Biasi RIVA COMBI Service Manual
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Biasi RIVA COMBI Service Manual

Biasi RIVA COMBI Service Manual

Wall hung gas boiler for central heating and domestic hot water supply
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See also: User Manual and Instructions , Install and Operation Instructions
WALL HUNG GAS BOILER FOR
CENTRAL HEATING AND DOMESTIC

HOT WATER 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.
— Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
Manufactured by:
Biasi S.p.A.
Verona, Italy
*17562.0183.0*
17562.0183.0 0406 (57A4)USA
COMBI
Distributed By:
Quincy Hydronic Technologies, Inc.
80 Rochester AVE. Suite # 12
Portsmouth, NH 03801
Phone: 603-334-6400
Fax: 603-334-6401
RIVA COMBI SERVICE MANUAL - REV A

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Summary of Contents for Biasi RIVA COMBI

  • Page 1: Hot Water Supply

    — 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 RIVA COMBI SERVICE MANUAL - REV A...
  • Page 2 ___________________________________________________________________________________________________ First Part Service Manual _______________________________________________________________ RIVA COMBI SERVICE MANUAL – REV A...
  • Page 3 M35.30CB - 5 M35.30CB - 7 fig. 4 Part three is also arranged on two levels (fig. fig. 1 5); the first is a number assigned to each component, the second indicates technical RIVA COMBI SERVICE MANUAL – REV A...
  • Page 4 C = Sealed Chamber maintenance. Series Models Max useful power in c.h. 30 = 30,00 kW (25 800 kcal/h) M35------------------|M35.30CB Boiler series fig. 6 RIVA COMBI SERVICE MANUAL – REV A...

  • Page 5: Table Of Contents

    HYDRAULIC DIAGRAM……………………………………………………M35.30CB - 1 ELECTRICAL DIAGRAM………………………………………………..…M35.30CB - 2 GAS ADJUSTMENT DATA………………………………………………..M35.30CB - 3 FAULT FINDING………………………………………………………….…M35.30CB - 4-5 CIRCUIT VOLTAGES………………………………………………………M35.30CB - 6 OPERATION LIGHTS………………………………………………………M35.30CB - 7 START UP CHECKS………………………………………………………..M35.30CB - 7 GAS CONVERSION…………………………………………………...……M35.30CB - 8 RIVA COMBI SERVICE MANUAL – REV A...
  • Page 6 ___________________________________________________________________________________________________ Second Part M35.30CB Maintenance Characteristic Verification _______________________________________________________________ RIVA COMBI SERVICE MANUAL – REV A...

  • Page 7: Overall View

    Modulation Safety gas valve thermostat Three way Control diverter valve panel Primary circuit flow switch fig. 1 Hydraulic Diagram C.h. water flow D.h.w.outlet C.h. water return D.c.w.inlet fig. 2 RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 1...

  • Page 8: Electrical Diagram

    - white * ---> directly connected to the electronic ignition board rd - red gy - grey ye - yellow vt - violet og - orange gnye - green/yellow fig. 3 RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 2...

  • Page 9: Gas Adjustment Data

    1.89 2.57 3.33 4.22 5.34 Natural m³/h 48.7 53.0 60.7 72.4 84.0 96.0 107.7 121.1 1080 1400 1760 2230 Propane inwc 1.45 1.69 2.25 3.21 4.34 5.62 7.06 8.95 lb/h RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 3...

  • Page 10: M35.30Cb

    ___________________________________________________________________________________________________ Second Part M35.30CB Maintenance Characteristic Verification _______________________________________________________________ RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 4...
  • Page 11 ___________________________________________________________________________________________________ Second Part M35.30CB Maintenance Characteristic Verification _______________________________________________________________ RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 5...

  • Page 12: Circuit Voltages

    Fan and Air Pressure Gas Valve Device 120~ Full Sequence Device Safety 120~ Thermostat 120~ Air pressure Switch Control p.c.b. 120~ Control p.c.b. Fan and Air Pressure Device 120~ 0,3= RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 6...

