remeha Avanta Plus Combi 24C, Avanta Plus Combi 28C, Avanta Plus Combi 35C, Avanta Plus Combi 39C, Avanta Plus System 18S User guide

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Installation & Service Manual

Remeha Avanta Range

24c | 28c | 35c | 39c | 18s | 24s | 30s

Remeha Avanta Plus

Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer’s instructions by competent persons and that it meets the requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the customer for future reference. Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme.

Visit www.centralheating.co.uk for more information.

CONTENTS

INTRODUCTION 4

1 SAFETY 5

1.1 General safety 5

1.2 Safety during assembly and installation 5

1.3 Safety during installation, inspection and maintenance 5

2 INSTALLATION 7

2.1 Scope of delivery 7

2.2 Mounting the boiler 7

2.2.1 Clearance requirements 7

2.2.2 Dimensions and connection points. 8

2.2.3 Mounting the Remeha Avanta Plus 10

2.3 Water-side connections 10

2.3.1 Water ﬂ ow 10

2.3.2 Circulation pumps 11

2.3.3 Additional guidelines for the domestic and CH water 11

2.3.4 Water treatment 11

2.3.5 Safety valve discharge 12

2.3.6 Expansion vessel 13

2.3.7 Connecting DHW pipes 13

2.3.8 Connecting the ‘CH return’ 14

2.3.9 Connecting ‘CH ﬂ ow’ 14

2.3.10 Connecting condensate drain 15

2.3.11 Connecting under ﬂ oor heating 15

2.4 Gas-side connections 15

2.4.1 Additional guidelines for gas connections 15

2.4.2 Adjusting boiler to other gas-type 16

2.4.3 Connecting the gas supply 16

2.5 Flue terminal and air supply connections 16

2.5.1 Flue terminal positions 16

2.5.2 Room sealed ﬂ ue 17

2.5.3 Connecting the ﬂ ue terminal and air supply 18

2.6 Electrical connection 19

2.6.1 The control unit 19

2.7 Connecting external controls 20

2.7.1 On/off control – room temperature (volt free switching) 22

2.7.2 Time control using an internal or external 230 V clock 22

2.7.3 Connecting a 230 V time clock in combination with a modulating room control 23

2.7.4 Modulating control – room or outside compensation 23

2.7.5 Connecting an outside temperature sensor 24

2.7.6 Connecting the DHW sensor/thermostat 25

2.7.7 Connecting a frost thermostat 25

2.7.8 Connecting an external interlock 26

2.7.9 Connecting remote alarm, boiler run indication and external pump relay 26

2.7.10 Connecting a PC/PDA 26

2.9 Commissioning 28

2.9.1 Control Panel 28

2.9.2 Additional guidelines for commissioning 28

2.9.3 Putting the boiler into operation 28

2.9.4 Normal start-up procedure 34

2.9.5 Error during the start-up procedure 35

2.9.6 Read out settings 36

2.9.7 Adjust the boiler according to the system 36

2.9.8 Changing the parameters at service level (with access code) 37

2.9.9 Changing the maximum output (Hi) for CH operation 40

2.9.10 Restore factory settings 42

2.10 Putting the boiler out of operation 42

2.10.1 Boiler with frost protection, during longer periods of non-use 42

2.10.2 Boiler without frost protection, during longer periods of non-use 42

3 INSPECTION AND MAINTENANCE 43

3.1 Inspection 43

3.1.1 Checking the water pressure 44

3.1.2 Checking the ﬂ ue pipes and air supply pipes for leaks 44

3.1.3 Checking the condensate siphon 45

3.1.4 Checking the ignition electrode 45

3.2 Maintenance 47

4 ERRORS 52

4.1 General 52

4.2 Error codes 52

4.3 Control stop or lock-out 54

4.4 Error memory 55

4.4.1 Error read outs 55

4.4.2 Deleting errors 55

5 SERVICE PARTS 56

5.1 General 56

6 EC declaration 59

7 REGULATIONS 60

7.1 EC regulations 60

7.2 Remeha factory test 60

7.3 Additional guidelines 60

8 TECHNICAL SPECIFICATIONS and working principle 61

8.1 Technical data 61

8.2 The boiler components 63

8.3 Working principle 63

8.3.1 Regulating 64

8.3.2 Advanced boiler control (‘abc®’-control) 64

8.3.3 Regulating the water temperature 64

8.3.4 Low ﬂ ow / water protection 65

8.3.5 High Limit temperature protection 65

9 efficiency data and gas efficiency labels 66

9.1 Annual efficiency 66

9.2 Water-side efficiency 66

INTRODUCTION

Remeha Avanta Plus

The Remeha Avanta Plus is a series of high-efficiency fully condensing central heating boilers, for wall mounting, available in the following types:

• Remeha Avanta Plus 24c, 28c, 35c and 39c - with inte-

grated domestic hot water system (Combi-type)

• Remeha Avanta Plus 18s, 24s, 30s

- without integrated domestic hot water system

(System-type)

These technical instructions contain useful and important information for the correct installation, operation and maintenance of the Remeha Avanta Plus combi and system boilers.



Read these instructions carefully before putting the boiler into operation, familiarise yourself with their control functions and operation, strictly observing the instructions given. Failure to do so may invalidate warranty or prevent the boiler from operating correctly.

ﬁ g. 01 Remeha Avanta Plus

112952.LT.GB.W7H.001

The installation, commissioning, inspection and servicing of the boiler must be carried out by a competent registered engineer who holds valid ACS certification and in accordance with current gas safety (installation and use) regulations, the building regulations and all other relevant codes of practice. All electrical work must be carried out by a competent engineer and to be installed in accordance with the current IEE regulations.



On commissioning the certificate in the Benchmark Checklist within the Installation + Service manual must be completed and left on site with a copy send on to Broag Ltd for registration purposes.

If you have any questions, require an engineer to call on site, or if you need more information about specific subjects relating to this boiler, or it's installation please do not hesitate to contact our technical help line 0118 978 3434.



When contacting Broag with a problem on the boiler, please have available the boiler type, Serial No (located on the bottom of the casing), and the symptoms or fault code (the fault code is a series of flashing red digits in the display panel).

The data published in these technical instructions is based on the latest information (at date of publication) and may be subject to revisions. We reserve the right to continuous development in both design and manufacture, therefore any changes to the materials or technology employed may not be retrospective nor may we be obliged to adjust earlier supplies accordingly.

1 SAFETY

1.1 General safety

The following pictograms are used in this Installation and Service manual to specifically draw certain points to your attention:

Tip  Useful tip or practical advice. Indication  Important instruction in carrying out a

particular operation.

Warning  Possible danger of personal injury

or material damage to the regulator, building or environment.

Danger  Serious personal injury can occur

because of risk of electric shocks.

1.2 Safety during assembly and installation

Observe the appropriate safety measures, as given in these instructions.



Can you smell gas? What to do:

• do not smoke and do not create any flame or sparks;

• do not use any electric switches;

• turn off the gas tap;

• open windows and doors;

• trace possible leaks and seal them. Warning! If the leak is before the gas meter, alert your gas supplier, TRANSCO, tel. 0800 111 999



Can you smell smoke or flue gasses? What to do:

• isolate power supply.

• open windows and doors;

• trace possible leaks and seal them.

1.3 Safety during installation, inspection and maintenance

Under the current Gas Safety (Installation & Use) Regulations, the Remeha Avanta Plus, in common with all gas appliances, must be installed by a competent person in accordance with that regulation. Statutory regulations in any country, cannot be overridden by any of the notes or instructions from the manufacturer. Compliance with National Standards does not provide any degree of immunity from legal obligations. In the UK, the installation must be in accordance with the national and local norms and requirements.

For any issues or circumstances not addressed within these instructions, please call our After Sales Department 0118 9743070

ﬁ g. 02 WRAS logo

LT.AL.W7H.000.074

Remeha Avanta Plus

The Remeha Avanta Plus (combi and system) is a WRAS (Water regulations) approved product.

Remeha Avanta Plus (combi and system) - PIN: 0063BQ3009 Gas Council numbers: Remeha Avanta Plus 28c: 47-673-02 Remeha Avanta Plus 35c: 47-673-03 Remeha Avanta Plus 39c: 47-673-04 Remeha Avanta Plus 18s: 41-288-11 Remeha Avanta Plus 24s: 41-288-05 Remeha Avanta Plus 30s: 41-288-12

Classification type for evacuation of the combustion products; according EN 483: see Par. 8.1.

