COSMOGAS MYDENS Installation, Use And Maintenance Manual

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62403580 - R00 17-12-2013_IT

INSTALLATION, USE AND MAINTENANCE MANUAL

MYDENS

GAS WALL-MOUNTED CONDENSING BOILER

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MYDENS

COSMOGAS

INDEX

1 - GENERAL SAFETY RECOMMENDATIONS ..................................................................................................4

1.1 - National installation laws .......................................................................................................................................... 4

2 - GENERAL INFORMATION .............................................................................................................................5

2.1 - Presentation ............................................................................................................................................................. 5

2.2 - Overview of the models ............................................................................................................................................ 5

2.3 - Manufacturer ............................................................................................................................................................ 5

2.4 - Key for the symbols used ......................................................................................................................................... 5

2.5 - Maintenance ............................................................................................................................................................. 5

2.6 - Warranty ................................................................................................................................................................... 5

3 - MAIN COMPONENTS .....................................................................................................................................6

4 - OPERATION ...................................................................................................................................................8

4.1 - Operation and intended use of the appliance ........................................................................................................ 10

4.2 - Characteristic curves of the residual head at the central heating plant ...................................................................11

4.3 - Characteristic curve of the domestic hot water head losses .................................................................................. 13

5 - INSTALLATION .............................................................................................................................................14

5.1 - Opening the packaging .......................................................................................................................................... 14

5.2 - Dimensions and minimum safety distances ........................................................................................................... 14

5.3 - Choosing the place of installation .......................................................................................................................... 14

5.4 - Supply and return ................................................................................................................................................... 14

5.5 - Low temperature plants (or on the oor) ................................................................................................................ 15

5.6 - Domestic hot and cold water .................................................................................................................................. 15

5.7 - Gas ......................................................................................................................................................................... 15

5.8 - Mounting the appliance .......................................................................................................................................... 16

5.9 - Condensate drain ................................................................................................................................................... 16

5.10 - Safety valve .......................................................................................................................................................... 16

5.11 - Hydraulic and gas connections and mounting of the lower cover ........................................................................ 17

5.12 - Hydraulic connection for MYDENS -- B boiler ...................................................................................................... 18

5.13 - Polyphosphates softener (on request) ................................................................................................................. 18

5.14 - Electric connections: generalities ......................................................................................................................... 19

5.14.1 - Power supply cable connection .............................................................................................................. 20

5.14.2 - Choosing the room thermostat/chronothermostat ................................................................................... 20

5.14.3 - Connecting the room thermostat/chronothermostat ................................................................................ 20

5.14.4 - Installing the external temperature sensor (on request) ......................................................................... 21

5.15 - Connecting the boiler to indirect water heater with coil ........................................................................................ 22

5.15.1 - Anti- legionella ......................................................................................................................................... 22

5.16 - Burned gas exhaust and combustion agent air intake pipe ................................................................................. 23

5.16.1 - Type of intake/exhaust B23 ..................................................................................................................... 24

5.16.2 - “Split 80/80PP” System (polypropylene) (Type C43; C53; C83) ............................................................. 25

5.16.3 - “Split 80/80PP” System (Type C43; C53; C83): accessories available ................................................... 26

5.16.4 - “Split 80/80PP” System (Type C43; C53; C83): installation examples ................................................... 27

5.16.5 - “60/100PP vertical coaxial” System (polypropylene) (C13; C33) ............................................................ 28

5.16.6 - “60/100PP horizontal coaxial” System (polypropylene) (C13; C33) ........................................................ 29

5.16.7 - “60/100PP Coaxial” System: accessories available ............................................................................... 30

5.16.8 - “60/100PP Coaxial” System: installation examples ............................................................................... 31

6 - OPERATING .................................................................................................................................................32

6.1 - Operating ............................................................................................................................................................... 32

6.1.1 - User instruction ......................................................................................................................................... 32

6.1.2 - Filling the condensate drain siphon .......................................................................................................... 32

6.1.3 - Filling the central heating plant ................................................................................................................. 32

6.2 - General recommendations regarding the supply of gas ........................................................................................ 33

6.3 - Type of gas for which the appliance is regulated. .................................................................................................. 33

6.4 - Conversion of the appliance from one type of gas to another ................................................................................ 34

6.5 - Ignition .................................................................................................................................................................... 36

6.6 - Controlling the supply gas pressure and any adjustment ...................................................................................... 36

6.7 - Controlling the combustion agent air pressure ....................................................................................................... 37

6.8 - Controlling the level of CO2 and any adjustment ................................................................................................... 38

6.9 - Adjusting the power in central heating mode (Range Rated) ................................................................................. 39

6.10 - Adjusting the domestic hot water ow rate ........................................................................................................... 39

7 - USE ...............................................................................................................................................................40

7.1 - Controlling cock opening ........................................................................................................................................ 40

7.2 - Checking central heating plant pressure ................................................................................................................ 40

7.3 - Generalities ............................................................................................................................................................ 41

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COSMOGAS

INDEX

7.4 - Ignition procedure .................................................................................................................................................. 41

7.5 - “User menu” ........................................................................................................................................................... 41

7.6 - Summer operating mode ........................................................................................................................................ 41

7.7 - Winter operating mode ........................................................................................................................................... 41

7.8 - Adjusting the instantaneous domestic hot water .................................................................................................... 42

7.9 - Central Heating ...................................................................................................................................................... 42

7.10 - Thermostatic adjustment ...................................................................................................................................... 42

7.11 - Climatic adjustment .............................................................................................................................................. 42

7.11.1 - Climatic adjustment: on which plants? .................................................................................................... 42

7.11.2 - Climatic adjustment: precautions during adjustment ............................................................................... 43

7.11.3 - Climatic adjustment: setting the parameters ........................................................................................... 43

7.11.4 - Climatic adjustment: adaptation to different climatic areas ..................................................................... 43

7.11.5 - Climatic adjustment: switching the central heating service on and off .................................................... 43

7.11.6 - Climatic adjustment with room compensation ......................................................................................... 43

7.12 - Timers of the various functions ............................................................................................................................ 45

7.13 - Pumps anti-blocking and diverter valve ............................................................................................................... 45

7.14 - Anti-freeze protection ........................................................................................................................................... 45

7.15 - Automatic plant lling (on request) ....................................................................................................................... 45

7.16 - Energy Saving ...................................................................................................................................................... 45

7.17 - “User menu” ......................................................................................................................................................... 46

7.18 - “Installer menu” .................................................................................................................................................... 47

7.19 - Diagnostics ........................................................................................................................................................... 49

7.19.1 - Diagnostics: blocks “Loc” ........................................................................................................................ 50

7.19.2 - Diagnostics: errors “E” ............................................................................................................................ 52

7.19.3 - Diagnostics: alarms “AttE” ...................................................................................................................... 53

8 - MAINTENANCE ............................................................................................................................................54

8.1 - General recommendations ..................................................................................................................................... 54

8.2 - Removing the casing and access to internal components ..................................................................................... 55

8.3 - Removing the burner fan unit ................................................................................................................................. 56

8.4 - Cleaning the burner and the fumes side primary heat exchanger ......................................................................... 56

8.5 - Correct positioning of the ignition and ionising electrodes ..................................................................................... 57

8.6 - Controlling the expansion tank ............................................................................................................................... 57

8.7 - Cleaning the condensate conveyor siphon ............................................................................................................ 58

8.8 - Removing the air vent valve ................................................................................................................................... 59

8.9 - Replacing the pump motor ..................................................................................................................................... 59

8.10 - Removing the central heating circuit pressure sensor ......................................................................................... 59

8.11 - Removing the diverter valve servo-motor ............................................................................................................. 60

8.12 - Removing the diverter valve ................................................................................................................................. 60

8.13 - Removing the ow meter ..................................................................................................................................... 60

8.14 - Removing the safety valve ................................................................................................................................... 61

8.15 - Secondary heat exchanger for the production of d.h.w. ....................................................................................... 61

8.16 - Emptying the appliance on the domestic hot water side ...................................................................................... 62

8.17 - Emptying the appliance on the domestic hot water side ...................................................................................... 62

8.18 - Fan ....................................................................................................................................................................... 62

8.19 - Minimum and maximum power ............................................................................................................................ 62

8.20 - Checking the ionisation current ............................................................................................................................ 63

8.21 - Checking combustion efciency ........................................................................................................................... 63

8.22 - Water temperature measurement sensors ........................................................................................................... 63

8.23 - External temperature sensor ................................................................................................................................ 63

8.24 - Operational wiring diagram .................................................................................................................................. 64

8.25 - Multi-wire wiring diagram ..................................................................................................................................... 66

9 - TECHNICAL DATA ........................................................................................................................................68

10 - COMMAND MENU DIAGRAM ....................................................................................................................70

11 - MENU FORCED BY INTERNAL ELECTRIC BRIDGE ................................................................................71

12 - CE DECLARATION OF CONFORMITY ......................................................................................................72

13 - WARRANTY ................................................................................................................................................73

13.1 - General warranty conditions ................................................................................................................................ 73

13.2 - Instructions for lling-in the warranty card ............................................................................................................ 73

13.3 - Limits of the warranty ........................................................................................................................................... 73

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If you smell gas

1. - Close the gas cock.

2. - Ventilate the room.

3. - Do not switch on any electric device, telephone included.

4. - From another room, call a professionally qualified technician immediately 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 off.

2. - Ventilate the room.

3. - Call a professionally qualied technician.

Explosive or highly ammable products

Do not store or use explosive or highly ammable materials

such as paper, solvents, paints, etc... in the same room where the appliance is installed.

Installation, modications

The gas appliance must be installed, calibrated or modied

by professionally qualied staff, in compliance with National

and local Standards, as well as the instruction in this manual.

Incorrect installation or poor maintenance can cause

injury/damage 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 level exceeding 51°C

can cause permanent injury/damage to persons, animals and objects. Children, the elderly and disabled must be protected against the potential risks of scalding, by introducing devices that limit the temperature of use of domestic hot water to utilities.

The parts conducting the fumes 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.

 The user must have maintenance performed on the

appliance by a professionally qualified technician in agreement with national and local Standards and in compliance with that stated in this manual.

We also highlight the convenience of an annual scheduled

maintenance contract with a professionally qualified technician.

Before performing any cleaning or maintenance operation,

disconnect the appliance from the mains power supply and/ or by acting on the cut-off devices.

After having performed any cleaning or maintenance

operation, 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 and sensory conditions or

lack of experience and knowledge, unless they have been given supervision or instruction concerning 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 possible future consultation. If the appliance must 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 optional or kits added successfully must be original

Cosmogas products.

This appliance must be intended only for the use for which

it has been expressly declared: central heating water for closed circuits intended for central heating of rooms for civil and domestic use, production of domestic hot water for civil use.

 Any contractual and extra contractual liability of the

manufacturer is excluded for damage caused by installation errors or errors in use and however due to failure to comply with the instructions given by the manufacturer or by failure to comply with applicable national and/or local laws.

For safety reasons and respect for the environment, the

packaging elements must be disposed of in the relevant separate waste collection centres.

In case of breakdown

In the case of appliance breakdown and/or malfunctioning, deactivate it, do not attempt any repairs. Cont act a professi onally qualifie d t echnician only. If components must be replaced for repair, only use original spare parts. Failure to comply with the above can jeopardise the safety of the appliance.

Professionally qualied technician.

Professionally qualied technician means, a person with specic technical skill in the sector regarding central heating

plants and the production of hot water for sanitary and domestic uses, for civil use, electric plants for the use of combustible gas. This staff must be authorised as envisioned by the law.

Technical drawings

All the drawings in this manual, relating to electrical, hydraulic or gas installation plants, must be deemed purely indicative. All of the safety elements, auxiliary elements such as the diameters of the electric, hydraulic and gas pipes, must always

be checked by a professionally qualied technician to verify

compliance with applicable Standards and Laws.

1.1 - National installation laws

- 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

1 - GENERAL SAFETY RECOMMENDATIONS

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MYDENS

COSMOGAS

2.1 - Presentation

Congratulations! You have purchased one of the best products on the market. Each individual part is proudly designed, realised, tested and assembled within the COSMOGAS establishment, thus guaranteeing the best quality control. This product has been developed thanks to the constant research by COSMOGAS, considered the “top”

regarding respect for the environment, as it lies within class 5 (the least polluting) envisioned by the EN 297 (and EN 483) Technical Standard and has high efciency; 4-star as per European Community Directive 92/42/

EEC. Great importance has also been given to the end of the appliance’s life. All of its components can be easily separated into homogeneous elements and completely re-cycled.

2.2 - Overview of the models

MYDENS XXY

“P” = Boiler for the instantaneous production of D.H.W. and central heating; “B” = Boiler set-up for coupling to a indirect water heater with coil; “C” = Central heating only boiler;

15 = Boiler with maximum heat input of 14 kW 24 = Boiler with maximum heat input of 25 kW 34 = Boiler with maximum heat input of 34.8 kW

Condensing, indoor, pre-mixed, ecological gas boiler.

2.3 - Manufacturer

COSMOGAS srl Via L. da Vinci 16

47014 - Meldola (FC) Italia

Tel. 0543 498383 Fax. 0543 498393 www.cosmogas.com info@cosmogas.com

2.4 - Key for the symbols used

ATTENTION !!!

El ectric s hock haza rd. Failure to c omply wit h t hese recommendations can jeopardise the good working order of the appliance or cause serious damage to persons, animals or objects.

ATTENTION !!!

Failure to comply with these recommendations can jeopardise the good working order of the appliance or cause serious damage to persons, animals or objects.

 Important indication symbol

2.5 - Maintenance

It is recommended to perform regular yearly maintenance of the appliance for the following reasons:

- to maintain a high efciency and manage the domestic hot water plant economically (with low fuel consumption);

- to achieve a high level of safety;

- to maintain the level of environmental compatibility of the

combustion high;

Offer your customer a scheduled maintenance contract.

2.6 - Warranty

see chapter 13.

2 - GENERAL INFORMATION

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COSMOGAS

1 - Command and control board 2 - Electric connections board 3 - Electric control board box 4 - Lower cover 5 - Secondary heat exchanger for the domestic hot water 6 - Central heating circuit pressure sensor 7 - Safety valve 8 - Fan 9 - Air/gas manifold

10 - Return tting 11 - Supply tting

12 - Detection electrode 13 - Expansion tank 14 - Support attachments

15 - Conveying tting 16 - Air intake and burned gas exhaust ttings

17 - Combustion analysis points

18 - Double fumes temperature sensor (Par.

1006 and 1014)

19 - Spark generator 20 - Ignition cables 21 - Burner window 22 - Air inlet manifold

23 - Back ue preventer valve

24 - Gas valve 25 - Circulation pump 26 - Pump release screw 27 - Front casing

28 - Domestic hot water ow meter 29 - Domestic hot water ow meter sensor (Par.1061)

30 - Display 31 - Control board 32 - Access to the gas valve adjusters

3 - MAIN COMPONENTS

Figure 3.1 - Boiler internal components

16 18

323130

020002.01.002

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COSMOGAS

33 - Front casing couplings 34 - Titanium plated stainless steel primary heat exchanger

35 - Double supply temperature sensor (Par. 1001 and

1005)

36 - Return temperature sensor (Par. 1007) 37 - Supply hydraulic unit 38 - By-pass pipe 39 - Central heating circuit drain cock 40 - Central heating circuit drain cock

41 - Domestic hot water temperature sensor (Par. 1002)

42 - Plant ll cock

43 - Condensate collection tank 44 - Safety valve drain pipe 45 - Return hydraulic unit 46 - Air vent valve 47 - 3-way diverter valve 48 - Air vent valve drain pipe 49 - Condensate drain siphon 50 - Air/gas mixing unit 51 - Burner 52 - Drain pipe for any water coming from the combustion agent air pipe 53 - Left ignition electrode 54 - Right ignition electrode

3 - MAIN COMPONENTS

Figure 3.1 - Boiler internal components

4038

020002.01.003

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MYDENS

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4 - OPERATION

Figure 4.1 - Hydraulic layout

MYDENS 24P MYDENS 34P

Figure 4.2 - Hydraulic layout

MYDENS 15B MYDENS 24B MYDENS 34B

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MYDENS

COSMOGAS

Key for gures 4.1, 4.2, 4.3:

1 = Boiler 2 = Combustion agent air inlet 3 = Fumes outlet

4 = Fumes temperature sensor (Par. 1006) 5 = Sealed chamber

6 = Fumes temperature safety sensor (Par. 1014) 7 = Water collection pipe coming from the combustion agent inlet pipe 8 = Expansion Tank

9 = Supply temperature sensor (Par. 1001) 10 = Supply temperature safety sensor (Par. 1005)

11 = Burner 12 = Titanium plated stainless steel VRC type heat exchanger 13 = Fan

14 = Return temperature sensor (Par. 1007) 15 = Condensate collection siphon with sediment decanter 16 = Air/gas mixer 17 = Pneumatic gas valve 18 = Safety valve 19 = Central heating circuit pressure sensor 20 = Circulation pump 21 = Air vent valve 22 = Diverter valve 23 = Plate heat exchanger for domestic hot water

24 = Domestic hot water sensor (Par. 1002) 25 = Central heating by-pass valve

26 = Domestic hot water ow meter 27 = Domestic hot water lter

28 = Supply circuit drain cock 29 = Return circuit drain cock

30 = Central heating plant ll cock

31 = Central heating circuit supply 32 = Domestic hot water outlet 33 = Gas inlet 34 = Domestic cold water inlet 35 = Central heating circuit return 36 = Condensate drain collector and of the safety valve 37 = Central heating plant 38 = Domestic hot water plant

39 = Water supply attachment for lling plant

40 = Supply to indirect water heater 41 = Return from indirect water heater 42 = Expansion tank for indirect water heater 43 = Hydraulic safety unit 44 = Cold water supply 45 = Safety valve 46 = Cold water 47 = Domestic hot water 48 = Indirect water heater

49 = Indirect water heater temperature sensor (Par. 1002)

Figure 4.3 - Hydraulic layout

MYDENS 15C MYDENS 24C MYDENS 34C

4 - OPERATION

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MYDENS

COSMOGAS

4.1 - Operation and intended use of the appliance

This product is a condensing, gas appliance, intended for the production of central heating and domestic hot water for civil use. Make the adaptation between boiler and plant, selecting the characteristic residual head curve deemed most suitable

from those available (see g. 4.4 and 4.5).

