Biasi RIVA PLUS M90D.24S Page 35 User Manual And Installation Instructions Download

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Installation

Valve colour key
BR --- Brown

BL --- Blue

GR --- Grey

OR --- Orange

MAINS

230V a.c.

Switched 3 Amp fused,

spur

Programmer

Room thermostat

Cylinder

thermostat

Mid---position

diverter valve

Relay

Remove room

thermostat link

M90D.24SR

M90D.28SR

External control

terminal block

Power supply

terminal block

Fig. 6.17 --- relay controlled boiler

Valve colour key
BR --- Brown

BL --- Blue

GR --- Grey

OR --- Orange

MAINS

230V a.c.

Switched 3 Amp fused,

spur

Programmer

Room thermostat

Cylinder

thermostat

Mid---position

diverter valve

Do not

remove room

thermostat link

M90D.24SR

M90D.28SR

External control

terminal block

Power supply

terminal block

Fig. 6.18 --- directly controlled boiler

LLA

Summary of Contents for RIVA PLUS M90D.24S

Page 1: ...User manual and Installation instructions RIVA PLUS Models M90D 24S M90D 28S M90D 24SR M90D 28SR ...

Page 2: ......

Page 3: ...nnected 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 n On 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...

Page 4: ... Thermostat Temperature gauge Description Sealed phial and capillary contain ing 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 follow ing eyes skin contact wash with clean water Appliance cat...

Page 5: ... It is also sensible to initially fire and com mission the boiler before connecting any ex ternalcontrols such as a room thermostat By this method if you have a subsequent prob lem following the addition of an external con trol you can eliminate the boiler from your fault analysis n Do not forget to range rate the boiler to suit the system requirements This pro cedure is covered in the commissioni...

Page 6: ...4 6 6 Mounting the boiler 24 6 7 Fitting the flue system 25 6 8 Flue restrictors 25 6 9 Choice of flue 25 6 10 Electrical connections 26 6 11 External frost protection 28 6 12 Connecting a M90D 24SR or M90D 28SR system boiler to a cylinder 28 7 Commissioning 30 7 1 Electrical installation 30 7 2 Gas supply installation 30 7 3 Filling the d h w system 30 7 4 Initial filling of the system 30 7 5 Lig...

Page 7: ...lector and c h temperature control knob 9 D h w temperature control knob 10 Appliance operation lights 1 3 Isolation valves 13 11 15 12 14 Fig 1 2 bottom view of the boiler 11 C h return valve 12 D c w inlet valve 13 Gas inlet valve 14 D h w outlet pipe 15 C h flow valve 1 4 Technical data For detailed technical data see section 4 4 or 4 5 of this manual 10 8 9 7 6 4 5 M90D 24S M90D 28S M90D 24SR ...

Page 8: ...y operating boiler Function selector in or position C h operation D h w operation Frost protect operation D h w operation Excessive temperature on primary circuit Faulty c h temperature probe NTC Faulty d h w temperature probe NTC Faulty primary circuit no water or absence of flow Lack of burner ignition no ignition signal from the full seqence ignition device Ignition gas pressure adjustment Mini...

Page 9: ...ro cedure you are advised to contact your In staller or an Approved Engineer This appliance is provided with a built in anti freeze system that operates the boiler when the temperature is below 4 ûC 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 When you do not...

Page 10: ...iance operation light 10 will flash every 2 seconds operating boiler 8 10 Fig 2 6 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 7 by turning the function se lector 8 Adjustment of c h output on the boiler is auto matic The greatest output pre set in the factory can however be reduced in level according to...

Page 11: ...emand is at a low level or with the tem perature set to the minimum it is normal to see a cycle of lighting and extinguishing of the burner when running Adjustment It is advisable to adjust the d h w temperature to a level commensurate with the demand minimis ing the need to mix with cold water In this way the automatic control facilities will be fully exploited Moreover where the amount of limesc...

Page 12: ...e switch 5 Fig 1 3 on page 1 which controls the c h operation J A B C D E F G I H Fig 2 14 Display and control panel A Mode selector switch B Reset button C Enter button D Increase setting button E Decrease setting button F On off button G Day selection buttons H Day display I Time display J ON OFF display Setting the current time and weekday Note with a new unit or when the reset button B has bee...