Health and safety information

• The weight of the Avanta Plus system and combi boilers exceed the maximum lift weight for one person. Please ensure all necessary care is taken when lifting the boiler on to the wall mounting plate.

• All sealants and gaskets are free from harmful products. On first firing the boiler, a smell from the sealants and gaskets may be present and should cease after a short period.

Remeha Avanta Plus 24c: 41-288-01

2 INSTALLATION

2.1 Scope of delivery

The standard delivery of the Remeha Avanta Plus boiler includes:

- the boiler (including pressure gauge and safety valve);

- mounting plate (including isolation valve set and washers);

- nylon plugs and screws for fixing mounting plate;

- copper tails 15/22 mm;

- mounting template;

- filling loop;

- Warranty Leaflet (The terms and conditions of the warranty are included in the warranty leaflet, on installation of the boiler please fill in the registration card and return to BroagRemeha);

- Installation and Service manual and Users guide.

This Installation and Service manual deals with the standard supplied boiler only. For the installation or assembly of any

optional accessories supplied with the boiler, such as stand off frame, pipework kits, cover plate, control kits, etc, please refer

to the Assembly Instructions supplied with these accessories.

Instructieservice

AvantaPlus

ﬁ g. 03 Scope of delivery

112952.LT.GB.W7H.011

400

2.2 Mounting the boiler

Packed in the box with the Remeha Avanta Plus box is this Installation and Service manual. Read instructions and remarks carefully. This section includes the guidelines and instructions for the connection of gas, water, electricity, safety devices, the regulator, control unit, flue discharge and air supply.

2.2.1 Clearance requirements

The gas and water connections are located on the bottom of the boiler whilst the air in and flue gas outlet is located on the top of the boiler. The boiler is supplied as standard with pipework tails to allow connections facing downwards.

min

Optional stand off frame and pipework kits are available to enable the pipework to run upwards behind the boiler if

250

required. For installation, servicing and inspection min. 600 mm in front of the boiler is required. If this free space is obtained by opening a door or removing a panel, the boiler

may be installed for instance in a closed cupboard. For ease of installation we recommend clearances of 0.5 cm at the side so that the unit is easy to open, with a free space of 25 cm under the appliance and 25 cm above the appliance, as the minimum requirement.

min

However once installed, it is possible to reduce these clear-

.25

ances to 22 cm at the top, and 5 cm at the bottom provided the boiler front panel can be removed and the isolating valves are easily accessible without the use of tools”

ﬁ g. 04 Clearance requirements

112952.LT.GB.W7H.003

min.600

Remeha Avanta Plus

670

300

74.5

132.5

73.3(2x)

71.5

160

328.5

400

379

2.2.2 Dimensions and connection points.

System type

 Return connection Ø 22 mm  Flow connection Ø 22 mm  Gas connection Ø 22 mm  Combustion air inlet Ø 100 mm (concentric)  Flue duct Ø 60 mm (concentric)  Condensate drain connection ¾”

(standard overflow pipe size)

 Connection safety valve Ø 15 mm

584106

26.5

180.75 200

312.5

146.7

141.7

24 systeem

30.5

148

ﬁ g. 05 Dimensions and connection points of the Remeha Avanta

Plus system

112952.LT.GB.W7H.005

400

670

300

74.5

79.8(2x)

132.5

71.5

73.3(2x)

160

328.5

379

Combi type

 Return connection Ø 22 mm  Flow connection Ø 22 mm  Gas connection Ø 22 mm  Combustion air inlet Ø 100 mm (concentric)  Flue duct Ø 60 mm (concentric)  DHW inlet (cold) connection Ø 15 mm  DHW outlet (hot) connection Ø 15 mm  Condensate drain connection ¾” (standard overflow pipe

size)

 Connection safety valve Ø 15 mm



• Based on the guidelines and the required installation space, determine where to mount the Remeha Avanta Plus.

• In determining the boiler position, consider carefully the

584106

flue outlet position and any pluming consequences.

26.5

114

180.75 200

247.5

312.5

146.7

141.7

30.5

combi

148

ﬁ g. 06 Dimensions and connection points of the Remeha Avanta

Plus combi

112952.LT.GB.W7H.002

ø10 mm

Remeha Avanta Plus

2.2.3 Mounting the Remeha Avanta Plus

• Remove the mounting plate and template from the box.

• Using the template determine and mark the position of the three mounting holes and center line of flue, making sure the plate is absolutely level.

• Drill the (Ø 10 mm) holes.

• Fit the (Ø 10 mm) plugs.

• Fit (Ø 8 mm) screws into the plugs.

• Check the mounting plate is level and tighten the screws.

• Fit the valve set to the mounting plate.

• Fit fibre washers on the CH valves.

• Remove boiler from the box and suspend it on mounting plate.

• Connect the valves to the boiler remembering to fit fibre washers supplied.

• Connect the supplied copper tails to the isolating valves.



• The boiler should be mounted on a suitable vertical wall

which is able to support the weight of the boiler.

• The boiler should be mounted in a room which, even during

severe cold weather, remains frost-free.

• If the boiler is to be installed in a timber framed building,

please refer to British Gas publication: ‘Guide for Gas Installations in Timber frame Housing’, reference DM2.

• In a new installation it is possible to fit just the wall plate and

valve set to enable the system pipework to be completed and tested before fitting the boiler at a later date (place fibre washers supplied in a safe place for use when fitting the boiler).

ﬁ g. 07 Mounting the Avanta Plus

112952.LT.GB.W7H.012



• Make sure the boiler and any open connections are

protected from building dust etc. during the installation.

• There must be a 3 amp fused switched spur within 1m of

the boiler.

• Provision must be made for the condensate discharge.

2.3 Water-side connections

2.3.1 Water flow

An internal automatic flow by-pass is supplied in the Avanta Plus to ensure correct operation on systems fitted with TRV’s on all heat emitters. The ‘abc perature difference across the flow and return connections and the rate of temperature rise and will automatically regulate the boiler output to ensure that it remains operational for as long as possible without the need to ‘lock out’ requiring a manual re-set.

’ control also monitors the tem-

600

500

400

300

200

Residual head [mbar]

100

0 200 400 600 800 1000 1200

Residual head UPR 15-60

dT 20°C 18kW

Pump 'high'

Pump 'low'

CH-flow [l/h]

ﬁ g. 08 Graph residual head UPR 15-60 for the CH installation with

Avanta Plus 18s, 24s, 30s, 24c and 28c

LT.AL.W7H.000.013

700

600

500

400

300

Residual head [mbar]

200

100

0 200 400 600 800 1000 1200 1400 1600

Residual head UPR 15-70

Pump 'high'

Pump 'low'

CH- flow [l/h]

dT 20°C 28kW

ﬁ g. 09 Graph residual head UPR 15-70 for the CH installation with

Avanta Plus 35c and 39c

LT.AL.W7H.000.014

2.3.2 Circulation pumps

The Remeha Avanta Plus 18s, 24s, 30s, 24c and 28c are fitted with the Grundfos UPR 15-60 and the Avanta Plus 35c and 39c with the UPR 15-70, two-speed circulation pumps. The control unit ensures that when the hot-water function is active, the pump runs at ‘high’. The factory setting of the pump for CH function is ‘low.’ If necessary, the service installer can adjust this to ‘high’ by switching parameter 21 (from 0 to 1) see par. 2.9.8.

2.3.3 Additional guidelines for the domestic and CH water

• The system should be filled with mains cold water (for the

UK this will usually have a pH of between 7 and 8).

• Flush the pipes and radiators thoroughly to remove all fluxes

and debris before connecting the boiler to the central heating system.



• The temperature of the central heating pipes and the

radiators can rise to 95°C.

• Use untreated tap water only to fill the CH system.

• The pH value of the system water must be between 6 and 9

• In case inhibitors are being used, please follow the

instructions given in par. 2.3.4.

2.3.4 Water treatment

If used correctly water treatment can improve the boilers efficiency and increase the anticipated life expectancy of the boiler. For further information a special document “Quality requirements CH water” is available from Broag.