The max. useful power is always guaranteed at the production of domestic hot water as the central heating service switches off at every request for domestic hot water. The temperature of the domestic hot water is adjusted following the relevant procedure in chapter 7.8. The following types of plants can be realised depending on the model:

A) - MYDENS -- “P”. With this boiler it is possible to realise

a plant for the production of instantaneous domestic hot water and a central heating plant with the heating elements operating at a temperature between 30°C and 80°C. An

example of this type of plant is given in g. 4.1.

B) - MYDENS -- “B”. With this boiler it is possible to realise

a plant for the production of domestic hot water via a coiltype storage indirect water heater and a central heating plant with the heating elements operating at a temperature between 30°C and 80°C. An example of this type of plant is

given in g. 4.2.

C) - MYDENS -- “C”. With this boiler it is possible to realise

a plant for central heating only with the heating elements operating at a temperature between 30°C and 80°C. An

example of this type of plant is given in g. 4.3.

This model can be connected to a indirect water heater

with coil also after installation, lled via a diverter valve or a

pump outside the boiler.

In all of the boiler versions previously described, the connection of the domestic hot water service is not

indispensable; if the boiler is used for central heating only, just connect the cold water pipe to ll the central heating plant and close the d.h.w. outlet tting.

All boiler versions previously described, can be connected to a room thermostat for adjustment of the central heating. To perfect the quality of the heating service, an external

temperature sensor can be connected (climatic adjustment)

to automatically adjust the supply temperature depending on the external temperature. In this case, the room temperature can perform an ON /OFF type of compensation of the room temperature or in two steps. For further information regarding climatic adjustment, refer to chapter 7.11.

This appliance must be attached to a central heating

plant and eventually to a domestic hot water distribution network, compatible with the features, performance and powers of the appliance itself.

Before installation the central heating plant and the

domestic hot water plant must be washed thoroughly in order to remove any residues or impurities, which could compromise the good working order of the boiler.

This appliance is not envisioned for installation outdoors.

It must not be exposed to temperatures below zero and temperatures above 50°C. Selected a place sheltered from atmospheric agents and freezing.

This appliance must be installed in a location where any

loss of water from the same, the connections between the pipes or from the safety valve drain, cannot cause damage to materials or objects below.

Check gure 5.1 concerning the minimum safety

distances for installation and future maintenance.

4 - OPERATION

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MYDENS

COSMOGAS

4.2 - Characteristic curves of the residual head at the central heating plant

The residual head at the attachments of the MYDENS

boiler with standard pump is given as a graph in gures 4.4

and 4.5.

If the head is not sufcient, it is possible to request a 7

metre upgraded pump. In this case, the residual head can

be veried on the graphics in gures 4.6 and 4.7.

4 - OPERATION

Figure 4.4 - Residual head for MYDENS 24 with 6 metre pump (standard)

Figure 4.5 - Residual head for MYDENS 34 with 6 metre pump (standard)

You can request a modulating pump. In this case the

modulation range (particularly “x”) is veriable on the graph of gure 4.8.

ATTENTION !!! For MYDENS - “P” models it is prohibited to use the selector switch on the pump to modify its speed, as the domestic hot water production

efciency deteriorate.

100

150

200

250

300

350

400

450

500

0 200 400 600 800 1000 1200

1400

Q (l/h)

H (mbar)

RIC16-2012_b

100

150

200

250

300

350

400

450

500

0 200 400 600 800 1000 1200

1400

Q (l/h)

H (mbar)

RIC16-2012_a

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4 - OPERATION

Figure 4.6 - Residual head for MYDENS 24 with 7 metre pump (on request)

Figure 4.7 - Residual head for MYDENS 34 with 7 metre pump (on request)

RIC20-2012_b

100

150

200

250

300

350

400

450

500

550

0 200 400 600 800 1000 1200 1

400

Q (l/h)

H (mbar)

RIC20-2012_a

100

150

200

250

300

350

400

450

500

550

0 200 400 600 800 1000 1200

1400

Q (l/h)

H (mbar)

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COSMOGAS

Figure 4.9 - Domestic hot water losses curve

0,5

1,5

2,5

0 3,3 6,6 10 13,3 16,6

RIC17 - 2012

Head losses (bar)

Water ow rate (l/min)

4 - OPERATION

4.3 - Characteristic curve of the domestic hot water head losses

Each boiler offers certain resistance on the passage of

the domestic hot water (see ow rate/pressure graphics in gure 4.9). The installer or design technician must take this into consideration in order to guarantee the correct ow rate

of domestic hot water to the utility.

Figure 4.8 - Residual head for MYDENS with modulating pump (on request)

100

150

200

250

300

350

400

450

500

550

600

650

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300

RIC27-2013

H (mbar)

Q (l/h)

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5.1 - Opening the packaging

The appliance is supplied in cardboard packaging. Open

following the instructions given on the aps of the packaging

itself.

5.2 - Dimensions and minimum safety distances

It is necessary to leave free spaces around the boiler as

illustrated in gure 5.1 both for installation and maintenance.

5.3 - Choosing the place of installation

ATTENTION !!! The appliance must be installed exclusively on a solid, vertical wall, which can support the weight.

The appliance must be installed within the home, or otherwise protected from atmospheric agents such as rain, wind, sun, and especially freezing.

Dene the room and suitable position for installation, taking

into account the following factors:

- connection of the fumes exhaust/air intake pipes;

- connection of the gas supply pipe;

- connection to the water supply;

- attachment of the central heating plant;

- attachment of the domestic hot water plant;

- electric connection;

- connection to the drain for the condensate produced by

the boiler;

- electric connection of the room thermostat;

- eventual connection of the safety valve drain;

- eventual attachment of the external temperature sensor;

5.4 - Supply and return

ATTENTION !!! This boiler has a safety valve calibrated at 3 bar. A water head over 30 m must therefore not be installed.

ATTENTION !!! COSMOGAS is not liable for any damage caused by incorrect use of additives in the central heating plant.

ATTENTION !!! The plant downstream from the appliance must be made with materials that resist temperatures up to 95°C and pressure of 3 bar.

Differently (e.g. plastic piping) the plant must be tted

with the relevant protection and safety devices.

Before connecting the central heating pipes, wash the plant thoroughly to eliminate any waste (hemp, radiators casting

sand, etc..), which could damage the appliance. This

washing operation must also be performed if the appliance is replaced. Figure 5.2 shows the positioning of the supply and return

ttings.

Install a metal mesh lter on the return pipe in order to stop

any plant residues before the return into the boiler.

Do not use the appliance for the introduction of any type

of additive into the plant.

1 - Central heating supply 3/4” in the 15 and 24 models 1” in the 34 model

2 - 1/2” D.H.W. outlet (absent in “B” and “C” models) 3 - 3/4” indirect water heater return (present in “B” models only)

4 - 3/4” gas inlet 5 - 1/2” cold water inlet 6 - Central heating return 3/4” in the 15 and 24 models 1” in the 34 model 7 - Fumes exhaust 8 - Support attachments 9 - Ø20 condensate drain

5 - INSTALLATION

Figure 5.1 - Minimum safety distances

Figure 5.2 - Boiler dimensions and attachments centre to centre distances

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MYDENS

COSMOGAS

5 - INSTALLATION



A continuous intake of water into the central heating circuit increases the content of oxygen and lime scale with a risk of corrosion inside the heat exchanger body, with consequent reduction of the boiler’s lifespan. Any leaks from the central heating circuit must be repaired to prevent the problem.

5.5 - Low temperature

plants (or on the oor)

ATTENTION !!! The plant downstream from

the appliance must be made with materials that resist temperatures up to 95°C and pressure of 3 bar.

Differently (e.g. plastic piping) the plant must be tted

with the relevant protection and safety devices.

ATTENTION !!! when installing the boiler in

a low temperature plant, it is indispensable to set

the parameter

3015 at the value of 45°C and the

parameter 3016 at the value of 20°C (see chapter 11).

With this setting, the boiler will adjust the supply to a temperature between 20°C and 45°C. No adjustment from

the command panel (also via climatic adjustment), can

supply water at a temperature over 45°C.

ATTENTION !!! If the boiler is installed in a

oor-standing plant made with plastic piping, all of the

precautions must be taken against corrosion due to oxygen in the water:

make sure that the plant is made with plastic pipes with permeability to oxygen not exceeding 0.1 g/m3 at 40°C. Whenever the pipe should not meet these features, the radiant panel circuit from the boiler must be isolated, via a plate heat exchanger suitable to resist the corrosion generated by the oxygen dissolved in the water.

5.6 - Domestic hot and cold water

ATTENTION !!! If water hardness exceeds 25°F, we recommend the installation of a polyphosphates softener (see chapter 5.13).

ATTENTION !!! Install a lter with mesh no wider than 0.5 mm² in the domestic cold water inlet.

ATTENTION !!! The domestic hot water circuit must be realised with materials resistant to a temperature of at least 95°C and pressure of 10 bar.

Differently (e.g. plastic piping) the plant must be tted

with the relevant protection and safety devices.

In gure 5.2 it is possible to verify positioning of the domestic hot and cold water ttings.

Envision a closing cock upstream from the cold water inlet, useful for maintenance works. The connection of the domestic hot water service is not

indispensable; if the boiler is used for central heating only, just connect the cold water pipe to ll the central heating

plant and close the d.h.w. outlet.

5.7 - Gas

ATTENTION !!! It is prohibited to power the

appliance with gases different to that envisioned.

ATTENTION !!! 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 it is advised to clean the inside of the

gas supply pipe thoroughly;

A cut-off cock must always be installed on the gas

supply pipe;

To prevent damage to the appliance gas control unit, the

leak test at a pressure not exceeding 50 mbar;

If the gas plant must be inspected at pressures over

50 mbar, operate on the cock positioned immediately upstream from the boiler, to isolate the same from the plant.

Figure 5.2 veries the positioning of the appliance gas tting. The sections of the pipes making up the gas supply plant must always guarantee a gas supply sufcient to

cover the maximum requested.

Page 16

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Figure 5.3 - Support plugs

Figure 5.4 - Safety valve drain and condensate drain connection

020002.01.005

020002.01.006

5 - INSTALLATION

5.8 - Mounting the appliance

Refer to gure 5.3:

1.- place the paper template, provided with the appliance,

against the wall;

2.- check that the template is square to the environment;

3.- mark the holes for the plugs and hydraulic ttings on the wall;

4.- remove the paper template;

5.- make the holes “A” and introduce the wall plugs “B”;

6.- make the boiler hydraulic and gas connections;

7.- hang the boiler on the plugs “C”;

8.- make the hydraulic ttings.

5.9 - Condensate drain

There is a siphon inside the boiler for the evacuation of

condensate (see gure 3.1 detail “49”) and to prevent

combustion products from escaping, whose end

corresponds to the pipe “B” in gure 5.4. This termination must be conveyed into an anti-odour siphon (gure

5.7 detail “G”) to prevent bad odours returning into the

environment (the anti-odour siphon “G” is supplied on

request). Open the tank “A” as indicated in gure 5.4 and x it using

the screw “D”, connect the drain pipe “F” as indicated in

gure 5.5.

In particular, the condensate drain plant must be:

for room used for residential purposes and for ofce 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 (siphon prepared within boiler) and to prevent

the return of bad odours from the sewer (detail “G” in

gure 5.7). If the room used for ofce purposes has

less than 10 users, before connection with the domestic waste drain, a condensate neutraliser is good practice (see chapter 9 for the value of acidity of the condensate

and the quantities).

be performed with a pipe with internal diameter equal to

or greater than 13 mm;

be installed in a way to prevent the liquid from freezing;

therefore pay attention to any external passings. It is

prohibited to drain into gutters or drainpipes;

to slope continuously towards the drain point, avoid high

points, which could pressurise the pipe;

5.10 - Safety valve

The appliance is protected against overpressures by a

safety valve calibrated to 3 bar (see gure 3.1 detail “7”). The safety valve drain (detail “C” in gure 5.4), along with the condensate drain (detail “B” in gure 5.4) must be conveyed to a pipe “F” (see gure 5.5) with minimum internal diameter of 13 mm; the pipe “F” must be then taken to the anti-odour siphon (detail “G” gure 5.7). This drain

with siphon is used to prevent overpressures if the valve is opened and makes it possible for the user to check the eventual intervention.

The pipe “F” in gure 5.5 is supplied as per standard along with tank “A” in gure 5.4. The anti-odour siphon “G” in gure 5.7 is provided on request.

ATTENTION !!! If not connected to the drain,

whenever the safety valve should intervene, it could cause damage to persons, animals or objects.

Page 17

MYDENS

COSMOGAS

Figure 5.6 - Water and gas connections

Figure 5.5 - Condensate drain pipe

5 - INSTALLATION

020002.01.017

EBA F

C DH

020002.01.004

Figure 5.7 - Siphon funnel (on request)

020002.01.028

min10 mm max 30 mm

5.11 - Hydraulic and gas connections

and mounting of the lower cover

The boiler is provided with the ttings illustrated in gure 5.6

as per standard, where:

A = central heating supply Ø 18 in the 15 and 24 models Ø 22 in the 34 model

B = domestic hot water Ø 14 (absent in the “B” and ”C” models) C = 3/4” gas inlet cock (EN 331 type-approved)

D = 1/2“ domestic cold water inlet cock

E = gas Ø 18

F = domestic cold water Ø 14

G = central heating return Ø 18 in the 15 and 24 models Ø 22 in the 34 model

Once the hydraulic and gas connections have been made, proceed with assembly of the lower cover “H” as indicated

in gure 5.6.

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5.12 - Hydraulic connection for MYDENS -- B boiler

The “B” version of the boiler must be connected to a indirect water heater with coil for the production of domestic

hot water (see also chapter 5.15). To do this, ttings have been set-up for connection to the

indirect water heater. Operate as follows to prepare (refer

to gure 5.8):

1.- mount the reducer “A”;

2.- mount the wires “B” and “C”;

Make sure that every coupling has its own gasket introduced

A = reducer tting

B = supply to indirect water heater coil C = return from indirect water heater coil

Figure 5.8 - Hydraulic connections for boiler with indirect water heater with coil

5.13 - Polyphosphates

softener (on request)

If the boiler is installed in a geographical area where

domestic water has hardness exceeding 25°F (250 mg/l), a

polyphosphates softener must be installed on the cold water

supply (see gure 5.9 detail “B”), in order to safeguard the

appliance from any lime scale deposits.

Proceed as follows for installation (refer to gure 5.9):

1.- connect the softener “B” to the cock “A”;

2.- mount the cock “A” to the boiler tting;

3.- proceed with the installation of the cold water inlet pipe

into the tting behind the softener “B”;

4.- before re-mounting the lower cover, it is necessary to

trim (only in the rear part), the entire part between walls

“C” and “D”, from the outer edge to the central slot, to allow the softener “B” to be housed.

Figure 5.9 - Polyphosphates softener (on request)

020002.01.007

020002.01.008

5 - INSTALLATION

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5.14 - Electric connections: generalities

ATTENTION !!! The appliance is only electrically

safe when it has been correctly connected to an

efcient earth circuit, performed as envisioned by the

current Safety Standards.

This fundamental safety requirement must be met. If in doubt, request a thorough control of the electric plant by a

professionally qualied technician.

Have a professionally qualied technician check that the

electric plant is suitable for the electric power required by the appliance, indicated on the plate.

The appliance must be connected to the mains electricity

using a cable coupler. The use of adapters, multiple sockets, extensions, etc. is not allowed.

The appliance must be connected to the mains electricity

using a three-polar electric cable, with double isolation, minimum section of 1.5 mm² and resistant to a minimum

temperature of 70°C characteristic T).

For connection to mains electricity, a bi-polar switch

must be envisioned in the vicinity of the appliance with a contacts opening distance of at least 3 mm, as envisioned by the current regulations on the subject.

Respect the polarity between the neutral phase during

connection of the appliance.

Make sure that the water plant and heating pipes are not

used as earth points for the electric or telephone plant. This piping is not suitable for this purpose, moreover, serious corrosion damage would occur in a very short time, on the appliance, piping and radiators.

ATTENTION !!! the boiler is not protected

against the effects caused by lightening.

