Aerial AD 740 Series User manual

MADE IN GERMANY
EN
INSTRUCTION MANUAL
Air dehumidifier
Series
AD 740

This instruction manual shall not be reproduced, copied and distributed, neither
in parts nor completely, without the manufacturer's written permit.
All rights reserved.
The instruction manual is based on the technical and product-specific
parameters. The manufacturer reserves the right to add supplementary
information to the instruction manual.
Any use of the dehumidifier outside the specified conditions and contrary to its
designated use shall lead to the forfeiture of all guarantee claims.
As of: 05_2018

CONTENTS
Page 1 of 29
1Notes on this instruction manual____________________________________________ 3
Target groups ______________________________________________________________ 3
Conventions _______________________________________________________________ 3
2Safety ____________________________________________________________________________ 4
Safety devices______________________________________________________________ 4
Hazards from accessories__________________________________________________ 4
Authorized operator _______________________________________________________ 4
Safety instructions _________________________________________________________ 5
3Performance description______________________________________________________ 6
Designated use ____________________________________________________________ 6
Scope of delivery___________________________________________________________ 6
Optional components______________________________________________________ 6
Device description _________________________________________________________ 7
4Optional components__________________________________________________________ 9
Pump-out kit for condensate_______________________________________________ 9
5Transport and installation ___________________________________________________10
Transport _________________________________________________________________ 10
Installation________________________________________________________________12
Operating conditions______________________________________________________12
Electrical connection ______________________________________________________13
Connect condensate drain hose___________________________________________ 13
6Operation and operator control ____________________________________________15
Operating elements_______________________________________________________15
Commissioning ___________________________________________________________16
Operator control __________________________________________________________16
Set language ______________________________________________________________18
7Maintenance and service ____________________________________________________20
Cleaning and inspection___________________________________________________21
Spare parts and customer service_________________________________________22
8Troubleshooting _______________________________________________________________22
Fault messages ___________________________________________________________23
Faults _____________________________________________________________________23
9Shutdown, storage and disposal____________________________________________26
Shutdown_________________________________________________________________26
Storage ___________________________________________________________________26
Disposal __________________________________________________________________26

CONTENTS
Page 2 of 29
10 Specifications __________________________________________________________________27
11 EU Declaration of Conformity _______________________________________________29

Page 3 of 29
1Notes on this instruction manual
This instruction manual is part of the product. It contains important information
on how to transport, install, operate, store and dispose of the air dehumidifier
manufactured by AERIAL properly and safely. Therefore keep this instruction
manual in a safe place. In the section below you will find information about the
target groups of this instruction manual and the conventions used in this
document.
Target groups
This instruction manual addresses all users / operators of the air dehumidifiers
manufactured by AERIAL. These persons must have read and understood the
instruction manual. The physical and psychological requirements for proper and
safety-conscious handling of the dehumidifiers must always be met.
Conventions
In this instruction manual you will find notes preceding the operating steps
described to warn you of possible hazards.
DANGER
Type and source of hazard
This symbol in connection with the word "Danger" warns of a
high risk of severe injury or acute danger to life.
Measures to avert danger or immediate measures if the
risk occurs are described in this way
WARNING
Type and source of hazard
This symbol in connection with the word "Warning“ warns of a
risk involving severe injury.
Measures to avert danger or immediate measures if the
risk occurs are described in this way

Page 4 of 29
CAUTION
Type and source of hazard
This symbol in connection with the word "Caution" warns of a risk
of minor or moderate injury and material damage.
Measures to avert danger or immediate measures if the
risk occurs are described in this way
In this box you find further tips and information concerning the
use of the air dehumidifiers.
2Safety
Safety devices
The air dehumidifier AD 740 was subjected to thorough safety testing. Improper
operation or misuse will cause danger to:
the operator,
the machine and other material property of the user,
efficient operation of the machine.
All persons involved in the installation, commissioning, operation, maintenance
and repair of the air dehumidifiers must
be properly qualified,
closely observe the instructions set out in this manual.
Hazards from accessories
Waste water hoses and air filters must be properly installed and must not disable
the protection devices of the air dehumidifiers. The operating elements must
always be accessible.
Authorized operator
Operation of or other work on the air dehumidifier may only be carried out by
persons commissioned and instructed by the user. In the working area the
operator is responsible to third parties.

