elco AEROTOP L 054 User manual

User Manual
For Authorized Service Technicians
AEROTOP L Air-Water Heat Pump
for outdoor installation
01/2021 no. 420011134100
www.elco.net
en

2
Table of Contents
If the warnings are not
observed, it can result in
injuries or mortal danger.
If indications to hazards are
not observed, this can result
in risks and in some cases to
considerable damages.
Symbol for additional
information and instructions
Used symbols
General Information
Table of Contents................................................................................. 2
Intended use,
Safety instructions and regulations ...................................................... 3
Product description
Features............................................................................................... 6
Technical data...................................................................................... 7
Refrigerant information......................................................................... 8
Scope of delivery ................................................................................. 9
Operating conditions ............................................................................ 9
Installation
General notes on delivery, handling and transport............................. 10
General notes Safety areas and functional distances ........................ 12
Dimensions and safety areas............................................................. 14
Water quality ..................................................................................... 16
Hydraulic connections ........................................................................ 18
Quick guide ........................................................................................ 20
Modular configuration units ................................................................ 21
Electrical connections
General notes..................................................................................... 24
Devices inputs and outputs ................................................................ 25
Configurations on the digital display................................................... 27
Device addressing ............................................................................. 28
Modbus
General notes..................................................................................... 30
Addresses read and write .................................................................. 31
Query status and error ....................................................................... 33
Start-up
General notes..................................................................................... 35
Preliminary checks ............................................................................ 38
Adjustments
General notes..................................................................................... 40
Menu structure ................................................................................... 42
General settings................................................................................. 44
Operating parameter selection........................................................... 47
Troubleshooting
General notes..................................................................................... 53
Status display .................................................................................... 54
Error codes and troubleshooting ........................................................ 56
Maintenance
Safety warnings for R32 gas appliances............................................ 60
General notes..................................................................................... 64
Cleaning............................................................................................. 65
Log ..................................................................................................... 66
Shut down .......................................................................................... 67
Replacement safety valve refrigerant circuit....................................... 68
Decommissioning............................................................................... 69

3
General information
Intended use,
Safety instructions and regulations
In these cases it is necessary to pro-
vide a heating pipeline. A functional
heating or heat pump ready pose in
according to the DIN EN 1264 should
be only taking into account the above
conditions. Furthermore, keep in mind
that after the sizing of the heat pump
for normal operation may not be pos-
sible to generate all the necessary
thermal power.
Observe the following guidelines:
 Comply with the regulations and
requirements of the manufacturer of
mortars for screed coat!
 Correct operation is only possible
with a system installed in a work-
manlike manner (the hydraulic, elec-
trical, settings)!
 Otherwise, the screed coat may be
damaged!
Low energy consumption use of
the heating with heat pump
The decision to opt for a heating sys-
tem with heat pump is a valuable con-
tribution to protecting the environment
by reducing emissions and reduced
use of primary energy. In order for the
new heating system will work efficient-
ly, note the following points:
The heating system with heat
pump must be sized and installed
with care.
The lower is the flow temperature
of the heating water side, the
more efficient is the operation of the
heat pump.
Give preference to a short-term
intensive aeration of the premis-
es. Compared to the windows always
open in the tilted position, this imme-
diate ventilation reduces the con-
sumption of energy.
General information
 The calculations, sizing, installations
and putting into service related to
the products described in this docu-
ment may only be carried out by
qualified specialists
 Comply with the requirements of
local law, which may differ from the
information contained herein
 Subject to change.
These instructions are for a proper
installation, adjustment and mainte-
nance of the machine. It is therefore
necessary to read carefully the in-
structions given below and to install,
test and maintain the heat pump by
technicians qualified by specific train-
ing.
At the end of the warranty period, the
manufacturer assumes no responsibil-
ity for mechanical, hydraulic or electri-
cal changes.
In the case of operations not express-
ly authorized, executed in violation of
these instructions, the warranty will
become void with immediate effect.
During the installation must meet the
specific safety statements. Check that
your mains supply correspond to the
data of the heat pump (nameplate).
These instructions and the wiring dia-
gram of the heat pump should be
stored with due care and, if neces-
sary, be made available to the per-
sonnel responsible
The manufacturer declines any re-
sponsibility for damage to persons or
property caused directly or indirectly
from failure to follow these instruc-
tions. The housing may only be
opened by a qualified techni-
cians.
Limitations and Guidelines
The construction and the manufacture
of heat pump meets all the require-
ments of European standards. (See
EC Declaration of Conformity). The
electrical connection of the heat pump
must be performed in compliance with
the applicable ASE, EN and IEC.
Should also observe the connection
conditions of the local energy supply
Warranty Conditions
Our performance guarantee shall
lapse for damage due to:
 misuse or non standard use
 installation or commissioning correct
by the purchaser or from other.
 Use of the system with pressure
excessive or outside the factory
values
 Failure to follow directions in the
instructions for use
The warranty for heat pumps for heat-
ing is 24 months from the date of de-
livery. For the rest, the conditions of
sale, delivery and warranty in accord-
ance with the order confirmation.
Control Input
The units are delivered with an ade-
quate protective packaging. Upon
delivery, check the unit for shipping
damage and that the budget is com-
plete.
If damage is found, they must be
reported immediately to the
transport document with a warning:
"Acceptance qualified as a result of
blatant corruption."
Given that overloading can
cause serious damage to heat
pump and plant heat source side, it is
forbidden to operate the heat pump if
the following conditions exist:
 drying of the construction.
 plant is not completed (building
shell).
 windows and exterior doors are not
finished and closed.