020002.01.009

5 - INSTALLATION

Figure 5.10 - Electric connections

Key for gure 5.10

A = Commands board box; B = Electric connections board lid; C = Connections lid closing aps;

D = electric connections board

Key for electric contacts

PM = External modulating pump control (if present) CH = Supply sensor (for boilers in cascade mode)

BUS = Remote control TA = Room thermostat/chronothermostat 0-10 = 0-10 volt signal input

SE = External sensor (if present) SB = Indirect water heater sensor (if present)

MF = Multi-function output

PE = External pump (if present) DNC = External diverter valve (if present) (D = Domestic hot water line; N = Neutral; C = Heating line)

L1 = boiler power supply line N = Boiler power supply neutral EARTH SYMBOL = Earth contacts

020002.01.010

Page 20

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Figure 5.11 - Correct positioning of the room thermostat/chronothermostat

5.14.1 - Power supply cable connection

Proceed as follows to connect the power supply cable (refer

to gure 5.10):

1.- use a three-polar cable with double isolation, with minimum section of 1.5 mm²

2.- remove the casing from the appliance following the

relevant instructions in chapter 8.2;

3.- rotate the panel “A” towards the front of the boiler;

4.- operate on the aps “C” and open the lid “B” as indicated by the arrow;

5.- lay the power supply cable through the fairlead in

proximity of the contacts “L1”, “N” and earth symbol;

6.- strip the cable making sure that the earth wire (yellow/

green) is kept 20 mm longer than the other two;

7.- connect the yellow-green cable to the earth clamp (see

symbol)

8.- connect the brown cable (Phase) to the clamp L1

9.- connect the blue cable (Neutral) to the clamp N

5.14.2 - Choosing the room thermostat/

chronothermostat

The boiler is set-up to operate with any room thermostat or chronothermostat, which has the contact to which the cables coming from the boiler are to be connected, with the following features:

- open/closed (ON/OFF);

- potential-free (not powered);

- closing when there is a request for heat;

- 24Vac, 1A electrical feature.

5.14.3 - Connecting the room thermostat/ chronothermostat

Install the room thermostat in a place in the house where the temperature is the most characteristic of the home and however in an area that is not subjected to repeated temperature changes, away from windows or doors which

open directly to the outside (see gure 5.11).

Proceed as follows to connect the room thermostat cable

(refer to gure 5.10):

1.- use a bi-polar cable with minimum section of 1.5.5mm², which goes from the boiler to the room thermostat/ chronothermostat. The maximum length allowed is 20 metres. For lengths exceeding 100 metres, use a

shielded cable with shield earthing;

2.- remove the casing from the appliance following the

relevant instructions in chapter 8.2;

3.- lay the electric cable through the fairlead in proximity of

the “TA” contacts;

4.- use a free fairlead, not used by other wires;

5.- strip the cable;

6.- connect the two ends of the cable to the “TA” clamps

(see gure 5.10).

ATT ENTI O N !! ! As the room ther most a t/

chronothermostat cables are subjected to very low safety

voltage (25Vdc), they must ow in wires different from the

230 Vac power supplies.

5 - INSTALLATION

Page 21

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5 - INSTALLATION

5.14.4 - Installing the external temperature

sensor (on request)

Install the external temperature sensor outside the building in a wall facing NORTH or NORTH-EAST, at a height of 2 to

2.5 metres from the ground. In buildings with several oors, it

must be installed at about half way up the second oor. Do not

install it above windows, doors or ventilation outlets or directly below balconies or gutters. Do not plaster over the external temperature sensor. Do not install the sensor on walls without eaves, i.e. not protected from rain. Whenever the sensor is installed on a wall that has yet to be plastered, it must be installed with a suitable thickness or be removed before plastering. Proceed as follows to connect the external temperature sensor cable:

1.- lay a bi-polar electric cable with minimum section of

1.5mm², which goes from the boiler to the external temperature sensor. The maximum length allowed is 20 metres. For other lengths up to 100 metres, use a shielded cable with shield earthing.

ATTENTION !!! As the cables are subjected to

very low safety voltage (24Vdc), they must ow in wires

different from the 230 Vac power supplies.

2.- connect the bipolar cable to the “SE” clamps in gure

5.10;

3.- connect the bi-polar cable to the ends of the external temperature sensor.

Set the boiler to learn of the external temperature sensor as

follows (refer to gure 7.1):

1.- press the

and RESET keys simultaneously for 5

seconds and until the symbol

appears on the display

to indicate the entry to the “Installer” menu;

2.- press the

and keys to scroll the parameters

in the “Installer” menu until the parameter

2003 is

displayed;

3.- press the RESET key to enable the modication of the parameter (highlighted by the fact that it starts to ash);

4.- press the

and keys to modify the value of

the parameter, taking it to the value of 1 or 2 on the type

of climatic adjustment desired (see chapter 7.11);

5.- press the RESET key to conrm the modication of the

parameter (highlighted by the fact that the value of the

parameter starts to ash);

6.- press the RESET key for 2 seconds to go back to normal

display;

The enabling of the external sensor is conrmed by the

appearance of the icon

on the display. Proceed with the steps given in chapter 7.11.3 to set the correct adjustment values of the supply temperature depending on the external temperature.

Page 22

MYDENS

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5.15 - Connecting the boiler to indirect water heater with coil

Only the MYDENS -- B model boiler can be connected to a indirect water heater with coil.

The hydraulic connection must be performed as per gure

5.12 (see also chapter 5.12).

Proceed as follows for the electric connection (refer to the

gure 5.10):

1.- disconnect the electric power supply from the boiler;

2.- lay a bi-polar electric able with minimum section of 1.5

mm², which goes from the appliance to the indirect water heater temperature sensor and connect it to the boiler at

clamps “8” and “9” (SB);

3.- connect the other end of the cable to the indirect water

heater temperature sensor;

4.- introduce the temperature sensor inside the indirect water

heater sample point (see gure 5.12 detail “14”).

The MYDENS -- C model boiler can be connected to a indirect water heater with coil also after installation. In this case, a diverter valve must be envisioned outside

the boiler to ll the indirect water heater along with

setting parameter 3012 at the value of 1.

The temperature of the water stored inside the indirect water heater can be selected by the user in a range between 40 and 70°C.

ATTENTION !!! A hot water temperature level

exceeding 51°C can cause permanent injury/damage to persons, animals and objects. Children, the elderly and disabled must be protected against the potential risks of scalding, by introducing devices that limit the temperature of use of domestic hot water to utilities.

5.15.1 - Anti- legionella

If the boiler is connected to a indirect water heater for the preparation of domestic hot water, a disinfection cycle is envisioned against the legionella bacterium. This cycle envisions taking the indirect water heater to a temperature

of 60°C (temperature at which the legionella bacteria dies)

at least every week. It is for this reason that the water (at

certain times) can reach the utilities at a higher temperature

that than set with the relative command.

ATTENTION !!! A hot water temperature level

Figure 5.12 - hydraulic connection to BWR C type indirect water heater or general indirect water heater with coil

1 MYDENS -- B boiler 2 3 4 Gas supply

5 D.H.W. recirculation connection (optional) 6 Connection for lling central heating plant (by the installer)

7 BWR C indirect water heater or general indirect water heater with coil 8 Domestic hot water outlet 9 Cold water inlet

10 Supply and return for indirect water heater lling 11 Hydraulic safety unit (by the installer)

12 Supply to the central heating plant 13 Return from the central heating plant 14 Temperature sensor sample point

5 - INSTALLATION

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5.16 - Burned gas exhaust and combustion agent air intake pipe

ATTENTION !!! To connect the burned gas

exhaust and combustion agent air intake, the relevant national and local regulations must be respected.

ATTENTION !!! The fumes of this appliance can

reach 90°C in determined conditions. Therefore, use pipes in plastic that can resist high temperatures.

ATTENTION !!! This appliance is the

“condensing” type. Use AISI 316 stainless steel materials to make the fumes exhaust. The polypropylene materials to prevent corrosions due to the acidity of the condensate.

Regarding this, remember that appliances of this type must have exhaust and intake pipes supplied by the manufacturer of the appliance itself. Other types of pipes, if used, must be type-approved for this intended use. The types of exhaust for which the appliance is approved are given on the technical features table at the end of the manual under the “type” heading and on the features plate

afxed to the boiler, also under the “type” heading. The symbols used to dene type of exhaust is given below:

- B23, separated with intake in room and exhaust through

wall or roof.

ATTENTION !!! If the appliance is installed with the

B23 type exhaust, it will take in air for combustion from the surrounding environment. Therefore, all precautions must be taken regarding ventilation of the rooms, which are prescribed by the national and/or local Standards.

- C13, coaxial in vertical wall

- C33, coaxial at the roof

- C43, separated with exhaust in ue, combined with intake

in common channel.

ATTENTION !!! The boilers installed in type C43

must only be connected to conventional ues.

- C53, separated with exhaust on roof and intake on wall or

however, in two potentially different pressure points.

- C63, the boiler can be tted to type-approved exhaust and

intake pipes of other brands.

ATTENTION !!! With the C63 type exhaust,

the condensate coming from the chimney cannot be conveyed into the boiler.

- C83, separated with wall intake or another point

independent from the intakes of other appliances and

ue exhaust.

Figure 5.13 - Exhaust/intake systems

5 - INSTALLATION

Page 24

MYDENS

COSMOGAS

During operation, especially in the winter, due to high

efciency, white smoke may escape from the appliance

exhaust. This is solely a natural phenomenon and must not be worried about in any case, because it is the water vapour present in the fumes which in contact with the outside air, condensates.

5.16.1 - Type of intake/exhaust B23

In the case of B23 type combustion agent air/fumes exhaust systems, it is indispensable that the rooms in which the appliances are installed have at least as much air as that required by combustion and ventilation of the room. It is therefore good practice to remember that the combustion of 1 m³ of gas requires 11 cm³ of air. The natural flow of air must take place directly through permanent openings made in the outside walls of the room to

be ventilated; however away from sources of pollution, such

as: vents of dubious origin, airborne industrial exhaust etc.

The ventilation openings must meet the following requirements:

have sections with net passage of at least 6 cm² for

every kW of heat input installed, with minimum of 100

cm²;

be realised in a way that the opening inlets both inside

and outside the wall cannot be blocked;

be protected, for example with grids, metal meshes, etc..

The net section of the passage must not be reduced by

these elements;

ebe situated at a height more or less of the oor

and such not to disturb the correct operation of the combustion products exhaust devices. Where this position is not possible, the section of the ventilation openings must be increased by at least 50%.

The ow of air can also be obtained from an adjacent room

as long as:

it has direct ventilation, in compliance with the previous

points;

in the room to be ventilated, only appliances tted to

exhaust pipes are installed;

the adjacent room is not a bedroom; the adjacent room is not a common part of the building; the adjacent room is not an environment with re hazard,

such as a hangars, garages, combustible materials

warehouse, etc.;

the adjacent room does not have a negative pressure with

respect to the room to be ventilated due to reverse draught (which can be caused by the presence in the room of

another appliance operating with any type of fuel, a replace

and any other intake device for which an adequate air intake

has not been envisioned);

the ow of air from the adjacent room to that to be ventilated

can take place freely through permanent openings with total net section not less than that indicated at the start of this chapter.

In rooms where gas appliances are installed, it may become necessary, as well as the input of combustion agent air, also to evacuate the stale air, with resulting release of an additional equal amount of clean air.

If the stale air is evacuated with the aid of a mechanical tool

(electric fan) the following conditions must be respected: a) if there is a common exhaust pipe in the room, it must be

capped;

b) the ventilation opening of the room in which the gas

appliance is installed must be increased depending on the

maximum air ow rate required at the electric fan.

c) the action of the electric fan must not affect the correct

evacuation of the combustion products. To this end, that

stated above must be veried by draft testing, running the

fan or extractor hood at its maximum power and the gas appliance at the maximum and minimum power.

5 - INSTALLATION

Page 25

MYDENS

COSMOGAS

5.16.2 - “Split 80/80PP” System (polypropylene) (Type C43; C53; C83)

The appliance is supplied as per standard without ttings

for the connection of the fumes exhaust/air intake. To connect the boiler to a “80/80PP Split” system, the relevant

kit must be requested and must be installed as in gure

5.14. Fitting “A” can rotate freely by 360°, guaranteeing optimum installation versatility.

In the fumes exhaust side, it is recommended to install

AISI 316L stainless steel or polypropylene pipes, which are more resistant to the formation of condensate.

Take particular care with the installation of pipes in

the part that passes through the wall to the outside. The normal maintenance operations must always be possible, therefore install the pipes in a sheath so that they can be slid out.

The horizontal tracts must always have an inclination of

at least 2% towards the condensate drain device.

The boiler is already set-up to collect the condensate,

which must be tted to a drain pipe (see chapter 5.9).

ATTENTION !!! This condensate drain is

designed to make all liquid produced ow from a single

appliance. If several boilers are installed, each one must envision its own condensate drain.

The fumes exhaust/air intake system can be extended up to a maximum distance as indicated in chapter 9. Every 90° bend has a loss equivalent to 1 metre of linear pipe. Every 45° bend has a loss equivalent to 0.5 m of linear pipe.

ATTENTION !!! The fumes exhaust terminal

must be appropriately protected against the effects of the wind (see also 7.19.1 error Loc 20).

ATTENTION !!! Mechanically secure the joints

between the various component elements of the

exhaust and intake pipe, through the use of xing systems or equivalent systems. See gure 5.16

ATTENTION !!! The temperature of the exhaust

pipe can reach 90°C during operations. If it must pass through a wall that is sensitive to these temperatures, insert a protective heat-isolation sheath.

ATTENTION !!! If the air intake and fumes

exhaust terminals are positioned in the same wall, they must remain at a minimum distance of 1 metre.

ATTENTION !!! The exhaust and intake pipes

must be appropriately sustained via rigid brackets positioned non more than 1 metre from each other. The

brackets must be xed to rigid walls that can support

the weight of the pipe itself.

Figure 5.16 - Fixing the exhaust and intake pipes

Figure 5.14 - Installation of the “80/80PP Split” System

Figure 5.15 - Clearance

5 - INSTALLATION

020002.01.011

Page 26

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5.16.3 - “Split 80/80PP” System (Type C43; C53; C83): accessories available

To make the “80/80PP split” fumes exhaust/air intake system,

we propose some of the most common accessories available;

remember that a wide range can be consulted in the relevant catalogue: (the number after the code is used to recall the

piece in the following drawings)

62617306 - N° 10 PP coaxial roof terminal 62617244 - N° 12 90° bend M/F PP 62617255 - N° 29 converts for pitched roofs from 15° up to 25° 62617236 - N° 11 extension M/F PP 62617249 - N°18 anti-slip bands for extensions PP

62617240 - N° 14 exible hose M.F. PP L=20m 62617241 - N°16 spacer for exible hose

62617238 - N° 17 telescopic joint PP

62617242 - N° 15 T-tting PP

62617246 - N° 13 45° bend M/F PP

COD. 62617306

5 - INSTALLATION

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MYDENS

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5.16.4 - “Split 80/80PP” System (Type C43; C53; C83): installation examples

In gure 5.17 two examples of installation are given:

- exhaust into chimney with collection of condensate inside

the boiler itself. The horizontal part of the fumes exhaust side must be inclined towards the boiler. The intake must slope towards the outside to prevent rain water entering.

- exhaust to the outside directly with the boiler pipes with

condensate collection inside the boiler itself. The intake must slope towards the outside to prevent rain water entering.

in gure 5.18 it is possible to see a separated type of fumes exhaust, where fumes exhaust was realised with exible hose

in polypropylene for piping of technical cells. The condensate produced in the vertical pipe must all be conveyed into the boiler. The intake must slope towards the outside to prevent rain water entering.

Figure 5.17 - Example of “80/80 PP System” installation

Figure 5.18 - Example of “80/80 PP System” installation

5 - INSTALLATION

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MYDENS

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020002.01.012

5.16.5 - “60/100PP vertical coaxial” System (polypropylene) (C13; C33)

The appliance is supplied as per standard without ttings

for the connection of the fumes exhaust/air intake. To connect the boiler to a 60/100 coaxial system, the relevant

kit must be requested and must be installed as in gure

5.19.

ATTENTION !!! Scrupulously follow the installation

phases of the coaxial pipe as illustrated in gure 5.21. In

particular:

1.- introduce the coaxial pipe “C” inside the bend “A”;

2.- x the external pipe using the stainless steel self-threading

screws “B”.

ATTENTION !!! The coaxial exhaust and

intake pipes must be appropriately sustained via rigid brackets positioned non more than 1 metre from each

other. The brackets must be xed to rigid walls that can

support the weight of the pipe itself.

ATTENTION !!! Once these operations have

been performed, check that the exhaust/intake terminal is exposed to the outdoors with the tolerances given in

gure 5.25

Take particular care with the installation of pipes in the part

that passes through the wall to the outside. The normal

maintenance operations must always be possible, therefore

install the pipes in a sheath so that they can be slid out.

The horizontal tracts must always have an inclination of at

least 2% towards the boiler.

The fumes exhaust/air intake pipe can be extended up to

a maximum distance as indicated in the table in chapter

9 at the end of the manual. Every 90° bend has a loss

equivalent to 1 metre of linear pipe. Every 45° bend has a

loss equivalent to 0.5 m of pipe.

