COSMOGAS AGUADENS Series Service manual

62403581 - R01 09-03-2020_UK
INSTALLATION, USE
AND MAINTENANCE
MANUAL
AGUADENS
GAS WALL-MOUNTED
CONDENSING BOILER

2
AGUADENS COSMOGAS
CONTENTS
1 - GENERAL SAFETY WARNINGS....................................................................................................................4
1.1 - National laws and regulations .................................................................................................................................. 5
2 - GENERAL INFORMATION .............................................................................................................................6
2.1 - Presentation ............................................................................................................................................................. 6
2.2 - Overview of models.................................................................................................................................................. 6
2.3 - Accessories .............................................................................................................................................................. 6
2.4 - Manufacturer ............................................................................................................................................................ 7
2.5 - Meaning of symbols used ........................................................................................................................................ 7
2.6 - Maintenance............................................................................................................................................................. 7
2.7 - Disposal ................................................................................................................................................................... 7
3 - MAIN COMPONENTS.....................................................................................................................................8
4 - OPERATION .................................................................................................................................................12
4.1 - Operation and intended use of the appliance ........................................................................................................ 13
4.2 - Examples of installation ......................................................................................................................................... 14
5 - INSTALLATION .............................................................................................................................................16
5.1 - Opening the package ............................................................................................................................................. 16
5.2 - Dimensions and minimum distances to be observed............................................................................................. 16
5.3 - Choosing where to install the appliance................................................................................................................. 16
5.4 - Unit assembly......................................................................................................................................................... 16
5.5 - Domestic hot and cold water.................................................................................................................................. 16
5.6 - Gas......................................................................................................................................................................... 17
5.7 - Condensate drain................................................................................................................................................... 18
5.8 - Safety valve............................................................................................................................................................ 18
5.9 - Hydraulic and gas connections, and mounting of the lower cover ......................................................................... 19
5.10 - Polyphosphate softener (on request) ................................................................................................................... 19
5.11 - Electrical connections: details .............................................................................................................................. 20
5.11.1 - Connecting power supply cable .............................................................................................................. 21
5.11.2 - CR04 remote time control (on request)................................................................................................... 21
5.11.3 - Alarm contact .......................................................................................................................................... 21
5.12 - Recirculation with external pump ......................................................................................................................... 22
5.13 - Recirculation with internal pump ......................................................................................................................... 22
5.14 - Connection of hot water heater to storage tank ................................................................................................... 23
5.14.1 - Anti-legionella.......................................................................................................................................... 23
5.15 - Cascade appliances connection .......................................................................................................................... 24
5.15.1.- Cascade appliances connection ............................................................................................................. 24
5.15.2.- Cascade appliances connection with storage tank ................................................................................. 26
5.16 - Burned gas exhaust and combustion agent air intake pipe ................................................................................. 28
5.16.1 - Type of intake/exhaust B23 and B23P.................................................................................................... 29
5.16.2 - “Split 80/80PP” system (polypropylene) (type C43; C53; C83; C93) AGUADENS 16 and 22 ................ 30
5.16.3 - “Split 80/80PP” system (polypropylene) (type C43; C53; C83; C93) AGUADENS 37 ............................ 31
5.16.4 - “Split 80/80PP” system (type C43; C53; C83; C93): accessories available............................................ 32
5.16.5 - “Split 80/80PP” system (type C43; C53; C83; C93): installation examples ............................................ 33
5.16.6 - “60/100PP vertical coaxial” system (polypropylene) (type C13; C33) AGUADENS 16 and 22............... 34
5.16.7 - “60/100PP horizontal coaxial” system (polypropylene) (type C13; C33) AGUADENS 16 and 22 .......... 35
5.16.8 - “60/100PP coaxial” system: accessories available ................................................................................. 36
5.16.9 - “60/100PP coaxial” system: installation examples.................................................................................. 37
5.16.10 - “80/125PP vertical coaxial” system (polypropylene) (type C13; C33) AGUADENS 37......................... 38
5.16.11 - “80/125PP coaxial” system: accessories available ............................................................................... 39
5.16.12 - “80/125PP coaxial” system: installation examples................................................................................ 40
5.16.13 - “80PP single” system (polypropylene) (type B23 or B23P) AGUADENS 16 and 22............................. 41
5.16.14 - “80PP single” system: accessories available........................................................................................ 41
6 - START-UP.....................................................................................................................................................42
6.1 - Start-up .................................................................................................................................................................. 42
6.1.1 - Instructions to the user.............................................................................................................................. 42
6.1.2 - Filling the condensate drain siphon .......................................................................................................... 42
6.2 - General recommendations regarding the gas supply ............................................................................................ 42
6.3 - Type of gas for which the appliance is set. ............................................................................................................ 43
6.4 - Conversion of the appliance from one type of gas to another................................................................................ 43
6.5 - Ignition.................................................................................................................................................................... 45
6.6 - Controlling the supply gas pressure and any adjustments..................................................................................... 45
6.7 - Controlling the level of CO2 and any adjustments ................................................................................................. 46
6.8 - Automatic learning and calibration of minimum and maximum power ................................................................... 47

