auer HRC 70 PILOT-PREMIUM User manual

Made in
France
Manual ref. : 1898302
Edition n° : 22.22
Installation and user manual
HRC70
High temperature Heat Pumps
from 17 to 25 kW
HRC70 17 / 3 m
Ref. 151430
HRC70 17 / 3 t
Ref. 151435
HRC70 20 / 3 t
Ref. 151445
HRC70 25 / 3 t
Ref. 151450
HRC70 17 / 3 m
HRC70 17 / 3 t
HRC70 20 / 3 t
HRC70 25 / 3 t
The information contained in this document is non-contractual. Auer reserves the right to modify the technical specifications or characteristics of any of their appliances without prior notice.

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
2
CONTENTS
1  PLEASE READ IMMEDIATELY ....................... 4
1.1 - Important information.......................................................................4
1.2 - Safety advice and instructions........................................................4
1.3 - Symbols used........................................................................................5
1.4 - Delivery terms and conditions........................................................5
1.5 - Storage and transport........................................................................5
1.5.1 - General information ................................................................................................ 5
1.5.2 - Transporting with a forklift truck ........................................................................ 5
1.5.3 - Transporting manually............................................................................................5
2  INTRODUCTION............................................. 7
2.1 - Standard congurations....................................................................7
2.2 - Operation of the Heat Pump ...........................................................7
2.3 - Accessories (included) .......................................................................7
2.4 - Accessories available to order.........................................................7
3  INSTALLATION................................................ 8
3.1 - Installing the HRC70.......................................................................................................................................8
3.1.1 - Installation site .......................................................................................................... 8
3.1.1.1 - Heat Pump installation site ..................................................................9
3.1.1.2 - Condensates drainage .........................................................................10
3.1.1.3 - Heater cable for external condensates drainage .......................... 10
3.1.1.4 - Protection screen for the nned heat exchanger.......................10
3.2 - Hydraulic installation........................................................................11
3.2.1 - Hydraulic connections on the installation ....................................................11
3.2.2 - Hydraulic connections : Heat Pump circuit...................................................12
3.2.3 - Heat Pump and Pilot pressure-relief valves............................................................12
3.2.4 - Desludging................................................................................................................12
3.2.5 - Heat Pump water inlet lter (supplied) ..........................................................13
3.2.6 - Backow prevention device ...............................................................................13
3.2.7 - Purging the heating circuit .................................................................................13
3.2.8 - Insulating the piping.............................................................................................13
3.2.9 - Expansion vessel.....................................................................................................13
3.2.10 - Frost protection and water treatment..........................................................................13
3.3 - Electrical control connections.......................................................13
3.3.1 - Connecting to the Heat Pump control ...........................................................13
3.3.1.1 - 2-core sheathed cable..........................................................................13
3.4 - Connecting to the power supply.................................................14
3.4.1 - Recommendations for connecting the system to the power supply..14
3.4.2 - Connecting the HRC70 Heat Pump to the power supply ..........................14
3.4.2.1 - HRC70 Heat Pump : 230V single-phase connection ..................... 16
3.4.2.2 - HRC70 Heat Pump : 400V three-phase connection....................... 16
3.4.3 - Electrical protection for the compressors................................................................16
4  SETUP........................................................... 17
5  MAINTENANCE AND TROUBLESHOOTING17
5.1 - General information .........................................................................17
5.2 - Maintenance on the hydraulic circuit.........................................17
5.2.1 - Water circuit..............................................................................................................17
5.2.2 - Maintenance of the heating circuit..................................................................18
5.3 - Maintenance of the Heat Pump ...................................................18
5.4 - Maintenance of the electrical components......................................18
5.5 - Errors which are not signalled by error message or alert....19
5.6 - Compressor start-up faults.............................................................20
5.7 - Alerts and errors which are signalled by the appliance.......20

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 3
5.8 - Sensor data curve charts.................................................................21
5.8.1 - Waterinlet and outlet HRC70 Heat Pump and HRC70 Pilot de-icing sensor
- Air intake sensor - Sensors installed on compressors 1 and 2
- Swimming pool sensor - DHW sensor........................................................................................21
5.8.2 - Exterior sensor.........................................................................................................21
5.9 - Modication.........................................................................................21
5.10 - Decommissioning...........................................................................21
5.10.1 - Interim Product Retirement .............................................................................21
5.10.2 - Final decommissioning of the product........................................................21
5.11 - Recycling, decommissioning and disposal............................21
5.11.1 - Disposal of refrigerant uid..............................................................................21
6  SPARE PARTS ................................................ 22
6.1 - HRC70 Heat Pump................................................................................22
6.2 - Electrical boxes...................................................................................23
7  WARRANTY ................................................... 24
7.1 - Limitations of warranty....................................................................24
7.1.1 - General information ..............................................................................................24
7.1.2 - Exclusion from warranty ......................................................................................24
7.1.2.1 - Heating circuit water ............................................................................24
7.1.2.2 - Handling....................................................................................................24
7.1.2.3 - Installation site........................................................................................24
7.1.2.4 - Electrical connections ..........................................................................24
7.1.2.5 - Hydraulic connections .........................................................................24
7.1.2.6 - Accessories...............................................................................................24
7.1.2.7 - Maintenance............................................................................................24
APPENDICES...................................................... 25
A1 - Dimensions...........................................................................................25
A2 - Technical specications....................................................................26
A2.1 - General specications ...........................................................................................26
A2.2 - Performances*..........................................................................................................27
A3 - EU declaration .....................................................................................28
A4 - Frost protection ..................................................................................28
A5 - Sizing the expansion vessel............................................................28
A6 - Treatment of the water in the heating circuit..........................29
A6.1 - Preparing the hydraulic circuit (rinsing) .........................................................29
A6.2 - Filling water..............................................................................................................29
A6.3 - Treatment of the heating circuit........................................................................29
A6.4 - Protection from freezing ......................................................................................29
A7 - Product performances tables ........................................................31
A7.1 - HRC70 Heat Pump 17kW single-phase .............................................................31
A7.2 - HRC70 Heat Pump 17kW three-phase..............................................................32
A7.3 - HRC70 Heat Pump 20kW three-phase...............................................................33
A7.4 - HRC70 Heat Pump 25kW three-phase...............................................................34
HRC70 Heat Pump - 17 kW single-phase -
Internal wiring diagram...................................................................36
HRC70 Heat Pump- 17 kW and 20 kW three-phase -
Internal wiring diagram...................................................................38
HRC70 Heat Pump- 25 kW three-phase -
Internal wiring diagram...................................................................40
A8 - Electricity provider information form.........................................42
NOTES / MAINTENANCE ................................... 43