Figure 5.19 - Installation of vertical coaxial system

Figure 5.20 - Quotes and hole centre to centre distances for coaxial drain pre-installation

Figure 5.21 - Positioning the coaxial pipe

5 - INSTALLATION

Page 29

MYDENS

COSMOGAS

Figure 5.23 - Quotes and hole centre to centre distances for coaxial drain pre-installation

5 - INSTALLATION

Figure 5.24 - Positioning the coaxial pipe

5.16.6 - “60/100PP horizontal coaxial” System (polypropylene) (C13; C33)

The appliance is supplied as per standard without ttings

for the connection of the fumes exhaust/air intake. To connect it to a 60/100 coaxial system, the relevant kit must

be requested and must be installed as in gure 5.22.

ATTENTION !!! Scrupulously follow the installation

phases of the coaxial pipe as illustrated in gure 5.24. In

particular:

1. - introduce the coaxial pipe “C” inside the bend “A”;

2. - x the external pipe using the stainless steel self-threading

screws “B”.

ATTENTION !!! The coaxial exhaust and

intake pipes must be appropriately sustained via rigid brackets positioned non more than 1 metre from each

other. The brackets must be xed to rigid walls that can

support the weight of the pipe itself.

ATTENTION !!! Once these operations have

been performed, check that the exhaust/intake terminal is exposed to the outdoors with the tolerances given in

gure 5.25

Take particular care with the installation of pipes in the part

that passes through the wall to the outside. The normal

maintenance operations must always be possible, therefore

install the pipes in a sheath so that they can be slid out.

The horizontal tracts must always have an inclination of at

least 2% towards the boiler.

The fumes exhaust/air intake pipe can be extended up to

a maximum distance as indicated in the table in chapter

9 at the end of the manual. Every 90° bend has a loss

equivalent to 1 metre of linear pipe. Every 45° bend has a

loss equivalent to 0.5 m of pipe.

020002.01.013

Figure 5.22 - Installation of horizontal coaxial system

Page 30

MYDENS

COSMOGAS

5.16.7 - “60/100PP Coaxial” System: accessories available

The following accessories are available on request to make the 60/100 coaxial fumes exhaust/air intake system: (the number after the code is used to recall the piece in the

following drawings)

62617255 - N° 2 converts for pitched roofs from 5° to 25° extension L = 1000 mm 62617234 - N° 1 90° coaxial bend M/F PP 62617252 - N° 6 45° coaxial bend M/F PP 62617231 - N° 7 Coaxial extension L 1m PP 62617304 - N° 3 coaxial PP roof terminal 62617232 - N° 5 coaxial PP wall terminal

5 - INSTALLATION

Page 31

MYDENS

COSMOGAS

5.16.8 - “60/100PP Coaxial” System: installation examples

When a coaxial exhaust is made (see gure 5.25), both vertical

and horizontal, the exhaust pipe slope upwards in a way to

make the condensate ow into the boiler.

Figure 5.25 - Examples of coaxial pipe installation

5 - INSTALLATION

Page 32

MYDENS

COSMOGAS

6.1 - Operating

Before starting the appliance up, it is necessary to carry out the following.

6.1.1 - User instruction

Instruct the user regarding correct use of the appliance and the plant in general. In particular:

Give the installation and use manual and all

documentation contained in the packaging to the user.

Instruct the user concerning the special measures for the

exhaust of burned gases, informing them that they must

not be modied.

Inform the user regarding the control of the pressure

of the water required in the plant and the measures

necessary to ll and bleed the air.

Inform the user regarding the correct adjustment of

the temperatures, control units/room thermostats and radiators for energy saving.

6.1.2 - Filling the condensate drain siphon

IThe siphon found inside the boiler (see gure 3.1 detail “49”), must be lled with water to create the water head able to prevent the fumes escaping from pipe “F” in gure 5.5. Proceed as follows to do this: (refer to gure 6.1)

1.- loosen the screw “E”;

2.- remove the lid “D” and the gaskets “C”;

3.- introduce a rubber hose into the opening “B” (do not confuse with “A”) and the other end of the hose into the

funnel;

6 - OPERATING

Figure 6.1 - Filling the condensate drain siphon

4.- use the funnel to slowly pour about 200 cm³ (a glass) of water;

5.- re-mount everything in reverse order.

ATTENTION !!! If the boiler remains off for

more than 3 months, the siphon must be lled again as

explained above.

6.1.3 - Filling the central heating plant

If the word FILLappears on the visual display when the boiler is powered electrically, it means that the central

heating plant must be lled. Proceed as follows:

only use clean water from the network.

ATTENTION !!! The addition of chemical

substances such as anti-freeze must be performed in compliance with the product instructions. In all cases, these substances must not be introduced directly inside the boiler.

1.- open the ll cock positioned under the boiler (see gure

7.2 detail “A”) and ll the plant to about 1.5 bar (the word

FILL) will disappear from the visual display;

2.- make sure there are no water leaks from the ttings;

3.- close the ll cock (see gure 7.2 detail “A”);

4.- bleed the heating elements;

5.- check the pressure on the boiler display again. If it has

dropped, ll up to 1.5 bar again.

Page 33

MYDENS

COSMOGAS

6.2 - General recommendations

regarding the supply of gas

For commissioning of the boiler, have a professionally

qualied technician perform the following checks:

That the boiler is powered by the type of fuel for which it

is set-up.

That the gas supply pressure (with boiler operating

and at a standstill) is within the maximum and minimum

values indicated in the table in chapter 9 at the end of the manual.

That the supply plant has all safety and control parts

envisioned by the current national and local Standards.

That the fumes discharge terminal and the combustion

agent air intake terminal are free from any obstruction.

That the fumes exhaust and combustion agent air intake

terminal are positioned outside the building.

That the condensate drain connection is connected.

ATTENTION !!! If you smell gas:

A - Do not switch on any electric device, telephone

included or any object that can cause sparks;

B - Immediately open doors and windows causing

a current of air that quickly cleans the gas from the room;

C - From another room, or from a neighbour’s,

immediately call a professionally qualied

technician or the gas supply company. Call the Fire Service if the former are not available.

6.3 - Type of gas for which the

appliance is regulated.

There is a label on the front of the appliance certifying the gas supply type and pressure for which the boiler is adjusted. The boiler may have the following 2 types of wording:

2H-G20-20mbar NATURAL GAS

means that the appliance is adjusted to operate with H type

gas of the second family (natural gas) at a supply pressure

of 20 mbar.

3P-G31-37mbar LP GAS

means that the appliance is adjusted to operate with type P

gas (Propane, also called LP Gas) of the third family, at a

supply pressure of 37 mbar.

6 - OPERATING

Page 34

MYDENS

COSMOGAS

6.4 - Conversion of the appliance

from one type of gas to another

- Read these instructions carefully before

changing the gas:

- The gas appliance must be installed, calibrated or

modied by specialised staff in compliance with legal

terms;

- Check and be certain that the type of gas which is powering the appliance is compatible with the adjustment kit in your possession;

- Do not power the boiler with gases different from those envisioned.

Follow the instructions given below to change the gas: 1 - disconnect the electric power supply upstream from the

appliance;

2 - open the boiler casing as reported in chapter 8.2;

3 - access the control and command board as reported in

chapter 8.2;

4 - move the microswitch “B” of switch “A” from left to right

to the “ON” position (see gure 6.5);

5 - apply electric power to the boiler;

6 - the parameter 3001 will appear on the boiler’s visual

display, followed by its value;

7 - using the

and keys, access the

parameter 3002.

8. - press the RESET key to make the 3002 parameter

ash

9. - using the

and keys, set the value of

parameter 3002 to the new corresponding value

according to the table in gure 6.7 (for 15 kW also modify

parameter

2002 taking it to 50 as indicated in the

INSTALLER MENU chapter).

10. - press the RESET key to conrm the modication.

11.- remove voltage from the boiler, re-position the microswitch

“B” of switch “A” from right to left in “OFF” position (see gure

6.5).

12. - close the gas supply;

13. - remove the air manifold making sure to turn it

externally and then slide it out of the fan inlet (see gure

6.2, detail “C”);

15. - remove the gas inlet pipe via the two ttings (see gure 6.2, details “H” and “L”)

16. - remove the clamping spring “M” from the seat “N”

releasing the valve “P” (See gure 6.3, detail “M”)

17. - slide the gas valve “P” out upwards;

18. - replace the gas nozzle “R” (see gure 6.4) with an appropriate one according to that stated in gure 6.7 under “Diameter of the gas nozzle”;

19. - remount the gas valve (see gure 6.3, detail “P”),

making sure to reposition the spring “M”.

20. - remove the gas supply pipe via the two ttings (see gure 6.2, details “H” and “L”);

21. - re-mount the air manifold (see gure 6.2, detail “C”);

22. - open the gas cock;

23. - check for any gas leaks using the relevant means of control.

020002.01.040

020002.01.041

020002.01.042

Figure 6.4 - Replacing the gas nozzle

Figure 6.3 - Removing the gas valve

Figure 6.2 - Removing the air manifold

6 - OPERATING

Page 35

MYDENS

COSMOGAS

ATTENTION !!! Perform the leak test using a soap

and water only.The use of naked ames is prohibited.

ATTENTION !!! If you smell gas:

A - Do not switch on any electric device, telephone

included or any object that can cause sparks;

B - Immediately open doors and windows causing

a current of air that quickly cleans the gas from the room;

C - From another room, or from a neighbour’s,

immediately call a professionally qualied

technician or the gas supply company. Call the Fire Service if the former are not available.

24.- Check the supply gas pressure, following the procedure

in chapter 6.6;

25.- Open the CO2 adjustment screw completely (see gure

6.14 detail “A”);

26.- Control and adjust the CO2, following the procedure in

chapter 6.8;

27.- Instead of the label that identified the old state of adjustment, apply the sticker onto the front casing of the

boiler (see gure 6.6), certifying the appliance’s new state

of adjustment, as follows: apply label “B” if the boiler has

been converted from natural gas to LP gas; apply label “A”

if the boiler has been converted from LP gas to natural gas.

A – Microswitch B - Switch

Figure 6.5 - Positioning the switch

020002.01.043

OFF

6 - OPERATING

Model

Type

of gas

Setting

parameter

3002

Gas supply

minimum pressure

(mbar)

Gas supply

maximum

pressure

(mbar)

Gas nozzle

diameter

(mm)

CO2

Maximum

power

(%)

CO2

Minimum

power

(%)

Maximum

power

(%)

Minimum

power

(%)

MET 50 15 27 4,9 9,0 ±

0,3 8,5 ± 0,2 4,8 ± 0,2 5,5 ± 0,2

GPL 51 25 45 3,7 10,5 ± 0,3 10,0 ± 0,2 4,8 ± 0,2 5,6 ± 0,2

MET 50 15 27 4,9 9,0 ±

0,3 8,5 ± 0,2 4,8 ± 0,2 5,5 ± 0,2

GPL 51 25 45 3,7 10,5 ± 0,3 10,0 ± 0,2 4,8 ± 0,2 5,6 ± 0,2

MET 52 15 27 6,7 9,0 ±

0,3 8,5 ± 0,2 4,8 ± 0,2 5,5 ± 0,2

GPL 53 25 45 5,2 10,5 ± 0,3 10,0 ± 0,2 4,8 ± 0,2 5,6 ± 0,2

Figure 6.6 - Labels certifying the new status of adjustment of the boiler

Figure 6.7 - Correspondence table for the parameter 3002 and the operating values

Page 36

MYDENS

COSMOGAS

Figure 6.8 - Gas valve

A - Gas inlet pressure point.

6 - OPERATING

6.5 - Ignition

1.- open the gas cock;

2.- power the boiler electrically;

3.- adjust the temperature required from the heating service

using the

and keys. The icon , present on the display will inform regarding the operating state of the heating service:

a) xed icon

: central heating inactive (check that the room thermostat is in call mode or, in the case of external mode, that the external temperature is lower than the central heating switch-off external temperature

(par 2020);

b) ashing icon

: means that the central heating mode

is operating.

4. - adjust the temperature required for the domestic hot water

service using the

and keys. The icon , present on the display will inform regarding the operating state of the domestic hot water service:

a) xed icon

: domestic hot water inactive (no-one is withdrawing domestic hot water, or in the case of a indirect water heater, the delivery temperature is

reached)

b) ashing icon

: domestic hot water is being withdrawn.

5.- if the icon

ashes, but the radiators do not heat-up,

it may mean that the pump (see gure 3.1 detail “25”) is

blocked. It must be unblocked by operating on the relevant

screws. To do this remove screw “26” in gure 3.1 and turn the screw below to unblock the pump;

6.- if the icon

ashes but the radiator still does not heat

up, bleed the air from the radiators again.

6.6 - Controlling the supply gas pressure and any adjustment

The gas supply pressure must correspond to that stated in the table in chapter 9 at the end of the manual. Proceed as follows to verify:

1.- close the gas cock;

2.- access the components inside the boiler, following the

procedure in chapter 8.2;

3.- loosen the pressure point “A” (see gure 6.8);

4.- connect to a manometer with resolution of at least 0,1

mbar (1 mmH2O);

5.- open the gas cock;

6.- check that the pressure does not exceed the value given in the table in chapter 9 under “gas supply maximum

pressure”;

7.- make sure that any cocks and thermostatic valves

downstream from the central heating circuit are open;

ATTENTION !!! During forcing of the delivery

temperature, it automatically goes to 93°C to give the possibility to dispose of as much of the heat generated by the boiler as possible. Check that the central heating plant can support this temperature.

8.- press the

and RESET keys simultaneously

for more than 5 seconds to enter the “installer” menu,

conrmed by the appearance of the icon

on the

display.

9.- using the

and keys, access the

parameter 2010;

10.- press the RESET key to enter the parameter and use the

and keys to modify the value to HIgH;

11.- press the RESET key to conrm the modication. Now

the burner will operate at maximum power for 10 minutes.

12.- check that the pressure does not drop to a value lower than the “gas supply minimum pressure” given in the table in chapter 9. If the supply pressure does not respect the values described, operate upstream from the appliance in order to take it back within the minimum and

maximum eld;

13.- once the control has ended, press the RESET key

again to enter parameter

2010 and via the

and

keys, change the value to OFF;

14.- press the RESET key to conrm the modication;

15.- hold the RESET key down for 5 seconds to exit the

“installer” menu;

16.- close the pressure point “A” in gure 6.8;

17.- check for any gas leaks from the point with relevant control methods.

ATTENTION !!! Perform the leak test using a soap

and water only. The use of naked ames is prohibited.

020002.01.023

Page 37

MYDENS

COSMOGAS

Figure 6.9 - Combustion agent air pressure point

Figure 6.11 - Controlling combustion agent air pressure

6.7 - Controlling the combustion

agent air pressure

As the boiler has an air/gas ratio xed in the factory, the gas

pressure at the burner is controlled indirectly by measuring the pressure of the combustion agent air inside the boiler and must correspond to that stated in the table in chapter 9, under “Combustion agent air pressure”. Proceed as follows for the check (refer to the Figures from

6.9 to 6.12):

1.- use a differential manometer with precision of at least 0.1

mbar (1 mmH2O);

2.- close the gas cock;

3.- open the boiler casing following chapter 8.2;

4.- remove the caps “A” (see gure 6.9);

5.- take the exible hose “D”, which is found inside the appliance and remove the cap “B” (see gure 6.9);

6.- insert the pipe “D” inside the hole indicated by the arrow

in gure 6.9;

7.- loosen the pressure point “H” in gure 6.10;

8.- take a silicone pipe with external diameter of 10 mm and

internal diameter of 7mm (detail “E” in gure 6.10) and introduce it into pressure point “H”;

9.- inserire il tubo “E” nel foro come indicato in gure 6.11;

10.- connect the manometer to the two pipes “E” and “F” as

illustrated in gure 6.12, making sure to connect the pipe “E”

to the negative pressure point and tube “F” to the positive

pressure point;

11.- close the casing “B” in gure 8.1. It is indispensable

to have a reliable measurement;

12.- switch the boiler on;

13.- press the

and RESET keys simultaneously

for more than 5 seconds to enter the “installer” menu,

conrmed by the appearance of the icon

on the

display.

14.- using the

and keys, access the

parameter 2010;

15.- press the RESET key to enter the parameter and use

the

and keys to modify the value to FAn;

16.- press the RESET key to conrm the modication. Now

the fan will operate at maximum speed for 10 minutes.

17.- compare the pressure value read on the manometer with that given in the table in chapter 9, “Combustion agent air pressure”. If the pressure is at a lower value, check that there are no obstructions in the combustion agent air/fumes exhaust or that the air intake/fumes exhaust system is not longer than envisioned in chapter 9 under “Max. length of

fumes pipe”;

18.- once the control has ended, press the RESET key

again to enter parameter

2010 and via the

and

keys, change the value to OFF;

19.- press the RESET key to conrm the modication;

20.- hold the RESET key down for 5 seconds to exit the “installer” menu.

At the end of the control, remove the tube “E”, close the holes “A”, close the pipe “D” using cap “B” and close the

pressure point “H” again as in gures 6.9 and 6.10.

