CorroVenta A15ES User manual

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USER MANUAL
ADSORPTION DEHUMIDIFIER
A15ES

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Table of Contents
Intended use........................................................................................................................................ 4
Introduction......................................................................................................................................... 4
Manufacturing directive...................................................................................................................... 5
Safety information............................................................................................................................... 6
Product Overview................................................................................................................................ 7
Main components of the machine .................................................................................................. 7
Name plate...................................................................................................................................... 9
Other labels and markings............................................................................................................... 9
Dehumidification theory and methods............................................................................................. 11
Relative humidity and its effect on substances............................................................................. 11
How to select dehumidifier type................................................................................................... 11
How the dehumidifier works......................................................................................................... 12
Transport and lift............................................................................................................................... 13
Delivery inspection, inspection after transport/lift........................................................................... 14
Storage .............................................................................................................................................. 14
Installation......................................................................................................................................... 14
Start and stop the machine............................................................................................................... 16
Emergency stop................................................................................................................................. 17
Adjusting air flow balance................................................................................................................. 18
Filter monitoring................................................................................................................................ 21
Control panel menu and functions.................................................................................................... 23
Control Modes and Hysteresis .......................................................................................................... 34
Alarms................................................................................................................................................ 35
To network machines........................................................................................................................ 38
Service Reminder........................................................................................................................... 38
Service and Maintenance.................................................................................................................. 39
Filter replacement......................................................................................................................... 40
Service and repair work including cleaning................................................................................... 40
Accessories and consumables........................................................................................................... 42
Trouble shooting ............................................................................................................................... 43
Technical data ................................................................................................................................... 45
APPENDIX 1. WIRING DIAGRAM........................................................................................................ 46

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User Manual A15 ES
Intended use
The A15 ES is intended, and shall only be used for, dehumidification of air indoors and at normal
atmospheric pressure. The machine is not to be used in environments where combustible gases can
be present.
Other use of the A15 ES, including use in violation of the instructions and restrictions of this manual,
may result in personal injury and/or damage to equipment and property
Introduction
The adsorption dehumidifier A15 ES is developed for construction drying and drying of water
damages. The machine is of four-hole type and has a separate regeneration air flow allowing outdoor
air to be used for regeneration if that is preferrable for energy efficiency or for minimized effect on
air indoor air pressure. For maximal flexibility in the installation, the machine is equipped with stubs
allowing easy attachment of hoses or pipes for the respective air flows.
By use of the control panel, the user can adjust and optimize the operation of the A15ES to the work
to be undertaken, controlling the operation of the fan and selection of proper control mode using
either the built-in or an external RHT sensor.
The A15 ES is also compatible with the SuperVision™ and can thus be remotely operated and
controlled through use of smart phone, PC or tablet. The SuperVision™ collects and stores
measurement data and allows the user easily to create the graphs required for progress analysis
during the project as well as a complete and comprehensive report of entire project once it is
competed.
The machine exterior is made from stainless steel for durability and to maintain a proper appearance
even after numerous transports and installations. Its limited dimensions allow for the machine to be
transported on a standard EUR-pallet and for it to pass through standard doors which is important
for construction as well as water damage restoration use.
•High capacity
•Chassis made from stainless steel
•Energy efficient
•Digital control panel
•Robust
•kWh and hour counter –resettable work counters
•Easily maintained
•Compatible with SuperVision™

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Manufacturing directive
A15 ES is CE approved.
The machine is manufactured in Bankeryd, Sweden, by Corroventa Avfuktning AB. The company is
ISO 9001 certified.
Waiver of Liability
•Faulty, incorrect installations and/or incorrect use can cause damage to property and human
injury.
•The manufacturer assumes no responsibility or liability for damages or injuries caused by
non-compliance with the instructions herein, use for other purposes than the intended, or
failure to observe its warnings. Such damage, injuries or liabilities are not covered by the
product warranty.
•The product warranty does not cover consumables or normal wear and tear.
•It is the responsibility of the buyer to inspect the product at time of delivery and before use
to ensure its good function. The product warranty does not cover damage resulting from use
of faulty products.
•Changes or modifications to the equipment must not be made without written consent by
Corroventa Avfuktning AB.
•The product, technical data and/or installation and operation instructions can be changed
without prior notice.
•This manual contains information that is protected by the Intellectual Property laws. No part
of this manual may be copied, stored in an information system or transferred in any form or
in any way without the written consent of Corroventa Avfuktning AB.
Any comments on the contents of this document shall be sent or addressed to:
Corroventa Avfuktning AB Tel [phone]
Mekanikervägen 3 Fax [phone]
564 35 Bankeryd, SWEDEN E-post [e-mail]

