BOILER SERVICE INSTRUCTIONS MANUAL
Contents
1. TAE TE A I UM 17562 0187 0 0406 49A4 USA Riva HEAT ONLY WALL HUNG GAS BOILER FOR CENTRAL HEATING SUPPLY Please Read Instructions Carefully Save for Future Reference WARNING If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or loss of life Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you can not reach your gas supplier call the fire department MANUAL Installation and service must be performed by a qualified installer service agency or the gas supplier Manufactured by Distributed By Biasi S p A Verona Italy Quincy Hydronic Technologies Inc 80 Rochester AVE Suite 12 Portsmouth NH 03801 Phone 603 334 6400 Fax 603 334 6401 un Z pa x un Z gt gt un x RIVA HEAT ONLY SERVICE MANUAL REV First Part Service Manual RIVA HEAT ONLY SERVICE MANUAL REV A 2 First Part The Technical Manual The aim of this manual is to provide technical assistance operators with all the information necessary to2. 5 General Access and Emptying the Hydraulic Circuits Nomenclature Body Panels Control Panel Access to the Sealed Chamber Emptying the Primary Circuit O Primary Heat Exchanger Function Removal Cleaning O Pump Function Checks Removal O Control p c b 11 62 Function Selection and Adjustment Devices Checking the Temperature Operation Lights Dip switch Selectors Ignition Gas Pressure Adjustment Max C h Power Regulation Anti frost System Hydraulic Parts Checking System Checks Removal of the Control p c b Thermal Control Fan and Air Pressure Device 11 61 Function Checks Removal Full Sequence Ignition Device S4567A 1019 Function Checks Removal Ignition and Control Sequence O Modulating Gas Valve Function Nomenclature RIVA HEAT ONLY SERVICE MANUAL REV A eh RS wh Nadana PE EY RETA gt 4 Adjustment Checks Removal of the Gas Valve O Primary Circuit Flow Switch Function Checks Removal Expansion Vessel and Temperature Pressure Gauge Function Checks Removal of the C h Expansion Vessel Removal of the Temperature Pressure Gauge O Temperature Probe NTC Function Checks Removal Fan Venturi Device and Air Pressure Switch Function Checks Removal of the Fan Inspection and Removal of the Venturi Device Removal of the Air Pressure Swit
3. Figure 5 8 Loosen the connector H RIVA HEAT ONLY SERVICE MANUAL REV A 3 2 Third Part edition 0106 Control p c b 11 62 Control p c b 11 62 Function Selection and Adjustment Devices Checking the Temperature Operation Lights Dip switch Selector Function Inlet Information On the Electronic control p c b Function control C h temperature adjustment Function dip switches Max c h power adjustment Ignition gas pressure adjustment Boiler reset button control panel fascia From other boiler devices C h temperature probe NTC Primary circuit flow switch Room thermostat if fitted Flame presence signal from the full sequence ignition device i Outlet command Pump Full sequence ignition device Modulation operator Appliance operation lights Lock out signal lamp control panel fascia RIVA HEAT ONLY SERVICE MANUAL REV A 6 Ignition Gas Pressure Adjustment 7 Power Regulation 8 Anti frost System 9 Hydraulic Parts Checking System 10 Checks 11 Removal of the Control p c b 12 Thermal Control The fundamental function of the Control p c b is that of controlling the boiler in relation to the external needs i e heating the dwelling and operating in order to keep the temperature of the hydraulic circuits constant This is obviously possible within the useful power and maximum working temperature limits foreseen General
4. 4 Remove the probe holder spring C freeing the safety probe D Figure 3 13 1 Third Part edition 0106 Figure 3 5 Re assemble the parts carrying out the removal operation in reverse order 6 Apply an adequate quantity of heat conducting compound between the pipe and the thermostat RIVA HEAT ONLY SERVICE MANUAL REV A Safety Thermostat 13 2 Third Part Electric Resistances 1 Pump Resistance 2 Gas Valve Resistance 3 Temperature Probe NTC Resistance 4 Fan Resistance Resume of the electric resistances in of the boiler parts Pump Resistance Figure 1 Pump Resistance 51 7 Gas Valve Resistance Figure 2 On off operator approx 1 122 O at ambient temperature Figure 5 RIVA HEAT ONLY SERVICE MANUAL REV edition 0106 Electric Resistances Temperature Probe NTC Resistance 500 77 86 95 104 113 122 131 140 149 158 167 176 185 194 203 212 Figure 3 EB Fan Resistance Figure 4 14 1 Third Part edition 0106 Short Spare Parts List Key Description Quantity Manufactorer Part No Manufactorer s Reference 1 Burner 1 811203 103 Polidoro 2 Injectors for Natural Gas 14 BI1203 502 Polidoro Injectors for L P G 14 BI1203 503 Polidoro 3 Modulation Gas Valve 1 BI1203 104 Honeywell 4 C h Expansion Vessel 1 1182 105 Zi
5. Control Panel Warning Isolate the boiler from the mains electricity supply before removing any covering or component To gain access to the parts located inside the control panel proceed as follows 1 Remove the front panel of the case 2 Loosen the screws and B and C Figure 3 3 Move the lower part of the side panels as indicated in Figure 4 and pull the control panel When completely pulled out the panel can rotate 45 downwards to facilitate the service operations on the internal parts Figure 5 4 Remove the screws D and remove the service panel Figure 5 5 To gain access to the electronic control p c b and the fan and air pressure device remove the screws E and remove the control panel lid Figure 5 EH Access to the Sealed Chamber To gain access to the parts contained in the sealed chamber it is necessary to remove the lid of the sealed chamber For this purpose remove the front and side panels of the case remove the screws F as indicated in Figure 6 and remove the lid RIVA HEAT ONLY SERVICE MANUAL REV A General Access and Emptying Hydraulic Circuits Figure 6 Emptying the Primary Circuit 1 Close the pressure reducing automatic fill valve 2 Open the c h drain cock G Figure 7 3 Empty the C h System 4 Close the c h drain cock G 5 Open the pressure reducing automatic fill valve Figure 7 1
6. Remove the front panel of the combustion chamber Figure 9 1 5 Loosen the screws A and remove the burner 7 Figure 9 1 6 Carry out the conversion for the type of gas replacing the burner injectors correctly 7 Reassemble the burner the front panel of the combustion chamber and the lid of the sealed chamber 8 Extract the control panel 9 Loosen the screws D and remove the service panel Figure 9 2 Figure 9 2 10 Set correctly the dip switch 2 to the correct position Figure 9 3 in accordance with the following table Gas supply Position of the switch 2 Natural gas On L P G Off RIVA HEAT ONLY SERVICE MANUAL REVA Maintenance Characteristic Verification Natural gas Figure 9 5 11 Close the service panel 12 Turn on the boiler 13 Calibrate the gas valve according to the instructions given in the section 7 of the third part of this manual 14 Set the correct gas pressure for central heating output required 15 Stick on the inside of the left hand side panel adjacent to the data badge the self adhesive label included with the conversion kit indicating the type of gas and the gas pressures to which the appliance has been set 16 Reassemble the front and side panels of the case M130 30CR 7 Second Part M130 30CR Maintenance Characteristic Verification RIVA HEAT ONLY SERVICE MANUAL REV A M130 30CR 8
