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Biasi RIVA ADVANCE HE M110B.24SM/C, Service Manual

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Biasi RIVA ADVANCE HE M110B.24SM/C Service Manual Download Page 34

32

14

D.h.w. flow switch, filter and flow

limiter

14.1

Function

The d.h.w. flow switch

A

in Fig. 14.1 is a device that

generates an electrical signal when hot water is drawn.

A

Fig. 14.1

When the flow rate through the d.h.w. circuit reaches

about 2,5 litres/min’, the float 5 (Fig. 14.3) is dragged

upwards and the magnetic in it, getting closer to the

sensor 8 closes the electric contact.

B

C

D

Fig. 14.2

14.2

Description and location of parts

(Fig. 14.3)

1

Flow switch plug

2

O---ring

3

Flow limiter (M110B.32SM/... optional accessory)

4

Body

5

Float

6

Filter

7

Sensor holder spring

8

Sensor

5

6

4

3

2

1

8

7

Fig. 14.3

14.3

Checks

Warning: isolate the boiler from the mains

electricity supply before removing any

covering or component.

n

Sensor operation

1

Remove the front panel of the case.

2

Measure the electrical resistance at the leads of

the sensor. Without water being drawn, the con-

tact must be open. By opening a hot water tap the

contact must be close (electrical resistance zero

8

).

14.4

Removal of the

sensor

Warning: isolate the boiler from the mains

electricity supply before removing any

covering or component.

1

Remove the front panel of the case.

2

Disconnect the connectors

B

and remove the

sensor holder spring

C

(Fig. 14.2).

3

Remove the sensor.

14.5

Removal of the flow switch group and

d.h.w. circuit filter

Warning: isolate the boiler from the mains

electricity supply before removing any

covering or component.

1

Remove the front panel of the case and empty the

d.h.w. circuit.

2

Remove the sensor (see section 14.4).

3

Remove the fork

D

and pull up the flow switch

plug 1 with the help of a screwdriver.

4

To remove the filter from the flow switch group

separate the filter 6 from the body 4 (Fig. 14.3) by

levering it.

5

Reassemble the parts following the removing se-

quence in reverse order.

14.6

Flow limiter

The M110B.24SM/... model is factory fitted with a 10

litre/min. flow limiter.

Summary of Contents for RIVA ADVANCE HE M110B.24SM/C

Page 1: ... fan flue room sealed high efficiency gas boiler Service manual RIVA ADVANCE HE Models G C Appl No M110B 24SM C 47 583 11 M110B 32SM C 47 583 12 M110B 24SR C 41 580 07 Leave this manual adjacent to the gas meter ...

Page 2: ...e 27 11 1 Function 27 11 2 Description of the parts 27 11 3 Adjustment 27 11 4 Checks 28 11 5 Removal of the gas valve 28 12 Primary circuit flow switch 30 12 1 Function 30 12 2 Checks 30 12 3 Removal 30 13 Expansion vessel and temperature pressure gauge 31 13 1 Function 31 13 2 Checks 31 13 3 Removal of the expansion vessel 31 13 4 Removal of the temperature pressure gauge 31 14 D h w flow switch...

Page 3: ...verter valve Main circuit Flue temperature heat exchanger Condensate trap flow switch C h temp probe probe NTC Air box Gas restrictor Transformer Switch D h w Flow Spark Generator Condensing heat exchanger air purger valve C h pressure relief valve Safety thermal fuse Air hose Codensate trap 1 2 Hydraulic diagram Central heating c h operation Domestic hot water d h w operation C h water flow C h w...

Page 4: ... 2 2 lift the panel and remove it A Fig 2 2 To remove the side panels loosen the screws B and C Fig 2 3 bring the base of the panels away from the boiler and lift them freeing them from the top hooks B D C B Fig 2 3 bottom view of the boiler 2 3 Control panel Warning isolate the boiler from the mains electricity supply before removing any covering or component To gain access to the parts located i...

Page 5: ... panels of the case remove the screws G as indicated in Fig 2 6 and remove the lid 2 5 Emptying the primary circuit 1 Close the c h circuit flow and return cocks H Fig 2 7 H K Fig 2 7 bottom view of the boiler 2 Remove the front and right panels of the boiler 3 Open the drain tap I Fig 2 9 combi or Fig 2 10 only c h until the boiler is completely emptied 4 To help the draining of the primary circu...

