Benchmark Metropolis DGT 25 BF Installation And Servicing Instrucnion
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Benchmark Metropolis DGT 25 BF Installation And Servicing Instrucnion

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ENSURE THAT THESE INSTRUCTIONS ARE LEFT
ENG
FOR THE USER AFTER COMPLETION OF THE
BENCHMARK SECTION
IT
ES
METROPOLIS
DGT 25 BF
Installation and

servicing instructions

Please read the Important Notice within
199838
this guide regarding your boiler warranty

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Summary of Contents for Benchmark Metropolis DGT 25 BF

  • Page 1: Servicing Instructions

    ENSURE THAT THESE INSTRUCTIONS ARE LEFT FOR THE USER AFTER COMPLETION OF THE BENCHMARK SECTION METROPOLIS DGT 25 BF Installation and servicing instructions Please read the Important Notice within 199838 this guide regarding your boiler warranty...

  • Page 2: Safe Handling

    To take advantage of any extended warranty offered, all you have to do is to adhere to these 3 simple conditions: • The installation must be carried out to Manufacturers/Benchmark Standards by a Gas Safe Registered Engineer, and recorded in the installation manual.

  • Page 4: The Benchmark Scheme

    The Benchmark Scheme Sime Ltd is a licensed member of the Benchmark Scheme which aims to improve the standards of installation and commissioning of domestic heating and hot water systems in the UK and to encourage regular servicing to optimi- se safety, efficiency and performance.

  • Page 5: Table Of Contents

    USE AND MAINTENANCE (including BENCHMARK) ........

  • Page 6: Description Of The Boiler

    The boiler can be used with a 24V room both D.H.W. and C.H. thermostat (class II according to EN The Sime “METROPOLIS DGT 25 BF” are In order to see the several solutions for the 60730. 1 ). wall mounted, fan assisted balanced flue inlet/outlet air/smoke to see the sections combination boilers.
  • Page 7 GENERAL DATA METROPOLIS DGT 25 BF Heat output Nominal 23.7 Minimum Heat input Nominal 25.5 Minimum Termal efficiency (CEE 92/42 directive) Class NOx Water content Adsorbed power consumption Electrical protection grade IPX5D Maximum water head Maximum temperature °C Expansion vessel...
  • Page 8 HYDRAULIC CIRCUIT 1 Fan 16 3 BAR safety valve 2 Bithermal exchanger 18 Connection plate 3 D.H.W. sensor (SS) 19 D.H.W. cock 4 C.H. sensor (SM1/SM2) 20 Gas cock 5 Combustion chamber 21 C.H. flow cock 6 Gas valve 22 C.H. return cock 7 Water pressure valve 8 Circulator with air release vent CONNECTIONS...
  • Page 9 INTERNAL VIEW 1 Control panel 2 Circulation pump 3 Air relief valve 4 Burners 5 Expansion vessel 6 C.H. sensor (SM1/SM2) 7 Air pressure switch 8 Fan 9 Bithermal exchanger 10 Ignition/detection electrode 11 D.H.W. sensor (SS) 12 Gas valve Fig.

  • Page 10: Installation

    INSTALLATION 2. 1 STATUTORY REQUIREMENTS An existing cupboard, or compartment, supplier consulted. may be used provided it is modified – The minimum acceptable dimensions from GAS SAFETY (INSTALLATION AND USE) accordingly. the terminal to obstructions and REGULATIONS (as amended). It is the law –...
  • Page 11 VENTILATION REQUIREMENTS to sealed central heating water systems. must not be used to fill the heating – Check that the mains water pressure is system. Detailled recommendations for air supply sufficient to produce the required D.H.W. – It is important to check the inhibitor are given in BS5440:2.
  • Page 12 TYPICAL SYSTEM DESIGN NOTE: A drain cock should be installed at the lowest point of the heating circuit and beneath the appliance. Fig. 6 ALTERNATIVE METHODS OF FILLING A SEALED SYSTEM Fig. 7...
  • Page 13 2.9. 1 Pump TABLE 4 The available head shown in fig. 5 is that in Vessel charge and initial system pressure 14.5 21.8 excess appliance hydraulic resistance, i.e. that available for the system Total water content of system using 8 l (1.76 gal) capacity at any given heating load up to the expansion vessel supplied with appliance 21.
  • Page 14 outlet. – Connect the D.H.W. pipework as required. 2. 1 5 GAS CONNECTIONS – Fit the gas isolation valve. – Connect the gas supply pipe. 2. 1 6 SAFETY VALVE CONNECTION IMPORTANT: – Each additional 90° curve installed – The appliance safety valve is located reduces the available length by 1.0 towards the R.H.S.
  • Page 15 and with a density of 50 kg/m TABLE 5 Accessories ø 80 Load loss (mm H The maximum available length is determi- Intake Outlet ned by the sum of the head losses of the 90° elbow MF 0.35 0.40 individual components of the flue and 45°...
  • Page 16 tected by a 3A fuse with a distance of at 2. 1 8. 1 Room Thermostat Description of the letters indicating the least 3 mm between contacts. components shown on the system dia- Remove the boiler casing, remove the two grams: NOTE: The boiler must be connected with securing screws and tilt the control panel.
  • Page 17 2. 1 9 BOILER ELECTRICAL DIAGRAM NERO-BLACK NERO-BLACK BLU-BLUE MARRONE-BROWN 230 V MARRONE-BROWN 50 Hz BLU-BLUE EV1-2 44 44 45 45 49 49 39 39 (24 VDC) CD.6301420D (24 VDC) 29 29 12 12 38 38 30 30 16 16 15 15 11 11 (24 VDC)