4
General information
Intended use,
Safety instructions and regulations
The precautions in this manual are
divided as indicated on the side. They
are important, so make sure you fol-
low them closely. Please read these
instructions carefully before installing.
Keep this manual handy for future
reference. This unit contains fluori-
nated gases. For specific information
on gas types and quantities, please
refer to the plate found on the unit.
Please contact your dealer for
future assistance.
 An incorrect installation of equip-
ment or accessories may provoke
electric shocks, short circuits, leaks,
fire or other damages to the equip-
ment. Make sure you only use ac-
cessories provided by the supplier -
which are designed specifically for
the equipment - and make sure they
are installed by a professional.
 All activities described in this manu-
al must be performed by authorised
technicians. Make sure to wear suit-
able personal protection such as
gloves and safety goggles while
installing the unit or performing
maintenance operations.
 Switch off the power switch before
touching electrical components and
terminals.
 When the service panels are re-
moved, the live parts can easily be
touched by mistake.
 Never leave the unit unattended
during installation or maintenance
operations while the service panel is
removed.
 Do not touch the water pipes during
and after performing welding or
junction work as the pipes may be
very hot and you may burn your
hands. To avoid lesions, wait until
the pipes return to a normal temper-
ature or make sure you are wearing
protective gloves.
 Do not touch any switch with wet
hands. Touching a switch with wet
hands may lead to electric shock.
 Maintenance operations must
be performed as recommended
by the manufacturer. Maintenance
and reparation operations requiring
the assistance from specialized per-
sonnel must be performed under the
supervision of the person competent
as regards flammable refrigerants.
 Tear and dispose of plastic bags so
that children may not play with
them. Children playing with plastic
bags risk choking.
 Some products use PP packaging
straps. Do not pull the straps or use
them to lift or move the product. It
may be dangerous should the straps
break.
 Dispose safely of packaging materi-
al such as nails or other metal or
wooden parts that may cause le-
sions.
 Ask your dealer or qualified person-
nel to perform installation operations
according to this manual. Do not
install the unit yourself. An incorrect
installation may cause water leaks,
electric shock or fire.
 Make sure to only use accessories
and parts specified for installation
operations. Failing to use specific
parts may cause water leaks, elec-
tric shock, fire or the unit falling from
its support.
 Install the unit on a structure that
can withstand its weight. An insuffi-
ciently robust structure may lead to
the unit falling causing possible le-
sions.
 Perform installation operations con-
sidering the possibility that strong
winds, hurricanes or earthquakes
may occur. Incorrect installation
operations may lead to accidents
caused by falling equipment.
 Make sure all electrical operations
are performed by qualified person-
nel in accordance with the law, local
regulations and this manual.
 Connect the unit to a separate pow-
er supply circuit. An insufficient ca-
pacity of the power supply circuit or
incorrect connections may lead to
electric shock or fire.
 Make sure to install an addi-
tional differential circuit-breaker
against a leakage to earth compli-
ant with the law and local regula-
tions: omnipolar circuit breaker, at
least 3 mm separation in all poles,
residual current device (RCD) with
a rated value not exceeding 30 mA.
 Failing to install a differential circuit-
breaker may lead to electric shock
and fire.
 Make sure all the wiring is safe. Use
the specified wires and make sure
terminal connections and wires are
protected against the water, exter-
nal forces or other phenomena.
Incomplete connections or fixing
may cause a fire.
 When connecting the power supply,
arrange the wires so that the front
panel can be fixed properly. If the
front panel is not in position, it may
lead to terminals overheating, elec-
tric shock or fire.
 People working or intervening on a
cooling circuit must hold a suitable
certification issued by an authorised
assessment centre proving their
suitability to handle refrigerants
safely in compliance with a specific
assessment recognised by industry
associations.
 After installation operations are
over, verify that there are no refrig-
erant leaks.
 Never touch the leaking refrigerant
directly, as it may lead to serious
frostbite injuries. Do not touch the
refrigerant pipes during and right
after functioning, as they may be
hot or cold depending on the condi-
tions of the refrigerant flowing
through the pipes, compressor and
other parts of the cooling circuit.
Burns or frostbite may occur if you
touch the refrigerant pipes. If it is
necessary to touch the pipes, wait
for them to return to a normal tem-
perature or wear protective gloves
and clothes.