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
4
The high temperature Heat Pump absorbs the calories present in
exterior air, and transforms them into useful energy which is then
transferred to the heating water for your home. AUER cannot be held
responsible for any other usage of the appliance.
The safety advice and instructions present in this document must
be strictly respected.
Before making any connections to the installation, make sure the
appliances are compatible with the installation.
Before switching on the appliance, check that the network voltage
to be applied to the appliance is the same as the one on the rating
plate of the appliance.
Before undertaking any manintenance work, handling, or in the
case of the appliance not functioning or malfunctioning, always
disconnect the appliance from the power supply and seek advice
from a technician or specialist.
AUER cannot be held liable for damages caused by not following
the instructions provided, nor any problems or errors caused from
improper handling, improper installation, or misuse.
The installation and operating instructions are subject to change
without prior notice.
1.1 - Important information
1 - PLEASE READ IMMEDIATELY
These installation and operating instructions form part of the appliances which they refer to.
In order for the warranty to be valid, they must be read before using the appliance.
This manual must be safeguarded and passed on to successive users for future reference.
It will be considered as evidence in case of litigation.
- It is the responsibility of the installer and
of the client to ensure that the appliance
is compatible with the power grid before
connecting the HRC70 Heat Pump (see the
electricity provider information form in the
Appendix)
- The power grid impedence value must be
less than the Heat Pump impedance Zmax
value (see § «Connecting the HRC70 Heat
Pump to the power supply»).
- If the electrical installation standards are
not respected there could be irreversible
damages to the HRC70 Heat Pump which are
not covered by the manufacturer’s warranty.
ELECTRICAL INSTALLATION
RECOMMENDATIONS
- Clean and ush the hydraulic heating circuit
before connecting the appliances (Heat Pump
and Pilot).
- The appliance only works when lled with
water. Never switch the appliance on if it is not
properly lled with water and purged of air.
- The lter valve ensures the protection of
the Heat Pump. An annual inspection of the
condition of the lter must be carried out.
- It is recommended to carry out periodic
inspections for sludge and limescale and to
clean when necessary. The appliance must
always be switched o before any cleaning is
undertaken.
- Always switch o the appliance before working
on any electrical components.
Caution:The fan may continue turning through
inertia even when the appliance is switched o.
Wait for the fan to stop before working on the
appliance.
- Never get water on the control components or
electrical parts. Always switch o the appliance
before cleaning.
HYDRAULIC INSTALLATION
RECOMMENDATIONS
1.2 - Safety advice and instructions
• The Heat Pump must only be installed outside.
• This appliance should not be used by: children under 8 years old; anyone with reduced physical, sensory or mental capabilities; or by anyone
who has insucient experience or knowledge of the appliance; unless they are being supervised by someone who is responsible for their
safety and in possession of the operating instructions of the appliance.
• Installation of the Heat Pump indoors is strictly prohibited.
• The Heat Pump operates using an air temperature range of -20°C to 40°C. When the temperature falls below -20°C, the installation no longer
heats using the Heat Pump, but using the back-up.

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 5
• It is FORBIDDEN :
- to operate the Heat Pump using air intake containing solvents
or explosive materials.
- to use air intake containing grease, dust, or aerosol particles.
- to connect vented exhaust hoods to the appliance.
• Use of the appliances are FORBIDDEN if the installation is not
lled with water.
• All work must be carried out by a qualied professional with the
appliance switched o.
• This appliance must be installed in accordance
with national electrical installation regulations.
Check that the appliance is equipped with a properly
sized and properly connected grounding cable.
This CE approved unit is in compliance with the following standards:
- Low voltage 2006/95/CEE (standard EN 60.335.1).
- Electromagnetic compatibility 2004/108/CEE (standard EN
55014.1 / EN 55014.2).
• Any work on the refrigerant circuit must be carried out by a qualied
professional with a category 1 certicate of aptitude.The release of
refrigerant uid into the atmosphere is prohibited, the refrigerant
uid must be recovered before any work is undertaken on the
refrigerant circuit.
The HRC70 Heat Pump uses R290 refrigerant fluid. Given the
ammable nature of the uid, any work on the refrigerant circuit
must be done with appropriate materials and by conforming
to all regulations in eect. In case of handling of uid (recovery,
evacuation or relling), the appliance must be switched o. Do not
smoke or light any ame (e.g. lighter, blowtorch) when handling
refrigerant uid. if work must be carried out on the refrigerant
circuit using a ame (blowtorch) the refrigerant circuit must rst be
evacuated and replaced with a nitrogen atmosphere.
Identies important warnings and recommendations.
1.3 - Symbols used
Contains controlled substances, do not dispose of in
the garbage. In case of disposal, please respect the
regulations for the recovery of electrical and electronic
equipment.
Consult the installation manual before all work on the
product: handling, installation, use and maintenance.
Type and refrigerant charge.
PS High: Max high service pressure
PS Low: Max low service pressure
Heating capacity :
nom: nominal
max: maximal
Max current protection (A)
Caution : contains a ammable refrigerant uid.
Please make sure to respect the installation and
handling precautions.
1.4 - Delivery terms and conditions
In general, the material is transported at the recipient’s own risk.
It is important to verify that all of the elements have been received
and that no damage has been sustained during transport upon
receipt of the appliance and before beginning the installation
procedures.
Heat Pump
Accessories
Pilot
1.5 - Storage and transport
Admissible storage and transport temperatures of the appliance are
between -20°C and +60°C.
1.5.1 - General information
The appliances must be stored and transported packaged and
on their wooden pallets, in a vertical position, and completely
empty of water.
1.5.2 - Transporting with a forklift truck
When transporting with a forklift truck, the Heat Pump must be on
its wooden pallet.
When moving the Heat Pump do not lower or raise the unit suddenly
as the Heat Pump can easily lose it equilibrium. The Heat Pump should
be suitably secured to prevent it from tipping.
1.5.3 - Transporting manually
The Heat Pump can be transported manually. For the 17kW to 25kW
Heat Pump, use two(2) Ø26mm bars (not supplied) or straps inserted
through the holes provided for this purpose.
Do not damage
the heat exchanger
ns during handling or
transport.
Heat Pumps
should never
be laid at. Do not
incline more than 30°
Bar
Ø 26mm

