Argo AQUA UNIT AUAH User manual

EG
I
AQUA UNIT
Indoor unit - Inverter split air to water heat pump
Unità interna - Pompa di calore split Inverter aria / acqua
Unité intérieure - Pompe à chaleur split Inverter air / eau
37.4255.173.00 11/2017
INSTALLATION
INSTRUCTIONS
MANUALE
D’INSTALLAZIONE
NOTICE
D’INSTALLATION
AUAH
AUBH
AUCH
AUDH
F

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CONTENTS
1 - Generalities ...........................................4
2 - Presentation ..........................................5
3 - Installation............................................7
4 - Connections ..........................................9
5 - System wiring diagrams ................................12
6 - System layout ........................................21
7 - Starting .............................................29
8 - Maintenance instructions ...............................35
9 - Electrical diagram .....................................36
10 - Auto-diagnosis table...................................37
DECLARATION OF CONFORMITY
This product is marked as it satisfies Directives:
– LVD no. 2014/35/EU (Standard: EN60335-2-40:2003 (incl. Corr.:2006) + A11:2004 + A12:2005 + A13:2012 +
A1:2006 + A2:2009 with EN 60335-1:2012 (incl. Corr.:2014) + A11:2014).
– EMC no. 2014/30/EU (Standard: EN 55014-1:2006 + A1:2009 + A2:2011; EN 55014-2:1997 + A1:2001 +
A2:2008; EN 61000-3-2:2014; EN 61000-3-3:2013).
– RoHS2 n.2011/65/EU + 2015/863/EU amending ANNEX II.
This declaration will become void in case of misuse and/or non-observance though partial of manufacturer’s
installation and/or operating instructions.
REGULATION (EU) No. 517/2014 - F-GAS
The unit contains R410A, a fluorinated greenhouse gas
with a global warming potential (GWP) of 2087.50.
Do not release R410A into the atmosphere.
Power Supply:
220 - 240 V ~ 50 Hz
IMPORTANT!
Please read before installation
Installation of these products must be carried out by qualified personnel in accordance with European regulations
303/2008 and 517/2014.
This system meets strict safety and operating standards.
For the installer or service person, it is important to install or service the system so that it operates safely and efficiently.
To begin the warranty, the product must be started by a service center Argoclima S.p.A.
Recommendations
•Thepersonnelresponsibleforreceivingtheunitmustconductavisualinspectioninordertoidentifyalldamage
to which the unit may have been subjected during transport: refrigerating circuit, electrical cabinet, chassis and
cabinet.
•Duringinstallation,troubleshootingandmaintenanceoperations,neverusethepipesasastep:underthestress,
the pipes may break and the refrigerant may cause serious burns.
For safe installation and trouble-free operation, you must:
•Carefullyreadthisinstructionbookletbeforebeginning.
•Followeachinstallationorrepairstepexactlyasshown.
•Observealllocal,stateandnationalelectrical(andsafety)codes.
•Paycloseattentiontoallwarningandcautionnoticesgiveninthismanual.
•Supplytheunitwithadedicatedelectricalline.
•Makeinstalltheunitbyqualifiedpersonnel,inpossessionoflicenseF-GAS.
•Beforeinstallation,checkthatthevoltageoftheelectricsupplyinyourhomeorofficeisthesameasthevoltage
shown on the nameplate.
This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death.
This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.
WARNING
CAUTION

