Biasi RIVA COMPACT M90E.24S Service Manual
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Biasi RIVA COMPACT M90E.24S Service Manual

Wall hung, fan flue, room sealed gas boiler
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Wall hung, fan flue, room sealed gas boiler
SERVICE MANUAL
RIVA COMPACT
Models:
M90E.24S
M90E.28S
M90E.32S
Leave this manual adjacent to the gas meter
G.C. Appl. No.
47--970--17
47--970--18
47--970--21
Unit 31/33, Planetary Road
Industrial Estate, Neachells Lane
Willenhall, Wolverhampton WV 13 3XB
Technical helpline: 01902 304 400
Web site: www.biasi.co.uk
Biasi U.K. Ltd

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Summary of Contents for Biasi RIVA COMPACT M90E.24S

  • Page 1 G.C. Appl. No. M90E.24S 47--970--17 M90E.28S 47--970--18 M90E.32S 47--970--21 Leave this manual adjacent to the gas meter Biasi U.K. Ltd Unit 31/33, Planetary Road Industrial Estate, Neachells Lane Willenhall, Wolverhampton WV 13 3XB Technical helpline: 01902 304 400 Web site: www.biasi.co.uk...

  • Page 3: Table Of Contents

    Table of contents 10.3 Removal ......10.4 Ignition and control sequence ..Overall information .

  • Page 4: Overall Information

    Overall information Overall View Air pressure switch Expansion Main heat exchanger vessel Safety thermostat Burner Combustion chamber Ignition electrodes Detection electrode Diverter valve Automatic D.h.w. air release heat exchanger valve Main circuit flow switch D.h.w. temp. probe Pump Gas valve D.h.w Control flow switch...

  • Page 5: General Access And Emptying Hydraulic Circuits

    General access and emptying hydraulic circuits Nomenclature Fig. 2 To remove the side panels loosen the screws B and C (Fig. 3), bring the base of the panels away from the boiler and lift them, freeing them from the top hooks. Fig.

  • Page 6: Access To The Sealed Chamber

    General access and emptying hydraulic circuits To gain access to the parts contained in the sealed chamber it is necessary to remove the lid of the sealed chamber. For this purpose, remove the front and side panels of the case, remove the screws G as indicated in Fig. 6 and remove the lid.

  • Page 7: Diagrams

    Diagrams Wiring diagram Wiring diagram for boiler equiped with full sequence ignition device type: Bertelli & Partners FM30 External controls Electric supply Safety Air pressure Ignition Flame detection terminal block terminal block thermostat switch electrodes electrode gnye gnye Electronic control p.c.b. Full sequence ignition device gnye...
  • Page 8 Diagrams Wiring diagram for boiler equiped with full sequence ignition device type: Honeywell FPLD External controls Electric supply Safety Air pressure Ignition Flame detection terminal block terminal block thermostat switch electrodes electrode gnye gnye Electronic control p.c.b. Full sequence ignition device gnye gnye DHW temperature...

  • Page 9: Functional Flow Diagrams

    Diagrams Functional flow diagrams General layout Electronic control p.c.b. (low voltage section) J1--- 1 Fuse 1,6A T Transformer J3--- 5 J3--- 4 J3--- 3 Three way diverter valve J1--- 2 Pump J3--- 1 J3--- 2 J2--- 5 J2--- 4 Full sequence ignition device Heat request on d.h.w.

  • Page 10: Circuit Voltages

    Diagrams Circuit voltages Diagrams for boiler equiped with full sequence ignition device type: Bertelli & Partners FM30 during c.h. or d.h.w. operation Electrical voltages with burner on only during c.h. operation only during d.h.w. operation 230~ 230~ 230~ 230~ Pump 230~ Full sequence Ignition device...
  • Page 11 Diagrams Diagrams for boiler equiped with full sequence ignition device type: Honeywell FPLD during c.h. or d.h.w. operation Electrical voltages with burner on only during c.h. operation only during d.h.w. operation 230~ 230~ 230~ 230~ Pump 230~ Full sequence Ignition device 230~ 230~ 230~...
  • Page 12 Diagrams...

  • Page 15: Primary Heat Exchanger

    Primary heat exchanger Characteristics The primary heat exchanger A in Fig. 9 has the function of transferring heat produced from combustion of the gas to the water circulating in it. Fig. 11 Unscrew the connection H (Fig. 12), lift the pipe I and rotate it right then move it downwards free- ing it from the heat exchanger connection.