5
General information
Intended use,
Safety instructions and regulations
 Do not touch the internal parts
(pump, backup heater, etc.) during
and immediately after functioning.
Touching internal parts may cause
burns. To avoid lesions, wait until the
internal parts have returned to a
normal temperature or, if touching
them is necessary, wear protective
gloves.
 Do not use other means than those
recommended by the manufacturer
to hasten the defrosting or cleaning
process.
 The equipment must be placed
somewhere without continuous igni-
tion sources (e.g. open flame, a gas-
operated device or an electric heat-
er).
 Do not pierce nor burn.
 Be aware that refrigerants are odour-
less.
 Place the unit on the ground.
 The earth resistance should comply
with the law and local regulations.
 Do not connect the earth cable to
gas or water mains, lightning rods or
phone earth cables.
 Incomplete earthing may cause elec-
trical shocks.
 Gas mains: fires or explosions may
occur in case of a gas leak.
 Water mains: rigid vinyl tubes are
not effective.
 Lightning rods or phone earth ca-
bles: the electrical threshold can
increase abnormally if hit by light-
ning.
 Install the power supply cable at
least one metre from TVs or radios
to prevent interferences or disturb-
ances. Depending on the type of
radio wave, one metre may not be
enough to avoid disturbances.
 Do not wash the unit as it may cause
electric shocks or fires.
 If the power supply cable is dam-
aged, it must be replaced by the
producers, personnel from its assis-
tance network or qualified personnel.
 Do not touch the fins of the heat
exchanger as they may cause injury.
Do not install the unit in the fol-
lowing places:
 Where there is mineral oil, even in
form of vapour. Plastic parts may
deteriorate, disperse and cause wa-
ter leaks.
 Where corrosive gases (such as
sulphurous acid) are produced.
 Where the corrosion of copper pipes
or welded parts may cause refriger-
ant leaks.
 Where there are devices emitting
electromagnetic waves. Electromag-
netic waves may disturb the control
system and cause malfunctions.
 Where flammable gases may leak,
or carbon fibre or flammable powers
may be found in the air or where
volatile flammable materials such as
paint thinners or petrol are handled.
These gases may cause a fire.
 Where the air contains high levels of
salt, such as the seaside.
 Where the power supply voltage is
subject to fluctuations, such as in
factories.
 On vehicles or ships.
 Where there are acid or alkaline
vapours.
 Prior to installation, verify if the us-
er’s power supply meets the unit’s
installation requirements (including
reliable earthing, differential circuit-
breaker, component size, wire sec-
tion, etc.). If the electrical installation
requirements are not met, the unit
cannot be installed until the electrical
system is rectified.
 Before the hydraulic connection and
electrical wiring operations, verify
that the installation area is safe and
without hidden dangers such as wa-
ter, electricity and gas conduits.
 If installing multiple units in a central-
ised manner, adjust the electric load
on the various phases. Do not con-
nect multiple units to the same
phase of the three-phase supply.
 The following subjects may use the
unit if supervised or instructed on
safe usage and capable of under-
standing the possible dangers: chil-
dren who are minimum 8 years old,
people with no experience or
knowledge, people with limited phys-
ical, sensory or mental abilities.
 Children must not play with the unit.
 Cleaning and maintenance opera-
tions to be carried out by the user
must not be performed by unsuper-
vised children.
 Once the installation is complete, the
unit tested and functioning is normal,
instruct the client as regards the use
and maintenance of the unit as indi-
cated in this manual. In addition,
make sure that the manual is suita-
bly kept for future reference.
DISPOSAL: do not dispose of
this product as unsorted waste.
Contact the local authorities for infor-
mation on the collection systems
available. If electrical equipment is
disposed of in landfills, dangerous
substances may infiltrate the waste
water and enter the food chain, harm-
ing the health and well-being of peo-
ple and animals.
Deactivate the device immediately in
case of failure or malfunction.
Contact a certified service representa-
tive.
Use only original spare parts.
Use of the device in case of malfunc-
tion failure:
 effective warranty
 it may affect the safety of the device
 it may increase time and repair costs
In case of failure or malfunction
 Deactivate the device immediately
 Contact a service center authorized
by the manufacturer
The installer must train the user,
especially regarding:
 Startup / shutdown
 Set points change
 Standby mode
 Maintenance
 What to do / what not to do in case
of failure