Page 6: ...access and emptying hydraulic circuits 4 I Fig 2 9 I Fig 2 10 2 6 Emptying the d h w circuit 6 Close the d c w inlet cock K Fig 2 7 7 Open one or more hot water taps until the boiler has been completely emptied ...

Page 7: ...X2 X3 X5 X6 X7 X10 X11 X12 X13 X17 X23 X24 P3 X14 X15 SB1 X16 X22 X9 bu bn bu bn bu bu bn bn 1 2 3 L N gnye bu bn bn bk bu bn bu gnye bn bk bu bn gnye bu gnye bn bu rd wh bk bu bn gnye gnye bu bn bu gnye 1 4 5 bu bn bn bu wh og wh gy t t bk rd rd bk bu bu bu bu wh bu wh bu M rd bk bu gy wh rd gy bu wh bk t bk wh wh bk bk wh NO COM rd rd rd rd gy gy gy gy Transformer 230V 24V Spark Generator Time s...

Page 8: ...probe NTC Gas valve Safety thermostat Flue temperature probe NTC bu bn bu bn bu bu bn bn 1 2 3 L N gnye bu bn bn bk bu bn bu gnye bn bk bu bn gnye bu gnye bn bu bu bn gnye gnye bu bn bu gnye 1 4 5 bu bn bn bu wh og wh gy t bu bu bu bu M rd bk bu gy wh rd gy bu wh bk t bk wh wh bk bk wh NO COM rd rd rd rd gy gy gy gy Transformer 230V 24V Spark Generator bn brown bu blue bk black wh white rd red gy ...

Page 9: ...ion only during d h w operation 230 Safety thermostat 0 Fan 0 Main circuit LD1 LD2 LD3 F1 F2 F3 K1 K2 K3 K4 LD4 P6 T3 X1 X2 X3 X5 X6 X7 X10 X11 X12 X13 X17 X23 X24 P3 X14 X15 SB1 X16 X22 X9 Supply network 230 Pump 230 0 230 0 3 way diverter valve 230 Gas valve 24 Transformer 24 230 0 5 D h w Flow switch pressure switch ...

Page 10: ... gauge By pressing the reset push button the boiler turns on and operates cor rectly J J J J J J J J J J By pressing the reset push button the boiler starts the ignition cycle The burner doesn t light on and the boiler locks again J J J J J J J J J J J ON By pressing the reset push button the boiler starts the ignition cycle The burner lights on and the boiler locks again J J J J J The boiler does...

Page 11: ...c h mode J J J 8 J OFF Low d h w flow rate J J J Water leaks from the safety valve dur ing operation on c h J J J J J Water leaks from the safety valve when the boiler is off J J Note Useful information can be obtained also from the optical indication given by the appliance oper ation lights see section 9 4 1 Check for 230V between line L and neutral N Verify the integrity of supply cable plug and...

Page 12: ...iler 2 Remove the fan group rubber pipe gas pipe fol lowing the instructions from 1 to 6 in section 17 2 3 Disconnect the detection electrode connector D the ignition electrodes connector E and the earth wire F 4 Disconnect the fan connector G by pressing the plastic hook placed on the side of the connector Fig 5 2 5 Unscrew the nuts H Fig 5 2 6 Remove the fan burner group I 7 Empty the primary ci...

Page 13: ...s 15 Reassemble the Condensing heat exchanger carrying out the removal operations in reverse order Ensure to tight the nuts H Fig 5 2 firmly 5 3 Cleaning If there are deposits of dirt on the coil of the Condensing heat exchanger clean with a bristle paintbrush and re move the dust with a hoover Warning After cleaning or replacement as detailed above if it deemed necessary to undertake a combustion...

Page 14: ...s B Fig 6 3 which hold the exchanger to the brass group 4 Remove the electric actuator following the in structions in section 8 3 B A Fig 6 3 5 Remove the pump following the instructions in section 7 3 C A Fig 6 4 6 Completely unscrew the Allen key screws C Fig 6 4 which hold the exchanger to the plastic groups 7 Move the exchanger towards the rear of the boiler and extract it Reassemble the d h w...