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8. 2 Third Part edition 0106 Primary Heat Exchanger Primary Heat Excanger EB Removal 1 Remove the case panels 2 Empty the primary circuit 3 Remove the sealed chamber lid 4 Remove the front panel B of the combustion chamber by unscrewing the screws C Figure 1 Function 2 Removal 3 Cleaning El Function 3 5 Remove the screw D and the deflector E The primary heat exchanger A in Figure 1 has 6 Remove the clips F Figure 3 the function of transferring heat produced from ANE lt gt I combustion of the gas to the water circulating in 4 it Figure 3 7 Loosen the connection G rotate to the left and then move downwards the pipe H freeing it from the connection of the primary heat exchanger Figure 4 Figure 1 The hydraulic circuit is composed of 8 elliptical pipes connected in parallel Figure 2 H Figure 2 x Figure 4 RIVA HEAT ONLY SERVICE MANUAL REV A 2 1 Third Part edition 0106 8 Completely unscrew the connection J and rotate the pipe downwards freeing it from the heat exchanger connection Figure 4 9 Remove the heat exchanger by sliding it forwards 10 Reassemble the boiler carrying out the removal operations in reverse order Fit the clip F with the arrow pointing upwards as illustrated in Figure 3 Cleaning If there are deposits of soot or dir
9. 25 second circulator NO off and faulty primary cir cuit see LED table Primary circuit flow switch OK YES Is primary circuit temperature higher than that selected YES NO Operates motorised valve Supplies the ignition device RIVA HEAT ONLY SERVICE MANUAL REV A 4 6 Third Part edition 0106 Fan and Air Pressure Device 11 61 1 Function 2 Checks 3 Removal EB Function The Fan and air pressure device A Figure 1 used on the boiler carries out the following fundamental functions O supplies the fan and checks its functioning by means of the signal coming from the air pressure switch O supplies the air pressure switch and makes it commutate O supplies the safety thermostat The Fan and air pressure device is supplied by the electronic control p c b see Second part of this manual chapter 6 Circuit Voltages The Fan and air pressure device also has a safety function and any wrong interventions or tamperings could cause the boiler to function under hazardous operating conditions The Fan and air pressure device can lock the functioning of the boiler lock state and stop its functioning up to the resetting intervention The lock is signalled by the lighting of the lock out signal lamp and the device can be reset only by using the boiler reset button and the function knob placed on the control panel Some components which are connected to the device can activate the lock state Th
10. 4 2 Third Part Normally operating boiler the previous table for details Gh operation Frog protect operation Faulty ch temperature probe NTC Faulty primary circuit no water or absence of flow Lack of burner ignition no ignition signal from he full seqence ignition device e gnition gas pressure adjustment Minimum gas pressure adjustment Lack of power supply or fauly electronic 67658 PP d e o Faulty Electronic control gnition p c m um 1 Xx p s Flashing lamp alone Flashing lamp or simultaneously alternate with with an other lamp another lamp Lamp Lamp OFF ON These conditions are normal only for a short time when the power supply is applied to the boiler If permanent they indicate a faulty p c b Figure 4 Dip switch Selectors The function selectors G Figure 1 are microswitches with which it is possible to select the various boiler control function modes In Figure 5 the selectors are illustrated in the configuration in which the boiler is set in the factory natural gas boiler Minimum gas pressure adjustment Gas conversion Ignition gas pressure adjustment Reignition frequency 1 Figure 5 RIVA HEAT ONLY SERVICE MANUAL REV OFF 0 edition 0106 Control p c b 11 62 O Selector 1 This forces the boiler to operate at the minimum gas pressure in order to allow the adjus
11. Figure 7 and use the adjustment device I ACC Adjust the gas pressure at the injectors to the value indicated in the tables of the User Installation manual Technical information section Gas pressures at the burner table By rotating the device clockwise the pressure increases Check the regular ignition of the burner by turning the boiler on and off repeatedly After the adjustment operations bring the selector 3 back to the normal position ON in Figure 7 Max C h Power Regulation By using the device Figure 1 marked RISC it is possible to limit the maximum useful output delivered in c h function By rotating the device clockwise the pressure increases EN Anti frost System With the boiler turned on the anti frost control is always active which briefly starts the boiler until shutdown at 35 C primary circuit so that the temperature of the c h circuit does not drop below 5 C in Figure 1 If there is no gas the pump runs continuously to keep the water from freezing This function is also active in standby mode Kl Hydraulic Parts Checking System With the boiler operating both in winter function and in summer function the hydraulic parts checking system is always active RIVA HEAT ONLY SERVICE MANUAL REV A edition 0106 Control p c b 11 62 This system makes it possible to maintain the efficiency of the hydraulic parts i e pump by activating them in case of lo
12. boiler and connect a differential pressure gauge Figure 4 2 Switch on the boiler Figure 4 3 Compare the value on the gauge with the following minimum value 0 64 inwc Removal of the Fan 1 Remove all the case panels and the sealed chamber lid 2 Disconnect the connectors D and E Figure 2 3 Disconnect the pipe F which connect the venturi device to the pressure test point Figure 2 Figure 5 4 Unscrew the screws G Figure 5 5 Remove the fan by sliding it to the right 6 Re assemble the fan carrying out the removal operations in reverse sequence Warning Re assembling the fan ensure that the hooks around the inlet port of the fan hung correctly on the flue hood Warning To correctly connect the venturi device to the Air pressure switch refer to Figure 6 RIVA HEAT ONLY SERVICE MANUAL REV A Fan Venturi Device and Air Pressure Switch Figure 6 ES Inspection and Removal of the Venturi Device 1 Remove all the case panels and the sealed chamber lid 2 Remove the fan 3 Remove the venturi device by unscrewing the screw H Figure 7 Figure 7 4 Inspect the venturi device B and the connection pipe Ensure they are clean 5 Re assemble the parts in reverse order of removal Removal of the Air Pressure Switch 1 Remove all the case panels and the sealed chamber lid 2 Disconnect the wires from the Air pressure switch 3 Remove the pipe from the Air pressur