6 - OPERATING

C B

020002.01.019

020002.01.020

Figure 6.10 - Combustion agent air pressure point

020002.01.022

Page 38

MYDENS

COSMOGAS

Figure 6.13 - Combustion analysis points

6.8 - Controlling the level of

CO2 and any adjustment

The boiler in normal operating mode and for altitudes within 1000

m, has a level of CO2 (carbon dioxide) in the fumes, which can be

detected in the table in chapter 9. A value different to those reported can cause malfunctions. Combustion analysis must be performed to check and eventually adjust this value. Proceed as follows:

1.- check a combustion analyser to the appropriate point on

the fumes exhaust tting “B” in gure 6.13;

2.- make sure that any cocks and thermostatic valves

downstream from the central heating circuit are open;

ATTENTION !!! During forcing of the delivery

3.- press the

and RESET keys simultaneously

for more than 5 seconds to enter the “installer” menu,

conrmed by the appearance of the icon

on the

display.

4.- using the

and keys, access the

parameter 2010;

5.- press the RESET key to enter the parameter and use the

and keys to modify the value to HIgH;

6.- press the RESET key to conrm the modication. Now

the burner will operate at maximum power for 10 minutes.

7.- wait for the CO2 measurement to stabilise;

8.- compare the value measured with that given in the

table in gure 6.7, “CO2 maximum power”. If the value

measured is offset from the value read, it must be taken

back within the value given in the table in gure 6.7.

Proceeding as follows:

a) turn screw “A” clockwise as in gure 6.14 to decrease

the level of CO2;

b) turn screw “A” anti-clockwise as in gure 6.14 to increase

the level of CO2;

9.- once the check has been completed, seal the screw “A” in

gure 6.14 with red paint or similar system;

10.- press the RESET key again to enter the parameter

2010 and use the and keys to modify

the value to

LOu;

11.- press the RESET key to conrm the modication. Now

the burner will operate at minimum power for 10 minutes.

12.- wait for the CO2 measurement to stabilise;

13.- compare the value measured with that given in the

table in gure 6.7, “CO2 minimum power”.

If the value measured is offset from the value read, it must

be taken back within the value given in the table in gure

6.7. proceeding as follows:

a) turn screw “B” anti-clockwise as in gure 6.14 to decrease

the level of CO2;

b) turn screw “B” clockwise as in gure 6.14 to increase

the level of CO2;

14.- Once the check has been completed, seal the screw “B”

in gure 6.14 with red paint or similar system;

15.- press the RESET key again to enter the parameter

2010 and use the and keys to modify

the value to

OFF;

16.- press the RESET key to conrm the modication.

17.- hold the RESET key down for 5 seconds to exit the “installer” menu.

6 - OPERATING

020002.01.015

Figure 6.14 - Gas valve

A - CO2 adjustment screw at maximum power; B - CO2 adjustment screw at minimum power;

020002.01.045

020002.01.021

Figure 6.12 - Controlling combustion agent air pressure

Page 39

MYDENS

COSMOGAS

Figure 6.15 - Corresponding values to introduce

into the parameter

2002 to obtain the desired

power necessary in central heating mode

6 - OPERATING

Figure 6.16 - domestic hot water ow rate selector

020002.01.016

BOILER MODEL

Power

necessary

(kW)

15 24 34

35 33 94 31 88 29 82 27 76 25 98 70 23 89 64 21 80 58 19 71 52 17 62 46 15 53 40 13 44 44 34 11 35 35 28

9 26 26 22 7 17 17 16 5 8 8 10

ATTENTION !!! If during forcing, the power

supplied by the boiler is much higher than the power absorbed by the plant, the boiler switches off continuously to reach the maximum temperature allowed (93°C). To remedy this problem the heating power must be set at the effective plant requirement, as laid down in chapter 6.9 and the CO2 analysis test or

combustion efciency test must be carried out, setting

parameter

2010 previously referred to at the rEg.

value

6.9 - Adjusting the power in central

heating mode (Range Rated)

This appliance is designed and type-approved to adapt the maximum heating power to the effective necessity of the plant as per calculation. To do this and to use the boiler’s potentiality to its best, it is recommended to set the maximum power in central heating mode at the effective requirement of the plant. Operate as follows:

1.- press the

and RESET keys simultaneously

for more than 5 seconds to enter the “installer” menu,

conrmed by the appearance of the icon

on the

display.

4.- using the

and keys, access the

parameter 2002;

5.- press the RESET key to enter the parameter and using the

and keys modify the value corresponding to the power required by the plant, according to the table in Figure 6.15.

6.- press the RESET key to conrm the modication.

7.- hold the RESET key down for 5 seconds to exit the “installer” menu.

6.10 - Adjusting the domestic

hot water ow rate

The boiler is supplied with a domestic hot water maximum

ow rate adjuster. However, if the boiler is installed in a

geographical area where the temperature of the cold water

is very low, the ow rate of domestic hot water that passes

inside the boiler may have to be reduced. It is therefore good practice to perform this adjustment:

1.- switch the boiler on;

2.- using the

and keys, adjust the

temperature of the domestic hot water to 48 - 50°C;

3.- open the hot water cock completely.

In the case of a single lever mixer, the position must be

completely on “HOT”;

4.- wait 3 minutes for the temperature to stabilise;

5 - if the water temperatures too cold, the ow rate must

be reduced via the selector “A” in gure 6.16, until the

desired temperature is reached.

Page 40

MYDENS

7.1 - Controlling cock opening

- The gas cock must be open;

- Any valves positioned on the supply and return must be open;

- Any valves positioned on hot and cold water, must be open.

7.2 - Checking central

heating plant pressure

If the pressure inside the central heating circuit drops below

0.5 bar, the visual display “N” in gure 7.1, shows FILL

to indicate that the correct pressure must be restored. Proceed as follows:

1.- pull the knob “A” in gure 7.2 downwards;

2.- open the ll cock turning the knob anti-clockwise to ll the plant;

3.- check the pressure on the visual display “M” in Figure

7.1, it must reach the pressure of 1 - 1.5 bar (the FILL

indication disappear on exceeding 0.8 bar);

4.- close the ll cock (see knob “A” in gure 7.2), turning it

clockwise.

In some boiler models the plant ll knob “A” in gure 7.2

may be absent. Therefore operate on the device envisioned by the installer upstream from the boiler itself.

ATTENTION !!! During normal operation, the

ll cock “A” (see gure 7.2) must always remain in the

closed position.

If the pressure drops through time, restore the correct value. This operation may have to be repeated several

times in the rst month of operation to remove any air

bubbles in the plant.

COSMOGAS

7 - USE

Figure 7.1 - Control board

Key for gure 7.1

A - Key for reducing the central heating temperature (below

minimum the central heating is put in OFF)

B - Reset Key C - Key for switching-on and increasing the heating

temperature

D - Burner status (the burner is on when this con is present)

E - Status of the heating service: Icon off = Central heating off Icon on = Central heating active but not operating

Icon ashing

= Central heating active and operating F - State of the domestic water service: Icon off = Domestic water off Icon on = Domestic hot water active but not operating

Icon ashing

= Domestic hot water active and operating G - Icon for entry into the “Installer” menu H - Unit of measurement of the pressure displayed L - Status of the cascade pump (if the icon is present, the

pump is on)

M - Central heating plant pressure or indicator of the

various parameters inside the various menus

N - Temperature of the central heating or domestic hot

water or indicator if the values assumed by the various

parameters O - Unit of measurement of the temperature displayed P - Central heating service adjusted by the external sensor Q - Boiler blocked (see chapters 7.19.1 and 7.19.2 for the

diagnostics)

R - Key for switching on and increasing the temperature of

the domestic hot water or for scrolling and changing the

value of the parameters S - Key for reducing the temperature of the domestic

hot water (below minimum, the domestic hot water is

switched OFF) or for scrolling and changing the value of

the parameters T - On/off switch

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7.3 - Generalities

During operation the display shows the boiler operating state as well as other information as indicated in chapter

7.19 (Diagnostics).

Other parameters can be consulted through the

“User menu” (see chapter 7.17), which are useful for

understanding operation of the appliance and to control the latest blocks or errors occurring. After 5 minutes of normal operation, the display switches off completely to save energy. Just press any key to switch it back on. In the case of any anomaly, the display switches back on

automatically. This function can be modied by following chapter 7.16 (Energy saving).

7.4 - Ignition procedure

1.- open the gas cock;

2.- power the boiler electrically;

3.- adjust the domestic hot water temperature and of the central heating respectively as per chapters 7.8 and 7.9.

The command and control equipment will switch the burner on. If ignition does not take place within 20 seconds, the boiler automatically re-attempts ignition 3 times, after which if it still

does not ignite, it blocks and the display will indicate Loc 1. Press the RESET key to restore the normal operating conditions. The boiler will automatically attempt a new ignition.

ATTENTION !!! If shutdown due to blocking is

repeated frequently, contact a qualied technician to reset

the normal operating conditions.

Once the boiler has been ignited correctly, it will continue to operate for the service requested.

7.5 - “User menu”

Entry into the “User menu” is highlighted by the visual display

“M”, in gure 7.1, which indicates parameters that can assume

values from 1001 to 1999. To enter the “User menu”:

1.- hold the RESET key down for 2 seconds until the visual

display “M” shows 1001;

2.- press the

and keys to scroll the parameters

situated inside the user menu;

3.- hold down the RESET key for more than 2 seconds to

exit the “User menu”;

If no key is pressed for more than 60 seconds, the menu is exited automatically. The parameters in chapter 7.17 can be queried in this menu.

7.6 - Summer operating mode

Whenever the central heating function is to be interrupted for a long period of time, leaving only the domestic hot water function operating, adjust the central heating temperature to

minimum using the

or keys until

the word

0FF appears.

7.7 - Winter operating mode

In winter operating mode, using the pump, the boiler sends

the water to the plant at the temperature set using the

keys.

When the temperature inside the boiler approaches the

temperature set, the burner starts to modulate the ame until

the power is reduced to the effective requirement of the plant. If the temperature tends to rise further, the burner stops. At the same time, the pump that sends water to the plant is switched on and off by the room thermostat. This can be

noted because the

indicator ashes when the pump is

on, while it remains on with a xed light when the pump is off.

The pump may initially make a noise. This is due to the presence of residual air in the hydraulic plant, which will disappear quickly, without any intervention. For rational use of the boiler, it is recommended to keep the

central heating temperature, adjusted using the

keys, at the lowest value possible, compatibility with the temperature requested in the rooms. If the winter season is particularly cold, meaning the room temperature can no longer be maintained, raise the central heating temperature to higher values.

Figure 7.2 - Plant ll cock

B A C

02002.01.044

Key for gure 7.2

A = Plant ll knob

B = Closing direction C = Opening direction

COSMOGAS

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7.8 - Adjusting the instantaneous domestic hot water

The temperature of the domestic hot water is adjusted by

operating on the

and keys. On pressing one

of the two keys, the visual display “N” in gure 7.1 will start to ash and show the temperature that is being set. The range

of adjustment for the temperature of the domestic hot water goes from 40°C to 60°C or from 40°C to 70°C if there is a indirect water heater present.

By holding the

key down also below 40°C, OFF will

appear to indicate switch-off of the domestic hot water service,

also highlighted by switch-off of the icon “F” in gure 7.1.

7.9 - Central Heating

Using the parameter 2003 present in the “Installer menu”

(see chapter 7.18) it is possible to select different operating

modes of the central heating service:

2003 = 00; “Thermostatic adjustment”: the central heating

supply temperature is adjusted manually via the

or keys . The opening and closing of the room thermostat stops or starts the boiler pump correspondingly

in order to adjust the room temperature;

2003 = 01; “Climatic adjustment”: The icon appears on

the display

, the supply temperature to central heating is adjusted automatically by the external temperature sensor according to the algorithm corresponding to Figure 7.3. The opening and closing of the room thermostat stops or starts the boiler pump correspondingly. When the external

temperature rises above the value set in parameter 2020

(Central heating switch-off external temperature), the

central heating service ends. It re-starts automatically when the external temperature drops below the temperature set

in the parameter 2020 again.

- 2003 = 02; “Climatic adjustment with room compensation”:

Th e icon

appears on th e dis pla y, the supply temperature to central heating is adjusted automatically by the external temperature sensor according to the algorithm corresponding to Figure 7.3. The opening of the room thermostat reduces the temperature if the supply to central

heating by a value set in the parameter 2027 The boiler pump operates constantly. When the external temperature

rises above the value set in parameter 2020 (forced

central heating switch-off), the central heating service ends.

It re-starts automatically when the external temperature drops below the temperature set in the parameter 2020

again (forced central heating switch-off).

7.10 - Thermostatic adjustment

In the factory the boiler is adjusted with the parameter 2003 to 00, i.e. the boiler supplies hot water to the central heating

plant at a temperature adjusted using the or

keys. Any room thermostat operates directly on the pump inside the boiler to adjust the heating of the rooms. To make full use of boiler performance, it is recommended

to adjust the temperature to a value just sufcient to obtain

the temperature desired by the rooms. If the season gets colder, progressively increase the value of the central heating temperature. Proceed in reverse order when the season goes towards warmer temperatures. This very simple operating method is suitable for the following types of plants:

- small plants, with radiators, having a room whose temperature

is characteristic of all other rooms;

- large plants, with radiators, where each area is controlled by its own room thermostat and the boiler pump is stopped

only when all area thermostats are satised (envision the appropriate electric plant).

- large plants, with radiant panels (low temperature), where

each area is controlled by its own room thermostat and the boiler pump is stopped only when all area thermostats are

satised (envision the appropriate electric plant).

7.11 - Climatic adjustment

Using the “Installer menu” adjust the parameter 2003 to

01. The central heating supply temperature is reported to

the external temperature sensor according to the algorithm in

gure 7.3. To adapt the calculation line to the various hones/

climatic conditions, all adjustment parameters must be set according to the following chapters.

7.11.1 - Climatic adjustment: on which

plants?

The “Climatic adjustment” is a more sophisticated and precise adjustment than the “Thermostatic adjustment”. This can make the most use of the boiler performance and is suitable for the following types of plant:

- small plants, with radiators, having a room whose temperature is characteristic of all other rooms. The room thermostat makes the appropriate corrections to the room temperature by switching the boiler pump on and off.

- large plants, with radiators, where each area is controlled by its own room thermostat and the boiler pump is stopped

only when all area thermostats are satised (envision the appropriate electric plant).

- small plants, with radiant panels (low temperature), having a

room whose temperature is characteristic of all other rooms. The room thermostat makes the appropriate corrections to the room temperature by switching the boiler pump on and off.

- large plants, with radiant panels (low temperature), where

each area is controlled by its own room thermostat and the boiler pump is stopped only when all area thermostats are

satised (envision the appropriate electric plant).

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7.11.4 - Climatic adjustment: adaptation to

different climatic areas

The previously recommended values are for homes with average insulation and for climatic areas where the external temperature used for calculating heat requirement is

-5°C (with this data and a high temperature plant, there is

correspondence with the graphics in Figure 7.3). If the climatic

area is different, adjust parameter 2021 “Design external

temperature (winter)” in a way to obtain a supply temperature of 67°C (40°C in the case of “Low temperature” plants), when

the external temperature is that of the calculation base of the heat requirement.

7.11.5 - Climatic adjustment: switching the

central heating service on and off

The climatic adjustment service is completely automatic, also regarding switch-off at the end of the season and successive switch-on at the start of the next season via the parameter

2020. When the external temperature rises above the value

set in this parameter, the heating switches off automatically. When the external temperature drops back below the value set in this parameter, the central heating service switches back on automatically.

7.11.6 - Climatic adjustment with room

compensation

Using the “Installer menu” (see chapter 7.18) adjust the

parameter 2003 to 02. Everything operates exactly as in the previous chapters relative to the “Climatic adjustment”, with the difference that now the boiler pump is always on. The opening of the room thermostat contact translates into a parallel downward movement of the line regarding the value

set on the parameter, as in gure 7.3 2027 ppresent in the “Installer menu” (see chapter 7.18). Parameter 2027

can assume values between 0°C and 50°C. The values recommended for this parameter are:

- 10°C for high temperature plants (radiators)

- 3°C for low temperature plants (oor).

Values of this parameter that are too high can translate into instability of the room temperature. Values that are too low can make the room thermostat ineffective.

The climatic adjustment with room compensation can be used in all cases envisioned in chapter 7.11.1, with the advantage that continuous operation of the pump manages to stabilise

and make the room temperatures uniform; especially in the case in which several heat plant loops have the ow

resistances that are much higher than others.

7.11.2 - Climatic adjustment: precautions during adjustment

To set the supply temperature correctly, it is good practice to

immediately set the line setting values in gure 7.3. If these

values do not give a satisfactory result, proceed with the

relevant modications, keeping in mind that:

- every parameter must be adjusted in small degrees;

- after each change, wait at least 24 hours to see the result;

- the more the adjustment line app roach es the real requirements of the building, the more building central heating will be comfortable and the greater the energy

saving will be;

- using the or keys, it is possible to make the

small corrections highlighted in gure 7.3, i.e. move the

parallelism of the line, in steps of 1 °C more or less, up to 10°C.

7.11.3 - Climatic adjustment: setting the

parameters

Using the “Installer menu” (see chapter 7.18), set:

- 2020 = “External switch-off temperature of the central heating”, adjustable between 0 and 35°C. When the external temperature reaches the value set in this parameter, the central heating is switched-off automatically. The central heating switches back on automatically when the external temperature drops back below this value. The recommended start value is 22°C.