Page 15: ...ove the front case panel Remove the air release plug from the pump Start the boiler and with a screwdriver turn the rotor in the direc tion of the arrow If there is a defect in starting the rotor will begin to turn normally only starting it manually n Check that the impeller is integral with the rotor With the boiler off remove the front and right hand side case panels lower the control panel and ...

Page 16: ... and remove the pump Reassemble the pump carrying out the removal oper ations in the reverse order When reassembling the pump check the correct location of the O ring gasket in the inlet port of the pump that seals the connection between the pump and the plastic group ...

Page 17: ... brass spindle when the boiler operates in c h mode In both figures the relationship between the position of the actuator and the resistance of the motor windings the motor must be disconnected from the wiring is also given B rd red bk black wh white 0 V 230 V Spindle B not visible Open circuit 9 4 Kohm wh rd bk 3 1 2 Fig 8 2 D h w mode B rd red bk black wh white 230 V 0 V Spindle B visible Open c...

Page 18: ...or J the c h flow connector and the d h w outlet connector I G F H J Fig 8 5 7 Remove the d h w heat exchanger see section 6 2 8 Remove the fork K and move away the pipe L Fig 8 6 9 Unscrew the screw M and remove the diverter group L L M Fig 8 6 Rear view of the boiler 10 Refer to the exploded view in Fig 8 7 to remove the internal parts of the three way diverter valve Fig 8 7 11 Reassemble the di...

Page 19: ...hich it is activated and supplies the fan regu lating its speed The Electronic control ignition p c b has a safety func tion and any incorrect interventions or tampering can result in conditions of dangerous functioning of the boiler The Electronic control ignition p c b can lock the func tioning of the boiler lock state and stop its functioning up to the resetting intervention The lock is signall...

Page 20: ...rately adjust the c h waterflow temperatureand d h w outlet temperature The temperature of the water is converted into an elec tric signal by means of temperature probes The user setting the desired temperature with the con trol panel knobs operates the variable elements 14and 17 in Fig 9 2 of the electronic control p c b If the power requested is lower than 40 of the maxi mum power output then co...

Page 21: ...mps 19 in Fig 9 2 are activated The following table gives the relationship between each of the possible lamp combinations and their meaning Normally operating boiler see the previous table for details C h operation D h w operation Frost protect operation D h w operation Excessive temperature on primary circuit Faulty c h temperature probe NTC Faulty d h w temperature probe NTC Faulty primary circu...

Page 22: ...r seconds indicating that the setting has changed and must be memo rised Knob position Maximum useful output in c h mode non condensing kW BTU h M110B 24SM M110B 24SR M110B 32SM 1 5 8 19 789 8 2 27 977 2 9 0 30 707 12 4 42 307 3 12 2 41 625 16 5 56 296 4 15 5 52 884 20 7 70 626 5 18 7 63 802 24 8 84 614 6 21 9 74 720 29 0 98 944 7 25 1 85 638 33 1 112 933 Tab 9 1 B 1 4 2 3 5 6 7 Fig 9 8 5 To memor...

Page 23: ...t button C for about 10 sec onds Fig 9 13 until the lock out signal lamp D blinks 5 Connect the c h temperature probe C E D A B Fig 9 13 6 Press the reset button C repeatedly 2 times until the lamps E give the indication as in Fig 9 14 boiler mode Where Lamp OFF Lamp ON Fig 9 14 At this step it is possible to visualize the current setting by keeping the reset button C pressed for more than 5 secon...

Page 24: ...is set for natural gas If the boiler is fed with different gas type go through the Gas conversion operations described in the In stallation manual If an external temperature probe optional is fitted the coefficient K has also to be set as described in the Commissioning chapter of the installation man ual 1 Gain access to the parts located inside the con trol panel as explained in the section 2 3 o...

Page 25: ...cribed at step 3 turn the knob half a turn and re insert the spindle 12 Make sure that the settings comply with the in dications given in section 9 5 13 Operate the boiler and close the gas inlet cock so that the boiler goes into the safety lock out state Verify the correct operation of the boiler reset but ton by pressing and releasing it Warning After cleaning or replacement as detailed above if...