  • Page 13: Operation Lights

    Check that the circuit is properly filled at a malfunction or emergency. suitable pressure and that there are no leaks Check it is correctly bled of air. 5) Combustion by-product expulsion system: RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 7...

  • Page 14: Gas Conversion

    (included with the conversion kit) figure 9.3). indicating the type of gas, and the gas pressures to which the appliance has been set. Reassemble the front and side panels of the case. Figure 9.3 RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 8...
  • Page 15 Dip-switch Selectors Ignition Gas Pressure Adjustment Max C.h. Power Regulation Anti-frost System Uniform Temperature System Hydraulic Parts Checking System Advanced Probe Control System Checks Removal of the Control p.c.b. Thermal Control in Winter Mode RIVA COMBI SERVICE MANUAL – REV A...
  • Page 16 Removal of the Fan 13-2 Inspection and Removal of the Venturi Device 13-2 Removal of the Air Pressure Switch 13-2 Ignition and Detection Electrodes, Burner and Injectors 14-1 Function 14-1 Checks 14-1 Removal 14-1 RIVA COMBI SERVICE MANUAL – REV A...
  • Page 17 _______________________________________________________________ Safety Thermostat 15-1 Function 15-1 Checks 15-1 Removal 15-1 Electric Resistances 16-1 Pump Resistance 16-1 Gas Valve Resistance 16-1 Temperature Probe NTC Resistance 16-1 Fan Resistance 16-1 Short Spare Parts List 17-1 RIVA COMBI SERVICE MANUAL – REV A...
  • Page 18 ___________________________________________________________________________________________________ _______________________________________________________________ RIVA COMBI SERVICE MANUAL – REV A...

  • Page 19: O General Access And Emptying The Hydraulic Circuits

    Warning: Isolate the boiler from the mains electricity supply before removing 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. Figure 4 RIVA COMBI SERVICE MANUAL – REV A...
  • Page 20 For this purpose, remove the front and side panels of the case, remove the screws G as indicated in Figure 6 and remove the lid. Figure 8 RIVA COMBI SERVICE MANUAL – REV A...
  • Page 21 1) Turn off the domestic cold water inlet cock and turn on the hot water taps and any drain cock. 2) Turn on the storage tank drain cock L in Figure 9 and empty the d.h.w. tank. Figure 9 RIVA COMBI SERVICE MANUAL – REV A...
  • Page 22 ___________________________________________________________________________________________________ Third Part (edition-0106) General Access and Emptying Hydraulic Circuits _______________________________________________________________ RIVA COMBI SERVICE MANUAL – REV A...

  • Page 23: O Primary Heat Exchanger

    Removal downwards the pipe I (Figure 4) freeing it from the connection of the primary heat 1) Remove the case panels. exchanger. 2) Empty the primary circuit. 3) Remove the sealed chamber lid. RIVA COMBI SERVICE MANUAL – REV A...
  • Page 24 1.5 in, moving it downwards and then or non-metallic bristle brush. pulling it outside (Figure 8). In any case, avoid any actions that can damage the protective varnish with which the exchanger has been covered. Figure 8 RIVA COMBI SERVICE MANUAL – REV A...

  • Page 25: O D.h.w. Storage Tank

    The flow of the primary circuit runs through the 5) Loosen completely the connection G and coil from the top to the bottom. The domestic cold move apart the small pipe. water flows against the current RIVA COMBI SERVICE MANUAL – REV A...
  • Page 26 4) Reassemble the boiler carrying out the 1) Unscrew the connections M,N,O (Figure 5). removal operations in reverse order. Attention - Only use the lubricant recommended in the spare parts catalogue to lubricate the O-rings. Figure 5 RIVA COMBI SERVICE MANUAL – REV A...

