elco AEROTOP L User manual

PLANNER MANUAL
Commercial Heat Pump
AEROTOP L
07/2021 Art.Nr. 420011195500
www.elco.net
en

Table of contents
General Information:
Table of contents ..................................................................................3
Features and benefits ...........................................................................4
Standard unit technical specifications ...................................................5
Refrigerant Information .........................................................................6
Built-in options ......................................................................................7
Technical data
Dimensions drawings............................................................................8
Performances......................................................................................10
Construction........................................................................................12
Electrical data .....................................................................................13
Sound levels .......................................................................................14
Sound level correction factors.............................................................15
Correction factors for contamination and glycol .................................16
Overload and control device ..............................................................16
Operating ranges heating cooling .......................................................17
Admissible water flow rates.................................................................18
Internal exchanger pressure drop ......................................................18
Hydronic assembly
Unit with 1 Inverter pump ...................................................................19
Performances
Heating and cooling ............................................................................21
Installation
Safety areas and functional distances ................................................31
Setup ..................................................................................................32
Water quality .......................................................................................33
Water quality, Hydraulic connections ..................................................34
Hydraulic connections.........................................................................35
System solution...................................................................................36
System configurations
Electric connection..............................................................................40
Cascade management........................................................................42
Modular configuration units.................................................................43
Domestic hot water management .....................................................44

General information
Features and benefits
AEROTOP L is the new air cooled
heat pump, equipped with Full DC
Inverter technology and R-32 refriger-
ant, for outdoor installation. It is avail-
able from 20 kW up to 55 kW and is
the most effective and valuable solu-
tion both in terms of capital invest-
ment and running costs.
Energy Efficiency
Class A Eurovent at full load in heat-
ing and in cooling.
SCOP up to 4,30, which reaches the
A++ class according to EU Regulation
811/2013 (ErP) with low water tem-
perature (LWT 35°C).
SEER up to 4,64 which makes it ex-
tremely competitive even com-pared
to the cooling only units.
Capacity modulation from 30% to
100%.
Functionality
 Management and production of do-
mestic hot water up to 55 °C
 Climate compensation with out-
door temperature
 Double set-point adjustable
 Additional heating source manage-
ment
 SILENT mode:
 speed reduction of compressors and
fans
 three levels of silence: standard
mode, silenced, super silen-ced
Application Versatility
All the main system components are
integrated in the unit, assu-ring the
best reliability and an easy installa-
tion:
 Hydronic assembly with 1 inverter
pump
Wide operating range
Outdoor air temperature max / min
heating mode < 30 °C / > -14 °C
domestic hot water mode < 43 °C /
> 14 °C
cooling mode < 48 °C / > -10 °C
Flow water temperature max /min
heating mode < 54 °C / > 15 °C
domestic hot water mode < 54 °C /
> 15 °C
cooling mode < 20 °C / > 0 °C
Modular design
AEROTOP M has been designed for
modularity. It is possible to connect up
to 16 units in a local network, reach-
ing a maximum capacity of 960 kW.
The combinations can also take place
with different capacity units. The mod-
ular system, obtained by combining
several modules, preserves the
strengths of the single module, but
multiplies the advantages:
 Increased system efficiency
 Higher reliability
 Simplified handling and installation
 Quick and easy maintenance
 Scalability
Technology
The technical solutions adopted place
AEROTOP M on top of its category
 DC inverter technology on compres-
sors and fans
 Electronic expansion valve
 Flow switch
 Hydrophilic battery
Tax credit
Due to its high efficiency, AEROTOP
M may be eligible for heat pump sub-
sidies in Your Country

