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User manual and Installation instructions

1. D Values subject to tolerance Values refer tests with a 1 m flue working at the nominal heat input 26 TECHNICAL INFORMATION 4 4 Technical data mod M296 28SM C Heat input Domestic hot water kw 29 0 temperature settings Nominal net W ch dhw BTU h 98952 kW 32 2 Maximum pressure Nominal gross ch dhw 109837 8 7 Minimum pressure Minimun net ch dhw 29686 Flow rate minimun 9 7 Flow rate 30 rise 0 Minimun gross ch dhw 32951 Useful output Maximun ch dhw Flow rate 35 rise Flow rate 40 rise Gas supply pressures Minimun ch dhw condensing ch dhw 104411 9 1 Minimun condensing ch dhw Central heating Min Max flow temperature settings Minimum return temperature Maximum pressure Minimum pressure Available head in 1000 l h Seasonal effiency G20 Seasonal effiency G30 G31 to the minimum useful output z o lt m z 1 mbar approximately equals 10 mm H O 2T TECHNICAL INFORMATION Max gas pressures at the burner fpem Power consumption Protection degree External fuse rating Internal fuse rating C12 C32 C42 C52 C82 Co
2. 55 5 10 WAE PET Permis nua epe eques quie quare 35 9 13 Water inhibitor concentration 55 5 11 Electrical supply 35 GAS BOILER COMMISSIONING CHEC 6 1 5 37 KEIST i uiid Rees 58 6 1 Warnings esa DIM 37 SERVICE INTERVAL RECORD 59 6 2 Precautions for installation 37 Abbreviations used in the manual C h Central heating D h w Domestic hot water D c w Domestic cold wate Appliance category 12 3 Gas G20 20 mbar G30 29 mbar G31 37 mbar Country of destination United Kingdom GB Ireland IE This appliance conforms with the following EEC directive Gas Directive 2009 142 CE Boiler Efficiency Directive 92 42 CEE Electromagnetic Compatibility Directive 2004 108 CE Low Voltage Directive 2006 95 CE The manufacturer in the continuous process to improve his products reserves the right to modify the data expressed in the present documentation at any time and without prior notice The present documentation is an informative support and it can not be considered as a contract to wards third parties APPLIANCE DESCRIPTION 1 APPLIANCE DESCRIPTION 8 Function selector and c h temp control knob 1 4 Overview 9 D h w temperature control knob The model and serial number of the boiler 10 Appliance operation lights are printed on bottom right side 1 3 Isolation valves
3. lt z X WARNING 4 Because every boiler is fired and tested live at the factory a small amount of water re mains within the boiler It is possible for this water to initially cause the pump to seize It is therefore recommended that the pump rotor be manually turned to free its rotation before turning the boiler on 4 Remember to release the auto air purge before filling the boiler See the instructions to identify the location of this device 4 This boiler allows to control the flow temperature of the central heating system at very low levels In case of underfloor heating system a temperature limiting device e g a safety thermostat is recommended to stop the boiler in case that the water temperature exceeds the design temperature You are strongly advised to to the British Standard BS 7593 2006 Code of practice flush out the system both cold and hot in order to remove system and installation debris Itis also sensible to initially fire and commission the boiler before connecting any external controls such as a room thermostat By following this procedure if you have a subsequent problem this method if you have a subsequent problem following the addition of an exter nal control you can eliminate the boiler from your fault analysis Ifthe boiler is fitted with a digital programmer when setting the times for automatic opera tion remember that for every ON time there must be an OFF time to follo
4. Switch off the boiler turn off the hot water tap s and disconnect the pressure gauge Reassemble the sealed chamber lid and the front panel of the case see Disman tling the external panels to page 53 If the maximum and minimum gas pres sures measuredabove are not in accord ancewith the technical data sections Technical Data section pag 24 or pag 27 then adjustment will be necessary A full explanation of the gas pressure ad justment procedure is given in the Gas Valve section of the service manual If maximum and or minimum gas pres sures are adjusted then the ignition gas pressure must be checked and adjusted if necessary Important after the gas pressure checks and any adjustment operations all of the test points and adjustment devices must be sealed Replace the adjustment pro tection cap 7 9 Checking the burner ignition Turn the boiler OFF Open the gas valve outlet pressure test point 33 Fig 7 6 and connect the gauge Turn the boiler ON positioning the control selectors 8 in the positions as shown in as in Fig 7 7 and ensure that the timer selec tor switch and room thermostat if fitted are set to heat demand Fig 7 7 48 COMMISSIONING Watch the gauge and check to see if the ignition pressure registered corresponds to the values as given in the Technical Data Turn off the boiler and reignite it by turning the function selector 8 to the
5. The safety relief valve and the condensate drain must be connected to a suitable drain or discharge in a safe manner The electrical wiring must conform with cur rent Regulations in particular the boiler must be earthed using the cor rect bonding clamp adjacent to the boiler a fused spur isola tion switch must be installed which permits a complete switching off in the conditions of the overvoltage category Ill Refer to section Electrical connections to page 42 in this chapter for the electrical con nections In no circumstances will the manufac turer be held responsible if the warnings and instructions contained in this manu al have not been complied with 6 2 Precautions for installation The following prescriptions QD must be respected for installa tion The boiler must be fixed to a strong wall The dimensions for the exhaust fume duct detailed in section Choice of flue to page 40 and the correct procedures for installing the duct depicted in the instruc tion leaflet included with the flue kit must be complied with during installation To allow maintenance procedures it is necessary to leave the minimum gaps in dicated in Fig 6 1 250 25 25 200 All measures are in mm Fig 6 1 When installing the boiler in a cupboard cover or alcove allow at least 50 mm per manent clearance from the front face of the boiler Also ensure sufficient clearance to allow free acces
6. After 3 4 minutes has elapsed the boiler will then re ignite and operate perfectly normal ly The ignition delay cycle does not prevent normal operation of the boiler to provide d h w If external controls are fitted e g Timeclock room thermostat ensure they call for heat Turn on the electricity supply to the boil er switching on the fused spur isolation switch The appliance operation light 10 will flash every 4 seconds Turn the function selector 8 as in Fig 7 5 The appliance operation light 10 will flash every 2 seconds The boiler will now go through an ignition sequence and the burner will light If during the ignition attempt period the boiler fails to light the full sequence control p c b will go to lockout and the lock out sig nal lamp 6 will appear To reset the boiler press and release the boiler reset button 7 7 8 Checking the gas pressure at the burner This boiler has been factory tested to the highest quality control standards The maximum and minimum gas pres sures are already set during this quality control process however the checking procedure must be followed to ensure maximum operating efficiency from the boiler Remove the front panel of the case see section Dismantling the external panels to page 53 and the sealed chamber lid Loosen the internal screw 33 Fig 7 6 on the Outlet Pressure Test Point of the Gas Valve and connect a pressure gauge us ing a sui
7. Reference should be made to the current ETCI rules for electrical installations For Ireland IE refer to 1 5 813 2002 The boiler is supplied for connection to a 230 V 50 Hz supply The supply must be fused at 3A The method of connection to the electricity supply must facilitate complete electrical isolation of the appliance by the use of a fused spur isolation switch Its installation permits a complete switching off in the con ditions of the overvoltage category Ill Alter natively it can be used a 3A fused three pin plug and unswitched shuttered socket outlet both complying with BS 1363 The point of connection to the electricity supply must be readily accessible and adja cent to the appliance except where the ap pliance is installed in a bathroom this must then be sited outside the bathroom 2 lt x m a N 96 INSTALLATION 6 INSTALLATION 6 1 Warnings The use of gas appliances is o subject to statutory control it is essential to observe the current regulations and laws in force see also chapter 5 The appliance must discharge combustion products directly outside or into a suitable ex haust duct designed for this pur pose Combustion products must be discharged using origi nal flue kits only since they are integral parts of the boiler For LPG the appliance must also conform with the requirements of the distributors and comply with current Regulations and laws in force
8. the current Building Regulations and reference should be made to the current ETCI rules for electrical installations 5 2 Location of appliance The appliance may be installed in any room or internal space although particular atten tion is drawn to the requirementsof the cur rent I E E Wiring Regulations and in Scot land the electrical provisions of the Building Regulations applicable in Scotland with respect to the installation of the combined appliance in a room containing a bath or shower For Ireland IE reference should be made to the current edition of 1 5 813 2002 and the current ETCI rules for electrical instal lations Where a room sealed appliance is in stalled in a room containing a bath or shower any electrical switch or appli ance control utilising mains electricity should be so situated that it cannot be touched by a person using the bath or shower The location must permit the provision of an adequate flue and termination For unusual locations special procedures may be necessary and BS 67968 gives de tailed guidance on this aspect A compartment used to enclose the appli ance must be designed specifically for this purpose This appliance is not suitable for external installation 5 3 Flue system The provision for satisfactory flue termina tion must be made as described in BS 5440 part 1 For Ireland IE referto 1 S 813 2002 The appliance must be installed so that the flue terminal is expo