As most systems contain a variety of metals, it is considered good practice to provide some form of water treatment in order to prevent or reduce the following:

• Metallic corrosion

• Formation of scale and sludge

• Microbiological contamination

• Chemical changes in the untreated system water



All scale deposits however small will reduce the efficiency of the boiler and should be prevented.

Suitable chemicals and their use should be discussed with a specialist water treatment company prior to carrying out any work (environmental aspects, health aspects). The specification of the system and manufacturers recommendations must be taken into account, along with the age and condition of the system. New systems should be flushed thoroughly to BS 7593(1992) to remove all traces of flux, debris, grease and metal swarf generated during installation. Care to be taken with old systems to ensure any black metallic iron oxide sludge and other corrosive residues are removed, again by power flushing, ensuring that the system is drained completely from all low points.

Remeha Avanta Plus



Please ensure that the new boiler plant is not in circuit when the flushing takes place, especially if cleansing chemicals are used to assist the process.

It is important to check the inhibitor concentration after installation, system modifications, filling the system and every service in accordance with these instructions.

For the correct dosage and the suitability of inhibitors for use with our boilers and for further information on water treatment or system cleaning we advise direct contact with either of the following companies:

’ manufactured by:

‘F1

Fernox, Cookson Electronics Forsyth Road Sheerwater Woking Surrey GU21 5RZ Tel No: 01483 793200 Fax No: 01483 793201 Email: admin@fernox.com Web site: www.fernox.com

or:

Sentinal ‘X100

Sentinel Performance Solutions The Heath Business & Technical Park Runcorn Cheshire, WA7 4QX Tel No: 0800 389 4670 Fax No: 0800 389 4677 Email: info.uk@sentinel-solutions.net Web site: www.sentinel-solutions.net

2.3.5 Safety valve discharge

A pressure relief safety valve is fitted in the boiler set to the maximum operating pressure of the boiler of 3 bar. If the pressure in the boiler becomes too high the pressure is relieved by releasing water to outside via the safety valve discharge pipe. The discharge pipe should be fitted in accordance with British Standards and must be at least 15 mm Ø. The pipe should be positioned so that the discharge of water or steam is visible and cannot create a hazard to the occupants of the premises or damage the electric components and wiring. In addition the discharge should be located where it is unlikely to cause damage to the premises.

’ manufactured by

2.3.6 Expansion vessel

An 8 litre expansion vessel (with the vessel charge set to 1.0 bar) is fitted as standard within the boiler case and is suitable for use in a heating system with a water content up to 100 litres, operating at a flow temperature of 80°C, a maximum pressure of 3 bar and a maximum system static head of 5 metres above the boiler. If the system water content is greater than 100 litres, or the system static head above the boiler is greater than 5 m, an additional vessel must be installed in the system to allow for the increase in expansion, see table 01.



Install additional vessel according BS 5449, part1.

Boiler Safety Valve Setting

(Bar) 3.0

Vessel Charge (Bar) 0.5 1 1.5

Heating System Water Content

(Litres)

Expansion Vessel Size

(Litres)

100 4.8 8.0 13.3 125 6.0 10.0 16.6 150 7.2 12.0 20.0 175 8.4 14.0 23.3 200 9.6 16.0 26.6 250 12.0 20.0 33.3 300 14.4 24.0 39.9

For other system volumes, mul-

tiply the system volume by the

0.048 0.080 0.133

factor across:

table 01 Expansion Vessel Size

ﬁ g. 10 Connecting DHW pipes

LT.AL.W7H.000.015

2.3.7 Connecting DHW pipes

(For combi type only)

• Fit the outlet pipe for hot water to the DHW outlet  15

mm Ø connection.

• Fit the inlet pipe for cold water to the DHW inlet  15 mm

Ø connection.



• The DHW pipes must be connected in accordance with

current regulations.

• For plastic pipes, follow the manufacturer’s instructions

(for connection).

Remeha Avanta Plus

2.3.8 Connecting the ‘CH return’

• Fit the inlet pipe for CH water to the ‘CH return’  22 mm

Ø connection.



The Remeha Avanta Plus has a drain cock built into the return isolating valve It is considered good practice to install an air separator / dirt removal device in the return to the boiler.

ﬁ g. 11 Connecting CH return

LT.AL.W7H.000.016

2.3.9 Connecting ‘CH flow’

• Fit the outlet pipe for CH water to the ‘CH flow’  22 mm

Ø connection.



The Remeha Avanta Plus has a drain cock built into the flow isolating valve.

ﬁ g. 12 Connecting CH ﬂ ow

LT.AL.W7H.000.017

ﬁ g. 13 Connecting condensate drain

LT.AL.W7H.000.018

2.3.10 Connecting condensate drain

• Connect the condensate drain outlet  to a suitable waste

water drain point using acid resisting pipe work (i.e. - ¾” overflow). To enable the siphon in the boiler to be removed / serviced, the connection should not be a permanent one (i.e. “push fit” system).

• To prevent the risk of freezing connect the condensate into

an internal vertical soil pipe using a tundish (air break) c/w a min 75 mm water seal trap.

• If the condensate pipe has to run externally make sure

this is done by realizing the shortest possible route, and increase the diameter to at least 1¼” or insulate it with weather resistant insulation.

• The drain should slope at least 3 cm per meter, with a maxi-

mum horizontal length of 5 m.



• If connecting into an internal discharge branch (i.e. sink

waste etc.) the connection should preferably be down stream of the existing waste trap.

• Fill the boiler siphon with water before operation, to prevent

flue gasses discharging into the room.

• The condensate drain must be connected in accordance

with current regulations.

2.3.11 Connecting under floor heating

The Remeha Avanta Plus can be connected directly to an under floor heating system. If plastic pipes have been used they must be made oxygen diffusion proof in compliance with DIN 4726/4729 When installing under floor heating with a separate pump, the layout should be such that the under floor heating pump cannot cause a flow to the boiler if there is no heat demand. A low loss header should therefore be fitted between the system and the boiler.



Please ensure that the residual pump duty of the boiler is sufficient for the resistance of the under floor system. If not a low loss header should be used to separate the boiler from the under floor circuit to allow a separate pump sized for the resistance of the under floor system to be used.

2.4 Gas-side connections

2.4.1 Additional guidelines for gas connections



Before installation, check that the gas meter has sufficient capacity for the demand. Remember to consider the consumption of all household appliances.

ﬁ g. 14 Connecting gas supply

LT.AL.W7H.000.019

Remeha Avanta Plus

2.4.2 Adjusting boiler to other gas-type

The Avanta Plus boilers are suitable for both natural gas and propane firing. For propane a kit with restrictor is required. For Avanta Plus 39c a LPG conversion set with restrictor and burner is needed. The boilers are supplied as standard set for natural gas (G20), therefore the following procedure must be carried out BEFORE the boilers are fired and commissioned for the first time on propane: Fit the conversion kit (instructions included in kit) Adjust the fan speed (see Par. 2.9.8) and adjust the gas/air ratio (see Par. 2.9.3).

2.4.3 Connecting the gas supply

• Before starting any work on the gas supply, turn off the main isolation valve.

• Connect the gas supply  to the 22 mm Ø boiler

connection.



• Make sure there is no dirt in the gas pipe. Blow through the

pipe before installation or tap well to purge.

• The principle of the 1:1 gas valve ensures the Avanta range

is able to deliver it’s full output at inlet pressure down to 17 mbar. However if dynamic pressure below 19 mbar are experienced ensure this is adequate for ALL other gas appliances in the property.

• Preferably install a gas filter in the gas pipe to prevent the

gas block from getting dirty.

• The gas supply must be connected, tested for soundness

and purged by a qualified Engineer and in accordance with BS6891.

2.5 Flue terminal and air supply connections

The Remeha Avanta Plus is only suitable for room sealed operation with a standard concentric connection 60/100 mm Ø or the optional 80/125 mm Ø connection. Detailed recommendations for air supply and flue terminals are given in BS 5440.



It should not be necessary to provide compartment ventilation when the boiler is used with a standard concentric flue.

2.5.1 Flue terminal positions

The flue terminal must be located with care to ensure that the products of combustion are dispersed properly in all weather conditions and cause minimum nuisance to the building user or any adjacent buildings. If the terminal is positioned less than 2 m above the ground, balcony, or flat roof where access by persons is possible a suitable guard must be employed.



The boiler will produce a water vapour plume during normal operation.