6
Product description
Features AEROTOP L
High Degree of Efficiency and
Optimized Defrosting
Thanks to the correspondingly dimen-
sioned air heat exchanger as well as
the unique defrosting system, the
AEROTOP M heat pump is especially
efficient and a cost-saver. This heat
pump always exceeds the required
degree of efficiency (coefficient) of 3.0
(COP at A2W35).
Frost forms on the air exchanger, the
evaporator, if the exterior temperature
is less than 5°C. This results in ice
formation and as a consequence re-
duced the heat exchange and with
that the efficiency of the heat pump.
The evaporator must be defrosted to
remove this frost or ice. However, the
defrosting process, carried out by the
AEROTOP M by reversing the cooling
circuit, is cumbersome since the heat
pump does not yield any energy dur-
ing the defrosting process but still
uses electricity. However, this is fre-
quently unnecessary since frost for-
mation depends on the humidity in the
air.
Instead of the unnecessary defrosting
at timed intervals, the AEROTOP M
determines the correct time to defrost
the unit using a progressive and well
thought out logic with different perfor-
mance parameters in the cooling cir-
cuit. Thanks to this procedure, the unit
rarely requires any defrosting during
winter, if any at all, which is a great
advantage.
Cooling with AEROTOP L
The purpose of heat pumps is primari-
ly to supply a building with heat. How-
ever, the technology can also be used
to cool a building in the summer. This
involves actively generating the cool-
ing energy through a process reversal
of the heat pump. In case of distribu-
tor systems specifically designed for
cooling (fan coil or similar), the cool-
ing capacity of the heat pump can be
transferred optimally to the building.
Cooling ceilings also have a good
cooling capacity and comfort level.
Floor heaters, however, are only par-
tially suited and provide a limited cool-
ing effect. Radiator heaters are un-
suitable.
Quiet Operation
The air-water heat pump AEROTOP
M is characterized by comparatively
very low noise emissions. This is pos-
sible thanks to the high-performance
fan, the very advantageous air rout-
ing, the noise--dampening insulation
of the cladding, as well as the multi-
dampened support of the cooling cir-
cuit. However, incorrectly integrating
constructional components may result
in undesired noise increases if the
conditions are unfavorable.
Flexible and Space-Saving
Some air-water heat pumps are rela-
tively bulky due to the required cross-
sections for the air ducts or applica-
tion options are severely limited.
Thanks to the clever utilization of the
geometric properties of the radial fan,
AEROTOP M are among the most
flexible, space saving air-water heat
pumps.

