Wall hung, fanflue, roomsealed, high efficiency gas boiler User manual and Installation instructions Riva Plus HE ERP Models G.C. Appl. No. RIVA PLUS HE 24C ERP 47-583-41 COMBI BOILER RIVA PLUS HE 28C ERP 47-583-42 COMBI BOILER...
Page 2
This allows a gain of useful heat that otherwise would be lost. Biasi UK Ltd is a licensed member of the Benchmark Scheme which aims to improve the standards of installation and commissioning of domestic heating and hot water systems in the UK and to encourage regular servicing to optimise safety, efficiency and performance.
Remember that... The manual must be read thoroughly, so that you will be able to use the boiler in a safe and sensible way; must be carefully kept. It may be necessary for reference in the future. The lighting up must be carried out by competent and responsible engineer. The manufacturer •...
Page 4
On completion of the work, have a professionally qualified person check their efficiency. Repairs (under guarantee) must be carried out only by a Biasi an approved engineer, us- ing genuine spare parts. Thus do no more than switching off the boiler yourself (see the instructions).
Page 5
WRAS approved mini expansion vessel must be made. Biasi optional WRAS approved easy fit 15 mm mini shock arrestor kit BI9999 999 can be obtained through your local Biasi stockist.
If you are in any doubts as to the installation or operation of the boiler please read the instruction manuals thoroughly and then if necessary contact Biasi UK for advice and as- sistance.
APPLIANCE DESCRIPTION APPLIANCE DESCRIPTION 9 D.h.w. temperature control knob 10 Appliance operation lights Overview The model and serial number of the boiler Isolation valves are printed on bottom right side. Provide for the installation of a stop valve on the D.c.w. inlet pipe.
APPLIANCE DESCRIPTION Operation lights Three lights (10 in Fig. 1.3) give detailed indication regarding the operation of the boiler. Faulty c.h. temperature The following table gives the relationship probe NTC between each of the possible light combina- Faulty d.h.w temperature tions and their meaning.
Warnings the temperature is below 5 °C. Biasi UK Ltd support the Benchmark ini- Therefore, when the boiler is not lit or used tiative. The Benchmark Checklist is locat- in cold weather, with consequent risk of...
INSTRUCTIONS FOR USE • Close the valves and remove the filling flash every 2 seconds (operating boiler). loop. If you experience any difficulty with the operation of the boiler, switch off the boil- er immediately at the fused spur isolation switch and contact your Installer or an approved Service Engineer.
INSTRUCTIONS FOR USE the gas flow at the burner according to the boiler can be varied from a minimum of about thermal demand in the system. So it is usual 35°C to a maximum of about 55°C (Fig. 2.8), to see the burner lit at the minimum level for by turning the temperature control knob 9.
INSTRUCTIONS FOR USE switch. • Shut off the gas supply cock 14 and the valves for the water circuits fitted under the boiler (Fig. 2.11). • Empty the water circuits, if necessary, as shown in section General access and emptying hydraulic circuits in the service manual.
Page 14
INSTRUCTIONS FOR USE D Increase “+” setting button ON setting and confirm by pressing the “en- E Decrease “-” setting button ter” button C. Proceed in the same way for F On-off button other settings. G Time display Setting example shown in Fig. 2.15: H ON-OFF display ON time 7.45.
INSTRUCTIONS FOR USE Press the “enter” button C until the display that the current state of operation has been shows the setting to be modified or deleted. forced. The time setting can be modified now by To delete the timed delay setting, set the mode selector switch A in the TIMER posi- pressing button D or E and the operation can be switched on or off by pressing the button...
Page 16
INSTRUCTIONS FOR USE Display and control panel Set the OFF time as explained above for the A Mode selector switch ON setting and confirm by pressing the “OK” B Reset button button C. Proceed in the same way for other C OK button settings.
INSTRUCTIONS FOR USE the display. Press the button A until the display shows Press the “OK” button C until the display the symbol AUTO. shows the setting to be modified or deleted. The ON-OFF display H flashes indicating The time setting can be modified now by that the current state of operation has been pressing button D or E and the operation can forced.
Page 18
INSTRUCTIONS FOR USE Fig. 2.27 Setting the switching time and day (or days) 20 memory locations are available, corre- sponding to 10 on-off sequences. Fig. 2.26 Set the mode selector switch A to the C1 po- Display and control panel: sition.
Page 19
INSTRUCTIONS FOR USE of the active day or group of days. Press the button (or the buttons) G corre- sponding to the day (or days) for which it is intended to apply the modification. The cor- responding day display stops flashing and a Fig.