Page 5 of 29
Responsibilities for the various activities on the air dehumidifiers must be clearly
defined and observed. Unclear competencies are a safety risk.
The user must:
make the instruction manual accessible to the operator and
make sure that the operator has read and understood the instruction
manual.
Safety instructions
The air dehumidifier must not be used under the following conditions:
in rooms with potentially explosive atmospheres.
in rooms with aggressive atmospheres, e.g. ammonia, wood acids, chemicals,
excessive chlorine content etc.
in rooms with water with a pH value outside the range from 7.0 to 9.0.
In case of lower pH values there is risk of corrosion for all metals
and risk of damage to mortar-containing materials (joints). Higher
pH values cause skin and mucous membrane irritations and
increased lime deposits.
in rooms with salt or liquids with a salt content > 1%
(incl. brine baths).
in rooms with ozone-treated air.
in rooms with high solvent concentration.
in rooms with extreme dust load.
Please note that excessive air movements in the room may impair
the function of the air dehumidifier because they could disturb the
air flow of the dehumidifier.
In addition the following must be observed when using the air dehumidifier:
Work on electrical equipment may only be carried out by skilled electricians.
Original spare parts or spare parts approved by the manufacturer shall
exclusively be used.
In the event of any malfunction the air dehumidifier must be switched off
and secured against unintended restarting.

Page 6 of 29
3Performance description
You bought an air dehumidifier manufactured by AERIAL and thus decided for a
well-proven product "Made in Germany".
Designated use
The air dehumidifier is designed exclusively for dehumidifying air at atmospheric
pressure in enclosed indoor rooms.
The air dehumidifier can prevent the formation of condensation water, remove
excessive humidity and keep humidity at a defined constant level.
Operating the dehumidifiers within the limits of designated use also involves
observing the specified operating conditions (refer to page 12).
Any use of the air dehumidifier not in conformity with or going beyond the
designated use is considered contrary to its designated use and will result in the
forfeiture of all warranty claims.
The operating time of the air dehumidifier until drying of the room
and the humidity to be reached depend largely on the ambient
conditions in the room in which the air dehumidifier is installed.
Scope of delivery
Air dehumidifier
Water collecting tank
one instruction manual
Optional components
Pump-out kit
Dewpoint kit to recognize thawing
Condensate drain hose

Page 7 of 29
Device description
Fig. 1: Air dehumidifier AD 740
1
Handle
5
Wheels
2
Front wall (air outlet)
6
Plug socket
3
Fastening points for straps
7
Fuse for plug socket 6 A
4
Cable winder
,
The air dehumidifier AD 740 is provided with two transport wheel and a fold-up
handle. Lashing straps can be attached laterally to the device. The fused plug
socket serves for connecting further devices.
The water collecting tank is located in the air dehumidifier (Fig. 2, item 4). The fill
level of the water collecting tank is measured via a float, and the air dehumidifier
is switched off when the tank is full

Page 8 of 29
Fig. 2: Series AD740 air dehumidifier (rear view)
1
Room sensor
5
Defrosting tray
2
Air intake area with air filter
6
Condensate drain pipe for
condensate drain hose
3
Water collecting tank
7
Handle for removing the
refrigeration circuit
4
Bucket locking device
8
Connection for a pump-out kit
or dewpoint kit
,
Fig. 3: Rear view without
water collecting tank
Fig. 4: Defrosting tray
,

Page 9 of 29
4Optional components
Pump-out kit for condensate
Optionally the air dehumidifier can be equipped with a pump-out kit. Ask your
AERIAL dealer for the "pump-out kit". It can be installed in just a few steps and
can be removed just as quickly, too.
Fig. 5: Pump-out kit for air dehumidifier AD 740
1
Sliding connection
3
Cable winder
2
Drain pipe for hose connection
15 x 2 mm
4
Button for manual pumping
(before transport of air
dehumidifier)
,

Page 10 of 29
5Transport and installation
Transport
DANGER
Danger to life due to electric shock!
Touching live parts can lead to death. Spillage of condensate on
live parts can cause electric shock.
Switch off the air dehumidifier via the On/Off switch, and
disconnect the power plug from the socket outlet before
moving the unit.
Empty the water collecting tank.
,
WARNING
Crushing hazard due to loss of stability when used on uneven
surfaces or ramps, uncontrolled rolling-off, slipping or
tipping-over!
Loss of stability or uncontrolled movements may cause serious
injuries and material damage.
The air dehumidifier should be transported upright.
Always secure the air dehumidifier against tipping or
slipping.
Always place the device on a level and firm surface.
For models with castors or wheels use, if required,
additional devices to prevent uncontrolled rolling-off.
Avoid use on ramps or inclined planes; use suitable
equipment to prevent tipping, slipping or rolling.