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Safety information
The appliance is not to be used by persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction
Children shall be supervised to ensure they do not to play with the appliance.
Electrical installations made in connection with the installation of the A15 ES shall be made by
authorized and qualified personnel in accordance with local and national regulations.
Furthermore, the following warnings and instructions shall be read and observed:
1. The dehumidifier is intended for indoor use only and for dehumidification of air at normal
atmospheric pressure.
2. The dehumidifier must not be powered until the installation is finished in accordance with
this manual.
3. The powered dehumidifier must not be covered as this can lead to overheating and fire
hazard.
4. The dehumidifier must not be used as table, trestle, pallet or stool.
5. The dehumidifier must not be used to step or stand on or used as table, trestle pallet or
stool.
6. Never use the dehumidifier without the filter installed as this can cause damage to it. Ensure
that the filters are clean as cluttered filters can cause the dehumidifier to overheat.
7. Bases or organic material with high boiling point such as oil, fat, solvents, boracol or similar
substances must not be drawn into the dehumidifier. It may damage the rotor.
8. The dehumidifier must not be used in spaces where combustible or explosive gases can be
present, neither in the ambient air nor in the air flows through the machine.
9. Do not stick objects into the air outlets or intakes as this can cause damage to the machinery
as well as human injury.
10. Install the dehumidifier steadily and leveled so that it cannot fall over.
11. Keep children, animals and spectators away from the workplace while installation is
undertaken.
12. If the dehumidifier is broken, if the power connector or the cable is damaged, contact the
retailer. Do not repair the equipment if you have not received specific training by the
manufacturer.
13. Be careful not to damage the power cable. The cable must not go through water or pass
sharp edges.
14. Never carry or tow the dehumidifier by its cable or power intake.
15. To use electrical equipment in humid or wet environment can be dangerous. Never power
the dehumidifier if it is standing in water.
16. The dehumidifier must only be connected to grounded power outlet with voltage and
frequency in accordance with dehumidifier nameplate.
17. A residual-current device / ground fault circuit interrupter should be used to minimize the
risk of electric shocks.
18. Water must not come in contact with the electrical components of the equipment. If this has
happened, ensure that the equipment is dry before it is used and powered again.
19. The power must always be disconnected before the dehumidifier is opened.
20. Repairs and maintenance of the electronics and the electrical system of the dehumidifier
must only be made by qualified electrician.
21. All work with the machine, including installation as well as repair and service shall be
performed using all the personal protective equipment appropriate for the given task.

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22. If the machine is in an elevated position, the rotor cassette must not be extracted as this will
shift the center of gravity and potentially cause the machine to fall over. In elevated
positions, the support integrated with the rotor cassette will not reach floor or other
supporting surface and will thus not help prevent accident.
23. Wet air hose/pipe that is used and connected to the dehumidifier must be corrosion-
resistant and able to withstand 80°C heat.
24. The machine weighs more than 160kg and is too heavy to be lifted manually.
25. For transport and lift of the machine, only tested and approved/certified equipment shall be
used respecting the weight of the machine given on the nameplate.
26. Prior to transport or lift of the machine, verify that the rotor cassette is protracted and
locked in position. The service hatch, the filter hatches as well as the electronics cabinet shall
be closed and locked.
27. For transport and lift, the machine must be appropriately secured and the risk area
evacuated and continuously monitored.
28. If after transport and/or lift, there is reason to believe the machine may have been damaged,
it must not be powered and used until it has been inspected by qualified personnel.
29. The machine must not be installed in such a manor that other exterior equipment or
machinery forces the air flows, neither pushes nor extracts air from the machine.
30. The machine must never be used with any other accessories than those listed in this manual
or those specifically approved by Corroventa Avfuktning AB.
For further advice on product safety and use, please contact the supplier.
Product Overview
Main components of the machine
Inspection window,
energy meter and
RCD.
Control Panel
Power intake
Main power switch
Lock, electronics
cabinet
Emergency stop
button
Reset button,
Emergency stop
System connector
Dry air outlet

