Biasi Riva Plus HE System ERP 24kw and 28kw User manual

Brand: Biasi

Model: Riva Plus HE System ERP 24kw and 28kw

Category: Water heaters & boilers

Type: User manual

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 24S ERP 41-583-31 SYSTEM BOILER

RIVA PLUS HE 28S ERP 41-583-32 SYSTEM BOILER

- 2 -

WARNING

Congratulations on your choice.

Riva Plus HE ERP are condensing high efciency sealed chamber fan ue gas boilers. They

are fully electronically controlled and have electronic ignition.

The materials they are made of and the control systems they are equipped with give you

safety, a high level of comfort and energy savings to allow you to get the greatest benet out

of independent heating.

Riva Plus HE ERP allow a higher efciency by reducing the ue gas temperature such that

the water vapour formed during the combustion is condensed out.

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, efciency and performance.

Benchmark is managed and promoted by the Heating and Hot water Industry Council. For

more information visit www.centralheating.co.uk.

DANGER: The indications marked with this symbol must be observed to pre-

vent accidents of mechanical or generic origin (e.g.: Injuries or bruises).

DANGER: The indications marked with this symbol must be observed to pre-

vent accidents of electric origin (electrocution).

DANGER: The indications marked with this symbol must be observed to pre-

vent the risk of re or explosion.

DANGER: The indications marked with this symbol must be observed to pre-

vent accidents of heat origin (burns).

ATTENTION: The indications marked with this symbol must be observed to

prevent malfunctioning and/or damage to materials of the appliance or other

objects.

ATTENTION: The indications marked with this symbol are important informa-

tion that must be carefully read.

- 3 -

WARNING

Remember that...

The manual must be read thoroughly, so that you will be able to use the boiler in a safe

and sensible way and must be carefully kept. It may be necessary for reference in the

future.

The lighting up must be carried out by a competent and responsible engineer.

The manufacturer

• disclaims all liability for any translations of the present manual from which incorrect

interpretation may occur;

• cannot be held responsible for non-observance of instructions contained in this manual

or for the consequences of any procedure not specically described.

Please ensure that the installer has fully completed the Benchmark Checklist on the inside

back pages of the installation instructions supplied with the product and that you have signed

it to say that you have received a full and clear explanation of its operation. The installer is

legally required to complete a commissioning checklist as a means of complying with the

appropriate Building Regulations (England and Wales).

All installations must be notied to Local Area Building Control either directly or through a

Competent Persons Scheme. A Building Regulations Compliance Certicate will then be

issued to the customer who should, on receipt, write the Notication Number on the Bench-

mark Checklist.

This product should be serviced regularly to optimise its safety, efciency and performance.

The service engineer should complete the relevant Service Record on the Benchmark

Checklist after each service.

The Benchmark Checklist will be required in the event of any warranty

Using the boiler...

Before lighting the boiler you are advised to have a Registered Gas Safe Registered

Engineer check that the installation of the gas supply is

• gas-tight;

• of the correct gauge for the ow to the boiler;

• tted with all the safety and control devices required by the current Regulations.

Ensure that

• the Installer has connected and terminated the pressure relief valve in a manner which

allows safe discharge. The manufacturers are not responsible for damage caused by

opening of the pressure relief valve and consequent escape of water, if this is not con-

nected and terminated.

• the installer has connected the condensate outlet to a suitable drain pipe.

- 4 -

WARNING

On detecting the smell of gas:

• do not operate any electrical switches, the telephone or any device that may produce

sparks;

• open the windows and doors at once to create a draught of air which will purge the area;

• shut off the gas cocks;

• get the assistance of a qualied person. Emergency telephone number

Tel 0800 111999.

Do not touch the appliance with parts of the body that are wet or damp and/or bare feet.

Do not block or modify the condensate outlet and pipework.

In case of structural work or maintenance near the ue and ue terminal turn off the

appliance. On completion of the work, have a professionally qualied person check there

efciency.

Repairs (under guarantee) must be carried out only by an approved engineer, using

genuine spare parts. Thus do no more than switching off the boiler yourself (see the in-

structions).