Positions for the Remeha Avanta and table 02.

Plus are shown in the figure

600 mm

ﬁ g. 15 Flue terminal positions

LT.AL.W7H.000.020

600 mm

2000 mm

D,E

Dimensions

No flue must penetrate area within dotted lines round roof light

Terminal location Minimum

distance (in mm) to terminal (room sealed)

A Directly below an opening, air brick,

opening window, etc.

K,N

B Above an opening, air brick, opening

window, etc.

C Horizontally to an opening, air brick,

opening window, etc.

D Below a gutter or sanitary pipe work 75

300

E Below the eaves 200

F Below a balcony or carport roof 200 G Above ground, roof or balcony level 300 H From vertical drain/soil pipe work 150

J From an internal or external corner 300 K From a surface or boundary facing

the terminal

L Vertically from a terminal on same

wall

M Horizontally from a terminal on same

wall

1500

300

N From a terminal facing the terminal 1200 P From an opening in a carport (e.g.

door, window) into the building

1200

R From a vertical structure on the roof n/a S Above an intersection with the roof 300

VRS roof mounted room sealed terminal

112952.LT.GB.W7H.065

112952.LT.GB.W7H.066

80/125 or 60/100

Diameter in mm Ø

Maximum length ‘L’ allowed [m]

Eq. Length of 90° elbow

LT W6H 000 031

Eq. Length of 45° elbow

LT W6H 000 032

table 02 Minimum distances to terminal

n/a = not applicable.

2.5.2 Room sealed flue

See table 03 for the maximum pipe length of flue ducts and air supply pipes for this ‘room sealed’ application. It is not necessary to provide combustion air to the room or internal space in which the boiler is installed.

18s/24s/30s 24c/28c 35c 39c

60/100 80/125 60/100 80/125 60/100 80/125 60/100 80/125

6 29 6 29 7 30 5 25

1.4

0.65

table 03 Maximum pipe lengths for ﬂ ue duct and air supply

in room sealed application

VRS roof mounted room sealed terminal

Remeha Avanta Plus



For flue installations not covered by this booklet, please contact our technical help line 0118 978 3434.

2.5.3 Connecting the flue terminal and air supply

• How to install the horizontal or vertical flue terminal and air supply kits; please take note of the mounting instructions supplied with it.



• All connections must be airtight and waterproof.

• Horizontal extension sections should slope towards the

boiler (at least 3 cm per metre).

80/125 or 60/100

ﬁ g. 16 Connecting ﬂ ue terminal and air supply

112952.LT.GB.W7H.065 + 112952.LT.GB.W7H.066

230 V

2.6 Electrical connection

• Connect the boiler to the fused (3 amp) switch spur unit adjacent to boiler.

• The switch unit must always be accessible.



When the switch spur is on the following components of this appliance can be live (230 V):

• electrical connection pump;

• electrical connection gas combination block;

• electrical connection three-way valve;

• most parts of the control unit;

• ignition transformer;

• X1, X2, X4, X5, X6 and X7 terminal block;

• 230 V supply cable connection.

ﬁ g. 17 Electrical components with live 230 V

112952.LT.GB.W7H.022

ﬁ g. 18 The control unit

LT.AL.W7H.000.023

2.6.1 The control unit

The Remeha Avanta Plus has an electronic regulation and control unit with an integrated ionisation flame detector. The heart of the boiler control unit is a microprocessor, the ‘abc which controls and protects the boiler.

The maximum rated input is between 115 and 180 W (depending on boiler type). The boiler is fully pre-wired internally, all external connections can be made using the terminal blocks X5 - X7 - X9 and 230 V input (X2 terminal). See the diagram for the position of the connectors and fuse (F2) on the control unit. The most important properties of the control unit are summarized in table 04.

®’

Remeha Avanta Plus

Manufacturer Sit Controls Supply voltage 230 V – 1ph – 50 Hz Pre-purge time 3 s Post-purge time 5 s Ignition time 2.5 s Safety time 5 s Anti-cycling time 3 till 10 min. Fuse value F1 (230 V) 2 AT DC fan 24 VDC

table 04 Control unit characteristics



Any loads other than those specified above are only allowed if an isolating transformer is used.

The output of the Remeha Avanta Plus can be controlled in the following ways: Options

1. On/off control – volt free switching - The boilers internal

control will modulate the output to achieve the flow temperature set point of the boiler. This contact is on the connectors 7 and 8 on terminal block X9 (low voltage only).

2. Modulated control – Open Therm - The external controls

will modulate the boiler’s output to achieve the flow temperature determined by the modulating regulator. This contact is on the connectors 7 and 8 on terminal block X9 (low voltage only).

3. On/off control – 230 V switching - The boilers internal

control will modulate the output to achieve the flow temperature set point of the boiler. This contact is on the connector 1 on terminal block X2 (230 VAC only).

Modulated control – Open Therm in combination with an

externally mounted simple 230 V switching time clock -

The boiler will provide room compensated heating and time control over CH and DHW (System boiler), use options 1 & 2.

ﬁ g. 19 Connecting external controls

LT.AL.W7H.000.024



• All connections on terminal X1, X2, X4, X5, X6 and X7 are 230 VAC.

• All connections on terminal X9 are low voltage only.

2.7 Connecting external controls

• Release the two screws at the bottom of the front casing and remove the front casing.

• Feed the cables through the grommet in the base of the boiler.

• Connect the cables to the relevant connectors, as shown in the diagrams.



• Isolate power supply at the fused spur before carrying out

any work on the boiler controls.

Terminal Block X6

L N

Terminal Block X7

230v - 3 Amp Power Supply

Exist links

Terminal Block X5

Terminal Block X9

Common Alarm (Closes on alarm)

Neutral

Open valve to DHW (230v)

Open valve to HTG (230v)

Outside sensor (red band) for direct boiler weather compensation or when used in conjuction with a compatable Open Therm control eg: Chronotherm or Celcia 20

DHW sensor (red band) or volt free thermostat (make on temp fall) Remove existing link to use this function

External interlock (volt free) Remove existing link to use function

Modulating - using Open Therm control eg: Honeywell Chronotherm or Celcia 20 On / Off - using volt free switching control eg: Celcia 10 or low volt room thermostat

Boiler Run or external pump relay (Closes on run)

For external DHW priority diverting valve on System boiler when used in conjunction with "Open Therm" compensation

Exist links

Terminal Block X2

54N

Power supply to external time clock -230v

Switch live (230v) from external time clock DHW demand Remove existing link 4-3 to use this function

Switch live (230v) from external time clock HTG demand Remove existing link 4-1 to use this function

NOTE: Terminal blocks are not in line as shown - diagramatic only

ﬁ g. 20 Boiler External Connection terminal details

LT.AL.W7H.000.025f

Terminal Block X9

Exist links

Modulating - using Open Therm control eg: Honeywell Chronotherm or Celcia 20 On / Off - using simple volt free switching control

ﬁ g. 21 Wiring diagram on/off control

LT.AL.W7H.000.026c

Remeha Avanta Plus

2.7.1 On/off control – room temperature (volt free

switching)

The Remeha Avanta Plus can be connected to a 2-wire on/ off volt free heating control, programmer or thermostat, ie Remeha Celcia 10. Mount the thermostat in a reference room usually the living room.

• Remove existing link between connectors 7 and 8 of the X9 terminal block before use;

• Connect the 2-wire programmer or room thermostat to connectors 7 and 8 of the X9 terminal block.



If a room thermostat with an anticipation resistor is being used, parameter p5 should be changed from 0 to 1, see par.

2.9.8.

2.7.2 Time control using an internal or external

230 V clock



When the switch spur is on, the terminal block X2 will be live (230 V).

Terminal Block X2

Power supply to external time clock -230v

4NL

Switch live (230v) from external time clock DHW demand

3 Exist links

Remove existing link 4-3 to use this function

Switch live (230v) from external time clock HTG demand

Remove existing link 4-1 to use this function

ﬁ g. 22 Wiring diagram for an external 230 V time clock

LT.AL.W7H.000.027

• A 230 V two channel time clock for CH and DHW control can be connected to the Remeha Avanta Plus

Live 230 V supply for the time clock - connect to connectors

4 (L) and 5 (N) on X2 terminal block.