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Filter hatch, regeneration air
Filter hatch, process air
Lock, service hatch
Process air inlet
Regeneration air inlet
Wet air outlet
Connections for
future expansion
modules
Regeneration fan
Process fläkt
Electronics cabinet with control
panel
Regeneration
heater
Rotor
Rotor motor

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Name plate
The A15 ES nameplate is positioned to the left of the electronics cabinet. The information provided
includes model and year of manufacture as well as relevant technical information.
Other labels and markings
At the bottom of the service hatch is found the below warning label. The intent of this is to inform
and remind the user that the service hatch must be closed and locked during transportation and lift.
Left open, the rotor cassette may slide out and shift the centre of gravity which could cause the
machine to fall over.
Inside the machine, on the rotor cassette and clearly visible when the service hatch is open, the
below warning label is found. The intent of this label is to inform and remind the user that the rotor
cassette must never be extracted whilst the machine is in elevated positions, an example of which is
a lift table. Extracting the rotor cassette will shift the centre of gravity and may cause the machine to
fall over. The rotor cassette has an integrated support but in elevated positions, the support will not
reach the floor or any other surface and will thus not help prevent an accident.

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On the rotor cassette lock mechanism, at its centre by the floor of the machine, is a small warning
symbol intended to remind the user of the above warning in case lighting conditions or other
circumstances blocks it from view or if it has been forgotten.
In addition to the warning labels, inlets and outlets as well as filter hatches are marked with their
respective functions so as to simplify installation and prevent mistakes.

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Dehumidification theory and methods
Relative humidity and its effect on substances
All air contains moisture, sometimes more, sometimes less although the naked eye cannot see it until
it condenses in small droplets on, for instance, a metal or glass surface. Already before it is visible
however, the moisture affects substances and production processes, causes corrosion and micro-
organism growth.
Air humidity is measured and referred to in terms of Relative Humidity (%RH) which is the ratio
between how much water it does contain and how much it can contain at given temperature and
pressure. The higher the temperature, the more water the air can contain but it is still the Relative
Humidity that is important and that needs to be controlled if one wants to prevent corrosion or
mould growth.
At RH 100% the air is saturated –there is fog and the moisture condensates in small droplets.
Already at RH 60% steel corrodes and at 70% there is a risk for mould growth. As a rule of thumb, RH
50% is a good climate for most substances.
How to select dehumidifier type
The adsorption principal has, compared to condensation drying, the advantage of a lower ambient
temperature dependency. Adsorption functions even well below the freezing point while the
capacity of a condensation dehumidifier inevitably decreases rapidly with falling temperature,
something that is depicted in the diagram below to the left.
As a rule of thumb, a general aid in the selection of type, it can be said that adsorption is the primary
choice for drying of unheated spaces or when material is to be dried. Adsorption dehumidifier
produces dehumidifier air, generates a greater reduction of water content measured in grams per
kilogram (Δx), and consequently creates a greater water vapor pressure difference which is directly
correlated to the drying speed. Drying of insulation such as floor structures are dried with combined
use of turbines, high pressure fans, installed for either suction or pressure drying.
Condensation dehumidifiers are, in accordance with the diagram above, used in hot and humid
conditions provided the goal and aim is drying of rooms, ambient air.
Condensation dryer
Superior within blue area.
Functions within yellow area.
Low or no function in red area.
Adsorption dryer with air-cooled
condensor
Functions within dashed area.
Adsorption dryer
Superior within red area.
Functions in yellow and blue area.
Transition zone
Temperature, °C
% RH
Dry air quality, 20°C
Dry air RH%
Process air RH%
Condensation dryer
Adsorption dryer