Page 11 of 29
WARNING
Danger of injury due to unfavourable posture and high
weight!
The air dehumidifier is heavy.
When moving or transporting the device always use the
transport handles.
Lift the device with a colleague or use suitable lifting and
transport equipment, as required.
,
CAUTION
Material damage due to wrong handling of the handle
Do not apply force.
In case of correct handling the handle can be moved
without effort.
,
CAUTION
Material damage
Pulling the power cable may damage the cable.
Always disconnect the power plug from the socket outlet
before transport.
Always use the carrying handles to transport the air
dehumidifier.
Free air circulation must be ensured. The air openings –
also the rear and lateral openings –must not be covered.
The free space in front of the lamellae and air filter must
be at least 1 meter; however, for optimum air circulation
in the room it should be considerably larger.
+
1. Report any obvious damage to the carrier, parcel service, postal service etc.
immediately on delivery and note down the damage on the shipping
document or carrier's document.
2. Remove the packaging material completely and dispose of according to the
local regulations.
3. Check the delivery (refer to page 6) for completeness.
4. Should any transport damage be detected after unpacking of the air
dehumidifier, or should the delivery be incomplete, contact your salesman in
charge or specialized dealer without delay.

Page 12 of 29
We recommend to keep the packaging to ensure safe shipment of
the air dehumidifier in case of any warranty claim.
5. Use the carrying handles to transport the air dehumidifier to the place of
installation.
Installation
Proceed as follows to install and transport the air dehumidifier:
1. Install the air dehumidifier in a place in conformity with the operating
conditions on a flat surface (see below).
2. Ensure that the condensate can always be reliably collected or discharged.
Operating conditions
Air dehumidifiers are intended for mobile or stationary use in closed rooms, on
building sites, in water works, indoor swimming pools, garages and storage
rooms.
The air dehumidifiers works without problems in the temperature range from +1
deg. C to +34 deg. C and in the humidity range from 35 to 99 percent relative
humidity.
In case of lower or higher temperatures, the unit switches off automatically.
Using the appliance in rooms with lower temperatures is inefficient and can
result in icing.
Storage of the air dehumidifier at impermissible temperature conditions can
result in damage / problems in case of immediate switching-on.
In case of storage below 0 °C the device must first be allowed to acclimatize to
the room temperature before use. Therefore allow the air dehumidifier to adjust
to the temperature before switching it on.
The suitable location for the air dehumidifier features:
230 V / 50 Hz power outlet
Flat ground
Free space of 1 meter minimum in front of the air outlet lamellae and air
filter, better more!

Page 13 of 29
Select the location in a way to ensure optimum circulation of the dehumidifier air
in your room.
The air dehumidifier must be installed on a flat ground.
By using an air dehumidifier humidity values of 30% r. h. can be
reached. If lower values are required an adsorption dryer must be
used. Contact your technical advisor.
In case of doubts about the operating conditions your technical advisor can help
you.
Electrical connection
DANGER
Danger to life due to electric shock
Prior to commissioning the technical data of the air
dehumidifier must be compared with the conditions
prevailing in the room of installation!
The following items must be checked prior to electrical connection of the air
dehumidifier:
The mains voltage must be in conformity with the voltage of the air
dehumidifier!
Socket outlet and supply system must be sufficiently fused!
In damp locations or on building sites a residual current circuit breaker must
be installed!
The appliance coupler must be suitable for the building socket outlet!
The socket outlet used must be grounded properly!
Connect the power cable to the power outlet.
Connect condensate drain hose
CAUTION
Material damage / insufficient performance due to improper
connection of condensate drain hose
Without water collecting tank The rear hose end must be
in a lower position than the front hose end (drain pipe):
minimum slope 5%, i. e. 5 cm / meter.
Do not immerse the hose end in water (water back-up
may occur).
Never bend the hose.

