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QHT Riva Plus Installation & operation instructions

Manual is about: WALL HUNG GAS BOILER FOR CENTRAL HEATING SUPPLY

Summary of Riva Plus

  • Page 1

    Boiler inst alla tion, opera tion instructions wall hung gas boiler for central heating supply please read instructions carefully save for future reference — 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 ...

  • Page 2

    2 riva plus manual dear customer: thank you for buying a biasi riva plus boiler system. The riva plus is a high effi ciency condensing, wall mounted gas boiler which provides central heat supply water. We realize that it is not possible to answer all questions about the riva boiler system in this ma...

  • Page 3: Table Of Contents

    Riva plus manual 3 table of contents section title section number page number warnings - 5-6 important information - 7 general information 1 8 technical information (m135.30cr) 2 8-9 parts list 3 10 internal piping and parts list 4 11 electric diagrams 5 12-13 sequence of operation 5.1 13 installati...

  • Page 4: Table Of Contents

    4 riva plus manual table of contents section title section number page number commissioning 15 34-39 initial filling of the system 15.1 34 lightning the boiler 15.2 34 checking the gas pres. At the burner 15.3 35 adjustment of the gas pressure 15.4 36 checking the ignition device 15.5 36 checking th...

  • Page 5: Warning

    Riva plus manual 5 warning danger boiler is certifi ed as an indoor appliance. Do not install boiler outdoors or locate where it will be exposed to freezing temperatures. Caution: do not store or use fl ammable materials, chemicals or fl ammable liquids, especially gasoline, in the vicinity of this ...

  • Page 6

    6 riva plus manual any appliance that burns natural gas, propane gas, fuel oil, wood or coal is capable of pro- ducing carbon monoxide (co). Carbon monoxide (co) is a gas which is odorless, colorless and tasteless but is very toxic. Co is lighter than air and thus may travel throughout the building....

  • Page 7

    Riva plus manual 7 important information please read this page carefully. • all boilers must be installed in accordance with national, state and local plumbing, heating and electrical codes and ordinances, as well as the regulations of the serving electrical, water and gas utilities. • all systems s...

  • Page 8: 1. General Information

    8 riva plus manual 1. General information the riva plus is a high effi ciency condensing, wall mounted gas boiler which provides central heat. The boiler features a gas valve which modulates the energy input from 49,476 btu/h to 116,008 btu/h. The boiler is shipped fully assembled with the component...

  • Page 9

    Riva plus manual 9 2. Technical information cont. Energy capacity nominal heat input (0/2000ft) mbh 116.0 nominal heat input (2000/4500ft) mbh 110.2 minimum heat input mbh 49.5 maximum useful output (0/2000ft) mbh 102.0 maximum useful output (2000/4500ft) mbh 97.2 minimum useful output mbh 41.6 gas ...

  • Page 10: 2. Parts List

    10 riva plus manual 2. Parts list primary components : 1 pump 2 pump vent plug 3 automatic air purger valve 4 modulation gas valve 5 flame-detecting electrode 6 ignition electrodes 7 burner 8 combustion chamber 9 primary heat exchanger 10 fan 11 air pressure switch 12 air switch pres. Test points 13...

  • Page 11

    Riva plus manual 11 3. Internal piping & parts list note: pressure relief valve (#19) should be piped to a drain or to the fl oor as lose as pos- sible to a drain..

  • Page 12: 4. Electric Diagrams

    12 riva plus manual 4. Electric diagrams.

  • Page 13

    Riva plus manual 13 5. Electric diagrams cont. Is primary circuit temp higher than selected temp request for heat from thermostat circulator off ignition device off starts the circulator supplies the ignition device yes no yes no is the boiler in lockout? Air pressure switch open? Fan starts air pre...

  • Page 14: 5. Installation Location

    14 riva plus manual 5. Installation location the installation location chosen must: • comply with all clearances listed below. • provide suitable location for the exhaust and intake venting. • not be installed in an unheated space. • comply with all local codes and standards. Note: dimensions shown ...

  • Page 15: 6.  Exhaust Pipe Location

    Riva plus manual 15 6. Exhaust pipe location caution external vent surfaces are hot. It is responsability of the homeowner to keep the vent terminal clear of snow and ice note: use only listed components supplied with the boiler. Surface discoloration of the building may occur due to improper instal...

  • Page 16: 7. Mounting Bracket

    16 riva plus manual 7. Mounting bracket after a suitable installation location is chosen, verify that the mounting wall is properly braced and strong enough to support the 110 pound weight of the unit when fi lled with water. Note: the boiler shall be installed such that the gas ignition system comp...