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If necessary, get help
These instructions are all you need for most installation sites and maintenance conditions.
If you require help for a special problem, contact our sale/service outlet or your certified dealer for additional
instructions.
In case of improper installation
The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure
to follow the instructions in this document.
SPECIAL PRECAUTIONS
•Duringinstallation,connectbeforethehydraulicandrefrigerantsystemandthenthewiringone;proceedinthe
reverse order when removing the unit.
ELECTRICALSHOCKCANCAUSESEVEREPERSONALINJURYORDEATH.
ONLYQUALIFIED,EXPERIENCEDELECTRICIANSSHOULDATTEMPTTOWIRETHISSYSTEM.
•Donotsupplypowertotheunituntilallwiringandtubingarecompletedorreconnectedandchecked,toensure
the grounding.
•Highlydangerouselectricalvoltagesareusedinthissystem.Carefullyrefertothewiringdiagramandthese
instructions when wiring.
Improper connections and inadequate grounding can cause accidental injury and death.
•Ground the unit following local electrical codes.
•TheYellow/Greenwirecannotbeusedforanyconnectiondifferentfromthegroundconnection.
•Connectallwiringtightly.Loosewiringmaycauseoverheatingatconnectionpointsandapossiblefirehazard.
•Donotallowwiringtotouchtherefrigeranttubing.
•Donotusemulticorecablewhenwiringthepowersupplyandcontrollines.Useseparatecablesforeachtypeof
line.
When transporting
Becarefulwhenpickingupandmovingtheunit.Getapartnertohelp,andbendyourkneeswhenliftingtoreduce
strain on your back. Sharp edges or thin aluminium fins on the unit can cut your fingers.
When installing
... In a room
Properly insulate any tubing run inside a room to prevent “sweating”, which can cause dripping and water damage
to walls and floors.
... In a wall or floor
Make sure they are strong enough to hold the unit weight. It may be necessary to build a strong wooden or metal
frame to provide added support.
... In moist or uneven locations
Use a raised concrete base to provide a solid level foundation for the unit.
This prevents damage and abnormal vibrations.
... In area with strong winds
Securely anchor the unit down with bolts and a metal frame. Provide a suitable air baffle.
... In a snowy area
Install the unit on a raised platform that is higher than drifting snow. Provide snow vents.
When connecting refrigerant tubing of Emix / Emix-Tank
•Usetheflaremethodforconnectingtubing.
•Applyrefrigerantlubricanttothematchingsurfacesoftheflareanduniontubesbeforeconnectingthem;screw
by hand and then tighten the nut with a torque wrench for a leak-free connection.
•Checkcarefullyforleaksbeforestarting.
•Insulatethetubeswithfoamedpolyethylene(min.thickness8mm).
When connecting hydraulic tubing
•Keepalltubingrunsasshortaspossible.
•Insulatethetubing.
•Checkcarefullyforleaksbeforestarting.
When servicing
•TurnthepowerOFFatthemainpowerboardbeforeopeningtheunittocheckorrepairelectricalpartsandwiring.
•Keepyourfingersandclothingawayfromanymovingparts.
•Cleanupthesiteafterthework,rememberingtocheckthatnometalscrapsorbitsofwiringhavebeenleftinside
the unit being serviced.
•Ventilatetheroomduringtheinstallationortestingtherefrigerationsystem;makesurethat,aftertheinstallation,
nogasleaksarepresent,becausethiscouldproducetoxicgasanddangerousifincontactwithflamesorheat-
sources.
When wiring
WARNING

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OPERATING CONDITIONS
1 - GENERALITIES
Water system pressure
Minimum: 1,5 bar
 Maximum:2,0bar
Water temperature
 Themaximumallowablewaterinlettemperatureoftheheatpumpis75°C
Water volume of the system (to be compulsorily checked)
Minimum: AUAH: 40 litres (*)
AUBH: 40 litres (*)
AUCH: 80 litres (*)
AUDH: 80 litres (*)
 Maximum:dimensiontheexpansionvesselaccordingtothemaximumvolumeofwater,themaximum
water temperature and the plant static height.
(*) If the water volume of the system (plant and product) is below the minimum, a buffer tank must be installed.
For the minimum water volume, consider the volume continuously connected to
the heat pump (don’t consider the volumes which could be isolated by automatic valves).
Operating limits Maximum temperature of water outlet
Outdoor ambient temperature
 Heating:-20°C/+35°C
 Cooling:+10°C/+47°C 58
50
-20 5
Wateroutlettemperature(°C)
Outdoorairtemperature(°C)

