Aerial AD 750 Series User manual

MADE IN GERMANY
EN
INSTRUCTION MANUAL
Air dehumidifier
Series
AD 750 / AD 750-P / AD 780-P

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

INHALT
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1Notes on this instruction manual____________________________________________ 2
Target groups ______________________________________________________________ 2
Conventions _______________________________________________________________ 2
2Safety ____________________________________________________________________________ 3
Safety devices______________________________________________________________ 3
Hazards from accessories__________________________________________________ 3
Authorized operator _______________________________________________________ 3
Safety instructions _________________________________________________________ 4
3Performance description______________________________________________________ 5
Designated use ____________________________________________________________ 5
Device description _________________________________________________________ 6
4Transport and installation ____________________________________________________ 7
Transport __________________________________________________________________ 7
Installation_________________________________________________________________ 9
Operating conditions_______________________________________________________ 9
Electrical connection ______________________________________________________10
Condensate drain 750_____________________________________________________10
Condensate drain 780_____________________________________________________11
Condensate pump ________________________________________________________ 11
Automatic defrosting______________________________________________________12
5Operation and operator control ____________________________________________13
Operating elements and operation________________________________________13
Hygrostat control _________________________________________________________15
Commissioning ___________________________________________________________16
6Maintenance and service ____________________________________________________18
Cleaning and inspection___________________________________________________20
Spare parts and customer service_________________________________________ 21
7Troubleshooting _______________________________________________________________21
Troubleshooting __________________________________________________________21
8Shutdown, storage and disposal____________________________________________26
Shutdown_________________________________________________________________ 26
Storage ___________________________________________________________________26
Disposal __________________________________________________________________26
9Specifications __________________________________________________________________27
10 EC Declaration of Conformity________________________________________________28

NOTES ON THIS INSTRUCTION MANUAL
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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

SAFETY
Page 3 von 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 750 / AD 750-P / AD 780-P 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.
Responsibilities for the various activities on the air dehumidifiers must be clearly
defined and observed. Unclear competencies are a safety risk.

SAFETY
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 7.4.
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.

PERFORMANCE DESCRIPTION
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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 dehumidifiers are designed exclusively for dehumidifying air at
atmospheric pressure.
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 9).
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
One instruction manual

PERFORMANCE DESCRIPTION
Device description
Fig. 1: Air dehumidifier AD 750 / AD 750-P / AD 780-P
1
Moist indoor air
5
Water bucket
2
Dry air
6
Compressor
3
Evaporator
7
Fan
4
Condenser
The AD air dehumidifier is intended exclusively for air dehumidification in closed
rooms. The air dehumidifier can prevent the formation of condensation water,
remove excessive humidity and keep humidity at a defined constant level. 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
device is installed.
The AD air dehumidifier works on the principle of condensation with heat
recovery. The fan draws the moist air in through a cooling coil (evaporator). In the
cooling coil the air is cooled so far below the dew point that the water steam of
the air condenses and flows into a water collecting tank. The cooled and dried air
is re-heated at the condenser. Due to the heat pump effect the output air is a few
degrees warmer than the room air drawn in. The resulting energy gain can reach
3 times the electrical energy consumption.
Permanent circulation of the room air through the device continuously reduces
the absolute humidity of the air. The excessive humidity is removed gently and
excessively.

TRANSPORT AND INSTALLATION
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4Transport 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.

TRANSPORT AND INSTALLATION
WARNING
Danger of injury due to unfavourable posture and high
weight!
The air dehumidifier is heavy.
Lift the device with a colleague or use suitable lifting and
transport equipment, as required.
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 Scope of delivery, page 5) 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.
We recommend to keep the packaging to ensure safe shipment of
the air dehumidifier in case of any warranty claim.

