COSMOGAS MYDENS 50 Instructions For Installation, Use And Maintenance Manual
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COSMOGAS MYDENS 50 Instructions For Installation, Use And Maintenance Manual

Gas wall-mounted condensing boiler
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GAS WALL-MOUNTED
CONDENSING BOILER
INSTALLATION, USE
AND MAINTENANCE
MANUAL
MYDENS 50
MYDENS 60
62403579 - R04 14-07-2021_UK - INGHILTERRA - COSMOGAS

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  • Page 1 INSTALLATION, USE AND MAINTENANCE MANUAL MYDENS 50 GAS WALL-MOUNTED CONDENSING BOILER MYDENS 60 62403579 - R04 14-07-2021_UK - INGHILTERRA - COSMOGAS...

  • Page 2: Table Of Contents

    6.1.2 - Filling the condensate drain siphon ......................36 6.1.3 - Filling the central heating system ......................36 6.2 - General recommendations regarding the gas supply .................... 36 6.3 - Type of gas for which the appliance is set......................37 MYDENS 50-60 COSMOGAS...
  • Page 3 8.14 - Removing the central heating circuit pressure sensor ..................72 8.15 - Emptying the boiler .............................. 73 8.16 - Minimum and maximum power ........................... 73 8.17 - Checking the ionisation current ..........................74 8.18 - Checking combustion efficiency ........................... 74 MYDENS 50-60 COSMOGAS...
  • Page 4 8.20 - Outdoor temperature sensor ..........................75 8.21 - Wiring diagram ..............................76 9 - TECHNICAL DATA ............................78 10 - PRODUCT FICHE ............................80 11 - COMMAND MENU DIAGRAM ........................81 12 - NOTE ................................82 13 - EU DECLARATION OF COMPLIANCE ......................83 MYDENS 50-60 COSMOGAS...

  • Page 5: General Safety Warnings

    Call the and/or installer. Fire Service if the former are not available.  Any options or kits added later must be original Cosmogas products. If you can smell combustion products  1. - Switch the appliance off.

  • Page 6: General Information

    2.1 - Presentation Congratulations! You have purchased one of the best products on the market. Each individual part is proudly designed, manufactured, tested and assembled within the COSMOGAS facilities, thus guaranteeing the best quality control. 2.2 - Overview of models MYDENS XXY “50C”...

  • Page 7: Manufacturer

    - to achieve a high level of operating safety; charge or retailers. - to maintain a high level of environmental combustion compatibility; Offer your customer a scheduled maintenance contract. MYDENS 50-60 COSMOGAS...

  • Page 8: Main Components

    9 - Primary heat exchanger 21 - Front casing 10 - ---------- 22 - Display 11 - Air vent valve 23 - Control panel 12 - Air intake and exhaust gases outlet Figure 3-1 – Boiler internal components MYDENS 50-60 COSMOGAS...
  • Page 9 27 - Central heating circuit pressure sensor 36 - LH ignition electrode 37 - RH ignition electrode 1007 28 - Return temperature sensor (Par. 38 - Primary heat exchanger temperature fuse Figure 3-2 – Boiler internal components MYDENS 50-60 COSMOGAS...

  • Page 10: Operation

    23 = Central heating system 24 = Air vent valve 25 = Safety valve 26 = Water flow rate gauge 50 = Primary heat exchanger temperature fuse * Only on model C Figure 4-1 – Hydraulic layout MYDENS 50-60 COSMOGAS...

  • Page 11: Operation And Intended Use Of The Appliance

    4.1.3 - Production of domestic hot water For the production of domestic hot water a storage tank must be connected following the diagram in figure 4-6. The temperature of the domestic hot water is adjusted following the procedure in section 7.7. MYDENS 50-60 COSMOGAS...

  • Page 12: Characteristic Residual Head Curves At The Central Heating System

    4-2. The modulation range (detail “x”) can be checked using the graph in figure 4-2. Figure 4-2 KEY X = Modulation range Figure 4-2 – Residual head for appliance model “C” with modulating pump (as standard) MYDENS 50-60 COSMOGAS...

