CorroVenta L4 ES Series User manual

ADSORPTION DEHUMIDIFIER
WITH CONDENSER
L4 ES
USER MANUAL

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
1 (42)
Contents
Area of use .........................................................................................................................................2
Delivery check ....................................................................................................................................3
Manufacture directive .........................................................................................................................3
Safety information ..............................................................................................................................4
Relative humidity and its impact on materials....................................................................................5
How to select dehumidification technology for a given situation .......................................................5
This is how the dehumidifier works ....................................................................................................7
Dehumidification process ...................................................................................................................7
Product overview................................................................................................................................9
Installation ........................................................................................................................................10
Transportation ..................................................................................................................................13
Storage .............................................................................................................................................13
Drying methods ................................................................................................................................14
General drying, room dehumidification...............................................................................14
Drying framed flooring and beams .....................................................................................15
Suction drying ....................................................................................................................16
Pressure drying..................................................................................................................17
Using L4 ES, menus and operation .................................................................................................18
Control mode and hysteresis ...........................................................................................................29
Alarms...............................................................................................................................................30
MID ENERGY METER MENU .........................................................................................................32
Network functions.............................................................................................................................33
Connecting machines to a network..................................................................................................33
Maintenance and service .................................................................................................................34
Service reminder................................................................................................................34
Filter replacement ..............................................................................................................35
Cleaning the rotor insert.....................................................................................................36
Accessories and consumables.........................................................................................................39

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
2 (42)
Fault tracing......................................................................................................................................39
Technical data ..................................................................................................................................41
User instructions L4 ES
Area of use
L4 ES is an adsorption dehumidifier with air-cooled condenser, developed and designed for construction
dehumidification and for drying water damage and is very practical for use in situations where it is
difficult to extract wet air from a normal adsorption dehumidifier.
Using the adsorption principle, L4 ES also works at low temperatures and by condensing in the air-
cooled condenser, the room is supplied with up to 400 W of extra heat.
Via the control panel, the user of L4 ES can optimise the operation for the intended job, set the capacity
and volume, control the fan as well as use integrated or external sensors for temperature and relative
humidity to achieve the desired effect in combination with the lowest possible energy consumption. L4
ES can also be used in networks and is prepared for remote monitoring and remote control.
Furthermore, it has a built-in pump, integrated hose and cable wind, as well as flexible support feet that
protect floor surfaces and at the same time allow stackability. Its robust design gives a long service life.
In addition to room drying, L4 ES can also be used together with turbines for drying layered
constructions, both suction and pressure drying.
Properties:
•Energy efficient
•Service-friendly
•High capacity level
•Digital interface with network function
•Robust
•Very quiet
•
Low weight
•
Energy and time meter – resettable work
counter
•Easy to transport
•Stackable
•Ergonomic
•Very compact

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
3 (42)
Delivery check
L4 ES is supplied with the following parts in the package:
Dehumidifier L4 ES
1 x
Extra process air filter in addition to the one in
the dehumidifier
2 x
Manual
1 x
Manufacture directive
The machines in the L4 ES series are CE approved.
Limitation of Liability
•Incorrect installation and/or incorrect use can cause property damage as well as injury.
•The manufacturer assumes no liability for property damage or injury incurred as a result of
failing to follow these instructions, the machine being used for purposes other than those
intended or failure to observe these warnings. Such damage, injury or liability is not covered by
the product warranty.
•The product warranty does not cover consumable parts or normal wear.
•The purchaser is responsible for checking the product upon delivery and before use to ensure it
is in good condition. The product warranty does not cover damages resulting from the use of
defective products.
•Changes or modifications to the machine must not be performed without written permission
from Corroventa Avfuktning AB.
•The product, technical data and/or installation and operating instructions are subject to change
without notice.
•These user instructions contain information protected by applicable intellectual property laws.
No part of these user instructions may be reproduced, stored in a retrieval system or
transmitted to third parties in any form or by any means without the prior written consent of
Corroventa Avfuktning AB.
Any comments regarding the content of this document must be sent to:
Corroventa Avfuktning AB Tel: [phone]
Mekanikervägen 3 Fax [phone]
SE-564 35 Bankeryd E-mail: [email protected]
SWEDEN