Your boiler allows heating up of water to a temperature less than boiling point therefore it

• must be connected to a central heating system and/or a hot water supply system, com-

patible with its performance and output;

• can be used only for those purposes for which it has been specially designed;

• must not be touched by children or by those unfamiliar with its operation;

• must not be exposed to weather conditions.

During the operation it is quite normal that the boiler produces a white plume of conden-

sation vapour from the ue terminal. This is due to the high efciency of the appliance and

may be particularly evident with low outdoor temperatures.

Safe handling of substances

Biasi products are manufactured in accordance with ISO 9001 and do not, and will not,

contain any hazardous materials or substances such as asbestos, mercury or C.F.C.’s. The

appliance packaging does not contain any substances, which may be considered a hazard

to health.

When handling or lifting always use safe techniques

• Keep your back straight, bend your knees, don't twist.

• Move your feet, avoid bending forwards and side ways and keep the load as close to your

body as possible.

Where possible transport the boiler using a sack truck or other suitable trolly.

Always grip the boiler rmly, and before lifting feel where the weight is concentrated to estab-

lish the centre of gravity, repositioning yourself as necessary.

- 5 -

WARNING

Combustion chamber panels

Material: mineral bres

Known hazards - Some people can suffer reddening and itching of the skin. Fibre entry into

the eye will cause foreign body irritation, which can cause severe irritation to people wearing

contact lenses. Irritation to respiratory tract.

Precautions - Dust goggles will protect eyes. People with a history of skin complaints may

be particularly susceptible to irritation. High dust levels are only likely to arise following harsh

abrasion. In general, normal handling and use will not present high risk. Follow good hygiene

practices; wash hands before, touching eyes, consuming food, drinking or using the toilet.

First aid - Medical attention must be sought following eye contact or prolonged reddening of

the skin.

Sharp Edges

Caution should be taken when handling the boiler to avoid sharp edges on the boiler.

Boiler installation and commissioning tips

The installation must be carried out by a qualied Gas Safe Registered Engineer who will

be responsible for observing the current Regulations and the completion of the Bench-

mark Gas Boiler System Commissioning Checklist, located at the back of this User man-

ual.

- 6 -

WARNING

Abbreviations used in the manual:

C.H. = Central heating

D.H.W. = Domestic hot water

D.C.W. = Domestic cold water

Installing the boiler...

You must ensure that you remove the transit caps and plugs from the boiler connections

which are tted to every boiler.

Keep the boiler clear of dust during installation and in particular do not allow any dust or

debris to enter the top of the boiler where the ue connection is made. It is recommended

that you put a dust sheet over the top of the boiler until you are ready to make the ue

connection.

Remember to release the auto air purge valve on the pump assembly before lling the

boiler. See the instructions to identify the location of this device.

This boiler allows you to control the ow temperature of the central heating system at

very low levels. In case of underoor heating system a temperature limiting device (e.g. a

safety thermostat) is recommended to stop the boiler in case that the water temperature

exceeds the design temperature.

You are strongly to ush out the system both hot and cold in order to remove any system

and installation debris to the British Standard BS 7593 code of practice.

It is also sensible to initially re and commission the boiler before connecting any external

controls such as a room thermostat. By following this procedure, if you have a subse-

quent problem this method can eliminate the external controls from your fault analysis.

Some products incorporate an anti cycling time delay. It is normal when rst switching the

boiler on for the boiler to operate on heating for a few seconds then switch off. After 3 - 4

minutes has elapsed the boiler will then re ignite and operate perfectly normally. The igni-

tion delay cycle does not prevent normal operation of the boiler to provide D.H.W.

If you are in any doubts as to the installation or operation of the boiler please read the

instruction manual thoroughly and then if necessary contact Biasi UK for advice and as-

sistance.

Guarantee conditions. The guarantee registration form must be returned within 30 days

of purchase, failure to comply will invalidate the guarantee.

Please remember that if you are in any doubt about the installation of this product you can

contact our Technical Help line on tel. 01922 714 600.

