Biasi Activ A Plus 30C Service Manual
Activa plus series wall hung, fanflue, roomsealed, high efficiency gas boiler
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- User manual and installation instructions (88 pages) ,
- Service manual (48 pages) ,
- User manual and installation instructions (92 pages)
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Wall hung, fanflue, roomsealed, high efficiency gas boiler
Service manual
ActivA Plus
Models
Activ A Plus 30C
Activ A Plus 35C
Activ A Plus 16S
Activ A Plus 25S
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.
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Table of Contents
Related Manuals for Biasi Activ A Plus 30C
Summary of Contents for Biasi Activ A Plus 30C
- Page 1 Wall hung, fanflue, roomsealed, high efficiency gas boiler Service manual ActivA Plus Models Activ A Plus 30C Activ A Plus 35C Activ A Plus 16S Activ A Plus 25S 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.
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Page 3: Table Of Contents
Removal of the sensor......39 Wiring diagram Activ A Plus 30C - Activ A Plus 35C ..8 14.4... -
Page 4: Overall Information
ovERALL infoRmATion ovERALL infoRmATion 1.1 overall view Flue temperature probe NTC Condensing heat exchanger Safety thermostat Expansion vessel Ighition electrodes Detection electrode Pipe silencer Burner Airbox (air/gasmixer) Electronic controlbox Three way diverter valve D.h.w.heat exchanger Gas restrictor Condensate trap Main circuit pressure switch 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 6 Remove the terminal block lid F (Figure 2.7). 7 Free the hooks placed on the three sides indicated and rotate the lid towards left (Figure 2.9). figure 2.12 figure 2.9 2.6 Emptying the d.h.w. circuit 1 Close the d.c.w. -
Page 8: Diagrams
3.1 Wiring diagram Activ A Plus 30C - Activ A Plus 35C Three way Gas valve diverter valve Flame detection Ignition electrode electrodes Pump gnye gnye C.h. temperature probe NTC return Flue temp. probe NTC Safety thermal fuse D.h.w. -
Page 9: Wiring Diagram Activ A Plus 16S - Activ A Plus 25S
diAGRAmS 3.2 Wiring diagram Activ A Plus 16S - Activ A Plus 25S Three way Gas valve diverter valve Flame detection Ignition electrode electrodes Pump gnye gnye C.h. temperature probe NTC return Flue temp. probe NTC thermal fuse 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 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 -...
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Page 13: Display Diagnostic
fAuLT findinG 4.1 display diagnostic The display indications provide help in the diagnosis of fault fin- ding. The control panel display gives other information for the user. The following table gives fault code, error and the reson for the fault. E01 + RESET Lack of burner ignition on safety lockout E02 + RESET Safety thermostat intervention lockout E03 + RESET... -
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 fun- ction 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 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). 14 Remove the Condensing heat exchanger by levering it and sliding it forwards. -
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 ma- king 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 exchan- ger (during the d.h.w. -
Page 18: Removal Pump
PumP 7.3 Removal pump 7.4 Removal electrical capacitor Warning: isolate the boiler from the mains electricity Warning: isolate the boiler from the mains electricity supply before removing any covering or component. supply before removing any covering or component. 1 Remove the front and right hand side case panels. 1 Remove the front and right hand side case panels. -
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 hydraulic 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 gene- rated 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 00 = No power Er 99 ted with the complete 35 = Activ A Plus 25C range) 36 = Activ A Plus 30C 37 = Activ A Plus 35C 40 = Activ A Plus 16S 41 = Activ A Plus 25S...
- Page 25 P 14 00÷99 (0÷100%) factory set: natural gas (G20) 20 = Activ A Plus 25C 31 = Activ A Plus 30C 25 = Activ A Plus 35C 30 = Activ A Plus 16S 37 = Activ A Plus 25S Ignition power...
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Page 26: Checks
mAin ELECTRoniC ConTRoL/iGniTion P.C.b. 9.5 Checks 6 Re-assemble the Main electronic control/ignition p.c.b. fol- Check that the fuses are complete lowing the removal procedures in the reverse order. If the Main electronic control/ignition p.c.b. does not supply any device (pump, fan, etc.) check that the fuses 10 (Figure 9.2) are important complete. -
Page 27: 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 28: 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 29: Control Panel Electronic P.c.b
ConTRoL PAnEL ELECTRoniC P.C.b. 10 ConTRoL PAnEL ELECTRoniC P.C.b. Indicate the status of the scheduling re- quest Flashing: 10.1 function comfort program in process; reduced program in process; The day of the week is displayed hi- ghlighting the number with the following sequence: 1=Mon…... -
Page 30: Signal Displayed By Lcd
ConTRoL PAnEL ELECTRoniC P.C.b. funCTion Constantly illuminated: boiler antifreeze active Antifrostat In the case of incorrect pressure the value is Constantly illuminated: (system antifree- visualised with a flashing symbol ze active When pressure is achieved the symbol re- mains on for 15 s and then disappears. Flashing: SiGnAL diSPLAyEd by ThE LCd high pressure > 2.8 bar ON, 2.6 bar OFF;... -
Page 31: Info Modality
ConTRoL PAnEL ELECTRoniC P.C.b. 10.3 info modality 10.4 function modes setting modality The INFO mode allows the display of some information on the It is possible to select the various boiler control function modes boiler functioning status. In case ofmalfunctioning of the boiler, hereafter named “parameters”... - Page 32 ConTRoL PAnEL ELECTRoniC P.C.b. 1 Remove all the body panels (see section 2.2). 2 Gain access to the parts located inside the Interface elec- tronic p.c.b. as explained in the section 2.3 of this manual. 3 Remove all the wiring N, S, O e P connected to the Interface electronic p.c.b.