Page 13: ...sition and the boiler is switched off at the fused spur isolation switch the display J indicates only the OFF state The other indications are blanked Reading the timed settings Set the mode selector switch A to the C1 position The symbols shown in Fig 2 16 appears in the display Press the enter button C Each time the button is pressed the display showsthe detailsof thenext setting Theday display H...

Page 14: ...ton F The time delay can be set within the following 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 J flashes indicating that the current state of operation has been forced To delete the timed delay setting set the mode se lector switch A in the TIMER position press the bu...

Page 15: ...ircuit bleeding of air from the central heating system general check of the appliance s operation 3 4 External cleaning Before carrying out any cleaning 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 powd ers or sponges Do not carry ...

Page 16: ...upply is observed The likely causes may be impurities caught in the domestic hot water flow switch filter or limescale deposited in the domestic hot water heat ex changer It is advisable to have the appliance cleaned out by an Authorised Service Centre En gineer If water should occasionally leak from the boiler shut off the valves positioned under the boiler Fig 2 13 on page 6 and call an Authoris...

Page 17: ...dulation gas valve 24 Primary circuit flow switch 25 C h temperature probe NTC 26 Three way diverter valve 27 Flame detecting electrode 28 Ignition electrodes 29 Burner 30 Combustion chamber 31 Primary heat exchanger 32 Air pressure switch 33 Air switch pressure test points 34 Fan 35 Safety thermostat 36 Modulation operator 37 Gas valve outlet pressure test point 38 Gas valve inlet pressure test p...

Page 18: ...Technical information 12 4 2 Main diagram M90D 24S M90D 28S 42 32 46 45 24 31 28 37 19 18 22 23 38 21 26 39 41 43 11 12 15 13 40 34 27 25 16 14 36 35 29 17 44 Fig 4 2 INSTALLATION ...

Page 19: ...Technical information 13 4 3 Main diagram M90D 24SR M90D 28SR 42 32 46 45 24 31 28 37 19 18 23 38 21 41 11 15 13 40 34 27 25 36 35 29 17 Fig 4 3 INSTALLATION ...

Page 20: ...min 2 5 30û rise l min 11 6 35û rise l min 10 0 40û rise l min 8 7 Injectors Natural G20 130 Butane G30 77 Propane G31 77 Gas supply pressures Gas norm min max Natural G20 Pa mbar 2 000 20 1 700 17 2 500 25 Butane G30 Pa mbar 2 900 29 2 000 20 3 500 35 Propane G31 Pa mbar 3 700 37 2 500 25 4 500 45 Gas pressures at the burner Gas min max Ignition Natural G20 Pa mbar 180 1 8 1 170 11 7 600 6 0 Buta...

Page 21: ... mm 80 Roof mm 80 125 Nominal heat flow rate kW 26 6 Exhaust temperature ûC 145 Smoke production kg h 55 1 Flue gas figures Nominal heat input kW 26 6 CO2 content 7 0 O2 content 8 4 CO content ppm 150 Exhaust temperature ûC 145 Other specifications Height mm 703 Width mm 400 Depth mm 325 Weight dry kg 37 Water volume in the boler up to 1 bar l kg 1 0 Values refer to tests with a 1 m chimney workin...

Page 22: ... 2 Injectors Natural G20 130 Butane G30 77 Propane G31 77 Gas supply pressures Gas norm min max Natural G20 Pa mbar 2 000 20 1 700 17 2 500 25 Butane G30 Pa mbar 2 900 29 2 000 20 3 500 35 Propane G31 Pa mbar 3 700 37 2 500 25 4 500 45 Gas pressures at the burner Gas min max Ignition Natural G20 Pa mbar 180 1 8 1 170 11 7 600 6 0 Butane G30 Pa mbar 450 4 5 2 760 27 6 1 200 12 Propane G31 Pa mbar 5...

