COSMOGAS ECOTWIN Manual de usuario
62403833 - R03 12-04-2021_UK
INSTALLATION, USE AND MAINTENANCE MANUAL
ECOTWIN
HEAT PUMP
1 - GENERAL SAFETY WARNINGS..............................................................................4
1.1 - National installation laws........................................................................................................... 4
2 - GENERAL INFORMATIONS.....................................................................................5
2.1 - Overview of the models ............................................................................................................ 5
2.2 - Accessories............................................................................................................................... 5
2.3 - Distributor ................................................................................................................................. 6
2.4 - Key to symbols used................................................................................................................. 6
2.5 - Maintenance ............................................................................................................................. 6
2.6 - Disposal .................................................................................................................................... 6
3 - HYDRAULIC CONNECTIONS..................................................................................7
4 - MAIN COMPONENTS...............................................................................................9
5 - OPERATION ...........................................................................................................12
5.1 - Intended use and function....................................................................................................... 12
5.2 - Available head to the heating / cooling system ....................................................................... 13
5.3 - Ecotwin with one heating/cooling circuit and DHW................................................................. 16
5.3.1- Conguration for one heating/cooling circuit and DHW .............................................................17
5.4 - Ecotwin with one heating/cooling circuit, DHW and a buer tank........................................... 18
5.4.1- Conguration for one heating/cooling circuit, DHW and a buer tank........................................19
5.5 - Ecotwin with one heating/cooling circuit, DHW, a buer tank and a boiler ............................. 20
5.5.1 - Conguration for one heating/cooling circuit, DHW, a buer tank and a boiler .........................21
5.6 - Ecotwin with double heating/cooling circuit, DHW, a buer tank and a boiler......................... 22
5.6.1 - Conguration for double heating/cooling circuit, DHW, a buer tank and a boiler ....................23
6 - INSTALLATION .......................................................................................................25
6.1 - Opening the package.............................................................................................................. 25
6.2 - GS indoor unit dimensions...................................................................................................... 25
6.3 - Minimum clearance distances of GS indoor unit..................................................................... 25
6.4 - Minimum clearance distances of STM outdoor unit ................................................................ 26
6.6 - Warnings before installation.................................................................................................... 28
6.7 - Choosing the installation location of GS indoor unit ............................................................... 28
6.8 - Choosing the installation location of STM outdoor unit........................................................... 28
6.8.1 - Mounting the appliance .............................................................................................................29
6.8.2 - STM outdoor unit condensate drain installation ........................................................................29
6.8.3 - Installation in cold and snowy areas .........................................................................................30
6.9 - Heating/Cooling supply and return.......................................................................................... 30
6.10 - Radiant panel systems (or low temperature) ........................................................................ 31
6.11 - Domestic hot and cold water ................................................................................................. 31
6.12 - Antilegionella......................................................................................................................... 31
6.13 - Distances between indoor and outdoor unit.......................................................................... 32
6.14 - Wall mounting of the GS indoor unit ..................................................................................... 33
6.15 - Installation of the safety kit in the GS indoor unit.................................................................. 34
6.16 - Refrigerant connections ........................................................................................................ 35
6.16.1 - Connections for the refrigerant gas circuit...............................................................................36
6.16.2 - Checking the tightness of the refrigerant circuit ......................................................................38
6.16.3 - Evacuation of the air from the refrigerant circuit and release the refrigerant ..........................38
6.16.4 - Refrigerant addition according to the length of the refrigerant circuit......................................39
6.17 - Electrical connections: general information .......................................................................... 39
6.17.1 - Electrical supply connection of GS indoor unit ........................................................................42
6.17.2 - Electrical supply connection of STM outdoor unit ...................................................................42
7 - START UP...............................................................................................................45
7.1 - Before starting......................................................................................................................... 45
7.1.1 - User instructions........................................................................................................................45
7.1.2 - Filling the heating / cooling circuit .............................................................................................45
7.2 - Emergency operation ............................................................................................................. 45
7.3 - Start up ................................................................................................................................... 46
CONTENTS
3ecotwin
COSMOGAS
CONTENTS
7.4 - Choosing the heating / cooling mode...................................................................................... 46
8 - USE.........................................................................................................................47
8.1 - Display .................................................................................................................................... 47
8.2 - Settings ................................................................................................................................... 49
8.2.1 - ZONE 1 ....................................................................................................................................50
8.2.2 - ZONE 2 ....................................................................................................................................52
8.2.3 - DHW .........................................................................................................................................55