  • Page 13: Characteristic Curve Of Head Losses

    For this purpose the hydraulic resistances of the boiler are shown in figure 4-3 in the form of a graph. Figure 4-3 - Hydraulic resistances of applianbces models “A” MYDENS 50-60 COSMOGAS...
  • Page 14 4 - OPERATION MYDENS 50-60 COSMOGAS...
  • Page 15 4 - OPERATION MYDENS 50-60 COSMOGAS...

  • Page 16: Installation

    1 - Central heating delivery 1” 1/2 2 - 3/4" gas inlet 3 - Central heating return 1” 1/2 4 - Flue gas outlet / Air intake 5 - Support brackets Figure 5-2 – Boiler dimensions and attachments centre-to-centre distances MYDENS 50-60 COSMOGAS...

  • Page 17: Unit Assembly

    4.- hang the boiler on the plugs “C”; 5.- make the hydraulic connections. 5.5 - Delivery and return WARNING! COSMOGAS is not liable for any damage caused by incorrect use of additives in the central heating system. WARNING! The system after the appliance must be made with materials that resist temperatures up to 97°C and pressure of 3 bar.

  • Page 18: Water Supply

    The presence of air is caused by the fact that the system might not be perfectly sealed. A slow drop in system pressure due to a leak is often difficult MYDENS 50-60 COSMOGAS...

  • Page 19: Water Treatment In Domestic Heating Systems

    20°C (see section 7.15). 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 climate control) can supply water at a temperature over 45°C. MYDENS 50-60 COSMOGAS...

  • Page 20: Condensate Outlet

    G = central heating return Ø 35 Figure 5-7 – Siphon funnel (on request) C = delivery fitting 1” 1/2 D = return fitting 1” 1/2 E = Gasket 1”1/2  The accessories, in some models, could be not supplied with the appliance. MYDENS 50-60 COSMOGAS...

  • Page 21: Electrical Connections: Details

    L1 = Boiler power supply line N = Boiler power supply neutral EARTH SYMBOL = Earth contacts 020025.01.009 21 20 19 18 17 16 15 14 13 12 11 10 9 8 0-10 Slave 020002.01.010 Figure 5-8 – Electrical connections MYDENS 50-60 COSMOGAS...

  • Page 22: Connecting The Power Supply Cable

    20 mm longer than the other two; 7.- Connect the yellow/green cable to the earth terminal (see symbol); 8.- Connect the brown cable (Phase) to terminal L1; 9.- Connect the blue cable (Neutral) to terminal N. MYDENS 50-60 COSMOGAS...

  • Page 23: Connecting The Room Thermostat/Programmable Thermostat

    Remember to follow the instructions in the CR04 remote control manual carefully. Figure 5-9 – Correct positioning of the room thermostat/programmable thermostat MYDENS 50-60 COSMOGAS...

  • Page 24: Installing The External Temperature Sensor

    2.- Set parameter (see section 7.15) according to the type of climate control desired (see section 7.10); Maximum delivery temperature (Par.2024) Minimum delivery temperature (Par.2023) ON/OFF hysteresis Figure 5-10 – Operating rules for 0-10 VDC analogue input MYDENS 50-60 COSMOGAS...

  • Page 25: Connection And Setting Of The Appliance In Cascade

    (Heat exchanger flow sensor); 2141 for models 24 and 34 = 1 for models 60 = 3,4 (Rated heat exchanger water flow rate); 4184 (Module logical address); 4147 at the value of the number of modules in cascade (MASTER included); MYDENS 50-60 COSMOGAS...
  • Page 26 10 = S4 switch position on MASTER appliance; 4 = SLAVE appliance #4 until #8; 11 = S4 switch position on SLAVE appliances; 5 = Check valve; 12 = Connection to the next appliance; 6 = Bus A-LINK; 7 = General cascade temperature sensor; MYDENS 50-60 COSMOGAS...

  • Page 27: Connecting The Boiler To Storage Tank With Coil

    51°C may cause permanent injury/damage to persons, animals and objects. In particular, protect children, the elderly and people with disabilities against any possible risks of scalds, by inserting devices that limit the usage temperature of the DHW to users. MYDENS 50-60 COSMOGAS...

