Biasi Riva Plus Installation And Operation Instructions Manual
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Biasi Riva Plus Installation And Operation Instructions Manual

Wall hung gas boiler for central heating supply
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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 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
PLUS
Distributed By:
Quincy Hydronic Technologies, Inc.
80 Rochester AVE. Suite # 12
Portsmouth, NH 03801
Phone: 603-334-6400
Fax: 603-334-6401

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  • Page 1 Riva 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 fire or explosion may result causing property damage, personal injury or loss of life. —...
  • Page 2 Riva Plus Manual...
  • Page 3 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 affixed to the boiler), date of installation and the name of your installer being on record in our files.

  • Page 4: Table Of Contents

    12.4 Zone Valve Microswitch Connection 12.5 Circulator Sizing Circ. Cap. as a Function of Flow Rate 13.1 Expansion Vessel 13.2 Piping 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 5: Warnings

    Checking the Combustion Fan 17.7 Checking the Flue 17.8 45-46 Visual Inspection of Appliance 17.9 Gas Pressures and Soundness 17.10 Condensate trap 17.11 Venting Spare Parts Separate Vent 18.1 Coaxial Vent 18.2 Roof Vent 18.3 Installer Notes Riva Plus Manual...
  • Page 6 — Installation and service must be performed by a qualified installer, service agency or the gas supplier. DANGER Caution: Do not store or use flammable materials, chemicals or flammable liquids, especially gasoline, in the vicinity of this heating appliance. Riva Plus Manual...
  • Page 7 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 SERVICE COMPANY OR THE GAS COMPANY OR THE FIRE DEPARTMENT. ONLY QUALIFIED, LICENSED SERVICE CONTRACTORS SHOULD PERFORM WORK ON YOUR BIASI RIVA HEAT ONLY BOILER. Riva Plus Manual...

  • Page 8: 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 9: General Information

    1. General Information The Riva Plus is a high efficiency 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 listed on page 11.
  • Page 10 Back 2.25/4 Coaxial 3.25/5 Sides Twin split pipes 3.25/3.25 Bottom Nominal heat flow rate Flue pipe enclosed 116.0 (0/2000ft) Flue pipe free air Nominal heat flow rate 110.2 (2000/4500ft) in Exhaust temperature °F Max Exhaust temperature °F Riva Plus Manual...

  • Page 11: 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 Riva Plus Manual...

  • Page 12: Internal Piping And Parts List

    4. Internal Piping & Parts List Note: Pressure Relief Valve (#19) should be piped to a drain or to the floor as lose as possible to a drain. Riva Plus Manual...

  • Page 13: Electric Diagrams

    - white rd - red gy - grey Caution: Label all wires prior to disconnection when ye - yellow gnye - green/yellow servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing Riva Plus Manual...

  • Page 14: Sequence Of Operation

    5.1 Sequence of Operation Riva Plus Manual...

  • Page 15: Installation Location

    CO detector in the boiler room. 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. Riva Plus Manual...

  • Page 16: Exhaust Pipe Location

    USE ONLY LISTED COMPONENTS SUPPLIED WITH THE BOILER. SURFACE DISCOLORATION OF THE BUILDING MAY OCCUR DUE TO IMPROPER INSTALLATION. QHT WILL NOT ACCEPT RESPONSIBILITY OR LIABILITY FOR SUCH DISCOLORATION. The Exhaust Hood must be installed on the leeward side of house and conform to the following guidelines: 1.

  • Page 17: Mounting Bracket

    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 1.9 2.9 15.8 10.1 6.9 gas 2.5 2.6 15.2 Condense Figure 8.1 Riva Plus Manual...

  • Page 18: Venting

    CAN/CGA B149, Installation Codes. When resizing any portion of the common venting system, the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Part 11 of the National Fuel Gas Code, ANSI Z223.1 and/or CAN/CGA B149, Installation Codes. Riva Plus Manual...
  • Page 19 3. A Product-approved vent terminal must be used, and if applicable, a Product-approved air intake must be used. Installation shall be in strict compliance with the manufacturer’s instructions. A copy of the installation instructions shall remain with the appliance or equipment at the completion of the installation. Riva Plus Manual...
  • Page 20 9. Venting Cont. Riva Plus Manual...

  • Page 21: 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 22 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 23 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 24 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 25 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 26 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 27: 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 28: Gas Pipe Connections

    The boiler and its individual shutoff valve must be disconnected from the gas supply piping system 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 Riva Plus Manual...

  • Page 29: Electrical Connections/Wiring

    WARNING Note: Do not connect live wires to Power supply 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 30: Room Thermostat Connection

    To fused spur (120V rating) isolation switch VAC control terminal Power supply terminal block block (Fig 12.9). Power supply External controls terminal block terminal block External controls terminal block Figure 12.9 120 VAC Control Terminal Block Figure 12.8 Riva Plus Manual...

