CorroVenta A2 ES User manual

A2 ES/ A4 ES/ A4 ESX
ADSORPTION
DEHUMIDIFIERS
USER MANUAL

© Corroventa Ltd.
2017.05
1 (43)
Table of Contents
Intended use........................................................................................................................................ 2
Manufacturing Directive ..................................................................................................................... 3
Safety information............................................................................................................................... 4
Relative humidity and its effect on substances................................................................................... 6
How to select dehumidifier type......................................................................................................... 6
How the dehumidifier works............................................................................................................... 7
Dehumidification process.................................................................................................................... 7
Delivery inspection.............................................................................................................................. 8
Product Overview................................................................................................................................ 8
Drying Methods................................................................................................................................... 9
General drying, ambient air ............................................................................................................ 9
Drying of floor structures .............................................................................................................. 10
Suction Drying ............................................................................................................................... 11
Pressure drying.............................................................................................................................. 12
Installation......................................................................................................................................... 13
To Use CTR A ES, menus and operation............................................................................................ 14
Control Modes and Hysteresis .......................................................................................................... 24
Alarms................................................................................................................................................ 25
MID ENERGY METER MENU .............................................................................................................. 27
Network functions............................................................................................................................. 28
How to network machines ................................................................................................................ 29
Service Reminder............................................................................................................................... 30
Maintenance and service .................................................................................................................. 30
Filter replacement......................................................................................................................... 30
Cleaning of rotor............................................................................................................................ 31
Make the machine powerless. ...................................................................................................... 31
Accessories and consumables........................................................................................................... 33
Fault finding........................................................................................................................................... 34
Technical data ....................................................................................................................................... 36
Interface Map for CTR A2ES, CTR A4 ES and CTR A ES.......................................................................... 38

© Corroventa Ltd.
2017.05
2 (43)
User Manual CTR A ES
Intended use
The CTR A ES family of adsorption dehumidifiers is developed and intended for construction drying
and water damage restoration where it can be used standalone as well as in combination with
turbine for, for instance, pressure and suction drying of layered constructions.
Through its control panel, the CTR A ES provides the user with the ability to optimize the operation
for intended work, setting capacity and volume, controlling fan operation as well as using either
built-in or external temperature and relative humidity sensors to achieve desired effect while also
minimizing energy consumption. The CTR A ES is also capable of networked operation and it is
prepared for remote supervision and control. The unit has cable parking integrated with its foldable
carrying handle and its low weight makes it easy to carry and install. Durable yet flexible feet protect
floor surfaces while also allowing stacking of machines. The dehumidifiers are naturally robust in
their design, a prerequisite for a long service life.
•High Capacity
•Low weight –easy to carry and install
•Energy efficient
•Digital interface with networking capabilities
•Robust
•Energy and time meter –resettable work counter
•Very low noise
•The CTR A4ESX has an Extra heater function for improved drying effect

© Corroventa Ltd.
2017.05
3 (43)
Manufacturing Directive
CTR A ES machines are CE approved.
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]

© Corroventa Ltd.
2017.05
4 (43)
Safety information
This equipment can be used by children aged eight (8) years or above and people with reduced
physical, sensory or mental capabilities or with lack of experience and knowledge provided they have
been given instructions and information on how it is safely used and that they understand the
hazards involved.
Children must not be allowed to play with the equipment. Cleaning and maintenance must not be
performed by children without supervision.
Electrical installations made in connection with the installation of the CTR A ES shall be made by
authorized 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.
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 filter is clean. A cluttered filter 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 explosive gases can be present.
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 work place 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.
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 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. Wet air hose/pipe that is used and connected to the dehumidifier must be corrosion-
resistant and able to withstand 80°C heat.

© Corroventa Ltd.
2017.05
5 (43)
22. The Extra Heater on the CTR A4ESX must not be used if the dry air is led into another
machine as this could cause overheat.
23. The dehumidifier 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.