3AGUADENS
COSMOGAS
CONTENTS
6.9 - Adjusting the domestic hot water ow rate............................................................................................................. 47
6.10 - Checking the maximum heat input....................................................................................................................... 47
7 - USE...............................................................................................................................................................48
7.1 - General information................................................................................................................................................ 48
7.2 - Ignition procedure .................................................................................................................................................. 48
7.3 - Adjusting the hot water temperature ...................................................................................................................... 49
7.4 - Time settings for the various functions................................................................................................................... 49
7.5 - Anti-freeze protection ............................................................................................................................................. 49
7.6 - “User prole” .......................................................................................................................................................... 50
7.7 - “Installer prole” ..................................................................................................................................................... 52
7.7.1 - Parameters for cascade systems.............................................................................................................. 56
7.8 - Diagnostics............................................................................................................................................................. 57
7.8.1 - Diagnostics: lockouts “Loc” ....................................................................................................................... 57
Check that the water ow (1062) is higher than the value of parameter 2140..................................................... 62
Check the correct connection to the display, to the pressure sensor and to the water ow sensor. .................... 63
7.8.2 - Diagnostics: errors “Err”............................................................................................................................ 60
7.8.3 - Diagnostics: alarms “AttE” ........................................................................................................................ 63
7.9 - Turning the appliance on and o󰀨............................................................................................................................ 63
8 - MAINTENANCE ............................................................................................................................................64
8.1 - General recommendations..................................................................................................................................... 64
8.2 - Maintenance protocol............................................................................................................................................. 65
8.2.1 - Checking there are no water leaks ........................................................................................................... 65
8.2.2 - Checking the gas pressure and any leaks ................................................................................................ 65
8.2.3 - Checking the condition of the safety valve................................................................................................ 65
8.2.4 - Checking the condition of the safety and control devices ......................................................................... 66
8.2.5 - Checking the condition of the electrical system ........................................................................................ 66
8.2.6 - Checking the operation of the main switch ............................................................................................... 66
8.2.7 - Checking the correspondence of the adjusted temperatures in the domestic hot water system .............. 66
8.2.8 - Checking if the device is triggered in the event of gas failure................................................................... 66
8.2.9 - Checking the condition of the air intake and ue exhaust ducts ............................................................... 66
8.2.10 - Checking the ignition and detection electrodes ..................................................................................... 66
8.2.11 - Checking the condition of the air vent valves.......................................................................................... 66
8.3 - Removing the casing and accessing the internal components .............................................................................. 67
8.4 - Dismantling the burner fan assembly..................................................................................................................... 68
8.5 - Cleaning the burner and the primary heat exchanger (ue gas side) .................................................................... 68
8.6 - Correctly positioning the ignition and detection electrodes ................................................................................... 69
8.7 - Dismantling the ignition and detection electrodes ................................................................................................. 69
8.8 - Dismantling and replacing the gas valve................................................................................................................ 70
8.9 - Cleaning the condensate conveyor siphon ............................................................................................................ 71
8.10 - Replacing the pump ............................................................................................................................................. 72
8.11 - Removing the domestic hot water ow meter ...................................................................................................... 72
8.12 - Removing the safety valve ................................................................................................................................... 72
8.13 - Emptying the appliance on the domestic hot water side ...................................................................................... 73
8.14 - Minimum and maximum power ........................................................................................................................... 73
8.15 - Checking the ionisation current............................................................................................................................ 73
8.16 - Water temperature measurement sensors........................................................................................................... 73
8.17 - Wiring diagram ..................................................................................................................................................... 74
9 - TECHNICAL DATA ........................................................................................................................................76
10 - COMMAND MENU DIAGRAM....................................................................................................................78
11 - UE DECLARATION OF COMPLIANCE ......................................................................................................79
12 - PRODUCT FICHE.......................................................................................................................................80

