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Biasi M96.28SR/P User Manual And Installation Instructions
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Biasi M96.28SR/P User Manual And Installation Instructions

Biasi M96.28SR/P User Manual And Installation Instructions

Wall hung, fan flue, room sealed, high efficiency gas boiler
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User manual and Installation instructions
Models covered by these instructions
M96.28SR/P
M96.32SR/P
Wall hung, fan flue, room sealed, high efficiency gas boiler
GARDA HE SYSTEM
PARVA HE
Congratulations on your choice.
PARVA 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.
PARVA 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.
Remember that...
The manual
- must be read thoroughly, so that you will be able to use the boiler in a safe and sensible way;
- must be carefully kept. It may be necessary for reference in the future.
First lighting up must be carried out by competent and responsible engineer.
The manufacturer
- disclaim all liability for any translations of the present manual from which incorrect interpretation 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...
Before lighting the boiler you are advised to have a professionally qualified person 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.
Ensure that
- the installer has connected the pressure relief valve outlet to a drain pipe. The manufacturers are not
responsible for damage caused by opening of the pressure relief valve and consequent escape of water,
if not connected correctly to the drain.

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Summary of Contents for Biasi M96.28SR/P

  • Page 1 User manual and Installation instructions Models covered by these instructions M96.28SR/P M96.32SR/P Wall hung, fan flue, room sealed, high efficiency gas boiler GARDA HE SYSTEM PARVA HE Congratulations on your choice. PARVA HE are condensing high efficiency sealed chamber fan flue gas boilers.
  • Page 2 Safe handling of substances Biasi products are manufactured in accordance with ISO 9000 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.
  • Page 3 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. Appliance category II Gas G20 20 mbar, G30 29 mbar, G31 37 mbar 2H3+...
  • Page 4 If you are in 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 assistance. Please remember that if you are in any doubt about the installation of this product you can contact our Technical Helpline on tel.
  • Page 5 Fitting the flue system Choice of flue Electrical connections 6.10 External frost protection 6.11 Connecting a system boiler to a cylinder Commissioning Electrical installation Gas supply installation Initial filling of the system Condensate pipe and traps Lighting the boiler Checking the gas pressure at the burner Checking the burner ignition Adjustment of useful c.h.
  • Page 6 1 Case front panel 2 Control panel 3 Control panel cover 1.2 Control panel 4 C.h. circuit temperature and pressure gauge 5 Lock-out signal lamp 6 Lockout reset button 7 Function selector and c.h. temp. control knob 8 Service knob 9 Appliance operation lights The service knob 8 is useless for the normal operation of the boiler.
  • Page 7 1.3 Isolation valves 10 Condensate drain pipe 11 C.h. return valve 12 Gas inlet valve 13 C.h. flow valve 1.4 Technical data For detailed technical data see sections 4.5 of this manual. 1.5 Operation lights Three lights (9 in Fig. 1.3) give detailed indication regarding the operation of the boiler.
  • Page 8 The following table gives the relationship between each of the possible light combinations and their meaning.
  • Page 9 2 INSTRUCTIONS FOR USE 2.1 Warnings 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/Commiss- sioning Engineer and handed over to the User for future reference by other visiting Engineers. Also included is the...
  • Page 10 Service Interval Record card that should be completed by the Service Engineer following the annual service maintenance of the boiler and system. All CORGI Registered Installers carry a CORGI 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 CORGI direct on 01256 372300.
  • Page 11 3 Close the valves and remove the filling loop. If you experience any difficulty with the operation of the boiler, switch off the boiler immediately at the fused spur isolation switch and contact your Installer or an approved Service Engineer Air introduced into the boiler during this filling process will vent through the automatic air purger fitted to the boiler.
  • Page 12 2.4 C.h. circuit temperature The output temperature of c.h. water is adjustable from a minimum of about 38°C to a maximum of about 85°C (Fig. 2.5), by turning the function selector (7). Fig. 2.5 Adjustment of c.h. output on the boiler is automatic. The greatest output pre-set in the factory can, however, be reduced in level according to actual system requirements.