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How the dehumidifier works
The A15 ES is an adsorption dehumidifier of four-hole type meaning that it has two fans and two
entirely separated air flows. It is also provided with stubs on all four inlets and outlets for easy
ducting of air flows and full flexibility in installation, allowing the machine to be positioned either
inside or outside the space to be dried. Similarly, the easy ducting also allows for the regeneration air
to be sourced from the most appropriate space, considering both the pressure balance as well as the
energy consumption.
The principals of the dehumidification process implemented with the A15 ES can be described as
follows:
Process air to be dried is drawn into the machine via the process inlet and continues
through the process air filter, removing dust and particles. In the next step, it passes
through the rotor and is put in contact with the silica gel that adsorbs moisture and
dries the air.
In the final step, the dry air passes through the process fan and is pushed out through
the dry air outlet, ready to be distributed to where it is needed.
In parallel with the drying process, to prevent the rotor from being saturated at which point the
dehumidification would have stopped, the rotor is continuously regenerated through use of a
completely separated air flow that functions as follows:
Regeneration air is drawn into the machine through the regeneration air inlet and
proceeds through a filter. The now cleaned air flow proceeds through a small segment
of the rotor, a segment that was just regenerated and thus still heated. The
regeneration air passing this segment will thus recycle portions of the already spent
regeneration energy, increasing the temperature of the new regeneration air while
cooling the rotor.
The pre-heated regeneration air continues through the regeneration heaters,
increasing its temperature and thus its regeneration power, before it again passes the
rotor in the regeneration zone causing the rotor to release adsorbed moisture, thus
regenerating it and making it capable of adsorb new moisture.
The now humid air, normally referred to as wet air, is drawn through the regeneration
fan and pushed out through the wet air outlet.

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Illustration of dehumidification principal
Transport and lift
The weight of the machine supersedes 160 kg and must, to prevent injury, only be lifted by
use of appropriate lifting equipment.
The distance between the feet of the machine allows it to be lifted with forklifts and pallet lifters
intended for EUR-pallets.. At all times and for all transport and lift, ensure that:
•The rotor cassette is retracted and locked in position and that the service hatch, the filter
hatches and the electronics cabinet hatch are all closed and locked. The below label,
intended to remind the user of this is found at the bottom of the service hatch.
•The forks of the lifting equipment (e.g forklift, pallet lifter) are long/big enough for the entire
machine to rest securely on them.
•That the machine is secured in the manor appropriate to its weight and to the lifting and/or
transportation equipment used to the purpose.
•That, for lifts, the centre of gravity of the machine is positioned securely, close to the centre,
so as to prevent the machine from falling over.
•That the danger area that arises from the lift/transport is evacuated and secured.

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Delivery inspection, inspection after transport/lift
When the A15 ES has arrived to the site at which it shall be installed and used, it shall be inspected to
ensure that it has not been damaged from the transport and/or lift. If there are visual indications or
other reasons to believe damage has occurred, the machine must not be powered and used until it
has been inspected by qualified personnel.
Storage
For storage of the dehumidifier, prior to installation or between different installations, the following
shall be observed so as to ensure maximum life length and avoid unnecessary damage and
degradation:
•Store the dehumidifier indoors so that it is protected from dust, high humidity, rain,
snow/frost and aggressive contaminants.
•Ensure that the dehumidifier is protected from physical damage such as forklift collisions etc.
•Position the dehumidifier upright, standing on its feet on a horizontal surface.
Installation
The installation of the A15 ES is, for best performance, planned so that the ducting required are kept
as short as possible and also, for the two respective air flows, as well balanced as possible in that the
respective lengths of the inlet ducting and the outlet ducting are similar.
Long ducting always comes with significant pressure drops, decreasing the capacities of the
respective fans and thus also the dehumidification capacity and energy efficiency..
As a guideline to the installation planning, observe the following:
•Plan the installation and position the machine in such a way that the required ducting is as
short as possible.
•Use the same and as big dimensions as possible of hoses/pipes for regeneration air and wet
air and, respectively, for process air and dry air. The goal and emphasis shall be to get as
small pressure drops as possible and that the pressure drop before and the pressure drop
after, the machine are as similar as possible in the two respective air flows.
•Try to avoid leakages in joints and transitions as those constitute losses in performance.
•Ensure that wet air ducting slopes away from the machine rather than towards it to prevent
possible condensation from flowing back into the machine. Place suitable drainage hole at
low point of the ducting unless condensation can be allowed to continue through the
ducting.
•Use insulated ducting to minimize condensation if there is risk of sub-zero temperatures or if
ambient temperature still is foreseen to be below the dew point of the ducted air.
•Consider that vibrations/sound propagate through piping and its fixations and that,
preferably, flexible tubes are used for the transition from the machine to fix installation.
•Regeneration air inlets outdoors are preferably made so that:
oDust, dirt, exhausts or other unsuitable/harmful gases are drawn into the machine.