4
AGUADENS COSMOGAS
If you smell gas
1.- Close the gas cock;
2.- Ventilate the room;
3.- Do not switch on any electric device, including a telephone;
4.- From another room, immediately call a professionally
qualied technician or the gas supply company. Call the
Fire Service if the former are not available.
If you can smell combustion products
1.- Switch the appliance o󰀨;
2.- Ventilate the room;
3.- Call a professionally qualied technician.
Explosive or highly ammable products
Do not store or use explosive materials or highly ammable
materials such as paper, solvents, paints, etc. in the room
where the appliance is installed.
Installation, modications
The gas appliance must be installed, calibrated and
modied by professionally qualied sta󰀨, 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.
The appliance exhaust must be connected to a burned
gas evacuation pipe. Failure to comply with this regulation
leads to serious risks for the safety of persons and animals.
A domestic hot water temperature exceeding 51°C can
cause permanent damage or injury to persons, animals
and objects. In particular, protect children, the elderly and
people with disabilities against any possible risks of scalds,
by inserting devices that limit the usage temperature of the
DHW to users.
The parts conducting the ue gas must not be modied.
Do not obstruct the ends of the intake/exhaust pipes.
Do not leave parts of the packaging and any replaced parts
within the reach of children.
Seal the adjustment devices after every calibration.
In agreement with the provisions for use, the user must
keep the installation in good working order and guarantee
reliable and safe operation of the appliance.
We would also highlight the benet of an annual scheduled
maintenance contract with a professionally qualified
technician.
The user must have maintenance performed on the
appliance by a professionally qualified technician in
compliance with national and local regulations and this
manual.
Before performing any cleaning or maintenance operations,
disconnect the appliance from the mains power supply and/
or use the cut-o󰀨 devices.
After having performed any cleaning or maintenance
operations, make sure that all internal parts of the appliance
are dry before re-connecting 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 retained 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 storage tank must be used only for the purpose for
which it was expressly intended: the production of hot water
for domestic and sanitary uses 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.
In case of breakdown
In the event of a fault and/or poor operation of the appliance,
disconnect it and do not attempt to carry out any repairs.
Contact a professionally qualified technician only. If
components need to be replaced, these must be original spare
parts. Failure to comply with the above may jeopardise the
safety of the appliance.
Professionally qualied technicians.
A ‘professionally qualied technician’ means a person with
specic technical skill in the sector of central heating system
components and the 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
as well as the diameters of the electrical, hydraulic and gas
pipes, must always be checked by a professionally qualied
technician, to make sure they satisfy the applicable laws and
regulations.
1 - GENERAL SAFETY WARNINGS

