Biasi RIVA COMPACT HE MK2 M96A.24SR/C Service Manual
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Biasi RIVA COMPACT HE MK2 M96A.24SR/C Service Manual

Biasi RIVA COMPACT HE MK2 M96A.24SR/C Service Manual

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Download this manual See also: User Manual and Installation Instructions
Wall hung, fan flue, room sealed, high efficiency gas boiler
Service manual
RIVA COMPACT HE MK2
Models:
M96A.24SR/C
M96A.28SR/C
Leave this manual adjacent to the gas meter
G.C. Appl. No.
41---583---09
41---583---10
System boiler
System boiler

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Summary of Contents for Biasi RIVA COMPACT HE MK2 M96A.24SR/C

  • Page 1 Wall hung, fan flue, room sealed, high efficiency gas boiler Service manual RIVA COMPACT HE MK2 Models: G.C. Appl. No. M96A.24SR/C 41---583---09 System boiler M96A.28SR/C 41---583---10 System boiler Leave this manual adjacent to the gas meter...

  • Page 2: Table Of Contents

    Table of contents Nomenclature of the parts (Fig. 2) ..Adjustment ......Checks .

  • Page 3: Overall Information

    Overall information Overall View Flue temperature Air pressure sensor probe NTC Condensing heat exchanger Expansion vessel Main heat exchanger Safety thermostat Combustion chamber Burner Ignition electrodes Detection Automatic electrode air release By--- pass valve valve C.h. temp. probe Condensate trap Primary circuit pressure switch C.h.

  • Page 4: 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 5: 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 6: Diagrams

    Diagrams Wiring diagram Electric supply External controls Pump Ignition Flame detection terminal block terminal block electrodes electrode Air pressure sensor Primary circuit flow switch gnye bu bn gnye gnye bu bk bu bn bu gnye bn bu bu bu gnye Safety Flue C.h.

  • Page 7: Circuit Voltages

    Diagrams Circuit voltages during c.h. operation Electrical voltages with burner on Pump Supply network Modulating Gas valve pressure Safety thermostat sensor...

  • Page 10: Primary Heat Exchanger

    Primary heat exchanger Remove the clip I and the safety thermostat J . It is not necessary to disconnect it from the wiring. Function The primary heat exchanger A in Fig. 1 has the function of transferring heat produced from combustion of the gas to the water circulating in it.
  • Page 11 Primary heat exchanger Warning: After cleaning or replacement as detailed above, if it deemed necessary to undertake a combustion analysis, refer to the appropriate chapter Maintenance of the installation instructions manual.

  • Page 12: Condensing Heat Exchanger

    Condensing heat exchanger Condensing heat exchanger Rotate the exchanger as indicated by the arrow and remove it towards the front of the boiler. Function The return water flows through the condensing heat ex- changer A in Fig. 1 and Fig. 2. By reducing the combustion products temperature, the latent heat of the vapour is transferred to the water cir- cuit, allowing an extra gain of useful heat.
  • Page 13 If there are deposits of soot or dirt on the exchanger lid, Reassemble the exchanger carrying out the re- clean with a brush or non---metallic bristle brush. moval operations in reverse order. In any case, avoid any actions that can damage the pro- Warning: to lubricate the O-- ring gaskets tective varnish with which the lid has been covered.

  • Page 14: Pump

    Pump Check the absence of starting defects. With the boiler off remove the front case panel. Function Remove the air release plug from the pump. Start the boiler and with a screwdriver, turn the rotor in the direc- The pump A in Fig. 1 and Fig. 3 has the function of mak- tion of the arrow.
  • Page 15 Pump Remove the fork F and remove pressure gauge connection G (Fig. 3) Remove the fork H, loosen the connection I and remove the pipe J (Fig. 3) Remove the locking plate K (Fig. 3). Unscrew the two screws L that hold the pump on the frame and remove the pump.