Page 14 of 29
Do not place any objects on the hose.
Check regularly whether condensate is properly
discharged.
Fig. 6: Cover plate with
water collecting tank
Fig. 7: Cover plate without
water collecting tank
,
1. Unlock the water collecting tank at the bucket locking device (fig. 2, item 4 on
page 8).
2. Remove the water collecting tank.. The cover plate behind it is not in front of
the recess (fig. 6).
3. Slacken the screw on the upper cover plate, and position the cover plate in
front of the recess (fig. 7). Retighten the screw.
4. Attach the condensate drain hose to the condensate drain pipe (Fig. 2, item 6)
and fix it with a hose clamp.
5. Lay the hose with a slope (min. 5%, i.e. 5 cm / per meter) from the air
dehumidifier to an outlet.
If the air dehumidifier is placed in an elevated position, the hose
can also be directed down through the hole in the device bottom.

Page 15 of 29
6Operation and operator control
CAUTION
Danger of injury and damage to appliance
Inadmissible ambient conditions or improper operation of the air
dehumidifier may constitute a risk.
Read the instruction manual before commissioning the air
dehumidifier.
Operating elements
Fig. 8: Operating panel
1
Current room humidity
7
Watt meter (MID)
2
Arrow key for increasing
room humidity
8
Display for water collecting tank full
3
Target room humidity
9
Info button
4
Arrow key for decreasing
room humidity
10
Night mode
5
Stepwise fan setting
11
Operating hours
6
On / off switch
12
Display
,

Page 16 of 29
The energy consumption of the units connected to the unit socket (figure 1, item
6 on
page 7) is not counted by the calibrated watt meter (item 7).
Commissioning
The air dehumidifier must have been properly installed and connected (chapter 5,
from page 10) before it can be commissioned.
Before commissioning the air dehumidifier allow it to rest in its
final position for about 15 minutes after transport. During this
time, the oil distributed in the cooling system and churned up by
transport will flow back to the compressor. This procedure will
extend the service life of the compressor.
1. Connect the power cable to the power outlet.
2. Ensure that the water tank is installed in the air dehumidifier or a drain hose
(option) has been properly fitted and laid to a collecting vessel or an outlet.
3. Press the On/Off button (Fig. 8, item 6) on the operating panel. If the air
dehumidifier has been correctly connected and the existing humidity is higher
than the set humidity value, the air dehumidifier will start to work. The last
values for hygrostat, language and fan step are taken over, where applicable.
Operator control
1. Use the arrow keys for lowering or increasing the room humidity to set the
requested humidity.
If the existing humidity is higher than the set value, the air dehumidifier will
start to work. If the existing humidity is lower than the set value the air
dehumidifier will not start to work.
During operation condensate is produced. This condensate can either be fed
directly to an outlet via the condensate drain hose or collected in the water
tank. The air dehumidifier switches off when the water collecting tank is full.

Page 17 of 29
2. Empty the water collecting tank as soon as it is full. In this case the red lamp
on the operating panel is on. After re-inserting the water tank into the air
dehumidifier, the air dehumidifier switches automatically on again.
Automatic defrosting:
During dehumidification ice may build up on the evaporator. The volume of ice
depends on the ambient conditions in the room to be dehumidified.
The air dehumidifier features automatic hot-gas defrosting. If the evaporator ices,
the unit will defrost automatically. After defrosting the air dehumidifier works
again in the standard dehumidification mode.
For living space, climate conditions of 20 –25 °C and 55 –65% r. h.
are recommended. For quick building drying the hygrostat is set to
continuous operation.
For drying and keeping rooms with wood furnishing (e. g. parquet
flooring) or paintings, antiques etc. dry, a minimum moisture of 55
–60% must be observed.
In case of doubt please contact your technical advisor.
Butto
n
Press briefly
Press for 5 s
Display
Lower the room humidity
in 1 percent steps
Lower the
room humidity
in 5 percent
steps
Increase the room
humidity in 1 percent
steps
Increase the
room humidity
in 5 percent
steps
Switching on the air
dehumidifier
Switching off the air
dehumidifier
(flashing)
Stop
Start
45% 12345h

Page 18 of 29
Changing the fan steps
Step 2: Increased fan
performance
Step 1: Lower fan
performance
When "Stop" or "Start" flashes on the display, operation is impossible.
Set language
Butto
n
Press briefly
Press for 5 s
Display
Switching off the air
dehumidifier
(flashing)
Press 1 x Temperature
display of humidity sensor
Press 2 x
Language display
12
Key lock activated if no key
or button is pressed for 2
min. after switching-on. "Key
lock" appears if arrow or fan
button is pressed.
Key lock
deactivated
by pressing
info button
Language
English
Key lock
deactivated
Key
80% room 22C
Verd. -12C
45% 12345h
Stop
fan speed high
fan speed low