Wall hung fan flue room sealed gas boiler SERVICE MANUAL

Wall Hung Fan Flue Room Sealed Gas Boiler Service Manual-Free PDF

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Table of contents 10 Modulating gas valve 23,10 1 Function 23. 1 Overall information 2 10 2 Nomenclature of the parts 23. 10 3 Adjustment 23,1 1 Overall View 2,10 4 Checks 24. 1 2 Hydraulic diagram 2,10 5 Removal of the on off operators coils 24. 2 General access and emptying 10 6 Removal of the gas valve 24. hydraulic circuits 3,11 Primary circuit flow switch 25. 2 1 Nomenclature 3,11 1 Function 25,2 2 Body panels 3.
11 2 Checks 25,2 3 Control panel 3,11 3 Removal 25. 2 4 Access to the sealed chamber 4, 2 5 Emptying the primary circuit 4 12 Expansion vessel and. 2 6 Emptying the d h w circuit 4 temperature pressure gauge 26. 12 1 Function 26,3 Diagrams 5,12 2 Checks 26, 3 1 Wiring diagram 5 12 3 Removal of the expansion vessel 26. 3 2 Circuit voltages 6 12 4 Removal of the temperature pressure. 4 Fault finding 7,13 D h w flow switch filter and flow limiter 27. 5 Primary heat exchanger 9 13 1 Function 27, 5 1 Characteristics 9 13 2 Nomenclature and location of parts 27.
5 2 Removal 9 13 3 Checks 27, 5 3 Cleaning 9 13 4 Removal of the flow switch sensor 27. 13 5 Removal of the flow switch group, 6 D h w heat exchanger 10 and d h w circuit filter 28. 6 1 Function 10 13 6 Flow limiter 28,6 2 Removal 10. 14 Temperature probe 29,7 Pump 11 14 1 Function 29. 7 1 Function 11 14 2 Checks 29,7 2 Checks 11 14 3 Removal 29.
7 3 Removal 11,15 By pass valve 30,8 Three way diverter valve 12 15 1 Function 30. 8 1 Function 12 15 2 Removal 30, 8 2 Checks 12 16 Fan venturi device and Air pressure. 8 3 Removal of the electric actuator 12 switch 31, 8 4 Removal of the diverter group 16 1 Function 31. and its internal parts 13,16 2 Checks 31, 9 Electronic starting control p c b 14 16 3 Removal of the Fan 31. 9 1 Function 14 16 4 Inspection and removal of the venturi. 9 2 Selection and adjustment devices 14,16 5 Removal of the Air pressure switch 32.
9 3 Checking the temperature 15, 9 4 Operation lamps 15 17 Ignition and detection electrodes 33. 9 5 Setting the boiler control function modes 16 17 1 Function 33. 9 6 Reignition frequency setting 16 17 2 Checks 33. 9 7 Ignition gas pressure adjustment 16 17 3 Removal 33. 9 8 Adjustment of useful c h output 17,9 9 Gas conversion 18 18 Safety thermostat 35. 9 10 Checks 19 18 1 Function 35, 9 11 Removal of the electronic control p c b 19 18 2 Checks 35. 9 12 Thermal control in the mode 21 18 3 Removal 35. 9 13 Thermal control in the mode 22 19 Short spare parts list 37. 1 Overall information,1 1 Overall View,Air pressure. switch Fan,Main heat Expansion,exchanger vessel,thermostat.
Combustion,electrodes,Diverter valve Automatic,air release D h w. valve heat exchanger,Main circuit,flow switch D h w temp. Gas valve Pump,panel flow switch,1 2 Hydraulic diagram. Central heating c h operation Domestic hot water d h w operation. C h C h D h w D h w,water return water flow inlet outlet. 2 General access and emptying,hydraulic circuits,2 1 Nomenclature.