Page 23: ...C 165 Smoke production kg h 70 6 Flue gas figures Nominal heat input kW 31 1 CO2 content 6 3 O2 content 9 7 CO content ppm 100 Exhaust temperature ûC 165 Other specifications Height mm 703 Width mm 400 Depth mm 325 Weight dry kg 39 Water volume in the boler up to 1 bar l kg 1 1 Values refer to tests with a 1 m chimney working at the nominal heat input INSTALLATION ...

Page 24: ...thermostatic valves or sys tem component cocks the by pass valve ensur es a minimum flow of water through the primary heat exchanger 4 7 Expansion vessel Note this boiler is designed for operation only in a sealed central heating system The height difference between the pressure relief valve and the highest point in the system may be 7m at most For greater differences increase the pre load pressur...

Page 25: ... in any room or in ternal space although particular attention is drawn totherequirementsof thecurrent I E E Wir ing Regulations and in Scotland 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 I S 813 2002 and...

Page 26: ... accordance with BS 6891 and the complete installation should be tested for soundness For Ireland IE refer to I S 813 2002 5 5 Air supply The room in which the boiler is installed does not require a purpose provided air vent 5 6 Ventilation If installed in a cupboard or compartment it is not necessary to provide additional ventilation for cooling for this particular product However con sideration ...

Page 27: ...ducing valve be fitted to the incoming mains water supply and a mini expansion vessel installed on the domestic circuit These devices will protect the boiler and the do mestic system from damage due to excessive do mestic water pressure Filling A method for initially filling the system and replac ing water lost during servicing must be provided and it must comply with local water authority regu la...

Page 28: ...tallations For Ireland IE refer to I S 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 double pole isola tor having a contact separation of at least 3 mm between poles or alternatively by the use of a 3A fused ...

Page 29: ... duct de tailed in section 6 7 and the correctprocedures 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 necess ary to leave the minimum gaps indicated in Fig 6 1 25 50 250 200 Fig 6 1 all dimensions in mm When installing the boiler in a cupboard cover or alcove allow at least50m...

Page 30: ...sions in mm 6 5 Joints Functions Pipe sizes Gas c h return c h flow ø 22 D c w inlet ø 15 D h w outlet ø 15 Pressure relief valve ø 15 not present on M90D 24SR and M90D 28SR models Tab 6 1 sizes in mm o d 6 6 Mounting the boiler 1 Take the protective caps off the boiler pipe work 2 Thoroughly clean the connections 3 Mount the boiler on its bracket 4 Fix the c h valves A and gas cock B to the boile...

Page 31: ...ng flue kits are available for connecting to the boiler Standard horizontal flue kit Fig 6 6A Co axial 60 100mm nominal length 1m Thiskitisnormally supplied with theboiler and can be fitted to allow discharge to the rear or either side of the boiler via the flanged boiler adapter elbow Minimum length required is 0 3 m Maxi mum equivalent length of 4 metres can be achieved utilising extensions This...

Page 32: ...es Flue exhaust a Air intake b Fig 6 8 all dimensions in metres Vertical roof kit Fig 6 9 This kit allows vertical termination of the flue pipe through the roof The kit is 1 2 m in length Exten sion pieces Co axial are also available which al lows the flue system to be extended to a total overall maximum permissible length Optional 45û and 90û elbowscan beused tooffset the flue route max 8 5 m Fig...

Page 33: ... cross sec tion area not less than 0 75 mm2 6 Connect the electrical supply flexible cord coming from the fused spur isolation switch to the power supply terminal block of the boiler Fig 6 13 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 recommended Do not connect live wires to terminals to which the room ...

Page 34: ... To the external control device isolation switch Fig 6 15 6 11 External frost protection 10 Connect the frost thermostat between ter minals 1 and 2 as shown in Fig 6 16 Do not connect live wires to terminals to which the room thermostat must be con nected Power supply terminal block External controls terminal block T Room thermostat T Frost thermostat 1 2 L N 3 Fig 6 16 6 12 Connecting a M90D 24SR...

