Immergas AUDAX.DK4 Product manual

AUDAX.DK4
Instructions and warnings
Installer
Maintenance technician
IE
Outdoor unit
*1.046617ENG*
*1.046617ENG*

Instructions on how to correctly dispose of the product.
At the end of its life, this appliance must not be disposed of as mixed municipal waste.
It is mandatory to separate this type of waste so that the materials making up the appliance can be recycled and reused. Contact
authorised operators for disposal of this type of appliance. Incorrect management of waste and its disposal has potential negative
eects on the environment and on human health. e symbol on the appliance represents the prohibition of disposing of the product as mixed
municipal waste.
3 Installation ..............................................................................8
3.1 Opening the outdoor unit .......................................................8
3.2 Assembling the outdoor unit ..................................................8
3.2.1 installation structure ................................................................8
3.2.2 installing the outdoor unit.......................................................9
3.2.3 Condensate drain......................................................................9
3.2.4 Fall prevention of the outdoor unit........................................9
3.3 Connecting the water pipe ....................................................10
3.3.1 water pipe connections ..........................................................10
3.3.2 safety valve drain ....................................................................10
3.3.3 System lling...........................................................................11
3.4 Wiring connection..................................................................11
4 Antifreeze protection ...........................................................13
4.1 Hydraulic circuit protection from freezing - Glycol and
antifreeze protection valves...................................................13
4.2 Anti-freeze resistance kit (optional) ....................................14
5 Operating diagrams..............................................................15
5.1 Functional layout....................................................................15
5.2 Wiring diagrams.....................................................................16
1 Casing-related information ...................................................4
1.1 Outdoor unit .............................................................................4
1.1.1 Outdoor unit handling.............................................................4
1.1.2 Removal of accessories from the outdoor unit.....................4
1.2 Main Dimensions. ....................................................................5
2 Preparation..............................................................................6
2.1 Preparing the installation site .................................................6
2.1.1 Requirements of the outdoor unit installation site ..............6
2.1.2 Additional requirements of the outdoor unit
installation site in cold climates..............................................6
2.2 Preparing the hydraulic pipes .................................................7
2.2.1 Permitted pipe length and height dierence.........................7
2.2.2 Water volume and ow rate - minimum contents. ..............7
2.3 Preparing the wiring ................................................................7
2.3.1 electrical connections for external and internal actuators..7
e manufacturer declines all liability due to printing or transcription errors, reserving the right to make any modications to its technical and
commercial documents without forewarning.
e company IMMERGAS S.p.A., with registered oce in via Cisa Ligure 95 42041 Brescello (RE), declares that the design, manufacturing and
aer-sales assistance processes comply with the requirements of standard UNI EN ISO 9001:2015.
For further details on the product CE marking, request a copy of the Declaration of Conformity from the manufacturer, specifying the appliance
model and the language of the country.
INDEX
Warning this manual contains the exclusive instructions for use for professionally qualied
installers, in compliance with the laws in force.
e manufacturer will not be held liable in the case of damage to people, animals or property
due to the failure to observe the instructions contained in the manuals supplied.

4
1× 2× 1×
fd e
1× 1× 1×
a b c
Casing-related information
1CASINGRELATED INFORMATION
1.1 OUTDOOR UNIT
1.1.1 OUTDOOR UNIT HANDLING
ATTENTION
To prevent damage or injuries, DO NOT touch the
air inlet nozzle or the aluminium ns of the unit.
NOTE
To prevent damaging the mount feet, NEVER tilt the
unit sideways in any way:
1.1.2 REMOVAL OF ACCESSORIES FROM THE OUTDOOR
UNIT
1) Li the outdoor unit. See “1.1.1, Outdoor unit handling”.
2) Remove the accessories at the bottom of the unit.
KEY:
a = Part of the connection (with O-ring) of the antifreeze protection
valve inside the outdoor unit
b = Antifreeze protection valve (inside the outdoor unit)
c = Vacuum switch (outside the outdoor unit)
d = Installation manual of the outdoor unit
e = Cable clamp
f = Drain tting
NOTE
e shut-o valves, the control panel and the vibra-
tion-dampening feet are located inside the accessory
unit, inside the indoor unit packaging.
Slowly transport the unit as shown:

