Biasi Riva Plus Installation & Operation Instructions
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Biasi Riva Plus Installation & Operation Instructions

Wall hung gas boiler for central heating supply
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Riva
Riva
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 fi re or explosion may result causing property dam-
age, personal injury or loss of life.
—
Do not store or use gasoline or other fl ammable 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. Fol-
low the gas supplier's instructions.
•
If you can not reach your gas supplier call the fi re department.
—
Installation and service must be performed by a qualifi ed installer,
service agency or the gas supplier.
PLUS
PLUS

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Summary of Contents for Biasi Riva Plus

  • Page 1 Riva Riva PLUS PLUS 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 fi re or explosion may result causing property dam- age, personal injury or loss of life.
  • Page 2 CSA 4.9 and is CSA compliant. This Riva Plus boiler has a 2 year warranty, a copy of which is provided with the boiler. Please be sure to return the warranty registration card as the warranty will be void without your boiler’s serial numbers (located on the ratings label af xed to the boiler), date of installation and the name of your installer being on record in our les.

  • Page 3: Table Of Contents

    Zone Valve Microswitch Connection 12.5 Finishing 12.6 Circulator Sizing Circ. Cap. as a Function of Flow Rate 13.1 Expansion Vessel 13.2 Piping 31-34 Primary-Secondary Piping 14.1 Primary-Secondary with Zone Valves 14.2 Manifold Piping with Zone Valves or Circ. 14.3 RIVA PLUS MANUAL...

  • Page 4: Warnings

    Checking the Combustion Fan 17.7 Checking the Flue 17.8 Visual Inspection of Appliance 17.9 Gas Pressures and Soundness 17.10 Condensate trap 17.11 Venting Spare Parts 45-47 Separate Vent 18.1 Coaxial Vent 18.2 Roof Vent 18.3 Installer Notes RIVA PLUS MANUAL...
  • Page 5 Caution: Do not use this boiler if any part has been under water. Immediately call a qualifi ed service technician to inspect the boiler and to replace any part of the control system and any gas control which has been under water. RIVA PLUS MANUAL...
  • Page 6 If any of the symptoms of CO occur, or if any of the signs of carbon monoxide are present, VACATE THE PREMISES IMMEDIATELY AND CONTACT A QUALIFIED HEATING SER- VICE COMPANY OR THE GAS COMPANY OR THE FIRE DEPARTMENT. ONLY QUALIFIED, LICENSED SERVICE CONTRACTORS SHOULD PERFORM WORK ON YOUR BIASI RIVA PLUS BOILER. RIVA PLUS MANUAL...

  • Page 7: Important Information

    - B149 Installation Codes E. ANSI/ASME - CSD-1 The above codes are available from: National Fire Protection Association (NFPA) CSA International Battery March Park 8501 E. Pleasant Valley Road Quincy, Massachusetts, 02269 Cleveland, OH 44134-5575 http://www.nfpa.org http://www.csa-international.org RIVA PLUS MANUAL...

  • Page 8: General Information

    General Information The Riva Plus is a high ef ciency condensing, wall mounted gas boiler which provides central heat. The boiler features a gas valve which modulates the energy input from 49476 BTU/h to 116008 BTU/h. The boiler is shipped fully assembled with the components list- ed on page 11.
  • Page 9 Flue pipe diameter 2.25/4 Sides Coaxial 3.25/5 Bottom Twin split pipes 3.25/3.25 Flue pipe enclosed Nominal heat ow rate 116.0 Flue pipe free air (0/2000ft) Nominal heat ow rate 110.2 (2000/4500ft) Min Exhaust temperature °F Max Exhaust temperature °F RIVA PLUS MANUAL...

  • Page 10: Parts List

    14 Modulation operator 31 Water supply inlet cock 15 Gas valve outlet pres. Test point 32 Condensate trap 16 Gas valve inlet pres. Test point 33 Condensing heat exchanger 17 Central heating expansion vessel 34 Flue termostat 10 RIVA PLUS MANUAL...

  • Page 11: Internal Piping And Parts List

    Internal Piping & Parts List Note: Pressure Relief Valve (#19) should be piped to a drain or to the oor as lose as pos- sible to a drain. RIVA PLUS MANUAL...

  • Page 12: Electric Diagrams

    - red gy - grey ye - yellow Caution: Label all wires prior to disconnection when gnye - green/yellow servicing controls. Wiring errors can cause im- proper and dangerous operation. Verify proper operation after servicing 12 RIVA PLUS MANUAL...

  • Page 13: Sequence Of Operation

    5. Electric Diagrams Cont. Sequence of Operation RIVA PLUS MANUAL...

  • Page 14: Installation Location

    Air Opening 0 to 12" Figure 6.2 When choosing an installation location insure the exhaust and intake pipes comply with NFPA 54. The drawing on the next page illustrates the restrictions on exhaust locations. 14 RIVA PLUS MANUAL...