7
Product description
Technical data
AEROTOP L 054 061 065 079 088
Cooling performances (EN14511:2018) kW 53,1 58,8 72,4 78,4 85,3
- A35 / W18 kW 62,4 72,3 89,2 95,1 107
- Electrical absorption
(EN14511:2018) kW 18 20,3 23 25,3 29,3
- EER (EN14511:2018) 2,95 2,90 3,15 3,10 2,91
- SEER 4,57 4,51 4,64 4,62 4,5
Heating performances (EN14511:2018) kW 53,3 66,7 79,1 85 91,2
- A-7 / W35 kW 39,4 47,9 55,2 60,4 65,9
- A2 / W35 kW 50,4 59,4 70,7 76,8 83,7
- Electrical absorption
(EN14511:2018) kW 16,6 20,8 23,8 25,8 28,1
- COP (EN14511:2018) 3,21 3,21 3,33 3,29 3,25
Number of compressors 2
Cooling cyrcles 1
Type of compressor ROTARY INVERTER SCROLL INVERTER
Standard power supply 400/3/50+N
Maximum inrush current I max. 46 46 60,2 60,2 60,2
Sound pressure level dB(A) 64 65 62 65 67
SCOP - W35 4,04 4,03 4,08 4,07 4,06
min. Buffer dimensioning L1000 1500
Suggested piping dimensions
- Cooling DN 80 100 100 125 125
- Heating DN 65 65 80 80 80
Volumetric flow rate
- Cooling dT 3K m3/h 17,99 20,84 24,53 25,71 30,84
- Heating dT 7K m3/h 10,98 11,52 15,37 16,56 17,28
Standard Air flow rate m3/h 24800 24800 37199 37199 37199
Length mm 2337 2337 3190 3190 3190
Width mm 1130 1130 1130 1130 1130
Height mm 2152 2152 2155 2155 2155
Minimum free space side mm 800
Minimum free space front/back mm 500
Minimum free space above mm 6000
Weight kg 580 580 780 780 780
ErP Energy efficiency - W35 A++ A++ A++ -

8
Product description
Refrigerant information
This product contains fluorinated
greenhouse gases covered by the
Kyoto protocol. Do not discharge gas
into air.
Refrigerant type: R32
Characteristics of R32 refrigerant:
 minimum environmental impact
thanks to the low Global Warming
Potential GWP
 low flammability, class A2L
according to ISO 817
 low combustion speed
 low toxicity
The refrigerant quantity is indicated
on the unit plate
Quantity factory-loaded refrigerant
and equivalent CO2 tons:
AEROTOP L Refrigerant (Kg) Equivalent CO2 tons
54, 61k 15 10
65, 79, 88 21 14
Physical characteristics of the R32 refrigerant
Safety class (ISO 817) A2L
GWP 675
LFL Low flammability limit 0.307 kg/m3 @ 60°C
BV Burning velocity 6,7 cm/s
Boiling point -52 °C
GWP 675 100 yr ITH
GWP 677 ARS 100 yr ITH
Self-ignition temperature 648 °C