General information
Standard unit technical specifications
Compressor Range 54–61kW
Inverter controlled rotary-type hermet-
ic compressor equipped with a motor
protection device for overheating,
overcurrents and excessive tempera-
tures of the supply gas. It is installed
on anti-vibration mounts and it is
equipped with oil charge. The com-
pressor is wrapped in a sound-
absorbing hood, that reduces its
sound emissions and it thermally insu-
lates it. A crankcase heater, which
starts automatically, keeps the oil
from being diluted by the refrigerant
when the compressor stops.
Compressors are connected in tan-
dem on a single refrigerating circuit
with a dedicated system for the oil
recovery
Range 65–88 kW
Direct expansion heat exchanger
Scroll hermetic compressor with
steam injection controlled by inverter,
complete with motor over-temperature
and over-current devices and protec-
tion against excessive gas discharge
temperature. It is installed on anti-
vibration mounts and it is equipped
with oil charge. The compressor is
wrapped in a sound-absorbing hood,
that reduces its sound emissions and
it thermally insulates it.
A crankcase heater, which starts au-
tomatically, keeps the oil from being
diluted by the refrigerant when the
compressor stops.
Compressors are connected in tan-
dem on a single refrigerating circuit
with a dedicated system for the oil
recovery .
Structure
Supporting structure realized with
steel with zinc-magnesium superficial
traitment painted with polyester pow-
der RAL 9001, that ensures excellent
mechanical features and high long-
term resilience against corrosion.
Paneling
External RAL 9001 painted zinc-
magnesium sheet metal panelling that
ensures superior resistance to corro-
sion for outdoor installation and elimi-
nates the need for periodic painting.
Each panel can be easily removed to
allow full access to internal compo-
nents.
Internal exchanger
 Direct expansion heat exchanger,
brazed AISI 316 stainless steel
plates, in pack without seals using
copper as the brazing material, with
low refrigerant charge and large
exchange surface.
 The exchanger comes complete
with:
 external thermal insulation no-
condensation, thickness 17 mm, in
expanded polypropylene (EPP)
 antifreeze heater to protect the wa-
ter side exchanger, preventing the
formation of frost if the water tem-
perature falls below a set value.
 flow switch
 anti-ice probe
External exchanger
c coil exchanger made with copper
pipes placed on staggered rows me-
chanically expanded to better adhere
to the fin collar.
Fins are made from aluminum with
hydrophic treatment that allows the
correct evacuation of condensing wa-
ter and optimizes defrosting.
Fins have a special corrugated sur-
face and they are appropriately dis-
tanced to ensure the maximum heat
exchange efficiency. n.
Fan
Helical fans with 4 profiled blades
made of reinfoced plastic, directly
coupled to the DC brushless motor
with electronic control, IP 54 execu-
tion.
Fans are located in aerodynamically
shaped structures to increase efficien-
cy and minimize noise level, equipped
with accident prevention steel guards.
Refrigeration circuit
 Refrigeration circuit with: Direct ex-
pansion heat exchanger
 filter dryer
 liquid receiver
 pressure transducer (high/low)
 refrigerant temperature probe
 electronic expansion valves
 non return valve4-way reverse-cycle
valve
 high pressure safety pressure
switch
 low pressure safety pressure switch
 low pressure safety valve
 return liquid separator
 oil separator
Refrigeration circuit
 cooling system of the of the electri-
cal control panel using undercooled
liquid
Only for range 65–88 kW:
 economizer exchanger
Electrical panel
 main door lock isolator switch
 phase monitor
 auxiliary components protection fuse
 compressor protection fuse
 fan motor thermal protections
 interface terminal with graphic dis-
play
 intuitive graphical interface retro
lighted
 display of operating status
 Unit On/Off and overload reset
 manual changing of the operating
mode (hot or cold)
 management of the operating pa-
rameters
 daily, weekly programmer of temper-
ature set-point and unit on/off
 self-diagnosis system with immedi-
ate display of the fault code
 compressor overload protection and
timer
 relay for remote cumulative fault
signal
 potential-free contact for remote on-
off control
 potential-free contact for summer /
winter change
 potential-free contacts for compres-
sor status
 serial port with modbus port (RS485)
for remote communication
Test
Unit subjected to factory-tested in
specific steps and test pressure of the
piping of the refrigerant circuit (with
nitrogen and hydrogen), before ship-
ping them

General information
Refrigerant information
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 accord-
ing 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:
Physical characteristics of the R32 refrigerant
Safety class (ISO 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
AEROTOP L Refrigerant (Kg) Equivalent CO2 tons
54, 61k 15 10
65, 79, 88 21 14