© Corroventa Ltd.
2017.05
6 (43)
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

© Corroventa Ltd.
2017.05
7 (43)
How the dehumidifier works
The desiccant used in the CTR A ES is silica gel which can be regenerated an almost infinite number
of times. Silica gel is a crystal with enormous amounts of microscopic pores which makes its total
surface very large, a single gram has an active surface of 500 to 700m2. Silica gel is very potent and
can absorb water corresponding up to 40% of its own weight. It is not water soluble and can
therefore not be washed away nor dissipate into the passing air.
Dehumidification process
The desiccant is placed in a rotor (1). The air to be dried is drawn through the inlet (2) by a process
air fan (3).
The air passes a filter and then the rotor where after the dried air passes through the dry air outlet
(4) and into the environment to be dried. The rotor has air channels parallel to its axis and is made
from a highly potent desiccant, silica gel, fixed in a ceramic structure. The air channels in the rotor
provide a laminar air flow with a low pressure drop.
The rotor is rotated by an electric motor (5) and a belt (6). The moisture that is adsorbed is
removed by a small volume of process air that is heated (7) where after it is passed through a
section of the rotor, thus regenerating it as well as cleaning it through the counter flow principle.
The wet air is evacuated through the wet air outlet (8).

© Corroventa Ltd.
2017.05
8 (43)
Delivery inspection
CTR A ES is delivered with the following items included:
Adsorption dehumidifier CTR A ES
1 pc
Spare process air filters
2 pcs
Manual
1 pc
Product Overview
Below pictures present CTR A ES with all its external features and controls. The CTR A2 ES is shorter
and has fewer dry air outlets but the other features are the same.
Bus connectors
Foldable carrying
handle with integrated
cable parking
Power switch, on/off
Control panel
Dry air throttles
Dry air outlets
1 x 100 mm
2 x 50 mm
Durable poly-urethane
feet
Process air inlet hatch
with filter
Wet air outlet
Wet air throttle
Used to adjust and
optimize wet air flow to
selected capacity mode

© Corroventa Ltd.
2017.05
9 (43)
Drying Methods
In the following the basics for the different drying methods that can be applied with the CTR A ES and
applicable supplemental products from the Corroventa product portfolio are presented. The
descriptions are merely overviews. Thus, if in doubt on how to proceed with given situation, consult
experienced drying expert.
General drying, ambient air
An adsorption dehumidifier like the CTR A ES produces such dry air that a recirculation air flow rate
of between one and two times per hour is sufficient, to be compared with three to four times which
is suitable for a condensation dehumidifier. In other words, the CTR A ES which produces
approximately 300 m3 of dry air per hour has capacity enough for a room of at least 50 –60 m2 and a
ceiling height of 2.5 meters.
As for all drying, regardless of type or model of machine used, it is important that the room or space
to be dried is well sealed in order for the process to be as energy efficient and quick as possible.
Windows and doors shall be shut and in absence of such delimiters, plastic foils or other temporary
sealing should be used.
If the damage is limited and local, it is preferably sealed with plastic foil and a hose then used to lead
the dry air in under the foil. By the edges of the foil small openings are left to let the air through and
create circulation. This method makes the process go faster and thus consume less energy.
Drying of limited, local damage sealed with plastic foil in order to speed up the process
and save energy.

© Corroventa Ltd.
2017.05
10 (43)
Drying of floor structures
For drying of floor structures with easily dried insulation like glass wool or none insulated structures,
the CTR A ES is with advantage used with a high pressure fan like the HP2000 in accordance with the
schematic sketch below. Note that the capacity of the fan widely exceeds that of the dehumidifier
and therefore the fan must not be directly connected to the dehumidifier by hose as this would
seriously affect its function and degrade is efficiency. Instead, leave the dry air hose from the
dehumidifier on the floor just by the fan so that the dry air is sucked in along with ambient air.
Drying of floor structure. Note that the dry air hose of the dryer on the right is not
directly connected to the fan but left just next to its inlet.