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TABLE OF CONTENTS

1 APPLIANCE DESCRIPTION ............ 8

1.1 Overview............................... 8

1.2 Control panel ........................... 8

1.3 Isolation valves .......................... 8

1.4 Technical data........................... 8

1.5 Operation lights ......................... 9

2 INSTRUCTIONS FOR USE . . . . . . . . . . . . 10

2.1 Warnings.............................. 10

2.2 Relling procedure ...................... 10

2.3 Ignition ................................11

2.4 C.H. circuit temperature ...................11

2.5 Switching off ........................... 12

3 USEFUL ADVICE.................... 13

3.1 Central Heating......................... 13

3.2 Frost protection......................... 13

3.3 Condensate drain ....................... 13

3.4 Periodic maintenance .................... 13

3.5 External cleaning ....................... 13

3.6 Operational faults ....................... 14

4 TECHNICAL INFORMATION........... 15

4.1 Overview.............................. 15

4.2 Main diagram .......................... 16

4.3 Technical data mod. Riva Plus HE 24S ERP .. 18

4.4 Technical data mod. Riva Plus HE 28S ERP .. 21

4.5 Hydraulic specications .................. 24

4.6 Expansion vessel ....................... 24

5 GENERAL REQUIREMENTS .......... 25

5.1 Related documents...................... 25

5.2 Location of appliance .................... 25

5.3 Flue system ........................... 26

5.4 Gas supply ............................ 27

5.5 Air supply ............................. 28

5.6 Ventilation ............................. 28

5.7 Condensate drain ....................... 28

5.8 Water circulation (C.H.) .................. 29

5.9 Water treatment ........................ 30

5.10 Electrical supply ........................ 30

6 INSTALLATION ..................... 31

6.1 Warnings.............................. 31

6.2 Precautions for installation ................ 31

6.3 Installing the bracket..................... 32

6.4 Overall dimensions ...................... 32

6.5 Joints ................................ 32

6.6 Mounting the boiler ...................... 32

6.7 Fitting the ue system.................... 33

6.8 Choice of ue .......................... 33

6.9 Electrical connections.................... 36

6.10 External frost protection .................. 38

6.11 Connecting a system boiler to a cylinder ..... 39

7 COMMISSIONING . . . . . . . . . . . . . . . . . . . 42

7.1 Warnings.............................. 42

7.2 Electrical installation ..................... 42

7.3 Gas supply installation ................... 42

7.4 Initial lling of the system ................. 42

7.5 Condensate pipe and traps ............... 44

7.6 Lighting the boiler ....................... 44

7.7 Checking the gas pressure at the burner ..... 45

7.8 Checking the burner ignition............... 46

7.9 Checking the ignition device............... 46

7.10 Checking the ue system ................. 46

7.11 Check pump operation/pump release........ 46

7.12 Checking the condensate drain pipe ........ 47

7.13 Instructing the user ...................... 47

8 GAS CONVERSION ................. 48

8.1 Warnings.............................. 48

8.2 Procedures ............................ 48

9 MAINTENANCE..................... 50

9.1 Warnings.............................. 50

9.2 Dismantling the external panels ............ 50

9.3 Emptying the C.H. system ................ 50

9.4 Combustion analysis check ............... 51

9.5 Cleaning the primary heat exchanger........ 51

9.6 Checking the pressurisation in the expansion

vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

9.7 Cleaning the burner ..................... 51

9.8 Checking the ue system ................. 51

9.9 Drain pipe inspection .................... 51

9.10 Visual inspection of appliance ............. 51

9.11 Gas pressures and tightness .............. 51

10 BENCHMARK COMMISSIONING AND

SERVICING SECTION................ 53

Gas boiler system commissioning checklist ... 54

Service record.......................... 55

Appliance category: II2H3+ (Gas G20 20 mbar, G30 29 mbar, G31 37 mbar)

Country of destination: United Kingdom (GB) Ireland (IE)

This appliance conforms with the following EEC directive:

Gas Directive Gas 2009/142/EC

Efciency Directive 92/42/EEC

Electromagnetic Compatibility Directive 2014/30/EU

Low Voltage Directive 2014/35/EU

Ecodesign Requirements Directive 2009/125/EC

The manufacturer, in the continuous process to improve his products, reserves the right to modify the data expressed

in the present documentation at any time and without prior notice.