  • Page 28: Exhaust Gases Outlet And Combustion Agent Air Intake Pipe

    - C83, separated with wall intake or another point independent from the intakes of other appliances, and outlet in exhaust flue. - C93, separated with outlet on roof and intake in pre- existing channel. Figure 5-13 – Outlet/intake systems MYDENS 50-60 COSMOGAS...

  • Page 29: Type Of Intake/Outlet B23 And B23P

    MYDENS 50-60 COSMOGAS...

  • Page 30: Split 80/80Pp" System (Polypropylene) (Type C43; C53; C83; C93)

    1 metre from each other. The rods must be fastened to rigid walls that can take the weight of the duct itself. Figure 5-16 – Fixing the outlet and intake pipes MYDENS 50-60 COSMOGAS...

  • Page 31: Split 80/80Pp" System (Type C43; C53; C83; C93): Accessories Available

    62617249 - N°18 PP anti-slip bands for extensions 62617240 - N° 14 M.F. PP L=20m hose 62617241 - N°16 spacer for hose 62617238 - N° 17 PP telescopic joint 62617242 - N° 15 PP T-fitting 62617246 - N° 13 M/F PP 45° bend MYDENS 50-60 COSMOGAS...

  • Page 32: Split 80/80Pp" System (Type C43; C53; C83; C93): Installation Examples

    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 5-18 – Example of “80/80 PP system” installation MYDENS 50-60 COSMOGAS...

  • Page 33: 80/125Pp Vertical Coaxial" System (Polypropylene) (Type C13; C33)

    9. Every 45° bend has a loss equivalent to the value in section 9. Figure 5-20 - Measurements and centre space distances for coaxial outlet preinstallation hole Figure 5-21 - Positioning the coaxial pipe MYDENS 50-60 COSMOGAS...

  • Page 34: 80/125Pp Coaxial" System: Accessories Available

    62617322 - N° 6 M/F PP 45° coaxial bend 62617323 - N° 7 L 1m PP coaxial extension 62617255 62617325 - N° 3 PP coaxial roof terminal 62617324 - N° 5 PP coaxial wall terminal 62617321 62617322 62617323 62617324 62617325 MYDENS 50-60 COSMOGAS...

  • Page 35: 80/125Pp Coaxial" System: Installation Examples

    When setting up a coaxial outlet (see figure 5-22), whether vertical and horizontal, the outlet pipe must slope upwards so that the condensate flows into the boiler. Figure 5-22 – Examples of coaxial pipe installation MYDENS 50-60 COSMOGAS...

  • Page 36: Start-Up

    WARNING! 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. 020005.01.006 Figure 6-1 – Filling the condensate drain siphon MYDENS 50-60 COSMOGAS...

  • Page 37: Type Of Gas For Which The Appliance Is Set

    9. - Slide gas valve “P” up and out; 10. - Replace gas nozzle “R” (see figure 6-4) with an appropriate one according to figure 6-6 under “Gas nozzle diameter”; Figure 6-4 – Replacing the gas nozzle MYDENS 50-60 COSMOGAS...
  • Page 38 10.0 8.7 ± 8.3 ± 5.0 ± 5.8 ± 10.1 ± 9.5 ± 5.9 ± 6.8 ± 10.1 ± 9.5 ± 5.5 ± 6.4 ± Figure 6-6 – Correspondence table for parameter 2138 and the operating values MYDENS 50-60 COSMOGAS...

  • Page 39: Ignition

    6.- If the icon flashes but the radiators still do not heat up, bleed the air from the radiators again. 020002.01.023 A - Gas inlet tapping point. Figure 6-7 – Gas valve MYDENS 50-60 COSMOGAS...

  • Page 40: Controlling The Supply Gas Pressure And Any Adjustments

    13.- Close the tapping point “A” again as in figure 6-7; 14.- Check for any gas leaks at the pressure point using suitable tools. WARNING! Test the gas seal using a soap and water solution only. The use of naked flames is prohibited. MYDENS 50-60 COSMOGAS...

  • Page 41: Controlling The Level Of Co2 And Any Adjustments

    6.8, and run the CO2 analysis test or A - CO2 adjustment screw at maximum power; 0200 combustion efficiency test, setting parameter B - CO2 adjustment screw at minimum power; previously referred to at the value. Figure 6-9 – Gas valve MYDENS 50-60 COSMOGAS...