  • Page 16: Electronic Control/Ignition P.c.b

    Electronic control/ignition p.c.b. The fundamental function of the Electronic control/igni- tion p.c.b. is that of controlling the boiler in relation to the external needs (i.e. heating the dwelling) and oper- Function ating in order to keep the temperature of the hydraulic circuits constant.

  • Page 17: Checking The Temperature

    Electronic control/ignition p.c.b. tiometers etc.) others are accessible by removing the service panel or the control panel lid. Fig. 2 x1 connector x6 connector x7 connector x4 connector x2 connector x15 connector x11 connector Lock ---out signal lamp Fig. 3 Boiler reset button The control sequences in function are illustrated in...

  • Page 18: Setting The Boiler Control Function Modes

    Electronic control/ignition p.c.b. Switch on the appliance at the mains isolating spur. Normally operating boiler Turn the boiler OFF positioning the function selec- (see the previous table for details) tor A as indicated in Fig. 5. C.h. operation Frost protect operation Faulty c.h.

  • Page 19: C.h. Only Mode Setting

    Electronic control/ignition p.c.b. By turning the knob B, the lock ---out signal lamp Keep pressed the reset button D for about 10 sec- E blinks quickly (2 per seconds) indicating that onds (Fig. 12) until the lock ---out signal lamp E the setting has changed and must be memo- blinks.

  • Page 20: Reignition Frequency Setting

    Electronic control/ignition p.c.b. four times for system boilers). At this point only the right By turning the knob B, the lock ---out signal lamp green light flashes. E blinks quickly (2 per seconds) indicating that the setting has changed and must be memo- M96A.24SR/...

  • Page 21: Checks

    Electronic control/ignition p.c.b. 8.10 OFF. Checks The boiler runs in c.h. mode and the lamps F give Check that the fuses are complete the indication as in Fig. 22. If the Electronic control/ignition p.c.b. does not supply any device (pump, fan, etc.) check that the fuses 14 (Fig.
  • Page 22 Electronic control/ignition p.c.b. Unscrew the four screws that hold the Electronic Attention control/ignition p.c.b. on to the control panel. After installing the Electronic control/ignition p.c.b. : Remove it by lifting its rear edge and freeing it from any of the wiring. Make sure the c.h.

  • Page 23: Thermal Control In The " " Mode

    Electronic control/ignition p.c.b. 8.12 Thermal control in the ” ” mode Switch in the function mode Is primary circuit temperature higher than that selected? Request for heat from room thermostat? Circulator off Starts the circulator Operates motorised valve Operates motorised valve Ignition device off Supplies the ignition device Fig.

  • Page 24: Ignition And Control Sequence

    Electronic control/ignition p.c.b. 8.13 Ignition and control sequence Ignition request lock memorised? cancels lock Air pressure sensor at rest? starts fan Air pressure sensor at work? beginning of wait period presence of flame? Air pressure sensor at work? starts ignition discharges opens gas valve beginning of ignition period flame presence?

  • Page 25: Modulating Gas Valve

    Modulating gas valve Function The Modulating gas valve A in Fig. 1 controls the gas inflow to the boiler burner. Fig. 2 Adjustment For the pressure values refer to the Technical data section of the User manual and Installation instruc- tions Warning: isolate the boiler from the mains electricity...

  • Page 26: Checks

    Modulating gas valve Turn the boiler off and disconnect one of the two connectors (3 in Fig. 2). Start the boiler and rotate the minimum gas pres- sure adjustment (1 in Fig. 2) until you obtain the required pressure (by rotating clockwise the pressure increases).

  • Page 27: Primary Circuit Flow Switch

    Primary circuit flow switch 10.1 Function Boiler OFF Boiler ON The Primary circuit flow switch (A in Fig. 1) function is to detect water flow rate through the primary hydraulic Fig. 2 circuit of the boiler. Electrical check It is possible to verify the general operation of the switch by measuring the electric resistance between the con- tacts C.