8.2.4 - DHW storage.............................................................................................................................56
8.2.5 - NIGHT ......................................................................................................................................57
8.2.6 - LEGIONELLA ............................................................................................................................57
8.2.7 - VACATION.................................................................................................................................58
8.2.8 - USER ........................................................................................................................................59
8.2.9 - WORKING MODE .....................................................................................................................60
8.2.10 - BACK-UP ................................................................................................................................61
8.2.11 - WATER PUMPS ......................................................................................................................62
8.2.12 - ELECTRIC LOCK....................................................................................................................63
8.2.13 - OTHER OPTIONS...................................................................................................................64
8.2.14 - REAL TIME DATA....................................................................................................................66
8.2.15 - Info ..........................................................................................................................................67
8.2.16 - Home page..............................................................................................................................67
9 - DIAGNOSTICS........................................................................................................68
10 - MAINTENANCE ....................................................................................................72
10.1 - General warnings.................................................................................................................. 72
10.2 - Maintenance protocol............................................................................................................ 72
10.3 - Check the water pressure in the system and there are no leaks .......................................... 73
10.4 - Check the good condition of the safety valve ....................................................................... 73
10.5 - Check and clean the safety exhaust valve system ............................................................... 73
10.6 - Check the good condition of the safety and control devicees............................................... 73
10.7 - Check the good conditions of the electrical system .............................................................. 73
10.8 - Check the operation of the main switch ................................................................................ 73
10.9 - Check the temperature adjustment in heating and DHW...................................................... 73
10.10 - Check the good conditions and operation of the vent valves present................................. 73
10.12 - Check that the evapocondensing battery is clean .............................................................. 73
10.13 - Check there are no leaks in the refrigerant circuit .............................................................. 73
10.14 - Check the good conditions of the electrical connections .................................................... 73
10.15 - Check the status of the fan ................................................................................................. 73
10.16 - Check the control devices................................................................................................... 73
10.17 - Check the operating pressures of the refrigerant circuit ..................................................... 74
10.18 - Refrigerant circuit repairs.................................................................................................... 74
10.19 - Filling the refrigerant circuit................................................................................................. 74
10.20 - Replace the pump............................................................................................................... 74
10.21 - Cleaning the lter ................................................................................................................ 74
10.22 - Refrigerant accumulation in outdoor unit ............................................................................ 74
10.23 - Draining the heating circuit ................................................................................................. 74
10.24 - Remove the casing and access to the internal components of the GS unit........................ 75
10.25 - Remove the casing and access to the internal components of the STM ............................ 75
10.26 - Wiring diagram.................................................................................................................... 76
11 - TECHNICAL DATA................................................................................................. 80
12 -EU CONFORMITY DECLARATION....................................................................... 82
13 - PRODUCT FICHE.................................................................................................83
4COSMOGAS
Ecotwin
1 - GENERAL SAFETY WARNINGS
Installation, changes
The gas appliance must be installed, calibrated or modied
by qualied installer, in compliance with national and local
regulations, as well as the instructions in this manual.
Incorrect installation or poor maintenance can cause
damage or injury to persons, animals or objects, for which
the manufacturer cannot be deemed liable.
A water temperature higher than 51°C can also cause
permanent damage to people, animals and objects. Above
all, children, the older people and people with disabilities
must be protected against potential risks of scalds, by
inserting devices that limit the temperature of the DHW.
It is forbidden to leave any parts of the packaging or any
replaced parts within the reach of children.
Before performing any cleaning or maintenance operations,
disconnect the appliance from the power supply, water and
gas supply, using the appropriate devices.
After having performed any cleaning or maintenance
operations, make sure that all internal parts of the appliance
are dry before reconnecting the electric power supply.
This appliance is not intended for use by persons (including
children) with reduced physical, sensory and mental
capabilities or a lack of experience or knowledge, unless
they are supervised or have been instructed on use of the
appliance by a person responsible for their safety.
This manual is an integral and essential part of the
product and must be kept carefully by the user for future
consultation. If the appliance needs to be transferred or if
you should move and leave the unit to another user, always
ensure that this manual remains with the new user and/or
installer.
Any options or kits added later must be original Cosmogas
products.
This appliance must be intended only for the use for which it
has been expressly declared: central heating/cooling water
for closed circuits intended for central heating/cooling of
rooms for civil and domestic use, production of domestic
hot water for civil use.
Any contractual and non-contractual liability on the part
of the manufacturer is excluded for damage caused by
installation errors or usage errors and, in all cases, following
a failure to comply with the instructions given by the
manufacturer or with applicable national and/or local laws.
For safety reasons and to safeguard the environment, the
packaging components must be disposed of in the relevant
separate waste collection centres.