  • Page 31: Zone Valve Microswitch Connection

    Fig. 12.12 • Replace the control panel To the external reversing the steps on control device To the fused spur isolation switch page Figure 12.12 Riva Plus Manual...

  • Page 32: Circulator Sizing

    23 ft at most. For greater differences, increase the pre-load pressure in the C.h. expansion vessel (17 on page 11) 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. Riva Plus Manual...

  • Page 33: Piping

    The second method is a hydraulic separator. Hydraulic separators are available commercially; however you can also construct your own. An example of a hydraulic separator is given in Figure 14.2. It is important that the separator be at least 2” in size to ensure proper performance. Riva Plus Manual...

  • Page 34: 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. Riva Plus Manual...
  • Page 35 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 a hydraulic separator before secondary circulators. Riva Plus Manual...
  • Page 36 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. Riva Plus Manual...

  • Page 37: Commissioning

    D will appear. To reset the boiler turn the knob B (figure 15.3) on the 0 position and then press and release the boiler reset button C (Fig. 15.3). Riva Plus Manual...

  • Page 38: Checking The Gas Pres. At The Burner

    E (Figure points must be sealed. • Set the c.h. temperature 15.4). control knob to its Switch on the boiler. • maximum position. If • Check the minimum gas Riva Plus Manual...

  • Page 39: Adjustment Of The Gas Pressure

    (D on Figure 15.3). To reset the boiler turn the knob B (figure 15.3) on the 0 position and then press and release the boiler reset button (C on Figure 15.3). Riva Plus Manual...

  • Page 40: Checking The Burner Ignition

    15.7 and • By rotating device ensure that room clockwise pressure thermostat is set to “heat increases. demand”. • Adjust the gas pressure at the burner to the value according to the useful c.h. output wanted (Tab. 15.1). Riva Plus Manual...

  • Page 41: 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 42: Instructing The User

    1.76 2.00 2.23 2.46 2.69 2.91 3.14 3.36 Natural 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 Kg/h Propane lb/h Riva Plus Manual...

  • Page 43: Gas Conversion

    • Loosen the screws A and the appliance has been L.P.G. remove burner set. (Figure 16.1). • Reassemble the front and • Carry out the conversion side panels of the case. type gas, replacing burner injectors correctly. Riva Plus Manual...

  • Page 44: Annual Maintenance

    If you notice dirt on the fins of the primary heat exchanger (9 on page 10), cover the sloping surfaces of the burner (7 on page 10) entirely in a protective layer (sheets of newspaper or similar). Brush out the primary heat exchanger (9 on page 10) with a bristle paintbrush. Riva Plus Manual...

  • Page 45: Cleanig The Burner

    Inspect the venture device inside the Remove the first elbow from the • • outlet of the combustion fan. Make sure horizontal run of the exhaust to the that it is free of any dirt build up or outside. blockage. • Riva Plus Manual...

  • Page 46: Visual Inspection Of Appliance

    Using pliers, remove the spring D moving it • upwards. Disconnect the wirings from the trap. • • Reassemble carrying out the removal operations in reverse order. The trap should be serviced once a year during the annual service. FIG. 17.6 Riva Plus Manual...
  • Page 47 Separate flue vent pipe Separate vent sealing gaskets Separate vent 90 degree elbows Boiler vent adapter hardware Separate flue intake pipe Separate flue intake boiler adapter Separate flue exhaust boiler adapter Exhaust adapter gasket Exhaust restrictor Separate flue intake termination Riva Plus Manual...
  • Page 48 18. Vent Part Spares Cont. Part Description Order Number Coaxial intake pipe Coaxial termination pipe Coaxial union clamp Coaxial union gasket Coaxial exhaust gasket Coaxial boiler adapter gasket Coaxial boiler adapter Coaxial boiler adapter hardware Coaxial union clamp hardware Wall gaskets Riva Plus Manual...
  • Page 49 Roof venting intake adapter Roof venting intake gasket Roof venting boiler adapter exhaust gasket Roof venting boiler adapter Roof venting boiler adapter hardware Roof venting boiler adapter gasket For any spare parts, please contact QHT Inc. at 800-501-7697. Riva Plus Manual...
  • Page 50 Riva Plus Manual...

  • Page 51: Installer Notes

    Serial No._______________ Original Purchaser: Installer: ___________________________ _______________________ ___________________________ _______________________ _______________________ _____________________________________________________________________ Performance Tests: GROSS STACK TEMPERATURE __________________ ROOM TEMPERATURE (AMBIENT) ________________ NET STACK TEMPERATURE _____________________ __________________ ___________________ SMOKE READING ___________________ COMBUSTION EFFICIENCY _________________ COMMENTS ___________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ Riva Plus Manual...
  • Page 52 *1796213550* 17962.1355.0 4007 (44A4)USA...

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