  • Page 27: Checks

    (Figure 2) removing the pump power supply cable and measuring the resistance of said wiring. Figure 3 Electrical resistance of the windings (at ambient temperature) must be about 51.7 Ω. RIVA COMBI SERVICE MANUAL – REV A...
  • Page 28 6) Unscrew the connection G. 7) Disconnect the connector F and pull out the power supply cable. 8) Remove the pump. 9) Reassemble the pump carrying out the removal operations in reverse order. RIVA COMBI SERVICE MANUAL – REV A...

  • Page 29: Three Way Diverter Valve

    1) Remove the front and the side panels of the motor windings (the motor must be disconnected boiler. from the wiring) is also given. 2) Disconnect the connectors D (Figure 5). RIVA COMBI SERVICE MANUAL – REV A...

  • Page 30: Removal Of Diverter Group And Its Internal Parts

    5) Remove the pump (see chapter of the pump). 6) Unscrew the connections I,J,K,L (Figure 7). 7) Unscrew the connections connected to N,O,P (Figure 8). 8) Loosen the screw M (Figure 8). RIVA COMBI SERVICE MANUAL – REV A...

  • Page 31: Control P.c.b. 11.62

    Outlet command Pump Three way diverter valve Full sequence ignition device Modulation operator Appliance operation lights* Lock-out signal lamp* *control panel fascia Figure 1 RIVA COMBI SERVICE MANUAL – REV A...
  • Page 32 14 and 15. Operation Lights The Control p.c.b. is provided with three lamps (L.E.D. indicators) G in Figure 1 that give optical information during the operation of the boiler. Figure 2 RIVA COMBI SERVICE MANUAL – REV A...

  • Page 33: Dip-Switch Selectors

    The adjustment is done by means of the potentiometer J marked “ACC" (Figure 1 on page 6-1). Figure 5 RIVA COMBI SERVICE MANUAL – REV A...

  • Page 34: Ignition Gas Pressure Adjustment

    This adjustment does work quite well even if there is a problem with the not influence the maximum useful output NTC probes. delivered in d.h.w. function. The table below summarizes the boiler operation. RIVA COMBI SERVICE MANUAL – REV A...

  • Page 35: Checks

    If not, remove the spindle by the arrow in Figure 11. RIVA COMBI SERVICE MANUAL – REV A...

  • Page 36: Thermal Control In Winter Mode

    After 25 second circulator Primary circuit flow off and faulty primary cir switch OK? cuit (see LED table) Is domestic hot water outlet temperature lower than that required? Supplies the ignition device Ignition device not fed RIVA COMBI SERVICE MANUAL – REV A...

  • Page 37: Fan And Air Pressure Device 11.61

    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 COMBI SERVICE MANUAL – REV A...
  • Page 38 ___________________________________________________________________________________________________ Third Part (edition-0106) Fan and Air Pressure Device 11.61 _______________________________________________________________ RIVA COMBI SERVICE MANUAL – REV A...

  • Page 39: Checks

    2) Unscrew the screw C and remove protection The ignition device has some components cover D of the connection; disconnect flame connected to it which can cause triggering of the shutdown condition; these components are: RIVA COMBI SERVICE MANUAL – REV A...
  • Page 40 Ignition time starts Presence of flame? Closes gas valve Stops ignition sparks Ignition time Memorizes shutdown finished? Shutdown indicator light on Stops ignition sparks Gas valve open Reset push button pressed? Presence of flame? RIVA COMBI SERVICE MANUAL – REV A...

  • Page 41: O Modulating Gas Valve

    Nomenclature 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 valve inlet pressure test point. Figure 3 RIVA COMBI SERVICE MANUAL – REV A...

  • Page 42: Checks

    After any service operation on the components of the gas circuit check all the connections for gas leaks. Warning: After cleaning or replacement as detailed above, if it deemed necessary to undertake a combustion analysis. Figure 4 RIVA COMBI SERVICE MANUAL – REV A...

