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Wall hung, fanflue, roomsealed, high efficiency gas boiler
Service manual
ANTARES
Product name
ANTARES 25C
ANTARES 30C
ANTARES 35C
Leave this manual adjacent to the gas meter
Warning:
Service / repairs must be carried out, only by a qualified Gas Safe 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.
Models
M300V.2025 SM
M300V.2530 SM
M300V.3035 SM
G.C. Appl. No.
47-583-52
47-583-53
47-583-54
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Summary of Contents for Biasi ANTARES 25C
- Page 1 Wall hung, fanflue, roomsealed, high efficiency gas boiler Service manual ANTARES Product name Models G.C. Appl. No. ANTARES 25C M300V.2025 SM 47-583-52 ANTARES 30C M300V.2530 SM 47-583-53 ANTARES 35C M300V.3035 SM 47-583-54 Leave this manual adjacent to the gas meter...
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Page 3: Table Of Contents
TABLE OF CONTENTS 1 OVERALL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . .4 12 PRIMARY CIRCUIT PRESSURE SWITCH . -
Page 4: Overall Information
OVERALL INFORMATION OVERALL INFORMATION 1 .1 Overall View Flue temperature probe NTC and Safety thermal fuse Condensing heat exchanger Burner Expansion Ighition/Detection vessel electrode NTC heating delivery probe - NTC maximum temperature Air/gas mixer C.H. temperature return probe NTC Condensate trap Main circuit C.H. -
Page 5: General Access And Emptying Hydraulic
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 "7" (Figure 2.2) and "8"... -
Page 6: General Access And Emptying Hydraulic Circuits
GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS 2 .4 Main electronic p .c .b . box Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- nent . Terminal block lid removal To gain access to the parts located inside the control panel pro- ceed as follows: 1 Remove the front panel of the case. -
Page 7: Emptying The Primary Circuit
GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS 2 .5 Emptying the primary circuit 2 .6 Emptying the D .H .W . circuit 1 Close the C.H. circuit flow and return cocks "18" (Figure 2.10). 1 Close the D.H.W. inlet cock "19" (Figure 2.10). 2 Open one or more hot water taps until the boiler has been completely emptied. -
Page 8: Diagrams
DIAGRAMS DIAGRAMS 3 .1 Wiring diagram M300V SM C.h. temperature Three way probe NTC Electric supply Pump C.h. temperature diverter valve Flue temp. flow probe NTC probe NTC Safety return thermostat thermal fuse D.h.w. flow D.h.w. outlet switch temperature probe NTC Primary circuit pressure transducer Gas valve... -
Page 9: Circuit Voltages
DIAGRAMS 3 .2 Circuit voltages during C.H. or D.H.W. operation Electrical voltages or frequency only during C.H. operation with burner on only during D.H.W. operation 3 way Safety Main circuit Pump D.h.w. diverter valve Supply network Gas valve thermostat Flow switch pressure switch Figure 3 .2 - 9 -... -
Page 10: Fault Finding
FAULT FINDING FAULT FINDING - 10 -... - Page 11 FAULT FINDING - 11 -...
- Page 12 FAULT FINDING - 12 -...