13. valve inlet pressure test point H Gas valve outlet pressure test point Modulation operator Adjustment Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove the front panel of the case 2 Open the gas valve inlet pressure test point G in Figure 2 at the valve input connect a suitable pressure gauge and check the gas pressure of the supply network 3 Remove the gauge and close the pressure test point G 4 Open the gas valve outlet pressure test point H in Figure 2 and connect the gauge H 2 78 E Figure 2 Figure 3 5 Remove the protection L Figure 3 from the mechanical pressure adjustment components levering with a flat screwdriver in the slots M 6 Start the boiler at its maximum power Ensure that the boiler is not range rated 7 Rotate the maximum gas pressure adjustment C in Figure 2 until you obtain the required pressure by rotating clockwise the pressure increases 8 Turn the boiler off and disconnect one of the two connectors D in Figure 2 7 1 Third Part 9 Start the boiler and rotate the minimum gas pressure adjustment B in Figure 2 until you obtain the required pressure by rotating clockwise the pressure increases 10 Turn the boiler off and re connect the wire to the modulating operator 11 Start the boiler and check again the maximum gas pressure setting 12 Turn the boiler o
14. ONVERSION a aai a E M130 30CR 7 RIVA HEAT ONLY SERVICE MANUAL REV Second Part M130 30CR Maintenance Characteristic Verification RIVA HEAT ONLY SERVICE MANUAL REV A Second Part M130 30CR EB Overall View Air pressure switch test points Air pressure Fan switch Primary heat exchanger Burner Combustion Ignition chamber electrodes Flame detec sd ting electrode D Automatic air Gas valve outlet pressure test point Modulation T L gas valve De Gas valve inlet Pump pressure test point C h temp AS probe NTC purger valve Modulation operator Pump vent plug Safety v thermostat e E Ld Control panel y Primary circuit flow switch 1 EN Hydraulic Diagram Maintenance Characteristic Verification C h PRV Discharge Pipe fig 2 RIVA HEAT ONLY SERVICE MANUAL REV A M130 30CR 1 Second Part M130 30CR Maintenance Characteristic Verification Electrical Diagram Electric supply Fan Safety Air Pressure Ignition Flame Detection terminal Thermostat Switch Electrodes Electrode block External controls terminal NO Primary Circuit C h temperature Pump Gas Flow Switch probe NTC Valve bn brown bu blue bk black wh w
15. Starts ignition sparks Opens gas valve Ignition time starts Closes gas valve Stops ignition sparks XE Memorizes shutdown Shutdown indicator light on Stops ignition sparks Gas valve open Ignition time finished RIVA HEAT ONLY SERVICE MANUAL REV 6 2 Third Part Modulating Gas Valve 1 Function 2 Nomenclature 3 Adjustment 4 Checks 5 Removal of the Gas Valve EB Function The Modulating gas valve A in Figure 1 controls the gas inflow to the boiler burner 7 a 115 Figure 1 By means of an electric command given to the on off operators the passage of the gas through the Modulating gas valve can be opened or closed By means of an electric command given to the modulation operator the pressure can be varied and therefore the gas flow rate to the burner modulation The modulation operator has mechanical components which allow the adjustment of the minimum and maximum pressure exiting the valve EB Nomenclature RIVA HEAT ONLY SERVICE MANUAL REV edition 0106 Modulating Gas Valve B Minimum gas pressure adjustment C Maximum gas pressure adjustment D Modulation operator s electric connectors E On off operators electric connector F On off operators G Gas
16. Y SERVICE MANUAL REV A 9 2 Third Part Temperature Probe NTC 1 Function 2 Checks 3 Removal EB Function The Temperature probe has the function of converting the temperature of the water in the hydraulic circuit where it is installed into an electrical signal resistance The relation between temperature and electrical resistance is stated in Figure 1 GUT ae i80 E LA um LI 1 mH _ mH EN mH mH 1 mm mH mH mm mH mH LI TS mH m a oa E ALT L PLI ioo er BB 77 86 95104113122 131 140148 158 167 176 185 194 203 212 Figure 1 There is one Temperature probe on the output of the primary heat exchanger A in Figure 2 EN Checks A Temperature resistance relationship Warning Isolate the boiler from the mains electricity supply before removing any covering or component Disconnect the cable from the Temperature probe Measure the temperature of the brass group where the Temperature probe is located and check the electrical resistance according to the graph in Figure 1 RIVA HEAT ONLY SERVICE MANUAL REV A edition 0106 Temperature Probe NTC If the temperature that the NTC give to the control p c b is more than 100 C the NTC is probably in short circu
17. aid out with consecutive numbers fig 3 a fig 3 Part two is arranged on two levels fig 4 The first gives the acronym of the family to which the technical sheet belongs the number that follows indicates technical sheet order sequence inside each family first level second level M130 30CR 1 30CR 3 5 pe zm fig 4 Part three is also arranged on two levels fig 5j the first is a number assigned to each component the second indicates technical First Part sheet order sequence Correspondence between component and number is given in the index at the beginning of part three a 1 3 2 1 fig 5 EB Updating The evolution of Biasi products entails updating the technical assistance personnel and relative documentation The updated documentation which will be sent to the Assistance Service Centres whether in the shape of a circular or technical sheets to be added to the manual or to replace others must be properly inserted All technical service personnel must be informed immediately of their contents EB Models All models of products manufactured are identified with a name This name from here referred to as model is determined by the unit construction characteristics fig 6 sai Sealed Chamber Max useful power in c h 30 30 00 kW 25 800 kcal h Boiler series fig 6 RIVA HEAT ONLY SERVICE MANUAL REV A Service Manual The information contained in t
18. c7 gjexpeuq 21 ON jo ped plug enue eui jo uogas M130 30CR 4 RIVA HEAT ONLY SERVICE MANUAL REV A Second Part M130 30CR Maintenance Characteristic Verification Kall Circuit Voltages Electrical voltages with burner on Primary Circuit Flow Switch 120 Supply Network Gas Valve 24 Safety Thermostat Air pressure Switch REN mS uet X at gt 120 Ogg Control p c b 120 120 Pump Fan and Air Pressure Device 120 1 Control p c b RIVA HEAT ONLY SERVICE MANUAL REV A Fan and Air Pressure Device M130 30CR 5 Second Part M130 30CR Operation Lights The Electronic control p c b is provided with three lamps LED indicators that give optical information during the operation of the boiler The green lamp on the left gives information whether the boiler is in stand by mode or during the normal operation of the boiler The following table gives the relationship between the lamp indication and its meaning i 3e A short pulse every 4 seconds db d Boiler in stan