  • Page 16: H.w. Heat Exchanger

    D.h.w. heat exchanger Removal Warning: isolate the boiler from the mains Function electricity supply before removing any covering or component. The d.h.w heat exchanger A in Fig. 13 allows the instan- taneous transfer of heat from the primary hydraulic cir- Remove the front and right hand side panels of cuit to the water destined for d.h.w use.

  • Page 17: Pump

    Pump Check that the impeller is integral with the rotor. With the boiler off remove the front and right hand side Function case panels, lower the control panel and empty the pri- mary circuit. The pump A in Fig. 17 has the function of making the Remove the pump head by undoing the screws which water in the main circuit circulate through the main heat hold it to the pump body and check that the impeller is...

  • Page 18: Function

    Three way diverter valve Function Spindle B The diverter valve A (Fig. 20) has the function of modify- not visible ing the hydraulic circuit of the boiler by means of an electric command given by the electronic control p.c.b. in order to send the water that exits the primary heat ex- changer towards the c.h.

  • Page 19: Removal Of The Diverter Group And Its Internal Parts

    Three way diverter valve Unscrew the screw L and remove the diverter group. Fig. 23 Removal of the diverter group and its Fig. 25 Rear view of the boiler internal parts Refer to the exploded view in Fig. 26 to remove Remove the front and both side case panels.

  • Page 20: Electronic Control P.c.b

    Electronic control p.c.b. The fundamental function of the Electronic control p.c.b. is that of controlling the boiler in relation to the ex- ternal needs (i.e. heating the dwelling or heating the Function water for d.h.w. use) and operating in order to keep the temperature of the hydraulic circuits constant.

  • Page 21: Operation/Service Lamps

    Electronic control p.c.b. The user, setting the desired temperature with the con- trol panel knobs operates the variable elements (5 and 6 in Fig. 28) of the electronic control p.c.b. If the power requested is lower than 40% of the maxi- mum power output then control is achieved by switch- ing ON the burner at minimum power, then switching OFF (ON/OFF function).

  • Page 22: Dip

    Electronic control p.c.b. The following table gives the relationship between the Normally operating boiler visible lamp indication and its meaning. Boiler in stand --- by condition. C.h. operation (function control in (function control in position). position). D.h.w. operation Anti--- freeze system active. A short pulse every 4 seconds Boiler ON condition Frost protect operation...

  • Page 23: Setting Jumpers

    Electronic control p.c.b. Ignition gas pressure adjustment After any adjustment operation the selector has to be brought back to the normal position (ON). By using the device ”11” (Fig. 28) marked “ACC.” on Selector 2 the Electronic control p.c.b., it is possible to adjust the gas pressure at the injectors in the ignition phase.
  • Page 24 Electronic control p.c.b. sure of the contact between the boiler reset but- ton B and the tab C (Fig. 37). Fig. 36 Unscrew the four screws that hold the Electronic control p.c.b. on to the control panel. Remove it by lifting its rear edge and freeing it Fig.

  • Page 25: Thermal Control In The

    Electronic control p.c.b. 9.11 Thermal control in the ” ” mode Switch in the function mode See functioning with the function Taking control in the mode water from the domestic hot water circuit? (sec. 9.12) Is primary circuit temperature higher than that selected? Request for heat from room thermostat?

  • Page 26: Full Sequence Ignition Device

    Full sequence ignition device With the burner firing, interrupt the gas supply. The Full sequence ignition device must carry out a complete ignition cycle and then stop. 10.1 Function By turning the boiler on and off by means of the function The Full sequence ignition device used on the boiler switch the device must not unlock and the burner must carries out the following fundamental functions:...

  • Page 27: Ignition And Control Sequence

    Full sequence ignition device 10.4 Ignition and control sequence supply from the electronic control circuit lock memorised? cancels lock Air pressure switch at rest? starts fan Air pressure switch at work? beginning of wait period presence of flame? Air pressure switch at work? starts ignition discharges opens gas valve...

  • Page 28: Modulating Gas Valve

    Modulating gas valve 11.1 Function The Modulating gas valve A in Fig. 42 controls the gas inflow to the boiler burner. Fig. 43 11.3 Adjustment Warning: isolate the boiler from the mains electricity supply before removing covering or component. Remove the front panel of the case. Open the gas valve inlet pressure test point (6 in Fig.