5AGUADENS
COSMOGAS
1 - GENERAL SAFETY WARNINGS
1.1 - National laws and regulations
- M.D. n°37 dated 22/01/2008 (former Law n°46 dated 05/03/90)
- Law n°10 dated 09/01/91
- Presidential Decree n°412 dated 26/08/93
- Presidential Decree n°551 dated 21/12/99
- Legislative Decree n° 192 dated 19/08/05
- Legislative Decree n° 311 dated 29.12.06
- UNI 7129 Standard
- UNI 7131 Standard
- UNI 11071 Standard
- IEC 64-8 Standard
All the gas appliances must be installed by a competent
and qualied person, in accordance with relevant clauses of
applicable standards and raccomandations. These include
but may not be limited to the following:
- I.S. 813 Domestic gas installations.
- I.S. 820 Non-Domestic gas installations.
- IEE Wiring Regulations.
- BS 5546:2010 - Specication for installation and maintenance
of gas-fired water-heating appliances of rated input not
exceeding 70 kW net.
- BS 5440-2:2009 - Flueing and ventilation for gas appliances
of rated input not exceeding 70 kW net (1st, 2nd and 3rd family
gases) specication for the installation and maintenance of
ventilation provision for gas appliances.
- BS 6644:2011 - Specification for the installation and
maintenance of gas-red hot water boilers of rated inputs
between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family
gases).
- BS 6891:2005+A2:2008 - Installation of low pressure gas
pipework of up to 35 mm (R1 1/4) in domestic premises (2nd
family gas) specication.
- BS 5482-1:2005 - Code of practice for domestic butane and
propane gas burning installations. Installations at permanent
dwellings, residential park homes and commercial premises,
with installation pipework sizes not exceeding DN 25 for steel
and DN 28 for corrugate stianless steel or copper.
- BS 5482-2:AMD 12046: June 2001 - Domestic butane and
propane gas burning installations. Installations in caravans
and non-permanent dwellings.
- BS 5482-3:2005 - Domestic butane and propane gas burning
installations. Installations in boats yachts and other vessels.
- Building regulations issued by Department of the Environment
and Building Standards Regulations.
- Gas safety (Installation and Use) Regulations current issue.
- BS 6700 - Design, installation, testing and maintenance of
services supplying water for domestic use within buildings
and their cartilages - Specication.
- UK Health and safety at work Act.
- All relevant Building Regulations.
- Local Water Bye Laws.
- Water Regulations.
- Health & Safety legislation.
Failure to install this appliance correctly could lead to
prosecution. It is your own interest and that of safety to ensure
that the law is complied with. Manufacturer’s instructions must
not be interpreted as over-riding statutory obligations under
any circumstances.

6
AGUADENS COSMOGAS
2.1 - Presentation
Congratulations! You have purchased one of the best products on the market.
Each individual part is proudly designed, manufactured, tested and assembled within the COSMOGAS
facilities, thus guaranteeing the best quality control.
AGUADENS XX
16 = Boiler with maximum heat input of 25.5 kW
22 = Boiler with maximum heat input of 32.0 kW
37 = Boiler with maximum heat input of 57.8 kW
Internal gas condensing boiler with premixed burner with low emissions of
pollutants.
2 - GENERAL INFORMATION
2.2 - Overview of models
2.3 - Accessories
The accessories, in some models, could be not supplied with the appliance.
Quantity No. Description Code Figure
N° 1 LOWER COVER Only in the 16 and 22 models 61405266
N° 1 GAS CONVERSION KIT
For 16 models 62630310
For 22 models 62630311
For 37 models 62630277
N° 1 PREINSTALLATION TEMPLATE Only in the 16 and 22 models 61804019

7AGUADENS
COSMOGAS
2.4 - Manufacturer
COSMOGAS srl
Via L. da Vinci 16
47014 - Meldola (FC) Italy
Tel. [phone]
Fax. [phone]
www.cosmogas.com
[email protected]
2.5 - Meaning of symbols used
WARNING!
Danger of electric shocks. If these warnings are not heeded it
can jeopardise correct operation of the boiler or cause serious
injury or damage to people, animals or things.
WARNING!
Generic danger. Failure to comply with these warnings may
jeopardise the working order of the appliance or cause serious
damage or injury to persons, animals or things.
Important indication symbol
2.6 - Maintenance
A regular annual maintenance check on the appliance is
advised for the following reasons:
- to maintain high e󰀩ciency and manage the domestic hot
water system economically (with low fuel consumption);
- to achieve a high level of operating safety;
- to maintain a high level of environmental combustion
compatibility.
O󰀨er your customer a scheduled maintenance contract.
2.7 - 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
treated, so that any substances that are dangerous for the
environment can be removed and disposed of safely. 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 boiler,
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 appliances, users can contact the public service in
charge or retailers.
2 - GENERAL INFORMATION

8
AGUADENS COSMOGAS
1 - Command and control board
2 - Electric connections board
3 - ----------
4 - Lower cover
5 - ----------
6 - Water ow rate gauge
7 - Cold water inlet temperature sensor (1007)
8 - Fan
9 - ----------
10 - ----------
11 - Dual DHW outlet sensor (1001 and 1005)
12 - ----------
13 - ----------
14 - Pump
15 - Detection electrode
16 - Support brackets
17 - ----------
18 - ----------
19 - Air intake and burned gas exhaust ttings
20 - Combustion analysis points
21 - Flue gas temperature sensor (1006).
22 - Spark generator
23 - Ignition cables
24 - Back ue preventer valve
25 - Air inlet manifold
26 - Gas valve
27 - Front casing
28 - Safety valve
29 - Display
30 - Control panel
31 - ----------
3 - MAIN COMPONENTS
Figure 3-1 - Internal components of AGUADENS 16 and 22
7
6
46
48
45
25
16
26
8
2
4
24
22
23
19
15
16
20
1
21
47
28
30
11
29
14
27
020003.01.057