The present documentation is an informative support and it can not be considered as a contract to-wards third parties.

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USE

APPLIANCE DESCRIPTION

1 APPLIANCE DESCRIPTION

1.1 Overview

Fig. 1.1

1 Case front panel

2 Control panel

3 Control panel cover

1.2 Control panel

4 C.H. circuit temperature and pressure

gauge

5 Lock-out signal lamp

6 Lockout reset button

7 Function selector and C.H. temp. con-

trol knob

8 Service knob

9 Appliance operation lights

The service knob 8 is useless for the normal

operation of the boiler.

1.3 Isolation valves

Fig. 1.2

10 Condensate drain pipe

11 C.H. return valve

12 Gas inlet valve

13 C.H. ow valve

1.4 Technical data

For detailed technical data see sections

"Technical Data" on pag. 18 or pag. 21.

9 8 7 6 5 4

Fig. 1.3

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USE

APPLIANCE DESCRIPTION

1.5 Operation lights

Three lights (9 in Fig. 1.3) give detailed indi-

cation regarding the operation of the boiler.

The following table gives the relationship

between each of the possible light combina-

tions and their meaning.

A short pulse every 4

seconds: stand-by con-

dition

Function selector in

position.

Anti-freeze system ac-

tive

1 second pulse every 2

seconds: normally op-

erating boiler. Function

selector in

position

C.H. operation

Frost protect operation

Faulty C.H. tempera-

ture

probe NTC

Faulty ue temperature

probe NTC

Faulty primary circuit

(no water or low C.H.

pressure)

Faulty primary circuit

(absence of ow)

Faulty air pressure

sensor

Lack of burner ignition

(no ignition signal from

the full sequence igni-

tion device)

Safety thermostat lock

out

Flue temperature probe

NTC lock out

Flame detection error

Other faults

Lack of power supply

or faulty electr. control

p.c.b.

Meaning of symbols:

Lamp OFF

Lamp ON

Flashing lamp, alone or simulta-

neously with an other lamp

Flashing lamp, alternate with an-

other lamp

If the lights combination observed is not

included in the above table a fault may be

indicated.

Reference should be made to the following

table.

In this case switch off the boiler, as de-

scribed in section "Switching off" to page 12

and call a competent and responsible Ser-

vice Engineer.

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USE

INSTRUCTIONS FOR USE

2 INSTRUCTIONS FOR USE

2.1 Warnings

Biasi UK Ltd support the Benchmark

initiative. The Benchmark Checklist is

located at the back of this manual and

should be completed by the Installing/

Commissioning Engineer and handed

over to the User for future reference by

other visiting Engineers. Also included

is the Service Interval Record card that

should be completed by the Service

Engineer following the annual service

maintenance of the boiler and system.

All Gas Safe Registered Installers carry

a Gas Safe ID card, and have a registra-

tion number. Both should be recorded

in your Benchmark Checklist. You can

check your Installer is registered by call-

ing Gas Safe direct on 0800 408 5500,

or go on line at www.GasSafeRegister.

co.uk.

In order to guarantee safety and correct op-

eration, it is essential that all the tests are

carried out by a competent and responsi-

ble service engineer before lighting up the

boiler.

The tests are described in the installation

instructions in section 7 commissioning.

Ensure that the C.H. circuit is regularly lled

with water (even if the boiler is only used for

D.H.W. supply) checking that the pressure

indicated on pressure gauge 4 is not lower

than that shown in Fig. 2.2.

If the pressure reading on the pressure

gauge is below that shown in Fig. 2.2, then

the system will require topping up.A lling

loop is normally provided by the Installer for

this purpose.

If you are in any doubt regarding this

procedure you are advised to contact

your Installer or an Approved Engineer.

This appliance is provided with a built in

anti-freeze system that operates the boiler

when the temperature is below 5 °C.

Therefore, when the boiler is not lit or used

in cold weather, with consequent risk of

freezing do not switch off the boiler at the

fused spur isolation switch or close the

gas inlet cock.