9. Fig 6 14 and pull the control panel When completely pulled out the panel can rotate 45 downwards to facilitate the operations on the internal parts Fig 6 14 Loosen the screws M and remove the ser vice panel Fig 6 15 For the electrical connection to the boiler use electric wire swhich conform to the cur rent regulations with flexible cord each core having a cross section area not less than 0 75 mm Connect the electrical supply flexible cord coming from the fused spur isolation Switch to the power supply terminal block of the boiler Fig 6 16 keeping the same connections for the live brown wire and the neutral blue wire External 3 A fuse or fused plug with same current rating is rec ommended Do not connect live wires to terminals to which the room thermostat must be connected Connect the earth wire yellow green Connection of a room thermostat The room thermostat must be connected to the terminal block situated next to the con trol panel When connecting any type of external control the link N in Fig 6 16 must be removed 43 m z z m E INSTALLATION To the fused spur isolation L switch A N NS PN S 3 2 1 O ABO KL KL N Power supply terminal block lel External controls terminal block Fig 6 16 Connect the room thermostat between ter minals 1
10. Fig 8 7 To reset the boiler to the normal operation turn it ON by the function selector 8 on the desired operation and checking the igni tion pressure and that the burner lights up uniformly In any case the boiler automati cally resets to its normal operation after 10 minutes Factory setting Natural gas as illustrated 14 Open position Fig 8 7 Calibrate the gas valve according to the instructions given in the service manual section Modulating gas valve Adjustment Re assemble the lid of the sealed cham ber Replace the self adhesive label indicating the type of gas and the gas pressures to which the appliance has been set with the label included with the conversion kit The label is placed on the botton of the appli ance Replace the adjustment protection cap Replace the front panels of the case 52 MAINTENANCE 9 MAINTENANCE 9 1 Warnings The procedures detailed in this chapter must be carried out only by a Gas Safety Registered Engineer Thus you are advised to contact an Author ised Service Agent For Ireland IE the servicing work must be carried out by a competent Person For efficient and continuous operation of the boiler you are advised to have at least once a year maintenance and cleaning done by an Approved Service Engineer Isolate the appliance from the electricity supply by turning off the fused spur isola tion switch adjacent to the appliance and tur
11. OFF position and then back to that indicated in Fig 7 7 Repeat this process two to three times leaving 30 second intervals between each ignition Check the ignition pressures and visually check that the burner lights uni formly and in a controlled manner If the burner ignition is not uniformly con trolled then checks should be made to the flue installation and termination that the flue gasket as shown in Fig 6 5 on page 39 is in place that the burner and injectors are clean that the boiler is set for the correct gas used see GAS CONVERSION to page 51 If the ignition pressure recorded is not as indicated in the Technical Data then refer to section Ignition gas pressure adjust ment of the Service Manual for the nec essary adjustment procedures Important after the gas pressure checks and any adjustment operations all of the test points must be sealed and replace the adjustment protection cap 7 10 Checking the ignition device With the burner on high flame close the gas cock After three ignition attempts within about three minutes the lock out signal lamp 6on page 8 must appear To reset the boiler press and release the boiler reset button 7on page 8 7 11 Checking the flue system The flue system should be visually checked for soundness Check all clamps gaskets and fixing are secure and tight Ensure that the flue terminal is sited cor rectly in accordance with the flue fitting in structions
12. and 3 as shown in Fig 6 17 Do not connect live wires to ter A minals to which the room ther mostat must be connected Room thermostat N External controls terminal block Power supply terminal block Qo pao gir 1 Fig 6 17 Route the electrical supply flexible cord and the external control flexible cord as illustrated in Fig 6 18 Lock the flexible cords in placewith the flexible cord clamps To the external To the fused control device spur isolation JA CHO eer im Fig 6 18 6 10 External frost protection Connect the frost thermostat between terminals 1 and 2 as shown in Fig 6 19 Do not connect live wires to terminals to which the room thermostat must be connected Frost thermostat Room thermostat 1 3 m S B Q Power supply terminal block 1 External controls terminal block t Fig 6 19 44 COMMISSIONING 7 COMMISSIONING 7 1 Warnings The commissioning of this boiler and system must only be undertaken by a professionally qualified person in ac cordance
13. be pro vided 30 GENERAL REQUIREMENTS 5 GENERAL REQUIREMENTS Our Company supports the Benchmark initiative The Benchmark Log Book is located at the back of this manual and should be completed by the Installing Commissioning Engineer and handed over to the User for future reference by other visiting Engineers Also included is the Service Interval Record card that should be completed by the Service Engineer following the annual service maintenance of the boiler and system For Ireland IE it is necessary to com plete a Declaration of Conformity to indicate compliance to 1 5 813 2002 This appliance must be installed by a competent person in accordance with the Gas Safety installation amp Use Regu lations 5 1 Related documents The installation of this appliance must be in accordance with the relevant requirements of the current Gas Safe Installation amp Use Regulations the Local Building Regula tions the current E E Wiring Regulations the Regulations and by laws of the local wa ter undertaking and in Scotland in accord ance with the Building Standards Scotland Regulation Health and safety document n 635 Electricity at work regs It should also be in accordance with the Brit ish Standard Codes of Practice In Ireland IE The installation must be carried out by a Competent Person and in stalled in accordance with the current edi tion of S 813 2002 Domestic Gas Installa tions
14. damage to materials of the appliance or other objects ATTENTION The indications marked with this symbol is important informa tion that must be carefully read Remember that The manual must be read thoroughly so that you will be able to use the boiler a safe and sensible way must be carefully kept It may be necessary for reference in the future o lt z lt 4 The lighting up must be carried out by competent and responsible engineer 4 The manufacturer disclaim all liability for any translations of the present manual from which incorrect inter pretation may occur cannot be held responsible for non observance of instructions contained in this manual or for the consequences of any procedure not specifically described Using the boiler 4 Before lighting the boiler you are advised to have a Gas Safety Registered Engineer check that the installation of the gas supply is gas tight is of the correct gauge for the flow to the boiler is fitted with all the safety and control devices required by the current Regulations 4 Ensure that check with the Installer that he has connected and terminated the pressure relief valve in a manner which allows safe discharge The manufacturers are not responsible for damage caused by opening of the pressure relief valve and consequent escape of wa ter if this is not connected and terminated the installer has connected the condensate outlet to a su
15. including the current time Fig 2 18 2 8 Built in time switch B The combiboilers are equippedwith a built in electronic time switch which controls the c h operation B G o a YA F D E C B 215 INSTRUCTIONS FOR USE Display and control panel Mode selector switch Reset button OK button Increase setting button Decrease setting button On off button Time display ON OFF display cTrommoousmr Setting the current time Press repeatedly the button A until the dis play shows the symbol Press the buttons D or E until the current time appears in the display G The clock starts by pressing the button A to show the symbol AUTO Setting example shown in Fig 2 20 Current time 16 30 day Thursday E 9 33 5 oJ Fig 2 20 Setting the switching time 28 memory locations are available corre sponding to 14 on off sequences Press repeatedly the button A until the dis play shows the symbol C1 The symbols shown in Fig 2 21 appears in the display A m JA Fig 2 21 Press the buttons D or E to set the desired ON time Press the button to confirm the setting and to continue programming the OFF time 16 Set the OFF time as explained above for the ON setting and confirmby pressing the OK button C Proceed in the same way for other settings Setting example shown in Fig 2 22
16. o m a E no INSTALLATION For the elbow of 45 loss 0 5 m For the elbow of 90 loss 1m Fig 6 10 Pluming kit Fi 6 11 Fi Co axial 60 100 mm vertical part 60 mm flue outlet This kit allows the combustion air to be sucked up and expel the burnt gases directly to the outside through a telescopic co axial 6 11 flue 450 950 mm Type C52 90 0 85 m 95 60 mm Ly 60 100 mm Fig 6 11 In the last section the fumes are expelled 42 through a vertical section Extensions and elbows can be added to ex tend the kit s length The chart of Fig 6 12 gives the allowable dimensions of the ducts and b of Fig 6 11 a vertical length m 24 2 2 2 0 1 8 1 6 1 4 1 2 1 0 0 8 0 6 0 4 0 2 0 0 04 06 08 10 12 14 16 18 b horizontal length m Fig 6 12 Each additional elbow reduces the overall acceptable length of the flue system as fol lows 45 60 100 mm reduce length by 0 5 m 90 60 100 mm reduce length by 1 m 45 60 mm reduce length by 0 65 m 90 60 mm reduce length by 0 85 m 6 9 Electrical connections Remove the front panel of the case see the section 9 2 in this manual Remove the screws K Fig 6 13 Loosen the screws L INSTALLATION Fig 6 13 Remove the side panels or move the low er part of the side panels as indicated in
17. service manual 2 7 Built in time switch A The boilers are equipped with a built in elec tronic time switch 5 Fig 1 3 on page 8 which controls the c h operation Fig 2 12 Display and control panel A Mode selector switch B Reset button C Enter button 243 INSTRUCTIONS FOR USE Increase setting button Decrease setting button On off button Time display ON OFF display Setting the current time Note with a new unit or when the reset but ton B has been pressed and the selector Switch A is to the position the time display G is flashing Set the mode selector switch A to the posi tion and press the buttons D or E until the current time appears in the display G The clock starts by moving the switch A to the AUTO position Setting example shown in Fig 2 13 Current time 16 30 i A AUTO TIMER Setting the switching time 20 memory locations are available corre sponding to 10 on off sequences Set the mode selector switch A to the C1 po sition The symbols shown in Fig 2 14 appears in the display TIMER Press the buttons D or E to set the desired ON time Press the enter button C to con firm the setting and to continue programming the OFF time Set the OFF time as explained above for the 14 Fig 2 13 LA Fig 2 14 ON setting and confirmby pressing the en ter button C Proceed in the same way for other settings Setting exa