TRANSPORT AND INSTALLATION
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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
Series AD 7 air dehumidifiers are suitable for use on building sites, in water
works, residential buildings, indoor swimming pools, garages and storage rooms.
AD air dehumidifiers work without problems in the temperature range from +3 to
+32 °C and at a relative humidity in the range from 40% to 95% r.h.
Optionally the device can be supplied with an integrated ThermoLogic (optional
special equipment). This system will automatically switch off the appliance in case
of impermissible temperatures, and automatically switch it on again when
permissible temperatures are reached.
Using the appliance in rooms with higher temperatures will cause damage to the
compressor. Using the appliance in rooms with lower temperatures is inefficient
and can result in icing.
Storage of the dehumidifier at impermissible temperature conditions can result
in damage / problems in case of immediate switching-on. Therefore allow the
appliance 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!
Select the location in a way to ensure optimum circulation of the dehumidifier air
in your room. The free space in front of the lamellae and the air filter must be at
least 1 metre. The air dehumidifier must be installed on a flat ground.

TRANSPORT AND INSTALLATION
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. Ask 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!
If indoor swimming pools or damp locations are concerned, has an
RCCB been installed?
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.
Condensate drain 750
Standard equipment of the air dehumidifier AD 750 comprises a collecting tank
(12 l) and a 15 mm connection for the drain hose.
The water bucket is located on a rocker in the appliance. The rocker is actuated
by the weight of the full bucket, and the device is switched off. Switch the
appliance off using the On / Off switch, and empty the water bucket. After the
water bucket has been put back into the appliance switch the appliance on again.

TRANSPORT AND INSTALLATION
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A 15 mm connection pipe is located above the water bucket. Remove the water
bucket if you want to discharge the condensate produced directly into an outlet.
Attach a 15 mm hose to the drain pipe and secure it using a hose clip. Proceed
carefully in order not to break the drain pipe out of the condensate pan.
Lay the hose with a slope (min. 5 cm / per metre) from the appliance to the outlet.
Condensate drain 780
The air dehumidifiers AD 750-P and AD 780-P come with a condensate pump as
standard. Description: refer to next section
Ensure that the condensate can always be reliably collected.
Condensate pump
Appliances with an integrated condensate pump are provided with a connection
pipe for a 12 mm single-hand plug or hose on the rear panel.
In addition there is a red button on the rear panel. This button is used to empty
the pump manually, for example before transport of the device.
We recommend to empty the pump whenever the air dehumidifier is to be
transported, because otherwise water may flow out when the device is tilted.
The integrated pump can pump the condensate up to 4 metres max. above the
dehumidifier.
The pump has its own water reservoir, i.e. only when a defined water level is
reached the pumping process is automatically started.
In case of a pump fault (= critical water level in the water reservoir is exceeded)
the complete dehumidifier is switched off as a precaution. (red pilot lamp –see
chapter 5 Operation and operator control, page 13).

TRANSPORT AND INSTALLATION
Automatic defrosting
In the dehumidification mode ice may build up on the evaporator. The volume of
ice depends on the ambient conditions in the room to be dehumidified.
The dehumidifier is equipped with an automatic hot-gas defrosting system.
This causes automatic defrosting of the appliance depending on the extent of ice
build-up according to the following principle:
The temperature sensor monitors the status in a critical area of the evaporator.
It transmits the defrost signal to the DryLogic which will determine the defrosting
demand and automatically start the defrost cycle. During the defrost cycle the
compressor continues to run whereas the fan is stationary.
Subsequently the air dehumidifier resumes work in the standard
dehumidification mode.

OPERATION AND OPERATOR CONTROL
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5Operation 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 and operation
Fig.2: Operating panel AD 750 / AD 750-P and AD 780-P

OPERATION AND OPERATOR CONTROL
1
Operating hours counter
7
On / Off switch
2
red pilot lamp: on AD 750 =
appliance has switched off,
because water bucket full.
on AD 780-P or AD 750-P with
pump = fault on condensate
pump, appliance has switched
off.
8
Note: Observe distance in
front of air inlet and outlet.
3
red pilot lamp (optional) =
ThermoLogic (opt. extra) has
switched off. The ThermoLogic
will switch the appliance off
when the temperature is outside
the permissible range
(temperature < +3°C, or
temperature > +32°C) and switch
it on again when a permissible
temperature is reached.
9
Note: Operate appliance only
in upright position.
4
green pilot lamp (standard) =
appliance is in defrost mode, i.e.
the compressor remains in
operation while the fan is
stationary. (hot-gas defrosting
system)
10
Note: Ensure that the
condensate is discharged
into a tank or drain.
5
orange pilot lamp (standard) =
The appliance has switched off
because the relative humidity set
on the hygrostat has been
reached.
11
Note: Close windows and
doors during
dehumidification.
6
Hygrostat
12
Note: Check and clean air
filter regularly!
The operating hours counter must not be used for billing the
power consumption. The kWh display of the MID counter HW 66
M is calibrated and can be used for billing.