When you do not expect to use the boiler

for a long period and the boiler is not to be

used for frost protection then follow the in-

structions given in section "Switching off" to

page 12.

2.2 Relling procedure

• Isolate the boiler from the electrical sup-

ply at the fused spur. Reconnect the lling

loop as demonstrated in Fig. 2.1.

Fig. 2.1

Control valve

Double

check valve

Temporary

connection

Supply pipe

(cold water inlet)

Control valve

C.H. return pipe

• Open the valves of the lling loop and

watch the gauge until it reaches normal

lling pressure as shown in Fig. 2.2.

Fig. 2.2

Normal

lling

pressure

• Close the valves and remove the lling

loop.

If you experience any difculty with the

operation of the boiler, switch off the

boiler immediately at the fused spur iso-

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USE

INSTRUCTIONS FOR USE

lation switch and contact your Installer

or an approved Service Engineer.

Air introduced into the boiler during this ll-

ing process will vent through the automatic

air purger tted to the boiler. You may also

nd it necessary to vent air from your radia-

tor circuit using your radiator key, however

be aware that excessive venting will cause

the pressure in the system to drop.

Always ensure that the pressure gauge is

set at the required pressure.

2.3 Ignition

• Check that the valves located in the lower

part of the boiler are open Fig. 2.3.

Fig. 2.3

Open position

• Turn on the electricity supply to the boil-

er switching on the fused spur isolation

switch. The appliance operation light

9 (Fig. 2.4) will ash every 4 seconds

(stand-by condition).

• To operate the boiler, position the function

selector 7 as in Fig. 2.4. The appliance

operation light 9 will ash every 2 seconds

(operating boiler).

Fig. 2.4

2.4 C.H. circuit temperature

The output temperature of C.H. water is ad-

justable from a minimum of about 40°C to a

maximum of about 85°C (Fig. 2.5), by turn-

ing the function selector (7).

Adjustment of C.H. output on the boiler is

automatic.

Fig. 2.5

Minimum

Maximum

The greatest output pre-set in the factory

can, however, be reduced in level accord-

ing to actual system requirements; this does

not affect the maximum output in D.H.W.

operation.

Such adjustments must be carried out by a

qualied person; therefore we advise you to

contact your installer or Service Agent.

Adjustment of the boiler temperature alters

the gas ow at the burner according to the

- 12 -

USE

INSTRUCTIONS FOR USE

thermal demand in the system. So it is usual

to see the burner lit at the minimum level for

more or less long periods.

Adjustment

In order to achieve optimal settings for econ-

omy and comfort, we recommend adjusting

the operating temperature of the C.H. water

according to the outside temperature, posi-

tioning the knob as follows:

Fig. 2.6

From 5 to 15 °C

Between

- 5 and +5 °C

Lower

than - 5 °C

Your qualied installer will be able to rec-

ommend the most suitable adjustment for

your system. The temperature and pres-

sure gauge (4, Fig. 1.3 on page 8) will al-

low you to check that the set temperature

is obtained.

2.5 Switching off

To turn the boiler off set the function selec-

tor 7 to the position shown in Fig. 2.7.

Fig. 2.7

The appliance operation light 9 will ash

every 4 seconds.

When you do not expect to use the boiler for

a long period:

• Switch off the electricity supply to the boil-

er, by means of the fused spur isolation

switch;

• Shut off the gas supply cock 12 and the

valves for the water circuits tted under

the boiler (Fig. 2.8).

• Empty the water circuits, if necessary,

as shown in section General access and

emptying hydraulic circuits in the service

manual.

Fig. 2.8

Closed position

- 13 -

USE

USEFUL ADVICE

3 USEFUL ADVICE

3.1 Central Heating

For reasonably economical service install a

room thermostat. Never shut off the radiator

in the area where the room thermostat is in-

stalled.

radiator (or a convector) does not heat up,

check that no air is present in it and that its

valve is open. If the ambient temperature is

too high, do not alter the radiator valves. Re

duce the central heating temperature instead

by means

of the room thermostat and the

function selector (7 in Fig. 3.1).