General information
Built-in options
Scope delivery Description
User side hydronic group with 1 inverter
pump
Hydronic unit made of a centrifugal electric pump, adjusted by way of inverter, body
and propeller made in AISI 304 steel. The electric pump is equipped with three-
phase electric motor with IP55 protection and complete with heat formed insulating
casing. The water connection are 2” Victaulic.
Copper / aluminium condenser coil Coils with copper pipes and aluminium fins. Resist bi-metallic corrosion and allow
for application in coastal areas.
Attention!
Cooling capacity variation -2.7%
Variation in compressor power input +4.2%
Operating range reduction -2.1°C
Finned coil protection grill The grilles protect the external coil from accidental contact with objects or persons.
Ideal for installation in places where persons can pass from, such as car parks,
terraces, etc
Steel mesh strainer on the water side The device stops the exchanger from being clogged by any impurities which are in
the hydraulic circuit. The mechanical steel mesh strainer must be placed on the
water input line. It can be easily dismantled for periodical maintenance and clean-
ing
Filter fittings are Victaulic type by 2”.
Steel mesh strainer pressure drops
Q = Admissible water flow rate [l/s]
DP = Water side pressure drops [kPa ]
Anti-vibration mount support The rubber antivibration mounts are attached in special housing on the support
frame and serve to smooth the vibrations produced by the unit thus reducing the
noise transmitted to the support structure.

Technical data
Dimensions drawings
AEROTOP-L 54 - 61 kW
1. Compressor compartment
2.
3. Control keypad
4. Power input
5. Water return 2” Victaulic
6. Water flow 2” Victaulic
7. Pump
8. Functional spaces
In modular configuration the water input and output are 4” Victaulic.
54 61
Lenght mm 2337 2337
Depth mm 1130 1130
Height mm 2152 2152
Operating weight kg 580 580
Shipping weight kg 590 590

Technical data
Dimensions drawings
AEROTOP-L 65 - 88 kW
65 8879
Lenght mm 3190 31903190
Depth mm 1130 11301130
Height mm 2155 21552155
Operating weight kg 780 780780
Shipping weight kg 796 796796
1. Compressor compartment
2. Electrical panel
3. Control keypad
4. Power input
5. Water return 2” Victaulic
6. Water flow 2” Victaulic
7. Pump
8. Functional spaces
In modular configuration the water input and output are 4” Victaulic.

Technical data
Performances
AEROTOP L 054 061 065 079 088Note
Cooling performances (EN14511:2018) kW 53,3 58,9 72 77,7 855
A35 / W18 kW 62,4 72,3 85,1 89,2 1073
Electrical absorption
(EN14511:2018) kW 18,1 20,3 22,9 25,1 29,2
EER (EN14511:2018) 2,95 2,9 3,15 3,1 2,914
SEER 4,57 4,51 4,64 4,62 4,56
Heating performances (EN14511:2018) kW 53 66 79,3 84,7 912
A-7 / W35 kW 39 48 55 60 66
A2 / W35 kW 50 59 71 77 84
Electrical absorption
(EN14511:2018) kW 16,5 20,8 23,8 25,7 28
COP (EN14511:2018) 3,21 3,17 3,33 3,29 3,251
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) 65 65 66 67 67
SCOP - W35 4,04 4,03 4,08 4,07 4,066
min. Buffer dimensioning L1000 1500
Suggested piping dimensions
Cooling DN 80 100 100 125 125
Heating DN 65 65 80 80 80
Standard Water flow rate
Cooling dT 3K l/s 4,00 5,79 6,81 7,14 8,57
Heating dT 7K l/s 3,05 3,20 4,27 4,60 4,80
Standard Air flow rate m3/h 24800 24800 37200 37200 37200
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 3000
kg 580 580 780 780 780Weight
ErP Energy efficiency - W35 A++ A++ A++ -A++7
Article number 3725697 3725698 3725699 3725700 3725701

Technical data
Performances
The Product is compliant with the ErP (Energy Related Products) European Directive. It includes the Commission delegated
Regulation (EU) No 811/2013 (rated heat output ≤ 70 kW at specified reference conditions) and the Commission delegated
Regulation (EU) No 813/2013 (rated heat output ≤ 400 kW at specified reference conditions)
Contains fluorinated greenhouse gases (GWP 675)
1. COP (EN 14511:2013) Heating performance coefficient. Ratio between delivered heating capacity and power input in
compliance with EN 14511:2013.
2. Entering/leaving water temperature user side 40/45 °C, Entering external exchanger air temperature 7 °C (R.H. = 85%)
3. Entering/leaving water temperature user side 23/18 °C, Entering external exchanger air temperature 35 °C
4. EER (EN 14511:2013) cooling performance coefficient. Ratio between delivered cooling capacity and power input in com-
pliance with EN 14511:2013
5. User side entering/leaving water temperature 12/7 °C, external exchanger entering air 35°C
6. Data referred to unit operation with inverter frequency optimized for this application.
7. Data calculated according to the EN 14825:2016 Regulation