9AGUADENS
COSMOGAS
32 - ----------
33 - Front casing couplings
34 - ----------
35 - Ignition electrodes
36 - Burner pilot light
37 - Drain pipe for any water coming from the combustion
agent air pipe
38 - Burner
39 - Air/gas mixing group
40 - Condensate drain siphon
41 - Safety valve drain pipe
42 - ----------
43 - Condensate collection tank
44 - ----------
3 - MAIN COMPONENTS
Figure 3-2 - Internal components of AGUADENS 16 and 22
33
35
38
37
40
39
43
41
36
020003.01.058
45 - Flue gas temperature fuse
46 - DHW temperature sensor (1002)
47 - Air vent valve
48 - Primary heat exchanger temperature fuse

10
AGUADENS COSMOGAS
1 - Command and control board
2 - Electric connections board
3 - ----------
4 - ----------
5 - ----------
6 - Water ow rate gauge
7 - Cold water inlet temperature sensor (1007)
8 - Fan
9 - ----------
10 - ----------
11 - Dual DHW outlet sensor (1001 and 1005)
12 - ----------
13 - ----------
14 - Pump
15 - Detection electrode
16 - Support brackets
17 - ----------
18 - ----------
19 - Air intake and burned gas exhaust ttings
20 - ----------
21 - Flue gas temperature sensor (1006)
22 - Spark generator
23 - Ignition cables
24 - Back ue preventer valve
25 - Air inlet manifold
26 - Gas valve
27 - Front casing
28 - Safety valve
29 - Display
30 - Control panel
31 - ----------
3 - MAIN COMPONENTS
Figure 3-3 - Internal components of AGUADENS 37
6
16
19
16
48
25
26
8
45
24
15
2
22
23
14
28
1
30
21
11
46
29
27
020008.01.019

11 AGUADENS
COSMOGAS
32 - ----------
33 - Front casing couplings
34 - ----------
35 - Ignition electrodes
36 - Burner pilot light
37 - Drain pipe for any water coming from the combustion
agent air pipe
38 - Burner
39 - Air/gas mixing group
40 - Condensate drain siphon
41 - Safety valve drain pipe
42 - ----------
43 - Condensate collection tank
44 - ----------
45 - Flue gas temperature fuse
3 - MAIN COMPONENTS
Figure 3-4 - Internal components of AGUADENS 37
46 - DHW temperature sensor (1002)
47 - Air bleed valve
47 - Air vent valve
48 - Primary heat exchanger temperature fuse
41
28
33
40
41
37
43
7
38
47
35
39
36
41
28
33
40
41
37
43
7
38
47
35
39
36
020008.01.020

12
AGUADENS COSMOGAS
Figure 4-1 Key:
1 = Hot water heater
2 = Combustion agent air inlet
3 = Flue gas outlet
4 = Flue gas temperature sensor (Par. 1006)
5 = Flue gas temperature fuse
6 = Sealed chamber
7 = Water collection pipe coming from the combustion agent
inlet pipe
8 = Sensor 1 DHW outlet temperature (Par. 1001)
9 = Sensor 2 DHW outlet temperature (Par. 1005)
10 = Burner
11 = Heat exchanger
12 = Fan
13 = Cold water inlet temperature sensor (Par. 1007)
14 = Condensate collection siphon with sediment decanter
15 = Air/gas mixer
16 = Gas valve
17 = Safety valve
18 = ----------
19 = Pump
20 = Check valve
21 = Domestic hot water ow rate gauge
22 = ----------
23 = Recirculation
25 = Gas cock
26 = Gas inlet
27 = Domestic cold water inlet
28 = Collector for condensate drain and safety valve
29 = Domestic hot water outlet
30 = DHW temperature sensor (Par. 1002)
31 = Primary heat exchanger temperature fuse
4 - OPERATION
Figure 4-1 – AGUADENS Hydraulic layout
Figure 4-2 – Example of a partially protected place
Figure 4-2 key – Distances “A” and “B” must
be assessed during installation so that rain
does not reach the appliance directly.