18. 3 Turn on the electricity supply to the boil er switching on the fused spur isolation switch The appliance operation light 10 Fig 2 4 will flash every 4 seconds stand by condition If the boiler is to be used for c h and d h w position the function selector 8 as in Fig 2 4 The appliance operation light 10 will flash every 2 seconds operating boiler 10 Fig 2 4 f d h w supply only is required position the function selector 8 as in Fig 2 5 The appliance operation light 10 will flash every 2 seconds operating boiler 10 Fig 2 5 2 4 circuit temperature The output temperature of c h water is ad justable from a minimum of about 40 C to a maximum of about 85 C Fig 2 6 by turning the function selector 8 Adjustment of c h output on the boiler is au tomatic The greatest output pre set in the factory can however be reduced in level according to actual system requirements this does not affect the maximum output in d h w opera tion Such adjustments must be carried out by a qualified person therefore we advise you to contact your installer or Service Agent Adjustment of the boiler temperature alters 211 INSTRUCTIONS FOR USE the gas flowat the burner according to the thermaldemand in the system So it is usual tosee theburner lit at the minimum level for more or less long periods Minimum Maximum Fig 2 6 Adjus
19. 3 2 has stopped the boiler To re start the boiler it is necessary to press the boiler reset button 7 Fig 3 2 Fig 3 2 For the first lighting up and following main tenance procedures for the gas supply it may be necessary to repeat the resetting operation several times so as to remove the air present in the pipe work After five consecutive resetting attempts the reset button is inhibited To restore its func tion it is necessary to switch the boiler off and on from the electrical mains using the fused spur isolation switch fitted adjacent to the appliance Safety lock out may occur even in case of a blockage of the condensate drainage e g plugged drain pipe It is advisable to check the condensate drainage pipe and traps for cleanness In this case and in case of per sistent lock out call compe tent and responsible Service Engineer If noises due to air bubbles are heard during operation you should check that the pressure on the temperature and pressure gauge Fig 2 2 on page 10 is not below the correct setting If required top up the system correctly as described in the section Refilling proce dure to page 10 Bleed any air present in the radiators if nec essary If the pressure on the temperature and pressure gauge has gone down It is necessary to top up the appliance with water again so as to raise the pressure to an adequate level as described in the sec tion Refil
20. 5 Operation 9 lt 2 INSTRUCTIONS FOR USE 10 6 9 Electrical connections 42 Warnings ec seeee le 10 6 10 External frost protection 44 22 Refilling 10 7 SOMMISSIONING ee rr rrr tn 48 2 3 lomlan GAN NR NG ANG E NA 11 arningS ew eee 2 4 En circuit temperature 11 7 2 Electrical 45 2 5 D h w temperature 12 7 3 Gas supply installation 45 2 6 Extinguishing serrera piromane innii ieai 13 7 4 Filling the d h w system suus 45 2 7 Built in time 5 13 7 5 Initial filling of the system 45 2 8 Builtin time switch 15 ue eae a pe and traps ighting the 3 JSEFUL ADVICE XC CERRO 18 7 8 Checking the gas pressure at the burner 4T 32 B t ede Md 18 7 9 Checking the burner ignition 48 33 Cord pro ws d EARRAN EE EAA D E AR 18 7 10 Checking the ignition device 49 34 Ben FREE AURI MER NR 18 7 11 Checking the flue system 49 35 obe A Mon ONANGO s usar sung geni nen a 18 7 12 Checking the condensate drain pipe 49 ARS TAN CHANING ess eor 7 13 Instructing
21. ATER SYSTEM COMPLIES WITH PARTS 4 amp 7 OF THE BUILDING REGULATIONS THE APPLIANCE AND ASSOCIATED EQUIPMENT HAS BEEN INSTALLED AND COMMISSIONED IN ACCORDANCE WITH THE MANUFACTURER S INSTRUCTIONS IF REQUIRED BY THE MANUFACTURER HAVE YOU RECORDED A CO CO RATIO READING N A YES CO COz RATIO THE OPERATION OF THE APPLIANCE AND SYSTEM CONTROLS HAVE BEEN DEMONSTRATED TO THE CUSTOMER THE MANUFACTURER S LITERATURE HAS BEEN LEFT WITH THE CUSTOMER COMMISSIONING ENG S NAME PRINT Gas Safe Register ID No SIGN DATE SERVICE INTERVAL RECORD It is recommended that your heating system is serviced regularly and that you complete the appropriate Service Interval Record Below Service Provider Before completing the appropriate Service Interval Record below please ensure you have carried out the service as described in the boiler manufacturer s instructions Always use the manufacturer s specified spare part when replacing all controls SERVICE 1 pate SERVICE 2 pate ENGINEER NAME ENGINEER NAME COMPANY NAME COMPANY NAME TEL No TEL No Gas Safe Register ID CARD SERIAL No Gas Safe Register ID CARD SERIAL No COMMENTS COMMENTS SIGNATURE SIGNATURE SERVICE 3 pate SERVICE 4 pate ENGINEER NAME ENGINEER NAME COMPANY NAME COMPANY NAME TEL No TEL
22. CAL INFORMATION Max gas pressures at the burner Power consumption Protection degree External fuse rating Internal fuse rating C12 C32 C42 C52 C82 Coaxial 60 100 Twin split pipes 80 80 Roof 80 125 Nominal heat flow rate 25 0 z lt m l Exhaust temperature 60 Mass flow rate 0 0128 Flue gas figures Nominal heat input CO2 content with gas G20 O2 content with gas G20 content with gas G20 Exhaust temperature 25 TECHNICAL INFORMATION CO2 contents ch dhw Nominal heat input CO2 content with gas G20 CO2 content with gas G 30 G31 Minimum heat input CO2 content with gas G20 CO2 content with gas G30 G31 Other specifications eight dry 42 5 ater volume in the boiler up to 1 bar kg 1 4 referred to the net calorific value at 15 C and 1013 25 mbar G20 34 02 MJ m G31 46 34 MJ kg referred to the gross calorific value at 15 C and 1013 25 mbar G20 37 78 MJ m G31 50 37 MJ kg The value is used the UK Government s Standard Assessment Procedure SAP for energy rating of dwellings The test data from which it has been calcula ted have been certified by a notified body z lt m a
23. ER COMBI BOILER HEATING ZONE VALVES FITTED NOT REQUIRED HOT WATER ZONE VALVES FITTED NOT REQUIRED THERMOSTATIC RADIATOR VALVES FITTED AUTOMATIC BYPASS TO SYSTEM FITTED NOT REQUIRED FOR ALL BOILERS CONFIRM THE FOLLOWING THE SYSTEM HAS BEEN FLUSHED IN ACCORDANCE WITH THE BOILER MANUFACTURER S INSTRUCTIONS THE INHIBITOR USED THE SYSTEM CLEANER USED FOR THE CENTRAL HEATING MODE MEASURE amp RECORD GAS RATE m3 hr ft hr BURNER OPERATING PRESSURE IF APPLICABLE N A mbar CENTRAL HEATING FLOW TEMPERATURE C CENTRAL HEATING RETURN TEMPERATURE C FOR COMBINATION BOILERS ONLY HAS A WATER SCALE REDUCER BEEN FITTED YES NO WHAT TYPE OF SCALE REDUCER HAS BEEN FITTED FOR THE DOMESTIC HOT WATER MODE MEASURE amp RECORD GAS RATE 3 ft hr MAXIMUM BURNER OPERATING PRESSURE IF APPLICABLE N A mbar COLD WATER INLET TEMPERATURE C HOT WATER OUTLET TEMPERATURE C WATER FLOW RATE Its min FOR CONDENSING BOILERS ONLY CONFIRM THE FOLLOWING THE CONDENSATE DRAIN HAS BEEN INSTALLED IN ACCORDANCE WITH THE MANUFACTURER S INSTRUCTIONS YES FOR ALL INSTALLATIONS CONFIRM THE FOLLOWING THE HEATING AND HOT W
24. K ON time 7 45 L OFF time 10 30 TLE ON lo lal K Fig 2 22 LL I2 o Activating the timed settings The current time appears in the display The ON OFF display H indicates the current state of operation according to the settings WW 00 30 5 Fig 2 23 Note when the display shows the symbol AUTO and the boiler is switched off at the fused spur isolation switch the display H in dicates only the OFF state The other indica tions are blanked Reading the timed settings Press repeatedly the button A until the dis play shows the symbol C1 Fig 2 21 The symbols shown in Fig 2 21 appears in the display Press the OK button C Each time the but ton is pressed the display shows the details of the next setting Changing or deleting the timed settings Press repeatedly the button A until the dis play shows the symbol C1 Fig 2 21 The symbols shown in Fig 2 21 appears in INSTRUCTIONS FOR USE the display Press the OK button C until the display shows the setting to be modified or deleted The time setting can be modified now by pressing button D or E and the operation can be switched on or off by pressing the button To delete a time set press the button D or E until the symbols shown in Fig 2 21 appears in the time display G The new settings are memorised by pressing the button A Manual operation The operation of the time switch can be
25. No Gas Safe Register ID CARD SERIAL No Gas Safe Register ID CARD SERIAL No COMMENTS COMMENTS SIGNATURE SIGNATURE SERVICE 5 pate SERVICE 6 pae ENGINEER NAME ENGINEER NAME COMPANY NAME COMPANY NAME TEL No TEL No Gas Safe Register ID CARD SERIAL No Gas Safe Register ID CARD SERIAL No COMMENTS COMMENTS SIGNATURE SIGNATURE SERVICE 7 pate SERVICE 8 pare ENGINEER NAME ENGINEER NAME COMPANY NAME COMPANY NAME TEL No TEL No Gas Safe Register ID CARD SERIAL No Gas Safe Register ID CARD SERIAL No COMMENTS COMMENTS SIGNATURE SIGNATURE SERVICE 9 pare SERVICE 10 pate ENGINEER NAME ENGINEER NAME COMPANY NAME COMPANY NAME TEL No TEL No Gas Safe Register ID CARD SERIAL No Gas Safe Register ID CARD SERIAL No COMMENTS COMMENTS SIGNATURE SIGNATURE 17962 1548 4 1111 60A5 UK Biasi UK Ltd Commercial Road Leamore Enterprise Park WALSALL WS2 7NQ Tel 01922 714 600 www biasi co uk
26. Provide for the installation of a stop valve on the D c w inlet pipe Fig 1 1 1 Case front panel 2 Control panel 3 Control panel cover Fig 1 2 11 Condensate drain pipe 1 2 Control panel 12 C h return valve 4 C h circuit temperature and pressure 13 D c w inlet valve gauge 14 Gas inlet valve 5 Time switch c h control 15 D h w outlet pipe 6 Lock out signal lamp 16 C h flow valve 7 Lockout reset button ye 1 C amp T 000p f M 10 9 8 76 Fig 1 3 zB APPLIANCE DESCRIPTION 1 4 Technical data For detailed technical data see sections Technical Data on pag 24 or pag 27 1 5 Operation lights Three lights 10 in Fig 1 3 give detailed in dication regarding the operation of the boiler The following table gives the relationship between each of the possible light combina tions and their meaning A short pulse every 4 sec SM onds stand by condition O O position Anti freeze system active 1 second pulse every 2 seconds normally op erating boiler Function selector in ue or po sition 1 1 202 O Ch operation ZAN S m D h w operation M ur S fo SAZA Frost protect operation v D h w operation Q 202 Excessive temperature on primary circuit If the lights combination observed is not i
