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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
HEAT ONLY
Distributed By:
Quincy Hydronic Technologies, Inc.
3560 Lafayette Road
Portsmouth, NH 03801
Phone: 603-334-6400
Fax: 603-334-6401
RIVA HEAT ONLY MANUAL - REV B
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Summary of Contents for QHT Riva
- Page 1 — Installation and service must be performed by a qualified installer, service agency or the gas supplier. Manufactured by: Distributed By: Biasi S.p.A. Quincy Hydronic Technologies, Inc. Verona, Italy 3560 Lafayette Road Portsmouth, NH 03801 Phone: 603-334-6400 Fax: 603-334-6401 RIVA HEAT ONLY MANUAL - REV B...
- Page 3 CSA 4.9 and is CSA compliant. This Riva Heating Only 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.
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Page 4: Table Of Contents
Relay Panel Control Connection 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 33-36 Primary-Secondary Piping 14.1 Primary-Secondary with Zone Valves 14.2 RIVA HEAT ONLY MANUAL - REV B... -
Page 5: Warnings
Checking the Pressures. in C.h. Vess. 17.5 Cleanig the Burner 17.6 Checking the Combustion fan 17.7 Checking the Flue 17.8 Visual Inspection of Appliance 17.9 Gas Pressures and Soundness 17.10 Vent Part Spares 46-48 Installer Notes RIVA HEAT ONLY MANUAL - REV B... - 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 HEAT ONLY MANUAL - REV B...
- Page 7 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 HEAT ONLY MANUAL - REV B...
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Page 8: Important Information
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 HEAT ONLY MANUAL - REV B... -
Page 9: General Information
1. General Information The Riva Heat Only is a high efficiency, non-condensing, wall mounted gas boiler which provides central heat. The boiler features a gas valve which modulates the energy input from 44,000 BTU/h to 108,000 BTU/h. The boiler is shipped fully assembled with the components listed on page 11. - Page 10 Minimum Venturi pressure inwc 0.64 Flue pipe diameter 2.25/4 Coaxial 3.25/5 Twin split pipes 3.25/3.25 Nominal heat flow rate 122.8 (0/2000ft) Nominal heat flow rate 116.7 (2000/4500ft) Min Exhaust temperature °F Max Exhaust temperature °F RIVA HEAT ONLY MANUAL - REV B...
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Page 11: Parts List
13. Safety thermostat 29. Backflow preventer 14. Modulation operator 30. Gas supply line cock 15. Gas valve outlet pres. Test point 31. Water supply inlet cock 16. Gas valve inlet pres. Test point RIVA HEAT ONLY MANUAL - REV B... -
Page 12: Internal Piping And Parts List
Pressure Relief Valve (#19) should be piped to a drain or to the floor as close • as possible to a drain. This diagram is a graphical representation only and is not drawn to scale. Do • not use for piping purposes. RIVA HEAT ONLY MANUAL - REV B... -
Page 13: Electric Diagrams
- red gy - grey ye - yellow gnye - green/yellow Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing RIVA HEAT ONLY MANUAL - REV B... -
Page 14: Sequence Of Operation
5.1 Sequence of Operation RIVA HEAT ONLY MANUAL - REV B... -
Page 15: 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. RIVA HEAT ONLY MANUAL - REV B... -
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
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. ø3.1 ø3.1 ø4.0 A&B 0.6 4.5 15.7 13.0 Figure 8.1 RIVA HEAT ONLY MANUAL - REV B... -
Page 18: Venting
9. Venting The Riva is a mechanical draft, side wall vented boiler. There are two side wall flue options available – separate and coaxial. The coaxial option has one configuration shown on the next page. The separate option has two possible configurations shown on the following pages. - 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 HEAT ONLY MANUAL - REV B...
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Page 20: Restrictor Sizing
9. Venting Cont. The Riva is a mechanical draft, side wall vented boiler. There are two flue options available - separate and coaxial. The coaxial option has one configuration shown on the next page. The separate option has two possible configurations shown on the following pages. -
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 HEAT ONLY MANUAL - REV B... - Page 22 • 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 HEAT ONLY MANUAL - REV B...
- 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 HEAT ONLY MANUAL - REV B...
- 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 HEAT ONLY MANUAL - REV B...
- Page 25 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 HEAT ONLY MANUAL - REV B...
- 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 HEAT ONLY MANUAL - REV B...