  • Page 13 Your qualified installer will be able to recommend the most suitable adjustment for your system. The temperature and pressure gauge (4, Fig. 1.3 on page 2) will allow you to check that the set temperature is obtained. 2.5 Extinguishing Fig. 2.7 When you do not expect to use the boiler for a long period: 1.
  • Page 14 3.1 Central heating For reasonably economical service install a room thermostat. Never shut off the radiator 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.
  • Page 15 Do not carry out cleaning of the appliance and/or its parts with readily flammable substances (for example petrol, alcohols, naphtha, etc.). 3.6 Operational faults If the lock-out signal lamp comes on this indicates that the safety lock-out 5 (Fig. 3.2) has stopped the boiler To re-start the boiler, it is necessary to press the boiler reset button 6 (Fig.
  • Page 16 10 Condensate drain pipe 11 C.h. return valve 12 Gas inlet valve 13 C.h. flow valve 14 Condensate trap 15 Main circuit drain valve 16 Automatic air purger valve 17 Pump 18 Pump vent plug 19 Modulation gas valve...
  • Page 17 20 Primary circuit flow switch 21 C.h. temperature probe NTC 22 Flame-detecting electrode 23 Ignition electrodes 24 Burner 25 Combustion chamber 26 Primary heat exchanger 27 Fan 28 Air switch pressure test points 29 Flue temperature probe NTC 30 Air pressure switch 31 Condensing heat exchanger 32 Safety thermostat 33 C.h.
  • Page 18 4.3 Hydraulic specifications The hydraulic specifications in Fig. 4.3 represent the pressure (available head for the central heating system) as a function of the flow rate. Fig. 4.3...
  • Page 19 The load loss due to the boiler has already been subtracted. Output with thermostat cocks shut off The boiler is fitted with an automatic by-pass valve (38 on page 9), which protects the primary heat exchanger. In case of excessive reduction or total blockage of water circulation in the central heating system owing to closure of the thermostatic valves or system component cocks, the by-pass valve ensures a minimum flow of water through the primary heat exchanger.
  • Page 20 Heat input Nominal 29,0 BTU/h 98 942 Minimum 13,0 BTU/h 44 353 Useful output G20 Maximum 28,3 BTU/h 96 488 Minimum 12,1 BTU/h 41 284 Maximum condensing 30,7 BTU/h 104 602 Minimum condensing 13,2 BTU/h 44 965 Useful output G30 G31 Maximum 27,4 BTU/h...
  • Page 21 Gas pressures at the burner Natural Butane Propane Max. 1000 2800 3600 mbar 10,0 28,0 36,0 Min. mbar Ignition 1200 1300 mbar 12,0 13,0 1 mbar approximately equals 10 mm H (A) referred to the net calorific value at 15 °C and 1013,25 mbar G 20 = 34,02 MJ/m G 30 = 45,6 MJ/kg, G 31 = 46,4 MJ/kg (B) The value is used in the UK Government's Standard Assessment Procedure (SAP) for energy rating...
  • Page 22 Other specifications Height Width Depth Weight (dry) 44,5 Water volume in the boiler (up to l(kg) 1 bar) (C) Values refer to tests with a 1 m chimney working at the nominal heat input 4.6 Technical data mod. M96.32SR/... Heat input Nominal 33,3 BTU/h...
  • Page 23 Gas supply pressures Natural Butane Propane Norm. 2 000 2 900 3 700 mbar 2 500 3 500 4 500 mbar Min. 1 700 2 000 2 500 mbar 1 mbar approximately equals 10 mm H Gas pressures at the burner Natural Butane Propane...
  • Page 24 Flue design Nominal heat flow rate (A) (C) 33,3 Exhaust temperature °C Mass flow rate 21,5 Flue gas figures Nominal heat input (A) (C) 33,3 content content CO content Exhaust temperature °C Other specifications Height Width Depth Weight (dry) 50,0 Water volume in the boiler (up to l(kg) 1 bar)
  • Page 25 For Ireland (IE), reference should be made to the current edition of I.S.813.2002 and the current ETCI rules for electrical installations. Where a room-sealed appliance is installed in a room containing a bath or shower, any electrical switch or appliance control, utilising mains electricity should be so situated that it cannot be touched by a person using the bath or shower.