27. Wall hung fanflue roomsealed high efficiency gas boiler User manual and Installation instructions Riva Plus HE Models G C Appl No M296 24SM C COMBI BOILER M296 28SM C COMBI BOILER soie recommended ABIASI WARNING Congratulations on your choice Riva Plus HE are condensing high efficiency sealed chamber fan flue gas boilers They are fully electronically controlled and have electronic ignition The materials they are made of and the control systems they are equipped with give you safety a high level of comfort and energy savings to allow you to get the greatest benefit out of independent heating Riva Plus HE allow a higher efficiency by reducing the flue gas temperature such that the water vapour formed during the combustion is condensed out This allows a gain of useful heat that otherwise would be lost o OP e PE DANGER The indications marked with this symbol must be observed to pre vent accidents of mechanical or generic origin e g injuries or bruises DANGER The indications marked with this symbol must be observed to pre vent accidents of electric origin electrocution DANGER The indications marked with this symbol must be observed to pre vent the risk of fire or explosion DANGER The indications marked with this symbol must be observed to pre vent accidents of heat origin burns ATTENTION The indications marked with this symbol must be observed to prevent malfunctioning and or
28. able to call an approved Service Engineer 9 10 Drain pipe inspection Check the soundness and integrity of the condensate drain pipe Verify the cleaness and correct filling of the condensate traps 9 11 Visual inspection of appliance Visually inspect all water joints seals and connections for any evidence of leakage and retighten grease or replace them as necessary MAINTENANCE 9 12 Gas pressures and tightness Check appliance for gas tightness Recheck operational pressures and adjust as neces sary as described in section Checking the gas pressure at the burner to page 47 9 13 Water inhibitor concentration Where chemical products are used the level of water treatment should be checked on an annual basis and re treated after full or par tial drain down Lu 2 2 lt 55 NOTES 56 NOTES 57 benchma COLLECTIVE MARK BOILER SERIAL No BENCHMARK No NOTIFICATION No GAS BOILER COMMISSIONING CHECKLIST CONTROLS ro comply with the Building Regulations each section must have a tick in one or other of the boxes TIME amp TEMPERATURE CONTROL TO HEATING ROOM T STAT amp PROGRAMMER TIMER PROGRAMMABLE ROOMSTAT TIME amp TEMPERATURE CONTROL TO HOT WATER CYLINDER T STAT amp PROGRAMMER TIM
29. and Fig 5 1 on page 32 of this manual To carry out a combustion check refer to the instructions given in the section Combus tion analysis check to page 54 Reference figures are given in the Techni cal Data section page 24 of this manual Flue gas figures 7 12 Checking the condensate drain pipe Check the soundness and integrity of the condensate drain pipe Verify the cleanness and correct filling of the condensate traps 7 13 Instructing the user Hand over this combined User amp Installation manual and the Service manual to the end user and explain how to use the unit in both c h and d h w modes Take the User step by step through the light ing instructions Show the User how to switch off the appli ance quickly and indicate the position of the electric supply isolator Explain the proper use and adjustment of all system controls this will ensure the great est possible fuel economy Explain the function and use of the function selector Explain and demonstrate the function of 49 z o lt x m l E COMMISSIONING time and temperature controls if fitted Explain how to turn off the appliance for both short and long periods and advise on the precautions necessary to prevent dam age should the appliance be inoperative when freezing conditions may occur Fill in the details required on the Boiler Guarantee Certificate and hand to the User advising them to return the co
30. anual operation The operation of the time switch can be forced on or off constantly or for a timed pe riod To force constantly on or off the timer op eration set the mode selector switch A to the TIMER position The symbols shown in Fig 2 17 appears on the display Fig 2 17 The operation can be switched permanently on or off by pressing the button F and leaving the switch A in the TIMER position To force a timed delay on or off operation set the mode selector switch A in the TIMER position Set the time delay by pressing the button D or E and the operation can be forced on or off by pressing the button F The time delay can be set within the follow ing ranges 1 to 23 hours with steps of 1 hour 1 to 27 days with steps of 1 day The time delay setting is activated by moving the switch A to the AUTO position The ON OFF display H flashes indicating that the current state of operation has been forced To delete the timed delay setting set themode selector switch A in the TIMER po sition press the button D or E until the sym bols shown in Fig 2 17 appears in the dis play and then set the mode selector switch A to the AUTO position Setting example shown in Fig 2 18 forced ON state for 4 hours Lt L ON Ji Resetting To completely reset the timer press the reset button with a pointed object pencil CAUTION pushing the reset button will completely erase the settings as well as all the data
31. as reached the boiler operating tempera ture The system must then be immedi ately flushed through This procedure must be repeated twice more During this operation we highly recom mend the use of a c h flushing deter gent in the quantities as specified by the appropriatemanufacturer whose func tion it is to dissolve any foreign matter whichmay be in the system The above operation could save the invalidation of your boilers guarantee andwill alsoprevent problems which you may experience in the future if an inhibi tory is not used 7 6 Condensate pipe and traps The full length of the condensate pipe should be check for leaks The boiler has a built in condensate trap provided with a ball valve that prevents the escape of combustion products when the trap is empty It is however recommended that any oth er trap in the drain system is correctly filled with water before to run the boiler e Fill the built in condensate trap by removing the flue elbow and pouring a cupful of water into the flue outlet Fig 7 3 Fig 7 3 An alternative to the removal of the flue el bow pour the water through the flue sam pling point Fig 7 4 46 COMMISSIONING Sampling points Flue exhaust Fig 7 4 7 7 Lighting the boiler Some products incorporate an anti cycling time delay It is normal when first switch ing the boiler on for the boiler to operate on heating for a few seconds then switch off
32. axial 60 100 Twin split pipes 80 80 Roof 80 125 Nominal heat flow rate E 29 0 z lt m l N Exhaust temperature 60 Mass flow rate 0 0147 Flue gas figures Nominal heat input CO2 content with gas G20 O2 content with gas G20 content with gas G20 Exhaust temperature 28 TECHNICAL INFORMATION CO2 contents ch dhw Nominal heat input CO2 content with gas G20 CO2 content with gas G 30 G31 Minimum heat input CO2 content with gas G20 CO2 content with gas G30 G31 Other specifications eight dry ater volume in the boiler up to 1 bar kg 1 5 referred to the net calorific value at 15 C and 1013 25 mbar G20 34 02 MJ m G31 46 34 MJ kg referred to the gross calorific value at 15 C and 1013 25 mbar G20 37 78 MJ m G31 50 37 MJ kg The value is used in the UK Government s Standard Assessment Procedure SAP for energy rating of dwellings The test data from which it has been calcula ted have been certified by a notified body z lt x m D Values subject to tolerance Values refer tests with a 1 m flue working at the nominal heat input 29 z m a N TECHNICAL INFORMATION 45 Hydraulic specifications The hydraulic specifications in Fi
33. e from the pipe that discharges the exhaust gasses Consequently it is pos sible to extend the flue system to a greater distance than that provided by the standard horizontal co axial flue If either an additional 45 or 90 accessory elbow is used then the maximum permissi ble length of either pipe must be reduced by 0 90 m or 1 65 m respectively Type C42 Type C52 b Type C82 Fig 6 8 N B The air intake and the flue outlet must not terminate on opposite sides of the building Two restrictors with different size are supplied with the twin pipe kit and have to be installed between the boiler and the air intake adapter Fig 6 9 Air intake adapter Restrictor Gasket Fig 6 9 For the correct use of the restrictors with twin pipes refer to the table For M296 24SM C M296 28SM C Equivalent length Restrictor air duct flue duct Between 1 and 15 m 50 mm More than 15 m up to 30 m 55 mm Vertical roof kit Fig 6 10 This kit allows vertical termination of the flue pipe through the roof The kit is 1 2 min length Extension pieces Co axial are also available which allows the flue system to be extended to a total overall maximum permis sible length Optional 45 and 90 elbowscan be used to offset the flue route Each additional elbow reduces the overall acceptable length of the flue system as follows 44 z o lt x m l E z
34. en you do not expect to use the boiler for a long period and the boiler is not to be used for frost protection then follow the in structions given in section Extinguishing to page 13 2 2 Refilling procedure solate the boiler from the electrical supply atthe fused spur Reconnect the filling loop as demonstrated in Fig 2 1 Control valve Double check valve Temporary connection Dt Supply pipe cold water inlet J Control valve C h return pipe Fig 2 1 Open the valves of the filling loop and watch the gauge until it reaches normal fill ing pressure as shown in Fig 2 2 pressure Fig 22 10 INSTRUCTIONS FOR USE Close the valves and remove the filling loop If you experience any difficulty with the operation of the boiler switch off the boil er immediately at the fused spur isolation Switch and contact your Installer or an approved Service Engineer Air introduced into the boiler during this fill ing process will vent through the automatic air purger fitted to the boiler You may also find it necessary to vent air from your radia tor circuit using your radiator key however be aware that excessive venting will cause the pressure in the system to drop Always ensure that the pressure gauge is set at the required pressure 2 3 Ignition Check that the valves located in the lower part of the boiler are open Fig 2 3 E MM Open position Fig 2
35. ernally this part should be kept as short as possible and protected to reduce the risk of freezing Connection of condensate drainage pipe to internal soil and vent stack A Condensate drain Dimensions in mm Fig 5 2 A Boiler B Internal soil and vent stack C Invert D 450mm up to three storeys 33 z o lt x m l E z E GENERAL REQUIREMENTS Connection of condensate drainage pipe downstream of a sink waste trap Condensate drain Dimensions in mm Fig 5 3 A Boiler E Sink F Open end of condensate drainage pipe direct into gully below grating but above water level 5 8 Water circulation c h Detailed recommendations are given in BS 6798 and BS 5449 the following notes are given for general guidance For Ireland IE refer to 1 5 813 2002 Pipework The return temperature must not be lower of 40 Copper tubing to BSEN 1057 is recommended for water pipes Jointing should be either with capillary soldered or with compression fittings Where possible pipes should have a gradi ent to ensure air is carried naturally to air release points and water flows naturally to drain taps The appliance has a built in automatic air release valve it should be ensured as far as possible that the appliance heat exchanger is not a natural collecting point for air Except where providing useful heat p