INSTRUCTIONS FOR USE The time delay can be set within the follow- ing ranges: 1 to 23 hours with steps of 1 hour 1 to 27 days with steps of 1 day The time delay setting is activated by moving the switch A to the AUTO position.
Page 21
INSTRUCTIONS FOR USE Current time 16.30, day Thursday. Activating the timed settings The current time and day appears in the dis- play. The ON-OFF display J indicates the current state of operation (according to the settings). Fig. 2.34 Setting the switching time and day (or days) 28 memory locations are available, corre- Fig.
Page 22
INSTRUCTIONS FOR USE responding day display stops flashing and a The time delay can be set within the follow- new switching time can be set or deleted. ing ranges: The time setting can be modified now by 1 to 23 hours with steps of 1 hour pressing button D or E and the operation can 1 to 27 days with steps of 1 day be switched on or off by pressing the button...
USEFUL ADVICE USEFUL ADVICE the obstruction by pouring hot water over the exposed pipe an cleaning any blockage Central Heating from the end of the pipe. If this fails to remedy the problem the assis- For reasonably economical service install a room thermostat.
USEFUL ADVICE Do not carry out cleaning of the appliance If noises due to air bubbles are heard and/or its parts with readily flammable sub- during operation... stances (for example petrol, alcohols, naph- You should check that the pressure on the tha, etc.).
Page 25
USEFUL ADVICE If water should occasionally leak from the boiler... Shut off the valves positioned under the boiler (Fig. 2.11 on page 13) and call an Au- thorised Service Centre Engineer. If the left appliance operation light 10 (Fig. 3.3) flashes very quickly the boiler is detecting a fault.
TECHNICAL INFORMATION Main diagram Fig. 4.2 11 Condensate drain pipe 18 Air pressure sensor test points 12 C.h. return valve 19 Air pressure sensor 13 D.c.w. inlet valve 20 Flue temperature probe NTC 14 Gas inlet valve 21 Condensing heat exchanger 22 Safety thermostat 15 D.h.w.
Page 28
TECHNICAL INFORMATION 25 Main circuit drain valve 26 C.h. pressure relief valve 27 Automatic air purger valve 28 Pump 29 D.h.w. flow switch 30 Modulation gas valve 31 Modulation operator 32 Gas valve outlet pressure test point 33 Gas valve inlet pressure test point 34 D.h.w.
TECHNICAL INFORMATION Hydraulic specifications Expansion vessel The hydraulic specifications in Fig. 4.3 rep- Note: this boiler is designed for opera- resent the pressure (available head for the tion only in a sealed central heating sys- tem. central heating system) as a function of the flow rate.
TECHNICAL INFORMATION Technical data mod. Riva Plus HE 24C ERP Heat input Domestic hot water 25,0 Min/Max temperature settings °C 35 - 55 Nominal net (ch - dhw) BTU/h 85304 1000 Maximum pressure 27,8 Nominal gross (ch - dhw) BTU/h 94687 Minimum pressure Minimun net ch - dhw...
Page 31
TECHNICAL INFORMATION Ø mm Max. gas pressures at the burner Gas restrictors references N° /100 1340 Natural G20 Natural G20 mbar 13,4 Butane G30 2760 Butane G30 Propane G31 mbar 27,6 3550 Propane G31 Electrical data mbar 35,5 Voltage Min. gas pressures at the burner Frequency Natural G20 Nominal Power consumption...
Page 32
TECHNICAL INFORMATION contents - ch dhw Nominal heat input 25,0 (A) (E) content with gas G20 content with gas G30 G31 Minimum heat input (A) (E) content with gas G20 content with gas G30 G31 Other specifications Height Width Depth Weight (dry) 36,8 Water volume in the boiler (up to 1...
Page 33
TECHNICAL INFORMATION Model(s): Riva Plus HE 24C ERP Condensing boiler: Low-temperature boiler (**): B1 boiler: Cogeneration space heater: If yes, equipped with a supplementary heater: Combination heater: Item Symbol Value Unit Item Symbol Value Unit Seasonal space heating Rated heat output η...
TECHNICAL INFORMATION Technical data mod. Riva Plus HE 28C ERP Heat input Domestic hot water 29,0 Min/Max temperature settings °C 35 - 55 Nominal net (ch - dhw) BTU/h 98952 1000 Maximum pressure 32,2 Nominal gross (ch - dhw) BTU/h 109837 Minimum pressure Minimun net ch - dhw...