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2 - PRESENTATION
ACCESSORIES SUPPLIED WITH THE UNIT
OUTSIDETEMPERATURESENSOR
2.1 - DESCRIPTION OF THE PARTS
 1-Platetypeheatexchanger.
2 - Electric heater: 2 kW
3 - Air vent valve.
4 - Water pressure transducer.
5 - Automatic reset safety thermostat.
6 - Manual reset safety thermostat.
7 - Circulator pump.
 8-Expansionvessel.
9 - Refrigerant pressure transducer.
10 - Safety valve.
11 - Water ow sensor (owmeter).
12 - Water inlet connection.
13 - Water outlet connection.
14 - Connection for drainage of the water system.
15 - Safety valve drain connection.
16 - Flare gas connector.
17 - Flare liquid connector.
18 - Electrical cable passage.
19 - Front panel.
20 - Control panel.
21-Electricalbox.
22-PCB.
23 - Terminal blocks
Materials:
- Copper piping.
 -Stainlesssteelwaterheatexchanger.
- Painted sheet metal cabinet.
8
12
13
15
16
17
18
19
20
349 10
5
61
2
7
11
14
18
21
22
23
FRONT VIEWS
REAR VIEW

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2.2 - DIMENSIONS AND WEIGHT
AUAH AUBH AUCH AUDH
1Water inlet connection 3/4” M 3/4” M 3/4” M 3/4” M
2Water outlet connection 3/4” M 3/4” M 3/4” M 3/4” M
3Safety valve connection and drainage ø 18mm ø 18mm ø 18mm ø 18mm
4Gas refrigerant connection 1/2” 1/2” 1/2” 5/8”
5Liquid refrigerant connection 1/4” 1/4” 1/4” 3/8”
6Holes for electric cables - - - -
Model Weight (kg)
AUAH 33.5
AUBH 34
AUCH 35
AUDH 36
488
620 383
420
28741 40 93
495
63 161 35 102 69 75 53 62
100
110
14427641
12
4
5
3
6
HOLEØ8FOR
WALL FIXING
REAR VIEW
FRONT VIEW SIDE VIEW

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•DeoxidizedannealedcoppertubeforrefrigeranttubingconnectingEmix;ithastobeinsulatedwithfoamed
polyethylene (min. thickness 8mm).
• Anti-freeze oil for flare connections (about 30g.)
• Electricwire:useinsulatedcopperwiresofsizeandlengthasshownatparagraph“SYSTEMWIRING DIAGRAMS” .
• Tubes for water.
2.3 - ADDITIONAL MATERIAL REQUIRED FOR INSTALLATION (NOT SUPPLIED)
1.Standard screwdriver
2.Phillips head screwdriver
3.Knifeorwirestripper
4.Tape measure
5.Level
6.Sabre saw or key hole saw
7.Hacksaw
8. Core bits ø 5
19.Hammer
10.Drill
11.Tube cutter
12.Tube flaring tool
13.Torque wrench
14.Adjustable wrench
15.Reamer (for
reburring)
16.Hex.key
Tools required for installation (not supplied)
3 - INSTALLAZIONE
3.1 - INSTALLATION LOCATION
The unit must be installed in a closed location.
AVOID
•Proximitytoheatsources,exhaustfans.
•Proximitytocombustiblematerials.
•Direct sunlight.
•Locationswheretheunitcouldbesplashedwith
water or affected by dampness or humidity (i.e. in
laundries).
•Unsteadylocationsthatwillcausenoiseorpossible
waterleakage.
•To make holes in areas where electrical wiring or
conduits are located.
IMPORTANT NOTES
•Selectasufficientlystronglocation/walltosupport
the weight of the unit.
•Leave a minimum operation and maintenance area
around the unit.(See figure).
60 cm 60 cm
20 cm

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INSTALLATION ON EMIX TANK V2
•PlacetheunitonEmixTankV2,aligningthefrontandsidepanels.
•Maximumheightwith200l:1948mm.
•Maximumheightwith300l:2363mm.
3.2 - HOW TO INSTALL THE UNIT
IINSTALLATION TO THE WALL OR ON THE FLOOR
•Removethefrontpanelfromtheunit,pullingtowardsyou(fig. 1).
NOTE:
The panel is connected with two wires to the electrical junction
box.Becarefulnottopullthewiresand,incase,disconnectthem.
•Make4holesinthewall,usingthesuppliedtemplate(seefig. 2).
Use pins and screws (not supplied) that are appropriate to the
weight of the unit and the type of wall.
•Hookandfixtheunit.
•Replacethefrontpanel,reconnectingthewiresthatyouhave
eventually disconnected.
Fig. 1
4 x ø 8
495 mm
420 mm
461 mm
Fig. 2
ø 8
ø 14
ø 8
ø 14
ø 8
ø 8
495
420
REAR VIEW
FRONT VIEW