OPERATION AND OPERATOR CONTROL
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Hygrostat control
The series AD 7 air dehumidifiers are equipped with a hygrostat on which a
desired humidity value can be set. This will cause the air dehumidifier to switch
on when the ambient humidity is above the set value. When the humidity drops
below this value the appliance will switch off. The hygrostat is arranged in the top
part of the operating panel.
Fig. 3: Operating panel
Pos. 0
Appliance is switched off
60%
The dehumidifier will switch off at
a relative humidity of approx. 60%,
and switch on again when a
humidity of 60% is exceeded.
Pos. 1
Appliance operates in
continuous mode
40%
The dehumidifier will switch off at
a relative humidity of about 40%,
and switch on again when a
humidity of 40% is exceeded.
80%
The dehumidifier will
switch off at a relative
humidity of approx. 80%,
and switch on again
when a humidity of 80%
is exceeded.
20%
The dehumidifier will switch off at a
relative humidity of approx. 20%,
and switch on again when a
humidity of 20% is exceeded.

OPERATION AND OPERATOR CONTROL
Continuous adjustment of the hygrostat allows for easy humidity control. If very
precise setting values are required, use a hygrometer with a precise humidity
display to set the hygrostat.
Please note:
By using a condensation dryer humidity values of 40 –45% r. h. minimum can be
reached. If lower values are required an adsorption dryer must be used.
Contact your technical advisor.
Comfortable ambient climate:
For living space, climate conditions of 20 –25 °C and 50 –60% r. h. are
recommended. For quick building drying the hygrostat is set to continuous
operation (Max pos.). For drying and keeping rooms with wood furnishing (e.
g. parquet flooring) or paintings, antiques etc. dry, a minimum humidity of 55
–60% must be observed.
In case of doubt please contact your technical advisor.
External humidity control (optional):
Optionally the AD 7 series is available with connection facility for external On/Off
control, for example via a dew point sensor or an external hygrostat.
In this case the appliance will be equipped with our SensorLogic providing a
potential-free contact and a supply voltage of 24 V.
Instead of the hygrostat, an Amphenol socket is arranged in the operating panel.
With the suitable Amphenol connector (accessory) your external control can be
easily connected.
Commissioning
The air dehumidifier must have been properly installed and connected 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.

OPERATION AND OPERATOR CONTROL
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1. Connect the power cable to the power outlet.
2. Check whether the water bucket (AD 750) is installed in the appliance or the
drain hose (standard on AD 780, optional on D 750) has been properly fitted
and laid to an external collecting vessel or an outlet.
3. Set desired humidity value on hygrostat (see hygrostat control, page 14).
4. Press the On/Off button (item 7) 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.
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.

MAINTENANCE AND SERVICE
6Maintenance and service
WARNING
Danger of injury by electric shock and risk of material
damage!
Always observe the general safety instructions when
performing any maintenance and service work!
Switch the air dehumidifier off and pull the power plug
before cleaning and inspection.
Entrust only trained expert staff with inspection and any
work inside the air dehumidifier.
,
WARNING
Danger of burns due to contact with hot surfaces of the
cooling circuit!
Work on inside components may only be carried out by
the manufacturer or personnel authorised by the
manufacturer.
,
WARNING
Danger of suffocation due to refrigerant leakage in closed
rooms during maintenance work!
Work on inside components may only be carried out by
the manufacturer or personnel authorised by the
manufacturer.
,
WARNING
Dust hazard!
During cleaning with compressed air dust is released into the
atmosphere.
Clean foam filter from outside and inside with a vacuum
cleaner, if necessary wash and dry it.
Clean the device with compressed air only in an open
environment;
wear protective mask and protective goggles during this work.