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Page 13: Display Diagnostic
FAULT FINDING 4 .1 Display diagnostic FUNCTION The display indications provide help in the diagnosis of fault find- System fails to control combustion and exits ing. 65 + modulator control parameters. The control panel display gives other information for the user. 68 + The following table gives fault code, error and the reason for the Probable low gas pressure. -
Page 14: Displaying In Info Mode
FAULT FINDING malfunction, provide this information to the service centre so that 6 Press key "D" (Figure 4.1) again to highlight the value to be they can identify the cause. changed. 7 Press key "F" or "G" (Figure 4.1) to select the alarm history index (Figure 4.6). -
Page 15: Accessing The "Service" Menu (Installer)
FAULT FINDING 1 Press key "D" (Figure 4.11) to access the main menu (Figure Information 4.12). Gas type Menu Delivery temperature °C Clock and programmes [...] DHW temperature °C Information [...] Set heating °C Fault history [...] Set DHW °C General settings [...] Outdoor temperature... -
Page 16: Programming The Maintenance Period
FAULT FINDING "Service" level or key "E" to exit (return to previous level). changed. Maintenance "Service" level remains active while browsing the menus and for 4 more minutes after returning to the Select number of months main screen . If the appliance is switched off and back on, the menu automatically returns to User level . -
Page 17: Condensing Heat Exchanger
CONDENSING HEAT EXCHANGER CONDENSING HEAT EXCHANGER 5 .1 Function The Condensing heat exchanger "1" in Figure 5.1 has the func- tion 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 18: Cleaning
CONDENSING HEAT EXCHANGER 5 .3 Cleaning If there are deposits of dirt on the coil of the Condensing heat exchanger, clean with a bristle paintbrush and remove the dust with a hoover. Warning: After cleaning or replacement as detailed above, it is deemed necessary to undertake a com- bustion analysis as detailed in chapter "11 .3 Adjust- ment - Chimney Sweep Function"... -
Page 19: H .W . Heat Exchanger
D.H.W. HEAT EXCHANGER D .H .W . HEAT EXCHANGER 6 .1 Function The D.H.W. heat exchanger "1" in Figure 6.1 and Figure 6.3 al- lows the instantaneous transfer of heat from the primary hydrau- lic circuit to the water destined for D.H.W. use. Figure 6 .3 6 Move the exchanger towards the rear of the boiler and extract it to the left. -
Page 20: Pump
PUMP PUMP 7 .2 Removal pump head 7 .1 Function Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- The pump "1" in Figure 7.1 and Figure 7.2 has the function of nent . making the water in the main circuit circulate through the main condensing heat exchanger and therefore through the C.H. -
Page 21: Three Way Diverter Valve
THREE WAY DIVERTER VALVE THREE WAY DIVERTER VALVE 8 .1 Function The diverter valve "1" (Figure 8.1) has the function of modifying the hydraulic circuit of the boiler by means of an electric com- mand 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 22: Removal Of The Three Way Diverter Valve
THREE WAY DIVERTER VALVE Warning: Please note the electric actuator is ener- 5 Unscrew the connector "8" (Figure 8.6), the C.H. flow con- gized 240VAC even if the boiler is in a standby con- nector and the D.H.W. outlet connector. dition . -
Page 23: 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. use) and operating in order to keep the temperature of the hy- 9 .1 Function draulic circuits constant. -
Page 24: Checking The Temperature
MAIN ELECTRONIC CONTROL/IGNITION P.C.B. 1 2 3 Figure 9 .2 1 Connector - electric supply p.c.b. 2 Fuse F1 3,15 AF 3 Connector - 3 way diverter valve 4 Connector - pump 5 Connector - controller fan, flue temperature probe NTC, safety thermostat and C.H. -
Page 25: Setting The Boiler Control Function Modes
MAIN ELECTRONIC CONTROL/IGNITION P.C.B. erated in order to stabilize the temperature of the exiting water. To do this: If during the D.H.W. mode operation, the temperature of the pri- Following the procedure described in paragraph "Accessing the mary circuit goes over 90°C, the useful output is automatically "Service"... -
Page 26: Checks
MAIN ELECTRONIC CONTROL/IGNITION P.C.B. 6 Press key "D" (Figure 9.7) to access the selected menu (Fig- 2 Gain access to the parts located inside the Main electronic ure 9.12). p.c.b. box as explained in the section "2.4 Main electronic p.c.b. box" on page 6 of this manual. General settings 3 Unscrew the screws "1"... -
Page 27: Parameters Setting
MAIN ELECTRONIC CONTROL/IGNITION P.C.B. 9 .8 Parameters setting PARAMETER MENU ITEM MODEL VALUE ANTARES 25C (M300V.2025 SM) ANTARES 30C Menu > Assistance > Boiler > Combustion > Model (M300V.2530 SM) ANTARES 35C (M300V.3035 SM) NG (CH4) Menu > Assistance > Boiler > Combustion > Gas type LG (G31) Menu >... - Page 28 Menu > Assistance > Boiler > Combustion > Fan rpm max 6800 rpm Menu > Assistance > Boiler > Combustion > Fan rpm min 1000 rpm ANTARES 25C 3900 rpm (M300V.2025 SM) ANTARES 30C Menu > Assistance > Boiler > Combustion > Fan rpm acc.