19. ch Ignition and Detection Electrodes Burner and Injectors Function Checks Removal Safety Thermostat Function Checks Removal O Electric Resistances Pump Resistance Gas Valve Resistance Temperature Probe NTC Resistance Fan Resistance O Short Spare Parts List RIVA HEAT ONLY SERVICE MANUAL REV Third Part edition 0106 General Access and Emptying Hydraulic Circuits Nomenclature Body Panels Control Panel Access to the Sealed Chamber Emptying the Primary Circuit Figure 1 1 Right Side Panel 2 Front Panel 3 Control Panel Lid 4 Control Panel Cover 5 Left Side Panel EN Body Panels Warning Isolate the boiler from the mains electricity supply before removing any covering or component For the most part of the check and maintenance operations it is necessary to remove one or more panels of the case RIVA HEAT ONLY SERVICE MANUAL REV General Access and Emptying Hydraulic Circuits The side panels can be removed only after the removal of the front panel To remove the front panel remove screws A Figure 2 lift the panel and remove it Figure 2 To remove the side panels remove the screws B Figure 3 and loosen the screws C Figure 3 bring the base of the panels away from the boiler Figure 4 and lift them freeing them from the top hooks Figure 4 1 1 Third Part edition 0106
20. cks A Check of the fan Warning Isolate the boiler from the mains electricity supply before removing any covering or component RIVA HEAT ONLY SERVICE MANUAL REV A Fan Venturi Device and Air Pressure Switch 1 Remove all the case panels and the sealed chamber lid 2 Disconnect the connectors D Figure 2 and measure the electrical resistance of the motor that has to be about 7 2 Figure 2 B Check of the Air pressure switch operation Warning Isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove all the case panels and the sealed chamber lid 2 Disconnect the wires and check the electrical resistance between the connections of the Air pressure switch Refer to the Figure 3 in accordance with the type of air pressure switch used COM connection N C NS connection Figure 3 Between COM and N O the contact must be open Between COM and N C the contact must be closed electrical resistance zero 3 Connect the black COM and the brown wire N C 4 Run the boiler the Fan must run and check the electric resistance between COM and N O Between COM and the contact must be closed electrical resistance zero 11 1 Third Part edition 0106 C Check of the venturi device This test must be carried out with the sealed chamber closed 1 Remove the caps of the pressure test points located on the top of the
21. d by condition function control in c position Antifreeze system active Boiler condition function control in position 1 second ON 1 second OFF xx O Normally operating boiler M see the previous table for details qe ati XX operation FS FM EB Start up Checks 1 Connection to the gas supply system Check that current regulations have been complied with and that safe running and use are guaranteed Check that there are no leaks 2 Gas supply pressure Check gas supply pressure at valve input when the boiler is off and when it is running at full power Carry out the same check if there are any other user points on 3 Connection to the electrical system Check for proper connection to the power supply and to external control devices Check that the unit is connected to the electrical protection system earth 4 Check the C h circuit Check that the circuit is properly filled at a suitable pressure and that there are no leaks Check it is correctly bled of air 5 Combustion by product expulsion system RIVA HEAT ONLY SERVICE MANUAL REV Maintenance Characteristic Verification Frost protect operation Faulty oh temperature probe NTC Faulty primary circuit no water or absence of flow Lack of burner ignition no ignition agnal from he full seqence ignition device a gnition gas pressure adjustment Minimum gas pressure adjustment Lack of power suppl
22. e causes of a lock state could be O The intervention of the safety thermostat overheat of the primary circuit O The air pressure switch can temporarily stop the ignition of the burner but allow its ignition when the cause of the intervention has stopped Checks A Fan and Air Press Switch functioning device With the boiler operating and the burner on open the negative pressure test point of the Venturi device RIVA HEAT ONLY SERVICE MANUAL REV A Fan and Air Pressure Device 11 61 At the moment of opening the burner must turn off B Checking Voltages Refer to Second part of manual chapter 6 to determine the connector pins where to check the supply voltages Removal Figure 1 1 Remove the front panel of the case and lower the control panel 2 Open the control panel as explained in the first section of the third part General access and emptying hydraulic circuits 3 Disconnect the connectors B C D E by delicately flexing the hook present on one side of each socket 4 Loosen the screws F and remove the device 5 Re assemble the device following the removal procedures in the reverse order 5 1 Third Part edition 0106 Fan and Air Pressure Device 11 61 RIVA HEAT ONLY SERVICE MANUAL REV A 5 2 Third Part edition 0106 Full Sequence Ignition Device 84567A 1019 1 Function 2 Checks 3 Removal 4 Ignition and Control Sequence EB Function The Full sequence i
23. e switch 4 Unscrew the screws which hold the Air pressure switch to the frame 5 Assemble the Air pressure switch carrying out the removal operations in reverse sequence Warning To correctly connect the Air pressure switch refer to Figure 6 and Figure 3 for the correct wiring Third Part edition 0106 Ignition and Detection Electrodes Burner and Injectors Ignition and Detection Electrodes Burner and Injectors 1 Function 2 Checks 3 Removal EB Function Three electrodes are fitted on the burner Two of them are the ignition electrodes and are fitted near the front part of the burner The ignition sparks take place between their metallic edges over the central ramp of the burner during the ignition sequence The third electrode is the detection electrode and it detects the presence of the flame Figure 1 EN Checks A Check the position of the electrode edges Warning Isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove all the case panels the sealed chamber lid and the combustion chamber lid 2 Check for the correct distance between the metallic edges of the ignition electrodes see Figure 2 RIVA HEAT ONLY SERVICE MANUAL REV A Ignition Figure 2 3 Check the integrity of the detection electrode and ensure that its metallic edge is correctly placed over the ramp of the burner B Check the connection wires Warning Isolate the bo