  • Page 18: Characteristics

    CHARACTERISTICS 3. 1 CONTROL PANEL 1 - DESCRIPTION OF DISPLAY ICONS 2 - DESCRIPTION OF CONTROLS SUMMER MODE ICON OPERATING MODE/RESET By pressing the key in succession, pass to the sum- mer and winter function (stand-by function if perma- WINTER MODE ICON ne on the key more than two second).
  • Page 19 SETTING Number hours of operation of the burner 00 ... 99 h x 100 0, 1 da 0,0 a 9,9 METROPOLIS DGT 25 BF 1 da 10 a 99 Number of ignitions of the burner 00 ... 99 x 1000...
  • Page 20 EXTERNAL SENSOR If there is an external sensor, the heating settings SET can be taken from the climatic curves according to the external tempera- ture and, in any case, limited to with the range values described in point 3.2 (para- meters PAR 13 and PAR 14).
  • Page 21 SEALED CHAMBER CAMERA STAGNA VENTILATORE (--) PRESSURE SWITCH PRESSOSTATO Fig. 14 By-pass on By-pass off Water pressure valve Automatic air vent Drain vent REFERENCE POSITION BY-PASS RIFERIMENTO POSIZIONE BY-PASS Fig. 15...

  • Page 22: Use And Maintenance (Including Benchmark)

    USE AND MAINTENANCE (including BENCHMARK) 4. 1 GAS VALVE The boilers are equipped standard with the SIT 845 SIGMA gas valve (fig. 16). The gas valve is set at two pressure values: maximum and minimum. According to the type of gas burnt, these correspond to the values given in Table 7.
  • Page 23 DO NOT USE to the internal components of the boiler. of usage,but in general once a year NAKED FLAMES. Codice/Code 8107910 Modello/Model METROPOLIS DGT 25 BF Matricola/Serial n. 9999999999 PAR 1 = 01 (METANO)/ 03 (GPL) PAR 2 = 01 Fig. 19...
  • Page 24 4.4. 1 Chimney sweep function alarm “AL 02”. Bring the pressure back to normal, until the pressure indicated To check boiler combustion, press at the on the hydrometer reaches 1 - 1.2 bar. same time the installer's key ( & ) for If the load procedure has to be repeated a few seconds.
  • Page 25 Turn on a DHW tap fully (preferably the bath tap). Set the controls to the required values as IGNITION/DETECTION shown in the user guide. Complete the Benchmark sheet enclosed ELECTRODE in this manual. Explain controls and operation to the user. Leave all documentation with the user.
  • Page 26 Failure to install and commission according to the manufacturer’s instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty. This does not affect the customer’s statutory rights. If yes, and if required by the manufacturer, has a water scale reducer been fitted? CONDENSING BOILERS ONLY The condensate drain has been installed in accordance with the manufacturer’s instructions and/or BS5546/BS6798...
  • Page 27 Service R ecord It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. This is also a condition of any extended warranty offered. Service Provider Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.

  • Page 28: Fault Finding

    FAULT FINDING If an electrical fault occurs on the appliance SHORT CIRCUIT CHECK approx.: 240 V ac. the preliminary electrical system checks – Test leads from L to E “ ” meter reads Switches turned FULL ON - meter set on Ω must be carried out first.
  • Page 29 - Remove the air pressure switch fixing nections. - Remove the boiler cover, see 4.3. bracket. - Refit in reverse order, using new gaskets. - Close the flow and return isolation valves. - Transfer the bracket to the new air pres- - Reset the gas valve as described in 4.2.

  • Page 30: Exploded Views

    EXPLODED VIEWS 8107910 CALD.GPL. METROP.DGT 25 BF(UK) øˇ Posiz. Codice Descrizione 6318350 Left hand side frame part 6318300 Right hand side frame part 6317600 Sealed chamber rear panel 6229838 Gasket for sealed chamber 5183726 Rectang. expansion vessel 8 l. 6257531 Air deflector 5198211 Main burner assembly...
  • Page 31 6229110 Smoke pressure switch bracket 6225715 Air pressure switch 6243820 SIT gas valve type 845 SIGMA 6226884 Gas inlet pipe 6226958 Pipe conn. gas valve to burner 6304794 Panel kit 6301420 Main P.C.B. 2211010 Terminal strip 6305050 Control panel cover 6317700 Sealed chamber front panel 5192208...
  • Page 32 8107911 CALD.GPL. METROP.DGT 25 BF(UK) Posiz. Codice Descrizione 6318350 Left hand side frame part 6318300 Right hand side frame part 6317600 Sealed chamber rear panel 6229838 Gasket for sealed chamber 5183726 Rectang. expansion vessel 8 l. 6257531 Air deflector 5198211 Main burner assembly 6235932 Ignition-ionisation electrode...
  • Page 33 6229110 Smoke pressure switch bracket 6225715 Air pressure switch 6243820 SIT gas valve type 845 SIGMA 6226884 Gas inlet pipe 6226958 Pipe conn. gas valve to burner 6304794 Panel kit 6301420 Main P.C.B. 2211010 Terminal strip 6305050 Control panel cover 6317700 Sealed chamber front panel 5192208...
  • Page 34 NOTES...

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