5
Casing-related information
KEY:
RHT (G1") = Return to heat pump
MHT (G1") = Flow from heat pump
1.2 MAIN DIMENSIONS.

6
>250
(mm)
b
>350
>250
a
b
>250
>350
a
b
>250
>350
a
b
>250
a
b
a
>250
>300
c
a
b
c
d
Preparation
2PREPARATION
2.1 PREPARING THE INSTALLATION SITE
WARNING
e equipment must be stored in an environment
with no ignition sources in continuous operation
(e.g.: open ames, gas equipment in operation or
electric heaters in operation).
2.1.1 REQUIREMENTS OF THE OUTDOOR UNIT
INSTALLATION SITE
Keep the following space guidelines in mind:
KEY:
a = Air outlet
b = Air inlet
NOTE
e height of the wall on the outlet side of the out-
door unit MUST BE ≤1200mm.
e outdoor unit is only designed for outdoor installation and for the
following room temperatures:
Room central heating operation –15~25°C
Production of Domestic Hot
Water –15~35°C
Special requirements for R32
e outdoor unit contains the internal coolant circuit (R32), but NO
local coolant pipe or coolant charging is required.
e total coolant charge in the system is ≤1.842kg, therefore, the system
is NOT subject to any requirement in relation to the installation site.
However, keep the following requirements and precautions in mind:
KEY:
a = Snow cover or shelter
b = Pedestal
c = Prevailing wind direction
d = Air outlet
However, provide a space of at least 300 mm under the unit. In ad-
dition, make sure that the unit is positioned at least 100 mm above
the maximum height that fallen snow is expected to reach. For more
information, consult “3.2 Assembling the outdoor unit”.
In areas subject to heavy snowfalls, it is very important to choose
an installation site where snow CANNOT reach the unit. If blowing
lateral snowfalls are possible, make sure that the heat exchanger coil
CANNOT be covered by snow. If necessary, install a snow cover or
shelter and a pedestal.
WARNING
- DO NOT puncture or burn.
- DO NOT use tools to accelerate the defrosting
process or to clean the equipment, other than those
recommended by the manufacturer.
- Keep in mind that the R32 coolant is odourless.
WARNING
e appliance must be stored in such a way as to avoid
mechanical damage, in a well ventilated environment
and with no ignition sources in continuous operation
(for example: open ames, gas appliance in operation
or electric heater in operation).
WARNING
Make sure that the installation, maintenance and re-
pair are carried out in compliance with the Immergas
instructions and local regulations in force and that
they are only performed by authorised personnel.
2.1.2 ADDITIONAL REQUIREMENTS OF THE OUTDOOR
UNIT INSTALLATION SITE IN COLD CLIMATES
Protect the outdoor unit from snow falls and make sure that the outdoor
unit is NEVER buried under snow.

7
e
d
a
H1
b
D1
D2
D3
D1
c
M
Preparation
2.2 PREPARING THE HYDRAULIC PIPES
2.2.1 PERMITTED PIPE LENGTH AND HEIGHT
DIFFERENCE
KEY:
a = Outdoor unit
b = Indoor unit
c = 3-way valve
d = Room central heating circuit
e = External storage tank unit (if applicable)
Which? Distance
H1
Maximum height difference
between outdoor unit and in-
door unit
It depends on the expansion
vessel present in the indoor unit
—
Maximum total length of the wa-
ter pipe (internal section+external
section)
To be calculated according to
the head available to the system
(see Victrix Hybrid and Victrix
Hybrid Plus instruction manuals)
D1
Maximum length of the external
section of the water pipe (to
prevent freezing the water pipe)
30m
(but limited to D2 when the
external storage tank unit is
installed)
D2
Maximum distances be-
tween the outdoor unit and
the external storage tank unit
(if applicable)
10 m
D3 Maximum distance between out-
door unit and indoor unit
To be calculated according to
the head available to the system
(see Victrix Hybrid and Victrix
Hybrid Plus instruction manuals)
2.2.2 WATER VOLUME AND FLOW RATE  MINIMUM
CONTENTS.
Minimum water volume
Check that the total water volume in the system, EXCLUDING the
water volume inside the outdoor unit, is at least 20 litres.
Minimum ow rate
Ensure minimum ow rate, so that the outdoor unit does not go into
high pressure error (1021). For the ow rate guidelines, see the tables
in “2.2.1 Permitted pipe length and height dierence”.
2.3 PREPARING THE WIRING
2.3.1 ELECTRICAL CONNECTIONS FOR EXTERNAL AND
INTERNAL ACTUATORS
NOTE
e cables used for the electrical connections inside
the connection compartment must be able to with-
stand a maximum temperature of 90°C.
Outdoor unit connections:
Item Description Wires Maximum oper-
ating current
Power supply
1Outdoor unit power
supply 2+GND (a)
Control panel
2Control panel 2 (b)
Optional equipment
3Anti-freeze resist-
ance kit 2 (c)
(a) See the information plate on the outdoor unit.
(b) Cable section from 0.75 mm² to 1.25 mm² ; maximum length:
200m.
(c) See kit instructions
NOTE
Other technical specications of the various connec-
tions can be found inside the outdoor unit.
Indoor unit connections.
NOTE
Other technical specications of the various connec-
tions can be found inside the instruction manual of
the hybrid heat pump.