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
4 (42)
Safety information
The equipment can be used by children over 8 years old and people with reduced physical, sensory or
mental capabilities, or by people who lack of experience or knowledge, on the condition that they have
received guidance or information on how to use the equipment safely and understand the risks that may
occur.
Children must not be allowed to play with the equipment. Cleaning and maintenance must not be
carried out by children without the supervision of an adult. Electrical installations carried out in
connection with the installation of L4 ES must be done by a qualified electrician in accordance with local
and national regulations.
In addition, the following warnings and instructions must be read and followed:
1. The dehumidifier is only intended for indoor use.
2. The dehumidifier must not be powered on before installation is completed in accordance with
this manual.
3. The dehumidifier must not be covered because this may lead to overheating and fire.
4. The dehumidifier must not be used as a worktable, trestle or stool.
5. The dehumidifier is not intended to be stood or climbed on.
6. Never operate the dehumidifier without installing the filter, as this may damage the
dehumidifier. Ensure that the filter is clean. If it is blocked, the machine may overheat.
7. Do not allow the dehumidifier to draw in alkaline chemicals or organic substances with a high
boiling point, such as oil, grease, solvents, boracol or similar. These can damage the rotor.
8. The dehumidifier may not be used in areas where it can produce explosive gases.
9. Do not insert objects into the intake or exhaust as this could damage the dehumidifier and
injure people.
10. Place the dehumidifier on a firm and flat surface so that it cannot overturn.
11. Keep children, animals and bystanders away from the workplace.
12. Contact the supplier if the dehumidifier is damaged or if the plug or the electrical cable are
damaged. Do not make any repairs yourself if you have not undergone the supplier's training.
13. Do not damage the electrical cable. The cable must not run through water or over sharp edges.
14. Never carry or drag the dehumidifier by the cable.
15. Using electrical equipment in very damp or wet conditions can be dangerous. Do not operate
the dehumidifier if it is standing in water.
16. The dehumidifier may only be connected to a grounded socket with voltage according to the
rating plate.
17. It is recommended to use an earth-fault breaker to minimise the risk of electric shock.
18. Water must not encounter the dehumidifier's electrical components. If it does, ensure that they
are dried thoroughly before the dehumidifier is used again.
19. Never open the dehumidifier for cleaning or service without first ensuring that the dehumidifier
is disconnected from power.
20. Repairs and maintenance of the dehumidifier's electrical system must be performed by a
qualified electrician.

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
5 (42)
21. The dehumidifier must not be used with accessories other than those described in this manual
or approved by Corroventa Avfuktning AB.
Contact the supplier of this dehumidifier for further advice on the safety and use of the product.
Relative humidity and its impact on materials
All air contains a greater or lesser degree of moisture. We can’t see it with the naked eye until it appears
in the form of small water drops against a cold metal or glass surface for example. However, before it is
visible, moisture is already causing problems by affecting materials and manufacturing processes,
causing corrosion and growth of micro-organisms.
Air moisture is measured and usually given in relative humidity (% RH). It is a measurement of how much
water vapour the air contains over how much it can hold in total at a given temperature and pressure.
The higher the temperature, the more water the air can hold, but it is the relative humidity that is
calculated and must be controlled to prevent corrosion or mould growth.
At 100% RH the air is saturated, and the moisture falls in the form of small water droplets. Steel
corrodes at 60% RH and at 70% RH there is a risk of mould. A rule of thumb is that 50% RH is a good
climate for most materials.
How to select dehumidification technology for a given
situation
The adsorption principle has the advantage of not having the same temperature dependence as
condensing dehumidification. Adsorption also works way below freezing, whilst condensing drier
capacity decreases sharply with decreasing temperature, which is illustrated in the graph below to the
left.
An adsorption dehumidifier with air-cooled condenser like L4 ES, bridges these properties by working
within a large area, including the primary area of the condensing drier. In other words, it is the best
option for room drying at low temperatures, ideal for emergency damage and construction
dehumidification.
As a general tip when choosing the technique for the relevant drying situation, it can be said that
adsorption dehumidification is the primary choice for drying in unheated spaces or when material drying
is required. The latter is justified by the adsorption dehumidifier producing dehumidifier air, i.e. provides
a greater difference between the incoming and outgoing air's moisture content calculated in grams per
cubic metre (ΔX), which can be seen using the graph to the right below and which is decisive for the rate
of drying. Layered structures are dried by the machine being installed, with the turbine, for suction or
pressure drying.