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
6

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 7
2.1 - Standard congurations
2 - INTRODUCTION
Interior
installation
only
Exterior
installation
only
The ensemble is composed of an exterior unit (Monoblock high
temperature Heat Pump to be installed outdoors exclusively)
and of an interior unit (Pilot, to be installed indoors exclusively)
connected together through a hydraulic connection and a
communication bus.
The air to water Heat Pump, draws calories from the exterior air
and transfers them to the heating water circuit with high energy
eciency.
The Pilot ensures the regulation and hydraulic distribution of the
installation.
If the heating capacity required is higher than heating capacity
delivered by the Heat Pump, the Pilot can provide an extra power
boost from the boiler, or from the electrical back-up based on needs.
Note : The Heat Pump is exclusively designed for heating purposes.
It cannot be used for cooling.
2.2 - Operation of the Heat Pump
The Heat Pump is a closed and pressurised system in which the
refrigerant serves as the medium for transferring energy.
The evaporator (e) is a cooling exchanger which draws calories from
the air. The humidity in the air condenses on contact with the cold
surface, and forms condensation (evacuation in (i)).
The capacitor (f), a plated heat exchanger which is hydraulically
linked to the heating installation (h), via the Pilot, enables to heat
the water in the heating circuit, and in turn enables the heating of
the building.
Mid-season
onl y compressor(b)
is used.
The fan (g) runs
at speed 1.
In cold weather
only compressor (c)
is used.
The fan (g) runs
at speed 2.
In extreme cold
both compressors
(b) and (c)
are used at the same time.
The fan (g) runs at speed 3.
b: Compressor 1
c: Compressor 2
d: Expansion valve
e: Evaporator
f: Capacitor
g: Fan
h: Inlet / outlet point for the radiator
circuit
i: Condensates drainage
2.3 - Accessories (included)
The components described below are delivered with the Heat Pump
but they are not mounted :
2-core sheathed cable linking the
Heat Pump and the Pilot (lg 10m)
Pre-installed on the Heat Pump, only needs to be connected to
the Pilot.
1’’ 1/4 lter valve
(delivered with the hydraulic connection kit)
Hydraulic connection kit lg 1.5m
2.4 - Accessories available to order
2-core sheathed cable connecting the
Heat Pump and the Pilot (lg 20m)
20m length for connection instead of the 10m length delivered
as standard.
2-core sheathed cable connecting the
Heat Pump and the Pilot (lg 50m)
50m length for connection instead of the 10m length delivered
as standard.
External heater cable
Used to prevent frost from forming on the external condensates
drainage pipe.

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
8
3.1 - Installing the HRC70
3 - INSTALLATION
3.1.1 - Installation site
The Heat Pump must always be transported in a vertical position,
including during installation. It should be transported with the help
of a forklift.
Do not use the hydraulic connections to move the appliance, take
hold of it using the four bottom corners of the appliance.
Installation must be carried out by a qualied installer, taking all
necessary precautions to avoid any risk of accidents or of material
damage.
The Heat Pump is designed to be installed outdoors exclusively,
while respecting a minimum of free space around the appliance in
an area free from excessive levels of dust. It should never be placed
in an enclosed space.
The Heat Pump is designed to operate in rainy weather conditions,
although it can be installed under a well ventilated shelter (with
an opening large enough to allow sucient air ow for intake and
exhaust).

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 9
3.1.1.1 - Heat Pump installation site
Minimum distances to respect for proper installation of the Heat
Pump: (mm) :
50Cm
Mini
1m
Mini
50Cm
Mini
0
C
m
i
n
i
1m
Mini
Always make sure the heat exchanger ns are
protected when handling the appliance.
The Heat Pump must handled with caution and without being
subjected to impacts, especially when placing on the ground.
The Heat Pump must be installed on a hard
and stable base, which is suciently raised
from ground level to avoid risks of damage in case
of ooding or snow.
•The Heat Pump must only be installed
outdoors.
• Any installation in an enclosed space without
proper ventilation is prohibited.
• Do not restrict air intake or ventilation exhaust.
No object should impede the ow of air over the
heat exchanger. The Heat Pump should be placed
out of the way of prevailing winds.
• Do not install the Heat Pump near sources of
excessive heat, combustible materials, or near
ventilation points of adjacent buildings.
• Do not install the Heat Pump near a kitchen
or workshop exhaust ducts; this can result
in a mixture of oil and air settling onto the
heat exchanger ns which could hamper its
performance.
• Do not install the Heat Pump in an area with
ammable gaz, acidic substances, or alkalines
which could cause irreversible damage to the
copper-aluminium heat exchanger.
• Avoid installing the Heat Pump in a location
subject to noise reverberation such as near
windows or near the corners of buildings.
• As the condensates draining trough slopes
downward, the Heat Pump must be installed on a
level base.
• The Heat Pump must be easily accessible so as to
facilitate access for inspections and maintenance.