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4 - CONNECTIONS
AUAH AUBH AUCH AUDH
Connection to the refrigerant
circuit of outdoor unit *Circuit A Circuit A Circuit A Circuit A **
ø Liquid tube (narrow) 1/4”
(6,35 mm)
1/4”
(6,35 mm)
1/4”
(6,35 mm)
3/8”
(9,52 mm)
ø Gas tube (large) 1/2”
(12,7 mm)
1/2”
(12,7 mm)
1/2”
(12,7 mm)
5/8”
(15,88 mm)
Minimum pipe length 3 m 3 m 3 m 3 m
Maximumpipelengthwithout
additional refrigerant
SEEINSTALLATIONINSTRUCTIONS
OFOUTDOORUNIT
Maximumpipelengthwith
additional refrigerant
Additional charge per meter
NOTES
•Fortheconnectingpipes,usetheflarenutsprovidedwiththeunitornutsintendedfortheR410A.
•Minimumpipethickness:1mm.
•Utilise,ifnecessary,theadapterssuppliedwiththeoutdoorunit.
•Connecttheunitswiththeconnectingtubesinaccordancewiththeabovetable.
*IMPORTANT!
 ConnectEXCLUSIVELY
to the circuit «A» of the
outdoor unit.
4.1 - REFRIGERANT CONNECTION
Outdoorunit
indoor unit
Gas line
Liquid line
** For AUDH
Check in particular the
outdoor unit installation
instructions.

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4.2 - HYDRAULIC CONNECTION
4.2.1 - WATER INLET AND OUTLET CONNECTION
• Connect the water pipes to the corresponding connections (for diameters and position, see page 6).
• It is mandatory to install a hydraulic lter (1) (not supplied) on the water intake. Connect it using two
on-off valves (2) (not supplied) for cleaning purposes.
• Itisrecommendedtoinstallanti-vibrationexiblehoses(notsupplied),forthehydraulicconnections.
4.2.2 - WATER FILLING / DRAINAGE CONNECTION
• Provide at the lowest point of the hydraulic circuit, outside the unit, a circuit ll / discharge tting.
• To drain the hydraulic circuit, rst drain the water from the outside tting, then drain the residual water
into the unit through the drain plug (3). Place a pan under the plug or use a tube to avoid dropping
water on the oor.
4.2.2 - SAFETY VALVE CONNECTION
• Thesafetyvalveopensifthepressureofthehydraulicsystemexceeds3bar.
• Aexiblehose(4) (not supplied) can be connected to the coupling insert (coupling outside ø: 18 mm)
of the valve.
1
2
4
3
REAR VIEW
FRONT VIEW

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4.3 - ELECTRICAL CONNECTION
• Remove the front panel (fig.1).
NOTE:
The panel is connected with two wirestotheelectricaljunctionbox.Becarefulnottopullthewiresand,in
case, disconnect them.
• Removethecoverofelectricaljunctionboxtoaccesstheterminalblocks (fig. 2).
• Let the electrical wires pass rst in the wire grommets on the back of the unit and then in the wire glands
placed over the electrical panel (fig. 3).
• Connect the power line and interconnecting wires to the unit and secure them with the wire glands.
Fig. 2
Fig. 1
Fig. 3
TERMINAL BLOCKS
REAR VIEW
FRONT VIEW
FRONT VIEW
LN
1234 5678 C1 C2 C3 C4 C3 C3C4 C4 9101112131415161718192021
DHW VALVE EXT.BHU ALARM C OUTDOOR UNIT DATALOGGER 1 MODBUS GATEWAY DATALOGGER 2 2 ZONE CONTROL REMOTE DISPLAY ON/OFF H/C DHW ECO OAT 0-10V