• For CH - remove existing link between connectors 4 and 1 of the X2 terminal block and connect the 230 V output from the time clock to terminal 1 on the terminal block X2.

• For DHW - remove existing link between connectors 4 and 3 of the X2 terminal block and connect the 230 V output from the time clock to terminal 3 on the terminal block X2.



For this option to function correctly a link or room control must be fitted between connectors 7 and 8 of X9 terminal block (remove existing link before use). For continuous DHW on, when using a combi boiler, the link across connectors 3 and 4 MUST NOT be removed If the 230 V supply for the external time clock is not taken from the boiler – terminal block X2 connections 4 & 5, it must be taken from the same phase as the boiler 230cv supply and correct polarities observed.

2.7.3 Connecting a 230 V time clock in combination with a modulating room control

With an externally mounted simple 230 V switching time clock connected to connectors on X2 terminal block and a Celcia 15 connected to connectors 7 and 8 of X9 terminal block (remove existing link between connectors 7 and 8 before use), the Remeha Avanta Plus will provide room compensated heating and time control over CH and DHW (System boiler).

Terminal Block X9

Exist links

Modulating - using Open Therm control eg: Honeywell Chronotherm or Celcia 20 On / Off - using simple volt free switching control

ﬁ g. 23 Wiring diagram modulating regulator

LT.AL.W7H.000.028c



An OpenTherm

room modulating control (Celcia 15) used in conjunction with a simple external 230 V time clock will provide easy to set up and operate - timed room compensation heating

2.7.4 Modulating control – room or outside

compensation

The Remeha Avanta Plus has an OpenTherm enables our modulating range of OpenTherm

interface. This

room controls (e.g. the Remeha Celcia 15 or 20) to be connected without any further modifications.

• Mount the control in a reference room (usually the living

room).

• Connect the two-wire interface cables to connectors 7 and 8

of the X9 terminal block (remove existing link between connectors 7 and 8 before use).

• When using the Celcia 20 it is possible to add the outside

sensor to provide weather compensation. Connect the outside sensor to connectors 1 and 2 of the X9 terminal block.

Remeha Avanta Plus

If the DHW water temperature on the OpenTherm® control can be adjusted, then the Remeha Avanta Plus will supply water at the temperature determined on the OpenTherm maximum being set in the boiler. OpenTherm

is an industry standard modulating control avail-

able from several control manufacturers.



The Remeha Avanta Plus

can therefore be controlled directly

by any other controls with this OpenTherm

logo

with the

Terminal Block X9

Outside sensor (red band) for direct boiler weather compensation or when used in conjuction with a compatable Open Therm control eg: Chronotherm or Celcia 20

Exist links

ﬁ g. 24 Wiring diagram outside temperature sensor

LT.AL.W7H.000.029e

Factory setting

2.7.5 Connecting an outside temperature sensor

An outside temperature sensor can be connected to connectors 1 and 2 of the X9 terminal block. The boiler will regulate the output using the set point of the internal heat curve. This can be set as follows:

- Outside temperature minimum set point = -15°C (adjustable

with parameter p29 to between 0 and -30°C)

- Outside temperature maximum set point = 20°C (adjustable

with parameter p28 to between 0 and 40°C)

- Flow temperature set point at maximum outside tempera-

ture = 20°C (adjustable with parameter p27 to between

0 and 60°C)

- Flow temperature set point at minimum outside temperature = 20°C (adjustable with parameter p1 to between 20 and 85°C)



An outside sensor used in conjunction with a simple 230 V time clock will provide easy to set up and operate - timed weather compensation heating based on the above graph.

01020-15

ﬁ g. 25 Heat curve Remeha Avanta Plus

LT.AL.W7H.000.030

Terminal Block X9

DHW sensor (red band) or volt free thermostat (make on temp fall)

Exist links

ﬁ g. 26 Wiring diagram DHW caloriﬁ er sensor or thermostat

LT.AL.W7H.000.031c

Ter min al Block X9

Exist links

Modulating - using Open Therm control eg: Honeywell Chronotherm or Celcia 20 On / Off - using simple volt free switching control

ﬁ g. 27 Wiring diagram for frost thermostat

LT.AL.W7H.000.032c

2.7.6 Connecting the DHW sensor/thermostat

• If an external DHW calorifier is being used with the Avanta

Plus system boiler a volt-free DHW control sensor or thermostat can be connected to connectors 3 and 4 of the X9 terminal block. The control will automatically detect whether a sensor or a thermostat has been connected.

• For continuous DHW when using a combi boiler, the existing

link between connectors 3 and 4 of the X2 terminal block must not be removed.

2.7.7 Connecting a frost thermostat

The boiler must be installed in a frost-free area to prevent the condensate drain from freezing. However if the temperature of the CH water in the boiler drops too low, the integrated boiler protection device is activated as follows:

- at a water temperature below 7°C: the circulation pump is switched on;

- at a water temperature below 3°C: the boiler is switched on;

- when the water temperature is above 10°C: the boiler is switched off and the circulation pump runs for another 15 minutes.



• A frost thermostat should preferably be installed in rooms with a high frost risk.

• Connect the frost thermostat in parallel to the room thermo stat - connectors 7 and 8 of the X9 terminal block (remove existing link between connectors 7 and 8 before use).



If a 230 V switching time clock is connected to terminal block X2, the frost thermostat wired as indicated (on connectors 7 and 8 of the X9 terminal block) it will not bring the boiler on if the time clock is in the OFF position. In these cases the frost stat must be connected in parallel with the time clock on connectors 1 and 4 of the X2 terminal block (frost stat contacts to close on temperature fall).



• The integrated boiler protection described above will not provide complete system or fabric protection.

• When a Celcia 20 control has been fitted to connectors 7 and 8 on X9 (see Par. 2.7.4) an outside sensor as detailed in Par. 2.7.5) must be used to provide system and building fabric frost protection.

• If a frost thermostat is connected parallel to the Celcia on connectors 7 and 8 on X9, when the frost thermostat calls for heat (contact closed) it will override the Celcia 20 control

and cause an error message (OT ERROR) flashes in the display and the boiler will operate continuously to achieve the flow set point.

Terminal Block X9

Exist links

External interlock (volt free) Remove existing link to use this function

ﬁ g. 28 Wiring diagram for an external interlock

LT.AL.W7H.000.033d

Remeha Avanta Plus

2.7.8 Connecting an external interlock

The Remeha Avanta Plus is supplied with an external interlock function. A volt free switching device (i.e. external gas pressure switch, safety thermostat for under floor heating) can be connected to connectors 5 and 6 of the X9 terminal block after removing the existing link. When this circuit is open the boiler will shut down with the display showing (code 9) and will restart when the circuit is closed.

2.7.9 Connecting remote alarm, boiler run indication and external pump relay

As standard the boiler is supplied with 3 volt free connectors on terminal X7. They can be used for an external gas valve, remote alarm and boiler run indication.

• Common alarm signal connect to connectors 1 and 2 on

terminal X7. Contact closes on lock out. For this purpose set parameter 24 from 0 to 1.

• Boiler run signal connect to connectors 1 and 3 on terminal

X7. Contact closes on heat demand. For this purpose set parameter 24 from 0 to 2.

• Connect an external gas valve to connectors 1 and 3 on

terminal X7. Contact closes when the gas valve is activated. For this purpose set parameter 24 from 0 to 3.

• Connect an external pump relay* to connectors 1 and 3 on

terminal X7. Contact closes on heat demand. For this purpose set parameter 24 from 0 to 4.

Terminal Block X7

Common Alarm (Closes on alarm)

ﬁ g. 29 Connecting remote alarm

LT.AL.W7H.000.034d

Boiler Run or external pump relay (Closes on run)

* never connect a pump directly to connectors 1 and 3

on terminal X7, but only via a relay.

2.7.10 Connecting a PC/PDA

Using the optional Recom interface package a PC or PDA can be connected to the X10 “telephone connector”. Using the Recom PDA service software you can load, change and download various boiler settings and readings. See the user instructions supplied with the software/hardware.

X10

ﬁ g. 30 X10 socket connector

LT.AL.W7H.000.035

X15

X13

X10

2.8 Wiring diagram

X6X0

L N

1 2

Power supply 230V, 50Hz

4 5 1 3 2X21 2 3 4 5X31 2 3 4X41 2 3 4

BKBRBL

123

GCV BP

GN/YW

1 2 3

GN/YW

1 2 3 1 10

NC.

