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Riva
Riva
PLUS COMBI
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.
Quincy Hydronic Technology, Inc.
3560 Lafayette Road
Bldg. 2, Unit A
Portsmouth, NH 03801
Phone: 603-334-6400
Fax: 603-334-6401
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Summary of Contents for Riva PLUS COMBI
- Page 1 Riva Riva PLUS COMBI 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 Combi 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 affi...
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Page 3: Table Of Contents
Connection to the Electricity Supply 12.2 Room Thermostat Connection 12.3 Relay Panel Control Connection 12.4 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 30-33 RIVA PLUS COMBI MANUAL... -
Page 4: Warnings
Checking the press. in the exp.vassel 17.8 Visual Inspection of Appliance 17.9 Gas Pressures and Soundness 17.10 Cleanig the primary heat exchanger 17.11 Cleanig the domestic hot water exchanger 17.12 Condensate trap 17.13 Vent Part Spares 44-46 Installer Notes RIVA PLUS COMBI 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 COMBI 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 SERVICE COMPANY OR THE GAS COMPANY OR THE FIRE DEPARTMENT. ONLY QUALIFIED, LICENSED SERVICE CONTRACTORS SHOULD PERFORM WORK ON YOUR BIASI RIVA COMBI BOILER. RIVA PLUS COMBI MANUAL...
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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 COMBI MANUAL... -
Page 8: General Information
1. General Information The Riva Plus Combi 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 components listed on page 11. - Page 9 D.h.w. ΔT 45 F (25 C) 116.0 (0/2000ft) D.h.w. ΔT 54 F (30 C) D.h.w. ΔT 63 F (35 C) Nominal heat fl ow rate 110.2 (2000/4500ft) D.h.w. ΔT 72 F (40 C Min Exhaust temperature °F Max Exhaust temperature °F RIVA PLUS COMBI MANUAL...
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Page 10: Parts List
39. D.h.w fl ow limiter 19. Central heating pressure relief valve 40. Domestic hot water temp.probe NTC 20. Primary circuit fl ow switch 41. Domestic cold water inlet valve 21. Main circuit drain cock 42. D.h.w. outlet pipe 10 RIVA PLUS COMBI MANUAL... -
Page 11: Internal Piping And Parts List
4. 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. RIVA PLUS COMBI MANUAL... -
Page 12: Electric Diagrams
5. Electric Diagrams 12 RIVA PLUS COMBI MANUAL... -
Page 13: Sequence Of Operation
Flame presence? Closes gas valve Stops fan End of ignition period? Interrupts ignitor Boiler lockout Interrupt igniter Gas valve open Reset push – button pressed Close gas valve Flame presence? Safety thermostat Opens the circuit? Flame presence? RIVA PLUS COMBI MANUAL... -
Page 14: Installation Location
CO detector in the boiler room. 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 COMBI MANUAL... -
Page 15: Exhaust Pipe Location
9. The vent should not be situated so that the fl ue gases are directed towards brickwork,siding, or other construction , in such a manner that may cause damage from heat or condensate from the fl ue gases RIVA PLUS COMBI 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. Figure 8.1 16 RIVA PLUS COMBI MANUAL... -
Page 17: Venting
If the Biasi Riva Plus Combi 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 connected to it. -
Page 18: Venting 9
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. 18 RIVA PLUS COMBI MANUAL... -
Page 19: Restrictor Sizing
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 pages. -
Page 20: 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. 20 RIVA PLUS COMBI MANUAL... - Page 21 • 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 COMBI 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. 22 RIVA PLUS COMBI MANUAL...
- Page 23 • 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 COMBI MANUAL...