24. erature the safety thermostat opens the electric circuit that supplies the on off operators of the gas valve Consequently the full sequence ignition device attempts to light the burner and at the end locks the boiler and lights the eget signal lamp Figure 1 EJ Checks A Overheat temperature value 1 Set the temp control knob to its maximum position and run the boiler RIVA HEAT ONLY SERVICE MANUAL REV A edition 0106 Safety Thermostat 2 Allow the boiler to reach its maximum operating temperature monitor the temperature gauge on the instrument panel The boiler should maintain a temperature below that of the safety thermostat and no overheat intervention should occur Warning Isolate the boiler from the mains electricity supply before removing any covering or component B Electrical function 1 Remove all the case panels and the lid of the sealed chamber 2 Disconnect the safety thermostat and check its electrical function Normally no intervention the contact must be closed electrical resistance zero Q Removal Warning Isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove all the case panels and the lid of the sealed chamber 2 Unscrew the three screws B Figure 2 Figure 2 3 Disconnect the three connectors of the safety thermostat
25. facilitate maintenance of Biasi products To use this manual in the best possible way and to find the information in it quickly it is necessary to understand how it is laid out by reading the following carefully EB Manual layout The manual is divided into three different parts fig 1 The first part contains the general instructions on how to use and consult the manual the nomenclature of the models illustrated in this manual and the grouping criteria for each family The second part contains booklets with technical data hydraulic and wiring diagrams troubleshooting instructions and start up checks grouped into product families The third part contains the technical data sheets relative to each component its basic characteristics checking its condition and replacing and or servicing First Part Second Part Third Part fig 1 RIVA HEAT ONLY SERVICE MANUAL REV A Service Manual Parts two and three are preceded by an index that gives the contents and their order of arrangement Topic numbering edition The topic dealt with on each card is also shown in the top right corner of each page the part in the top left corner The pages are numbered in the bottom corner fig 2 Technical sheet edition date month and year is given between the Part and the Argument on top of the page PTR es E of Pages fig 2 Part one is l
26. ff and disconnect the gauge Important after the gas pressure checks and any adjustment operations all of the test points must be sealed EB Checks A Check the modulation operator coil 1 Remove the front panel of the case 2 Disconnect the connectors D Figure 2 from the modulating operator and measure the electrical resistance of the coil Its electrical resistance value must be approx 114 B Check the on off operators coils 1 Remove the front panel of the case 2 Disconnect the Ignition device N Figure 4 3 Measure the electrical resistance between the connector pins of the on off operators as illustrated in Figure 5 Figure 4 On off operator approx 1 122 O at ambient temperature Figure 5 RIVA HEAT ONLY SERVICE MANUAL REV A edition 0106 Modulating Gas Valve Removal of the Gas Valve 1 Remove the front panel of the case 2 Disconnect the connector D Figure 2 and remove the full sequence ignition device N Figure 4 3 Turn off the gas supply and remove the gas supply pipe O Figure 6 Figure 6 4 Loosen the connections Q Figure 2 and 7 and R Figure 7 Figure 7 5 Remove the gas pipe above the gas valve 6 Loosen the screws P Figure 6 7 Remove the gas valve 8 Reassemble the gas valve carrying out the removal operations in reverse order After any service operation on the components of the gas circuit check all the connections for gas leaks War
27. gnition device A Figure 1 used on the boiler carries out the following fundamental functions _ tititi Figure 1 O does a sequence of operations ignition cycle which lead to the ignition of the gas at the burner O checks the presence of the flame during the entire period in which it is activated The Full sequence ignition device is supplied by the fan and air pressure device when the ignition of the burner is requested see Second part of this manual chapter 6 Circuit Voltages The Full sequence ignition device has a safety function and any incorrect interventions or tampering can result in conditions of dangerous functioning of the boiler The Full sequence ignition device can lock the functioning of the boiler lock state and stop its functioning up to the resetting intervention The lock is signalled by the lighting of the lock out signal lamp and the device can be reset only by using the boiler reset button and the function knob placed on the control panel The ignition device has some components connected to it which can cause triggering of the shutdown condition these components are RIVA HEAT ONLY SERVICE MANUAL REV Full Sequence Ignition Device 84567A 1019 the modulating gas valve the flame detection electrode The causes of a lock state could be O A fault on gas supply O Faulty ignition faulty ignition electrodes their wiring or connection O Faulty flame detection faulty detec
28. his manual is applicable to the following models M130 30CR EJ Serial number Each unit has its own serial number the meaning of which is given in fig 7 N210250205 Construction month and year Progressive number Gas Type N Natural fig 7 Series The boilers are grouped into families in part two of this manual each group including models with identical construction features and hence with identical maintenance Within each family the models differ only in their nominal thermal capacity or other characteristics that do not call for different maintenance Series Models eec M130 30CR Second Part M130 30CR Maintenance Characteristic Verification Summary Page OVERALL VIEW erdt ro cide e Suite e NEN Epi VEINS M130 30CR 1 HYDRAULIC enne M130 30CR 1 ELECTRICAL 1727 P sean Re Re RE UAR RENE XRENERSSRERERREF ES xe M130 30CR 2 GAS ADJUSTMENT M130 30CR 3 pena aoro usen ara ERR ERIS Rt E KEY Ra ey M130 30CR 4 CIRCUIT VOLTAGE S ERAN LAKE c TEE M130 30CR 5 OPERATION tate vanes PONE NEN IRE NU M130 30CR 6 START UP CHECKS Taba eee E eR sass M130 30CR 6 GAS C