COMM.

1 2 3 4X91 2 3 4 5 6 7 8

NO.

1542

X81X21X22

FAN

4 1 3 7 5 6 8

RDWHBL

Blocking up entry

DHW sensor/thermostat

Compensator / Open Therm

12 12 12

X134 X133 X131

X13

X15X5

WIRE COLOURS

BK BLACK BL BLUE BR BROWN GN GREEN GN/YW GREEN/YELLOW GY GRAY RD RED WH WHITE YW YELLOW

BOILER COMPONENTS

As Flow sensor BP Boiler pump Fs Flow switch CP Circulation pump DV 3-way valve GCV Gas combination valve HLT High limit thermostat Os Outdoor sensor Rs Return sensor

- - - - Will not be supplied or wired.

ﬁ g. 31 Wiring diagram

LT.AL.W7H.000.234e

* Remove existing link between connectors before use

RsAs

123

X132

123

X132A

X131A

HLT

1 10

2345

ﬁ g. 32 Control Panel

LT.AL.W7H.000.036

1 = display 2 = [reset] key 3 = [-] key 4 = [+] key 5 = [enter] key

At the time of commissioning, complete all relevant sections of the Benchmark Checklist located on the inside back of this document.

Remeha Avanta Plus

2.9 Commissioning

2.9.1 Control Panel

The control panel of the Remeha Avanta Plus has 4 function keys and a LED display. The function keys are used to read or change the settings and temperatures.

The display has two positions and displays information on the current operating status of the boiler and any errors. Numbers, dots and/or letters can appear in the display. The symbols above the function keys indicate what the function of that particular key then is.

If no key is pressed for longer than three minutes with the “boiler in stand-by mode”, only one LED is lit. With the “boiler operating”, two LED’s are displayed.

• Press any key and the current boiler status and operation

code will appear in the display.

• In the event of a fault, the fault code is displayed instead of

the dots.

2.9.2 Additional guidelines for commissioning

• When commissioning, complete all relevant sections of the

Benchmark Commissioning Checklist, located on the inside back of this document.

• Work through all the stages of this section, and send a copy

of the completed commissioning details to Broag along with the completed registration card in the supplied warranty leaflet.

• The boiler is supplied as standard for use with Natural Gas

and tested at an operating pressure of 20 mbar.

ﬁ g. 33 Benchmark Checklist

T002019



The boiler must not be put into operation with a different type of gas without reference to Par. 2.4.2

2.9.3 Putting the boiler into operation

This section details the procedure for putting the boiler into operation. There are 7 stages to the procedure:

1. Isolating the power supply and opening the front cover;

2. Checking the connections and making the boiler operational;

3. Switching the boiler on and setting the controls;

4. Checking/setting the gas/air ratio at full load;

5. Checking/setting the gas/air ratio at low load;

6. Making the boiler ready for use;

7. Instructing the user.

1. Isolating the power supply and opening the front cover

230 V

• Switch off the boiler at the fused spur and remove the fuse;

• Remove the front panel (release the two screws at the bottom of the front panel, pull the bottom of the panel; forward and lift off the two pins on the top of the main casing).

ﬁ g. 34 Isolating power

LT.AL.W7H.000.037

ﬁ g. 35 Open the valves

112952.LT.GB.W7H.038

2. Checking the connections and making the boiler

operational



Open the valves on all the radiators connected to the central heating system before filling the system with water.

• Open the valves on all the radiators connected to the central

heating system;

• Fill the system with water to the design operating pressure (normal for a one/two storey house 1.2 bar, minimum pressure 1 bar, maximum pressure 2.5 bar);

• Whilst filling, air from the system will escape through the automatic air vents and the pump.



• When the vent caps start leaking water, close them with the

1,2 bar

vent caps supplied attached to gas combination block.

• Avoid water getting into the boiler.

• Check the condensate siphon. This should be filled to the

mark with clean water if necessary.

Check

• Check the integral boiler pump – remove chrome centre screw to vent pump and spin the shaft to check that the impellor can move freely;

• Check that all boiler connections are watertight;

ﬁ g. 36 Measurement point c on the gas block

LT.AL.W7H.000.039

Remeha Avanta Plus

• Open the boiler gas valve and check the static pressure to the boiler at the measurement point (C) on the gas block.



The boiler has been factory tested for natural gas at 20 mbar.

Check

The minimum gas inlet pressure is 17 mbar for natural gas (see 2.4.3).

• Check that the gas supply to the boiler is gas tight (in compliance with the current regulations, see Chapter 7 the maximum test pressure at the gas pipe inlet, with the boiler gas valve open, is 60 mbar.

• Vent the gas pipe by unscrewing the measurement point (C) on the gas block (tighten it again as soon as the pipe is fully vented).

• Check that the gas connections in the boiler are sealed.

• Check that all electrical connections, including the earth connection, have been made correctly.

• Check the electrical connections to the thermostat and other external controls.

• Check that the flue-gas and air-supply connections are sealed.

ﬁ g. 37 Check electrical connections and thermostat

112952.LT.GB.W7H.040

3. Switching the boiler on and setting the controls

• Replace the fuse in the spur and switch on the 230 V power supply.

• Set the controls to heat demand.

• The boiler will begin an automatic venting-programme (which lasts approx. 3 minutes) and will do this every time the power supply is isolated.

• The boiler now starts to run. The operational status is shown in the display. The normal operating status finally shows 0 in the display.

4. Checking/setting the gas/air ratio at full load

The Avanta Plus boilers are suitable for both natural gas and propane firing. An optional propane-set is needed (see par.

2.4.2).

The boilers are supplied as standard set for natural gas

(G20), therefore the following procedure must be carried out BEFORE the boilers are fired and commissioned for the first time on propane:

- Fit propane set (instruction in kit);

- adjust the fan speed (for procedure; see Par. 2.9.8, for val-

ues; see table 06 and table 08) and;

- adjust the gas/air ratio (for values; see table 06 and table

08).

230 V

ﬁ g. 38 Power on and controls on heat demand

112952.LT.GB.W7H.041

ﬁ g. 39 Check the gas/air ratio control – set to full load – gas/air ratio

adjustment A on gas block

112952.LT.GB.W7H.042



Combustion checking/setting must be carried out by a competent person. It must not be carried out unless that person is equipped with a combustion analyser which conforms to the relevant British Standards.



When checking/setting the air/gas ratio setting in full load it may be necessary to run water through the domestic hot water circuit to allow time for this part of the procedure, this will prevent the boiler from cycling on low heating demands (Combi boilers only).

Setting values O2/CO2 for natural gas H / L

Fan speed (rpm) O

Boiler type

Full load h3 *)

18s approx. 3500

24s approx. 4300

30s approx. 5200

24c approx. 4400

28c approx. 5500

35c approx. 6300

39c approx. 6700

table 05 Setting values full load CO

and O2

% %

5.2

± 0.1

5.2

± 0.1

5.2

± 0.1

5.2

± 0.1

5.2

± 0.1

5.2

± 0.1

5.2

± 0.1

8.8

± 0.1

8.8

± 0.1

8.8

± 0.1

8.8

± 0.1

8.8

± 0.1

8.8

± 0.1

8.8

± 0.1

(front panel not ﬁ tted)

Setting values O

Fan speed (rpm) O

Boiler type

Full load h3 *)

18s Approx. 3300

24s approx. 4100

30s approx. 5000

24c approx. 4300

28c approx. 5200

35c approx. 5800

39c approx. 6500

table 06 Setting values full load CO

(front panel not ﬁ tted)

*) On forced full load, the 2

/CO2 for LPG (propane)

% %

and O2

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

digit indicates the operating code

Remeha Avanta Plus

• Unscrew the flue gas sampling cap and connect the flue gas analyser.

• Set boiler to full load: Press the [enter]- key, keep it pressed and also press the [+]-key until h3 appears in the display; full load has been set.

• Once the unit has reached the full-load fan speed, measure the O

/CO2-percentage and compare this to the values in

table 05.

• If the values are not in accordance with the table then correct the gas /air ratio controls using the adjusting screw A on the gas block.

• If the value is too low turn the screw A anti clockwise; this increases the gas rate – if the value is too high turn the screw clockwise which decreases the gas rate.