9
Product description
Scope of delivery - Operating conditions
Operation and installation manual 1
Total water probe 1
Transformer 1
Wired controller installation manual 1
Operation conditions of
the unit
1. The standard power supply voltage
is 380-415V 3N~50 Hz, the mini-
mum allowable voltage is 342 V,
and the maximum voltage is 456 V.
2. To obtain a better performance, use
the unit at the following outdoor tem-
perature.
Operating Limits
The diagrams on the left show the
operating limits of the AEROTOP L
heat pumps. The temperature differ-
ence at the condenser must fall be-
tween 5°C and 8°C.
In order to prevent a reduction of the
operating limits:
 The minimum flow values referred to
the condenser must not be exceed-
ed towards the minimum to ensure
correct performance and trouble-
free operation.
 The pipes must be kept as short as
possible to reduce loss of head, and
their insulation must be according
national standards to minimize heat
losses. Incorrectly sized pipes can
cause faults and breakdowns, re-
sulting in damages to the heat pump
in addition to a drop in performance.
Operating cooling interval
Twu [°C] = Leaving exchanger water temperature
Tae [°C] = External exchanger inlet air temperature
1Normal operating range.
2Operating range where the use of ethylene glycol is
mandatory in relation to the temperature of the wa-
ter at the outlet of the user side exchanger.
Outdoor air temperature (°C)
Outlet water temperature (°C)
Operating heating interval
AEROTOP L54-61kW
Outdoor air temperature (°C)
Outlet water temperature (°C
Operating heating interval
AEROTOP L 65 - 88kW
Outdoor air temperature (°C)
Outlet water temperature (°C

10
Installation
General notes on delivery,
handling and transport
Reception
You have to check before accepting
the delivery:
 That the unit hasn’t been damaged
during transport
 That the materials delivered
correspond with that indicated on the
transport document comparing the
data with the identification label
positioned on the packaging.
In case of damage or anomaly:
 Immediately make a note of the
found damage on the transport
document and write the wording:
"Accepted subject to checking due to
evident shortages/damages due to
transport".
 Contact by fax and registered mail
with advice of receipt to supplier and
the carrier.
Storage
Respect the indications on the outside
of the pack.
In particolar:
 Minimum ambient temperature
-20°C (possible components
damages)
 maximum ambient temperature
+45°C (possible safety valve
opening)
 maximum relative humidity 95%
(possible damages to electrical
components
 The unit may not be tilted more than
15° during transport.
Handling
 Verify unit weight and handling
equipment lifting capacity .
 Identify critical points during
handling (disconnected routes,
ramps, steps, doors).
 Use protections not to damage the
unit
Handling by rolling
Place various iron tubes of the same
diameter and with a longer length
than the width of the unit base.
Lifting
 Each lifting rope (belt) should be
able to bear 4 times the weight of
the unit.
 Check the lifting hook of each rope
and make sure it is fixed to the unit.
 To avoid damage to the unit, insert a
protective block made of wood or of
another sturdy material between the
unit and the robe; the thickness must
be at least 50 mm. (A)
 Protect the equipment in a suitable
way to avoid damage.
 Lifting in balance
 Before starting handling, make sure
that the unit is stable.
 Align the center of gravity with the
lifting point
 Gradually bring the lifting belts under
tension, making sure they are
positioned correctly.
It is strictly forbidden to stand
under the machine when it is
lifted.
Removal of packaging
Be careful not to damage the unit.
Recycle and dispose of the packag-
ing material in compliance with local
regulations.

11
Installation
AEROTOP L 54 - 88

12
Installation
General notes
Safety areas and functional distances
Positioning
Consider these elements during posi-
tioning:
 Technical spaces requested by the
unit
 Electrical connections
 Water connections
 Functional clearances
Functional clearances
Functional clearances have the pur-
pose of:
 guaranteeing good unit operation
 allowing maintenance operations
 safeguarding authorised operators
and exposed persons.
respecting the functional clearances
indicated in the SIZE chapter.
Positioning
Units are designed to be installed:
 OUTDOORS
 in permanent position.
Units may be installed on the ground
or on the roof provided that sufficient
ventilation is guaranteed.
If the unit is installed on a roof,
the roof must be sturdy enough
to withstand the weight of the unit and
the weight of maintenance personnel.
Limit the transmission of vibrations:
 use anti-vibration devices or neo-
prene strips on the unit support
points
 install flexible joints on the hydraulic
connections
 The unit must be level
Installation criteria:
Customer approval
 position accessible safely
 technical spaces requested by the
unit
 spaces for the air intake/exhaust
 max. distance allowed by the electri-
cal connections
 install the unit raised from the
ground
 verify unit weight and bearing point
capacity
 verify that all bearing points are
aligned and levelled
 condensate water draining
 consider the maximum possible
snow level
 avoid places that can be subject to
floods
 Protect the unit with a suitable fence
in order to avoid access to unauthor-
ised personnel (children, vandals,
etc.)
Pressure relief valve gas side
The installer is responsible for
evaluating the opportunity of installing
drain pipes in compliance with the
local regulations in force (EN 378).
If ducted, the valves must be resized
according to EN13136
Condensate
When a heat pump is in operation it
produces a considerable amount of
water due to the defrosting cycles of
the external coil.
The condensate must be disposed of
in order to avoid damaging people
and things.
A correct circulation of the air is
mandatory to guarantee the good
unit operating.
Avoid therefore:
 obstacles to the airflow
 ventilation difficulties
 leaves or other foreign bodies that
can obstruct the air coil
 winds that hinder or favour airflow
 sources of heat or pollution close to
the unit (chimneys, extractors etc..)
 Stratification (cold air that stagnates
at the bottom)
 recirculation (expelled air that is
sucked in again)
 positioning below ground level, near
very high walls, underneath roofs or
in corners, which can give rise to
stratification or recirculation phenom-
ena.
 Disregarding the previous indica-
tions may affect energy efficiency or
lead to blocks due to HIGH PRES-
SURE (in summer) or LOW PRES-
SURE (in winter)..