  • Page 17: 8. Venting

    Riva plus manual 17 8. Venting the riva is a mechanical draft, side wall vented boiler. There are two side wall fl ue options available – separate and coaxial. The coaxial option has one confi guration shown on the next page. The separate option has two possible confi gurations shown on the followin...

  • Page 18: Of Massachussetts

    18 riva plus manual the commonwealth of massachusetts requires compliance with regulation 248 cmr 4.00 and 5.00 for installation of through – the – wall vented gas appliances as follows: (a) for direct-vent appliances, mechanical-vent heating appliances or domestic hot water equipment, where the bot...

  • Page 19: 9. Venting Cont.

    Riva plus manual 19 9. Venting cont. The riva is a mechanical draft, side wall vented boiler. There are two fl ue options available - separate and coaxial. The coaxial option has one confi guration shown on the next page. The separate option has two possible confi gurations shown on the following pa...

  • Page 20: 9. Venting Cont.

    20 riva plus manual 8.1 choice of fl ue: the following fl ue kits are available for connecting to the boiler: a standard coaxial horizontal fl ue kit (exhaust & intake outside) figure 8.1 (coaxial 2.4/4.0 inches – nominal lenght 3.3 ft) it can be fi tted to allow discharge to the rear or either side...

  • Page 21: 9. Venting Cont.

    Riva plus manual 21 9. Venting cont. B standard separate horizontal fl ue kit (exhaust & intake outside) figure 8.2 (twin pipe  3.25 in) various twin (split) pipes kits and optional accessories (elbows) are available to assist in the termination of the fl ue where the boiler is installed in a locat...

  • Page 22: 9. Venting Cont.

    22 riva plus manual 9. Venting cont. E alternative separate kit (exhaust & intake outside) figure 8.3 (twin pipe  3.25 in) these kits allow for separation of the air supply pipe from the pipe that discharges the exhaust gasses. Consequently it is possible to extend the fl ue system to a greater dis...

  • Page 23: 9. Venting Cont.

    Riva plus manual 23 9. Venting cont. F standard vertical-roof kit (exhaust & intake outside) figure 8.4 (vertical pipe  3.1 /  4.9 in) this kit allows vertical termination of the fl ue pipe through the roof. The kit is 1.2 min length. Extension pieces (co--axial) are also available which allows th...

  • Page 24: 9. Pipe Connections

    24 riva plus manual 9. Pipe connections the riva boiler is supplied with a 3/4” stainless steel gas pipe (a in fi gure 10.1), 2 - 3/4” copper pipe (c,d in fi gure 10.1), located in a plastic bag in the boiler package. Figure 9.1 e a) stainless steel gas pipe b) main circuit drain cock c) c.H. Supply...

  • Page 25: 10. Gas Pipe Connections

    Riva plus manual 25 10. Gas pipe connections gas supply piping is to be sized and installed properly in order to provide a supply of gas suffi - cient to meet the maximum demand without undue loss of pressure between the meter and the boiler. Consult with the national fuel gas code ansi z223.1 for p...

  • Page 26: Warning

    26 riva plus manual 11. Electrical connections/wiring figure 11.1 removing front panel: • remove the front panel by removing screws a and sliding the front panel up and away from the boiler removing side panel: • remove screws b figure 11.2 a a b b c c b b removing control panel: • remove screws c. ...

  • Page 27

    Riva plus manual 27 12. Electrical connections/wiring cont. 11.3 room thermostat connection: • the room thermostat must be connected to the terminal block situated next to the control panel. Figure 11.6 • any external controls and connection lines must be rated at 120 vac but un- der no circumstance...

  • Page 28

    28 riva plus manual 11.5 zone valve micro switch connection: • the zone valve micro switch must be con- nected to the terminal block situated next to the control panel. Figure 11.10 • when connecting the zone valve switch, the jumper j in fig. 12.10 must be re- moved. Figure 11.11 • connect the micr...

  • Page 29: 12. Circulator  Sizing

    Riva plus manual 29 12. Circulator sizing 12.1 circulator capacity as a function of fl ow rate: figure 12.1 the hydraulic specifi cation in fig 13.1 represent the pressure (available head for the central heating system) as a function of the fl ow rate. The pressure loss due to the in- ternal piping ...

  • Page 30: 13. Piping

    30 riva plus manual 13. Piping all external piping components are to be supplied by the installer. It is very important to use a primary secondary piping scheme when an external circulator will be used. Also, when the boiler is piped in a primary secondary manner, it is necessary to us the central h...

  • Page 31: 14. Piping  Cont.

    Riva plus manual 31 13.1 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. 14. Piping cont..