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
10
3.1.1.2 - Condensates drainage
When the appliance is operating in frost protection mode, the
condensed water must be drained o. In order for the condensates
to drain properly, the drainage trough and hole must be clean and
free of all debris (leaves, grass, etc...).
If the condensates drainage pipe is connected to the rainwater run-
o system, it is advised to use a siphon.
Do not use any tools to remove ice (risk of damage to the heat
exchanger).
The Heat Pump is delivered with a flexible and transparent
condensates drainage pipe (Ø20/25mm) which does not drain
outdoors.
Before activation of the appliance, it is mandatory to connect this
exible pipe to one of the two holes provided for this purpose:
- Remove the back panel of the appliance.
- Position the exible hose in its chosen place after having
drilled a hole in the grommet.
a - Draining from underneath the Heat Pump
This solution is recommended to minimise the risk of ice at the
condensates drainage point.
b - Draining from the back of the Heat Pump
Is an acceptable solution but in this case an external heater
cable (Ref. 751004) needs to be connected. Please refer to §
«Heater cable for external condensates drainage» as well as the
instructions provided with the heater cable itself.
View from above
showing position of opening in concrete slab (case a)
3.1.1.3 - Heater cable for external
condensates drainage
The Heat Pump allows for the addition of an external heater cable
to prevent freezing of the condensates drainage circuit. The heater
cable (optional Ref.751004) is connected to the electrical box on the
terminals marked HG on the electronics board.
It must be installed in accordance with the instructions supplied
with the cable, in or around the condensates drainage pipe, outside
the Heat Pump.
3.1.1.4 - Protection screen for the nned heat
exchanger
The plastic screen which protects the nned heat exchanger during
transport may be removed once the Heat Pump is in position in its
denitive installation site.
To remove the plastic screen, simply cut it away from its attachment
points.
There is always a risk of damage to the ns from external factors (for
example, being close to a well-frequented walkway or thoroughfare),
therefore, it is preferable to keep the plastic screen in place.
Caution: The fins are fragile and sharp. Make sure that the air
passages are kept clean and clear of any blockages (take care not
to bend the ns while doing so).
Never clean the nned heat exchanger
with a high-pressure hose or any other
pressurised cleaning equipment. This could
damage the ns.
Side view
Back of the HRC
Back of the HRC
70
70
heat pump
heat pump
FrontoftheHRC
FrontoftheHRC
70
70
heatpump
heatpump

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 11
In order to ensure that uids can circulate properly, it is advisable to check that the sizing of piping in the circuit is appropriate between the
Heat Pump and the Pilot. All piping should be thermally insulated,
especially the connecting pipes from the Pilot
to the Heat Pump.
The Heat Pump is equipped with a hydraulic
pressure relief valve set at 2.5 bars. A service
pressure below this value should be maintained.
3.2.1 - Hydraulic connections on the installation
3.2 - Hydraulic installation
a) • Install the connection (Rep.1) onto the «outlet» of the Heat Pump, it must be in a horizontal position.
• Fix the reduction and manual purger (Rep.2) on the connection (Rep.1).
• Install the isolation valve (Rep.10).
b) • At the inlet of the heat pump, mount the reduction (Rep.7) on the heat exchanger pricking.
• Install the lter (Rep.8). It must be placed horizontally.
• Install the isolation valve (Rep.10), then the areola 1’’1/4 (Rep.5).
c) • On each hose (Rep.6), prepare only one end :
- place the clamp (Rep.4) on the end of the hose (Rep.6) without tightening.
- assemble the uted tip (Rep.3) with the nut and place it in the hose (Rep.6).
- on the second hose, proceed the same way with the splined elbow (Rep.9).
- allow the nut move freely.
- tighten the clamp (Rep.4).
d) • Fix each hose assembled as decribed above onto the «inlet» and «outlet» of the Heat Pump using the joint (Rep.11). The hose with the uted
tip is to be connected to the outlet of the heat pump (red arrow on the drawing). The hose with the uted elbow is to be connected to the
inlet of the heat pump (blue arrow on the drawing).
e) • Pass the hoses (Rep.6) [non-assembled ends] through the wall of the home.
• Prepare the ends of the hoses as described in step c) (2 uted tip).
• Connect pre-assembled hoses (Rep.6) to your piping.
f) • Insulate the hoses and pipes.
1. Exit Heat Pump connection
2. Manual purger
3. Fluted purger
4. Clamp 40x60 W4
5. Areola 1’’1/4
6. Hose ND 30x38
7. Reducer 1’’1/4M 1’’F
8. Filter 1’’1/4
9. Fluted elbow
10. Isolation valve
11. Fiber joint Ø 38x25x2