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Page 33: Gas Valve
GAS vALvE 11 GAS vALvE 11.3 Adjustment 11.1 function Warning: isolate the boiler from the mains electrici- The gas valve A in Figure 11.1 controls the gas inflow to the boiler ty supply before removing any covering or compo- burner. nent. Check the supply pressure before making any adjustment to the gas valve. - Page 34 % value. It should be between: model Type gas % value (range) Natural (G20) 8,7 - 9,3 Activ A Plus 30C Checking the minimum gas valve setting in domestic hot Activ A Plus 35C Propane (G31) 9,4 - 10,4 water mode Natural (G20) 8,7 - 9,3 16 Press keys G and H (Figure 11.5) at the same time until the...
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Page 35: Checks
(Figure 11.11) model Type gas % value (range) C.h. / d.h.w. function Natural (G20) 9,2 - 9,8 Activ A Plus 30C Activ A Plus 35C Propane (G31) 9,9 - 10,8 Natural (G20) 9,2 - 9,8 Activ A Plus 16S Activ A Plus 25S... -
Page 36: Removal Of The Gas Valve
GAS vALvE 11.5 Removal of the gas valve 8 Remove the brass plug and turn the plastic screw inside it Warning: isolate the boiler from the mains electrici- fully clockwise until it stops. Do not overtight. ty supply before removing any covering or compo- nent. -
Page 37: 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 38: 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 39: 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 14.3 Removal of the sensor LimiTER Warning: isolate the boiler from the mains electrici- 14.1 function ty supply before removing any covering or compo- The d.h.w. flow switch A in Figure 14.1 is a device that generates nent. -
Page 40: 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. Remove the front panel of the case and empty the d.h.w. circuit. 2 Remove the fork D and pull up the flow switch plug E (Figure 14.3) with the help of a screwdriver. -
Page 41: Temperature Probe
TEmPERATuRE PRobE 15 TEmPERATuRE PRobE 15.2 Checks 15.1 function Temperature-resistance relationship The Temperature probe has the function of converting the tempe- rature of the water in the hydraulic circuit where it is installed into Warning: isolate the boiler from the mains electrici- an electrical signal (resistance). -
Page 42: Removal Of The D.h.w. Temperature Probes
TEmPERATuRE PRobE 15.4 Removal of the d.h.w. Temperature probes Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- nent. Removal of the d.h.w. outlet Temperature probe Removal of the d.h.w. intlet Temperature probe 1 Remove the front panel of the case and lower the control 6 Remove the front panel of the case and lower the control panel. -
Page 43: By-Pass Valve
by-PASS vALvE 16 by-PASS vALvE 16.2 Removal 16.1 function Warning: isolate the boiler from the mains electrici- The By-pass valve A in Figure 16.1 is located between the c.h. ty supply before removing any covering or compo- water flow and return and its function is that of guaranteeing a nent. minimum flow across the primary heat exchanger if the circula- 1 Remove all the case panels. -
Page 44: Fan And Air Box
fAn And AiR box 3 Disconnect the air manifold C (Figure 17.2). 17 fAn And AiR box 4 Disconnect the rubber pipe D. 5 Unscrew the gas connector E. 17.1 function The function of the Fan A (Figure 17.1) is to force the mixture of 6 Remove the fixing fork F and remove the gas pipe G. -
Page 45: Ignition, Detection Electrodes And Burner
iGniTion And dETECTion ELECTRodES 18 iGniTion, dETECTion ELECTRodES 18.2 Removal of the ignition and detection elec- And buRnER trodes 18.1 function Warning: isolate the boiler from the mains electrici- Three electrodes are fitted on the fan-burner group. ty supply before removing any covering or compo- Two of them, fitted on the right side of the fan-burner group A, are nent. -
Page 46: Removal Of The Front Insulation Panel
iGniTion And dETECTion ELECTRodES 18.5 Removal of the rear insulation burner gasket See warning note at the end of this chapter before to remove this part. Air--- gas duct gasket Attention: Cover the inner of the condensing heat exchanger to avoid that dirt and debris fall in the coil. - Page 47 iGniTion And dETECTion ELECTRodES High dust levels are only likely to arise following harsh abrasion. 3,5 mm In general, normal handling and use will not present high risk, fol- 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 earth electrode or prolonged reddening of the skin.
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Page 48: 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 49: 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 (part 20.1 function shown in Figure 20.3) may be damaged and must be replaced. - Page 50 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 - 50 -...
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Page 51: 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 52: Short Spare Parts List
(mod. Activ A Plus 25S, Activ A Plus 16S) BI1313 102 Gas valve BI1313 103 SIT 848 Sigma 0848135 H50-189 Safety valve (mod. Activ A Plus 30C, Activ A Plus 35C) BI1181 100 Watts E83-013 Safety valve (mod. Activ A Plus 25S, Activ A Plus 16S) BI1131 100 Watts Main Electronic control/ignition p.c.b. - Page 53 ShoRT SPARE PARTS LiST figure 22.1 - 53 -...
- Page 56 *1796221010* 17962.2101.0 2711 56A4 Biasi UK Ltd Commercial Road Leamore Enterprise Park WALSALL WS2 7NQ Sales Tel. 01922 714600 Tech. Service Tel. 01922 714636 www.biasi.co.uk...
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