  • Page 32: 14. Piping  Cont.

    32 riva plus manual 14. Piping cont. 13.2 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..

  • Page 33: 14. Piping  Cont.

    Riva plus manual 33 14. Piping cont. 13.3 manifold piping with zone valves (shown conn. To radiators): all external piping components are to be supplied by the installer..

  • Page 34: 14. Commissioning

    34 riva plus manual 14. Commissioning 14.1 initial fi lling of the system: • remove the front panel of the case. • unscrew the cap on the automatic air purger valve 3 (fig 15.1) one full turn and leave open permanently. Figure 14.1 • open the installer supplied automatic fi ll valve between the cold...

  • Page 35: 15. Commissioning  Cont.

    Riva plus manual 35 15. Commissioning cont. 14.3 checking the gas pressure at the burner: this boiler has been tested to the highest quality control standards. The maximum and minimum gas pressures are already set during this quality control process however the checking procedure must be followed to...

  • Page 36: 15. Commissioning  Cont.

    36 riva plus manual 15. Commissioning cont. 14.4 adjustment of the gas pressure: • remove the front panel of the case. • take off the lid of the sealed chamber. • open the gas valve inlet pressure test point (16 in fig. 15.5) at the valve input, connect a suitable pressure gauge and check the gas pr...

  • Page 37: 15. Commissioning  Cont.

    Riva plus manual 37 15. Commissioning cont. 14.6 checking the burner ignition: • turn the boiler off. • open the gas valve outlet pressure test point 15 (fi gure 15.5) and connect the gauge. • turn the boiler on positioning the function se- lector b in the position shown in fi gure 15.7 and ensure t...

  • Page 38: 15. Commissioning  Cont.

    38 riva plus manual 15. Commissioning cont. 14.8 labels placement: figure 14.10 warning: the installation is not complete unless labels supplied are placed on the boil- er as shown in figure 15.10. All the labels supplied with the boiler are numbered for reference. According to figure 15.10 place al...

  • Page 39: 15. Commissioning  Cont.

    Riva plus manual 39 15. Commissioning cont. 14.9 checking the fl ue system and combustion: • the fl ue system should be visually checked for soundness. Check all clamps, gaskets and fi xings are secure and tight. • ensure that the fl ue terminal is sited correctly in accordance with the fl ue fi tti...

  • Page 40: 15. Gas  Conversion

    40 riva plus manual 15. Gas conversion warnings: procedures to adapt the boiler to the type of gas available must be car- ried out by a competent and responsible person. Components used to adapt it to the type of gas available must be genuine parts only. Procedures: • check that the gas cock (30 on ...

  • Page 41: 16. Annual  Maintenance

    Riva plus manual 41 16. Annual maintenance 16.1 warnings: the procedures detailed in this chapter must be carried out only by a professionally qualifi ed person. Thus you are advised to contact an authorised service agent. For effi cient and con- tinuous operation of the boiler you are advised to ha...

  • Page 42

    42 riva plus manual 17. Annual maintenance cont. 16.4 cleaning the primary heat exchanger: • take off the front panel of the case, then the sealed chamber lid and the front panel of the combustion chamber. If you notice dirt on the fi ns of the primary heat exchanger (9 on page 10), cover the slopin...

  • Page 43

    Riva plus manual 43 • make sure the seals are properly seated in the female ends of the vent pipe with the fi ns facing the male end of the pipe. • reinstall the elbow onto the horizontal run of the pipe fi rst by simply pushing the to check the pressure at the venturi device, use the test points (1...

  • Page 44: 17. Vent Part Spares

    44 riva plus manual 17. Vent part spares 17.1 separate venting: description order number twin pipe kit 10999.0393.0 for any spare parts, please contact qht inc. At 800-501-7697..

  • Page 45: 18. Vent Part Spares Cont.

    Riva plus manual 45 17.2 coaxial venting: description order number coaxial fl ue kit 10999.0387.0 18. Vent part spares cont. For any spare parts, please contact qht inc. At 800-501-7697..

  • Page 46: 18. Vent Part Spares Cont.

    46 riva plus manual 17.3 roof venting part description order number a roof fl ue kit 10999.0392.0 18. Vent part spares cont. For any spare parts, please contact qht inc. At 800-501-7697..

  • Page 47: 18. Installer  Notes

    Riva plus manual 47 18. Installer notes system checkout: boiler model no. ___________________ original purchaser: ___________________________ ___________________________ ___________________________ serial no.______________________ installer: ________________________ ________________________ ________...

  • Page 48

    17962.1355.1 3808 (52a4)usa rev. 1209.