Technical data
Construction
AEROTOP L 54 61 65 79 88
Compressor
Compressor type ROTARY INVERTER SCROLL INVERTER
Refrigerant R32
N° compressor Nr 22222
Oil charge l55666
Refrigerant charge kg 15,0 15,0 21,0 21,0 21,0
N° circuits Nr 11111
User side exchanger
Type of internal exchanger BPHE1
Water content l5,7 5,7 7,8 7,8 7,8
External Section Fans
Fans type BRUSHLESS DC MOTOR
N° fans Nr 22333
Standard air-flow m3/h 24800 24800 37200 37200 37200
Installed unit power kW 0,9 0,9 0,9 0,9 0,9
Water circuit
Maximum water side pressure Mpa 11111
Minimum circuit water volume in heating l400 400 620 620 6202
Minimum circuit water volume in cooling l150 150 200 200 2003
Total internal water volume l5,9 5,9 8,0 8,0 8,0
Power supply
Standard power supply 400/3/50+N 400/3/50+N 400/3/50+N 400/3/50+N 400/3/50+N
1.
2. Entering/leaving water temperature user side 25/30 °C, external exchanger entering air 2°C (U.R. = 85%) - Minimum wa-
ter volume that does not consider the volume of water inside the unit.
3. Entering/leaving water temperature user side 15/10 °C, external exchanger entering air 25°C (U.R. = 85%) - Minimum
water volume that does not consider the volume of water inside the unit.

Technical data
Electrical data
Supply voltage 400/3/50+N
AEROTOP L 54 61 65 79 88
F.L.A. - Full load current at max admissible conditions
F.L.A. - Total A38,5 38,5 59,7 59,7 59,7
F.L.I. - Full load power input at max admissible conditions
F.L.I. - Total kW 25,6 25,6 40,1 40,1 40,1
M.I.C. - Maximum inrush current
M.I.C. - Total A46,0 46,0 60,2 60,2 60,2
Power supply 400/3/50 (+ NEUTRAL) +/- 10%. Maximum Phase Unbalance: 2%.
For non standard voltage please contact ELCO technical office
Wiring cross sections and fuse protection
AEROTOP L
Remote ON - OFF
External power supply
Power supply Switch manual fuses Wiring
(Lmax = 20 mt)
54 - 61 380-415V 3N~ 50Hz 100A 63A 25mm2 X 5
65 - 88 380-415V 3N~ 50Hz 100A 80A 25mm2 X 5
Deviating connection lengths and electrical fuses must be calculated according to the country-specific regulations.
EVU-Lock
Special tariffs with reduced electricity
prices are available from many energy
supply companies (EVU) for the oper-
ation of heat pumps. In return, the
utility company is allowed to shut
down the heat pump at certain times
and the building cannot be reheated
by the heat pump for this period. Cov-
erage is then usually provided by a
buffer storage tank. In solidly built
houses, especially in connection with
underfloor heating, blocking periods
can be bridged by the storage mass.
A buffer tank or second heat genera-
tor is then not required. If a second
heat generator (bivalent parallel oper-
ation) is available, the blocking time
can be neglected for the dimensioning
of the heat pump.
There are some country-specific
differences for blocking periods:
Tariffs in Germany are regulated ac-
cording to the Federal Tariff Ordi-
nance (Federal tariff regulation heat
pumps) on Heat Pumps. Shutdown
can occur up to 3 times per day for
two hours each. Shutdown can be
time-controlled, demand-controlled
(balancing of load peaks) or not at all.
A distinction is made between hard
and soft shutdown. In the case of hard
shutdown, the main power supply
(compressor current) is interrupted.
Alternatively, many utilities offer shut-
down via a ripple control signal. Addi-
tional electric heating inserts mounted
outside the heat pump (e.g. in the
storage tank) may continue to be op-
erated up to a maximum output of
2kW.
In practice, the following surcharge factors have proven effective, since never all
rooms are heated and the standard outside temperature is rarely reached.
Sum of blocking times per day [h] Factor for additional heating power
21,05
41,1
61,15