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4 - SYSTEM WIRING DIAGRAMS
LENGTH, SIZE WIRES AND DELAYED FUSE
Supply power wire A:
Multipolar electric wire; the size of the suggested electric wire is shown on table. The wire must be Mod.
H07RN-F (according to CEI 20-19 CENELEC HD 22). Make sure the length of the conductors between the fixing
point and the terminals allows the straining of the conductors L, N before that of the grounding.
Connecting wire B (SHIELDED):
Bipolar electric shielded wire; the size of the suggested electric wire is shown on table. The wires have not to
be lighter than Mod. H05VVC4V5-K (according to CEI 20-20 CENELEC HD21).
Connecting wire C / D:
Multipolar electric wire; the size of the suggested electric wire is shown on table. The wires have not to be
lighter than Mod. H07RN-F (wire C) / H05RN-F (wire D), according to CEI 20-19 CENELEC HD22).
DELAYED FUSE Main switch for disconnection from
the supply line must have a contact
separation in all poles that provides
full disconnection under category III
overvoltage conditions.
220 - 240 V ~ 50 Hz
WIRING DIAGRAMS’ SYMBOLS
A B C D
S ( mm2) S ( mm2) S ( mm2) S ( mm2)
2,5 0,75 0,75 0,75 10 A
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT
NOTES
• Do not connect the power supply of Aqua Unit on the terminal block of outdoor unit.
• Connect the power supply under the same circuit breaker of outdoor unit.
• Checkoutmaximumpowerinputoncircuitbreaker(outdoorunit+AquaUnit).
• UsetheON/OFFbuttononthecontrolpaneltoswitchofftheunit.
• Aqua Unit must always be powered on, to allow internal protections (eg. anti-freeze) to be activated.
AQUA UNIT
5.1 - OUTDOOR UNIT CONNECTION
To dimension the
outdoor unit fuses,
see the outdoor unit
installation manual.

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• DHW VALVE
• EXTERNAL BACKUP HEATING
• ALARM / DEFROST
(1):DHWvalveclosingcommand.Phaseoutput230Vac/20Wmax.
(2): Neutral
(3):DHWvalveopeningcommand.Phaseoutput230Vac/20Wmax.
(4): Neutral
(5):Backupheatingactivationcommand.Phaseoutput230Vac/20Wmax.
Itisnecessarytoinsertanexternalbackupheatingpilotrelay(boiler,resistance,etc.).
(6): Neutral
(7):Alarm/defrostsignaling.Phaseoutput230Vac/20Wmax.
EXT.
5.2 - FULL CONFIGURATION
C
B
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
D
MODBUS
DATALOGGER 1
EXT.
SW3
A
B
OUTDOOR UNIT
C3
C3
C3
C4
C4
C4
C3
C4
C3
C4
C3
C4
5.3 - CONNECTIONS DETAILS

EG
14
• THERMOSTAT H/C
• If switch SW3 (see page 30) of main board is set on 12 Vdc, connect thermostat dry contact between
poles (11) and (12):
(11): Low voltage input
(12): 12 Vdc
Closed contact: cooling mode selected
Open contact: heating mode selected
• If switch SW3 (see page 30) of main board is set on 24 Vac, connect neutral of power supply 24 Vac to
terminal (8) and output 24 Vac of thermostat to terminal (11):
(8): Neutral 24 Vac
(11): Phase input 24 Vac
(12): Not connected
Powered input: cooling mode selected
Not powered input: heating mode selected
• THERMOSTAT ON/OFF
• If switch SW3 (see page 30) of main board is set on 12 Vdc, connect thermostat dry contact between
poles (9) and (10):
(9): Low voltage input
(10): 12 Vdc
Closed contact: heating / cooling request
Open contact: unit in standby
• If switch SW3 (see page 30) of main board is set on 24 Vac, connect neutral of power supply 24 Vac to
terminal (8) and output 24 Vac of thermostat to terminal (9):
(8): Neutral 24 Vac
(9): Phase input 24 Vac
(10): Not connected
Powered input: heating / cooling request
Not powered input: unit in standby
NOTE:Ontheterminals(9)and(10)ajumperispreinstalled(factorydefault).Removethejumperbe-
fore connecting the thermostat.