Page 26: ...r than 110 C YES NO beginning of wait period flame presence End of wait period YES NO YES starts ignition discharges Opens gas valve beginning of ignition period flame presence YES interrupts ignition discharges gas valve open fan runs End of ignition period NO NO YES closes gas valve stops fan interrupts ignition discharges memorizes lock turns on lock out light reset push button pressed flame pr...

Page 27: ...ck Is fan rpm exact NO YES Is flue temperature higher than 110 C YES NO beginning of wait period flame presence End of wait period YES NO YES starts ignition discharges Opens gas valve beginning of ignition period flame presence YES interrupts ignition discharges gas valve open fan runs End of ignition period NO NO YES closes gas valve stops fan interrupts ignition discharges memorizes lock turns ...

Page 28: ...g out the re moval operations in the reverse order After reassembling ensure the wires are correctly connected see Fig 10 2 larger connector larger connector smaller connector smaller connector clamp for fitting the transformer Fig 10 2 10 2 Check the transformer Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove the Transformer see sect...

Page 29: ...se 4 Open the gas inlet valve 5 Turn on the electricity supply to the boiler switch ing on the fused spur isolation switch The appliance operation light on the left will flash every 4 seconds 6 Set the function knobs as illustrated in Fig 11 4 7 Open at least one hot water tap fully 8 Read the inlet pressure value and ensure that it is within the limits given in the table Gas supply pressures of t...

Page 30: ...alyser to give a stable reading 24 Read the CO2 value It should be between 9 0 and 9 8 natural gas G20 or between 10 0 and 11 0 LPG G31 To adjust the CO2 value rotate screw 1 Fig 11 2 by rotating it clockwise the CO2 de creases 25 Switch off the boiler and turn off the hot water tap s 26 Close the air flue sampling points 27 After adjustment fit the protective brass plug 2 Fig 11 2 Important after...

Page 31: ... out the removal operations in reverse order Before to fit a new valve it is advisable to pre set it as hereafter explained 8 Remove the brass plug and turn the plastic screw inside it fully clockwise until it stops Do not over tight 9 Turn it counter clockwise 2 and 3 4 turns 10 Adjust the gas valve using the flue analyser as de scribed in section 11 3 After any service operation on the component...

Page 32: ...r in d h w or c h mode 3 Looking through the switch box verify the position of the lever B referring to Fig 12 2 B Boiler OFF Boiler ON Fig 12 2 n Electrical check It is possible to verify the general operation of the switch by measuring the electric resistance between the con tacts C and N O of the switch 1 Remove the switch as explained in section NO TAG 2 Measure the electrical resistance betwe...

Page 33: ...User manual and installation instructions for the correct value 13 3 Removal of the expansion vessel If there is at least 400 mm clearance above the boiler and the rear exit flue can be easily removed the expan sion vessel can be changed without removing the boiler Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove the front and left han...

Page 34: ...r Without water being drawn the con tact must be open By opening a hot water tap the contact must be close electrical resistance zero 8 14 4 Removal of the sensor Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove the front panel of the case 2 Disconnect the connectors B and remove the sensor holder spring C Fig 14 2 3 Remove the sensor ...

Page 35: ... are available Nominal flow rate litres min Colour 10 Blue 12 Red 14 Pink To install the flow limiter 1 Remove the flow switch group as explained in the section 14 5 2 Separate the flow switch plug 1 from the body 4 levering with a screwdriver one of the two hooks 4 1 Fig 14 4 3 Insert the flow limiter 3 as shown in Fig 14 3 4 Reassemble the group following the above se quence in reverse order ...

Page 36: ...erature probe B in Fig 15 2 and Fig 15 3 c h flow c h return d h w inlet d h w outlet A B Fig 15 2 15 2 Checks n Temperature resistance relationship Warning isolate the boiler from the mains electricity supply before removing any covering or component Disconnect the cable from the Temperature probe Measure the temperature of the pipe near the Tempera ture probe and check the electrical resistance ...

Page 37: ... of the case 2 Empty the d h w circuit of the boiler 3 Remove the electric connector D and unscrew the d h w Temperature probe B Fig 15 3 4 Reassemble the d h w Temperature probe carry ing out the removal operations in reverse order Warning to lubricate the O ring gaskets exclusively use a silicone base grease compatible to be in contact with foods and approved by the local water Authorities ...

Page 38: ...ear side of the div erter group A Fig 16 1 16 2 Removal Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove all the case panels 2 Empty the primary circuit of the boiler 3 Remove the diverter group as described in the section 8 4 of this manual 4 Unscrew the connector B and remove the by pass valve C Fig 16 2 Fig 16 3 C B Fig 16 2 C B Fig...

Page 39: ...fold C Fig 17 2 by pul ling it F G I D H J Fan gasket Fig 17 3 4 Disconnect the rubber pipe D Fig 17 3 E Fig 17 4 5 Unscrew the gas connector E Fig 17 4 6 Remove the fixing fork F and remove the gas pipe G Fig 17 3 7 Loosen without removing the screw H 8 Remove the screws I and the air box J Leave the air box with the air manifold clamped to the water pipe 9 Disconnect the fan connector K by press...

Page 40: ...ve all the case panels and the sealed chamber lid see section 2 2 Disconnect the ignition electrodes connector F and the earth wire G from the spark generator C Fig 18 1 and disconnect the detection elec trode connector H 3 Unscrew the screws I and remove the ignition electrodes B and the detection electrode D Fig 18 1 4 Assemble the Ignition and detection electrodes carrying out the removal opera...

Page 41: ...nel See warning note at the end of this chapter before to remove this part 1 Remove the Ignition and detection electrodes see section 18 2 2 Remove the burner see section 18 3 3 Remove the front insulation panel Fig 18 6 4 Assemble the new front insulation carrying out the removal operation in reverse order When fitting the new panel ensure that the elec trodes holes coincide with the holes of the...

Page 42: ...ires 18 7 Checks n Check of the spark generator Warning isolate the boiler from the mains electricity supply before removing any covering or component There is not a significant way to verify the integrity of the spark generator When the fan turns but the burner does not light a poss ible cause is a faulty spark generator and it is advisable to replace it to locate the fault n Check the position o...

Page 43: ...fer reddening and itching of the skin Fibre entry into the eye will cause foreign body irritation which can cause severe irritation to people wearing contact lenses Irritation to respiratory tract Precautions Dust goggles will protect eyes People with a history of skin complaints may be particularly susceptible to irritation High dust levels are only likely to arise following harsh abrasion In gen...

Page 44: ...ermostat and no overheat intervention should occur Warning isolate the boiler from the mains electricity supply before removing any covering or component n Electrical function 1 Remove all the case panels and the lid of the sealed chamber 2 Disconnect the safety thermostat and check its electrical function Normally no intervention the contact must be closed electrical resistance zero 8 19 3 Remova...

Page 45: ... opens the cir cuit and locks out the boiler In case of intervention of this safety device the heat ex changer part shown in Fig 20 3 may be damaged and must be replaced Fig 20 3 20 2 Removal Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove all the case panels and the sealed chamber lid 2 Disconnect the connector C from the Flue tem pe...

Page 46: ...hermostat 44 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 8 C Fig 20 4 ...

Page 47: ...ec trode in the combustion chamber thus causing the boiler lock out 21 2 Check the cleanness of the trap Unscrew the plug on the bottom of the trap and remove dirt eventually deposit 21 3 Removal Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove the front and left case panels 2 Disconnect the trap from the draining pipe 3 Using pliers r...

Page 48: ...55 100 Bertelli Partners H58 718 Electronic regulation p c b mod M110B 32SM 1 BI1955 101 8 E01 205 D h w heat exchanger M110B 24SM 1 BI1001 102 H05 161 D h w heat exchanger M110B 32SM 1 BI1161 100 9 H58 670 Pump 1 BI1911 103 10 H32 555 Primary circuit flow switch 1 BI1251 501 11 169 010 D h w flow switch 1 KI1042 107 12 E00 688 Main flow switch membrane 1 BI1011 103 13 E83 086 Three way diverter v...

Page 49: ...Short spare parts list 47 P5 1 5 3 4 2 6 9 7 14 16 20 19 21 8 11 15 17 10 12 13 18 ...

Page 50: ......

Page 51: ......

Page 52: ... 1340 2 2008 52A4 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 14 05 2008 1 ...

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