R410A refrigerant
This appliance contains uorinated greenhouse gases
covered by the Kyoto Protocol: the installation must
be carried out by an installer / company authorized in
accordance with the European regulation EU 517/2014.
Vapors are heavier than air and can cause asphyxiation by
reducing the amount of oxygen.
Liqueed gas: contact with liquid can cause frostbite and
serious eye damage.
Product classication: this product is not classied as
a “dangerous preparation” according to the European
Community regulations.
If the R410A refrigerant is mixed with air, it can cause
pressure peaks in the refrigeration pipes and generate an
explosion or other hazards.
Refrigerant and piping:
Use only R410A refrigerant liquid to ll the system.
Use tools and piping components specially designed for
use with R410A refrigerant liquid.
Use phosphorus deoxidized copper pipes for transporting
the refrigerant.
Store the refrigerant connection pipes away from dust and
humidity (risk of damage to the compressor).
Do not use charging cylinders.
Protect the components of the heat pump, including
insulation and structural elements. Do not overheat the
pipes: the brazed elements can cause damage.
Contact of the refrigerant uid with a ame can cause
emanations of toxic gases.
Refrigerant leaks:
1. Shut o the appliance.
2. Open windows.
3. Do not use open ames.
4. Avoid any contact with the refrigerant.
5. Identify the probable leak and correct the problem
immediately.
In case of failure
In the event of a fault and / or malfunction of the appliance,
deactivate it, refraining from any attempt to repair. Contact a
professionally qualied technician only. If components need
to be replaced for repairs, they must be original spare parts
only. Failure to comply with this may compromise the safety
of the appliance.
Qualied installer.
A ‘qualied installer’ means a person with specic technical
skill in sector of central heating system components and
production of domestic hot water for sanitary and civil uses,
electric installations, and systems for the use of combustible
gas. Such people must have the skills envisaged by the law.
Technical drawings
All the drawings shown in this manual relating to electrical,
hydraulic or gas installation systems must be understood to
be purely illustrative. All the safety devices, auxiliary devices
and the diameters of the electrical, hydraulic and gas pipes
must always be checked by a qualied installer, to make sure
they satisfy the applicable laws and regulations.
1.1 - National installation laws
Respect the national regulations, provisions, directives and
laws in force.
5ecotwin
COSMOGAS
2 - GENERAL INFORMATIONS
2.1 - Overview of the models
2.2 - Accessories
The appliance is supplied with the following accessories:
GS UNIT
Quantity N°. Description Figure
N°. 1 ROOM TEMPERATURE TR
N°. 1 DHW TEMPERATURE SENSOR TW
N°. 1 HEATING/COOLING TEMPERATURE SENSOR TC
N°. 1 TV1 SENSOR HEATING/COOLING CIRCUIT
N°. 1 TV2 SENSOR HEATING/COOLING CIRCUIT
N°. 5 SENSOR EXTENSION CABLES
N°. 1 SAFETY KIT
GS/STM XX
6 = Heat pump with modulating heat output between 1,98 and 6,2 kW
9 = Heat pump with modulating heat output between 4,33 and 10,1 kW
13 = Heat pump with modulating heat output between 4,2 and 12,6 kW
STM:Heat pump for outdoor installation, central heating/cooling and
DHW production.
GS:Hydronic module for indoor installation, central heating/cooling and
DHW production with buer tank .
STM UNIT
Quantity N°. Description Figure
N°. 1 CONDENSATE DRAIN CONNECTION
6COSMOGAS
Ecotwin
2 - GENERAL INFORMATIONS
2.3 - Distributor
COSMOGAS srl
Via L. da Vinci 16
47014 - Meldola (FC) Italia
Tel. 0543 498383
Fax. 0543 498393
www.cosmogas.com
2.4 - Key to symbols used
WARNING!!!
Electric shock hazard Failure to comply with these warnings
may compromise the working order of the appliance or cause
serious damage or injury to persons, animals or objects.
WARNING!!!
Failure to comply with these warnings may compromise the
working order of the appliance or cause serious damage or
injury to persons, animals or objects.
PROHIBITION !!!
Generic hazard. Failure to comply with these warnings may
compromise the working order of the appliance or cause
serious damage or injury to persons, animals or objects.
Important indication symbol.
N/A : Not applicable.
2.5 - Maintenance
A regular annual maintenance check on the appliance is
advised for the following reasons:
- to maintain high eciency and manage the central heating
system economically (with low fuel consumption);
- to achieve a high level of safety operation.