  • Page 15: Exhaust Pipe Location

    Avoid installing exhaust hood on the North, West, or the side of the house receiving the prevailing winds. The vent should not be situated so that the ue gases are directed towards brickwork, siding, or other construction, in such a manner that may cause damage from heat or condensate from the ue gases RIVA PLUS MANUAL...

  • Page 16: Mounting Bracket

    If you are using a separate pipe system drill holes marked B and C (ø 3.25”) shown below as well as on the paper template. Remove paper template and hang boiler on bracket. Ø 3.1 Ø 3.1 A, B, C Ø 4.0 15.8 10.1 6.9 gas 2.5 2.6 15.2 Condense Figure 8.1 16 RIVA PLUS MANUAL...

  • Page 17: Venting

    Sections 7.2, 7.3 or 7.4 of CAN/CGA B149, Installation Codes, or applicable provi- sions of the local building codes. If the Biasi Riva replaces a boiler that was attached to a common vent system, the common venting system is likely to be too large for proper venting of the appliances remaining con- nected to it.

  • Page 18: Restrictor Sizing

    9. Venting Cont. Restrictor sizing fi tting the fl ue system Figure 9.1 Figure 9.2 Table 9.1 18 RIVA PLUS MANUAL...

  • Page 19: Choice Of Flue

    Connect exhaust (inner) pipe to concentric elbow. • Connect intake (outer) pipe to concentric elbow. • Secure elbow to boiler using gasket and four screws provided. • Secure end cap on the intake pipe outside the house. RIVA PLUS MANUAL...
  • Page 20 Attach each collar to the boiler with the gasket and screws provided. • Insert each elbow into its corresponding collar. • Connect each pipe to its corresponding elbow (as shown in the diagram). • Secure end cap on the intake and exhaust pipe outside the house. 20 RIVA PLUS MANUAL...
  • Page 21 Slide one rubber wall trim piece on the pipe from inside and one from outside. • Attach each collar to the boiler with the gasket and screws provided. • Insert each elbow into its corresponding collar. • Connect each pipe to its corresponding elbow. RIVA PLUS MANUAL...
  • Page 22 Slide one rubber wall trim piece on the pipe from inside and one from outside. • Attach each collar to the boiler with the gasket and screws provided. • Insert each elbow into its corresponding collar. • Connect each pipe to its corresponding elbow. 22 RIVA PLUS MANUAL...
  • Page 23 Attach each collar to the boiler with the gasket and screws provided. • Insert each elbow into its corresponding collar. • Connect each pipe to its corresponding elbow (as shown in the diagram). • Secure end cap on the intake and exhaust pipe outside the house. RIVA PLUS MANUAL...
  • Page 24 Connect exhaust (inner) pipe to concentric elbow. • Connect intake (outer) pipe to concentric elbow. • Secure elbow to boiler using gasket and four screws provided. • Secure end cap on the intake pipe outside the house. 24 RIVA PLUS MANUAL...

  • Page 25: Pipe Connections

    The condenste trap is provided with two electrodes: if the drain pipe is plugged or in any case in which the condensate isn’t correctly evacuated, the condensate level in the trap rises putting in contact the electrodes thus causing the boiler lock- out. RIVA PLUS MANUAL...

  • Page 26: Gas Pipe Connections

    The boiler and its individual shutoff valve must be disconnected from the gas supply piping sys- tem during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa). WARNINGS DO NOT USE A FLAME FOR CHECKING GAS LEAKS 26 RIVA PLUS MANUAL...

  • Page 27: Electrical Connections/Wiring

    WARNING Power supply Note: Do not connect live wires to terminal block thermostat terminals 1-3. External controls terminal block Figure 12.5 • Connect the earth wire(yellow/green). Boiler must be wired directly to earth ground on breaker panel. RIVA PLUS MANUAL...

  • Page 28: Room Thermostat Connection

    Figure 12.8 • Connect the dry contact switch to termi- • When connecting any type of relay con- nals 1 and 3 shown in Fig. 12.9. trol, the jumper J in Fig. 12.8 must be re- moved. 28 RIVA PLUS MANUAL...

  • Page 29: Zone Valve Microswitch Connection

    Route the electrical supply cord and the external control cord as illustrated in Fig. 12.12. To the external control device To the fused spur isolation switch Figure 12.12 • Lock the cords in place with the exible cord clamps. • Replace the control panel reversing the steps on page 27. RIVA PLUS MANUAL...

  • Page 30: Circulator Sizing

    23 ft at most. For greater differences, increase the pre-load pressure in the C.h. expansion vessel (17 on page 10) and the system when cold, by 0.1 bar for additional 3.3 ft. For systems with volumes greater than 154l, an additional expansion vessel must be provided. 30 RIVA PLUS MANUAL...

  • Page 31: Piping

    Figure 14.2. It is important that the separator be at least 2” in size to ensure proper perfor- mance. Boiler supply Boiler Return No more than 8" ¾” 1 ¼” 2" System System supply return At least 16" RIVA PLUS MANUAL...