13 AGUADENS
COSMOGAS
4 - OPERATION
4.1 - Operation and intended
use of the appliance
This product is a condensing gas appliance, intended for
the production of domestic hot water for civil use.
Consider the head losses shown in Figure 4-3.
The temperature of the domestic hot water is adjusted
following the procedure in Section 7.3.
This appliance must be connected to a domestic hot
water distribution network, compatible with the features,
performance and power of the appliance itself.
Before installation, carefully wash out the domestic
hot water system to remove any possible residues or
impurities that might compromise operation of the boiler.
Figure 4-3 – Domestic hot water head losses curve
Head losses (bar)
Water ow rate (l/min)
This appliance is not designed to be exposed to
temperatures below zero and above 50°C. Choose a
place that is sheltered from the weather and from frost;
it can be installed outside, in a place partially protected
from rain, snow and hail, such as a balcony or porch (see
Figure 4-2).
This appliance must be installed in a place where
water leakages from the appliance itself, from the joints
between the pipes or from any drainage from the safety
valve, cannot cause damage to materials or items below
it.
Check Figure 5-1 concerning the minimum safety
distances for installation and future maintenance.
Key for Figure 4-3
A = Aguadens 16
B = Aguadens 22
C = Aguadens 37

14
AGUADENS COSMOGAS
4 - OPERATION
4.2 - Examples of installation
In Figures 4-4, 4-5, 4-6, 4-7, 4-8 and 4-9 you can see some
examples of correct installation while in Figure 4-10 you can
see an example of incorrect installation.
Figure 4-4 - Example of system without
recirculation
Figure 4-7 - Example of system with storage tank
(Section 5.14)
Figure 4-5 - Example of system with recirculation
and external pump (see Section 5.12)
Figure 4-6 - Example of system with recirculation
and internal pump (see Section 5.13)
TIMER
TIMER

15 AGUADENS
COSMOGAS
4 - OPERATION
Figure 4-8 - Example of system with solar panels and storage tank (Section 5.14)
Figure 4-9 - Example of system with solar panel
with natural circulation (maximum temperature of
the hot water heater water is 85°C).
Figure 4-10 - Example of incorrect installation

16
AGUADENS COSMOGAS
5.1 - Opening the package
The boiler is supplied in a cardboard package. To open it,
follow the instructions given on the package’s closing aps.
5.2 - Dimensions and minimum
distances to be observed
For both installation and maintenance, it is necessary to leave
free spaces around the boiler, as shown in gure 5-1.
5.3 - Choosing where to
install the appliance
WARNING! The appliance must be installed
exclusively on a solid, vertical wall, which can bear the
weight.
The appliance must be installed inside your home, or
otherwise protected from atmospheric agents such as rain,
wind, sun, and especially frost.
Choose the room and suitable position for installation,
taking into account the following factors:
- connection of the ue gas exhaust/air intake pipes;
- connection of the gas supply pipe;
- connection of the water supply;
- connection of domestic hot water system;
- electric connection;
- connection of the drain for the condensate produced by
the boiler and of the safety valve drain.
5.4 - Unit assembly
Refer to Figure 5-4:
1.- Put the paper template, provided with the appliance,
against the wall (not provided with AGUADENS 37);
2.- Check that the template is square (for AGUADENS 37
check measurements in Figure 5-3);
3.- Mark the holes for the plugs and hydraulic ttings on the
wall;
4.- Remove the paper template (where present);
5.- Make holes “A” and insert the wall plugs “B”;
6.- Make the boiler hydraulic and gas connections;
7.- Hang the boiler on the plugs “C”;
8.- Make the hydraulic connections.
5.5 - Domestic hot and cold water
WARNING! If the hardness of the water is higher
than 20°F (200 mg/l), a water softener must be installed
on the cold water inlet.
WARNING! If the hot water heater has to work
at temperatures above 60°C, the hardness of the water
must be less than 15°F (150 mg/l).
WARNING! The water must not be softened
to values lower than 5°F (50 mg/l). At these values it
becomes acidic and can corrode parts of the hot water
heater, shortening its life.
WARNING! Install a lter with mesh no wider
than 0.5 mm² in the domestic cold water inlet.
1 - Recirculation 3/4”
2 - DHW outlet 1”
3 - 3/4" gas inlet
4 - 3/4" cold water inlet
5 - Flue gas exhaust / Air intake
6 - Support attachments
7 - Ø20 condensate drain
5 - INSTALLATION
Figure 5-1 - Minimum safety distances for
installation and future maintenance
Figure 5-2 – Dimensions and attachments centre-
to-centre distances. Models 16 and 22