Page 35: ...ternal control terminal block Power supply terminal block L N 3 2 1 Fig 6 17 relay controlled boiler BL GR BR OR Valve colour key BR Brown BL Blue GR Grey OR Orange MAINS 230V a c Switched 3 Amp fused spur Programmer Room thermostat Cylinder thermostat Mid position diverter valve L N Do not remove room thermostat link M90D 24SR M90D 28SR External control terminal block Power supply terminal block ...

Page 36: ... the gas connector on the appliance for leaks Open position 13 12 Fig 7 1 7 3 Filling the d h w system 1 Close all hot water draw off taps 2 Open the cold water inlet valve 12 Fig 7 1 3 Slowly open each draw off tap and close it only when clear water free of bubbles flows out 7 4 Initial filling of the system 1 Open the c h flow and return valves 2 Remove the front panel of the case see the sectio...

Page 37: ...few sec onds then switch off After 3 4 minutes has elapsed the boiler will then re ignite and operate perfectly normally The ignition delay cycle does not prevent normal operation of the boiler to pro vide d h w If externalcontrols are fitted e g Timeclock room thermostat ensure they call for heat 1 Turn on the electricity supply to the boiler switching on the fused spur isolation switch The appli...

Page 38: ... Check the ignition gas pressure by setting dip switch 3 Fig 7 8 to the OFF position Compare thevalue on the gaugewith the value indicated in the sections 4 4 or 4 5 gas pres sures at the burner accordingly with the model of boiler installed If the ignition gas pressure is not set correctly see section 7 7 in this manual for the adjust ment procedure If ignition gas pressure is cor rect switch dip...

Page 39: ... activate the re ignition delay period of ap proximately 4 minutes When dipswitch number 4 is set to the OFF position there will be approxi mately 30 seconds re ignition delay period Whilst checking or adjusting the c h output and fault finding on the boiler it may be necessary to switch the re ignition delay mechanism dips witch 4 to the OFF position Refer to the diagrams shown in Fig 7 9 Fig 7 1...

Page 40: ...igures 7 11 Instructing the user Hand over this combined User Installation man ual and the Servicemanual tothe end user and ex plain how to use the unit in both c h and d h w modes Take the User step by step through the lighting in structions Show the User how to switch off the appliance quickly and indicate the position of the electric supply isolator Explain the proper use and adjustment of all ...

Page 41: ...er injectors correctly 6 Re assemble the burner the front panel of the combustion chamber and the lid of the sealed chamber 7 Extract the control panel as explained in the section 6 10 of this manual 8 Loosen the screws C and remove the service panel Fig 8 1 C Fig 8 1 9 set correctly the dip switch 2 to the correct position Fig 8 2 in accordance with the follo wing table Gas supply Position of dip...

Page 42: ...ion switch adjacent to the appliance and turn off the gas cock before carrying out any pro cedures whatsoever for cleaning mainten ance opening or dismantling boiler panels 9 2 Dismantling the external panels Front panel 1 Loosen the two screws A Fig 9 1 2 Lift and remove the panel A Fig 9 1 Side panels 3 Loosen the screws B Bring the bottom of the panels away from the boiler and lift them free in...

Page 43: ...rt the analyser probe aproximately 110 mm into the exhaust gas air intake sampling points Reference figures are given in the sections 4 4 or 4 5 of this manual Flue gas figures 9 6 Cleaning the primary heat exchanger 1 Take off the front of the case 2 Take off the removable front of the air tight chamber and thefront panelof thecombustion chamber If you notice dirt on the fins of the primary heat ...

Page 44: ...hen removing the airtight chamber cover it is not necessary to remove the screws lo cated at the top edge on either side 9 9 Checking the flue Have the integrity of the flue outlet pipe 45 on page 12 air intake pipe 46 on page 12 checked periodically the venturi device 42 on page 12 cleaned and the efficiency of the flue safety circuit checked at least once a year For details see the section Fan v...

Page 45: ...Maintenance 39 MAINTENANCE ...

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Page 48: ...8 17962 0913 8 4106 48A5 UK Biasi UK Ltd Newman Park Western Way Wednesbury WS10 7BJ Sales Tel No 0121 506 1340 Sales Fax No 0121 506 1360 Service Tel No 0121 506 1350 Service Fax No 0121 506 1370 www biasi co uk ...

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