Technical data
Sound levels
Standard mode
Silenced mode or Super Silenced mode can be set from the user interface terminal
Sound levels refer to units with nominal test conditions.
The sound pressure level refers to a distance of 1 meter from the outer surface of the unit operating in open field.
Noise levels are determined using the tensiometric method (UNI EN ISO 9614-2)
Data referred to the following conditions in heating:
 internal exchanger water = 30/35°C
 ambient temperature 7/6 °C
Data referred to the following conditions in cooling:
 internal exchanger water = 12/7°C
 ambient temperature 35°C
AEROTOP L
Sound power level Sound pressure
level
Sound power
level
Octave band (Hz)
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
54 62 67 68 72 79 72 64 52 64 82
61 68 79 76 73 76 67 59 52 65 82
65 65 66 69 73 80 73 65 51 62 81
79 59 67 69 72 80 73 65 51 65 84
88 87 77 76 76 79 68 60 53 67 85
AEROTOP L
Sound power level Sound pressure
level
Sound power
level
Octave band (Hz)
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
54 54 57 62 67 66 64 57 46 56 74
61 73 65 70 69 65 62 55 49 56 74
65 66 57 60 68 67 65 56 43 58 76
79 61 55 59 67 66 63 55 41 58 76
88 86 67 69 70 63 58 54 47 58 76
Silenced Mode
Super Silenced Mode
AEROTOP L
Sound power level Sound pressure
level
Sound power
level
Octave band (Hz)
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
54 48 51 57 62 58 61 56 44 52 70
61 68 64 70 64 59 62 54 48 53 71
65 69 58 59 66 62 59 51 40 53 71
79 61 49 56 64 61 59 52 39 53 71
88 86 63 58 68 60 56 54 48 55 73
Sound levels refer to units with maximum test conditions. For maximum capacity supplied in silent mode, a correction factor
of 0,90 shall be used.
Sound levels refer to units with maximum test conditions. For maximum capacity supplied in super silent mode, a correction
factor of 0,85 shall be used.

Technical data
Sound levels
Performance correction factors
At maximum conditions data
AEROTOP L
Sound power level Sound
pressurelevel
Sound
power level
Octave band (Hz)
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
54 55 65 67 72 77 70 61 50 67 83
61 55 65 67 72 77 70 61 50 67 83
65 57 67 69 73 79 72 64 51 69 85
79 57 67 69 73 79 72 64 51 69 85
88 57 67 69 73 79 72 64 51 69 85
AEROTOP L 54 61 65 79 88
Cooling capacity factor Nr 0,930 0,930 0,930 0,930 0,930
Total power input factor Nr 1,000 1,000 1,000 1,000 1,000
EER factor Nr 0,930 0,930 0,930 0,930 0,930
Heating capacity factor Nr 0,950 0,950 0,950 0,950 0,950
Total power input factor Nr 0,950 0,950 0,950 0,950 0,950
COP factor Nr 1,000 1,000 1,000 1,000 1,000
Performance correction factors- Silenced Mode
Performance correction factors - Super Silenced Mode
AEROTOP L 54 61 65 79 88
Cooling capacity factor Nr 0,880 0,880 0,880 0,880 0,880
Total power input factor Nr 1,020 1,020 1,020 1,020 1,020
EER factor Nr 0,860 0,860 0,860 0,860 0,860
Heating capacity factor Nr 0,900 0,900 0,900 0,900 0,900
Total power input factor Nr 0,900 0,900 0,900 0,900 0,900
COP factor Nr 1,000 1,000 1,000 1,000 1,000
Sound levels refer to units with maximum test conditions. The sound pressure level refers to a distance of 1 meter from the
outer surface of the unit operating in open field. Noise levels are determined using the tensiometric method (UNI EN ISO
9614-2)

Technical data
Fouling and glycol use correction factors,
overload and control device
Overload and control device calibrations
The value entered refers to units supplied with a hydronic group installed on board
Refrigerant side Open Close Value
High pressure safety switch kPa 4200 3200 -
Low pressure safety switch kPa 50 130 -
Low pressure safety valve kPa - - 3000
Compressor discharge high temperature safety thermostat C° 115 75 -
Water side
Antifreeze protection C° 420 -
High pressure safety valve kPa - - 600*
Fouling correction factors
Internal exchanger
m²K/W F1 FK1
0,44x10(-4) - -
0,88x10(-4) 0,96 0,99
1,76x10(-4) 0,93 0,98
The cooling performance values provided in the tables are based on the external exchanger having clean plates (fouling fac-
tor 1). For different fouling factor values, multiply the performance by the coefficients shown in the table.
F1 = Cooling capacity correction factors
FK1 = Compressor power input correction factor
Correction factors for Glycol use
% ethylene glycol by weight
Freezing point °C 0-4-9-16 -23 -37
Correction factor for unit cooling capacity Nr 10,984 0,973 0,965 0,96 0,95
Correction factor for flow rate Nr 11,019 1,051 1,092 1,145 1,2
Correction factor for system pressure drop Nr 11,118 1,268 1,482 1,791 2,1
The correction factors shown refer to water and glycol ethylene mixes used to prevent the formation of frost on the exchang-
ers in the water circuit during inactivity in winter.