Page 35
TECHNICAL INFORMATION Max. gas pressures at the burner Ø mm Gas restrictors references N° /100 1330 Natural G20 Natural G20 mbar 13,3 Butane G30 2780 Butane G30 Propane G31 mbar 27,8 3550 Propane G31 Electrical data mbar 35,5 Voltage Min. gas pressures at the burner Frequency Natural G20 Nominal Power consumption...
Page 36
TECHNICAL INFORMATION contents - ch dhw Nominal heat input 29,0 (A) (E) content with gas G20 content with gas G30 G31 Minimum heat input (A) (E) content with gas G20 content with gas G30 G31 Other specifications Height Width Depth Weight (dry) 37,7 Water volume in the boiler (up to 1...
Page 37
TECHNICAL INFORMATION Model(s): Riva Plus HE 28C ERP Condensing boiler: Low-temperature boiler (**): B1 boiler: Cogeneration space heater: If yes, equipped with a supplementary heater: Combination heater: Item Symbol Value Unit Item Symbol Value Unit Seasonal space heating Rated heat output η...
GENERAL REQUIREMENTS GENERAL REQUIREMENTS cordance with the relevant requirements of the current Gas Safe (Installation & Use) Regula- tions, the Local Building Regulations, the cur- rent I.E.E. Wiring Regulations, the Regulations and by-laws of the local water undertaking, and in Scotland, in accordance with the Build- ing Standards (Scotland) Regulation.
GENERAL REQUIREMENTS This appliance is not suitable for external instal- C Below eaves lation. D Below balconies* E Below car port roof F From vertical drain pipes and soil Flue system pipes The provision for satisfactory flue termination G From internal corners** must be made as described in BS 5440 part 1.
GENERAL REQUIREMENTS able both to the boiler and the other appliance To avoid condensate being trapped: when they are in use at the same time. • the drain pipe should be run with a fall of at Pipework must be of adequate size. Pipes of least 2.5°...
GENERAL REQUIREMENTS A Boiler (8-10 mm) it may be necessary to fit an exter- E Sink nal by-pass to facilitate correct operation of the F Open end of condensate drainage pipe di- boiler. rect into gully below grating but above water The fitting of an external bypass helps to pre- level vent and limit system noise.
GENERAL REQUIREMENTS Filling of this manual. A method for initially filling the system and re- placing water lost during servicing must be pro- D.h.w. circuit (scale protection) vided and it must comply with local water au- In areas where the water is ’hard’ (i.e. more than thority regulations.
INSTALLATION INSTALLATION Precautions for installation following prescriptions Warnings must be respected for installa- The use of gas appliances is tion: subject to statutory control; it is essential to observe the current regulations and laws in force • The boiler must be fixed to a strong wall. (see also chapter 5).
INSTALLATION Overall dimensions • If the boiler is installed outside, cover the appliance to protect it against the ele- The boiler respects the following dimen- ments and add some special anti-freeze sions: (neutralised) to the c.h. system. ø80 ø80 • Before installing the boiler on an existing c.h.
INSTALLATION Joints charge pipework. • Fit the condensate drain 11 (Fig. 6.4) in the Pipe sizes air brake connected to the drainage pipe- Functions (o.d) work. See also section "Condensate drain" Gas, c.h. return, c.h. flow ø 22 to page 40. D.c.w.
INSTALLATION there is no sag in the flue pipe and a mini- Vertical kit with 90° elbow (Fig. 6.6 B) mum fall of 1,5 deg. (25 mm per metre) over Co-axial 60/100 mm. the whole length towards the boiler is en- Supplied with a straight flanged adapter a sured.
Page 47
INSTALLATION supply pipe from the pipe that discharges Two restrictors with different size are the exhaust gasses. Consequently it is pos- supplied with the twin pipe kit and have sible to extend the flue system to a greater to be installed between the boiler and the air intake adapter (Fig.
INSTALLATION dimensions of the ducts “a” and “b” of Fig. 6.11. Type C32 ”a” vertical length (m) 90° =--- 1 m max =8,5 m ø 125 45° =--- 0,5 m Allowed values Fig. 6.10 Pluming kit (Fig. 6.11) (Fig. 6.11) Co-axial ø...
Page 49
INSTALLATION Fig. 6.15 Fig. 6.13 For the electrical connection to the boiler • Remove the side panels or move the low- use electric wire switch conform to the cur- er part of the side panels as indicated in rent regulations, with flexible cord, each Fig.