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. 1 Right side panel,2 Front panel,3 Control panel lid. 4 Control panel cover,5 Service panel,Fig 3 bottom view of the boiler. 6 Left side panel,2 3 Control panel, 2 2 Body panels Warning isolate the boiler from the mains. electricity supply before removing any, Warning isolate the boiler from the mains covering or component.
electricity supply before removing any, covering or component To gain access to the parts located inside the control. panel proceed as follows,1 Remove the front panel of the case. For the most part of the check and maintenance oper. ations it is necessary to remove one or more panels of 2 Loosen the screws B and C Fig 3. 3 Remove the screws D, The side panels can be removed only after the removal 4 Move the lower part of the side panels as indi. of the front panel cated in Fig 4 and pull the control panel. When completely pulled out the panel can rotate, To remove the front panel remove screws A Fig 2 lift 45 downwards to facilitate the service oper. the panel and remove it ations on the internal parts. 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. 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,2 5 Emptying the primary circuit. 1 Close the c h circuit flow and return cocks H,Fig 4 Fig 7. 5 Remove the screws E and remove the service,panel Fig 5. 6 To gain access to the electronic regulation PCB,and the full sequence ignition device remove the. screws F and remove the control panel lid J,Fig 7 bottom view of the boiler.
2 Remove the front and right panels of the boiler, 3 Open the drain tap I Fig 8 until the boiler is com. pletely emptied,4 Close drain tap again once the emptying has. Fig 5 been completed,2 4 Access to the sealed chamber. 2 6 Emptying the d h w circuit,5 Close the d c w inlet cock J Fig 7. 6 Open one or more hot water taps until the boiler. has been completely emptied,3 Diagrams,3 1 Wiring diagram.
Wiring diagram for boiler equiped with full sequence ignition device type ceza. External controls Electrical Fan Air pressure Safety Flame detection ignition. terminal block supply terminal switch thermostat electrode electrodes. 3 2 1 L N gr,c n m m g v c g v c n n gr,Modulating gas valve. r 2 b c c COM n,3 g v m c n,DHW temperature DHW flow CH temperature Primary v. probe NTC switch probe NTC pressure switch Three way M. diverter valve,Time switch,m brown b white a orange. c blue r red g yellow,n black gr grey g v yellow green. 3 2 Circuit voltages,Eletric supply 3 way diverter.
terminal block valve,Pump Modulating Safety,Gas valve thermostat. during c h or d h w operation, Electrical voltages with burner on only during c h operation. only during d h w operation,4 Fault finding,Components to check. Section of the manual 6 7 2 8 2 9 10 10 4 11 2 13 5 14 2 15 16 2 17 2 18 2. note ref in brackets 2 3 4 5 8 9,Appliance operation. lamp green 1,Lock out signal lamp red,regulation ignition p c b.
Flue pipes,D h w circuit,D h w flow switch,Fuse regulation p c b. Gas valve modulating operator,Main circuit flow switch. Ignition electrode,Detection electrode,Safety valve. Pressure gauge,Power supply line,Gas supply line,C h circuit. D h w heat exchanger,Diverter valve,Function selectors reg p c b.
Gas valve on off operators,D h w filter,Main circuit temp probe. D h w temp probe,By pass valve,Fan and venturi device. Air pressure switch,Safety thermostat,Expansion vessel. The boiler does not start either in c h or J J J,d h w mode. By pressing the reset push button the J J J J J,boiler turns on and operates correctly 7.
By pressing the reset push button the J J J J,boiler starts the ignition cycle. The burner doesn t light on the igni,tion sparks continue and the boiler. locks again,By pressing the reset push button the J J J J J. boiler starts the ignition cycle,The burner lights on the ignition. sparks continue and the boiler locks,ON fast pu,The burner doesn t light either in c h or J J J J.
d h w mode, The burner doesn t light either in c h or J J J J J J J J. d h w mode,Fan doesn t turn,The boiler doesn t control the d h w J J. temperature,Turning the d h w temp adjustment,knob hasn t effect on the modulation of. The boiler operates correctly on c h,The boiler lights for a short while on c h J J. Normal operation on d h w function,ON ffast pulses.
Components to check, Section of the manual 6 7 2 8 2 9 10 10 4 11 2 13 5 14 2 15 16 2 17 2 18 2. note ref in brackets 2 3 4 5 8 9,Appliance operation. lamp green 1,Lock out signal lamp red,regulation ignition p c b. Flue pipes,D h w circuit,D h w flow switch,Fuse regulation p c b. Gas valve modulating operator,Main circuit flow switch.
Ignition electrode,Detection electrode,Safety valve. Pressure gauge,Power supply line,Gas supply line,C h circuit. D h w heat exchanger,Diverter valve,Function selectors reg p c b. Gas valve on off operators,D h w filter,Main circuit temp probe. D h w temp probe,By pass valve,Fan and venturi device.