36. es will be fully exploited Moreover where the amount of limescale present in the water may be particularly great not exceeding the position in Fig 2 9 of the d h w temperature control knob 9 cor responding to about 50 C Fig 2 9 mini mises annoying incidences of scale deposits and clogging 212 INSTRUCTIONS FOR USE Fig 2 9 In these cases however it is advisable to install a small water treatment device or sof tener With such a device you should avoid periodic descaling Consequently the d h w heat exchanger will keep its performance consistent for a longer period of time with resulting gas savings If the demand for d h w is so great as to pre vent reaching a high enough temperature have the appropriate output limiting valve installed by your installer or an Authorised Service Engineer 2 6 Extinguishing To turn the boiler off set the function selector 8 to the position shown in Fig 2 10 The appliance operation light 10 will flash every 4 seconds der omm 4 h 8 MI 10 When you do not expect to use the boiler for a long period Switch off the electricity supply to the boil er by means of the fused spur isolation Switch Shut off the gas supply cock 14 and the valves for the water circuits fitted under the boiler Fig 2 11 Empty the water circuits if necessary as shown in section General access and emptying hydraulic circuits in the
37. et the timer press the reset button with a pointed object pencil CAUTION pushing the reset button will completely erase the settings as well as all the data including the current time 247 USEFUL ADVICE 3 USEFUL ADVICE 3 4 Central Heating For reasonably economical service install a room thermostat Never shut off the radia tor in the area where the room thermostat is installed If a radiator or a convector does not heat up check that no air is present in it and that its valve is open If the ambient temperature is too high do not alter the radiator valves Reduce the central heating temperature in stead by means of the room thermostat and the function selector 8 in Fig 3 1 Fig 3 1 3 2 Frost protection This appliance is provided with a built in anti freeze system that operates the boiler when the temperature is below 5 Therefore when the boiler is not lit and used in cold weather with consequent risk of freezing do not switch off the boiler at the fused spur isolation switch or close the gas inlet cock 3 3 Condensate drain The condensate drain must not be modi fied or blocked Blockage of the condensate drain caused by debris or freezing can cause automatic shutdown of the boiler If freezing is suspected and the pipe run is accessible an attempt may be made to free the obstruction by pouring hot water over the exposed pipe an cleaning any blockage from the end of the p
38. forced on or off constantly or for a timed pe riod To force constantly on or off the timer op eration press repeatedly the button A until the display shows the symbol TIMER The symbols shown in Fig 2 24 appears on the display TIMER M n Cl Fig 2 24 The operation can be switched permanently on or off by pressing the button F and leaving the display shows the symbol TIMER To force a timed delay on or off operation press repeatedly the button A until the dis play shows the symbol TIMER Set the time delay by pressing the button D or E and the operation can be forced on or off by pressing the button F The time delay can be set within the follow ing ranges 1 to 23 hours with steps of 1 hour 1 to 27 days with steps of 1 day Press the button A until the display shows the symbol AUTO The ON OFF display H flashes indicating that the current state of operation has been forced To delete the timed delay setting press re peatedly the button A until the display shows the symbol TIMER press the button D or E until the symbols shown in Fig 2 25 appears in the display and then press the button A un til the display shows the symbol AUTO Setting example shown in Fig 2 25 forced ON state for 4 hours M 1 Fig 2 25 Note If during manual operation power sup ply turns off timer must be set again follow ing previous steps Resetting To completely res
39. g 4 3 rep resent the pressure available head for the central heating system as a function of the flow rate The load loss due to the boiler has already been subtracted kPa bar 60 0 6 50 0 5 40 0 4 30 0 3 20 0 2 10 0 1 0 0 0 0 200 400 600 800 1000 1200 1400 Vh Fig 4 3 Output with thermostat cocks shut off The boiler is equipped with an automatic by pass valve 46on page 23 which protects the condensing primary exchanger In case of excessive reduction or total blockage of water circulation in the cen tral heating system owing to closure of the thermostatic valves or system component cocks the by pass valve ensures a mini mum flow of water through the primary heat exchanger 4 6 Expansion vessel Note this boiler is designed for opera tion only in a sealed central heating sys tem The height difference between the pressure relief valve and the highest point in the sys tem may be 10 m at most For greater differences increase the pre load pressure in the expansion vessel and the system when cold by 0 1 bar for each additional 1 m For 24 Kw and 28 Kw Capacity Pre load pressure Maximum volume of water in the Where conditions are Average maximum temperature of the system is 85 C Initial temperature when filling up the sys tem is 10 C For systems with volumes greater than 941 an additional expansion vessel must
40. he pressure relief valve to the safety dis charge pipework Fitthe condensate drain 11 Fig 6 4 in the air brake connected to the drainage pipe work See also section Condensate drain to page 33 Fig 6 4 6 7 Fitting the flue system Refer to the assembly instructions contained within the chosen flue kit packaging for the correct assembly and installation In general it has to be taken in considera tion that the horizontal sections of the flue pipe must have an horizontal sloping not less than 1 5 deg 25 mm per metre to wards the boiler In the standard horizontal flue kit Fig 6 6A the flue pipe is angled within the air duct therefore the air duct must be horizontally installed Fig 6 5 If one or more extensions have to be used 39 z o lt x m E 2 m E N INSTALLATION they must be adequately supported so that there is no sag in the flue pipe and amini mum fall of 1 5 deg 25 mm per metre over the whole length towards the boiler is en sured Before fitting the flue system ensure that the flue gasket shown in Fig 6 5 given with the boiler is fitted to the boiler 6 8 Choice of flue The following flue kits are available for con necting to the boiler Standard horizontal flue kit Fig 6 6 A Fig 6 6 Co axial 60 100mm nominal length 1m This kit is normally suppliedwith the boil er and can be fitted to allow discharge to t
41. he electrical connectors of the C h temperature probe NTC 23 in Fig 8 3 31 a Keep pressed the reset button 7 for about 10 seconds until the lock out signal lamp 6 blinks Connect the the electrical connectors of the C h temperature probe NTC 23 in Fig 8 3 Press the reset button 7 repeatedly 4 times until the lamps 10 give the indica tion as in Fig 8 4 gas type mode O z lt Z lt x Where Lamp OFF o Lamp ON e O e Fig 8 4 51 MAINTENANCE GAS CONVERSION At this step it is possible to visualize the cur rent setting by keeping the reset button 7 pressed for more than 5 seconds The lamps 10 will flash a number of times correspond ing to the setting of the knob 9 in Fig 8 5 Gas type gt L PG Setting No gt 4 NATURAL 1 GAS IT O 00 00 bA ii Fig 8 5 Gas Position Approx Max supply ofknob9 current through the modulator device Natural 1 125 mA gas LP G 4 165 mA Fig 8 6 To change the setting turn the knob 9 on a position corresponding to the gas used as shown in Fig 8 5 By turning the knob 9 the lock out signal lamp 6 blinks quickly 2 per seconds indicating that the setting has changed and must be memorised To memorize the setting keep pressed the reset button 7 for about 5 seconds until the lamps 10 briefly blinks simultaneously Open the gas cock 14 in
42. he rear or either side of the boiler via the flanged boiler adapter elbow Minimum length required is 0 3 m Maximum equiva lent length of 2 7 metres for M296 24SM C and M296 28SM C can be achieved utilis ing extensions This flue systemcan only be used to discharge horizontally it is not de signed to enable termination in the vertical 40 plane Vertical kit with 90 elbow Fi Co axial 60 100 mm Supplied with a straight flanged adapter a co axial elbow and a co axial pipe with terminal this kit allows for a vertical rise of 0 5mfrom the boiler In all circumstances the flue terminal must discharge horizon tally and the equivalent flue length must not exceed 2 7 metres for M296 24SM C and M296 28SMIC 6 6B Elbows 45 amp 90 Fi Coaxial 60 100 mm Elbowkits enable the standard flue kits to be offset to overcome obstructions or ensure the correct clearances for the flue terminal Each elbow used in addition to the standard flanged elbow reduces the overall accept able length of the flue systemas follows 6 6C 0 5 m 1m For the elbow of 45 loss For the elbow of 90 loss ipe kits 80 mm Fig 6 7 Fig 6 8 Twin Fig 6 7 Various twin split pipes kits and optional accessories elbows are available to assist INSTALLATION in the termination of the flue where the boiler is installed in a location remote to an outside wall These kits allow for separation of the air supply pip
43. ic water The domestic water installation must be in accordance with the relevant recommenda tions of BS 5546 Copper tubing to BS EN 1057 is recommended for water carrying pipework and must be use for pipework car rying potable water For Ireland IE refer to 1 5 813 2002 5 10 Water treatment C h circuit Where a new boiler is fitted to a new sys tem with either plastic or copper pipes it is important the system is fully flushed on completion to ensure flux residues swarfs oils and other installation debris is removed Where a new boiler is fitted to an existing system it is important the debris from the existing system is fully removed in order to ensure the efficiency of the new appliance is maintained Details on flushing procedure are given in the section Initial filling of the system to page 45 of this manual D h w circuit scale protection In areas where the water is hard i e more than 200 ppm total hardness as defined by BS 7593 1993 Table 2 it is recommended that a proprietary scale reducing device is fitted into the boiler cold supply within the requirements of the local water company 5 11 Electrical supply Warning this appliance must be earthed External wiring to the appliance must be carried out by a competent person and be in 35 lt x m z GENERAL REQUIREMENTS accordance with the current E E Regula tions and any local regulations which apply