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
12
3.2.2 - Hydraulic connections :
Heat Pump circuit 3.2.3 - Heat Pump and Pilot pressure-relief valves
3.2.4 - Desludging
A sufficient flow rate should be ensured so that the range of
temperature between the outlet and inlet of the Heat Pump does
not exceed 8°C when the Heat Pump is operating at full power (take
a temperature measure when the HRC70 Heat Pump is in heating
mode and the system is fully functioning) :
The hydraulic connection section between the Heat Pump and the
Pilot must be sucient.
Using the tables below, determine the minimum inner diameter of
the connection of piping needed depending on the distance which
separates the Heat Pump and the Pilot.
Make sure that all sections of piping are equipped with functional
and accessible air valves.
The Heat Pump’s hydraulic connection to the Pilot can be done using
steel, copper, or reticulated polyethylene pipes with a minimum
equivalent diameter of 1’’.
The hydraulic kit must be installed using exible piping on the water
inlet and outlet points of the Heat Pump in order to prevent any
vibrations from being transmitted to the heating system.
The Heat Pump and the Pilot are both equipped with pressure-
relief valves.
The pressure-relief valve on the Heat Pump sets the maximum
acceptable pressure in the installation (2.5 bars when hot). The
maximum service pressure on the Heat Pump must, consequently
be lower than 2.5 bars.
Example : If the Heat Pump is positioned 5m below the Pilot, the
pressure reading on the Pilot would be 0.5 bars less than
the real pressure of the water in the Heat Pump. In this case,
the maximum service pressure for the Pilot would be 2 bars.
Therefore it would be advisable to ll the heating circuit at
an intermediary pressure (between 1 and 1.5 bars).
In case of operating with a back-up boiler, these pressure-relief
valves MUST be installed in addition to the ones which the boiler
is already equipped with.
The connections and the evacuation conduits for the pressure-relief
valves must be made from materials which are resistant to high
temperatures and corrosion.
CP : Pilot pressure gauge
S : Pressure-relief valve for the Pilot, set at 3 bars
Sch : Pressure-relief valve for existing boiler
SPAC : Pressure-relief valve for Heat Pump set at 2.5 bars
The HRC70 Pilot has an integrated desludging function which collects
oxides, limescale, and other particles which may become detached
from the inner walls of the heating circuit. The lower part of the
system is equipped with a sludge valve which should be briey
activated at least once per year (see § «Maintenance and repairs»).
For underoor heating installations, we would advise you to install a
settling tank, which will complement the actions taken by the Pilot.
Heat pump model 17kW 20kW 25kW
Minimum nominal ow rate (L/h) 2000 2400 3000
Maximum pressure (bar) 2.5 2.5 2.5
If distance between HP and pilot <10m
(equivalent of 20m linear of loss of load) 26/28 30/32 34/36
If distance between HP and pilot <15m
(equivalent of 30m linear of loss of load) 30/32 34/36 38/40
If distance between HP and pilot <25
(equivalent of 50m linear of loss of load) 32/34 36/38 42/44
If distance between HP and pilot <50
(equivalent of 100m linear of loss of load) 38/40 42/44 48/50
Existing
Existing
boiler
boiler

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 13
3.2.5 - Heat Pump water inlet lter (supplied)
A lter 1’’1/4 must be installed on the water inlet piping on the Heat
Pump:
• Respect the direction of ow on the lter (arrow on the
valve)
Clean the lter several times as soon as
the Heat Pump circulator pump has been
activated (make sure to switch o the Heat Pump
circulator pump before cleaning).
• Clean the lter at least once per year.
3.2.6 - Backow prevention device
French law (articles 16.7 and 16.8 of the ‘‘Règlement Sanitaire
Départemental’’) stipulates that a type CB backow prevention
device must be installed. This device must be at dierent, non-
regulated pressure zones, in accordance with the NF P 43-011
standard. This is also an obligatory requirement in other countries,
which makes it important to verify the current laws and standards in
eect in the country of installation and ensure that your installation
is in compliance with them. The backow prevention device is
designed to prevent incoming heating water from entering the
drinking water circuit. It must be connected to the mains drainage
system.
3.2.7 - Purging the heating circuit
All necessary measures must be taken to ensure that the installation
can be continuously degassed. Automatic air purging valves should
be placed at each high point of the installation, and manual air
purging valves should be installed on each radiator.
3.2.8 - Insulating the piping
Insulants must conform to the DTU 67.1 standard, or the current
regulations in eect in the country of installation.
All visible piping and accessories (circulator pump, expansion vessel,
valves, etc...) must be either insulated or placed in insulated sleeves.
Remember to insulate the distribution manifolds and the inlet and
outlet ow pipes to the underoor heating circuit.
Remember to insulate the piping which connects the Heat Pump
to the Pilot.
3.2.9 - Expansion vessel
An expansion vessel needs to be installed onto the heating circuit.
See Appendix A5 for information on proper sizing of the expansion
vessel.
3.2.10 - Frost protection and water treatment
See Appendices A4 and A6.
3.3 - Electrical control connections
3.3.1 - Connecting to the Heat Pump control
3.3.1.1 - 2-core sheathed cable
The Heat Pump is pre-equipped with a non-polarised, 2-core
sheathed cable (communication bus). This 10m cable is supplied
with, and already connected to, the Heat Pump. It must be connected
to the Pilot.
If the connection needed is longer than 10m replace this cable with
a 20m cable (Ref.753102)(Ref.751005) or a 50m cable (Ref.754103)
available as an option.
• On the Pilot, cut the bus link to the right length : LOOPS ARE
FORBIDDEN.
Connection detail on the IMPERATIVE
grounded heat pump of the link cable
shield.