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Page 27: Pipe Connections
10. Pipe Connections The Riva boiler is supplied with a 3/4” stainless steel gas pipe (A in figure 10.1), 2 - 3/4” copper pipe (C,D in figure 10.1), located in a plastic bag in the boiler package. A) Stainless steel gas... -
Page 28: Gas Pipe Connections
The boiler and its individual shut-off valve must be disconnected from the gas supply piping during any pressure testing of that piping at test pressures in excess of ½ psi. WARNINGS DO NOT USE A FLAME FOR CHECKING GAS LEAKS RIVA HEAT ONLY MANUAL – REV B... -
Page 29: Electrical Connections/Wiring
Note: Do not connect live wires to thermostat terminals 1-3. Power supply terminal block 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 HEAT ONLY MANUAL - REV B... -
Page 30: Room Thermostat Connection
(Fig 12.9). • Connect the dry contact switch to External controls terminals 1 and 3 terminal block shown in Fig. 12.9. Control Block Do 120 VAC Control Not Apply Power Terminal Block Figure 12.8 RIVA HEAT ONLY MANUAL – REV B... -
Page 31: Zone Valve Microswitch Connection
To the external cord clamps. control device To the fused spur isolation switch as illustrated in Fig. • Replace the control 12.12 panel reversing the steps on page 23. Figure 12.12 RIVA HEAT ONLY MANUAL - REV B... -
Page 32: Circulator Sizing
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 HEAT ONLY MANUAL - REV B... -
Page 33: 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 boiler. This is essential to ensure that the flow switch will operate properly. -
Page 34: Primary-Secondary Piping
14. Piping 14.1 Primary – Secondary Piping: All external piping components are to be supplied by the installer. It is very important to use an hydraulic separator before secondary circulators. RIVA HEAT ONLY MANUAL - REV B... - 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 an hydraulic separator before secondary circulators. RIVA HEAT ONLY MANUAL - REV B...
- Page 36 14. Piping Cont. 14.3 Manifold Piping with Zone Valves or Circulators (shown conn. to radiators): All external piping components are to be supplied by the installer. RIVA HEAT ONLY MANUAL - REV B...
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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 HEAT ONLY MANUAL - REV B... -
Page 38: Checking The Gas Pres. At The Burner
If external Important: after the controls are checks all of the test points must be sealed. RIVA HEAT ONLY MANUAL - REV B... -
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 HEAT ONLY MANUAL – REV B... -
Page 40: Checking The Burner Ignition
• Adjust the gas ensure that the room pressure at the burner thermostat is set to to the value according “heat demand”. to the useful c.h. • Loosen screws D and output wanted (Tab. RIVA HEAT ONLY MANUAL - REV B... -
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 HEAT ONLY MANUAL – REV B... -
Page 42: Instructing The User
1.00 1.32 1.89 2.57 3.33 4.22 5.34 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 Tab 15.1 RIVA HEAT ONLY MANUAL - REV B... -
Page 43: Gas Conversion
Gas supply the switch 2 burner 7 (Figure been set. Natural gas 16.1). • Reassemble the front L.P.G. • Carry out the and side panels of the conversion for the case. RIVA HEAT ONLY MANUAL – REV B... -
Page 44: Annual Maintenance
(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 HEAT ONLY MANUAL - REV B... -
Page 45: Cleanig The Burner
17.10 Gas pressures and soundness: Check appliance for gas soundness. Recheck operational pressures and adjust as necessary as described in Section 15.4 page 32 of this manual. RIVA HEAT ONLY MANUAL - REV B... -
Page 46: Vent Part Spares
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 HEAT ONLY MANUAL - REV B... - Page 47 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 HEAT ONLY MANUAL - REV B...
- Page 48 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 HEAT ONLY MANUAL - REV B...
- Page 49 RIVA HEAT ONLY MANUAL - REV B...
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Page 50: Installer Notes
___________________________ _______________________ ___________________________ _______________________ ___________________________ _______________________ _____________________________________________________________________ Performance Tests: GROSS STACK TEMPERATURE __________________ ROOM TEMPERATURE (AMBIENT) ________________ NET STACK TEMPERATURE _____________________ __________________ ___________________ SMOKE READING ___________________ COMBUSTION EFFICIENCY _________________ COMMENTS ___________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ RIVA HEAT ONLY MANUAL - REV B...
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