  • Page 26 Terminal position C. Below eaves D. Below balconies∗ E. Below car port roof From vertical drain pipes and soil pipes G. From internal corners∗∗ H. From external corners Above ground or balcony level From a surface facing a terminal K. From a terminal facing a terminal 1 200 L.
  • Page 27 (Fig. 5.2). Fig. 5.2 The length of the condensate pipe should be kept at minimum. To avoid condensate being trapped: - the drainpipe 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 drainpipe should be adequately fixed to pevent pipe sagging.
  • Page 28 Air release points These must be fitted at all high points where air will natural collect and must be sited to facilitate com- plete filling of the system. Expansion vessel The appliance has an integral sealed expansion vessel to accommodate the increase of water volume when the system is heated.
  • Page 29 5.10 Electrical supply WARNING: this appliance must be earthed. External wiring to the appliance must be carried out by a competent person and be in accordance with the current I.E.E. Regulations and any local regulations which apply. Reference should be made tu the current ETCI rules for electrical installations. For Ireland (IE), refer to I.S.813.2002.
  • Page 30 during installation. - To allow maintenance procedures it is necessary to leave the minimum gaps indicated in Fig. 6.1. Fig. 6.1 (all dimensions in mm) - When installing the boiler in a cupboard, cover or alcove allow at least 50mm permanent clearance from the front face of the boiler.
  • Page 31 6.5 Joints Tab. 6.1 (sizes in mm o.d.) Functions Pipe sizes (o.d) Gas, c.h. return, c.h. flow ø 22 Pressure relief valve ø 15 Condensate drain ø 25 (plastic) 6.6 Mounting the boiler 1. Take the protective caps off the boiler pipework. 2.
  • Page 32 Fig. 6.3 Fig. 6.4...
  • Page 33 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 consideration that the horizontal sections of the flue pipe must have an horizontal sloping not less than 1.5 deg.
  • Page 34 6.8 Choice of flue The following flue kits are available for connecting to the boiler: Standard horizontal flue kit (Fig. 6.6A) Co-axial 60/100mm - nominal length 1m This kit is normally supplied with the boiler and can be fitted to allow discharge to the rear or either side of the boiler via the flanged boiler adapter elbow.
  • Page 35 45° reduce length by 0,5 m. 90° reduce length by 1 m. Twin pipe kits ø 80 mm (Fig. 6.7) Fig. 6.7 Various twin (split) pipes kits and optional accessories (elbows) are available to assist 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 pipe from the pipe that discharges the exhaust gasses.
  • Page 36 Tab. 6.2 For M96.32SR/... Equivalent length (air duct + flue duct) Restrictor Between 1 and 24 m ø 50 mm Vertical- roof kit (Fig. 6.9) Fig. 6.9 This kit allows vertical termination of the flue pipe through the roof. The kit is 1.2 m in length. Extension pieces (Co-axial) are also available which allows the flue system to be extended to a total overall maximum permissible length.
  • Page 37 Fig. 6.10 3 Loosen the screws H. 4 Remove the side panels or move the lower part of the side panels as indicated in Fig. 6.11 and pull the control panel. Fig. 6.11...
  • Page 38 When completely pulled out, the panel can rotate 45° downwards to facilitate the operations on the internal parts. 5 Loosen the screws I and remove the service panel (Fig. 6.12). Fig. 6.12...
  • Page 39 For the electrical connection to the boiler use electric wires which conform to the current regulations, with flexible cord, each core having a cross section area not less than 0,75mm 6 Connect the electrical supply flexible cord coming from the fused spur isolation switch to the power supply terminal block of the boiler (Fig.
  • Page 40 Do not connect live wires to terminals to which the room thermostat must be connected. 9 Route the electrical supply flexible cord and the external control flexible cord as illustrated in Fig. 6.15. Fig. 6.15 Lock the flexible cords in place with the flexible cord clamps 6.10 External frost protection 10 Connect the frost thermostat between terminals 1 and 2 as shown in Fig.
  • Page 41 Do not connect live wires to terminals to which the room thermostat must be connected. 6.11 Connecting a system boiler to a cylinder Two schematic wiring diagrams are given in this section showing two possible ways to connect an external programmer to a mid-position diverter valve to provide independent timed and thermostatic control of heating and hot water.