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oRain or snow is not drawn in.
oWire mesh with mask size of around 10mm is appropriate to prevent objects and
animals from entering while still not causing excessive pressure drop.
oIs positioned so that the wet air from the machine will not be drawn back into the
machine –preferably placed at least two meters or more away.
•Wet air outlets outdoors are made such that:
oThe ducting has a continuous slope outwards so that condensation will be allowed to
exit or, if this is not possible, there is a drainage point made at suitable low point.
oWire mesh with mask size of around 10mm is appropriate to prevent objects and
animals from entering while still not causing excessive pressure drop
In the planning, with regards to the machine positioning, also consider that:
To allow for the service hatch to be opened for service and repair, a floor space with a
depth of minimum of 850 mm is to be left free. In open position, the service hatch is
raised vertically and thus the free height is most preferably 1900 mm.
The floor of the free space in front of the machine hatch is preferably of the same
height as that of the floor on which the machine is positioned. The reason is that the
extractable rotor cassette is provided a support to prevent the machine from falling
over due to the shifted centre of gravity. An elevated position of the machine will
prevent the support from reaching the floor and thus the support will no longer
prevent accidents. If an elevated is unavoidable or still preferable, the machine must
be secured to the floor to prevent it from falling over during service and maintenance.
On the rotor cassette, visible when the service hatch is
opened, is a warning label intended to inform and
remind the user about the risk described.
Summary of installation, main points:
1. Position the dehumidifier horizontally and stably so that it does not fall over and cause
damage. Suitably, note the need for free space in front of the service hatch and that elevated
positions are to be avoided as earlier described.
2. Connect required ducting for the respective airflows given the circumstances and observing
the ducting instructions presented earlier.
3. Check that filters, both process and regeneration, are mounted and that these are clean and
intact.
4. Check that service hatch, filter hatches and electronics cabinet are closed and locked.

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5. Check that the power cable to be used is intact and without visual damage. Connect the
machine to 16A 400V 3-phase supply, preferably protected by RCD.
6. Start the machine by turning the mains power switch clockwise to position 1. When the
display starts up, push Resume to continue operation with the settings last used. Push of
Start will get the machine running at maximum capacity (Max mode) and with continuous
operation (control mode Manual
7. Observe that the start sequence takes a few minutes. The last thing to start, at first at low
speed and then slowly increasing to the intended level for the capacity mode selected is the
regeneration fan.
8. Check that the air flows are as expected and that there are no leaks with the ducting.
9. If the machine is equipped with differential pressure sensor for balancing, continue by
adjusting the fan speeds to the ducting by following the process described in chapter
Adjusting air flow balance.
10. If the machine is equipped with filter monitoring, verify and if required adjust the settings
following the instructions provided in chapter Filter monitoring
Start and stop the machine
The machine is equipped with a mains power switch positioned in the lower left corner of the
electronics cabinet hatch.
To start the machine:
1. Turn the mains power switch clockwise to position 1.
2. Await the control panel start up.
3. Once the default view is presented on the control panel, there are two
alternatives presented, Start to the left and Resume to the right.
Select Resume to continue operation with the settings last used with the machine.
Select Start for default operation ignoring previous settings and applying
maximum capacity (Max mode) and continuous dehumidification (control mode
Manual)
Note: The machine will automatically resume operation after power outages. If
this has happened or if last time the machine was used, its operation was not
stopped through the control panel before the mains power switch was turned off,
the default view will present a count down from 30 seconds after which the
machine will automatically resume. If this is not desirable, the automatic restart
can be stopped by push of Stop, the lower centre button of the control panel.
4. The machine will now start its components in sequence. The start procedure is
automatic and takes about five minutes.
To stop the machine:
1. Push Stop on the control panel.