© Corroventa Ltd.
2017.05
11 (43)
Suction Drying
For suction drying of layered constructions such as floating floors, the CTR A ES is used with one or
more turbines from the Corroventa product portfolio, in accordance with the schematic sketch
below. The turbine or turbines are connected to hoses with filters and water separators through
which they draw air from layered construction and then evacuate this, normally outdoors. The
dehumidifier is placed in the room and its wet air hose installed to evacuate the wet air. The turbines
will this way draw dry air down into the layered construction through drilled holes or through the
gaps between the floor and the walls.
Note that, as mentioned above, a water separator must be used to avoid free water from being
sucked into, and damaging, the turbine.
Suction drying. The dryer dries the ambient air and turbines draws and evacuates air from the
construction. The resulting underpressure in the construction draws dry air into it.
Suction drying setup:
At the top, CTR A4 ES drying
ambient air.
In the center, a CTR T4 ES turbine
pulling air from the water separator.
The turbine outlet shall be provided
a hose leading to where the humid
air from the construction can be
released. The turbine is powered
through the water separator power
outlet.
At the bottom, a WS4 ES water
separator connected to hose system
with suitable number of distributed
suction points so as to ensure air
movement beneath the entire floor.
Use hose to release
the humid air from
the turbine outside
the room.

© Corroventa Ltd.
2017.05
12 (43)
Pressure drying
For pressure drying of layered constructions such as floating floors, the CTR A ES is used with one or
more turbines from the Corroventa product portfolio, in accordance with the schematic sketch
below. Pressure drying is two to four times faster than suction drying and is therefore, whenever
feasible, the primary choice unless mould or fibres are present.
Pressure drying means leading dry air from the CTR A ES to a turbine and applying that to push the
air into the layered construction. This way, hot and dry air will travel through construction making
itstemperature rise which increases the speed of the drying process. Wet and cooled air exits the
construction through drilled outlets or through the gaps between the floor and the walls and then
returns to the dehumidifier as process air.
Before pressure drying is applied, suction drying should be used to evacuate any free water and
prevent this from being pushed into other parts of the construction/building. When setting up the
machines for pressure drying, it is very important to check turbine is not pulling more air from the
dehumidifier than it can deliver. Therefore, always verify that the wet air volume is in balance with
the dehumidifier. When using a CTR ES version turbine, this machine is preferably set to flow mode
so that it maintains constant air flow. There is also the possibility of networking the two units, using
the turbine as Master, and setting up the adsorption dehumidifier slave to pressure drying mode
where it automatically adjusts the wet air volume to requirements. Still, always check the status of
the units before leaving the site so that the installation works as intended. Furthermore, please note
that the Extra Heater available with the CTR A4ESX must not be used when the dry air is led to a
turbine as this will cause overheating.
Pressure drying might free particles/fibers from the construction and thus release them in the air. If
this is a potential problem, another method, e.g. suction drying, should be applied.
Pressure drying. The turbine is fed with dry air from the dehumidifier and presses this air into the
layered construction.

© Corroventa Ltd.
2017.05
13 (43)
Installation
CTR A ES is placed and installed leveled and in a stable position so that it does not fall over and cause
damage to the machine itself, person or property.
A hose is connected to the wet air outlet in order to evacuate the moist from the room or space to
be dried. The wet air hose shall have a smooth interior surface and shall be as short as possible, no
longer than 5 meters for optimal function and performance.
In the event of problems with condensate in the wet air
hose these can, unless the hose can be shortened which is
the best solution, be improved by a further small
reduction of the dry air volume which will increase the dry
air volume. The performance will be lowered so this must
be considered and decided case by case. Another option
is to make a small hole in the wet air hose and use a
bucket for collection of the condensate.
Installation in short, main points:
1. Place the dehumidifier where the wet air hose will reach the intended evacuation point.
Make sure that the dehumidifier is leveled and that it cannot fall over and cause damage.
2. Connect the wet air hose and lead it to intended evacuation point (hole in the wall or
window etc. Verify that the hose is not squeezed or bent to sharply but that it will allow for
unobstructed wet air flow.
3. Verify that the wet air throttle is fully open. For normal drying of ambient air, both dry air
throttles shall be fully open too.
4. Connect the cable to a 1-phase, 230 V AC socket with a 10A or maximum 16A fuse. As the
machine is normally used in humid or wet spaces, the use of a ground fault circuit interrupter
is strongly recommended.
5. Start the machine using the power switch. When the display lights up, in the first screen
presented after the start-up, push Start.
6. Allow for the machine to warm up for a few minutes.
7. In order to optimize the operation of the machine, push the top right button three times to
enter the Capacity menu. At the bottom of the screen, there is a wet air level indicator
showing current operation. Slowly, use the dry air throttle to adjust the flow so that the
indicator is centered on the dashed line for optimum performance.
The wet air shall always be evacuated from the
room/space to be dried.