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
6 (42)
As the graph above shows, condensing drier are used in hot and humid spaces if room drying is required.
Relative humidity (% RH)
Temperature ◦C
Process air / Relative humidity (%)
Dry air / Relative humidity (% RH)

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
7 (42)
This is how the dehumidifier works
L4 ES is an adsorption dehumidifier with built-in air-cooled condenser through which cooled air from the
surrounding area passes, driven by the process/cooled air fan.
The desiccant used in L4 ES is silica gel, which can be regenerated an almost unlimited number of times.
Silica gel is a crystal with a lot of microscopic pores that make the total surface very large. A single gram
has an active surface of 500 to 700 m2. It is very powerful and can absorb a volume of water of up to
40% of its own weight. It is not water soluble and therefore cannot be washed away or diverted to the
passing air.
Dehumidification process
The desiccant is placed in a rotor (1). The air to be dried is sucked in through the inlet and
passes a filter (2) by means of a process/cooling air fan (3).
The air then passes the drying rotor, after which the dehumidified air goes through the dry air
outlet (4) to the area to be kept dry. The rotor has axially directed air ducts and consists of a
highly active desiccant, silica gel, bonded in a ceramic structure. The axially directed air ducts
in the rotor give laminar flow with minimal pressure drop.
The rotor rotates by means of a drive motor (5) and a drive belt (6). The moisture that
is adsorbed in the rotor is driven out by a small portion of the process air being heated by the
heater (7) and then passing a smaller part of the rotor, which is thus regenerated and cleaned
by the countercurrent principle.
The wet air is removed via the outlet (8) and led to the air-cooled condenser (9), where it is
cooled by air from the surroundings and then resupplied to the dehumidifier as part of the
new process air. The condensation water in the condenser runs down into the bottom tray
(10) and is removed via the built-in pump (11).
The bottom tray is equipped with overfill protection (12) that shuts off the machine if the
condensation water is not removed. The control electronics (13) are located in the cover. L4
ES is also equipped with a cooling air connector (14). The cooling air ensures that the cooling
air flow across the air-cooled condenser and connector connection makes it possible to
connect a cooling air hose to route the cooling air away. If there is a need to create negative
pressure during the drying process, this is an energy efficient way of routing the cooling air
out. The cooling air flow/The cooling air connector must always be fully open.

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
8 (42)
11
10
4
7
8
9
2
3
1
6
5
12
13
14

Description:
Manual L4 ES HP; L4 ES HP W
Document Number:
1004289
Created By:
MSHN
Revision Approval Date:
2019-06-28
Revision:
A
© Corroventa Avfuktning AB
9 (42)
Product overview
The images below present L4 ES with all external parts and controls.
Folding handle with
integrated cable reel
Control panel
Dry air outlet with
damper
2 x 100 mm
2 x 50 mm
Process/cooling air inlet
with filter
Durable Feet
Switch
Control panel
System
device
Cooling air outlet
Condensation water
hose
Wheels with roller
bearings (only L4 ES
HPW)
Folding carry
handle/manoeuvring
handle
(only L4 ES HPW)