29. hite rd red 9y grey ye yellow gt directly connected to the electronic ignition board gnye green yellow fig 3 RIVA HEAT ONLY SERVICE MANUAL REV A M130 30CR 2 Second Part M130 30CR Maintenance Characteristic Verification EN Gas Adjustment Data Maximum gas pressure at the injectors Natural G20 inwc 5 3 Propane G31 inwc 9 0 Minimum gas pressure at the injectors Natural G20 inwc 0 8 Propane G31 inwc 1 4 Ignition pressure Natural G20 inwc 2 4 Propane G31 inwc 5 2 Maximum gas rate Natural G20 ft h 121 1 Propane G31 Ib h 5 55 Minimum gas rate Natural G20 ft h 48 7 Propane G31 Ib h 2 23 Injectors Natural G20 14 130 631 14 89 KW 10 8 12 0 14 0 17 0 20 0 23 0 26 0 29 5 Useful output Koah 9288 10320 12040 14620 17200 19780 22360 25370 Pa 220 250 330 470 640 830 1050 1330 Natural Propane inwc 1 45 1 69 2 25 3 21 4 34 5 62 7 06 8 95 lbh 22 24 2 8 3 3 3 9 4 4 4 9 5 5 RIVA HEAT ONLY SERVICE MANUAL REV M130 30CR 3 M130 30CR Maintenance Characteristic Verification Second Part Fault Finding Guns s d Je Le au st Jo ssnea erqiesodiui aqp Buyse jo Buuu Baq eui Woy pe sien uin 1 ussop ut ou ansad 1e PUB LUE aq si une ai jo e
30. iler from the mains electricity supply before removing any covering or component 1 Remove all the case panels the sealed chamber lid and the combustion chamber lid 2 Check for the integrity of the insulation of wires which connect the electrodes to the ignition device Removal 1 Remove all the case panels the sealed chamber lid and the combustion chamber lid 2 Disconnect the electrode wires from the full sequence ignition device 3 Remove the burner by unscrewing the four screws placed at the right and left sides of the burner 4 Remove the deflector by unscrewing the screw B Figure 3 Figure 3 5 Unscrew the screws D Figure 4 which hold the electrodes to the burner 12 1 Third Part edition 0106 Ignition and Detection Electrodes Burner and Injectors Figure 4 6 Extract the electrodes from the burner 7 Re assemble the parts carrying out the removal operation in reverse order Note The metallic edge of the detection electrode is longer than the one of the ignition electrodes RIVA HEAT ONLY SERVICE MANUAL REV A 12 2 Third Part Safety Thermostat 1 Function 2 Checks 3 Removal EB Function The safety thermostat A in Figure 1 is a device that senses the temperature of the primary circuit water which flows in the outlet pipe of the primary heat exchanger If the temperature control system of the boiler fails and the temperature of the primary circuit reaches a dangerous temp
31. it If the temperature that the NTC give to the control p c b is less than 0 C the NTC is probably disconnected or nie TRIS Figure 2 Removal Warning Isolate the boiler from the mains electricity supply before removing any covering or component 1 To remove the Temperature probe remove the front panel of the case 2 Empty the primary circuit of the boiler 3 Remove the electric connector of the NTC probe B and unscrew it Figure 3 Figure 3 4 Reassemble the Temperature probe carrying out the removal operations in reverse order 10 1 Third Part edition 0106 Temperature Probe NTC RIVA HEAT ONLY SERVICE MANUAL REV A 10 2 Third Part edition 0106 Fan Venturi Device and Air Pressure Switch Function Checks Removal of the Fan Inspection and Removal of the Venturi Device Removal of the Air Pressure Switch EB Function The function of the Fan A Figure 1 is to force the products of combustion to the outside air via the flue system The Fan is supplied by the Fan and air pressure device at the beginning of the ignition cycle Its correct functioning is controlled by means of a system incorporating a built in venturi device B and an Air pressure switch C Figure 1 B A ic Figure 1 EN Che
32. lectric resistance between the contacts C and N O of the switch 1 Remove the switch as explained in next section 2 Measure the electrical resistance between the tabs marked C and N O Figure 3 The contact must be normally open 3 Operate the switch by hand and verify that the contact is Tor X Figure 3 Removal Warning Isolate the boiler from the mains electricity supply before removing any covering or component A Removal of the switch 1 Remove the front panel of the case 2 Remove the fork C Figure 4 3 Open the box D Figure 4 and disconnect the switch 8 1 Third Part edition 0106 4 Re assemble the parts in reverse order of removal Refer to Figure 3 for the correct wiring connectors on the switch Figure 4 B Removal of the membrane 1 Remove the front and side panels of the case and empty the primary circuit 2 Remove the fork C that holds the micro switch housing D Figure 4 3 Unscrew the four screws E see Figure 5 open the hydraulic operator and remove the membrane F RIVA HEAT ONLY SERVICE MANUAL REV A Primary Circuit Flow Switch Figure 5 4 Reassemble the parts in reverse order of removal When assembling the membrane ensure that its concave side faces towards the actuator plate G and the reference indicated aligns with the seat H see Figure 5 8 2 Third Part edition 0106 Expansion Vessel and Temperature P
33. lmet 5 Heat Exchanger 1 1242 108 Mgm 6 Fan 1 BI1386 118 Fime 7 Air Pressure Switch 1 811386 119 Yamatake a 1 BI1366 109 9 Chamber Rear 4 11326 108 10 E A Chamber Left 4 BI1326 100 Combustion Chamber 11 Right Panel 1 BI1326 100 12 Control p c b 1 1555 107 Ceza 13 Fan and Air Pressure Dev 1 1555 108 Ceza 14 Full Sequence Ignition Dev 1 BI1555 109 Honeywell 15 C h Pressure Relief Valve 1 811191 121 Conbraco Industries 16 Safety Thermostat 1 1242 109 Imit 17 Primary Circuit Flow Switch 1 1011 505 18 Pump 1 BI1242 110 Wilo 19 Fuse 4 0A 250V 5x20F 1 811555 110 ag 1 1811001 117 I T S Probe 21 Ignition Electrode left 1 BI1203 105 Network Components 22 Ignition Electrode right 1 BI1203 106 Network Components 23 Detection Electrode 1 11203 107 Network Components 24 Pressure 1 BI1555 100 Wika Italiana RIVA HEAT ONLY SERVICE MANUAL REVA 15 1 Short Spare Parts List edition 0106 Third Part 15 2 RIVA HEAT ONLY SERVICE MANUAL REV A
34. lug from the pump Start the boiler and with a screwdriver turn the rotor in the direction of the arrow If there is a defect in starting the rotor will begin to turn normally only starting it manually D Check that the impeller is integral with the rotor With the boiler off remove the front and right hand side case panels lower the control panel and empty the primary circuit Remove the pump head by undoing the screws which hold it to the pump body and check that the impeller is firmly joined to the rotor Removal 1 Remove the front and the side panels of the boiler 2 Empty the primary circuit of the boiler 3 Extract and lower the control panel 4 Unscrew the screw B and remove the black case C Figure 3 3 1 Third Part edition 0106 Pump 9 Disconnect the connectors and pull out the power supply cable from the pump 10 Loosen the connection J and remove the pipe Figure 6 11 Unscrew the two screws L that hold the pump on the frame Figure 6 12 Remove the pump towards the front of the boiler 13 Reassemble the pump carrying out the Figure 4 removal operations in reverse order When 5 Loosen the connections D Figure 3 reassembling the pump check the correct 6 Remove the forks F and G Figure 4 location of the O ring gasket in the inlet port 7 Remove the locking plate E right Figure 4 of the pump that seals the connection 7 between the pump and the brass group