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Page 29: Thermal Control In The
MAIN ELECTRONIC CONTROL/IGNITION P.C.B. 9 .9 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 30: Mode
MAIN ELECTRONIC CONTROL/IGNITION P.C.B. 9 .10 Thermal control in the mode Switch in the function mode See functioning with the function Taking Request for heat from water from the domestic hot control in the mode room thermostat? water circuit? (sec. 9.7) circulator off fan still circulator on... -
Page 31: Control Panel Electronic P.c.b
CONTROL PANEL ELECTRONIC P.C.B. 10 CONTROL PANEL ELECTRONIC P .C .B . SIGNAL DISPLAYED BY THE LCD FUNCTION 10 .1 Function Safety lockout due to failed ignition. Lockout due to safety thermostat. 1.0bar Generic lockout. °C °C Pump circulation failure, insufficient system Thursday 30/11/2023 - 20:30 pressure or pressure above 3 bar, water pressure sensor not connected. - Page 32 CONTROL PANEL ELECTRONIC P.C.B. FUNCTION FUNCTION Fault of cumulative gas valve timeout with- 1.3bar out flame. 44 + °C °C °C Heating water low pressure fault, pressure Boiler with central heating power request below minimum. with connected remote. Sunday 26/11/2023 - 14:07 50 + OT communication fault.
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Page 33: Gas Valve
GAS VALVE 11 GAS VALVE Warning: risk of electrocution . The boiler is live during the operations described in this section . 11 .1 Function Never touch any electrical parts . The gas valve "1" in Figure 11.1 controls the gas inflow to the boiler burner. -
Page 34: Automatic Calibration Of The Gas Valve
25 Read the CO % value. It should be between: Zones [...] Model ANTARES Type gas % value (range) Assistance [...] ANTARES 25C Natural (G20) 8,5 - 9,5 Figure 11 .6 ANTARES 30C Propane (G31) 9,5 - 10,5 ANTARES 35C 17 Press button "D"... -
Page 35: Checks
GAS VALVE 1 Turn on the boiler and operate for 2 minuets to pre-heat the Special functions flue, before commencing any adjustments. 2 Make sure that the room thermostat is in the “heat request” Deaeration [...] position. Chimney sweep function [...] 3 Open at least one hot water tap fully. Calibration complete [...] Fast calibration... -
Page 36: Removal Of The Gas Valve
GAS VALVE Pin 1 and 3 = 25 Ohm * After any service operation on the components of the gas circuit check all the connections for gas leaks . Pin 2 and 4 = 65 Ohm * Warning: After cleaning or replacement as detailed above, it is deemed necessary to undertake a com- *at ambient temperature. -
Page 37: Primary Circuit Pressure Switch
PRIMARY CIRCUIT FLOW SWITCH 12 PRIMARY CIRCUIT PRESSURE SWITCH 12 .2 Removal Warning: isolate the boiler from the mains electrici- 12 .1 Function ty supply before removing any covering or compo- nent . The Primary circuit pressure switch ("1" in Figure 12.1) function is to check the presence of water in the primary hydraulic circuit 1 Remove the front and right hand side panels of the case, turn and that the pressure is above the minimum. -
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- ty supply before removing any covering or compo- 13 .1 Function nent . The Expansion vessel ("1" in Figure 13.1) function is to allow for 1 Remove the front and right hand side panels of the case, turn the volume expansion of the C.H. -
Page 39: 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 14 .3 Removal of the sensor FLOW LIMITER Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- 14 .1 Function 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 . 1 Please remove the sensor first as previously described and ensure it remains dry. 2 Remove the front panel of the case and empty the D.H.W. -