• Check the flame through the sight glass which should be stable with a regular blue distribution.



Only make small adjustments of the adjusting screw, maximum 1/8 turns when setting O



Ensure that the analysing probe has a gas tight seal in the sampling point with the probe end in the centre of the flue duct.

/CO



After setting the O

/CO2 level to the right value, the maximum

CO level should not exceed 200 ppm for natural gas or not exceed 300 ppm for LPG (propane).

5. Checking/setting the gas/air ratio at part load

Checking/setting values O2/CO2 for natural gas (G20)

Fan speed (rpm) O

Boiler type

18s approx. 1300

Part load l3 *)

24s approx. 1300

30s approx. 1300

24c approx. 1300

28c approx. 1300

35c approx. 1300

39c approx. 1300

% %

5.2

± 0,1

5.2

± 0,1

5.2

± 0,1

5.2

± 0,1

5.2

± 0,1

5.2

± 0,1

5.2

± 0,1

8.8

± 0,1

8.8

± 0,1

8.8

± 0,1

8.8

± 0,1

8.8

± 0,1

8.8

± 0,1

8.8

± 0,1

ﬁ g. 40 Check the gas/air ratio control – set to part load – gas/air

ratio adjustment B on gas block

112952.LT.GB.W7H.043

table 07 Checking/setting values part load CO

panel not ﬁ tted)

and O2 (front

Checking/setting values O2/CO2 for LPG (propane)

Fan speed (rpm) O

Boiler type

18s approx. 2000

Part load l3 *)

24s approx. 2000

30s approx. 2000

24c approx. 2000

28c approx. 2000

35c approx. 2000

39c approx. 2000

% %

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

10.5

± 0.1

ﬁ g. 41 Preparing boiler for use

112952.LT.GB.W7H.044

table 08 Checking/setting values part load CO

and O2 (front

panel not ﬁ tted)

*) On forced part load, the 2nd digit indicates the operating code.

• Set boiler to part load: Press the [enter]- key until l3

appears in the display, part load has been set.

• Once the unit has reached the part load fan speed, measure the O

/CO2-percentage and compare this to the value in

table 07.

• If the values are not in accordance with the table then correct the gas /air ratio controls using the adjusting screw B on the gas block.

• If the value is too low turn the screw B clockwise; this increases the gas rate – if the value is too high turn the screw B anti clockwise which decreases the gas rate.

Check the flame through the sight glass which should be stable with a regular orange distribution. Once the unit has been set to part load, the ‘test at full load’ should be repeated.



Ensure that the analysing probe has a gas tight seal in the sampling point with the probe end in the centre of the flue duct.

• Repeat the ‘test at full load’ and ‘test at part load’ as often as necessary until the correct values are achieved without further adjustments.



Only make small adjustments of the adjusting screw; maximum 1/8 turns when setting O

/CO

2).

6. Preparing the boiler for use

• Remove the analysing probe and replace the cap on the flue gas sampling point.

• Refit the front panel and secure with the two screws again.

• Press [reset]-key for the boiler to return to the normal operating mode.

ﬁ g. 42 Instructing the user

112952.LT.GB.W7H.045

Remeha Avanta Plus



Following a manual override the boiler will return to normal operating mode if no keys are pressed for 15 minutes.

• Run the boiler on heating until the system reaches approx 70°C.

• Switch the boiler off (using the controls i.e. thermostat or time clock).

• Once the pump has turned off vent the system once again.

• Check the water pressure and add more water through the mains fill loop if necessary.

• Complete the type plate in the boiler by adding the gas type.

• Fill in Commissioning sheet, located on the inside back of this document.

The boiler is now ready for operation.



The Remeha Avanta Plus is delivered pre-tested and operating parameters set up with standard factory settings to suit the most common systems. These setting can be adjusted to suit specific site conditions but must not be changed without reference to Broag or one of our approved contractors.

7. Instructing the user

• It is the responsibility of the installer as part of the com-

missioning procedure to instruct the user in the day to day operation of the boiler and controls fitted to the system and to hand over the completed Benchmark Checklist at the back of this manual.

2.9.4 Normal start-up procedure

• Switch on the boiler at the fused spur unit and ensure that

the time control is in the on position and any other controls (i.e. room thermostat etc) calling for heat.

• The boiler will begin its start sequence.

The following sequence will appear in the display:

- A display test will briefly appear showing all segments of the

display.

f[ xx software version p[ xx parameter version

- A venting cycle of 3 minutes now follows, the version num-

bers will be displayed alternately;

- Next, the following will appear in the display:

[1 pre-purge stage [2 Ignition stage [3 operating in CH mode or: [4 operating in DHW mode [7 pump run on after CH or DHW is satisfied [0 stand-by mode

2.9.5 Error during the start-up procedure

• If the display is blank (should show LEDs or letters), check:

- 230 V main supply available to switch spur

- switch spur fuse

- cable and connections between the switched spur and the boiler control unit

- fuse on the boiler control unit (F2 = 2AT, 230V)

• An error code appearing in the display can be recognised as

follows:

é 10, (the display alternately shows an é and a number

e.g. 10). The meaning of this error codes can be found in the error table, see Chapter 4.

• Resolve the error first if possible.

• Press the [reset]- key and hold for at least 1 second to

restart the boiler.



After any error é1, é2, é7, é10 or é13 ; the 3 minute venting cycle will run first before starting the boiler.

• Checking DHW function;

- Turn on a hot water tap, the display shows:

[1 pre-purge stage [2 Ignition stage [4 operating in DHW mode

- Close the hot water tap, after a short time the display shows:

[1 pre-purge stage [7 pump run on after CH or DHW is satisfied [0 stand-by mode

• Checking CH function;

- Ensure the time control is in the CH on position

- Set the room thermostat on a high demanding temperature

and, the display shows

[1 pre-purge stage [2 Ignition stage [3 operating in CH mode

- Set the room thermostat back to a lower temperature (no

more heat demand), the display shows;

[4 operating in DHW mode (boost to DHW plate on

minimum load)

[5 waiting-time; 3 to 10 minutes (only when flow tem-

perature has already been reached and heating demand is still existing)

[1 pre-purge stage [7 pump run on after CH or DHW is satisfied [0 stand-by mode

Remeha Avanta Plus

ﬁ g. 43 Read out settings

LT.AL.W7H.000.046



• If the boiler is set to the economy setting (see par. 2.9.8), it will not supply a boost to DHW after CH is satisfied. The display then shows [1 pre-purge stage, [6 pump run on after CH, [0 stand-by mode.

• If a two channel time clock is fitted and connected to a combi boiler and the time control for DHW is in the “OFF” position, the DHW production will be disabled unless the link between connectors 2 and 3 on the X2 terminal is fitted (normally factory fitted).

2.9.6 Read out settings

The following settings can be read out in the ‘user menu’:

- t1 = flow temperature [°C]

- t2 = return temperature [°C]

- t3 = boiler temperature [°C]

- t4 = outside temperature [°C]

- fl = ionisation current [uA]

- ñf = fan speed [rpm]

• Press the [+] key, until t1 appears and, for example, 68

(68 °C), the current flow temperature;

• Press the [+] key again until t2 appears and, for example, 45 (45 °C), the current return temperature;

• Press the [+] key again until t3 appears and, for example, 50 (50 °C), the current boiler temperature;

• Press the [+] key again until t4 appears and, for example, 18 (18 °C), the current outside temperature;

• Press [+] key again until fl appears and e.g. ^0 (6 uA), the present ionisation current;

• Press [+] key again until ñf appears and e.g. 30 (3000 rpm), the present fan speed;

• Press [+] key again and the read-out cycle will start again with t1, etc.;

• Press [reset] key to return to the display with the current operating status.

2.9.7 Adjust the boiler according to the system

The operating parameters of the Remeha Avanta Plus have been factory set to suit most systems. However it is possible to adjust some of the parameters to enable the Remeha Avanta Plus

to operate more efficiently to match specific system designs and site conditions. These parameters are split into two specific sections

1. User level – Parameters p 1 to p 6; can be changed by

the user to suit CH and DHW comfort conditions

2. Service level – p17 to dF ; must only be changed by a

competent qualified Engineer.



How to change the parameters at user level can be read in the “User manual” provided and therefore will not be detailed in this Installation and Service manual.