Air pressure switch,Safety thermostat,Expansion vessel. The boiler does not supply d h w cold J J J,water from the tap. Regular operation in c h mode even,during a drawing off d h w. On c h mode the temperature of the J J,main circuit reaches 75 C and the c h. system does not heat,The boiler operates correctly on d h w.
Incorrect modulation J J J,Noisy bolier J J,The boiler operates correctly but the J J. gas pressure to the burner remains at,mal pulsess,Poor d h w temperature J J J J J. Low d h w flow rate J J J,Water leaks from the safety valve during J J J J. operation on c h,Water leaks from the safety valve when J J J. the boiler is off, Note stop valves 6 A jammed by pass could cause the over heating of the main.
Check the gas pressure at the inlet test point of the gas valve circuit and the intervention of the safety thermostat. 1 For details see section 9 4 of this manual see sect 10 3 with the boiler at rest and during operation and. Further useful information can be obtained by switching 7 Check the minimum gas pressure at the outlet test point of the. compare it with the values given on the installation booklet gas valve see sect 10 3 and compare it with the value given. the electronic control p c b in the service operation mode. see section 9 4 of this manual on the installation booklet. 4 Check for soundness and absence of obstructions Verify that. 8 Verify the cleanness of injectors, 2 Check for 230V between line L and neutral N the flue terminal is correctly installed see clearances and en. sure that exhaust gas is not sucked back by the boiler 9 Check the pressurization of the expansion vessel Refer to the. Verify the integrity of supply cable plug and external fuses installation manual for proper values. Check the polarity of line and neutral connection, 5 Check for soundness of the circuit and verify its correct filling 10 d h w pressure too high or flow rate too high If necessary in. 3 Verify the soundness of the gas supply pipe the position of see also installation manual sert a flow rate limiter 13 6. 5 Primary heat exchanger,5 1 Characteristics G, 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 F,5 Unscrew the connection H Fig 4 lift the pipe I. and rotate it right then move it downwards freeing. it from the heat exchanger connection, 6 Remove the motor of the three way diverter valve.
see section 8 3,7 Completely unscrew the connection J and rotate. the pipe K downwards freeing it from the heat ex,changer connection. 8 Remove the heat exchanger by sliding it for,9 Reassemble the boiler carrying out the removal. operations in reverse order Fit the clips F with, Fig 1 the arrow pointing upwards as illustrated in. The hydraulic circuit is composed of 8 elliptical pipes Fig 3. connected in parallel Fig 2,5 2 Removal,Warning isolate the boiler from the mains.
electricity supply before removing any,5 3 Cleaning. covering or component, 1 Empty the primary circuit of the boiler If there are deposits of soot or dirt between the blades. of the heat exchanger clean with a brush or non me. 2 Remove the case panels and the sealed chamber tallic bristle brush. lid see section 2, In any case avoid any actions that can damage the pro. 3 Remove the combustion chamber lid B by un tective varnish with which the exchanger has been cov. screwing the screws C Fig 3 ered, 3b For model M90E 28S and M90E 32S only re Warning After cleaning or replacement as. move the screw D and the plate E detailed above refer to section Combustion. 4 Remove the clips F and the safety thermostat G analysis check in the chapter Maintenance of. It is not necessary to disconnect it from the wiring the installation instructions manual. 6 D h w heat exchanger 6 2 Removal,Warning isolate the boiler from the mains.
6 1 Function electricity supply before removing any. The d h w heat exchanger A in Fig 1 allows the instan covering or component. taneous transfer of heat from the primary hydraulic cir 1 Remove the front and right hand side panels of. cuit to the water destined for d h w use the case, 2 Empty the primary circuit and the d h w circuit of. the boiler, 3 Remove the motor of the three way diverter valve. see section 8 3,A 4 Completely unscrew the two Allen key screws B. Fig 3 which hold the exchanger to the brass, 5 Move the exchanger towards the rear of the boiler. and extract it, Fig 1 Reassemble the d h w heat exchanger carrying out the.
removal operations in the reverse order,The schematic structure is shown in Fig 2. Attention When reassembling the exchanger be, sure to put the off center location securing pin indi. Wall hung fan flue room sealed gas boiler SERVICE MANUAL RIVA COMPACT Models 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 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 1

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