- 2021 = “Design external temperature (winter)”, adjustable

between -20 and 5°C. It is the design external temperature

used to dene the heat output necessary at the plant. The value recommended for a typical home is -5°C;

- 2022 = “Supply temperature corresponding to the design

external temperature (winter)”, adjustable between 0 and

80°C. The supply temperature assumes the value set in this parameter when the external temperature corresponds

to that set in parameter 2021. The recommended start

values are: 40°C for low temperature plants (oor heating); 67°C for high temperature plants (radiators);

- 2023 = “External spring-like temperature”, adjustable between 0 and 30°C. It is the external temperature at which the central heating is to reach the minimum supply

temperature. The recommended start value is 18°C;

- 2024 = “Supply temperature corresponding to the external spring-like temperature”, adjustable between 0 and 40°C. The supply temperature assumes the values set in this parameter, when the external temperature corresponds to

that set in the parameter

2023. The recommended start

values are: 30°C for low temperature plants (oor heating); 42°C for high temperature plants (radiators);

- It is always possible to set the minimum and maximum central heating temperatures using the respective parameters

3016 and 3015 present in chapter 11.

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Figure 7.3 - Climatic adjustment graphics for “high temperature” plants (with radiators)

External temperature (°C)

Calculated temperature (°C)

Par. 2020 = External temperature for central heating switch-off Par. 2021 = Project external temperature (winter) Par. 2022 = Supply temperature corresponding to the project external temperature (winter) Par. 2023 = Spring-like external temperature Par. 2024 = Supply temperature corresponding to the spring-like external temperature Par. 3016 = Minimum supply temperature Par. 3015 = Maximum supply temperature

= Line parallelism increase key

= Line parallelism decrease key

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Par. 2021

Par. 2023

Par. 2020

Par. 3016

Par. 2024

Par. 2022

Par. 3015

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7.12 - Timers of the various functions

To safeguard the lifespan of the appliance, improve the comfort generated and increase energy saving, timings have been introduced during operation. These timings are:

- Pump post-circulation: every time that the room thermostat determines the end of the central heating service, the pump

continues to operate for 3 minutes;

- Central heating delay: every time that the domestic hot water

service nishes, before reactivation of the central heating service there is a stand-by period of 2 minutes;

- Pumps anti-block and diverter valve: every 24 hours, the central heating pump, the domestic hot water pump (if

present) and the diverter valve are forced;

- Anti-legionella; if the boiler is connected to a indirect water

heater for preparation of the DHW., every seven days the latter is forced to a temperature of 60°C to disinfect against the legionella bacteria. This function activates also due hours after the boiler has been powered electrically.

- Ignition delay: In all operating modes, excluding domestic hot water mode, wait 3 minutes to ignite the burner again when it switches off.

7.13 - Pumps anti-blocking

and diverter valve

The pump switches on once every 24 hours for 15 seconds during the summer period in order to prevent any deposits that may block it. The diverter valve and the indirect water

heater pump (if present) are activated at the same time for

the same reason.

7.14 - Anti-freeze protection

ATTENTION !!! For the anti-freeze protection

to be effective, the appliance must be left with electric power supply and gas supply present and the two services (domestic hot water and central heating) in the

OFF position.

ATTENTION !!! The anti-freeze protection

service offered by the boiler cannot guarantee the anti-freeze protection of the central heating plant, the domestic hot water plant or the building served or part of the same.

The central heating pump starts automatically when the boiler temperature reaches 10°C. If the temperature drops further below 5°C, the burner also ignites in a way to protect the boiler from the effects deriving from freezing.

If the boiler is not used for a long period of time (over a year),

it is recommended to empty it following the procedures in chapters 8.16 and 8.17.

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7.15 - Automatic plant

lling (on request)

Normally the appliance is supplied with a manual cock for

lling the central heating plant. On request, the boiler can be manufactured with the automatic plant ll.

7.16 - Energy Saving

To reduce the consumption of display energy, it will switch off automatically after 5 minutes from the last operation performed. This function can be deactivated or the time

modied via parameter 2100 present in the “Installer menu”.

If the parameter is set at OFF, the display will remain on constantly.

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Parameter Description of the parameter M.U. 1001 Central heating supply temperature °C 1002 Domestic hot water temperature (or indirect water heater temperature, if present) °C 1003 No function / 1004 External temperature (visible when an external temperature sensor is installed) °C 1005 Central heating supply temperature (safety sensor) °C 1006 Fumes temperature °C 1007 Central heating return temperature °C 1008 Ionisation current uA 1009 Status of the pump inside the boiler ON/OFF 1010 Status of the central heating side diverter valve

(ON = in central heating mode; OFF = in domestic hot water mode)

ON/OFF

1011 Status of the central heating side diverter valve (ON = in D.H.W. mode; OFF = in central heating mode) ON/OFF 1012 Central heating supply temperature calculated via the external sensor °C 1013 Status of the room thermostat contact

(OPEN = no central heating request; CLOSED = presence of central heating request)

OPEN/CLO-

SED 1014 Fumes temperature (safety sensor) °C 1040 Current rotation speed of the fan rpm 1041 Fan rotation speed on ignition rpm 1042 Fan rotation speed in minimum power mode rpm 1043 Fan rotation speed in maximum power mode rpm 1051 Latest block condition recorded (Loc) (see chapter 7.19.1) / 1052 Latest error condition recorded (Err) (see chapter 7.19.2) / 1053 Number of times the burner has lost the ame n° 1055 Number of failed burner ignitions n° 1056 Number of hours worked in central heating mode h x 10 1057 Number of hours worked in domestic hot water mode h x 10 1058 Numero di giorni di lavoro del bruciatore days 1059 Interval of time between the last two blocking errors (Err)

1 value in minutes; 2 value in hours;

3 value in days; 4 value in weeks;

1060 Interval of time between the last two blocks (Loc)

1061 Current rotation speed of the domestic hot water turbine rpm 1062 Current domestic hot water ow rate l/min

7.17 - “User menu”

Press the RESET key for 2 seconds to access the “User

menu”. The visual display “M” in gure 7.1, starts to show

parameter 1001 to inform the use of the mode change.

Using the

and keys, scroll the parameters contained in the menu. Just press the RESET key again for 2 seconds to exit the menu. The parameters in this menu are display only and cannot be

modied via the same.

If no key is pressed for more than 60 seconds, the menu is exited automatically. The following parameters can be queried in this menu:

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7.18 - “Installer menu”

ATTENTION !!! The modication of these

parameters could cause the boiler, and therefore the plant, to malfunction. For this reason only a technician that has the awareness and in-depth knowledge of the appliances can modify them.

The boiler command and control board makes this parameter menu available to the technician, for the analysis of operation and adaptation of the boiler to the plant. Proceed as follows to enter the “Installer menu”:

1.- hold the RESET and

keys down simultaneously

for 5 seconds until the

2001 parameter is displayed.

The symbol

appears on the display to indicate the

entry into the “Installer menu”.

2.- the

and keys can be used inside the

menu to scroll the parameters:

3.- once the parameter of interest has been displayed, it

can be modied as follows:

a.- press the RESET key to access the parameter (the

visual display “N” in gure 7.1 will start to ash);

b.- modify the value of the parameter using the

and

keys;

c.- press the RESET key to conrm the data modied

and go back to the list of parameters;

4.- To exit the “Installer menu”, hold down the RESET key

for 5 seconds until the symbol

disappears from the

base of the display.

If no key is pressed for more than 5 minutes, the menu is

exited automatically.. Any data variation that is not conrmed

with the RESET key will be lost.

ATTENTION !!! Any variation to the

parameters must be noted in the “Customised values” column present in the following table in order to facilitate the eventual replacement of the command and control board.

The following parameters can be changed or queried in this menu:

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Parameter Description of the parameter U.M. Setting range

Factory

value

Customised values

2001 Central heating minimum power level % From 1 to 50 1

2002 Central heating maximum power level % From 1 to 100 100

2003 Central heating operating mode nn 00 = Central heating with room

thermostat 01 = Central heating with room thermostat and climatic adjustment 02 = Central heating with total climatic adjustment 03 = Permanent central heating

2004 Stand-by time after maximum differential sec From 0 to 30 10

2005 Post-circulation in central heating mode sec From 10 to 900 120

2010 Forcing of fan and burner / OFF = No forcing

FAN = Forcing of fan only to max speed LOu = Forcing of burner to minimum power Ign = Forcing of burner to ignition power HIgH = Forcing of burner to maximum power rEg = Forcing of the burner to the power adjusted in central heating mode (Par.2002)

OFF

2011 Forcing the pump / On = Pomp on

OFF = Pomp off

OFF

2012 Forcing of the domestic central heating side diverter valve / ON = in central heating mode;

OFF = in domestic hot water mode

OFF

2013 Forcing of the domestic hot water side diverter valve / ON = in domestic hot water mode;

OFF = in central heating mode

OFF

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2014 Icons test on the display. By pressing the RESET key, all of the

icons on the display light up. By pressing the RESET key again to display goes back to normal operation

/ / /

2020 Climatic adjustment: external temperature for central heating

switch-off

°C From 0 to 35 22

2021 Climatic adjustment: design external temperature (winter) °C From -20 to 5 -5

2022 Climatic adjustment: supply temperature corresponding to the

design external temperature (winter)

°C From 0 to 80 80

2023 Climatic adjustment: external spring-like temperature °C From 0 to 30 20

2024 Climatic adjustment: supply temperature corresponding to the

external spring-like temperature

°C From 0 to 40 40

2027 Temperature reduction by room thermostat opening °C From 1 to 50 10

2040 Climatic adjustment: central heating boost temperature °C From 0 to 20 0

2041 Climatic adjustment: central heating boost time min From 0 to 30 20

2042 Protection against frequent switch-on in central heating mode:

time

sec From 10 to 900 180

2043 Protection against frequent switch-on in central heating mode:

temperature differential

°C From 0 to 20 16

2060 Domestic hot water minimum power level % From 1 to 50 1

2061 Domestic hot water maximum power level % From 1 to 100 100

2062 Post-circulation in domestic hot water mode sec From 10 to 900 120

2063 Maximum time for lling indirect water heater min From 0 to 60 60 /

2064 Number of ow meter revs. for every litre of water rpm/lt From 0 to 5 3,2

2066 Delay in the detection of the instantaneous domestic hot water sec From 1 to 10 3

2067 Indirect water heater lling procedure / 0 = The indirect water heater

is lled for the time set in the

parameter 2063; 1 = OFF, the domestic hot water does not have priority over heating; 2 = ON, the domestic hot water always has priority over heating;

2080 Periodic maintenance meter

(after RESET, the meter automatically goes back to ON)

/ ON = Periodic maintenance

meter active; OFF = Periodic maintenance meter off; RESE = Meter reset

OFF

2081 Periodic maintenance meter: maintenance request time days From 0 to 1000 1000

2100 Energy saving display min OFF = display always on

From 1 to 30 = delay to switchoff in minutes.

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7.19 - Diagnostics

During normal appliance operation, the visual display “N”

in gure 7.1, continuously shows the working status of the

appliance via the following indications:

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Parameter Description of the parameter Display on visual display “N” in gure 7.1

AFro

Anti-freeze function active Boiler temperature (°C)

AttE

Boiler not in block but in attention mode Attention code (see chapter 7.19.3 for decoding)

FILL

Plant pressure too low, perform lling (see chapter 6.1.3) FILL

Fixed on = Domestic hot water service on but not active

On ashing = Domestic hot water service on and active

Domestic hot water temperature (°C)

Fixed on = =Central heating service on but not active

On ashing = =Central heating service on and active

Central heating temperature (°C)

Loc

Boiler blocked. To reset, press RESET. If the block occurs

frequently, contact a professionally qualied technician.

Block code (see chapter 7.19.1 for decode)

Err

Boiler in error mode. Functioning can only be restored by solving the cause of the anomaly. Contact a professionally

qualied technician

Error code (see chapter 7.19.2 for decode)

ALEg

Anti-legionella function running (see chapter 7.12). It will end on reaching the water temperature of 60°C inside the indirect water heater.

Indirect water heater temperature (°C)

SEr

Maintenance request for the boiler Appliance temperature (°C)

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7.19.1 - Diagnostics: blocks “Loc”

Block Description of block Checks Solutions

Loc 0 Internal memory error

E2prom at command board

Replace the command and control board.

Loc 1 No ame detection after

three successive ignition attempts.

Control: Supply gas pressure (see chapter 6.6), sparks on the ignition electrodes (see chapter

8.5);correct combustion agent air pressure (see chapter 6.7); 220 Vac electric power supply to the gas valve; electric resistance of the two gas valve coils of 0.88 Kohm and 6.59 Kohm

If the burner switches on and switches off at the end of the ignition attempt, check: that the ionisation current is at a value over 60 (follow the procedure in chapter 8.20)

If the supply pressure is not correct, operate upstream from the appliance to restore it; if the pressure of the combustion agent air is not correct, operate on the air intake/fumes exhaust circuit to eliminate any obstructions. If the current at the gas valve is not 230Vac, the command and control board must be replaced. If the electric resistance of the gas valve is not 0.88 Kohm and 6.59 Kohm, the valve must be replaced.

If the ionisation current is not over 60, the CO2 must be checked (follow chapter 6.8) and restore its correct value, check the ionisation electrode and replace it if necessary. Check the integrity of the ionisation current electric circuit cables.

Loc 2 Gas valve command relay

broken

Replace the command and control board.

Loc 3 I nter n al saf ety rel a y

failure at command board

Check the appliance earth. If the earth is good, replace the command and control

board.

Loc 4 Boiler in error mode for

more than 20 hours

Control the last error displayed in the board. Operate according to the last error displayed.

Loc 5 Fan out of speed for

more than 60 seconds

Control it is powered at 300 Vdc. If the fan is powered, it must be replaced, differently

replace the board.

Loc 6 Software error inside the

command board

Replace the command and control board.

Loc 7 Content of the memo-

ry E2prom inside the command board, not updated

Replace the command and control board.

Loc 8 Parameters inside

the E2prom memory, incorrect

Replace the command and control board.

Loc 9 Software error inside the

command board

Replace the command and control board.

Loc 10 Software error inside the

command board

Replace the command and control board.

Loc 11 Not applicable

Loc 12 Not applicable

Loc 13 The boiler has reached

95°C

Control that the pump functions. Restore water circulation or replace the command

and control board.

Loc 14 Fumes maximum tempe-

rature. To release the error,

contact a qualied after-

sales centre, which must move the switch “B” in

g. 6.5 and press the

RESET key. Then put the switch back in the original position.

Check there is no air in the central heating circuit; bleed the highest radiators;

Check the circulation pump operates correctly;

Measure the boiler efciency; it must correspond to

that declared in the technical features.

Bleed the air from the boiler and from the highest central heating elements with respect to the boiler.

If the pump does not operate, it must be replaced.

If the efciency does not correspond to the data at the

end of the manual, probably the primary heat exchanger is dirty from the fumes side or the water side.

Clean and check efciency again.

Loc 15 Software error inside the

command board

Replace the command and control board.

Loc 16 Software error inside the

command board

Replace the command and control board.

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Loc 17 Software error inside the

command board

Replace the command and control board.

Loc 18 Flame present 10

seconds after gas valve is closed

Replace the gas valve or the command and control board.

Loc 19 Flame present before

ignition

Replace the gas valve or the command and control board.

Loc 20 Flame lost three times Control: that the ionisation current is at a value over

60 (follow the procedure in chapter 8.20)

Controllare: che lo scarico dei fumi sia opportunamente protetto da ostruzioni causate da folate di vento

If the ionisation current is not over 60, the CO2 must be checked (follow chapter 6.8) and restore the correct value. Check the ionisation electrode and replace it if necessary. Check the integrity of the ionisation current electric circuit cables.

If the fumes exhaust is placed in a vertical wall it must be protected with a wind-proof grid. If the fumes exhaust is positioned on the roof, make sure that it is

not in an area of reux and that any windproof chimney pot is really efcient.

Loc 21 Not applicable

Loc 22 Not applicable

Loc 23 The two supply sensors

measure the different temperatures for more than 60 seconds.

Check that the electrical resistance of the two sensors match the graphics in chapter 8.22;

Check that the central heating circuit ow rate is not

too low;

If one of the two or both sensors do not have correct values, they must be replaced;

If the temperature difference between U1 and U8 is

greater than 30°C at maximum power and the ow rate of the central heating circuit is low, the ow rate

must be increased;

Loc 24 The two fumes sensors

measure the different temperatures for more than 60 seconds.

Check that the electrical resistance of the two fumes sensors match the graphics in chapter 8.22

If one of the two sensors does not match the double fumes sensor must be replaced

Loc 25 Too many plant lls in

one hour

Check the pressure switch calibration pressure. FILL must appear when the pressure drops below 0.6 bar and must disappear when the pressure rises above

1.5 bar; check that there are no water leaks from the central heating plant

If the pressure switch is not calibrated correctly, it must be replaced. If the plant has a leak it must be repaired.

Loc 26 Plant lling time too long Check the pressure switch calibration pressure. FILL

must appear when the pressure drops below 0.6 bar; check that there are no water leaks from the central heating plant

If the pressure switch is not calibrated correctly, it must be replaced. If the plant has a leak it must be repaired.

Loc 27 Software error inside the

command board

Replace the command and control board.

Loc 28 Software error inside the

command board

Replace the command and control board.