13
Installation
General notes
Safety areas and functional distances
A
B
C
D
E
GF GG F
A = 800 mm
B = 500 mm
C = 800 mm
D = 500 mm
E = 6000
F = 500 mm
G = 500 mm
mm
Anti-vibration mounts
Option
AEROTOP L 54 - 61 65 - 88
support points
Configuration standard standard
KIT PE PESM00003 PESM00005
W1 (odice) PAF 11 SPEC PAF 9 SPEC
W2 PAF 11 SPEC PAF 22 SPEC
W3 PAF 11 SPEC PAF 4 SPEC
W4 PAF 11 SPEC PAF 9 SPEC
W5 - PAF 22 SPEC
W6 - PAF 4 SPEC
W1
W2
W3W4
W1W2W3
W4W5W6
Do not smoke or use open flames within this area

14
Installation
Dimensions and safety areas
AEROTOP L 54 - 61
 Compressor compartment

 Control keypad
 Power input
 Water inlet 2” Victaulic
 Water outlet 2” Victaulic
 DHW inlet**Victaulit 2“
 DHW outlet**Victaulit 2“
 Water tank**
 Pumpe**
 Functional spaces
** Optional
Detail A
Do not smoke or use open flames within this area

15
Installation
Dimensions and safety areas
AEROTOP L 65 - 88
 Compressor compartment

 Control keypad
 Power input
 Water inlet 2” Victaulic
 Water outlet 2” Victaulic
 DHW inlet**Victaulit 2“
 DHW outlet**Victaulit 2“
 Water tank**
 Pumpe**
 Functional spaces
** Optional
Detail A
Do not smoke or use open flames within this area