Page 41: Ntc Heating Delivery Probe - Ntc Maximum
TEMPERATURE PROBE 15 NTC HEATING DELIVERY PROBE - 15 .2 Checks NTC MAXIMUM TEMPERATURE, C .H . Temperature-resistance relationship TEMPERATURE RETURN PROBE NTC, D .H .W . TEMPERATURE PROBE NTC Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- 15 .1 Function nent . -
Page 42: Removal Of The D.h.w. Temperature Probe Ntc
TEMPERATURE PROBE Figure 15 .4 15 .5 Removal of the D .H .W . temperature probe 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 lower the control panel. -
Page 43: By-Pass Valve
BY-PASS VALVE 16 BY-PASS VALVE reversing the order of removal. 16 .1 Function Warning: to lubricate the O-ring gaskets exclusively The By-pass valve "1" in Figure 16.1 is located between the C.H. use a silicone base grease compatible to be in con- water flow and return and its function is that of guaranteeing a tact with foods and approved by the local water Au- minimum flow across the primary heat exchanger if the circula-... -
Page 44: Fan And Air Box
FAN AND AIR BOX 17 FAN AND AIR BOX 17 .1 Function The function of the Fan "1" (Figure 17.1) is to force the mixture of air and gas into the burner. The function of the Air box "2" is to mix the gas and the air in the right proportion. -
Page 45: Ignition / Detection Electrode And Burner
IGNITION AND DETECTION ELECTRODES 18 IGNITION / DETECTION ELECTRODE 18 .2 Removal of the ignition / detection elec- AND BURNER trode Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- Electrodes disclaimer . nent . -
Page 46: Removal Of The Rear Insulation
IGNITION AND DETECTION ELECTRODES 3 Unscrew the nuts "5" (Figure 18.1) and remove the cover of the combustion chamber. 4 Remove the front insulation panel (see section "18.3 Remov- al of the front insulation panel" on page 45). 5 Unscrew the screws "7" (Figure 18.4) and remove the burner. 6 Assemble the burner carrying out the removal operation in reverse order. - Page 47 IGNITION AND DETECTION ELECTRODES Warning: isolate the boiler from the mains electrici- ty supply before removing any covering or compo- nent . 1 Remove all the case panels and the sealed chamber lid. 2 Check for the integrity of the insulation of wires which con- nect the electrode.
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Page 48: Flue Temperature Probe Ntc And Safety
FLUE TEMPERATURE PROBE NTC AND SAFETY THERMAL FUSE 19 FLUE TEMPERATURE PROBE NTC AND placed. SAFETY THERMAL FUSE 19 .1 Function The Flue temperature probe NTC and Safety thermal fuse "1" in Figure 19.1 and Figure 19.2 senses the temperature of the combustion products that flow through the condensing heat ex- changer. - Page 49 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 19 .4 - 49 -...
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Page 50: Condensate Trap
CONDENSATE TRAP 20 CONDENSATE TRAP 20 .3 Removal Warning: isolate the boiler from the mains electrici- 20 .1 Function ty supply before removing any covering or compo- nent . The condensate trap "1" in Figure 20.1 and Figure 20.2 allows the discharge of the condensate via the condensate drain pipe 1 Remove the front and right case panels. -
Page 51: Short Spare Parts List
SHORT SPARE PARTS LIST 21 SHORT SPARE PARTS LIST G .C . part no . Description Q .ty Manufacturer part no . Burner (mod. M300V.2025 SM) BI1713 100 Burner (mod. M300V.2530 SM - M300V.3035 SM) BI1713 101 Expansion vessel BI2262 108 Condensing heat exchanger (mod. - Page 52 SHORT SPARE PARTS LIST Figure 21 .1 - 52 -...
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- Page 56 *1796239500* 17962.3950.0 4024 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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