© Corroventa Ltd.
2017.05
14 (43)
To Use CTR A ES, menus and operation
The CTR A ES has an easily understood user interface with a display and five push buttons. The two
larger buttons on the respective sides of the display are used to select between the different menus
–no changes to the setup can ever be made with these buttons as they are for navigation only.
The three smaller buttons below the display are used for selection and editing and their respective
functions are always presented in text and the bottom of the screen. At the top level menus, the left
of these buttons is named Home and a push on this button will immediately lead back to the default
view. In many of the views there is an Info button which presents information that may be of use to
the inexperienced user.
If the backlight of the display has timed out, the first button push serves only to light up the display.
After 10 minutes, if no button is pushed, a key pad lock is activated. The machine is then unlocked by
simulataneous push of the two upper buttons, something that is presented in text as well as picture
on the display.
Top left and right buttons –Menu navigation only. Never changes
any settings.
Home button Return to the default view
Info button Presents information. On-board
manual

© Corroventa Ltd.
2017.05
15 (43)
Capacity mode
Indicates what
capacity mode is
selected, Max, Eco
or ΔX.
Wet air volume indicator
↕ -optimum wet air volume.
↑ - wet air volume should be
increased, it is currently too
low
↓ - wet air volume should be
decreased, it is currently too
high
SuperVision
Visible when the
machine is
connected to
SuperVision for
remote monitoring
and control.
Network status
“Master” or “Slaved”
If the machine is
connected to local
network, this position
indicates whether the
machine is controlling
the network, Master, or
if it is controlled by
other machine and thus
Slaved.
Timer
Visible when
machine is set to
operate on Timer.
Slaved –indicates
that the machine
is controlled by
other machine.
Alarm
Machine has
detected an error.
Drying indicator
Moving when
drying is on-going.
Fan indicator
Moving when fan
is running.
Fan mode
Cont - continuous
fan.
If not displayed,
fan only operates
when drying is
required.
Control mode
Indicates how the drying
is controlled, if it is
continuous (MAN -
manual) or if it operates
to defined setpoint
Relative Humidity, RH,
mixing ratio, MIX or Dew
point, DEW. It can also
be controlled by external
hygrostat, HYG.
If external Relative
Humidity and
temperature sensor is
used, this position reads
E.RH, E.MIX or E.DEW.
Extra heater
(CTR A4 ESX)
Displayed when
Extra Heater is
activated.
Symbol moves
whenever the
Extra Heater is on.
Setpoint
adjustment
indicates that the
left and right
buttons below the
screen are used to
increase and
decrease the
setpoint which is
displayed with
black background.

© Corroventa Ltd.
2017.05
16 (43)
Start up view
When the A ES starts up, the display presents the user
with two options:
Start: Starts the machine with default settings,
continuous operation with maximum capacity.
Previous settings made such as the use of sensor
control, Timer etc..
Resume: The machine resumes operation with the
settings it had last time it was used.
If, last time it was used, the user never pushed stop
before the power was cut, the machine will
automatically resume operation when the countdown
has reached zero.
A push of Pause button will stop the countdown and
the machine will remain in standby until manually
started.
Normal start
Start after power out –
automatic resume of operation
Default View
When the A ES is operating, the machine can always be
stopped, set to standby, by use of the center button
below the display.
When the machine is running with a control mode
other than MAN, manual, the setpoint value which is
highlighted with black background at the center of the
screen can be increased and decreased by use of the
minus (-) and plus (+) buttons respectively.
Default screen pictures.