Fig. 3.1

3.2 Frost protection

This appliance is provided with a built in anti-

freeze system that operates the boiler when

the temperature is below 5 °C

Therefore, when the boiler is not lit and used

in cold weather, with consequent risk of freez

ing do not switch off the boiler at the fused

spur isolation

switch or close the gas inlet

cock.

3.3 Condensate drain

The condensate drain must not be modied

or blocked. Blockage of the condensate drain,

caused by debris or freezing, can cause auto-

matic shutdown of the boiler.

freezing

is suspected and the pipe run is ac-

cessible an attempt may be made to free the

obstruction by

pouring hot water over the ex-

posed pipe an cleaning any blockage from the

end of the pipe.

If this

fails to remedy the problem the assis-

tance of a Gas Safe Registered Installer or in

IE a competent person should be sought.

3.4 Periodic maintenance

For efcient and continuous operation of the

boiler, it is advisable to arrange maintenance

and cleaning by an Authorised Service Centre

Engineer, at least once a year.

During the service, the most important com

ponents of the boiler will be inspected and

cleaned. This

service can be part of a main-

tenance contract.

In particular

, you are advised to have the fol-

lowing checks carried out:

•

primary heat exchanger;

• burner;

• exhaust fume duct and ue;

• pressurisation of the expansion tank;

• lling up of the central heating circuit;

• bleeding of air from the central heating sys

tem;

•

general check of the appliance’s operation.

Please refer to the servicing information on

section "MAINTENANCE" on page 50.

3.5 External cleaning

Before carrying out any cleaning,

disconnect the appliance from the

electrical mains, using the fused

spur isolation switch tted adja-

cent to the appliance.

clean the external panels, use a cloth

soaked in soapy water. Do not use solvents,

abrasive powders or sponges.

Do not carry out cleaning of the appliance

and/or its parts with readily ammable sub

stances (for example petrol, alcohols, naph-

tha, etc.).

- 14 -

USE

USEFUL ADVICE

3.6 Operational faults

If the lock-out signal lamp comes on

This indicates that the safety lock-out 5 (Fig.

3.2) has stopped the boiler.

To re-start the boiler, it is necessary to press

the boiler reset button 6 (Fig. 3.2).

Fig. 3.2

For the rst lighting up and following mainte-

nance procedures for the gas supply, it may

be necessary

to repeat the resetting operation

several times so as to remove the air present

in the pipe work.

After ve consecutive resetting attempts the

reset button is inhibited. To restore its func

tion it is necessary to switch the boiler off and

on from

the electrical mains, using the fused

spur isolation switch tted adjacent to the ap-

pliance.

Safety

lock-out

may occur even in case of a

blockage of the condensate drainage (e.g.

plugged drain pipe).

It is advisable to check the condensate drain

age pipe and traps for cleanness.

In this case and in case of persis-

tent lock-out call a competent and

responsible Service Engineer.

If noises due to air bubbles are heard dur-

ing operation...

should check that the pressure on the

temperature and pressure gauge (Fig. 2.2 on

page 10) is not below the correct setting.

If required, top up the system correctly, as de

scribed in the section "Rellin

g procedure" to

page 10.

Bleed any air present in the radiators, if nec-

essary.

If the pressure on the temperature and

pressure gauge has gone down...

It is necessary to top up the appliance with

water again, so as to raise the pressure to

an adequate level as described in the section

"Relling procedure" to page 10. If topping

up with water has to be done very frequently,

have the system checked for leaks.

If water comes out of the pressure relief

valve

Check on the temperature and pressure

gauge that the pressure in the central heat

ing circuit is not close to 3 bars. In this case,

temperature rise

in the circuit can cause the

pressure relief valve to open.

So that this does not happen and to decrease

the pressure to a normal value, it is advisable

to vent some of the water in the appliance

through the bleed valves present in the radia

tors.

If water should occasionally leak from the

boiler

...

Shut

off the valves positioned under the boiler

(Fig. 2.8 on page 12) and call an Authorised

Service Centre Engineer.

If the left appliance operation light 9 (Fig.

3.3) ashes very quickly the boiler is de

tecting a fault.