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
14
The rules and regulations in the country of
installation MUST be respected (standard
C15-100).
• The electrical lines for general power supply to the
circuits must be made in compliance with your
country’s current rules and regulations (standard
C15-100).
• Standard C15-100 determines the cable section to
be used based on acceptable currents.
• Standard C15-100 determines the cable section to
be used based on the following elements :
- Nature of the conductor :
. type of insulation, number of strands, etc...
- Installation mode :
. inuence of conductor and cable groups
. ambient temperature
. tightly or non-tightly installed
. length of cables, etc...
3.4 - Connecting to the power supply
Ensure that the power supply is sucient to supply both the Heat
Pump and the electrical back-up if necessary, taking into account
any other domestic usage of electricity.
Connection to the power supply for each appliance must be done
by a qualied professional with the mains power switched o.
• During transport, the electrical connections
may be subject to accidental loosening.
• To eliminate any risk of abnormal heating, it is
necessary to ensure the placement of the faston
type electrical connections are secure and tighten
the screw connections.
See§ «Spare parts - electrical boxes»
Each appliance is delivered from the factory completely pre-wired.
However, it is necessary to connect the following elements to the
relevant terminals:
• The electrical supply of the power circuit for each appliance
separately : the Heat Pump and the Pilot.
•The dierent temperature sensors, thermostats, and load shedding
device on the Pilot.
• The 2-core sheathed connecting cable (10m length supplied)
between the Heat Pump and the Pilot.
Under no circumstances will the manufacturer be held liable for
any problems which may arise due to improper installation and/or
choice of power supply cable.
Terminal strips
The terminal strips are spring-loaded «Cage Clamps».
For handling, use the following :
- for2,5mm² control terminals or 4mm² -
6mm² power terminals (tetra), use a 3,5 x
0,5mm at-head screwdriver.
- for 10mm² mains power terminals
(single-phase), use a 5,5 x 0,8mm at-
head screwdriver.
1 : Insert the screwdriver into the ap just above
or below the identication number.
2 : Insert the wire into the «CAGE CLAMP» when
the ap is open.
3 : Remove the screwdriver.
Note : The wires must be stripped to the following lengths:
- for the 2,5mm² control terminals: between 10 and 12mm.
- for the mains power terminals: between 18 and 20mm.
- for the intermediary power terminals: between 11 and 13mm.
3.4.1 - Recommendations for connecting the
system to the power supply
Check :
• The power consumption
• Number and thickness of the power supply
cables
• Fuse or circuit breaker ratings
The power supply must come from an electrical protection and
sectioning device which complies with all current rules and
regulation in eect in the country of use.
This CE-approved unit complies with all the essential requirements
of the following directives:
- Low voltage n°2006/95/CE
- Electromagnetic compatibility n° 2004/108/CE
Ensure that the installation is equipped with a properly sized and
connected grounding cable.
Ensure that the voltage and frequency of the general power supply
ts requirements.
The acceptable variation in voltage is:
230 V -10% to +6%50Hz for single-phase+ Ground models
400 V -10% to +6%50Hz for three-phase+ Neutral + Ground models
3.4.2 - Connecting the HRC70 Heat Pump to the
power supply
- It is the responsibility of the installer and of the
clienttoensurethattheapplianceiscompatible
with the power grid before connecting the
HRC70 Heat Pump (see the electricity provider
information form in the Appendix)
- The power grid impedence value must be less
than the Heat Pump impedance Zmax value (see
§ «Connecting the HRC70 Heat Pump to the
power supply»).
- If the electrical installation standards are not
respected there could be irreversible damages
to the HRC70 Heat Pump which are not covered
by the manufacturer’s warranty.
ELECTRICAL INSTALLATION
RECOMMENDATIONS

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 15
The HRC70 Heat Pump is CE-marked. It is compliant with French
standard NF C15-100 as well as European standards EN 61000-3-3
and EN 61000-3-11, among others.
It is equipped with a progressive start-up, which limits the current
at start-up to 45Ain single-phase, and 60Ain three-phase.
The power supply cable should be sized carefully according to the
following factors:
- Maximum current required
- Distance between the HRC70 Heat Pump and the power
supply
- overall protection
- The neutral operating system
Make sure to strip the cable before placing it into the
terminals, and make sure that the copper is in good
condition.
A method of disconnection must always be installed in compliance
with the installation rules.
If the power supply cable is damaged, it must be replaced by a
qualied professional to avoid any risk of danger.
To access the terminals: remove the panel on the bottom left-hand
side (2 screws) and open the electrical box (8 screws).
The electrical power supply cable should rst be inserted through
an exterior compression gland and then through a cable grommet
on the electrical box.
HRC70 heat pump model HRC70 17 / 3 single-phase HRC70 17 / 3 three-phase HRC70 20 / 3 three-phase HRC70 25 / 3 three-phase
Power supply voltage 230V single-phase 400V three-phase 400V three-phase 400V three-phase
Maximum power consumption 7.5 kVA 7.5 kVA 9.5 kVA 11.5 kVA
Maximum current requirements 32 A 13 A 15 A 18 A
Maximum start-up currents 45 A 48 A 48 A 60 A
Presence of a progressive starter YES NO NO YES
Phi tangent on heat pump start-up 1.53 2.46 2.46 2.37
Heat pump (Zmax) impedence(ohm) 0.181 - - -
Phase impedence (Zmax) (ohm) - 0.248 0.248 0.175
Neutral impedence (Zmax) (ohm) - 0.166 0.166 0.117
Heat pump regulation mode Fixed speed Fixed speed Fixed speed Fixed speed
Number of power stages 3323
Circuit breaker dimensions(1) 40 A single phase 16 A three phase 16 A three phase 20 A three phase
Power supply cable cross-section by phase (2) 10 mm² 4 mm² 4 mm² 6 mm²
Number of conductors (2) 2x 10 mm² + T* 4x 4 mm² +T* 4x 4 mm² +T* 4x 6 mm² +T*
Back-up heating elements (kVA) See the «Connecting the Premium or XS pilot to the power supply» table
(1) D-curve two-pole or three-pole general circuit breaker.
(2) The gures given here are indicative. They must be checked, and modied if necessary according to the conditions of installation and on the current rules and regulations in eect.
If the length of the cable exceeds 15m, or if the network could be subject to drops in voltage over 10V, use a thicker cable.
(*) The cross-section of the ground cable must be equal to the thickest section of the power supply cable.