Technical data
Operating ranges heating cooling
Operating range - Heating - AEROTOP L 54 - 61kW
Outdoor air temperature Tae (°C)
Flow temperature Twu (°C)
Twu [°C] = Leaving exchanger water
temperature
Tae [°C] = External exchanger return
air temperature
1Normal operating range
2Operating range where the use of
ethylene glycol is mandatory in
relation to the temperature of the
water at the flow of the user side
exchanger.
Flow temperature Twu (°C)
Outdoor air temperature Tae (°C)
Operating range - Cooling AEROTOP L 54 - 88kW
Operating range - Heating - AEROTOP L 65 - 88kW
Outdoor air temperature Tae (°C)
Flow temperature Twu (°C)
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.

Technical data
Internal exchanger pressure drop and
admissible water flow rates
Standard unit without hydronic assembly on the user side, but equipped with components as listed on the key of the enclosed
plumbing circuit diagram.
It is possible to control an external pump by an on/off or 0-10V signal.
Water fittings are Victaulic type by 2”.
Internal exchanger pressure drop curves
Internal exchancer pressure drop
To the internal exchanger pressure drops must be added the pressure drops of the steel mesh mechanical filter that must be
placed on the water input line. It is a device compulsory for the correct unit operation, and it is provided by ELCO as accesso-
ry
Admissible water flow rates
Min. (Qmin) and max. (Qmax) water flow-rates admissibles for the correct unit operation
AEROTOP L 54 61 65 79 88
Minimum flow l/s 1,9 1,9 2,9 2,9 2,9
Maximum flow-rate l/s 6,4 6,4 6,4 6,4 6,4
The pressure drops on the water
side are calculated by considering
an average water temperature at
7°C.
Q = Water flow rate[l/s]
DP = Pressure drops [kPa]
The water flow rate must be calcu-
lated with the following formula
Q [l/s] = kWf / (4,186 x DT)
kWf = Cooling capacity in kW
DT = Temperature difference
between entering / leaving water

Hydronic assembly
Unit with 1 Inverter pump
This configuration provides for one inverter-controlled electric centrifugal pump with body and impeller in AISI 304 steel and
components listed in the key of the included water diagram. The electric pump is equipped with three-phase electric motor
with IP55-protection and complete with thermoformed insulated casing.
During the installation phase it is possible to choose the most suitable head curve for system requirements by setting the
inverter frequency. The pump will always work at fixed flow.
Water fittings are Victaulic type by 2
Pump available pressure AEROTOP L 54 – 61 kW
Caution: in order to obtain useful head
values, the head represented in these
diagrams must be lowered by:
 Condenser pressure drops
 IFWX - Steel mesh strainer on the water
side” accessory (where present).
Pump absorption AEROTOP L 54 – 61 KW
Heat Pump Integral Components
1. Heat pump exchanger
2. Antifreeze heater
3. Water temperature probe
4.
5. System load safety pressure switch
6. Pressure gauge
7.
8. Safety valve
9.
10.Vent
Available pressure [kPa]
Water flow-rate [l/s]
Power input [kW]
Water flow-rate [l/s]

Hydronic assembly
Unit with 1 Inverter pump
Pump available pressure AEROTOP L 65 – 88 kW
Pump available power AEROTOP L 65 – 88 kW
Electrical data
AEROTOP L 54 61 65 79 88
F.L.A. (Full load current) A1,90 1,90 2,50 2,50 2,50
F.L.I. (Full load power input) kW 0,75 0,75 1,1 1,1 1,1
Caution: in order to obtain useful head
values, the head represented in these
diagrams must be lowered by:
 Condenser pressure drops
 IFWX - Steel mesh strainer on the
water side” accessory (where present).
Available pressure [kPa]
Water flow-rate [l/s]
Available power [kW]
Water flow-rate [l/s]