Fig. 3.3

In this case or in case of problems

other than those mentioned here,

switch off the boiler, as described

in section "Switching off" to page

12 and call a competent and re-

sponsible Service Engineer.

- 15 -

INSTALLATION

TECHNICAL INFORMATION

4 TECHNICAL INFORMATION

4.1 Overview

Fig. 4.1

17 19

27 26 23

25 21

18 14 15

- 16 -

INSTALLATION

TECHNICAL INFORMATION

4.2 Main diagram

Fig. 4.2

10 Condensate drain pipe

11 C.H. return valve

12 Gas inlet valve

13 C.H. ow valve

14 Fan

15 Air pressure sensor test points

16 Air pressure sensor

17 Flue temperature probe NTC

18 Condensing heat exchanger

19 Safety thermostat

20 C.H. temperature probe NTC

21 Condensate trap

22 Main circuit drain valve

23 Automatic air purger valve

12 11

- 17 -

INSTALLATION

TECHNICAL INFORMATION

24 Pump

25 C.H. pressure relief valve

26 Modulation gas valve

27 Primary circuit pressure switch

28 Combustion chamber over heat

29 Flame-detecting electrode

30 Burner

31 Ignition electrodes

32 Combustion chamber

33 Primary heat exchanger

34 Modulation operator

35 Gas valve outlet pressure test point

36 Gas valve inlet pressure test point

37 C.H. expansion tank

38 By-pass valve

39 Fan pressure connection

40 Flue outlet pipe

41 Air intake pipe

- 18 -

INSTALLATION

TECHNICAL INFORMATION

4.3 Technical data mod. Riva Plus

HE 24S ERP

Heat input

Nominal net

(A)

(C.H.)

kW 25,0

BTU/h 85304

Nominal gross

(B)

(C.H.)

kW 27,8

BTU/h 94687

Minimum net

(A)

C.H.

kW 7,5

BTU/h 25591

Minimum gross

(B)

C.H.

kW 8,3

BTU/h 28406

Useful output

Maximum (C.H.)

kW 24,4

BTU/h 83256

Minimum (C.H.)

kW 7,3

BTU/h 24909

Maximum condensing (C.H.)

kW 26,3

BTU/h 89739

Minimum condensing (C.H.)

kW 7,8

BTU/h 26615

Central heating

Min/Max ow temperature settings* °C 50-85

Minimum return temperature °C 40

Maximum pressure

kPa 250

bar 2,5

Minimum pressure

kPa 30

bar 0,3

Available head (in 1000 l/h)

kPa 25

bar 0,25

Seasonal efciency G20 % 88,1

Seasonal effciency G30 G31

(C)

% 89,1

* to the minimum useful output

Gas supply pressures

Gas Pa mbar

Natural G20

Nom 2000 20

Min 1700 17

Max 2500 25

Butane G30

Nom 2900 29

Min 2000 20

Max 3500 35

Propane G31

Nom 3700 37

Min 2500 25

Max 4500 45

1 mbar approximately equals 10 mm H

Max. gas pressures at the burner

Natural G20

Pa 1340

mbar 13,4

Butane G30

Pa 2760

mbar 27,6

Propane G31

Pa 3550

mbar 35,5

Min. gas pressures at the burner

Natural G20

Pa 140

mbar 1,4

Butane G30

Pa 280

mbar 2,8

Propane G31

Pa 350

mbar 3,5

Ignition gas pressures at the burner

Natural G20

Pa 850

mbar 8,5

Butane G30

Pa 2110

mbar 21,1

Propane G31

Pa 2700

mbar 27,0

1 mbar approximately equals 10 mm H

- 19 -

INSTALLATION

TECHNICAL INFORMATION

Gas rate maximum – C.H.

Natural G20 m

/h 2,65

Butane G30 kg/h 1,97

Propane G31 kg/h 1,94

Gas rate minimum – C.H.