17 AGUADENS
COSMOGAS
5 - INSTALLATION
WARNING! The domestic hot water circuit must
be made with materials resistant to temperatures of
at least 95°C and a pressure of 10 bar. Otherwise (e.g.
with plastic piping), the system must be tted with the
relevant protection and safety devices.
In Figures 5-2 and 5-3, you can verify the position of the
domestic hot and cold water ttings.
Insert a closing cock before the cold water inlet, useful for
maintenance work.
5.6 - Gas
WARNING! Do not power the appliance with
gases other than those specied.
WARNING! Check that the gas and supply
pressure are those for which the boiler has been
adjusted.
Two situations are possible:
A - the gas and supply pressure correspond to the
adjustment of the boiler. In this case, it can be
connected;
B - the gas and supply pressure do not correspond to the
adjustment of the boiler. In this case, the boiler must
be converted to the type of gas and supply pressure
corresponding to those of the supply available.
The boiler is provided with the relevant gas conversion kit.
Before installation, clean the inside of the gas supply
pipe thoroughly.
a shut-o󰀨 cock must be installed on the gas supply pipe
near to the appliance.
WARNING! Before supplying gas to the
appliance, carry out a test of the gas system seal, as
required by the technical standards in force.
To prevent damage to the appliance gas control unit, run
a leak test at a pressure not exceeding 50 mbar.
If the gas system must be inspected at pressures over
50 mbar, turn the cock located immediately before the
boiler, to isolate it from the system.
Use Figures 5-2 and 5-3 to check the position of the
appliance gas tting. The cross-sections of the pipes in the
gas supply system must always guarantee a gas supply
that is su󰀩cient to cover the maximum demand.
Figure 5-4 – Support plugs
1 - Recirculation 3/4”
2 - DHW outlet 1”
3 - 3/4" gas inlet
4 - 1" cold water inlet
5 - Flue gas exhaust / Air intake
6 - Support attachments
7 - Condensate drain
Figure 5-3 – Dimensions and attachments centre-
to-centre distances Model 37

18
AGUADENS COSMOGAS
5 - INSTALLATION
5.7 - Condensate drain
There is a siphon inside the boiler for the evacuation of
condensate (see Figures 3-2 and 3-4, detail “40”) and to
prevent combustion products from escaping. The end of
the siphon corresponds to pipe “F” in Figure 5-5. This end
must be conveyed into another, anti-odour siphon (Figure
5-8, detail “G”) to prevent bad odours returning into the
environment (anti-odour siphon “G” is supplied on request).
In particular, the condensate drain system must:
Be for rooms used for residential purposes and for
o󰀩ces with more than 10 users; it can be connected
to the domestic waste disposal plant by means
of appropriate siphon with disjunction, capable of
preventing the pressurisation of the system (the siphon
is inside the boiler) and the return of bad odours from
the sewers (detail “G” in Figure 5-8). If the room used
for o󰀩ce purposes has fewer than 10 users, before
connecting up the domestic waste drain, install a
condensate neutraliser (see Section 9 for the acidity
value of the condensate and the quantities).
Be performed with a pipe with an internal diameter equal
to or greater than 13 mm.
Be installed in such a way as to prevent the liquid
from freezing; therefore pay attention to any external
Sections. It is prohibited to drain into gutters or rainwater
drainpipes.
Slope continuously towards the drain point; avoid high
points, which could pressurise the pipe.
5.8 - Safety valve
The appliance is protected against overpressures by a
safety valve calibrated to 10 bar (see Figures 3-1 and 3-4
detail “28”).
The safety valve drain must be conveyed to pipe “F” in
Figure 5-5, which must then be taken to the anti-odour
siphon (detail “G”, Figure 5-8). This drain with a siphon is
used to prevent overpressures if the valve is opened, and it
allows the user to check possible intervention.
The anti-odour siphon “G” in Figure 5-8 is provided on
request.
WARNING! If the safety valve is not connected
to the drain, whenever the valve intervenes, it could
cause damage to persons, animals or objects.
Figure 5-5 – Condensate drain pipe
F
020002.01.017