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Page 24: Pipe Connections
10. Pipe Connections The Riva Plus Combi 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), 2 - 1/2” (F,G in fi gure 10.1) located in a plastic bag in the boiler package. -
Page 25: Gas Pipe Connections
½ psi(3.5 kPa). WARNINGS DO NOT USE A FLAME FOR CHECKING GAS LEAKS. RIVA PLUS COMBI MANUAL... -
Page 26: Electrical Connections/Wiring
(as shown in fi gure 12.5) keeping the same connections for the live wire and the neutral wire. WARNING Note: Do not connect live wires to thermostat terminals 1-3. Figure 12.5 26 RIVA PLUS COMBI MANUAL... -
Page 27: Room Thermostat Connection
• Connect the dry contact switch to termi- Figure 12.8 nals 1 and 3 shown in Fig. 12.9. • When connecting any type of relay con- trol, the jumper J in Fig. 12.8 must be re- moved. RIVA PLUS COMBI MANUAL... -
Page 28: Zone Valve Microswitch Connection
• Route the electrical supply cord and the external control cord as illustrated in Fig. 12.12. Figure 12.12 • Lock the cords in place with the fl exible cord clamps. • Replace the control panel reversing the steps on page 23. 28 RIVA PLUS COMBI MANUAL... -
Page 29: 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 COMBI MANUAL... -
Page 30: Piping
In most circumstances 1 ¼” piping will be the best choice. When the boiler is piped in this way, the external circulator will not have any hydraulic effect on the Riva Plus Combi. This is essential to ensure that the fl ow switch will operate properly. Figure 14.1 The second method is a hydraulic separator. - Page 31 It is very important to use an hydraulic separator before secondary circulators. All external piping components are to be supplied by the installer. It is very important to use a hydraulic separator before secondary circulators. Figure 14.3 RIVA PLUS COMBI MANUAL...
- Page 32 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. Figure 14.4 32 RIVA PLUS COMBI MANUAL...
- Page 33 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. Figure 14.5 RIVA PLUS COMBI MANUAL...
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Page 34: Commissioning
• Turn on the electricity supply to the boiler, switching on the circuit breaker switch. The ap- pliance operation light A will fl ash every 4 seconds. • Turn the function selector B as in Fig. 15.3. The appliance operation light A will fl ash every 2 seconds. Figure 15.3 34 RIVA PLUS COMBI MANUAL... -
Page 35: Checking The Gas Pres. At The Burner
Section 2 on page 10 (gas pressures at the burner). • Check the maximum gas fl ow at the gas meter and compare the value indicated in the section 2 on page 10 (gas fl ow rate). RIVA PLUS COMBI MANUAL... -
Page 36: Adjustment Of The Gas Pressure
(D on Figure 15.3). To reset the boiler turn the knob B (fi gure 15.3) on the 0 position and then press and release the boiler reset but- ton (C on Figure 15.3). 36 RIVA PLUS COMBI MANUAL... -
Page 37: 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 (fi gure 15.5). • Reassemble the front pannel of the case. RIVA PLUS COMBI MANUAL... -
Page 38: 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. 38 RIVA PLUS COMBI MANUAL... -
Page 39: 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 RIVA PLUS COMBI MANUAL... -
Page 40: Gas Conversion
• Loosen the screws D and remove the ser- sion kit) indicating the type of gas, and the vice panel (fi gure 16.2) gas pressures to which the appliance has been set. • Reassemble the front and side panels of the case. 40 RIVA PLUS COMBI MANUAL... -
Page 41: 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 fi ll valve (28 on Section 4) Figure 17.3 RIVA PLUS COMBI MANUAL... -
Page 42: Checking The Combustion Fan
• Reinstall the elbow onto the horizontal run of the pipe fi rst by simply pushing the parts together. • Push the vent adapter down onto the top of the boiler and reinstall the four Phillips head screws. 42 RIVA PLUS COMBI MANUAL... -
Page 43: 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 RIVA PLUS COMBI MANUAL... -
Page 44: Vent Part Spares
18. Vent Part Spares For any spare parts, please contact QHT Inc. at 800-501-7697. Figure 18.1 Description Order Number Twin pipe kit 10999.0393.0 44 RIVA PLUS COMBI MANUAL... - Page 45 18. Vent Part Cont. For any spare parts, please contact QHT Inc. at 800-501-7697. Figure 18.2 Description Order Number Coaxial fl ue kit 10999.0387.0 RIVA PLUS COMBI MANUAL...
- Page 46 18. Vent Part Cont. For any spare parts, please contact QHT Inc. at 800-501-7697. Figure 18.3 Part Description Order Number Coaxial fl ue kit 10999.0387.0 46 RIVA PLUS COMBI MANUAL...
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Page 47: Installer Notes
Installer: Original Purchaser: ________________________ ___________________________ ________________________ ___________________________ ________________________ ___________________________ _______________________________________________________________________ Performance Tests: GROSS STACK TEMPERATURE __________________ ROOM TEMPERATURE (AMBIENT) ________________ NET STACK TEMPERATURE _____________________ __________________ ___________________ SMOKE READING ___________________ COMBUSTION EFFICIENCY _________________ COMMENTS ___________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ RIVA PLUS COMBI MANUAL... - Page 48 17962.1481.0 3808 (52A4)USA REV. 1209...
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