44. in the same wall 300 O Above the roof pitch with roof slope less than or equal to 30 350 O Above the roof pitch with roof slope more than 30 600 P From wall face 600 Q From above or to side of an opening 300 Wherever practicable to do so the flue should be extended beyond the perim eter of the balcony Consideration should be given to adding protection against condensate to the ad jacent structure Wall terminals with horizontal discharge less than 2 5 m from a car parking space and less than 2 1 m above the ground Wall terminals less than 2 1 m above the ground with horizontal discharge of the flue products across a public footway or a frequently used private access route or a patio hard surface area 5 4 Gas supply The Gas meter is connected to the service pipe by the local gas region or a local gas region contractor If the gas supply for the boiler serves other appliances ensure that an adequate supply is available both to the boiler and the other EPE GENERAL REQUIREMENTS appliance when they are in use at the same time Pipework must be of adequate size Pipes of a smaller size than the boiler inlet con nection should not be used Installation pipes should be fitted in accord ance with BS 6891 and the complete instal lation should be tested for tightness For Ireland IE refer to 1 5 813 2002 5 5 Airsupply The room in which the boiler is installed does not require a purpo
45. ins water supply even through a non re turn valve without the approval of the Local Water Authority Mains water feed hot water supply The domestic section of the boiler is de signed to withstand an internal domestic water pressure of 10 bar Where it is likely that the mains domestic water pressure may exceed 5 bar it is possible due to internal water hammer effects that the pressure within the domestic system can increase to a level in excess of the 10 bar limit In these circumstances it is therefore rec ommended that a 3 bar pressure reducing valve be fitted to the incoming mains wa ter supply and a mini expansion vessel in stalled on the domestic circuit These devices will protect the boiler and the domestic system from damage due to ex cessive domestic water pressure Filling A method for initially filling the system and replacing water lost during servicing must be provided and it must comply with loca water authority regulations The correct method is shown in Fig 5 4 The temporary connection must be re moved immediately after filling Control valve Double check valve Temporary 7 connection i out 9 Control valve Supply pipe cold water inlet C h return pipe Fig 5 4 The installer should ensure that no leaks ex ist either inside the boiler or on the system as frequent filling of the system could cause premature scaling of the heat exchanger 5 9 Domest
46. ipe If this fails to remedy the problem the assis tance of a Gas Safe registered installer or in IE a competent person should be sought 3 4 Periodic maintenance For efficient and continuous operation of the boiler it is advisable to arrange mainte nance and cleaning by an Authorised Ser vice Centre Engineer at least once a year During the service the most important com ponents of the boiler will be inspected and cleaned This service can be part of a main tenance contract In particular you are advised to have the following checks carried out primary heat exchanger domestic hot water heat exchanger burn exhaust fume duct and flue pressurisation of the expansion tank filling up of the central heating circuit bleeding of air fromthe central heating system general check of the appliance s opera tion 3 5 External cleaning Before carrying out any clean ing disconnect the appliance from the electrical mains using the fused spur isolation switch fitted adjacent to the appliance To clean the external panels use a cloth soaked in soapy water Do not use solvents abrasive powders or sponges 18 USEFUL ADVICE Do not carry out cleaning of the appliance and or its parts with readily flammable sub stances for example petrol alcohols naph tha etc 3 6 Operational faults If the lock out signal lamp comes on this indicates that the safety lock out 6 Fig
47. ipes should be insulated to prevent heat loss and to avoid freezing Particular attention should be paid to pipes passing through ventilated spaces in roofs and under floors By pass The appliance includes an automatic by pass valve which protects the main heat exchanger in case of reduced or interrupted water circulation through the heating system due to the closing of thermostatic valves or cock type valves within the system The by pass is calibrated to assure a mini mum flow of 200 300 Its hr through the main heat exchanger If you are installing a system that includes thermostatic radiator valves TRV and or small bore 8 10 mm it may be necessary to fit an external by pass to facilitate correct operation of the boiler The fitting of an external bypass helps to prevent and limit system noise Air release points These must be fitted a tall high points where air will natural collect and must be sited to facilitate complete filling of the system Expansion vessel The appliance has an integral sealed ex pansion vessel to accommodate the in crease of water volume when the system is heated Refer to Fig 4 4 on page 30 for its technical data If the heating circuit has an unusually high water content calculate the total expansion and add an additional sealed expansion vessel with adequate capacity Mains water feed central heating There must be no direct connection to the 294 GENERAL REQUIREMENTS ma
48. itable drain pipe 4 detecting the smell of gas don t operate any electrical switches the telephone or any device that may produce sparks open the windows and doors at once to create a draught of air which will purge the area shut off the gas cocks get the assistance of a qualified person Emergency telephone number Tel 0800 111999 WARNING 4 Do not touch the appliance with parts of the body that are wet or damp and or bare feet 4 Do not block or modify the condensate outlet and pipework In case of structural work or maintenance near the exhaust duct and or fume exhaust devices or their attachments turn off the appliance On completion of the work have a professionally qualified person check their efficiency 4 Repairs under guarantee must be carried out only by a Biasi an approved engineer us ing genuine spare parts Thus do no more than switching off the boiler yourself see the instructions Your boiler allows heating up of water to a temperature less than boiling point must be connected to a central heating system and or a hot water supply system com patible with its performance and output can be used only for those purposes for which it has been specially designed must not be touched by children or by those unfamiliar with its operation must not be exposed to weather conditions 4 During the operation it is quite normal that the boiler produces a white plume of conden sation vapou
49. k follow 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 Thermostat Temperature gauge Description Sealed phial and capillary containing liquid Known hazards irritating to skin eyes and throat Vapour is harmful Inflammable do not extinguish with water Precautions Do not incinerate Avoid contact with broken leaking phials Do not purposely puncture First aid medical attention must be sought following eyes skin contact wash with clean water Sharp Edges Caution should be taken when handling the boiler to avoid sharp edges on the boiler Boiler installation and commissioning tips 4 The installation must be carried out by a qualified Gas Safety Registered Engineer who will be responsible for observing the current Regulations and the completion of the Benchmark Gas Boiler System Commissioning Checklist located at the back of this User manual Installing the boiler 4 Do not forget to remove the transit caps and plugs from the boiler connections these are fitted to every boiler Keep the boiler clear of dust during installation and in particular do not allow any dust or debris to enter the top of the boiler where the flue connection is made It is recommended that you put a dust sheet over the top of the boiler until you are ready to make the flue connection
50. ling procedure to page 10 If top ping up with water has to be done very fre quently have the system checked for leaks If water comes out of the pressure relief valve Check on the temperature and pressure gauge that the pressure in the central heat ing circuit is not close to 3 bars In this case temperature rise in the circuit can cause the pressure relief valve to open So that this does not happen and to de crease the pressure to a normal value it is advisable to vent some of the water in the appliance through the bleed valves present in the radiators If in time a reduction in domestic hot water supply is observed The likely causes may be impurities caught in the domestic hot water flow switch filter or limescale deposited in the domestic hot wa ter heat exchanger It is advisable to have the appliance cleaned out by an Authorised Service Centre Engineer 19 USEFUL ADVICE If water should occasionally leak from the boiler shut off the valves positioned under the boiler Fig 2 11 on page 13 and call an Au thorised Service Centre Engineer If the left appliance operation light 10 Fig 3 3 flashes very quickly the boiler is detecting a fault LL ES A NI mm 54 h 10 8 Fig 3 3 In this case or in case of prob lems other than those men tioned here switch off the boil er as described in section Extinguishing to page 13 and call a compe
51. lling of the system Open the c h flow and return valves Remove the front panel of the case sec tion Dismantling the external panels to page 53 Unscrew the cap on the automatic air purger valve 26 in Fig 7 2 one full turn and leave open permanently Fig 7 2 45 z lt x m l E 2 lt x m a COMMISSIONING Gradually open stopcock at the filling point connection to the c h system until water is heard to flow do not open fully Open each radiator air vent starting at the lowest point of the system and close it only when clear water free of bubbles flows out Purge the air from the pump by unscrew ing the pump plug 27 Fig 7 2 release the pump shaft by turning in the direction indicated by the arrow on the information plate Replace the pump plug Continue filling the system The actual reading should ideally be 1 3 bar and not less than 0 3 bar Close all air release valves on the c h system Inspect the boiler and the system for wa ter soundness and remedy any leaks dis covered Cold flush the system to remove any loose particles and any system debris be fore starting the boiler for the first time The flushing procedure must be in line with BS7593 2006 Treatment of Water in d h w c h Systems When the installation and second fill ing are completed turn on the c h sys tem and run it until the temperature h