  • Page 32: Primary-Secondary Piping

    14. Piping Cont. 14.1 Primary – Secondary Piping: All external piping components are to be supplied by the installer. It is very important to use a hydraulic separator before secondary circulators. 32 RIVA PLUS MANUAL...
  • Page 33 14. Piping Cont. 14.2 Primary – Secondary Piping with Zone Valves: All external piping components are to be supplied by the installer. It is very important to use an hydraulic separator before secondary circulators. RIVA PLUS MANUAL...
  • Page 34 14. Piping Cont. 14.3 Manifold Piping with Zone Valves (shown conn. to radiators): All external piping components are to be supplied by the installer. 34 RIVA PLUS MANUAL...

  • Page 35: Commissioning

    If during the ignition attempt period the boiler fails to light, the full sequence control p.c.b. will go to lock- out and the lock-out signal lamp D will appear. To reset the boiler turn the knob B ( gure 15.3) on the 0 position and then press and release the boiler reset button C (Fig. 15.3). RIVA PLUS MANUAL...

  • Page 36: Checking The Gas Pres. At The Burner

    Switch on the boiler. points must be sealed. • Check the maximum gas pressure and com- pare the value on the gauge with the value indicated in the Section 2 on page 9 (gas pressures at the burner). 36 RIVA PLUS MANUAL...

  • Page 37: Adjustment Of The Gas Pressure

    (D on Figure 15.3). To reset the boiler turn the knob B ( gure 15.3) on the 0 position and then press and release the boiler reset button (C on Figure 15.3). RIVA PLUS MANUAL...

  • Page 38: Checking The Burner Ignition

    Adjust the gas pressure at the burner to the value according to the useful c.h. output wanted (Tab. 15.1). • Reassemble the service panel. • Close the gas valve outlet pressure test point 15 ( gure 15.5). • Reassemble the front pannel of the case. 38 RIVA PLUS MANUAL...

  • Page 39: Labels Placement

    All the labels supplied with the boiler are numbered for reference. According to Figure 15.10 place all the labels on the boiler. Use label numbered as 1 (already installed in the front panel) to begin the placement in the correct way. RIVA PLUS MANUAL...

  • Page 40: Instructing The User

    2.00 2.23 2.46 2.69 2.91 3.14 3.36 ft³/h 5.77 6.56 7.31 8.07 8.82 9.54 10.30 11.02 1060 1270 1500 1740 2000 2270 inwc. 1.45 1.69 2.25 3.21 4.34 5.62 7.06 8.95 Propane Kg/h lb/h Table 15.1 40 RIVA PLUS MANUAL...

  • Page 41: Gas Conversion

    ( gure 16.2) adhesive label (included with the conver- sion kit) 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. RIVA PLUS MANUAL...

  • Page 42: Annual Maintenance

    Open the central heating drain cock (F in Fig. 17.3). • Empty the c.h. system. • Close the central heating drain cock (F in Fig. 17.3). • Open the pressure reducing automatic ll valve (28 on Section 4) Figure 17.3 42 RIVA PLUS MANUAL...

  • Page 43: Cleanig The Burner

    Remove the rst elbow from the horizon- • Inspect the venture device inside the out- tal run of the exhaust to the outside. let of the combustion fan. Make sure that it is free of any dirt build up or blockage. RIVA PLUS MANUAL...

  • Page 44: Visual Inspection Of Appliance

    Using pliers, remove the spring D moving it upwards. • Disconnect the wirings from the trap. • Reassemble carrying out the removal op- erations in reverse order. The trap should be serviced once a year dur- ing the annual service. Figure 17.6 44 RIVA PLUS MANUAL...

  • Page 45: Separate Vent

    Vent Part Spares 18.1 Separate venting: Description Order Number Twin pipe kit 10999.0393.0 RIVA PLUS MANUAL...

  • Page 46: Coaxial Vent

    18. Vent Part Spares Cont. 18.2 Coaxial venting: Description Order Number Coaxial ue kit 10999.0387.0 46 RIVA PLUS MANUAL...

  • Page 47: Roof Vent

    18. Vent Part Spares Cont. 18.3 Roof venting Part Description Order Number Roof ue kit 10999.0392.0 For any spare parts, please contact QHT Inc. at 800-501-7697. RIVA PLUS MANUAL...

  • Page 48: Installer Notes

    Installer: Original Purchaser: ________________________ ___________________________ ________________________ ___________________________ ________________________ ___________________________ _______________________________________________________________________ Performance Tests: GROSS STACK TEMPERATURE __________________ ROOM TEMPERATURE (AMBIENT) ________________ NET STACK TEMPERATURE _____________________ __________________ ___________________ SMOKE READING ___________________ COMBUSTION EFFICIENCY _________________ COMMENTS ___________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 48 RIVA PLUS MANUAL...
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