INSTALLATION To the external To the fused control device spur isolation switch Fig. 6.16 • Connect the room thermostat between ter- minals 1 and 3 as shown in Fig. 6.17. Fig. 6.18 Do not connect live wires to ter- 6.10 External frost protection minals to which the room ther- mostat must be connected.
COMMISSIONING COMMISSIONING Warnings The commissioning of this boiler and system must only be undertaken by a professionally qualified person in ac- cordance with the requirements of the Gas Safe Installation and Use Regula- tions and be approved by Gas Safe. Open position Fig.
Page 52
COMMISSIONING switch. The appliance operation light 10 heard to flow; do not open fully. will flash every 4 seconds. • Open each radiator air vent starting at the lowest point of the system and close • Turn the function selector 8 as in Fig. 7.3. it only when clear water, free of bubbles, The appliance operation light 10 will flash flows out.
COMMISSIONING every 4 seconds. bow, pour the water through the flue sam- pling point (Fig. 7.6) Sampling points Flue exhaust Fig. 7.4 If during the ignition attempt period the Fig. 7.6 boiler fails to light, the full sequence control p.c.b. will go to lockout and the lock-out sig- Lighting the boiler nal lamp 6 will appear.
COMMISSIONING moving the electrical connector A (Fig. If during the ignition attempt period the 7.8). boiler fails to light, the full sequence control p.c.b. will go to lockout and the lock-out sig- nal lamp 6 will appear. To reset the boiler press and release the boiler reset button 7.
COMMISSIONING justment procedure is given in the Gas trolled then checks should be made to: Valve section of the service manual. If - the flue installation and termination. maximum and/or minimum gas pres- - that the flue gasket as shown in Fig. 6.5 sures are adjusted then the ignition gas on page 45 is in place.
COMMISSIONING 7.12 Check pump operation/pump est possible fuel economy. release Explain the function and use of the function selector. The pump electronic control circuit automati- Explain and demonstrate the function of cally releases the pump. time and temperature controls (if fitted). Connect the boiler to the mains .
GAS CONVERSION GAS CONVERSION • Re-assemble the burner, the front panel of the combustion chamber. Warnings • Switch on the appliance at the mains iso- The commissioning of this boiler and lating spur. system must only be undertaken by Safe- •...
Page 58
GAS CONVERSION rent setting by keeping the reset button 7 Factory setting = Natural gas (as illustrated) pressed for more than 5 seconds. The lamps 10 will flash a number of times correspond- ing to the setting of the knob 9 in Fig. 8.5. L.P .G.
MAINTENANCE MAINTENANCE Warnings The procedures detailed in this chapter must be carried out only by a Gas Safety Registered Engineer. Thus you are advised to contact an Author- ised Service Agent. For Ireland (IE), the servicing work must be carried out by a competent Person. For efficient and continuous operation of the boiler you are advised to have, at least once a year, maintenance and cleaning done by...
MAINTENANCE Combustion analysis check bustion chamber. • Brush out the burner with a bristle paint- If it is necessary to carry out a combustion brush. analysis remove the plugs indicated in Fig. 9.1. Reference figures are given in the sections Checking the flue "Technical Data"...
MAINTENANCE BENCHMARK COMMISSIONING AND SERVICING SECTION It is a requirement that the boiler is installed and commissioned to the manufacturers instruc- tions and the data fields on the commissioning checklist completed in full. To instigate the boiler guarantee the boiler needs to be registered with the manufacturer within one month of the installation.
GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failuretoinstallandcommissionaccordingtothemanufacturer’sinstructionsandcompletethisBenchmarkCommissioningChecklistwillinvalidatethe warranty.Thisdoesnotaffectthecustomer’sstatutoryrights.
SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider BeforecompletingtheappropriateServiceRecordbelow,pleaseensureyouhavecarriedouttheserviceasdescribedinthemanufacturer’sinstructions. Alwaysusethemanufacturer’sspecifiedsparepartwhenreplacingcontrols. SERVICE 01 SERVICE 02 Date: Date: Engineername: Engineername: Companyname: Companyname: TelephoneNo: TelephoneNo: GassaferegisterNo: GassaferegisterNo: Atmax.rate: COppm AND CO ²...
Page 64
*1796225130* 17962.2513.0 0616 64A5 Biasi UK Ltd Commercial Road Leamore Enterprise Park WALSALL WS2 7NQ Sales Tel. 01922 714600 Tech. Service Tel. 01922 714636 www.biasi.co.uk...
Need help?
Do you have a question about the RIVA PLUS HE 24C ERP and is the answer not in the manual?
Questions and answers