19 AGUADENS
COSMOGAS
Figure 5-6 – Water and gas connections
AGUADENS 16 and 22
5 - INSTALLATION
EF
BCD
GEF
BCD
G
020003.01.056
Figure 5-8 - F = Condensate drain pipe
G = anti-odour syphon (on request)
F
G
020002.01.028
min10 mm
max 30 mm
5.9 - Hydraulic and gas connections,
and mounting of the lower cover
The accessories, in some models, could be not supplied
with the appliance.
Models 16 and 22 are shown in Figure 5-6:
B = domestic hot water Ø 22;
C = 3/4" gas inlet cock (EN 331 type-approved);
D = 3/4" domestic cold water inlet cock;
E = gas Ø 18;
F = domestic cold water Ø 18;
Once the hydraulic and gas connections have been made,
proceed with assembly of the lower cover “G” as shown in
Figure 5-6.
Model 37 is shown in Figure 5-7:
M = domestic hot water Ø 22;
N = domestic cold water Ø 22;
5.10 - Polyphosphate
softener (on request)
If the boiler is installed in a geographical area where domestic
hot water is of a hardness exceeding 20°F (200 mg/l), a
polyphosphate softener must be installed on the cold water
supply, in order to safeguard the appliance against limescale
deposits.
Figure 5-7 – Water and gas connections
AGUADENS 37 (Cocks not provided)
M
N
M
N
020008.01.018
Figure 5-9 - Example of typical full installation
Key to Figure 5-9:
2 = Gas cock (EN 331 type approved) (responsibility of
installer)
3 = Water inlet cock / Flow rate selector switch
(responsibility of installer)
4 = Drain valve (responsibility of installer)
5 = Condensate drain (responsibility of installer)
6 = Gas inlet
7 = Cold water inlet
8 = Domestic hot water
9 = Condensate drain pipe
10 = Shut-o󰀨 valve (responsibility of installer)
11 = Filter (responsibility of installer)

20
AGUADENS COSMOGAS
5.11 - Electrical connections: details
WARNING! The appliance is only electrically
safe when it has been correctly connected to an
e󰀩cient earth circuit, performed as provided for by the
current safety regulations.
This fundamental safety requirement must be met. If in
doubt, request a thorough check of the electrical system by
a professionally qualied technician.
Have a professionally qualied technician check that
the electrical system is suitable for the electric power
required by the appliance, as indicated on the plate.
The appliance must be connected to the mains electricity
with a movable plug connection. The use of adapters,
multiplugs, extension leads, etc. is not permitted.
The appliance must be connected to the mains electricity
using a three-pole electric cable, with double insulation,
a minimum section of 1.5 mm² and resistance to a
minimum temperature of 70°C (characteristic T).
For connection to mains electricity, a two-pole switch
must be installed near the appliance with a contact
opening distance of at least 3 mm, as envisioned by the
current sector regulations.
Respect the polarity between the neutral and phase
wires when connecting the appliance.
Make sure that the system pipes are not used as
earthing points for the electrical system or telephone
lines. This piping is not suitable for this purpose; serious
corrosion damage would occur in a very short time to the
appliance, piping and radiators.
WARNING! The boiler is not protected against
the e󰀨ects caused by lightening.
D
C
C
C
B
A
020003.01.009
5 - INSTALLATION
Figure 5-10 – Electrical connections
Figure 5-10 key
A = Control panel box;
B = Electrical connections board cover;
C = Connections cover closing aps;
D = Electrical connections board;
Electrical contacts key
AL Slave = Not used
CH = Not used
AD = Not used
TA = Remote timer control CR04 (where present)
SE = Not used
SB = Storage tank probe (where present)
MF = Alarm output
EP = Boiler pump (where present);
DN = Not used
(2 = Neutral; 3 = Line)
L1 = Boiler power supply line
N = Boiler power supply neutral
EARTH SYMBOL = Earth contacts
020002.01.010
62408190
AL
Slave CH
21 20 19 18 17 16 15 14 13 12 11 10 9 8 6 5 4 3 2 17
AD TA SE0-10 SB MF EP D N C
L1 N