  • Page 42: Adjusting The Power In Central Heating Line (Range Rated)

    1.- Access the “installer” profile as detailed in section 7.15; 2014 2.- Set parameter as shown in the table in figure 6-10; Figure 6-10 – Corresponding values to enter under parameter to obtain the desired power 2014 necessary in central heating line MYDENS 50-60 COSMOGAS...

  • Page 43: Use

    S - Key for reducing the temperature of the domestic hot water (below the minimum, the domestic hot water is set to OFF) or for scrolling through and changing the value of the parameters T - On/off switch U - Appliance in anti-freeze mode MYDENS 50-60 COSMOGAS...

  • Page 44: General Information

    70°C. By pressing and holding the key down even below 40°C, the message “ ” appears to indicate that the domestic hot water service is being switched off. The icon “F” in figure 7-1 also goes off. MYDENS 50-60 COSMOGAS...

  • Page 45: Central Heating

    ; “Control from input 0-10 VDC with room thermostat”: The heating delivery temperature is adjusted by means of the 0-10 VDC signal as shown in figure 5-10. The opening or closing of the room thermostat has priority over the 0-10 VDC signal adjustment. MYDENS 50-60 COSMOGAS...

  • Page 46: Climate Control: Which Systems

    The recommended start value is 22°C. - It is also possible to set the minimum and maximum central heating temperatures using the respective parameters 2023 2024 in section 7.15. MYDENS 50-60 COSMOGAS...
  • Page 47 = Minimum heating temperature setting 2024 Par. = Maximum heating temperature setting 2025 Par. = Heating stop spring temperature 2109 Par. = Adjusting the line parallelism Figure 7-2 – Climate control graph for “high temperature” systems (with radiators) MYDENS 50-60 COSMOGAS...

  • Page 48: Climate Control: Adaptation To Different Climate Areas

    If the boiler is not used for a long period of time (over a year), system loops have flow resistances that are much higher empty it following the procedure in section 8.15. than others. MYDENS 50-60 COSMOGAS...

  • Page 49: User Profile

    0: Heating or DHW according to the service active at that by parameter 0910 time 1: Heating User 2: DHW 3: N/A 4: Cascade Temperature 0997 Display icon test User 0998 Installer access code Factory Code 0000…9999 0300 0999 Factory access code Factory Code 0000…9999 MYDENS 50-60 COSMOGAS...
  • Page 50 OPEn Eg: If it shows 4:26, it means 26 weeks; (the display of the number 255 means that there has been no block or This parameter is only active if the parameter 2203=On. error). MYDENS 50-60 COSMOGAS...

  • Page 51: Installer Profile

    -25 to 25 2021 Climate - Spring heating temperature Installer °C 20-90 2022 Climatic - Outside spring temperature Installer °C 0-30 2023 Minimum heating temperature (Except 0-10V Installer °C 0-80 (2001 = 4) for which to see 2111) MYDENS 50-60 COSMOGAS...
  • Page 52 (only for 2035 = 7) 1 = Antifreeze (N/A) 2 = Eco (recirculation kept at value set under 2065); 3 = Comfort (recirculation kept at DHW temperature); 2065 ECO recirculation temperature (see par. 2064) Factory °C 20-60 MYDENS 50-60 COSMOGAS...
  • Page 53 Programmable output 2 J3 5-10 Factory 0 = Disabled 9 = External spark generator 1-8 = N/A 9 = Enabled point 9 10 = N/A 2127 Programmable output 3 J3 6 Installer 0 = Disabled 1-10 = N/A MYDENS 50-60 COSMOGAS...
  • Page 54 RST = Reset 2204 Days until maintenance request Installer days 30-1275 1000 2205 Anti-freeze protection Installer EnA = Enabled dIS = Disabled 2206 Anti-legionella Installer EnA = Enabled dIS = Disabled 2207 DHW detection delay Installer secs 0-255 MYDENS 50-60 COSMOGAS...