  • Page 28: Expansion Vessel And

    Primary circuit flow switch Unscrew the four screws E (see Fig. 5) open the sion vessel can be changed without removing the boiler. hydraulic operator and remove the membrane F. Warning: isolate the boiler from the mains electricity supply before removing any covering or component.

  • Page 29: Temperature Probe

    Temperature probe 12.1 Function 12.2 Checks The Temperature probe has the function of converting Temperature---resistance relationship the temperature of the water in the hydraulic circuit Warning: isolate the boiler from the mains where it is installed into an electrical signal (resistance). electricity supply before removing any The relation between temperature and electrical resis- covering or component.

  • Page 30: Function

    By---pass valve 13.2 Removal 13.1 Function Warning: isolate the boiler from the mains The By---pass valve A in Fig. 1 is located between the electricity supply before removing any c.h. water flow and return and its function is that of guar- covering or component.

  • Page 31: Fan And Air Pressure Sensor

    Fan and Air pressure sensor 14.1 Function The function of the Fan A (Fig. 1 and Fig. 2) is to force the products of combustion through the condensing heat exchanger to the outside air via the flue system. The Fan is supplied by the full sequence ignition device at the beginning of the ignition cycle.

  • Page 32: Removal Of The Fan

    Fan and Air pressure sensor The ignition is not allowed and appropriate fault Warning: After cleaning or replacement as indication is given (see section 8.4) detailed above, if it deemed necessary to undertake a combustion analysis, refer to 14.3 the appropriate chapter Maintenance of the Removal of the Fan installation instructions manual.

  • Page 33: Ignition And Detection Electrodes

    Ignition and detection electrodes Check the integrity of the detection electrode and ensure that its metallic edge is correctly placed over the ramp of the burner. 15.1 Function Check the connection wires. Three electrodes are fitted on the burner. Two of them are the ignition electrodes and are fitted near the front Warning: isolate the boiler from the mains part of the burner.

  • Page 34: Safety Thermostat

    Safety thermostat a temperature below that of the safety thermostat and no overheat intervention should occur. 16.1 Function Warning: isolate the boiler from the mains The safety thermostat A in Fig. 1 and Fig. 2 is a device electricity supply before removing any that senses the temperature of the primary circuit water covering or component.

  • Page 35: Flue Temperature Probe Ntc

    Flue temperature probe NTC In the case that the temperature of the combustion products reaches a potentially dangerous value, it stops the boiler operation. It is therefore allowed the 17.1 Function use of plastic materials for the flue outlet pipes and The Flue temperature probe NTC A in Fig.
  • Page 36 Flue thermostat Assemble the Flue temperature probe NTC carry- ing out the removal operations in reverse se- quence.

  • Page 37: Function

    Condensate trap When the condensate reaches the lower part of the ex- changer obstructs the the exhaust gas flow and the boiler stops (no signal from the air pressure sensor). 18.1 Function The condensate trap A in Fig. 4 and Fig. 5 allows the 18.2 Removal discharge of the condensate via the condensate drain...

  • Page 38: Short Spare Parts List

    Short spare parts list Key G.C. part no. Description Q.ty Manufac- Manufacturer’s reference turer part no. Polidoro 173---148 Burner (mod. M96A.24SR/...) KI1004 102 173---149 Burner (mod. M96A.28SR/...) KI1004 147 169---069 Injectors for natural gas (mod. M96A.24SR/...) KI1064 505 Polidoro Injectors for natural gas (mod. M96A.28SR/...) 169---070 KI1064 506 Injectors for LPG (mod.
  • Page 39 Short spare parts list...
  • Page 40 *1796215510* 17962.1551.0 4908 40A4 UK Biasi UK Ltd Newman Park, Western Way Wednesbury, WS10 7BJ Sales Tel No: 0121 506 1340 Sales Fax No: 0121 506 1360 Service Tel No: 0121 506 1350 Service Fax No: 0121 506 1370 www.biasi.co.uk...

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Riva compact he mk2 m96a.28sr/c

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