52. mple shown in Fig 2 15 ON time 7 45 J OFF time 10 30 a THE ON lo tut e o 3 J Fig 2 15 Activating the timed settings Set the mode selector switch A to the AUTO position shown in Fig 2 16 The current time appears in the display The ON OFF display H indicates the current state of operation according to the settings Fig 2 16 Note when the mode selector switch A is in the AUTO position and the boiler is switched off at the fused spur isolation switch the display H indicates only the OFF state The other indications are blanked Reading the timed settings Set the mode selector switch A to the C1 po sition The symbols shown in Fig 2 14 ap pears in the display Press the enter button C Each time the button is pressed the display shows the de tails of the next setting Changing or deleting the timed settings Set the mode selector switch A to the C1 po sition The symbols shown in Fig 2 14 ap pears in the display INSTRUCTIONS FOR USE Press the enter button C until the display shows the setting to be modified or deleted The time setting can be modified now by pressing button D or E and the operation can be switched on or off by pressing the button F To delete a time set press the button D or E until the symbols shown in Fig 2 14 appears in the time display G The new settings are memorized by moving the switch A to a different position M
53. n off the gas cock before carrying out any procedures whatsoever for cleaning maintenance opening or dismantling boiler panels 9 2 Dismantling the external panels Front panel Loosen the three screws A Fig 9 1 Lift and remove the panel Elue exhaust Sampling point Fig 9 1 Side panels Loosen the screws B Bring the bottom of the panels away from the boiler and lift them freeing them from the top hooks Fig 9 2 Fig 9 2 9 3 Emptying the d h w system Turn off the d c w inlet isolating valve and turn on the hot water taps and any drain cocks 9 4 Emptying the c h system Close the c h isolating valves Open the central heating drain cock 24 in Fig 9 3 Wi Fig 9 3 A small quantity of water will remain in the d h w heat exchanger after draining 53 5 Z lt Z Lu lt x MAINTENANCE MAINTENANCE If the boiler is being drained to prevent freezing the d h w heat exchanger must be removed and inverted to drain fully or an antifreeze solution added 9 5 Combustion analysis check If it is necessary to carry out a combustion analysis remove the plugs indicated in Fig 9 1 Reference figures are given in the sections Technical Data on pag 24 or pag 27 Flue gas figures 9 6 Cleaning the primary heat exchanger Take off the front of the case Take off the removable front of the sealed chamber and the f
54. ncluded in the above table a fault may be indicated Reference should be made to the following table In this case switch off the boiler as de scribed in section Extinguishing to page 13 and call a competent and responsible Service Engineer O lt N gt N Faulty c h temperature probe NTC xx Faulty d h w temperature lt probe NTC Faulty flue temperature probe NTC Faulty primary circuit no water or low c h pressure Faulty primary circuit absence of flow Faulty air pressure sen EX sor v Lack of burner ignition no 2 ignition signal from the full seqence ignition device Safety thermostat lock out Flue temperature probe NTC lock out 2 Flame detection error Other faults Lack of power supply or fauly electr control p c b O O Meaning of symbols Lamp OFF Lamp ON Flashing lamp alone or simultane ously with an other lamp Flashing lamp alternate with another lamp INSTRUCTIONS FOR USE 2 INSTRUCTIONS FOR USE 2 14 Warnings Biasi UK Ltd support the Benchmark ini tiative The Benchmark Log Book is locat ed at the back of this manual and should be completed by the Installing Commis sioning Engineer and handed over to the User for future reference by other visiting Engineers Also included is the Service Interval Record card that should be com pleted by the Service Enginee
55. r each model 6 4 Overall dimensions The boiler respects the following dimen sions B C A s A gt 5100 198 P 47 T 200 245 Boiler front Flue outlet air intake pipe co axial Flue outlet pipe 80 mm twin kit Air intake pipe 80 mm twin kit Electric connections area C h flow D h w outlet Gas D c w inlet C h return Condensate drain connection area cC rommoou 38 INSTALLATION 6 5 Joints Pipe sizes o d 22 15 15 15 9 25 plastic Functions Gas c h return c h flow D c w inlet D h w outlet Pressure relief valve Condensate drain sizes in mm o d 6 6 Mounting the boiler Take the protective caps off the boiler pipework Thoroughly clean the connections Mount the boiler on its bracket Fix the c h valves gas cock to the boiler using the Ya gaskets Fig 6 3 Fix the 22 mm pipes C c h circuit to the c h valves A and the 22 mm pipe D gas to the cock B using the 77 gaskets Repeat the above procedure for the d c w inlet utilising the 72 cold water inlet valve J the 15 mm copper tail E with its con nection nut and two 72 gaskets Fix the 15 mm copper tail F with the 72 connection nut and a 77 gasket e R S C be or e S Fig 6 3 Connect the pipe G Fig 6 4 from t
56. r following the annual service maintenance of the boiler and system All Gas Safe Registered Installers carry a Gas Safe ID card and have a registration number Both should be recorded in your Benchmark Log Book You can check your Installer is registered by calling Gas Safe direct on 0800 408 5500 or go on line at www GasSafeRegister co uk In order to guarantee safety and correct op eration it is essential that all the tests are carried out by a competent and responsible service engineer before lighting up the boiler The tests are described in the installation in structions in section 7 commissioning Ensure that the c h circuit is regularly filled with water even if the boiler is only used for d h w supply checking that the pressure indicated on pressure gauge 4 is not lower than that shown in Fig 2 2 If the pressure reading on the pressure gauge is below that shown in Fig 2 2 then the system will require topping up A filling loop is normally provided by the Installer for this purpose If you are in any doubt regarding this pro cedure you are advised to contact your Installer or an Approved Engineer This appliance is provided with a built in anti freeze system that operates the boiler when the temperature is below 5 Therefore when the boiler is not lit or used in cold weather with consequent risk of freezing do not switch off the boiler at the fused spur isolation switch or close the gas inlet cock Wh
57. r from the flue terminal This is due to the high efficiency of the appliance and may be particularly evident with low outdoor temperatures Safe handling of substances Biasi products are manufactured in accordance with ISO 9001 and do not and will not contain any hazardous materials or substances such as asbestos mercury or C F C s The appliance packaging does not contain any substances which may be considered a hazard to health When handling or lifting always use safe techniques keep your back straight bend your knees don t twist move your feet avoid bending forwards and side way sand keep the load as close to your body as possible Where possible transport the boiler using a sack truck or other suitable trolly Always grip the boiler firmly and before lifting feel where the weight is concentrated to estab lish the centre of gravity repositioning yourself as necessary Combustion chamber panels Material mineral fibres sd Known hazards Some people can suffer 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 general normal handling and use will not present high ris
58. ront panel of the com bustion chamber If you notice dirt on the fins of the primary heat exchanger 440n page 23 Cover the sloping surfaces of the burner 410n page 23 entirely in a protective layer sheets of newspaper or similar Brush out the primary heat exchanger 440n page 23 with a bristle paintbrush 9 7 Checking the pressurisation in the expansion vessel Empty the central heating systemas de scribed in section Emptying the c h sys tem to page 53 and check that the expan sion vessel pressure is not less than 1 bar See also section Expansion vessel to page 30 If the pressure is lower take steps to correct the pressure level BA 9 8 Cleaning the burner The sloping and multi gas type burner 410n page 23 does not need special main tenance but it is sufficient to dust it with a bristle paintbrush To reach the burner Take off the front of the case Take off the removable front of the sealed chamber and the front panel of the com bustion chamber Brush out the burner with a bristle paint brush 9 9 Checking the flue Have the integrity of the flue outlet pipe 50on page 23 air intake pipe 51on page 23 checked periodically the air pressure sensor 19on page 22 and the efficiency of the flue safety circuit checked at least once a year For details see the section Fan and air pressure sensor in the service manual For all the above maintenance operations it is advis
59. rrect section for boiler Guarantee registration Finally advise the User that for continued safe and efficient operation the appliance must be serviced by a competent person at least once a year z lt x m a E 50 GAS CONVERSION 8 GAS CONVERSION 8 1 Warnings The commissioning of this boiler and system must only be undertaken by Safe ty Registered Engineer qualified to work on Liquefied Gas Petroleum Gas LPG Components used to adapt it to the type of gas available must be genuine parts only 8 2 Procedures Check that the gas cock fitted Ay under the boiler is turned off and the appliance is switched off at the mains isolating spur Closed position Fig 8 1 Remove the front panel of the case see the section General access and emptying hydraulic circuits in the service manual Take off the lid of the sealed chamber Take the front panel of the combustion chamber off and remove the burner 410n page 23 See section gnition and detec tion electrodes in the service manual for detailed instructions Carry out the conversion for the type of gas replacing the burner injectors cor rectly Re assemble the burner the front panel of the combustion chamber Switch on the appliance at the mains iso lating spur Turn the boiler OFF positioning the func tion selector 8 as indicated in Fig 8 2 4 N d m Disconnect t
60. s for servicing and the lowering of the front control panel saf 2 lt x m l E z lt x E E INSTALLATION If the boiler is installed outside cover the appliance to protect it against the ele ments and add some special anti freeze neutralised to the c h system Before installing the boiler on an existing c h system flush it out thoroughly be fore fitting the boiler so as to remove muddy deposits It is advisable to equip the system with a sediment filter or use a water treatment product in the circulating water The latter option in particular not only cleans out the system but also has an anti corrosive effect by promoting formation of a protective skin on metal surfaces and neu tralising gases present in the water We recommend the use of a suitable univer sal inhibitory to protect the c h system from corrosion 6 3 Installing the bracket Precautions Before mounting the bracket check that the dimensions for fitting the exhaust fume duct are complied with refer to the leaflet includ ed with the flue kit packed separately Utilise the paper template supplied with the boiler to determine the fixing position for the bracket and boiler Securely mount the bracket to the wall using appropriate fixings suitable for the type of wall construction and capable of supporting the total wet load Refer to the weight given in the technical data tables specific fo