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
16
3.4.2.1 - HRC70 Heat Pump :
230V single-phase connection
L = phase
N = neutral
PE = ground
See § «recommendations for
connecting the system to the
power supply»
3.4.2.2 - HRC70 Heat Pump :
400V three-phase connection
L1,L2,L3 = phase
N = neutral
PE = ground
See § «recommendations for
connecting the system to the
power supply»
• Three-phase monitor relay for the HRC70 Heat Pump
17kW, 20kW and 25kW
A phase monitor relay is installed to prevent phase failure, which
could damage the compressors. If the phases are reversed, it will
stop the power supply to the Heat Pump.
3.4.3 - Electrical protection for the compressors
The HRC70 Heat Pump is equipped with a progressive start-up
device to limit the intensity of the current when the motor starts
up, in compliance with the NF C-15-100 standard: 45A per phase in
single-phase and 60A per phase in three-phase.
The electrical protection devices for
the compressors constantly monitor
the current and voltage. In case of over-
voltage, under-voltage, or an abnormally
high current, the compressor is stopped.
If the phase order is reversed, or there is a phase missing, the relay
cuts the power supply to the circuit board. A «BUS Err» error message
will appear. This is indicated on the phase monitor relay by the
orange light at the top being o and the green light at the bottom
being on. To correct the error, reverse the two phases on the mains
power terminal.
When the Pilot is switched on, a «BUS Err» error message will be
displayed. Reverse the two phases on the three-phase power cable
of the Heat Pump. Switch the power back on and check the voltage
on each phase.
In case of INCORRECT WIRING :
Caution: never work with live voltage!
CORRECT WIRING
orange and
green LED
lights on
INCORRECT WIRING
only green
LED light on
• Progressive start-up of the HRC70 Heat Pump when
using a single-phase system
The progressive start-up device
constantly monitors the compressor
bymeasuring thecurrentandvoltage.
In case of over-voltage, under-
voltage, or an abnormally high
current, the compressor is stopped.
How it works :
• The progressive start-up device controls the start-up phase until
the motor reaches its stable operating speed.
• If the motor cannot start, it is because the power supply has been
cut o by the progressive start-up device.
In order to protect the compressor, the motor will not be able to
start-up again until 5 minutes after it has been stopped.
Start-up errors :
• If the compressor fails to start-up, 2 LEDs (orange and green)
will be ashing to indicate the error (see § «Compressor start-up
errors»).
• Progressive start-up of the HRC70 Heat Pump when
using a 25kW three-phase system
The progressive start-up device also serves to
control the phases (phase order or missing phase,
which could damage the compressor).
If the order of phases is inversed or if there is a
missing phase, the relay cuts the power supply
supply to the compressor.This error is indicated by
by the LED light ashing every second.
The progressive start-up device controls the power
supply voltage. If the voltage is under 195V, the
compressor is stopped or does not start-up. This
error is indicated by the LED light ashing rapidly
(10 ashes per second).
In case of a compressor error (over-current, short circuit, or error on
the start-up device itself) the error is indicated by an intermittent
ashing of the LED (light on for 5 seconds, and then o for 5
seconds).

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 17
4 - SET-UP
The installation must never be switched on
WITHOUT WATER in the heating circuit.
It is OBLIGATORY to refer to the technical
manual provided with the HRC70 for set-up.
• All work carried out on the hydraulic circuits and the electrical
installations must be carried out in compliance with regulations
in eect in the country of installation, by a qualied professional.
• Fill the installation with water and treat the water.
• Purge the heating circuits (open the air valves situated at the
highest points of the installation until all trapped air has been
released).
• Check that all circuits are properly sealed.
• Ckeck that the power supply voltage is correct at the mains switch.
• Ensure the correct tightness of the hydraulic connections, and
check that there are no leaks.
• Check that all the valves are open, that the heating circuit is lled
with water, and that nothing is blocking the ow of water in the
heat exchanger and the hydraulic circuit.
• Check that the sludge valve is properly installed and that nothing
is blocking its screen lter.
• Once all of these checks have been completed, switch the appliance
on.
• Congure the installation.
If necessary, this configuration can be modified through the
«Installer» menu.
5.2.1 - Water circuit
5 - MAINTENANCE AND
TROUBLESHOOTING
•In order to ensure the best performance
results from your HRC70 Heat Pump it
should be subject to regular maintenance.
•An annual maintenance check is recommended
to be carried out by a qualied professional on
the hydraulic heating circuit.
•All work carried out on the refrigerant circuit
must be done by a qualied professional with a
category 1 certicate of aptitude.
•Always switch the appliance o before opening
it.
5.1 - General information
5.2 - Maintenance on the hydraulic circuit
After the appliance has been operating for a few days, it is advised to
check that the water circuit is properly sealed, and that condensates
are draining properly.
Note : In case of maintenance work or decommissioning of an
appliance, please respect all environmental protection
instructions concerning recovery, recycling, and disposal
of consumables and components.
Inspection of the water circuit consists of removing sludge, checking
the lters, and stopping up any leaks that may have appeared. Clean
or replace clogged or dirty lters.
From time to time check that the condensates are draining properly:
- Remove the back panel
- Check the drainage hole for blockages
- Clean the condensates recovery trough as deposits from air intake
may accumulate there
- Clean the exible drainage hose:
Case a : drainage from underneath
Case b : drainage from the back
Check that the pressure-relief valve is properly sealed. It should not
leak if the water pressure is under 2.5 bars.
Safety valve