  • Page 29: Checks

    Modulating gas valve 11.4 Checks 11.6 Removal of the gas valve Warning: isolate the boiler from the mains Warning: isolate the boiler from the mains electricity supply before removing electricity supply before removing covering or component. covering or component. Check the modulation operator coil Remove the front panel of the case.

  • Page 30: Primary Circuit Flow Switch

    Primary circuit flow switch 12.2 Checks Warning: isolate the boiler from the mains 12.1 Function electricity supply before removing any covering or component. The Primary circuit flow switch (A in Fig. 47) function is to detect water flowrate through the primary hydraulic Mechanical function circuit of the boiler.

  • Page 31: Expansion Vessel And

    Warning: isolate the boiler from the mains electricity supply before removing any covering or component. Remove the front and left hand side panels of the case, turn off the flow and return isolation valves and empty the primary circuit. Completely unscrew the connection K, the lock- nut L (Fig.

  • Page 32: H.w. Flow Switch, Filter And Flow Limiter

    D.h.w. flow switch, filter and flow 14.2 Nomenclature and location of parts (Fig. 57) limiter Flow switch sensor 14.1 Function Plug Magnetic ring The d.h.w. flow switch A in Fig. 55 is a device that gener- Float ates an electrical signal when hot water is drawn. Spring Filter Body...

  • Page 33: Flow Limiter

    14.6 Flow limiter mode (Fig. 58). The M90E.24S model is factory fitted with a 10 litre/min. flow limiter. If on the M90E.28S model the flow rate of the d.h.w. cir- cuit is too high, it is possible to limit it by installing a flow limiter.

  • Page 34: Temperature Probe

    Temperature probe 15.2 Checks Temperature---resistance relationship 15.1 Function Warning: isolate the boiler from the mains The Temperature probe has the function of converting electricity supply before removing any the temperature of the water in the hydraulic circuit covering or component. where it is installed into an electrical signal (resistance).

  • Page 35: Function

    By---pass valve 16.2 Removal 16.1 Function Warning: isolate the boiler from the mains electricity supply before removing any The By---pass valve A in Fig. 64 is located between the covering or component. c.h. water flow and return and its function is that of guar- anteeing a minimum flow across the primary heat ex- Remove all the case panels.

  • Page 36: Fan, Venturi Device And Air Pressure Switch

    ”H” connection Disconnect the connectors B (Fig. 66) and measure the electrical resistance of the motor that has to be about: Fig. 67a 47 W --- M90E.24S 43 W --- M90E.28S 25 W --- M90E.32S (at ambient temperature). ”H” connection (not used) ”L ”...

  • Page 37: Removal Of The Fan

    Compare the value on the gauge with the follow- ing minimum values: device Warning: isolate the boiler from the mains 90 Pa (0,9 mbar) --- M90E.24S 100 Pa (1,0 mbar) --- M90E.28S electricity supply before removing any covering or component.

  • Page 38: Ignition And Detection Electrodes

    C (see Fig. 78 on page 38). Unscrew the screws A (Fig. 76) which hold the electrodes to the burner. Two screws are used on the models M90E.24S, M90E.28S Three screws, one for each electrode, are used on the model M90E.32S.
  • Page 39 Ignition and detection electrodes Extract the electrodes from the burner. Assemble the electrodes carrying out the removal operation in reverse order. Refer to Fig. 73 in order to recognise the elec- trodes and to correctly connect the wiring. Note: the metallic edge of the detection electrode is longer than the one of the ignition electrodes.

  • Page 40: Safety Thermostat

    Safety thermostat contact must be closed (electrical resistance zero 19.1 Function 19.3 Removal The safety thermostat A in Fig. 77 is a device that senses the temperature of the primary circuit water Warning: isolate the boiler from the mains which flows in the outlet pipe of the primary heat ex- electricity supply before removing any changer.
  • Page 41 Safety thermostat...

  • Page 42: Short Spare Parts List

    Polidoro 173---149 Burner (mod. M90E.28S) KI1004 147 Burner (mod. M90E.32S) BI1193 100 169---069 169---069 Injectors for natural gas (mod. M90E.24S) KI1064 505 KI1064 505 Polidoro Polidoro Injectors for natural gas (mod. M90E.28S) Injectors for natural gas (M90E.32S) BI1193 500 169---070 169---070 Injectors for LPG (mod.
  • Page 43 Short spare parts list...
  • Page 44 *1796209165* 17962.0916.5 1704 44A4 UK...

This manual is also suitable for:

Riva compact m90e.32sRiva compact m90e.28s

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