  • Page 42 Fig. 6.18 - Not permanent live Y-plan...
  • Page 43 The lower part shows how to realize a system that provides independent timed and thermostatic control of heating and hot water.
  • Page 44 Fig. 6.17 the boiler is permanently connected to the main supply. The boiler operation is controlled by the external control terminal block. Fig. 6.18 the boiler is not permanently connected to the supply line. The boiler operation is controlled by switching the mains supply. In this case, when the boiler is switched off some important features like the antifreeze system, the monitoring of the boiler by the operation lights, the post circulation of the pump, etc.
  • Page 45 7.3 Initial filling of the system 1. Open the c.h. flow and return valves. 2. Remove the front panel of the case (see the section 9.2 in this manual. 3. Unscrew the cap on the automatic air purger valve 16 (Fig.
  • Page 46 During this operation we highly recommend the use of a c.h. flushing detergent in the quantities as specified by the appropriate manufacturer, whose function it is to dissolve any foreign matter which may be in the system. The above operation could save the invalidation of your boilers guarantee and will also prevent problems which you may experience in the future if an inhibitory is not used.
  • Page 47 2 Loosen the internal screw 35 (Fig. 7.4) on the Outlet Pressure Test Point of the Gas Valve and connect a pressure gauge using a suitable hose. Fig. 7.4 3 Set the c.h. temperature control knob to its maximum position. If external controls are fitted (e. g. Timeclock, room thermostat) ensure they “call for heat”.
  • Page 48 If the maximum and minimum gas pressures measured above are not in accordance with the technical data (sections 4.5 ) then adjustment will be necessary. A full explanation of the gas pressure adjustment procedure is given in the Gas Valve section of the service manual. If maximum and/or minimum gas pressures are adjusted then the ignition gas pressure must be checked and adjusted if necessary.
  • Page 49 The following procedure allows the output of the boiler for central heating to be adjusted to meet the system requirement. Refer to Fig. 7.11, Fig. 7.12 Fig. 7.13 (depending on the gas used) and determine the correct burner pressure appertaining to the output required for the central heating requirement. 1 Remove the front panel of the case.
  • Page 50 8 Rotate the service knob 8 in Fig. 7.6 to obtain the pressure to the burner to meet with the cen- tral heating system requirements. Refer to the diagrams shown in Fig. 7.11, Fig. 7.12 Fig. 7.13 By rotating clockwise the pressure increases. 9 Make a note of the position of the knob 8 and recorded this in Fig.
  • Page 51 14 To reset the boiler to the normal operation turn it OFF and ON by the function selector 7. In any case, the boiler automatically resets to its normal operation after 10 minutes. Fig. 7.11 Fig. 7.12 Fig. 7.13...
  • Page 52 7.9 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 5 (Fig. 1.3 on page 2) must appear. To reset the boiler press and release the boiler reset button 6 (Fig.
  • Page 53 Explain the function and use of the function selector. Explain and demonstrate the function of 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 damage 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 correct section for boiler Guarantee registration.
  • Page 54 Fig. 8.2 Fig. 8.3 At this step it is possible to visualize the current setting by keeping the reset button 6 pressed for more than 5 seconds. The lamps 9 will flash a number of times corresponding to the setting of the knob 8 in Fig.
  • Page 55 13 To change the setting turn the knob 8 on a position corresponding to the gas used as shown in Fig. 8.4. By turning the knob 8, the lock-out signal lamp 5 blinks quickly (2 per seconds) indicating that the setting has changed and must be memorised.
  • Page 56 Fig. 9.1 2 Lift and remove the panel. Side panels 3 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 Fig. 9.3...
  • Page 57 9.3 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 4.5 of this manual (Flue gas figures). 9.4 Cleaning the primary heat exchanger 1 Takeoff the front of the case.
  • Page 58 Have the integrity of the flue outlet pipe (40 on page 9) air intake pipe (41 on page 9), checked periodically, the venturi device∗ (39 on page 9) cleaned and the efficiency of the flue safety circuit checked at least once a year. ∗...
  • Page 59 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 Biasi UK Ltd Newman Park, Western Way Wednesbury, WS10 7BJ...

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M96.32sr/p