Natural G20 m

/h 0,79

Butane G30 kg/h 0,59

Propane G31 kg/h 0,58

Gas restrictors references N°

Ø mm

/100

Natural G20 12 120

Butane G30 12 77

Propane G31 12 77

Electrical data

Voltage V~ 230

Frequency Hz 50

Nominal Power consumption W 79

Minimum Power consumption W 65

Stand-by Power consumption W 3

Protection degree IPX4D

External fuse rating A 3

Internal fuse rating A

N° 2 - 2

Flue design

Boiler type

C12 C32 C42 C52 C82

ø Coaxial mm 60/100

ø Twin split pipes mm 80/80

ø Roof mm 60/100

ø Roof mm 80/125

Nominal heat ow rate

(A) (E)

kW 25,0

Exhaust temperature

(E)

°C 60,0

Mass ow rate

(E)

kg/s 0,0128

Flue gas gures

Nominal heat input

(A) (E)

kW 25,0

2 content with gas G20 % 7,9

2 content with gas G20 % 6,8

CO content with gas G20 ppm 52,0

Exhaust temperature

(E)

°C 60,0

NOx class 2,0

Weighted NOx ppm 94

2 contents

Nominal heat input

(A) (E)

kW 25,0

2 content with gas G20 % 7,9

2 content with gas G30 G31 % 9,1

Minimum heat input

(A) (E)

kW 7,5

2 content with gas G20 % 3,9

2 content with gas G30 G31 % 4,5

Other specications

Height mm 803

Width mm 400

Depth mm 350

Weight (dry) kg 35,5

Water volume in the boiler (up to 1

bar)

l (kg) 1,4

(A)

referred to the net caloric value at 15°C and

1013,25 mbar: G20 = 34,02 MJ/m

- G31 = 46,34 MJ/

(B)

referred to the gross caloric value at 15°C and

1013,25 mbar: G20 = 37,78 MJ/m

- G31 = 50,37 MJ/

(C)

The value is used in the UK Government’s Standard

Assessment Procedure (SAP) for energy rating of

dwellings. The test data from which it has been calcu-

lated have been certied by a notied body.

(D)

Values subject to tolerance

(E)

Values refer tests with a 1 m ue working at the

nominal heat input

(1208)

- 20 -

INSTALLATION

TECHNICAL INFORMATION

Model(s): Riva Plus HE 24S ERP

Condensing boiler: Yes

Low-temperature boiler (**): No

B1 boiler: No

Cogeneration space heater: No If yes, equipped with a supplementary heater: -

Combination heater: No

Item Symbol Value Unit Item Symbol Value Unit

Rated heat output P

rated

24 kW

Seasonal space heating

energy efciency

89 %

For boiler space heaters and boiler combination heat-

ers: Useful heat output

For boiler space heaters and boiler combination heaters:

Useful efciency

At rated heat output and

high-temperature regime (*)

24,4 kW

At rated heat output and

high-temperature regime (*)

87,7 %

At 30% of rated heat output

and low-temperature regime

(**)

7,9 kW

At 30% of rated heat output

and low-temperature regime

(**)

95,4 %

Auxiliary electricity consumption Other items

At full load elmax 0,079 kW Standby heat loss P

stby

0,098 kW

At part load elmin 0,065 kW

Ignition burner power con-

sumption

ign

- kW

In standby mode P

0,003 kW Annual energy consumption Q

79 GJ

Sound power level, indoors L

48 dB

Emission of nitrogen oxides NO

166

mg/

kWh

For combination heaters:

Declared load prole

Water heating energy ef-

ciency

Daily electricity consumption Q

elec

kWh Daily fuel consumption Q

fuel

kWh

Annual electricity consump-

tion

AEC kWh Annual fuel consumption AFC GJ

Contact details See manual cover

(*) High-temperature regime means 60°C return temperature at heater inlet and 80°C feed temperature at heater

outlet.

(**) Low temperature means for condensing boilers 30°C, for low-temperature boilers 37°C and for other heaters

50°C return temperature (at heater inlet).

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Biasi Riva Plus HE System ERP 24kw and 28kw User manual

Brand: Biasi

Model: Riva Plus HE System ERP 24kw and 28kw

Category: Water heaters & boilers

Type: User manual

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Biasi Riva Plus HE System ERP 24kw and 28kw User manual

Biasi Riva Plus HE System ERP 24kw and 28kw User manual

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