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
18
5.2.2 - Maintenance of the heating circuit
• Release any trapped air in the HRC70 Pilot+
• Check that the entire circuit is watertight, including the pressure-
relief valves.
• Check the water pressure. It must not be lower than the pressure
of the expansion vessel, and should never be more than 2.5 bars
when hot. If the water pressure is too low, check the watertightness
of the circuit before adding more water.
• Check the composition and general state of the water in the
heating circuit.
• Check the hydraulic circuit, including the cleaning of the lter,
inspecting the water quality (PH level, anti-freeze, etc...).
The HRC70 Heat Pump contains R290 refrigerant fluid. It is not
subject to regulations concerning greenhouse gasses, and does
not necessitate mandatory annual maintenance by a qualified
professional.
However, it is still recommended to carry out periodic (at least once
per year) cleaning of the evaporator ns if it is obstructed by dust or
leaves : this should be done using a vacuum cleaner or by spraying
with water.
Never clean the nned heat exchanger
with high-pressure cleaning equipment
as it could damage the ns.
In case of repair work on the HRC70 Heat Pump, the refrigerant
circuit, or the electrical box, it is important to follow the following
instructions:
Any work on the refrigerant circuit must be undertaken by a qualied
professional with a category 1 certicate of aptitude. 1. It is forbidden
to release gas from the refrigerant circuit into the atmosphere, and
it is obligatory to recover the refrigerant before undertaking any
work on the circuit.
The HRC70 Heat Pump uses R290 refrigerant fluid. Given the
ammable nature of this uid, any work on the refrigerant circuit
must be carried out using suitable equipment which complies with
the current rules and regulations in eect.
When handling the uid (recovery, draining, or relling), the appliance
must be disconnected from the power supply. Do not smoke. Do not
generate any ame (lighter, blowtorch) while handing the uid. If
work is necessary on the refrigerant circuit using a ame (blowtorch),
the refrigerant circuit must be emptied and replaced with nitrogen.
5.3 - Maintenance of the Heat Pump
• Always disconnect the appliance from
the power supply before accessing the
electrical terminals.
• Do not get water on any of the electrical
components.
5.4 - Maintenance of the electrical
components
• Check on both the HRC70 Heat Pump and the HRC70 Pilot that the
electrical supply cables are properly connected to the terminals.
• Check the electrical connections for oxidization or overheated
sections.
• Check the tightness of the cables on the compressor starters.
• Clean any dust from the electrical box and check the connections.
• Check that the ground cable is properly connected.

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW -V3 19
5.5 - Errors which are not signalled by error message or alert
Errors not displayed on the
screen
Possible causes Solutions
request
place it in winter mode and then auto.
connected to the Pilot and the power supply.
configured.
Pump (Check that there is voltage and the values:
compressor start-up is prevented if voltage is too
high or too low.
insufficient.
the fan, and of other electrical components (e.g.
circulator pump).
allow the motor to start-up: install a D-curve circuit
breaker.
component.
requirements
engage properly.
PAR.217 and 218
use of the back-up. It must be pre-configured.
operate.
sensor.
thermal safety device
outside of the authorised operating range.
The Heat Pump will not start
The Heat Pump will start, but
does not provide enough
heat

- MANUAL HRC70 HEAT PUMPS 17  20  25 KW - V3
20
5.6 - Compressor start-up faults
Led VERTE Led ROUGE Causes possibles Actions à mener
On - • Normal operation -
Flashing - • Insufficient voltage • Check the power supply voltage on the Heat Pump : it
must be over 200V (minimum)
-Flashing
2 flashes
• Abnormal drop in voltage at start-up
• Insufficient power grid voltage
• Check the compliance of the power supply from the
general meter to the Heat Pump
• Contact your electricity provided to ensure the proper
sizing og the power grid connections
-Clignotante
3 flashes
• Over-voltage at start-up • Contact an AUER-approved technical centre
-Clignotante
4 flashes
• Internal starter defect • Replace the starter
-Clignotante
5 flashes
• Start-up process incomplete • Check the power supply to the Heat Pump before and
during start-up. It must not be lower than 200V.
Vo
y
ant alarme Causes possibles Actions à mener
-Flashing
2 flashes
• Phases are inversed • Inverse the 2 phases on the power supply of the starter
-Flashing
3 flashes
• Power supply voltage is outside authorised range
• Check the voltage on the three-phased network
• Check the compliance of the power supply from the
general meter to the Heat Pump
• Contact your electricity provider to ensure the proper
sizing of the power grid connections
Flashing
4 flashes
• Non-compliant power supply frequency • Contact an AUER-approved technical centre
• Contact your electricity provider
Flashing
5 flashes
• Compressor blocked • Contact an AUER-approved technical centre
Flashing
6 flashes
• Start-up process incomplete
• Check the power supply to the Heat Pump before and
during start-up
It must not be lower than 350V.
Flashing
7 flashes
• Starter overheating • Contact an AUER-approved technical centre
-Flashing
8 flashes
• Over-voltage at start-up • Contact an AUER-approved technical centre
-Flashing
9 flashes
• Imbalance of phases
• Check the voltage onthe three-phased network
• Check the compliance of the power supply from the
general meter to the Heat Pump
• Contact your electricity provider
Single-phase starter for the HRC70 17kW single-phase Heat Pump
Three-phase starter for the HRC70 17kW, 20kW and 25kW three-phase Heat Pump
-
Note : The swimming pool sensor error is only signalled when the ohmic value is too low. The absence of a swimming pool sensor does not
generate a fault as it can mean either that there is no swimming pool, or that the swimming pool function has been deactivated.
5.7 - Alerts and errors which are signalled by the appliance
Errors are signalled by the back-lighting ashing and by a sound-signal.
Press the dial to stop the sound signal. The alarm will stop, but the error will continue to be displayed.
If it is an automatic reset fault, the signal will disappear once the problem has been resolved.
If it is a manual reset fault, rectify the problem and then press on the dial to make the signal disappear. Manual reset faults are indicated with
the following symbol: « ».