  • Page 55: Parameters For Cascade Systems

    Power management 2 (parameter 4148) – Minimum Installer 0-100 power 4153 Power management 2 (parameter 4148) – hyster- Installer 0-100 esis 4154 Cascade pump post-circulation Installer Secs 0-255 4155 Cascade sensor anti-freeze temperature Installer °C 10-30 4184 Module logical address Installer MYDENS 50-60 COSMOGAS...

  • Page 56: Diagnostics

    60 seconds replace the command board. Loc 6 Fan too slow for more Check it is powered at 230Vac. If the fan is powered, it must be replaced; otherwise, than 60 seconds replace the command board. MYDENS 50-60 COSMOGAS...
  • Page 57 Loc 23 Software error on the Replace the command board. command board MYDENS 50-60 COSMOGAS...
  • Page 58 Loc 37 Software error on the Replace the command board. command board Loc 38 Software error on the Replace the command board. command board Loc 39 Software error on the Replace the command board. command board MYDENS 50-60 COSMOGAS...

  • Page 59: Diagnostics: Errors "Err

    8.19. Check the elec- it. If the electric circuit is damaged, repair it. Where tric cables for connection between the sensor and neither of the two previous cases apply, replace the the command board. command board. MYDENS 50-60 COSMOGAS...
  • Page 60 Err 139 Software error on the Replace the command board. command board Err 140 Software error on the Replace the command board. command board Err 141 Software error on the Replace the command board. command board MYDENS 50-60 COSMOGAS...
  • Page 61 Check that the heat exchanger is not blocked; Err 165 Supply current too low Power supply current too low for more than 60 seconds Err 166 Supply current too high Power supply current too high for more than 60 seconds MYDENS 50-60 COSMOGAS...

  • Page 62: Diagnostics: Alarms "Atte

    (contact open or Check that it has been connected correctly. of the two previous cases apply, replace the com- short-circuited) mand and control board. AttE 206 Cascade probe Replace the command and control board error (contact open or short-circuited) MYDENS 50-60 COSMOGAS...

  • Page 63: Maintenance

    WARNING! Before any maintenance work, disconnect the appliance from the electrical power supply, using the relevant switch nearby. WARNING! Before any maintenance operation turn off the gas cock MYDENS 50-60 COSMOGAS...

  • Page 64: Maintenance Protocol

    2. - In the event of obstructions in the drain pipe proceed with cleaning the pipe; in the event of other damage indicated above proceed with replacing the valve. MYDENS 50-60 COSMOGAS...

  • Page 65: Checking The Condition Of The Safety And Control Devices

    1. - Check that after attempts to start the appliance, with the gas shut-off valve closed, the appliance goes into lockout mode and the “Loc 1” message appears on the display. 2. - If the lockout message does not appear, replace the command and control board. MYDENS 50-60 COSMOGAS...

  • Page 66: Dismantling Of Casing And Access To Internal Components

    To access the electrical connections board: 1.- Turn the control panel “D” towards the front; 2.- Slide cover “E” out using the closing flaps “F”; 020005.01.007 Figure 8-1 – Removing the casing and opening the control panel MYDENS 50-60 COSMOGAS...

  • Page 67: Dismantling The Burner Fan Assembly

    If the gasket is damaged DO NOT reuse it, it must be . Consult the replaced along with the burner unit manufacturer for information on replacing it. 020005.01.008 Figure 8-2 – Removing the burner-fan unit MYDENS 50-60 COSMOGAS...

  • Page 68: Correct Positioning Of Ignition And Ionisation Electrodes

    11.- Check for any gas leaks using the relevant tools; WARNING! Test the gas seal using a soap and water solution only. The use of naked flames is prohibited. Figure 8-3 – Positioning the electrodes on the burner 020025.01.004 Figure 8-4 – Removing the electrodes MYDENS 50-60 COSMOGAS...

  • Page 69: Dismantling And Replacing The Gas Valve

    13.- Check for any gas leaks using the relevant tools; WARNING! Test the gas seal using a soap and water solution only. The use of naked flames is prohibited. 020005.01.015 020025.01.040 Figure 8-5 – Removing the gas valve MYDENS 50-60 COSMOGAS...