7 - USE

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7 - USE

7.19.2 - Diagnostics: errors “E”

Error Error Description Checks Solution

Err 30 Software error inside the

command board

Replace the command and control board.

Err 31 Software error inside the

command board

Replace the command and control board.

Err 32 Software error inside the

command board

Replace the command and control board.

Err 33 Software error inside the

command board

Replace the command and control board.

Err 34 Software error inside the

command board

Replace the command and control board.

Err 35 The supply temperature

exceeds 110°C with the gas valve closed

Check that the electrical resistance of the two supply sensors match the graphics in chapter 8.22.

Check that the gas valve closes the gas correctly when the burner switches off.

If one of the two sensors does not match, the double supply sensor must be replaced.

The gas valve must be replaced if it does not close correctly.

Err 36 Software error inside the

command board

Replace the command and control board.

Err 37 Software error inside the

command board

Replace the command and control board.

Err 38 Software error inside the

command board

Replace the command and control board.

Err 39 Software error inside the

command board

Replace the command and control board.

Err 40 Software error inside the

command board

Replace the command and control board.

Err 41 Software error inside the

command board

Replace the command and control board.

Err 42 Software error inside the

command board

Replace the command and control board.

Err 43 Software error inside the

command board

Replace the command and control board.

Err 44 Flame detected in a

moment when it should not be present

Replace the gas valve

Err 45 Central heating water

low pressure

Check the pressure switch calibration pressure. FILL must appear when the pressure drops below 0.6 bar; check that there are no water leaks from the central heating plant.

If the pressure switch is not calibrated correctly, it must be replaced. If the plant has a leak it must be repaired.

Err 46 Central heating water

pressure sensor error

Check the pressure switch calibration pressure. FILL must appear when the pressure drops below 0.6 bar; check that there are no water leaks from the central heating plant.

If the pressure switch is not calibrated correctly, it must be replaced. If the plant has a leak it must be repaired.

Err 47 Not applicable

Err 48 Software error inside the

command board

Replace the command and control board.

Err 49 Return sensor circuit

(1007) open

Check that the electric resistance of the sensor matches the graphics in chapter 8.22. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board.

Err 50 Supply sensor circuit 1

(1001) open

Check that the electric resistance of the sensor matches the graphics in chapter 8.22. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board.

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7 - USE

Err 51 Supply sensor circuit 2

(1005) open

Check that the electric resistance of the sensor matches the graphics in chapter 8.22. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board.

Err 52 Domestic hot water inlet

sensor 2 circuit (1002) open

Check that the electric resistance of the sensor matches the graphics in chapter 8.22. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board.

Err 53 Fumes 1 sensor circuit

(1006) open

Check that the electrical resistance of the fumes sensor 1006 matches the graphics in chapter 8.22

Check that the wires between the board and the double fumes sensor are connected correctly

If the sensor does not match, the double fumes sensor must be replaced.

If the wires are not connected correctly, the connections must be restored.

Err 54 Fumes 2 sensor circuit

(1014) open

Check that the electrical resistance of the fumes sensor 1014 matches the graphics in chapter 8.22

Check that the wires between the board and the double fumes sensor are connected correctly

If the sensor does not match, the double fumes sensor must be replaced.

If the wires are not connected correctly, the connections must be restored

Err 55 Not applicable

Err 56 Return sensor circuit

(1007) in short circuit condition

Check that the electric resistance of the sensor matches the graphics in chapter 8.22. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board.

Err 57 Supply sensor circuit 1

(1001) in short circuit condition

Check that the electric resistance of the sensor matches the graphics in chapter 8.22. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board.

Err 58 Supply sensor circuit 2

(1005) in short circuit condition

Check that the electric resistance of the sensor matches the graphics in chapter 8.22. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board..

Err 59 Domestic hot water inlet

sensor circuit (1002) in short circuit condition

Check that the electric resistance of the sensor matches the graphics in chapter 8.22. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board.

Err 60 Fumes 1 sensor circuit

(1006) in short circuit condition

Check that the electrical resistance of the fumes sensor 1006 matches the graphics in chapter 8.22

Check that the wires between the board and the double fumes sensor are connected correctly

If the sensor does not match, the double fumes sensor must be replaced

If the wires are not connected correctly, the connections must be restored

Err 61 Fumes 2 sensor circuit

(1014) in short circuit condition

Check that the electrical resistance of the fumes sensor 1014 matches the graphics in chapter 8.22

Check that the wires between the board and the double fumes sensor are connected correctly

If the sensor does not match, the double fumes sensor must be replaced

If the wires are not connected correctly, the connections must be restored

Err 62 External temperature

sensor circuit (1004) in short circuit condition

Check that the electric resistance of the sensor matches the graphics in chapter 8.23. Check the electric cables for connection between the sensor and the command board.

If the electric resistance does not match, replace it. The electric circuit must be repaired if it is damaged. Without either of the two previous cases, replace the command and control board.

Err 63 RESET key pressed too

many times in a very brief period

7.19.3 - Diagnostics: alarms “AttE”

Alarm Description of the alarm Checks Solutions

AttE 65 Central heating plant

pressure too low for more than 10 minutes

Check the pressure switch calibration pressure. FILL musty appear when the pressure drops below 0.6 bar; check that there are no water leaks from the central heating plant.

If the pressure switch is not calibrated correctly, it must be replaced. If the plant has a leak it must be repaired.

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8.1 - General recommendations

It is recommended to perform regular yearly maintenance of the central heating plant for the following reasons:

- to maintain high efciency of the appliance and therefore save fuel;

- to maintain a high level of safety;

- to maintain the level of environmental compatibility of the

combustion high;

In order to maintain the frequency of maintenance, there is a parameter present 2080 in the installer menu (see

chapter 7.18), which is used to activate the maintenance call (Service) along with the parameter 2081 which is

used to set the operating days that must pass between one call and the next.

The control system identies the operating days, checking

the burner activity time. Proceed as follows to activate the call service:

1.- access the Installer menu (see chapter 7.18) and set

parameter 2080 at 0n;

2.- access parameter 2081 and set the boiler operating days which must pass between one call and the next.

The call will be completed with SEr on the display. To remove the wording SEr and renew the call period,

operate as follows:

1.- access the “Installer menu”;

2.- access the parameter 2080, set it on rESE and press the RESET key.

3.- exit the Installer menu by pressing the RESET key for 5 seconds.

The call time is now renewed and SEr appears on the display.

ATTENTION !!! Appliance maintenance must

only be performed by a professionally qualied

technician.

ATTENTION !!! Before every maintenance

operation, disconnect the appliance from the electric power supply, using the relevant switch in the vicinity.

ATTENTION !!! Close the gas cock before any

maintenance operation

8 - MAINTENANCE

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Figure 8.1 - removing the casing and opening of command board

8.2 - Removing the casing and

access to internal components

Proceed as follows to remove the casing (refer to gure

8.1):

1.- pull the lower cover “A” towards the front for approx. 10mm

2.- push the lower cover “A” downwards;

3.- loosen the screws “H”;

4.- pull the lower part of the front-piece “B” towards the front and then slide it out upwards until it is released from the

guides “C”;

To access the command and control board:

1.- turn the command board “D” towards the front;

2.- open the commands board “D” by operating on closure

“G”;

To access the electric connections board:

1.- turn the command board “D” towards the front;

2.- slide lid “E” out by operating on the “F” closing aps;

020002.01.018

8 - MAINTENANCE

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8 - MAINTENANCE

8.3 - Removing the burner fan unit

Proceed as follows to remove the burner fan unit (refer to

gure 8.2 when not differently specied):

1.- access the internal components following chapter 8.2;

2.- remove the air manifold (detail “C” in gure 6.2) rotating

it towards the outside of the boiler and then pulling it

towards the right (see gure 6.2);

3.- unscrew nut “C” from the valve “D”;

4.- disconnect the cables “B” and the detection cable from the ignition and detection electrodes (details “12”, “53”

and “54” of gure 3.1);

5.- unscrew the four nuts “E”;

6.- extract the group “F” as per gure;

Figure 8.2 - Removing the burner fan unit

020002.01.024

8.4 - Cleaning the burner and the fumes side primary heat exchanger

To correctly clean the burner and body of the heat

exchanger (fumes side), proceed as follows (refer to gure

8.2 when not differently specied):

1.- access the internal components following chapter 8.2;

2.- remove the burner unit following chapter 8.3;

4.- pass a cylindrical brush with plastic bristles inside the combustion chamber

5.- use a suction device to remove the unburned residues

present inside the combustion chamber;

6.- use the same suction device on the surfaces of the

burner and around the electrodes;

7.- re-mount the components in reverse order;

8.- open the gas cock;

9.- restore the electric power supply.

10.- check that there are no gas leaks between the joints

removed;

ATTENTION !!! Perform the leak test using a soap

and water only. The use of naked ames is prohibited.

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8 - MAINTENANCE

Figure 8.3 - positioning the electrodes on the burner

Figure 8.4 - Access to the expansion tank

020002.01.025

8.5 - Correct positioning of the

ignition and ionising electrodes

For good working order of the appliance, it is indispensable

that the electrodes are positioned correctly (refer to gure

8.3):

- the distance between the ignition electrodes “A” and “B”,

must be between 2.0 and 2.5 mm;

- the distance between the ignition electrodes from the burner

surface must be between 5 and 5.5 mm;

- the distance of the ionisation electrode from the surface of the burner must be between 5.5 and 6.5 mm.

8.6 - Controlling the expansion tank

The expansion tank is positioned in the left side of the boiler.

Check the pre-ll pressure of the expansion vessel. It must

be at 1 bar. If the pressure is lower, restore it, allowing the water to evacuate from one of the two central heating drain

cocks (details “A” and “B” in gure 8.16).

If the replacement of the tan becomes indispensable,

proceed as follows to remove it (refer to gure 8.4 when not differently specied):

1.- access the boiler internal components following chapter

8.2;

2.- empty the central heating circuit, following the procedure

in chapter 8.16;

3.- remove the screw “B”;

4.- loosen the tting “C”;

5.- extract the expansion tank “D” towards the front.

6 - Replace the tank.

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8.7 - Cleaning the condensate

conveyor siphon

For correct cleaning of the collection siphon and the conveying of the condensate produced by combustion,

operate as follows (refer to the gures 8.5, 8.6 and 8.7):

1.- with the boiler on, open a domestic hot water cock to maximum in a way that the burner is at maximum power and the level of liquid present inside the siphon tank “D”

lowers (see gure 8.6);

2.- access the internal components following chapter 8.2;

3 - remove the fan burner unit following chapter 8.3;

4 - cover the electric plant and pump unit with a cloth

to protect them from any residues of water inside the siphon to be removed.

5.- slide the support “C” outwards from the holding support;

6.- slide the tank “D” downwards, paying attention to the fact that it is full of condensate water and this could

escape;

7.- extract the siphon outwards (see gure 8.6) paying

attention to disconnect the collection pipes of the water coming from the upper part of the appliance and from the air vent valve.

8.- clean the decanting tank “D”;

9.- re-mount everything in reverse order, paying attention to the gasket “E”, which is put back in the relevant seat and

that terminal “G” is introduced correctly in the seat “H”;

10.- restore the level of liquid inside the siphon following the procedure in chapter 6.1.2.

Figure 8.6 - Removal of the condensate collection siphon

020002.01.027

02002.01.029

Figure 8.7 - Condensate collection siphon

020002.01.030

8 - MAINTENANCE

Figure 8.5 - Removal of the condensate collection siphon

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8.8 - Removing the air vent valve

Refer to Figure 8.8 and proceed as follows:

1.- empty the central heating circuit, following the procedure

in chapter 8.16;

2.- access the internal components of the appliance

following chapter 8.2;

3.- remove the pipe “A” from the air vent valve “B”;

4.- slide the drive bar “C” towards the front;

5.- slide the air vent valve “B” upwards and extract it

8.9 - Replacing the pump motor

If the circulation pump must be replaced, operate as follows

(refer to gure 8.9)

1.- empty the central heating circuit, following the procedure

in chapter 8.16;

2.- access the internal components of the appliance

following chapter 8.2;

3.- disconnect the electric wires from the pump body.

4.- remove the screws “B”;

5.- extract the pump “C” outwards;

8.10 - Removing the central

heating circuit pressure sensor

Proceed as follows, making reference to gure 8.10:

1.- empty the central heating circuit, following the procedure

in chapter 8.16;

2.- access the internal components of the appliance

following chapter 8.2;

3.- extract the drive bar “A” towards the front;

4.- slide the pressure sensor “B” upwards and extract it.

Figure 8.9 - Replacing the pump motor

020002.01.026

8 - MAINTENANCE

020002.01.035

Figure 8.8 - Removing the air vent valve

Figure 8.10 - Removing the central heating circuit pressure sensor

020002.01.036

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8 - MAINTENANCE

8.11 - Removing the diverter

valve servo-motor

Proceed as follows, making reference to gure 8.11:

1.- access the internal components of the appliance

following chapter 8.2;

2.- remove the air manifold (detail “C” in gure 6.2) rotating

it towards the outside of the boiler and then pulling it

towards the right (see gure 6.2);

3.- slide the drive bar “A” in 8.11 out;

4.- extract the servo-motor “B” in gure 8.11 upwards.

8.12 - Removing the diverter valve

The diverter valve (detail “47” in gure 3.1) switches over the ow of water produced from the primary heat

exchanger to the central heating circuit or to the secondary heat exchanger for the production of d.h.w. If it has to be

replaced, proceed as follows (refer to gure 8.12):

1.- remove the diverter valve servo-motor following chapter

8.11;

2.- empty the central heating circuit, following the procedure

in chapter 8.16;

3.- slide the drive bar “D” out;

4.- slide the diverter valve “E” upwards.

8.13 - Removing the ow meter

The ow meter is used to measure the water ow rate of

the domestic hot water. If it has to be replaced, proceed as

follows (refer to gure 8.13):

1.- empty the domestic hot water circuit, following the

procedure in chapter 8.17;

2.- access the internal components of the appliance

following chapter 8.2;

3.- remove the spring “A”;

4.- extract the ow meter “B”, paying attention to direction for the correct re-positioning at the end of maintenance;

5.- clean the lter “C” making sure to extract it from the body of the ow meter “B” as indicated in the gure;

6.- wash the lter and re-mount everything in reverse order;

7.- during remounting, make sure the ow meter is positioned correctly (step highlighted in point 4).

ATTENTION ! !! This filter is inten de d as a

precaution only. A lter with greater capacity must be

installed outside the boiler, on the cold water inlet, as

specied in chapter 5.6.

Figure 8.11 - Removing the servo-motor

Figure 8.12 - Removing supply and return ttings

Figure 8.13 - Removing the ow meter

020002.01.031

020002.01.032

020002.01.033

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8.14 - Removing the safety valve

The safety valve (detail “D” in gure 8.14) protects the

boiler from over pressures. If it has to be replaced, proceed

as follows (refer to gure 8.14):

1.- empty the central heating circuit, following the procedure

in chapter 8.16;

2.- access the internal components of the appliance

following chapter 8.2;

3.- disconnect the drain pipe “A”, loosening the sealing

spring “B”;

4.- slide the drive bar “C” towards the front;

5.- extract the safety valve “D” upwards;

8.15 - Secondary heat exchanger

for the production of d.h.w.

The production of d.h.w. is delegated to the secondary heat

exchanger (detail “5” in gure 3.1). If this heat exchanger is no longer efcient with the passing of time, it may require cleaning

or replacement. To remove the secondary heat exchanger,

proceed as follows (refer to gure 8.15):

1.- empty the central heating circuit and the domestic hot water circuit, respectively following chapters 8.16 and

8.17;

2.- access the internal components as per chapter 8.2;

3.- remove the burner fan unit following chapter 8.3;

4.- loosen the bolts “A”;

5.- move the secondary heat exchanger “B” backwards and

turn it as per gure;

6.- extract the heat exchanger “B” towards the front of the boiler.

Figure 8.14 - Removing the safety valve

020002.01.034

Figure 8.15 - Removing the secondary heat exchanger

8 - MAINTENANCE

020002.01.037

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Figure 8.16 - Central heating circuit drain cocks

8.16 - Emptying the appliance on the domestic hot water side

To empty the appliance from the central heating side, proceed as follows:

1.- generate a central heating request;

2.- set the central heating temperature at the lowest value possible, with the purpose of cooling the water inside the

boiler;

3.- switch the boiler off;

4.- access the internal components following chapter 8.2;

5.- connect a exible hose to the drain cocks “A” and “B”(see gure 8.16) and convey it onto the drain of a washbasin or similar;

6.- open the drain cocks “A” and “B” (see direction of

rotation in gure 8.17);

7.- open the central heating elements bleed valves. Start from the highest central heating elements and continue with the lowest.

8.- once all of the water has been evacuated, close all of the heating element vent valves and the drain cocks “A”

and “B” in gure 8.16.

ATTENTION !!! It is prohibited to recover and/

or re-use the water evacuated from the central heating circuit for any purpose; this could be polluted.

8.17 - Emptying the appliance on

the domestic hot water side

To empty the appliance from the domestic hot water side, proceed as follows:

1.- close the main cold water supply cock in the house;

2.- open all hot and cold water taps around the home;

3.- make sure that at least one of these is at a height below the level of the boiler.

8.18 - Fan

Switch-on of the fan only can be generated, accessing the parameter 2010 situated inside the “Installer menu” (see chapter 7.18) and set it on FAn. To go back to normal operating conditions, set parameter 2010 again to 0FF.