8
2× 2×
2
4× 3 2×
1
574
311
4× M8/M10
(mm)
(mm)
<150
a
>300
311
574
>100
574
311
Installation
3INSTALLATION
3.1 OPENING THE OUTDOOR UNIT
DANGER: RISK OF ELECTRIC SHOCK
DANGER: RISK OF BURNS
1) Open the upper panel.
2) Open the front plate.
3) If necessary, remove the rear plate. For example, this is necessary in
the following cases:
- When the antifreeze protection valve is installed inside the outdoor
unit.
- When the anti-freeze resistance kit is installed.
3.2 ASSEMBLING THE OUTDOOR UNIT
3.2.1 INSTALLATION STRUCTURE
is section shows dierent installation structures. For all, use 4 series
of M8 or M10 anchor bolts, nuts and washers. However, provide a
space of at least 300 mm from the ground. In addition, make sure that
the unit is positioned at least 100 mm above the maximum height that
fallen snow is expected to reach.
INFORMATION
e maximum height of the top protruding part of
the bolts is 15 mm.
Anchor points
Option 1: on assembly feet "exible with strut"
KEY:
a = Maximum height reached by the fallen snow
Option 2: on plastic assembly feet

9
574
311
<100
>300
(mm)
(mm)
>300
a
4×
4× M8/M10
b
c
d
a
Installation
Option 3: on a pedestal (insert the vibration-dampening feet present
in the indoor unit packaging)
Option 4: on wall brackets (optional)
KEY:
a = Vibration-dampening rubber (supplied inside the kit)
3.2.2 INSTALLING THE OUTDOOR UNIT
3.2.3 CONDENSATE DRAIN
Make sure that the condensate water can be properly evacuated.
NOTE
If the unit is installed in cold climates:
- Take adequate countermeasures so that the evacu-
ated condensate CANNOT freeze.
- DO NOT USE the drain tting and the drain hose
in the outdoor unit, since the water drain may
freeze, decreasing the central heating capacity.
NOTE
Provide a space of at least 300 mm under the unit.
In addition, make sure that the unit is positioned at
least 100 mm above the height that fallen snow is
expected to reach.
Use the drain plug and the drain hose for drainage, except in cold
climates.
KEY:
a = Drain hole
b = Lower frame
c = Drain tting (supplied as standard)
d = Flexible hose (obtain locally)
3.2.4 FALL PREVENTION OF THE OUTDOOR UNIT
Take the following measures should the unit be installed in places where
strong wind could tilt it:
1) Prepare 2 cables as indicated in the following illustration (obtain
locally).
2) Arrange the 2 cables above the outdoor unit.
3) Insert a rubber sheet between the cables and the outdoor unit to
prevent the cables scratching the paint (obtain locally).
4) Fix the ends of the cable and tighten them.

10
235
a b
a b
c2 c3c1
Installation
3.3 CONNECTING THE WATER PIPE
3.3.1 WATER PIPE CONNECTIONS
NOTE
DO NOT use excessive force to connect the pipes.
Deforming the pipes can cause defects in the unit.
Make sure that the tightening torque DOES NOT
exceed 30N•m.
NOTE
Shut-off valve with integrated vent. It is recom-
mended to connect the shut-o valves present inside
the accessory unit in the indoor unit packaging, to
facilitate assistance and maintenance. When shut-
o valves are not installed, it is necessary to install
valves with integrated air vent on the ow from heat
pump (MHT) and on the return to heat pump (RHT).
KEY:
a = RHT (G1") Return to heat pump
b = MHT (G1") Flow from heat pump
c1 = Flat gaskets
c2 = Shut-o valve
c3 = Shut-o valve with integrated connection
of the vacuum switch (if applicable).
1) Connect the shut-o valves by inserting at gaskets and position
them with the vent facing up.
2) Connect the site pipes on the shut-o valves.
3.3.2 SAFETY VALVE DRAIN
NOTE
In the event of overpressure, the system will release
part of the liquid through the safety valve. e safety
valve of the outdoor unit is designed to open at 3 bar.
e safety valve drain must always be duly conveyed
to a draining funnel. Consequently, in the event of
valve intervention, the discharged liquid will end up
in the sewer system.
If uid containing glycol was added to the system
circuit, make sure it is recovered and disposed of in
accordance with standard EN 1717.
However, check that the exible hose of the safety
valve is ALWAYS free to discharge the pressure.
KEY:
a = Pressure discharge valve
b = Flexible hose (discharge)(obtain locally)
1) Open the upper plate, the front plate and the rear plate. See
“3.1.Opening the outdoor unit”.
2) Make a cross cut in the rubber gasket on the rear plate.
3) Route the exible hose through the gasket.
4) Close the rear plate.
5) Pull the exible hose gently so that it is tilted downwards. is pre-
vents the water from stagnating and/or freezing inside the exible
hose.
6) Close the front plate and the upper plate.