  • Page 43: Primary Circuit Flow Switch

    4) Re-assemble the parts in reverse order of removal. Refer to Figure 3 for the correct Warning: Isolate the boiler from the mains wiring connectors on the switch. electricity supply before removing any covering or component. RIVA COMBI SERVICE MANUAL – REV A 10-1...
  • Page 44 H (see Figure 5). 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 COMBI SERVICE MANUAL – REV A 10-2...

  • Page 45: O Expansion Vessels And Temperature-Pressure Gauge

    3) Check the pre-load pressure. It would be 14.5 psi. Figure 4 5) Re-assemble the parts in reverse order of removal. RIVA COMBI SERVICE MANUAL – REV A 11-1...

  • Page 46: Removal Of The D.h.w. Expansion Vessel

    3) Unscrew the connection M and remove the Figure 8 probe N (Figure 6). 6) Re-assemble the parts in reverse order of removal. Figure 6 4) Remove the probe holder spring O freeing the probe P (Figure 7). RIVA COMBI SERVICE MANUAL – REV A 11-2...

  • Page 47: O Temperature Probe Ntc

    (d.h.w. NTC) B in Figure 2. Figure 3 4) Remove of the d.h.w. NTC: Remove the fork that blocks the probe cable. Pull downwards the cable connected to the Figure 2 RIVA COMBI SERVICE MANUAL – REV A 12-1...
  • Page 48 Temperature Probe NTC _______________________________________________________________ probe D (Figure 4) and then disconnect the cable from the control p.c.b. Figure 4 5) Reassemble the Temperature probe carrying out the removal operations in reverse order. RIVA COMBI SERVICE MANUAL – REV A 12-2...

  • Page 49: O Fan, Venturi Device And Air Pressure Switch

    This test must be carried out with the sealed chamber lid. chamber closed. 2) Disconnect the connectors D (Figure 2) and measure the electrical resistance of the motor that has to be about: 7.2 Ω. RIVA COMBI SERVICE MANUAL – REV A 13-1...
  • Page 50 Air pressure switch, the removal operations in reverse sequence. refer to Figure 6. Warning: To correctly connect the Air pressure switch, refer to Figure 6 and Figure 3 for the correct wiring. RIVA COMBI SERVICE MANUAL – REV A 13-2...

  • Page 51: O Ignition And Detection Electrodes, Burner And Injectors

    2) Check for the correct distance between the 4) Disconnect the electrode wires from the full metallic edges of the ignition electrodes (see sequence ignition device. Figure 2). 5) Unscrews the screws C (Figure 4). RIVA COMBI SERVICE MANUAL – REV A 14-1...
  • Page 52 8) Extract the electrodes from the burner. 9) 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. Figure 5 RIVA COMBI SERVICE MANUAL – REV A 14-2...

  • Page 53: 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. Figure 3 RIVA COMBI SERVICE MANUAL – REV A 15-1...
  • Page 54 4) Disconnect the connectors E (Figure 4). Figure 4 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 COMBI SERVICE MANUAL – REV A 15-2...

  • Page 55: Pump Resistance

    Fan Resistance Figure 1 Pump Resistance = 51.7 Ω. Gas Valve Resistance 7.2 Ω Figure 4 114 Ω Figure 2 On-off operator approx. 1 122 Ω* * at ambient temperature Figure 5 RIVA COMBI SERVICE MANUAL – REV A 16-1...
  • Page 56 Ignition Electrode (left) BI1203 105 Network Components Ignition Electrode (right) BI1203 106 Network Components Detection Electrode BI1203 107 Network Components Temperature Pressure BI1555 100 Wika Italiana Gauge D.h.w. Expansion Vessel KI1051 106 Zilmet RIVA COMBI SERVICE MANUAL – REV A 17-1...
  • Page 57 ___________________________________________________________________________________________________ Third Part (edition-0106) Short Spare Parts List _______________________________________________________________ RIVA COMBI SERVICE MANUAL – REV A 17-2...

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