  • Page 70: Cleaning The Condensate Conveyor Siphon

    “H”; siphon 10.- Restore the level of liquid inside the siphon, following the procedure in section 6.1.2. 020002.01.030 02002.01.029 Figure 8-7 – Removing the condensate collection Figure 8-8 – Condensate collection siphon siphon MYDENS 50-60 COSMOGAS...

  • Page 71: Removing The Flow Meter

    5.- Loosen the fitting that attaches the safety valve to the pipe; 6.- Remove safety valve “A” by taking it upwards and replace it, returning its outlet pipe to its former position. 020005.01.009 Figure 8-10 – Removing the safety valve MYDENS 50-60 COSMOGAS...

  • Page 72: Removing The Air Vent Valve

    5.- Slide out and remove pressure sensor “A” from fitting “C”, as shown in the figure. 6.- Proceed with replacing the sensor, restoring the connections to as they were before. Figure 8-13 – Removing the central heating circuit pressure sensor MYDENS 50-60 COSMOGAS...

  • Page 73: Emptying The Boiler

    (93°C).  Forcing lasts 10 minutes, after which the appliance returns to normal operating conditions. MYDENS 50-60 COSMOGAS...

  • Page 74: Checking The Ionisation Current

    The electrical resistance between the two sensor contacts must correspond to figure 8-14. 1001 1002 1005 The temperature sensors are: 1006 1007 , and . Check their positioning in figures 3-1 and 3-2. Figure 8-14 - Water sensors curve MYDENS 50-60 COSMOGAS...

  • Page 75: Outdoor Temperature Sensor

    On request, the external temperature sensor can be 1004 connected to the boiler (see section 5.14.5). The electrical resistance between the two sensor contacts must correspond to that shown in figure 8-15. Figure 8-15 - Outdoor temperature sensor curve MYDENS 50-60 COSMOGAS...

  • Page 76: Wiring Diagram

    8 - MAINTENANCE 8.21 - Wiring diagram Figure 8-16 – Operating wiring diagram MYDENS 50-60 COSMOGAS...
  • Page 77 19 - System fill solenoid valve example above). This is to identify 20 - Slave appliance BUS the correct follow-on of the cables on the next page. 21 - Cascade sensor (1015) 22 - Master appliance BUS MYDENS 50-60 COSMOGAS...

  • Page 78: Technical Data

    Minimum operating flow rate 2500 2500 2500 2500 DHW adjustment range with storage tank °C 40 - 70 40 - 70 40 - 70 40 - 70 Design temperature °C Maximum central heating temperature °C Minimum central heating temperature °C MYDENS 50-60 COSMOGAS...
  • Page 79 Max. negative pressure allowed in the flue gas outlet/air intake system Condensate maximum flow rate Condensate average acidity Operating room temperature °C 0.5 ; + 50 0.5 ; + 50 0.5; + 50 0.5; + 50 Boiler weight MYDENS 50-60 COSMOGAS...

  • Page 80: Product Fiche

    According to Regulations (EU) no. 811/2013 and no. 813/2013. N/A = Not applicable. (*) High-temperature regime means 60°C return temperature and 80°C delivery temperature. (**) Low-temperature regime for condensing boilers means 30°C, for low-temperature boilers, 37°C, and for other appliances, 50°C return temperature MYDENS 50-60 COSMOGAS...

  • Page 81: Command Menu Diagram

    (see section 7.16) Example of Menu 0.000 menu parameters (see section 7.15) Return to normal operation Example of Return to normal operation 0.200 menu parameters (see section 7.15) Figure 10-1 - Command menu diagram MYDENS 50-60 COSMOGAS...

  • Page 82: Note

    12 - NOTE MYDENS 50-60 COSMOGAS...

  • Page 83: Eu Declaration Of Compliance

    13 - EU DECLARATION OF COMPLIANCE The undersigned CEO of the company COSMOGAS S.r.l., with registered office in Via L. Da Vinci no. 16 - 47014 Meldola (FC) Italy, DECLARES under its own responsibility that the central heating boiler: SERIAL No.
  • Page 84 COSMOGAS s.r.l. Via L. da Vinci 16 - 47014 MELDOLA (FC) ITALY info@cosmogas.com www.cosmogas.com...

This manual is also suitable for:

Mydens 60Mydens 50cMydens 60cMydens 50aMydens 60a

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