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2. The machine enters a cool down phase, switching off the heaters will allowing the
fans to operate. Time remaining is presented on the screen. Wait for this to be
completed.
3. The machine is now in standby. For complete shut down, proceed by turning
mains power switch anti clockwise to position 0.
Emergency stop
The emergency stop button is positioned next to the mains power switch on the electronics cabinet
hatch and it is engaged by a push.
To reset the emergency stop, first turn the emergency stop anti clockwise and then push the reset
button located to the right.

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Adjusting air flow balance
Note: This feature is optional and not present on all machines.
For optimum performance and dehumidification, at every new installation, the actual operation
point of the machine shall be checked and if necessary, the respective fan speeds adjusted to
compensate for the pressure drops of the ducting. To this purpose, available through the Capacity
Mode menu, there is an adjustment guide graphically presenting the current operation point and
supporting the user in the adjustment.
The capacity modes implemented with the machine are defined with fan speeds suitable for
installations with limited ducting, situations where none of the air flows are subjected to significant
pressure drops which reduces the fan capacities. A lowered regeneration air flow will also lower heat
generated by the PTC heaters which in turn reduces the capacity and the intent of the adjustment
menu is to allow for the user to, if required, adjust the fan speeds to compensate for the ducting and
if necessary, increase the regeneration air flow and thus the capacity. Doing so also comes with
benefit that process air flow can be increased while still maintaining proper and correct pressure
balance between the air flows.
Before adjustment is undertaken, ensure that the machine has been allowed to operate with
intended capacity mode for at least 10 minutes, preferably more, so that it has warmed up and the
power consumption of the machine has stabilized. The regeneration heaters of the machine are of
PTC type which means that the initial power consumption is higher than what is during normal
operation when the machine interior is warmed up. Adjusting the operation too early can thus cause
the user to do incorrect adjustments resulting in a strongly deviating operation point.
How to go about it?
To commence the adjustment, step right in the menu tree using the upper right button until the
Capacity mode screen with the below depicted appearance is reached. In this menu, where selected
capacity mode also is presented, there are two horizontal indicators, one for the regeneration air
flow and one for the process air flow. Each of them is provided a setpoint with dash dotted line and
tolerances indicated with dashed lines. Current actuals are indicated with diamonds shaped symbols.
In the example above, the machine is operating in Max mode and both indicators are currently
outside their allowed intervals. To adjust the operation, push Change and then confirm the selection
of Max mode.

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When this is done, the machine will present a reminder to say that the machine shall preferably be
allowed to stabilize for a minimum of 10 minutes.
When continuing, having allowed for stabilization, the adjustment menu itself is presented and its
appearance is exemplified below. The previously described indicators are there and below them,
information on the respective fan speeds for regeneration and for process.
Begin by adjusting the regeneration fan, thus selecting Reg on the lower left button. The machine will
now present a screen with the regeneration fan speed highlighted and minus and plus options on the
lower left and right buttons. The minus button, lowering the speed of the fan, will move the current
actual to the left while increasing the speed will move it to the right.
Make small incremental adjustments, wait for the machine to stabilize, and then re-evaluate.
Whenever the machine detects rapid and big changes, it will present the text “Stabilizing, please
wait…”.
The power developed by the PTC heaters is, as previously described, governed by how much they are
cooled with the air flow. Thus, if the temperature of the regeneration air is expected to drop
significantly during the operation, it is recommended to leave the regeneration operation point
towards the lower end of the allowed interval.
When the regeneration fan speed is correctly adjusted, save the setting by pushing OK available with
the lower centre button and then repeat the same procedure for the process air fan to complete the
adjustment.

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Once the adjustment is completed, observe and remember the following:
1. In situations where the fan speeds have been increased to overcome pressure drop with
ducting, the filter alarm levels are preferably adjusted or else the dirty filter alarm is likely to
come a bit too late. The reason for this is that the default settings with the machine reflect
the fan speed to air flow ratios reflecting a machine with limited ducting.
2. When capacity mode is changed, the adjustment will have to be repeated. If the machine has
temporarily been put in standby, select Resume to start it again with previous settings and
adjustment. The other option, Start, makes the machine forget previous settings including
adjustment and brings operation in MAX mode with continuous dehumidification (control
mode Manual)
3. Note than whenever the operation point is outside the tolerances, this is indicated in the
default view by a blinking exclamation point after the presentation of the current capacity
mode in the upper right corner.