EG
15
• DHW CONTROLLER
• If switch SW3 (see page 30) of main board is set on 12 Vdc, connect thermostat dry contact between
poles (13) and (14):
(13): Low voltage input
(14): 12 Vdc
Closed contact: ACS production request / secondary setpoint selection
Open contact: normal mode
• If switch SW3 (see page 30) of main board is set on 24 Vac, connect neutral of power supply 24 Vac to
terminal (8) and output 24 Vac of thermostat to terminal (13):
(8): Neutral 24 Vac
(13): Phase input 24 Vac
(14): Not connected
Powered input: ACS production request / secondary setpoint selection
Not powered input: normal mode
• ECO MODE
• If switch SW3 (see page 30) of main board is set on 12 Vdc, connect thermostat dry contact between
poles (15) and (16):
(15): Low voltage input
(16): 12 Vdc
Closed contact: ECO mode selection (limitation of maximum power consumption)
Open contact: normal mode
• If switch SW3 (see page 30) of main board is set on 24 Vac, connect neutral of power supply 24 Vac
to terminal (8) and output 24 Vac of thermostat to terminal (15):
(8): Neutral 24 Vac
(15): Phase input 24 Vac
(16): Not connected
Powered input: ECO mode selection (limitation of maximum power consumption)
Not powered input: normal mode

EG
16
• OUTDOOR / MODBUS GATEWAY / 2 ZONE CONTROL / REMOTE CONTROLLER /
DATALOGGER (1 AND 2)
Connect terminals (C1) and (C2) to the corresponding terminals (C1) and (C2) of the outdoor unit, terminals
(C3) and (C4) to the corresponding terminals (C3) and (C4) of the connected unit (Remote controller, etc…).
Connect the shield of the communication wire to the corresponding ground wire.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
OUTDOOR
MODBUS
DATALOGGER 1
C3
C3
C3
C4
C4
C4
C3
C4
C3
C4
C3
C4
C1
C2
• OUTDOOR TEMPERATURE SENSOR (OAT)
INSTALLATION OF THE OUTDOOR TEMPERATURE SENSOR FOR HEAT PUMP OPERATION
This sensor must be located outside in a location that is representative of the temperature to be measured
(on a wall facing North / North-west) and located away from parasitic heat sources (chimney, thermal bridge,
etc..)andshelteredfrominclementweather(underaroofoverhand,forexample).
NOTE: The installation of this sensor is optional.
• ROOM TEMPERATURE CONTROLLER / SETPOINT CONTROLLER
(19): Low voltage ground
(20): Input 0-10 Vdc
(21): 12 Vdc

EG
17
WORKING MODE SELECTION WITH ON/OFF THERMOSTAT
WORKING MODE SELECTION WITH ON/OFF THERMOSTAT AND HEAT/COOLING (H/C)
NOTE:seeparagraph“STARTING”section“JUMPERS/SWITCHSETTING”-ENABLINGCOOLINGMODE
C
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT
C
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT
5.4 - CONNECTION EXAMPLES

EG
18
WORKING MODE SELECTION WITH ON/OFF THERMOSTAT AND ECO FUNCTION
WORKING MODE SELECTION WITH ON/OFF THERMOSTAT, THERMOSTAT FOR DHW
AND SAFETY THERMOSTAT
C
C
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT
C
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT

EG
19
WORKING MODE SELECTION WITHOUT THERMOSTAT
WORKING MODE SELECTION WITHOUT THERMOSTAT + SAFETY SWITCH
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT
C
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT

EG
20
WORKING MODE SELECTION WITH 0 - 10V ROOM TEMPERATURE CONTROLLER AND
DHW PRODUCTION
WORKING MODE SELECTION WITH 24 Vac THERMOSTAT AND DHW PRODUCTION
C
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT
A
EXT.
OUTDOOR UNIT
DATALOGGER 1
MODBUS GATEWAY
DATALOGGER 2
SW3
B
C3
C3
C3
C4
C4
C4
OUTDOOR UNIT