35. ly the Control p c b receives inlet information coming from the boiler the sensors or from the outside knob room thermostat etc processes it and consequently acts with outlet commands on other components of the boiler Selection and Adjustment Devices On the Control p c b several selection adjustment and protection devices are located Figure 1 Some of these devices are directly accessible by the user function control temperature adjustment potentiometers etc others are accessible by removing the service panel or the control panel lid Figure 1 A J3 connector B J2 connector C Lock out signal lamp 4 1 Third Part D Boiler reset button E Function control C h temp adjustment F Appliance operation lights G Dip switch selectors H Setting jumpers Ignition gas pressure adjustment ACC J J1 connector K Fuse 4 0A Checking the Temperature The control p c b makes it possible to adjust the c h water flow temperature The temperature of the water is converted into an electric signal by means of temperature probes The user setting the desired temperature with the control panel knob operates the variable element E in Figure 1 of the control p c b If the power requested is lower than 40 of the maximum power output then control is achieved by switching ON the burner at minimum power then switching OFF ON OFF function If the power requested is higher then the burner i
36. ng periods of unusing It is activated when the boiler is inactive for more than 24 hours A It turns on the pump for 1 minute Checks A Check that the fuse is complete If the control p c b does not supply any device pump etc check that the fuse K Figure 1 is complete If the fuse has blown replace it with one that has the same characteristics after having identified the reason for failure B Check the setting jumpers position Two setting jumpers must be fitted on the Control p c b as shown in Figure 9 123456789 Figure 9 The numbers refer to the marking printed on the circuit board Removal of the Control p c b Warning Isolate the boiler from the mains electricity supply before removing any covering or component 1 Gain access to the parts located inside the control panel as explained on page 1 2 of the third part of this manual 2 Remove all the wiring connected to the Control p c b To disconnect the connectors J1 J2 and J3 A B and J in Figure 1 delicately flex the hook present on one side of each socket 3 Remove the spindles of the c h temperature adjustment knob by delicately pulling it with pliers in the direction shown by the arrow in Figure 10 4 4 Third Part Figure10 4 Unscrew the four screws that hold the Control p c b on the control panel 5 Remove it by lifting its rear edge and freeing it from any of the wiring 6 Re assemble the Control p c b followi
37. ng the removal procedures in the reverse order Important When re assembling the Control p c b 7 Fit the p c b into the control panel by first inserting the front lower edge under the control knob shaft Lower the rear edge and ensure that no wiring is trapped beneath 8 Insert the spindle in the control panel knob untill the notch M Figure 11 reaches the potentiometer edge It is not necessary to force it in the knob 9 While tightening the screws that fix the Control p c b on the control panel keep the p c b towards the control panel fascia making sure RIVA HEAT ONLY SERVICE MANUAL REV A edition 0106 Control p c b 11 62 of the contact between the boiler reset button N and the tab O Figure 12 p Figure 11 Attention After installing the Control p c b 10 Make sure the c h temperature adjustment knob can move freely for the complete range If not remove the spindle again as described at step 3 turn the knob half a turn and re insert the spindle 11 Operate the boiler and close the gas supply so that the boiler goes into the safety lock out state Verify the correct operation of the boiler reset button by pressing and releasing it 4 5 Third Part EEJ Thermal Control Operates motorised valve Ignition device not fed edition 0106 Control p c b 11 62 Switch in the function mode Request for heat from room thermostat YES Starts the circulator After
38. ning After cleaning or replacement as detailed above if it deemed necessary to undertake a combustion analysis 7 2 Third Part edition 0106 Primary Circuit Flow Switch 1 Function 2 Checks 3 Removal EB Function The Primary circuit flow switch A in Figure 1 function is to detect water flow rate through the primary hydraulic circuit of the boiler A TT Figure 1 This hydraulic membrane operated electrical micro switch device will control the functioning of the ignition control circuit providing there is an adequate quantity and flow of water in the primary circuit Any failure of the pump or obstructions in the primary circuit will not allow the device to operate This device is connected to the electronic control p c b and if after the pump operates it does not activate within 30 seconds the control board will indicate that a fault condition has occurred RIVA HEAT ONLY SERVICE MANUAL REV A Primary Circuit Flow Switch Checks Warning Isolate the boiler from the mains electricity supply before removing any covering or component A Mechanical function 1 Remove the front panel of the case 2 Start and stop the boiler 3 Looking through the switch box verify the position of the shaft B referring to Figure 2 Boiler OFF B Figure 2 Boiler ON B Electrical check It is possible to verify the general operation of the switch by measuring the e
39. ressure Gauge Expansion Vessel and Temperature Pressure Gauge Function Checks Removal of the C h Expansion Vessel Removal of the Temperature Pressure Gauge EB Function Figure 2 The C h expansion vessel A in Figure 1 Removal of the C h Expansion function is to allow for the volume expansion of Vessel the c h circuit water due to the temperature rise a2 1 Remove the front panel of the case 2 Completely unscrew the connection D and the lock nut E and remove the expansion vessel Figure 3 3 Re assemble the parts in reverse order of removal ES Removal of the Temperature Pressure Gauge 1 Remove the front and side panels of the case Figure 1 2 Empty the primary circuit EN Checks 3 Remove the fork F and remove the probe G Figure 4 1 Empty the primary circuit of the boiler 2 Remove the protective cap C Figure 2 from the valve on the top of the c h expansion vessel and connect a suitable air pressure gauge 3 Check the pre load pressure It would be 14 5 psi RIVA HEAT ONLY SERVICE MANUAL REV A 9 1 Third Part edition 0106 Expansion Vessel and Temperature Pressure Gauge 5 Squeeze the tabs J to release the temperature pessure gauge K and remove it Figure 6 m Figure 4 4 Remove the probe holder spring H freeing the probe 1 Figure 5 Figure 6 6 Re assemble the parts in reverse order of removal Figure 5 RIVA HEAT ONL