2.6 - Disposal
The crossed wheelie bin symbol means that the product
must not be thrown away in the ordinary rubbish bin (i.e. in
with “mixed urban rubbish”); it must be dealt with separately,
in order to undergo suitable operations for it to be reused
or threated, so that any substances that are dangerous for
the environment can be removed and safely disposed. This
will enable all the raw materials to be recycled. The user is
responsible for getting rid of the boiler at the end of its life,
delivering it to a recycling centre run by the local authority
or city hygiene companies, or, when he/she buys a new
appliance, giving the product that has been replaced to
the dealer, who is obliged to take it under the terms of EU
Directive 2012/19/EU. For further information regarding correct
decommissioning of these units, users can contact the public
service in charge or retailers.
7ecotwin
COSMOGAS
3 - HYDRAULIC CONNECTIONS
Figure 3-1 - Main components and connection diameters of the GS unit
Refrigerant connections
(gas line)
GS 06/09: ½”
GS 13: 5/8”
Refrigerant connections
(liquid line)
GS 06: 1/4”
GS 09: 3/8”
GS 13: 3/8”
Safety valve kit
Cable glands
Control panel
Heating / cooling
water outlet : 1”
Water inlet : 1”
Water outlet to
DHW tank: 1”
Electrical resistance
Digital thermostat (*)
Pump
Door
Electrical compartment
Electrical terminals
(*) Digital thermostat = DHW emergency thermostat: if it is enabled, at a certain setpoint (max 75 ° C), it activates the internal
pump and heats the domestic water to the setpoint. To use this thermostat refer to section 7.2.
WARNING !!! The digital thermostat can only be activated if there is a domestic hot water tank (Figure from
5-4 to 5-10).
8COSMOGAS
Ecotwin
3 - HYDRAULIC CONNECTIONS
Figure 3-3 - Main components and connection diameters of the STM13 unit
Figure 3-2 - Main components and connection diameters of the STM06 - STM09 unit
Electrical
connections cover
Refrigerant connection
(liquid line)
STM 06:1/4”
STM 09: 3/8”
Refrigerant connection
(gas line) : 1/2”
Valve cover
Valve cover
Refrigerant connection
(gas line) : 5/8”
Refrigerant
connection
(liquid line): 3/8”
Electrical
connections
cover
Air
Inlet
Air
Inlet
Air
Outlet
Air
Outlet
9ecotwin
COSMOGAS
Electrical
connections cover
Electrical
connections
cover
4 - MAIN COMPONENTS
Figure 4-1 - GS unit internal components
1 - Control panel
2 - Door
3 - Cover of electrical compartment
4 - Electrical compartment
5 - Fuse box
6 - 3-way valve
7 - Pump
8 - Electric heater
9 - Refrigerant expansion tank (STM 06/09)
10 - Casing
11 - Box connections
12 - Liquid line connection
13 - Safety kit
14 - Gas line connection
15 - Wall brachet
16 - Water ow switch
17 - Water connection
18 - T valve
19 - Plate heat exchanger bracket
20 - Water connection
21 - Template connections
22 - Cable glands connection
23 - Plate heat exchanger brachet
24 - Liquid line temperature sensor (TUP)
25 - Plate heat exchanger
26 - Supply temperature sensor (TUO)
27 - DHW temperature sensor (Tw)
28 - Circuit 1 temperature sensor (TV1)
29 - Circuit 2 temperature sensor (TV2)
30 - Heating/Cooling temperature sensor (Tc)
31 - Temperature sensor (Tr)
32 - High limit safety thermostat
33 - DHW safety thermostat (max 75°C)
35 - Return temperature sensor (TUI)
36 - Control board
10 COSMOGAS
Ecotwin
4 - MAIN COMPONENTS
26
27
28
8
9
5
6
7
1
23
4
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
29
34
Figure 4-2 - STM 06 and STM 09 unit internal components
1 - Fan grid
2 - Outdoor fan
3 - Fan motor
4 - Front panel
5 - Air direction
6 - Brachet
7 - Motor support
8 - Angle
9 - 4-way valve
10 - Electrical box
11 - Electrical box cover
12 - Upper cover
13 - Bottom cover
14 - Evapo-condensing battery
15 - Partition
16 - Right panel
17 - Floor heater wire
18 - Junction box cover
19 - Partition
20 - Refrigerant connection
21 - Refrigerant connection
22 - Connection cover
23 - Compressor
24 - Foot
25 - Lower panel
26 - Expansion valve coil
27 - Electronic expansion valve (EEV)
28 - Compressor heater
29 - Outdoor temperature sensor
34 - Evapo-condensing battery temperature sensor
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