8.19 - Minimum and maximum power

Appliance operation can be forced to its own minimum, maximum, adjusted or ignition power. Proceed as follows:

1.- make sure that any cocks and thermostatic valves

downstream from the central heating circuit are open;

ATTENTION !!! During forcing of the delivery

2.- access parameter 2010 found in the “installer menu”

(see chapter 7.18);

3.- set the parameter 2010 at the following value:

a) LOu to force the boiler to minimum power; b) Ign to force the boiler to ignition power; c) HIgH to force the boiler to maximum power; d) rEg to force the boiler to the maximum central heating

power, as adjusted (Range Rated) in chapter 6.9,

parameter 2002.

4.- To end forcing, take the parameter 2010 to the0FF e

premere il tasto RESET.

ATTENTION !!! If during forcing, the power

supplied by the boiler is much higher than the power absorbed by the plant, the boiler switches off continuously to reach the maximum temperature allowed (93°C).

8 - MAINTENANCE

020002.01.038

Figure 8.17 - Cocks opening and closing direction A = Open B = Closed

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8.20 - Checking the ionisation current

In any operating status, also during verications of minimum

and maximum power stated in chapter 8.19, the ionisation current value can be consulted on parameter 1008 present

in the “User menu” (chapter 7.17). This value must be between

1.5 and 3 uA (microampere) at minimum power and between

5 and 8 uA at maximum power.

8.21 - Checking combustion efciency

On the basis of national laws regarding gas appliances, the

combustion efciency must be checked periodically;

To do this, operate exactly as stated in chapter 6.8 and

check, along with the CO2, also the combustion efciency,

which must be over 96%.

Figure 8.18 - Water sensors curve

Figure 8.19 - External temperature sensor curve

8 - MAINTENANCE

8.22 - Water temperature measurement sensors

The temperature sensors are positioned on the boiler’s exchanger body. The electric resistance existing between the two contacts of the sensor, must correspond with that

stated in gure 8.18.

The temperature sensors are: 1001, 1002, 1003,

1005, 1006, 1007 and 1014, the positioning of

which can be veried in gure 3.1.

8.23 - External temperature sensor

On request, the external temperature sensor can be connected to the boiler 1004 (see chapter 5.14.4). The

electric resistance existing between the two contacts of the

sensor, must correspond with that stated in gure 8.19.

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8.24 - Operational wiring diagram

Figure 8.20 - Operational wiring diagram

ATTENTION !!! To consult

the wiring diagram correctly, references K are given followed by a number (see example above) to identify the correct follow-on of the cables in the next page.

8 - MAINTENANCE

1001 - Boiler body sensor 1 1002 - DHW outlet sensor

1002 (SB) - Indirect water heater sensor

1004 - External temperature sensor 1005 - Boiler body sensor 2 1006 - Fumes sensor 1007 - Return sensor

1014 - Flue gas sensor (redundant) CM - Boiler control unit and ame control

DSP - Display

DSPX - Remote control (on request)

EA - Ignition electrode ER - Detection electrode

F (Digital) - Digital fan F (BCU) - 5A fuse F1 (SDC) - 1.6A power supply fuse

GP - Circulation pump GS - Spark generator

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8 - MAINTENANCE

IG - Master switch J1 - 6 pin Molex connector J12- 6 pin Molex connector J2 - 4 pin Molex connector J26- 4 pin Molex connector J3 - 12 pin Molex connector J4 - 4 pin Stelvio connector J5 - 16 pin Molex connector J6 - 14 pin Molex connector J7- 10 pin Molex connector J9- 4 pin Molex connector PB - Indirect water heater pump PS - Central heating circuit pressure sensor SDC- Connection board TA- Room thermostat

TU - Domestic hot water ow meter

V3V- domestic hot water/central heating diverter valve VG1- Sit Gas Valve

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8.25 - Multi-wire wiring diagram

Figure 8.21 - Multi-wire wiring diagram

Key - see key gure 8.20

8 - MAINTENANCE

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8 - MAINTENANCE

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MYDENS TECHNICAL DATA M.U. 15 24 34

Type (Type of fumes exhaust/air intake) B23;C13;C33;C43;C53;C63;C83

Category II2H3P II2H3P II2H3P

CE type certicate (PIN) 0694CN6126 0694CN6126 0694CN6126

Central heating max. heat input “Q” kW 14,0 25,5 34,8

Domestic hot water max. heat input kW / 25,5 34,8

Central heating min. heat input kW 3,2 3,2 4,4

Domestic hot water minimum heat input kW / 3,2 4,4

Central heating max. useful heat output (80/60) “P” kW 13,8 25,0 34,1

Efciency at 100% load (80/60) % 98 98 98

Min. useful heat output (80/60) kW 3,17 3,17 4,35

Efciency at min. useful heat output (80/60) % 99 99 99

Central heating max. useful heat output (50/30) kW 15,1 27,5 37,6

Efciency at central heating max. useful heat output (50/30) % 108 108 108

Min. useful heat output (50/30) kW 3,49 3,49 4,8

Efciency at min. useful heat output (50/30) % 109 109 109

Central heating max. useful heat output (40/30) kW 15,9 27,8 37,9

Efciency at central heating max. useful heat output (40/30) % 109 109 109

Min. useful heat output (40/30) kW 3,5 3,5 4,84

Efciency at min. useful heat output (40/30) % 110 110 110

Efciency at 30% of the load % 110 110 110

Efciency certicate (92/42/EEC) stelle

Losses at the chimney burner on (80/60) % 1,5 1,5 1,5

Losses at the chimney burner on at minimum power % 0,5 0,5 0,5

Losses at the chimney burner off % 0,1 0,1 0,1

Losses at the casing burner on % 0,5 0,5 0,5

Losses at the casing burner off % 0,1 0,1 0,1

Losses at zero load % 0,3 0,3 0,3

Generator average test temperature (80/60) °C 70 70 70

Generator average test temperature (40/30) °C 35 35 35

Return temperature in test conditions (80/60) °C 60 60 60

Return temperature in test conditions (40/30) °C 30 30 30

Gas ow rate

Nat Gas m

/h 1,48 2,70 3,68

LP Gas Kg/h 1,09 1,98 2,70

Gas supply pressure

Nat Gas mbar 20 20 20

LP Gas mbar 37 37 37

Gas supply minimum pressure

Nat Gas mbar 15 15 15

LP Gas mbar 25 25 25

Gas supply maximum pressure

Nat Gas mbar 27 27 27

LP Gas mbar 45 45 45

Combustion agent air pressure

Nat Gas mbar 8,2 13,2 12,3

LP Gas mbar 8,6 13,8 11,2

Primary heat exchanger with shared water circulation pipes lt 1,5 1,5 1,7

Weight of the heat exchanger with stainless steel water pipes kg 8 8 9,2

Secondary heat exchanger water content lt / 0,5 0,5

Domestic hot water useful heat output kW / 27,5 37,6

D.h.w. minimum ow rate l/min / 2 2

Instantaneous d.h.w. production (dt 30°C) l/min / 13,1 18

Instantaneous d.h.w. adjustment range °C / 40-60 40-60

D.h.w. with indirect water heater adjustment range °C 40-70 40-70 40-70

Design temperature °C 95 95 95

Maximum central heating temperature °C 80 80 80

Minimum central heating temperature °C 20 20 20

9 - TECHNICAL DATA

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MYDENS

COSMOGAS

MYDENS TECHNICAL DATA M.U. 15 24 34

Central heating maximum pressure “PMS” bar 3 3 3

Central heating minimum pressure bar 0,5 0,5 0,5

D.h.w. circuit maximum pressure bar / 7 7

D.h.w. minimum pressure bar / 0,3 0,3

Expansion tank pre-load pressure bar 1 1 1

Expansion tank capacity lt 10 10 10

Rated power supply voltage V 230 230 230

Rated power supply frequency Hz 50 50 50

Absorbed electric power W 120 120 120

Electric protection rating IPX4D IPX4D IPX4D

Elec. pow. of the generator aux. positioned before rebox W 70 70 70

Elec. pow. of the generator aux. at min.pow. positioned before rebox W 30 30 30

Elec. pow. of the generator aux. positioned after rebox W 50 50 50

Elec. pow. of the generator aux. at min.pow. positioned after rebox W 50 50 50

Power absorbed by the auxiliaries at rated power W 50 50 50

Power absorbed by the auxiliaries at intermediate load W 20 20 20

Power absorbed by the auxiliaries at zero load W 1 1 1

Electric power absorbed by the pump W 50 50 50

Fumes pipe diameter (split) mm 80 o 60 80 o 60 80 o 60

Fumes pipe max. length (split) (80) m 40 40 25

Fumes pipe max. length (split) (60) m 15 15 10

Fumes pipe diameter (coaxial) mm 60/100 60/100 60/100

Fumes pipe max. length (coaxial) m 10 10 10

Equivalent length of a bend m Curva a 45° = 0.5m, curva a 90° =1m

Weighted CO (0% O2 with nat Gas) ppm 1 8 15

Weighted NOx (0% O2 with nat Gas) (class 5 EN 483 and 297) ppm 11 13 17

CO2 (%) at minimum/maximum power Nat Gas % 8,5/9,0 8,5/9,0 8,5/9,0

CO2 (%) at minimum/maximum power LP Gas % 10/10,5 10/10,5 10/10,5

O2 (%) at minimum/maximum power Nat Gas % 5,5/4,8 5,5/4,8 5,5/4,8

O2 (%) at minimum/maximum power LP Gas % 5,6/4,8 5,6/4,8 5,6/4,8

Maximum recirculation of fumes allowed in the event of wind % 10 10 10

Fumes maximum temperature at boiler outlet °C 75 75 75

Fumes minimum temperature at boiler outlet °C 30 30 30

Mass ow of the fumes kg/h 25,4 42,3 59

Mass ow of the fumes at minimum power kg/h 5,3 5,3 7,2

Head available at exhaust Pa 60 60 60

Maximum temperature of the combustion agent air °C 50 50 50

Maximum CO2 content in the combustion agent air % 0,9 0,9 0,9

Fumes maximum temperature for overheating °C 90 90 90

Max. negative pressure allowed in the fumes exhaust/intake system Pa 60 60 60

Condensate maximum ow rate l/h 1,9 3,2 4,3

Condensate average acidity PH 4 4 4

Operating environment temperature °C 0 ; +50 0 ; +50 0 ; +50

Weight of the boiler

B kg 36 36 38

C kg 34 34 36

P kg / 36 38

9 - TECHNICAL DATA

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MYDENS

COSMOGAS

10 - COMMAND MENU DIAGRAM

Symbol Description

Press and release the RESET key

Hold the reset key down for a time in seconds, indicated by the number (2)

Hold the reset key down for a time in seconds, indicated by the number (5)

Hold down the RESET and key simultaneously for a time in seconds, indicated by the number

Press and release the key

Parameters that can be displayed in the normal conditions

(see chapter 7.19)

User menu parameters

(see chapter 7.17)

Installer menu parameters

(see chapter 7.18)

Installer menu parameters

(see chapter 7.18)

User menu access

(see chapter 7.17)

Installer menu access

(see chapter 7.18)

Return to normal operation

Figure 10.1 - Command menu diagram

Key of gure 10.1

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MYDENS

COSMOGAS

ATTENTION !!!

The modication of these parameters could cause the appliance, and therefore the plant, to malfunction.

For this reason only a technician that has the awareness and in-depth knowledge of the appliances can modify them.

To access this menu, introduce the bridge in the board as stated in gure 6.5 detail “A”.

11 - MENU FORCED BY INTERNAL ELECTRIC BRIDGE

Parameter Description of the parameter M.U. Setting range

Factory value

Customised

value

3002 Selection type From 50 to 55 See Figure 6.7

3012

Domestic hot water operating mode

0 = No domestic hot water; 1 = Indirect water heater with temperature sensor; 2 = Indirect water heater with thermostat;

3 = Instantaneous with ow switch;

4 = Microaccumulation with two sensors; 5 = Instantaneous with turbine;

model “P” = 5 model “B” = 1 model “C” = 0

3013 Plant ll automatic valve /

0 = Valve disabled; 2 = Valvola abilitata;

3014

Instantaneous domestic hot water pre-heat

OFF = No pre-heat ON = with pre-heat

OFF

3015

Maximum central heating temperature

°C From 20 to 90 80

3016

Minimum central heating temperature

°C From 20 to 90 30

3020

Domestic hot water ow rate

sensor

0 = B; (MYDENS 15, 24 e 34) 1 = DN 8; 2 = DN 10; 3 = DN 15; 4 = DN 20; 5 = DN 25;

3021 2nd Fumes sensor (1014) /

0 = Disabled; 1 = Enabled; 2 = Enabled with fumes exhaust anticlosure pressure switch;

3022

Central heating minimum pressure

bar OFF... 0,3 to 5,1; 0,5

3033 Modulating pump /

0 = Disabled; 1 = Enabled; From 4 to 10 = Fixed speeds from 40% to 100%;

3034 Modulating pump delta T target °C From 5 to 40 15 3035 No function / / / 3036 No function / / / 3052 No function / / /

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MYDENS

COSMOGAS

The undersigned COSMOGAS S.r.L., with Registered Ofce in via L. Da Vincin° 16 - 47014 Meldola (FC) ITALY,

DECLARES

under its own responsibility that the product:

subject of this declaration, is in compliance with the model described in the

Type examination certicate , whose reference is given in the table in

chapter 9 under “CE type certicate (PIN)” and meeting that required by the

Directives: Gas Appliances, (2009/142/CE former 90/396/CEE), Efciencys,

(92/42/CEE), Low Voltage, (2006/95/CE), Electromagnetic Compatibility,

(2004/108/CEE).

(the warranty number corresponds to the serial number)

This declaration is issued for that established by the above-mentioned Directives.

Meldola (FC) ITALY, (Date of manufacture).

DATE OF MANUFACTURE

WARRANTY N°

GAS BOILER MODEL

12 - CE DECLARATION OF CONFORMITY

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MYDENS

COSMOGAS

13 - WARRANTY

13.1 - General warranty conditions

All COSMOGAS products are guaranteed against material

aws and manufacturing defects for 24 months from the date of commissioning, COSMOGAS also extends the warranty to:

COPPER TUBE, CRR e CRV Heat exchanger guaranteed up to 5 years;

PRE-MIXED BURNERS guaranteed up to 10 years;

BRUCIATORI ATMOSFERICI guaranteed up to 15 years.

This warranty extension will only be valid if COSMOGAS

has received the warranty card, lled-in completely, which

will certify the date of commissioning. Within the abovementioned term COSMOGAS commits to repairing or replacing the faulty construction parts and which will be acknowledged as such with exclusion of normal deterioration due to operations. The extension of the warranty exclusively covers the cost of the spare part. All other accessory costs are excluded, such as: labour, transfer costs and expenses for transporting material. The warranty does not extend to the recasting of the damage, of any nature, that has happened to persons or property. The faulty material replaced under warranty is the property of COSMOGAS and must be returned to our establishment, without further damage, within 30 days from replacement. All COSMOGAS products are encumbered by the title retention agreement, until the appliance sold have been paid in full.

13.2 - Instructions for lling-

in the warranty card

1. - Have your installer put his stamp on the warranty

certicate.

2. - Always request the intervention of our authorised technician for commissioning and to validate the

warranty;

To validate the warranty it will be the technician perform all the controls of the appliance in accordance with instructions contained in this manual and the regulations in force national and / or local.

The list authorised technicians is found attached to the instructions manual or can be found in the yellow pages under .

ATTENZIONE !!! - The authorized technician, performed

the rst ignition as mentioned above, must ll out the warranty card in all elds. In the top side, that will be sent to

COSMOGAS for the validation of the warranty, and in the

bottom side (to be cut) that will be given to the nal user as a validation test (the coupon below shows the identication data of the product and the date of rst ignition which is the beginning of warranty period). We recommend you to keep

the coupon along with the user manual for easy reference.

13.3 - Limits of the warranty

The warranty is not valid:

- if the appliance is installed by non-qualied staff;

- if the appliance is installed in a way that is not in compliance with the COSMOGAS instructions and/or that

established by the current national and/local regulations;

- whenever the plant is not run/services in compliance with the instructions and/or the current national and local

regulations;

- whenever the product has damage caused by changes in

voltage;

- whenever the product has damaged caused by the use of excessively hard water, or which is too acid or too

oxygenated;

- whenever the product has failures caused by heat shocks,

abnormalities of chimneys and/or exhaust and intake pipes;

- whenever the product has anomalies not depending on

COSMOGAS;

- whenever the appliances have been tampered with for adaptation, repairs or replacement with non-original spare

parts;

- whenever repairs are performed by unauthorised staff;

- Whenever the warranty certicate is not sent to

COSMOGAS within 15 gg from the date of commissioning.

COSMOGAS does not assume any responsibility for

any accident that may occur or be caused by the user, precluding any compensation that does not concern boiler parts recognised as defective manufacturing.

Any dispute is the jurisdiction of the Forlì Law Court, ITALY.

Page 74

Page 75

Page 76

COSMOGAS s.r.l.

Via L. da Vinci 16 - 47014

MELDOLA (FC) ITALY

info@cosmogas.com

www.cosmogas.com

COSMOGAS MYDENS Installation, Use And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual