Biasi Advance Plus 25C Service Manual
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Biasi Advance Plus 25C Service Manual

Wall hung, fanflue, roomsealed, high efficiency gas boiler
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See also: User Manual and Installation Instructions
Wall hung, fanflue, roomsealed, high efficiency gas boiler
Service manual
Advance Plus
Models
Advance Plus 25C
Advance Plus 30C
Advance Plus 35C
Advance Plus 16S
Advance Plus 25S
Advance Plus 30S
Leave this manual adjacent to the gas meter
Warning:
Service / repairs must be carried out, only by a qualified Gas Safety
Registered Engineer, who will be responsible for the current Regulations for
gas appliances.
Note:
After servicing, complete the relevant Service Interval Record section of the
Benchmark Checklist of the user and installation manual.
G.C. Appl. No.
47-583-29
47-583-30
47-583-31
41-583-22
41-583-23
41-583-24

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  • Page 1 Wall hung, fanflue, roomsealed, high efficiency gas boiler Service manual Advance Plus Models G.C. Appl. No. Advance Plus 25C 47-583-29 Advance Plus 30C 47-583-30 Advance Plus 35C 47-583-31 Advance Plus 16S 41-583-22 Advance Plus 25S 41-583-23 Advance Plus 30S 41-583-24...

  • Page 3: Table Of Contents

    Removal of the sensor......35 Wiring diagram Advance Plus 25C - Advance Plus 30C - 14.4...

  • Page 4: Overall Information

    ovERALL INfoRmATIoN ovERALL INfoRmATIoN 1.1 overall view Flue temperature probe NTC Condensing heat Safety thermal exchanger air fuse purger valve Condensing heat exchanger Ighition electrodes Burner Detection electrode Expansion vessel Safety thermostat Airbox (air/gas mixer) Pipe silencer Electronic controlbox Condensate trap Three way diverter valve C.h.

  • Page 5: General Access And Emptying Hydraulic Cir

    GENERAL ACCESS ANd EmPTyING hydRAuLIC CIRCuITS GENERAL ACCESS ANd EmPTyING Pull the lower part of the front panel and lift it upwards (Figure hydRAuLIC CIRCuITS 2.3). 2.1 Nomenclature figure 2.3 To remove the side panels loosen the screws B (Figure 2.2) and C (Figure 2.3).

  • Page 6: Control Panel

    GENERAL ACCESS ANd EmPTyING hydRAuLIC CIRCuITS 2.3 Control panel 2.4 main electronic p.c.b. box Warning: isolate the boiler from the mains electrici- Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- ty supply before removing any covering or compo- nent.

  • Page 7: Emptying The Primary Circuit

    GENERAL ACCESS ANd EmPTyING hydRAuLIC CIRCuITS 2.6 Emptying the d.h.w. circuit 6 Remove the terminal block lid F (Figure 2.7). 1 Close the d.c.w. inlet cock H (Figure 2.10). 7 Free the hooks placed on the three sides indicated and rotate the lid towards left (Figure 2.9).

  • Page 8: Diagrams

    3.1 Wiring diagram Advance Plus 25C - Advance Plus 30C - Advance Plus 35C diverter valve Flame detection Ignition electrode electrodes Pump gnye gnye Flue temp. probe NTC Safety thermal fuse D.h.w. outlet temperature probe NTC Fuse 2AF 250VAC 5x20 D.h.w.

  • Page 9: Wiring Diagram Advance Plus 16S - Advance Plus 25S - Advance Plus 30S

    dIAGRAmS 3.2 Wiring diagram Advance Plus 16S - Advance Plus 25S - Advance Plus 30S Gas valve Flame detection Ignition electrode electrodes Pump gnye gnye Flue temp. probe NTC Safety thermal fuse Fuse 2AF 250VAC 5x20 Primary circuit pressure switch gnye C.h.

  • Page 10: Circuit Voltages

    dIAGRAmS 3.3 Circuit voltages during c.h. or d.h.w. operation Electrical voltages with burner on only during c.h. operation only during d.h.w. operation 3 way Pump D.h.w. diverter valve Flow switch Gas valve Safety Supply network Main circuit thermostat pressure switch figure 3.3 - 10 -...

  • Page 11: Fault Finding

    fAuLT fINdING fAuLT fINdING - 11 -...
  • Page 12 fAuLT fINdING - 12 -...

  • Page 13: Troubleshooting

    fAuLT fINdING 4.1 display diagnostic The display indications provide help in the diagnosis of fault find- ing. The control panel display gives other information for the user. The following table gives fault code, error and the reson for the fault. Er 01 + RESET Lack of burner ignition Er 02 + RESET Safety thermostat lockout Er 03 + RESET Other faults...

  • Page 14: Condensing Heat Exchanger

    CoNdENSING hEAT ExChANGER CoNdENSING hEAT ExChANGER 5.1 function The Condensing heat exchanger A in Figure 5.1 has the function of transferring heat produced from combustion of the gas and from the flue exhausted gas to the water circulating in it. figure 5.1 By reducing the combustion products temperature, the latent heat of the vapour is transferred to the water circuit, allowing an extra gain of useful heat.

  • Page 15: Cleaning

    CoNdENSING hEAT ExChANGER 11 Using pliers, remove the spring O moving it downwards and disconnect the rubber pipe P (Figure 5.3). 12 Unscrew the screws Q and remove the clamps (Figure 5.3). 13 Disconnect the two connectors R by pressing the plastic hook placed on the side of the connector (Figure 5.3).

  • Page 16: D.h.w. Heat Exchanger

    d.h.W. hEAT ExChANGER d.h.W. hEAT ExChANGER 6.1 function The d.h.w heat exchanger A in Figure 6.1 and Figure 6.3 allows the instantaneous transfer of heat from the primary hydraulic cir- cuit to the water destined for d.h.w use. figure 6.3 7 Move the exchanger towards the rear of the boiler and extract it to the left.

  • Page 17: Pump

    PumP PumP 7.1 function The pump A in Figure 7.1 and Figure 7.3 has the function of mak- ing the water in the main circuit circulate through the main con- densing heat exchanger and therefore through the c.h. system (during the c.h. function) or through the secondary heat exchang- er (during the d.h.w.

  • Page 18: Removal Electrical Capacitor

    PumP figure 7.4 4 Remove the capacitor connection block L freeing it from the hook M and pulling it as indicated by the arrow (Figure 7.5). figure 7.3 5 Loosen the connection G,and pull up and turn to the left the pipe H.

  • Page 19: Three Way Diverter Valve

    ThREE WAy dIvERTER vALvE ThREE WAy dIvERTER vALvE 8.1 function The diverter valve A (Figure 8.1) has the function of modifying 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 exchanger towards the c.h.

  • Page 20: Removal Of The Three Way Diverter Valve

    ThREE WAy dIvERTER vALvE 8.5 Removal of the diverter group 1 Remove the front and both side case panels. 2 Empty the primary circuit and the d.h.w circuit of the boiler. 3 Remove the electric actuator (section "Removal of the elec- tric actuator"...

  • Page 21: Main Electronic Control/Ignition P.c.b

    mAIN ELECTRoNIC CoNTRoL/IGNITIoN P.C.B. mAIN ELECTRoNIC CoNTRoL/IGNITIoN The fundamental function of the Main electronic control/ignition P.C.B. p.c.b. is that of controlling the boiler in relation to the external needs (i.e. heating the dwelling or heating the water for d.h.w. 9.1 function use) and operating in order to keep the temperature of the hy- draulic circuits constant.

  • Page 22: Checking The Temperature

    mAIN ELECTRoNIC CoNTRoL/IGNITIoN P.C.B. figure 9.2 1 Connector - ignition electrode. 2 Connector - flame detection electrode 3 Connector - controler fan 4 Connector - flue temperature probe NTC 5 Connector - d.h.w. temperature probe NTC, d.h.w. flow switch and external temperature probe (optional) 6 Connector - Primary circuit pressure switch 7 Connector - safety thermostat and c.h. temperature probe figure 9.3 8 Connector - remote control (optional) 9 Connector - display and function control / c.h. / d.h.w. tem-...

  • Page 23: Setting The Boiler Control Function Modes

    mAIN ELECTRoNIC CoNTRoL/IGNITIoN P.C.B. Normally, the result of the comparison between these two signals directly operates the fan speed adjusting the useful output gen- erated in order to stabilize the temperature of the exiting water. If during the d.h.w. mode operation, the temperature of the pri- mary circuit goes over 90°C, the useful output is automatically reduced so that the primary circuit cannot reach excessive tem- peratures.
  • Page 24 Boiler type (to be up- Pr 01 00 = No power Er 99 03 = C.h. max power dated with the complete 35 = Advance Plus 25C sweep---test range) 36 = Advance Plus 30C 04 = D.h.w. max power 37 = Advance Plus 35C...

  • Page 25: Checks

    mAIN ELECTRoNIC CoNTRoL/IGNITIoN P.C.B. PARAmETER dIGIT vALuES Maintenance intervals Pr 28 00 ÷ 48 (= months) (factory set 12 months) Pr 29 00 = No NTC probe (fac- Presence of domestic cold water temp. tory set) probe or set of inlet cold 01 = Yes NTC probe 04 ÷...

  • Page 26: Thermal Control In The

    mAIN ELECTRoNIC CoNTRoL/IGNITIoN P.C.B. 9.7 Thermal control in the mode Switch in the function mode Taking circulator off water from the domestic hot circulator on fan still water circuit? Is primary circuit Main circuit pressure stop circulator (3min) temperature higher than that switch consense? selected? lock memorised?

  • Page 27: Mode

    mAIN ELECTRoNIC CoNTRoL/IGNITIoN P.C.B. 9.8 Thermal control in the mode Switch in the function mode See functioning with the function Taking Request for heat from control in the mode water from the domestic hot room thermostat? water circuit? (sec. 9.7) circulator off fan still circulator on...

  • Page 28: Control Panel Electronic P.c.b

    CoNTRoL PANEL ELECTRoNIC P.C.B. 10 CoNTRoL PANEL ELECTRoNIC P.C.B. fuNCTIoN Absence of flow from temperature gradi- Er 14 + 10.1 function ent (>2k/s) Primary circuit temp. limit during D.h.w. Li 01 operation Boiler Stand-By (anti-freeze protection activated) Boiler waiting for heat request Boiler in summer mode (d.h.w.) figure 10.1 The primary circuit temperature is dis- played.

  • Page 29: Info Modality

    CoNTRoL PANEL ELECTRoNIC P.C.B. fuNCTIoN To get in function modes setting modality see section 9.4 Flame detection error (An flashing + er- ror flashing number) 10.5 Removal of the control panel electronic p.c.b Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- nent.

  • Page 30: Gas Valve

    GAS vALvE 11 GAS vALvE 11.3 Adjustment Warning: isolate the boiler from the mains electrici- 11.1 function ty supply before removing any covering or compo- The gas valve A in Figure 11.1 controls the gas inflow to the boiler nent. burner. Check the supply pressure before making any adjustment to the gas valve.
  • Page 31 % value. It should be between: model Type gas % value (range) Natural (G20) 9,3 - 9,9 Advance Plus 25C Advance Plus 35C Propane (G31) 10,0 - 10,9 figure 11.7 Advance Plus 30C Propane (G31) 9,2 - 9,8 Advance Plus 16S...

  • Page 32: Checks

    GAS vALvE C.h. / d.h.w. function figure 11.10 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 (C - Figure 11.2). Important: after the gas pressure checks and any adjust- ment operations, all of the test points must be sealed. 11.4 Checks Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo-...

  • Page 33: Primary Circuit Flow Switch

    PRImARy CIRCuIT fLoW SWITCh 12 PRImARy CIRCuIT fLoW SWITCh 12.3 Removal 12.1 function Warning: isolate the boiler from the mains electrici- The Primary circuit flow switch (A in Figure 12.1) function is to ty supply before removing any covering or compo- check the presence of water in the primary hydraulic circuit and nent.

  • Page 34: Expansion Vessel And Pressure Gauge

    ExPANSIoN vESSEL ANd PRESSuRE GAuGE 13 ExPANSIoN vESSEL ANd PRESSuRE 13.3 Removal of the expansion vessel GAuGE Warning: isolate the boiler from the mains electrici- 13.1 function ty supply before removing any covering or compo- The Expansion vessel (A in Figure 13.1 function is to allow for the nent.

  • Page 35: 14 D.h.w. Flow Switch, Filter And Flow Limiter

    d.h.W. fLoW SWITCh, fILTER ANd fLoW LImITER 14 d.h.W. fLoW SWITCh, fILTER ANd fLoW LImITER 14.1 function The d.h.w. flow switch A in Figure 14.1 is a device that generates an electrical signal when hot water is drawn. figure 14.3 1 Remove the front panel of the case. 2 Disconnect the connectors B and remove the sensor holder C (Figure 14.3).

  • Page 36: Removal Of The Flow Switch Group And D.h.w. Circuit Filter

    d.h.W. fLoW SWITCh, fILTER ANd fLoW LImITER 14.5 Removal of the flow switch group and d.h.w. circuit filter Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- nent. 1 Remove the front panel of the case and empty the d.h.w. cir- cuit.

  • Page 37: Temperature Probe

    TEmPERATuRE PRoBE 15 TEmPERATuRE PRoBE 15.2 Checks Temperature-resistance relationship 15.1 function The Temperature probe has the function of converting the tem- Warning: isolate the boiler from the mains electrici- perature of the water in the hydraulic circuit where it is installed ty supply before removing any covering or compo- into an electrical signal (resistance).
  • Page 38 TEmPERATuRE PRoBE 5 Reassemble the d.h.w. Temperature probe carrying out the removal operations in reverse order. Warning: to lubricate the o-ring gaskets exclusively use a silicone base grease compatible to be in con- tact with foods and approved by the local water Au- thorities.

  • Page 39: By-Pass Valve

    By-PASS vALvE 16 By-PASS vALvE Warning: to lubricate the o-ring gaskets exclusively use a silicone base grease compatible to be in con- 16.1 function tact with foods and approved by the local water Au- The By-pass valve A in Figure 16.1 is located between the c.h. thorities.

  • Page 40: Fan And Air Box

    fAN ANd AIR Box 17 fAN ANd AIR Box 3 Disconnect the air manifold E (Figure 17.2). 4 Disconnect the rubber pipe F. 17.1 function 5 Unscrew the gas connector G. The function of the Fan A (Figure 17.1) is to force the mixture of 6 Remove the fixing fork H and remove the gas pipe I.

  • Page 41: Ignition, Detection Electrodes And Burner

    IGNITIoN ANd dETECTIoN ELECTRodES 1 Remove all the case panels (see section 2). 18 IGNITIoN, dETECTIoN ELECTRodES 2 Disconnect the ignition electrodes connector D and the earth ANd BuRNER wire E (Figure 18.1) and disconnect the detection electrode connector F. 18.1 function 3 Unscrew the screws G and remove the ignition electrodes B Three electrodes are fitted on the fan-burner group.

  • Page 42: Removal Of The Front Insulation Panel

    IGNITIoN ANd dETECTIoN ELECTRodES must undergo a full analytical combustion performance check. burner gasket Air--- gas duct gasket 18.5 Removal of the rear insulation See warning note at the end of this chapter before to remove this part. Attention: Cover the inner of the condensing heat exchanger to avoid that dirt and debris fall in the coil.
  • Page 43 IGNITIoN ANd dETECTIoN ELECTRodES In general, normal handling and use will not present high risk, fol- 3,5 mm low good hygiene practices, wash hands before, touching eyes, consuming food, drinking or using the toilet. First aid - Medical attention must be sought following eye contact or prolonged reddening of the skin.

  • Page 44: Safety Thermostat

    SAfETy ThERmoSTAT 19 SAfETy ThERmoSTAT 19.3 Removal 19.1 function Warning: isolate the boiler from the mains electrici- The safety thermostat A in Figure 19.1 is a device that senses ty supply before removing any covering or compo- the temperature of the primary circuit water which flows in the nent.

  • Page 45: Flue Temperature Probe Ntc And Safety Ther

    fLuE TEmPERATuRE PRoBE NTC ANd SAfETy ThERmAL fuSE 20 fLuE TEmPERATuRE PRoBE NTC ANd Reaching the breakdown temperature it opens the circuit and SAfETy ThERmAL fuSE locks out the boiler. In case of intervention of this safety device the heat exchanger 20.1 function (part shown in Figure 20.3) may be damaged and must be re- The Flue temperature probe NTC A in Figure 20.1 and Figure...
  • Page 46 fLuE TEmPERATuRE PRoBE NTC ANd SAfETy ThERmAL fuSE 12500 12000 11500 11000 10500 10000 9500 9000 8500 8000 7500 7000 6500 6000 5500 5000 4500 4000 3500 3000 2500 2000 1500 1000 °C 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 figure 20.4 - 46 -...

  • Page 47: Condensate Trap

    CoNdENSATE TRAP 21 CoNdENSATE TRAP 21.1 function 21.3 Removal The condensate trap A in Figure 21.1 and Figure 21.2 allows the discharge of the condensate via the condensate drain pipe Warning: isolate the boiler from the mains electrici- avoiding in the mean time the escape of combustion products. ty supply before removing any covering or compo- A plastic ball closes the trap outlet in case that the trap is empty.

  • Page 48: Short Spare Parts List

    Q.ty part no. part no. reference Burner BI1293 100 (mod. Advance Plus 25C, Advance Plus 25S, Advance Plus 16S) Burner BI1293 101 (mod. Advance Plus 30C, Advance Plus 35C, Advance Plus 30S) Expansion vessel BI1462 100 H58-660 Condensing heat exchanger BI1432 101 (mod.
  • Page 49 ShoRT SPARE PARTS LIST figure 22.1 - 49 -...
  • Page 50 NoTE - 50 -...
  • Page 52 *1796222000* 17962.2200.0 1512 52A4 Biasi uK Ltd Commercial Road Leamore Enterprise Park WALSALL WS2 7NQ Sales Tel. 01922 714600 Tech. Service Tel. 01922 714636 www.biasi.co.uk...

This manual is also suitable for:

Advance plus 25sAdvance plus 30sAdvance plus 30cAdvance plus 35cAdvance plus 16s

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