16
Installation
Water quality
Water quality
Circulators function well exclusively
with clean and high-quality tap water.
The most frequent factors that can
affect circulators and the system are
oxygen, limescale, sludge, acidity
level and other substances (including
chlorides and minerals).
In addition to the quality of water, in-
stallation also plays an important role.
The heating system must be airtight.
Choose materials that are not sensi-
tive to oxygen diffusion (risk of corro-
sion...).
Characteristics of the water
 compliant with local regulations
 Langelier Index (LI) between 0 and
+0.4
 within the limits indicated in the
chart
 Water quality must be checked by
qualified personnel.
Hardness
If the water is hard, install a system
suitable to preserve the unit from
harmful deposits and limestone for-
mation.
If necessary, install a water softener
to reduce water hardness
Cleanliness
Before connecting the water to the
unit, clean the system thoroughly with
specific products effective to remove
residues or impurities that may affect
functioning. Existing systems must be
free from sludge and contaminants
and protected against build-ups.
New systems
In case of new installations, it is es-
sential to wash the entire installation
(with the circulator uninstalled) before
commissioning the central installation.
This removes residues of the installa-
tion process (welding, waste, joint
products...) and preservatives
(including mineral oil). The system
must then be filled with clean high-
quality tap water.
Existing systems
If a new boiler or heat pump is in-
stalled on an existing heating system,
the system must be rinsed to avoid
the presence of particles, sludge and
waste. The system must be drained
before installing the new unit. Dirt can
be removed only with a suitable water
flow. Each section must then be
washed separately. Particular atten-
tion must also be paid to “blind spots”
where a lot of dirt can accumulate due
to the reduced water flow. The system
must then be filled with clean high-
quality tap water. If, after rinsing, the
quality of the water is still unsuitable,
a few measures must be taken to
avoid problems. An option to remove
pollutants is to install a filter. Various
types of filters are available. A mesh
filter is designed to catch large dirt
particles. This filter is usually placed
in the part with the larger flow. A tis-
sue filter is designed to catch the finer
particles.
Exclusions
The warranty does not cover damage
formed by limestone, deposits and
impurities deriving from the water
supply and/or by the malfunctioning of
the system cleaning system.
Risk of frost
 When the outside temperature gets
close to 0°C, the water in the pipes
and unit may freeze.
 Frost may determine irreversible
damage to the unit.
 Frost damage is not covered by the
warranty.
If the unit or hydraulic connections are
subject to temperatures close to 0°C:
 mix water with glycol, or
 safeguard the pipes with heating
cables placed under the insulation,
or
 empty the system in cases of long
non-use
Anti-freeze solutions
Consider that the use of anti-freeze
solution determines an increase in a
pressure drop.
Make sure that the glycol type utilized
is inhibited (not corrosive) and com-
patible with the water circuit compo-
nents.
Do not use different glycol mixture
(i.e. ethylene with propylene).
Water filter
Use filter ≥ 30 mesh
 It must be installed immediately in
the water input of the unit, in a posi-
tion that is easily accessible for
cleaning.
 The filter should never be removed,
doing so invalidates the warranty.
% ETHYLENE GLYCOL
BY WEIGHT 5% 10% 15% 20% 25% 30% 35% 40% 45% 50%
Freezing temperature °C -2-3.9 -6.5 -8.9 -11.8 -15.6 -19.0 -23.4 -27.8 -32.7
Safety temperature °C 31-1-4-6-10 -14 -19 -23.8 -29.4

17
Installation
Water quality
Water component for corrosion limit on Copper
PH 7.5 ÷ 9.0
SO4-- < 100
HCO3- / SO4-- > 1
Total Hardness 8 ÷ 15 °f
Cl- < 50 ppm
PO4 3-< 2.0 ppm
NH3 < 0.5 ppm
Free Chlorine < 0.5 ppm
Fe3 + < 0.5 ppm
Mn++ < 0.05 ppm
CO2 < 50 ppm
H2S< 50 ppb
Temperature < 65 °C
Oxygen content < 0.1 ppm
Sand 10 mg/L0.1 to 0.7mm max diameter
Ferrite hydroxide Fe3O4
(black) Dose < 7.5 mg/L 50% of mass with diameter < 10 µm
Iron oxide Fe2O3 (red) Dose < 7.5mg/L Diameter < 1 µm

18
Installation
Hydraulic connections
Minimum capacity of the ex-
changer
The minimum water flow is indicated
in the technical data.
If the system capacity is below the
minimum flow, bypass the system as
indicated in the diagram.
Maximum capacity of the ex-
changer
The maximum water flow is indicated
in the technical data.
If the system capacity exceeds the
minimum flow, bypass the system as
indicated in the diagram.
Minimum and maximum water flow
AEROTOP L Water flow (l/s)
Minimum Maximum
54 - 61 0.9 2.6
65 - 88 1.8 5.0

19
Installation
Hydraulic connections
1exchanger
2antifreeze heater
3water temperature probe
4drain
5water flow switch
6vent
7system loading safety pressure
switch
8Pump
9pressure relief valve
10 NA
11 shut-off valves
12 filter
13 flexible couplings
14 piping supports
15 exchanger chemical cleaning by-
pass
16 system cleaning bypass

20
Installation
Quick guide
Heat - CoolRemote On - Off
Anti-snow function
Antifreeze heater Signals