40. s switched ON at maximum power and will control by modulating to 40 of the max power output Figure 2 RIVA HEAT ONLY SERVICE MANUAL REV A edition 0106 Control p c b 11 62 During the c h operation Figure 2 the signal coming from the c h temperature probe is compared to the signal given by the control panel through the adjustment made by the user knob in Figure 2 The result of such a comparison operates the modulation of the gas valve consequently changing the useful output of the boiler The control sequence is illustrated in detail in sections 12 EB Operation Lights The Control p c b is provided with three lamps L E D indicators F in Figure 1 that give optical information during the operation of the boiler The green lamp on the left gives information whether the boiler is in stand by mode or during the normal operation of the boiler The following table gives the relationship between the lamp indication and its meaning P e ik Boiler in stand by condition function control in position A short pulse every 4 seconds Antifreeze system active Boiler ON condition function control in position dk d 1 second ON 1 second OFF Figure 3 With the boiler switched ON all the lamps F in Figure 1 are activated The following table gives the relationship between each of the possible lamp combinations and their meaning
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42. t between the blades of the heat exchanger clean with a brush or non metallic bristle brush In any case avoid any actions that can damage the protective varnish with which the exchanger has been covered RIVA HEAT ONLY SERVICE MANUAL REV A Primary Heat Exchanger 2 2 Third Part Pump 1 Function 2 Checks 3 Removal EB Function The pump A in Figure 1 has the function of making the water in the main circuit circulate through the main heat exchanger and therefore through the c h system Figure 1 Checks A Check that the pump is not seized and that the movement of the rotor is not subject to mechanical impediments With the boiler off remove the front panel Remove the air release plug of the pump and turn the rotor with a screwdriver RIVA HEAT ONLY SERVICE MANUAL REV A edition 0106 Pump B Check the electrical continuity With the boiler off remove the control panel lid as described on page 1 2 of the third part and measure the electrical resistance on the control p c b Figure 2 removing the pump power supply cable and measuring the resistance of said wiring Electrical resistance of the windings at ambient temperature must be about 51 7 Figure 2 C Check the absence of starting defects With the boiler off remove the front case panel Remove the air release p
43. tion electrode its wiring or connection O Gas injectors blocked O Faulty modulation gas valve faulty on off operators or not electrically supplied O Faulty Full sequence ignition device Section 4 shows the sequence of the operations that are carried out at the start of every ignition cycle and during normal functioning EJ Checks A Lock sequence 1 Start the boiler until the burner is ignited 2 With the burner firing interrupt the gas supply The Full sequence ignition device must carry out a complete ignition cycle and then stop 3 By turning the boiler on and off by means of the function switch the device must not unlock and the burner must not turn on Removal 1 Remove the front body panel and tilt the card holder panel Figure 2 2 Unscrew the screw C and remove protection cover D of the connection disconnect flame detection cable E and ignition cable F Figure 2 6 1 Third Part edition 0106 Full Sequence Ignition Device S4567A 1019 4 Pull the ignition device out pulling it frontally follow the arrows on Figure 2 5 With the help of a screwdriver open the four clamps H two on top and two on bottom of the device Figure 3 6 Re assemble the device following the removal procedures in the reverse order Figure 3 EB ignition and Control Sequence Supply from the electronic control circuit Shutdown memorised Resets shutdown Waiting time finished
44. tment of the minimum gas pressure at the burner on the modulation operator of the gas valve After any adjustment operation the selector has to be brought back to the normal position ON O Selector 2 This selects the boiler functions on the basis of the type of gas used It allows the selection of the maximum supply current given to the modulator device To set selector 2 correctly follow the table in Figure 6 Gas Suplly Position of selector Natural gas ON L P G OFF Figure 6 Selector 3 This forces the functioning of the boiler in order to allow the optimal gas pressure at the burner to be adjusted during the ignition phase The adjustment is done by means of the potentiometer marked ACC Figure 1 on page 4 1 After the adjustment operations bring the selector back to the normal position ON ON 1 Ua OFF 0 gas pressure calibration Normal Figure 7 Selector 4 This allows you to select the minimum time that must pass between two ignitions of the burner in c h function 3 min OFF 0 30 sec Figure 8 4 3 Third Part Kall Ignition Gas Pressure Adjustment By using the device I Figure 1 marked ACC it is possible to adjust the gas pressure at the injectors in the ignition phase This pressure is maintained at the injectors until ignition occurs ionization signal To carry out the adjustment move the function selector 3 to the OFF position
45. y or fauly electronic control Faulty Electronic control ignition p c b TI X UE xx 3x o an FI e Lamp Lamp OFF ON Flashing lamp alternate with another lamp Flashing lamp alone or simultaneously with an other lamp These conditions are normal only for a short time when the power supply is applied to the boiler IF permanent they indicate a faulty p Check that the flue pipe and the air intake pipe have been made correctly and mechanical stability is guaranteed 6 Correct operation When starting the boiler check the burner maximum minimum and ignition gas pressures Check that the Venturi pressure is sufficient to ensure proper operation Check that the unit runs properly in the c h mode using the function knob of the control panel 7 Safety and control devices Check that safety thermostat ignition device air pressure switch and the main circuit flow switch work properly 8 Instruct the user on how to use the unit correctly and explain to him the functions of the external commands the actions he needs to take and what to do in case of malfunction or emergency M130 30CR 6 Second Part M130 30CR EJ Gas Conversion 1 Check that the gas cock fitted on the gas supply pipe is turned off and the appliance is switched off at the circuit breaker 2 Remove the front and side panels of the case 3 Take off the lid of the sealed chamber 4
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