© Corroventa Ltd.
2017.05
17 (43)
Control Mode
The Control Mode determines whether the drying shall
be continuous (MAN –manual mode) or if it shall
operate only when required as determined by the
ambient climate.
The selected control mode is displayed in the lower left
corner of the default view.
The Control Mode selection screen is reached by one
push of the upper right button.
The following basic control modes are available:
MAN
Manual, continuous drying.
RH
Drying down to selectable Relative
humidity, %.
MIX
Drying down to selectable mixing ratio,
g/kg.
DEW
Drying down to selectable dew point, °C
HYG
Drying controlled by external hygrostat
connected to the machine.
Through its network capabilities, the machine can also
connect to external RHT sensors and use their values to
control the operation rather than using the built-in
Relative Humidity and Temperature sensor. For this
purpose there are also the following External sensor
modes:
E.RH
Drying down to selectable Relative
humidity, % as given by external RHT
sensor(s) connected to the machine.
E.MIX
Drying down to selectable mixing ratio,
g/kg as given by external sensor(s)
connected to the machine.
E.DEW
Drying down to selectable dew point, °C,
as given by external sensor(s) connected
to the machine.
The External control modes require the machine to be
networked and connected to an external RHT sensor. If
the machine is not networked already, the machine will
ask if it shall create a network.
If there are multiple sensors in the network and
alternative <All< is selected rather than one unique
sensor, e.g. RHT61, the machine applies “worst case”
and operates as long as any one of the sensors read a
humidity above the setpoint.

© Corroventa Ltd.
2017.05
18 (43)
When selecting mode other than MAN, the machine
presents the user with the possibility of determining
the setpoint.
When reaching the setpoint level, the drying
automatically stops. Should the humidity later on rise
above the setpoint level, drying operation is
automatically resumed.
Hysterisis
When selecting RH, DEW or MIX control modes, to the
right in the display there is a symbol and a hysteresis
value presented.
The symbol indicates the position of the setpoint in the
operation span as presented below.
↕ - center
↓ - bottom
↑ - top
Fan Mode
The Fan mode determines whether the fan in the
dehumidifier shall operate continuously or if it shall
operate only when drying is required and ongoing.
If continuous fan is selected, the word CONT is
presented in the lower right corner of the default
screen.
If possible, for optimal drying effect, use continuous fan
to keep the air in constant motion.

© Corroventa Ltd.
2017.05
19 (43)
Capacity Mode
The drying capacity of the CTR A ES can be optimized to
the given work and situation by use of three different
operation modes.
When set to MAX, maximum, the machine operates to
remove as much water as possible. When the full effect
of the machine is not required, it can instead be set to
ECO, eco-mode, where the energy consumption per
liter of removed water is minimized.
For local water damages where the dry air volume is
not required, the machine can be set to one of its ΔX
modes where it operates to produce a smaller volume
of even drier air, something that will further increase
the speed of the drying process. The difference
between ΔX1 and ΔX2 etc., is the dry air volume where
ΔX1 has the lowest volume.
For use during pressure drying when the machine is
slaved to a turbine on a local network, the CTR A ES also
has a pressure drying mode, PRS, where it
automatically adjusts the wet air flow to produces as
dry air as possible.
MAX
For maximum water removal
ECO
For minimal energy consumption per
liter water removed
ΔX1, ΔX2..
For maximum ΔX, as dry air as
possible. Reduced air volumes
suitable for, for instance local, sealed
of water damages.
PRS
Pressure drying mode that can be
used when the machine is connected
to a network and slaved to a turbine.
When the machine is installed and started up and
whenever the capacity mode is changed, the wet air
flow needs to be adjusted for optimum performance.
When the capacity mode is changed, the machine will
guide the user through the procedure as depicted to
the right.
If the wet air hose is long, it might be necessary to
reduce the dry air flow somewhat in order to achieve
the correct wet air volume. Normally however,
adjusting the wet air throttle is sufficient to achieve
required wet air volume.
When adjusting the wet air flow, adjust slowly the
throttle slowly and allow for the indicator to stabilize
before evaluating whether the adjustment was
sufficient or if further increase or decrease is required.