrosting Indicator: When the machine is in the defrosting process, this indicator turns on. It
will turn off after the defrosting is completed.
Water Full Indicator: When the water pump is full, the indicator light turns on to alert the user
to drain the water.
Display Screen: By default, the temperature is displayed in Fahrenheit. To switch to Celsius
temperature, press and hold the power button for 5 seconds. While the machine is running, the display
screen shows the temperature and humidity of the inlet and outlet air. In running mode, it also displays
the running time. When users are in the setting mode, it shows the timing and humidity data being set.
Memory Function: In case of a power outage or if the unit shuts off, it will automatically restart with
the default humidity setting of 10%RH once power is restored.
Note :
- When the humidity of the air inlet is equal to or exceeds the setting humidity data +3%RH, and
the compressor is not in a 3-minute delay start protection period, the fan will start immediately,
and the compressor will start 3 seconds later.
- When the humidity of the air inlet is equal to or lower than the setting humidity data -3%RH, the
compressor will stop working immediately, and the fan will stop working 1 minute later.
7
3
6
2
8

AUTO DRAINAGE AND MAINTENANCE
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JVDHUM190 User Guide
Please disconnect the power supply before cleaning or conducting maintenance.
Cleaning:
- Use a soft damp cloth to clean the unit body. Do not submerge or pour water onto the unit or control panel
as it may damage the electronic components.
- Avoid using chemical solvents such as benzene, alcohol, gasoline, or other heavy-duty cleaners, as they
may cause surface damage or deformation.
Cleaning The Air Filter:
Step 1: Gently pull out the air lter.
Step 2: Use a vacuum cleaner to remove dirt from the surface of the air lter. If the lter is heavily soiled, you
can gently immerse it in warm water (around 40°) with a neutral detergent, rinse it thoroughly, and let it dry
completely.
Step 3: Insert the lter back into the unit.
Dehumidier Storage:
1. Press the purge button to drain the water before transporting or storing the machine.
2. During transportation and storage, keep the machine in an upright position.
3. When storing multiple machines in a warehouse, stack them to save space while ensuring stability
and preventing damage.
3

TROUBLESHOOTING GUIDE
Trouble Possible Cause Solution
Error Code : E1 Failure of copper head sensor Replace the sensor
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JVDHUM190 User Guide
Error Code : E2 Failure of air inlet temperature and Replace the sensor
humidity sensor
Error Code : E3 Failure of air outlet temperature and Replace the sensor
humidity sensor
Error Code : E4 Failure of the water pump or Replace the pump or
water tank is full check the water tank
Error Code : E5 Failure of the 4-way valve Replace the valve
Cautions:
If the unit malfunctions, immediately turn off the unit and unplug it.
Please contact your distributor for service-related issues.

JVDHUM190 - User Guide - 2023
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before having spoken with us.
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