61. se provided air vent 5 6 Ventilation If installed in a cupboard or compartment it is not necessary to provide additional venti lation for cooling for this particular product However consideration must be given to clearance requirements for maintenance section Precautions for installation to page 37 and under no circumstances must stored articles be allowed to come into con tact with the boiler or flue pipe 5 7 Condensate drain Ensure that the condensate discharge com plies with the national or local regulations in force The condensate pipe must be fitted in accordance with Building Regulations Drain pipe material should be resistant to acid as the condensate is slightly acid with a pH less than 6 5 The boiler includes a trap 25on page 23 that prevents the combus tion products entering the drain The boilers incorporate a condensate trap with a 75 mm seal to comply with BS6798 2000 The schematic diagrams of possible con nections are given in Fig 5 2 and Fig 5 3 The length of the condensate pipe should be kept to a minimum any external pipe should not be more than 3 m in 32 mm pipe and insulated to prevent freezing To avoid condensate being trapped the drain pipe should be run with a fall of at least 2 5 45 mm m away from the boiler the number of bends and joints should be kept at minimum the drain pipe should be adequately fixed to prevent pipe sagging If a part of the drainpipe runs ext
62. sed to external air It must not be installed so that the terminal discharges into an other room or space as 31 2 lt x m z z B GENERAL REQUIREMENTS an outhouse or lean to It is important that the position of the terminal allows a free passage of air across at all times The terminal should be located with due regard for the damage or discoloration that might occur to building products in the vicin ity In cold and or humid weather water vapour may condense on leaving the flue terminal the effect of such steaming must be con sidered Pluming may easily occur at the terminal Where possible terminal position which could cause a nuisance should be avoided The minimum acceptable spacing from the terminal to obstructions and ventilation openings are specified in Fig 5 1 J Fig 5 1 Terminal position mm A Directly below the window or other opening 300 B Below gutters soil pipes or drain pipes 75 C Below eaves 200 D Below balconies 600 E Below car port roof NO F From vertical drain pipes and soil pipes 150 G From internal corners 450 H From external corners 300 Above ground or balcony lev el J From a next door boundary K From a terminal facing a termi nal 2500 L From an opening in the car port e g door window into dwell 300 2500 ing NO M Vertically from a terminal in the same wall 1500 N Horizontally from a terminal
63. t pressure test point 35 D h w temperature probe NTC 36 Three way diverter valve 37 D h w heat exchanger 38 Primary circuit pressure switch 39 Combustion chamber over heat 40 Flame detecting electrode 41 Burner 42 Ignition electrode 43 Combustion chamber 44 Primary heat exchanger 45 C h expansion tank 46 By pass valve 47 Fan pressure connection 48 Domestic water circuit filter 49 D h w flow limiter 50 Flue outlet pipe 51 Air intake pipe z o lt x m 23 INSTALLATION TECHNICAL INFORMATION 4 3 Technical data mod M296 24SM C Heat input Domestic hot water Min Max temperature settings Nominal net ch dhw Maximum pressure Nominal gross ch dhw Minimum pressure Minimun net ch dhw Flow rate minimun Flow rate 30 rise 0 Minimun gross ch dhw Flow rate 35 rise D Flow rate 40 rise Useful output Gas supply pressures Maximun ch dhw Minimun ch dhw Maximun condensing ch dhw Minimun condensing ch dhw Central heating Min Max flow temperature settings Minimum return temperature 1 mbar approximately equals 10 mm H O Maximum pressure Minimum pressure Available head in 1000 l h Seasonal effiency G20 Seasonal effiency G30 G31 to the minimum useful output 24 TECHNI
64. table hose Set the d h w and c h temperature con trol knobs to their maximum position If external controls are fitted e g Time clock room thermostat ensure they call for heat Switch on the boiler and open at least one hot water tap fully Check the maximum gas pressure and compare the value on the gauge with the value indicated in the sections Technical Data on pag 24 or pag 27 gas pres sures at the burner accordingly with the model of boiler installed 47 z lt x m l E z o E COMMISSIONING Check the maximum gas flow at the gas meter and compare the value indicated in the sections Technical Data on pag 24 or pag 27 gas rate accordingly with the model of boiler installed Switch off the boiler Disconnect the gas modulator coil by re moving the electrical connector A Fig 7 6 ise Fig 7 6 e Switch on the boiler e Check the minimum gas pressure and compare the value on the gauge with the value indicated in the sections Technical Data on pag 24 or pag 27 gas pres sures at the burner accordingly with the model of boiler installed Switch off the boiler and re connect the electrical connector A to the modulator coil Switch on the boiler Check that the boiler lights up uniformly If not refer to section Ignition gas pressure adjustment of the Service Manual for the necessary adjustment procedures
65. tent and responsi ble Service Engineer 20 TECHNICAL INFORMATION 4 TECHNICAL INFORMATION 4 1 Overview 2 lt m l E 36 35 31 30 29 28 27 26 25 24 Fig 4 1 2212 z lt x m a E TECHNICAL INFORMATION 4 2 Main diagram 20 50 17 19 44 22 23 c m X 37 IL e 46 49 48 36 5 30 235 13 15 Fig 4 2 11 Condensate drain pipe 12 C h return valve 13 D c w inlet valve 14 Gas inlet valve 15 D h w outlet pipe 16 C h flow valve 17 Fan 2225 18 Air pressure sensor test points 19 Air pressure sensor 20 Flue temperature probe NTC 21 Condensing heat exchanger 22 Safety thermostat 23 C h temperature probe NTC 24 Main circuit drain valve TECHNICAL INFORMATION 25 Condensate trap 26 Automatic air purger valve 27 Pump vent plug 28 Pump 29 C h pressure relief valve 30 D h w flow switch 31 Modulation gas valve 32 Modulation operator 33 Gas valve outlet pressure test point 34 Gas valve inle
66. the 49 3 6 Operational fauls 19 8 GAS CONVERSION 51 4 Tecan INFORMATION 21 d ap E ORDER EUR Overview 21 8 1 Warnings e eR eR 51 25 Main diagram 1 22 8 2 Proced res iss senos unen 51 4 3 Technical data mod 296 245 24 9 MAINTENANCE ERES 53 4 4 Technical data mod 296 285 27 Warnings cese hee rre hn 53 4 5 Hydraulic specifications 30 92 Dismantling the external panels 53 46 30 a EMPING Anw Systemi TEE LEELA STETE P E mptying the c h system 5 GENERAL REQUIREMENTS cad aes pi 9 5 Combustion analysis check 54 52 Lo e sf anal ae ics 54 9 6 Cleaning the primary heat exchanger 54 DOR HON OL QD PINGS 9 7 Checking the pressurisation in the expansion 5 3 Fluesystem ye kp 31 54 G 32 vessel i licensed cope uen f XR 54 55 pos ch sini baton an aana aa iE Ea 33 9 8 Cleaning the 54 S Ve Ss Modems bar A 9 9 54 57 Condo d quA SIS avant AEP 33 9 10 Drain pipe inspection 54 58 Wa i h LEE M EA 34 9 11 Visual inspection of appliance 54 59 Mis en Miu dt eh 35 9 12 Gas pressures and tightness
67. tment In order to achieve optimal settings for econ omy and comfort we recommend adjusting the operating temperature of the c h water according to the outside temperature posi tioning the knob as follows Between From 5 to 15 C 5 and 5 Lower ta than 5 C Fig 2 7 Your qualified installer will be able to recom mend the most suitable adjustment for your system The temperature and pressure gauge 4 Fig 1 3 on page 8 will allow you to check that the set temperature is obtained 2 5 D h w temperature The temperature of the d h w leaving the boiler can be varied from a minimum of about 35 C to a maximum of about 55 C Fig 2 8 by turning the temperature control knob 9 Minimum Maximum Fig 2 8 Adjustment of the d h w temperature is com pletely separate from that of the c h circuit The adjustment system integrated within the boiler automatically controls the flow of gas to the burner in order to keep the tempera ture of d h w delivered constant between the limits of maximum and minimum output Where the demand is at a low level or with the temperature set to the minimum it is nor mal to see a cycle of lighting and extinguish ing of the burner when running Adjustment It is advisable to adjust the d h w tempera ture to a level commensurate with the de mand minimising the need tomix with cold water In this way the automatic control fa ciliti
68. w and that on every occasion you enter a time you must also indicate which days that you want the boiler to follow the timed settings Some products incorporate an anti cycling time delay It is normal when first switching the boiler on for the boiler to operate on heating for a few seconds then switch off After 3 4 minutes has elapsed the boiler will then re ignite and operate perfectly normally The igni tion delay cycle does not prevent normal operation of the boiler to provide d h w If you are any doubts as to the installation or operation of the boiler please read the instruction manuals thoroughly and then if necessary contact Biasi UK for advice and as sistance 4 Guarantee conditions The guarantee registration form must be returned within 30 of purchase failure to comply will invalidate the guarantee Please remember that if you are in any doubt about the installation of this product you can contact our Technical Helpline on tel 01922 714 600 TABLE OF CONTENTS 1 APPLIANCE DESCRIPTION 8 6 3 Installing the bracket a n s seana 38 1 1 OVerVieW naga ba ga Ga a 8 12 Control panel 8 OWNS cep aie pete ee E 1 3 Isolation 8 6 6 Mounting the 39 14 Technical data 2 2 4 sekaa aaa ne aaa esas 9 B i E on Ae c F 1
69. with the requirements of the Gas Safe Installation and Use Regula tions and be approved by Gas Safe Ensure that the Benchmark Log Book is satisfactorily completed during the com missioning process The Log Book is located at the end of this manual This manual should be handed to the User following completion of the installation and commissioning process Failure to comply with these requirements may in validate the manufacturers guarantee For Ireland IE it is necessary to com plete a Declaration of Conformity to indicate compliance to 1 5 813 2002 7 2 Electrical installation Preliminary electrical system checks to en sure electrical safety shall be carried out by a competent person i e polarity earth con tinuity resistance to earth and short circuit If a fault has occurred on the appliance the fault finding procedure should be followed as specified in the service manual 7 3 Gas supply installation Inspect the entire installation including the gas meter test for tightness and purge all as described in BS 6891 For Ireland IE refer to 1 5 813 2002 Open the gas cock 14 Fig 7 1 on the ap pliance and check the gas connector on the appliance for leaks Open position Fig 7 1 7 4 Filling the d h w system Close all hot water draw off taps Open the cold water inlet valve Slowly open each draw off tap and close it only when clear water free of bubbles flows out 7 5 lnitial fi

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