2.9.8 Changing the parameters at service level (with access code)

To avoid non authorised adjustments, some parameter settings can only be changed once the special access code 12 has been entered. This code may only be used by qualified installers. The following settings can be changed at user and service level:

Codes in display Description

p 1 p 2

p 3

p 4

p 5

Can also be changed by users

p 6

flow 20 - 85°C 75°C

set

DHW 40 - 65°C 55°C

set

Boiler regulation

Eco-mode or DHW preheat setting

Anticipated current

Display off automatically

Maximum fan speed CH

p 17

(natural gas)

Maximum fan speed CH (propane) Maximum fan speed DHW

p 18

(natural gas) Maximum fan speed DHW (propane) Minimum fan speed (CH and DHW)

p 19

(natural gas) Minimum fan speed (CH and DHW) (propane)

p 20

p 21

p 22

p 23

Starting fan speed Do not change 25 25 28 30

Pump setting CH

Pump running time after CH 1 - 99 minutes 2

Connection with Heat Recovery Unit (HRU)

To be changed by installer only

p 24

p 25

p 26

State remote alarm (X7 terminal)

Legionella protection

DHW cut-in temperature 2 - 15°C 5

Setting range and notes where applicable

0 = CH

and DHW

off

1 = CHon and DHWon 2 = CHon and DHW 3 = CH

and DHW

off

24c 28c 35c 39c

Factory settings

0 = DHW preheat on 1 = DHW preheat off* 2 = regulated by controller 0 = no anticipated current for thermostat

on/off 1 = anticipated current for thermostat on/off 0 = display stays off 1 = display stays on 2 = displaylight switches off automatically

after 3 minutes

10 – 70 x 100 rpm

Do not change *** 44

Adjustments for propane firing

) 37 1 ) 41 1 ) 50 1 )

) 37 1 ) 41 1 ) 48 1 )

) 55 1 ) 63 1 ) 67 1 )

) 52 1 ) 60 1 ) 65 1 )

Do not change *** 13

Adjustments for propane firing

0 = low 1 = high

0 = no connection with HRU 1 = connection with HRU 0 = off

(connectors 1 and 2 closed) 1 = alarm signal

(connectors 1 and 2 closed) 2 = run indication (connectors 1 and 3

closed) 3 = ext. gas valve (connectors 1 and 3

closed) 4 = external pump relay (connectors 1 and

3 closed) 0 = off 1 = on 2 = automatic (after putting boiler into

operation, it will run for DHW operation

65°C once a week)

Remeha Avanta Plus

p 27

p 28

p 29

p 30

P 31

p d f

(p d U

To be changed by installer only

is shown

later)

Heat curve set point flow temperature Heat curve set point outside temperature (min)

Heat curve set point outside temperature (max)

Boiler type

DHW control stop

Restore factory settings

0 - 60 °C 20

0 - 30 °C 20

-40 - 0 °C - 15**

0 = combi 1 = system

0 - 20 °C 15

On identification plate d f setting X is shown. Change parameter into X will restore the factory settings, see par. 2.9.10

On identification plate d U setting Y is shown. Change parameter into Y will restore the factory settings, see par. 2.9.10

table 09 Settings at service level

) Do not exceed this value * the system boiler in combination with an external calorifier will not warm up the calorifier in the Eco-mode. ** minus character is not shown in display *** only change for propane firing

Codes in display Description

p 1 p 2

p 3

flow 20 - 85°C 75°C

set

DHW 40 - 65°C 55°C

set

Boiler regulation

Setting range and notes where applicable

0 = CH

and DHW

off

1 = CHon and DHWon 2 = CH 3 = CH

and DHW

off

Factory settings

18s 24s 30s

0 = comfort setting

p 4

Eco or comfort setting

1 = eco mode* 2 = regulated by controller 0 = no anticipated current

Can also be changed by users

p 5

Anticipated current

for thermostat on/off 1 = anticipated current for thermostat on/off 0 = display stays off

p 6

Display off automatically

1 = display stays on 2 = displaylight switches off auto-

matically after 3 minutes

p 17

p 18

Maximum fan speed CH (natural gas) Maximum fan speed CH (propane) Maximum fan speed DHW (natural gas)

Maximum fan speed DHW (propane)

10 – 70 x 100 rpm 10 – 70 x 100 rpm

Do not change *** 35

Adjustments for propane firing

) 37 1 ) 52 1 )

) 3 5 1 ) 50 1 )

) 43 1 ) 52 1 )

) 41 1 ) 50 1 )

Minimum fan speed

To be changed by installer only

p 19

(CH and DHW) (natural gas) Minimum fan speed (CH and DHW) (propane)

Do not change *** 13

Adjustments for propane firing

p 20

p 21

p 22

p 23

p 24

p 25

p 26

p 27

p 28

To be changed by installer only

p 29

p 30

P 31

Starting fan speed Do not change 25 25 28

Pump setting CH

Pump running time after CH 1 - 99 minutes 2 Connection with Heat

Recovery Unit (HRU)

State remote alarm (X7 terminal)

Legionella protection

DHW cut-in temperature 2 - 15°C 5 Heat curve set point

flow temperature Heat curve set point outside temperature (min) Heat curve set point outside temperature (max)

Boiler type

DHW control stop

0 = low 1 = high

0 = no connection with HRU 1 = connection with HRU

0 = off (connectors 1 and 2 closed) 1 = alarm signal (connectors 1 and 2 closed) 2 = run indication (connectors 1 and 3 closed)

3 = ext. gas valve (connectors 1 and 3 closed) 4 = external pump relay (connectors 1 and 3 closed) 0 = off 1 = on 2 = automatic (after putting boiler

1 into operation, it will run for DHW operation 65°C once a week)

0 - 60 °C 20

0 - 30 °C 20

-40 - 0 °C - 15**

0 = combi 1 = system

0 - 20 °C 15

On identification plate d f setting X is shown. Change parameter into

p d f

(p d U

is shown later)

Restore factory settings

X will restore the factory settings,

see par. 2.9.10

On identification plate d U setting Y is shown. Change parameter into Y will restore the factory settings,

see par. 2.9.10

table 10 Settings at service level

Remeha Avanta Plus

ﬁ g. 44 Change parameters in service level

LT.AL.W7H.000.047



Changing the factory settings could result in the boiler not working properly.

The parameters can be changed from the stand-by status as follows:

• Press the [enter]-key and briefly the [reset]- key until codes

c and 0 appear alternately in the display.

• Press the [+]-key until access code 12 is displayed.

• Press the [enter]-key until p1 appears (codes p [ and [ 1 are displayed alternately);

• This parameter can now be changed as follows;

• Press the [enter]-key; the set value for the maximum flow temperature now appears e.g.; 75 (75°C).

• Press the [+] or [-]-key to change this value, for example to 65 (65°C).

• Press [enter]-key to confirm the value; codes p [ and [ 1 are displayed alternately.

• Press the [+]-key to change the next parameter, etc.

• Press [reset]-key to return to the operating mode.



The boiler will automatically return to the normal operating mode if no keys are pressed for 10 minutes.

ﬁ g. 45 Change boiler output

LT.AL.W7H.000.048

2.9.9 Changing the maximum output (Hi) for CH

operation

The maximum output for CH operation can be changed with

parameter p 17 (maximum fan speed) and is set standard to a speed of 3500, 3700, 4100 or 5000 rpm for the four Combi-types and 3600, 3700 or 5200 rpm for the three System-types. See the speed-input ratio figures.

This parameter can be changed from the stand-by status as follows:

• Press the [enter]-key and briefly the [reset]- key until codes c and 0

appear alternately in the display.

• Press the [+]-key until access code 12 is displayed.

• Press the [enter]-key until p1 appears (codes p [ and [ 1 are displayed alternately);

• Press the [+]-key to go to parameter 17.

• Press the [enter]-key until p17 appears (codes p [ and 17 are displayed alternately);

•

Press the [+] or [-]-key to change this value for Avanta Plus 28c, for example to 46 (4600 rpm corresponds with 22 kW).

• Press [enter]-key to confirm the value.

• Press [reset]-key to return to the operating mode.

Avanta Plus 28c

35.0

30.0

25.0

20.0

15.0

Hi input [kW]

10.0

5.0

1000 2000 3000 50004000 6000

Speed-input ratio

Fan speed [rpm]

ﬁ g. 46 Fan speed / boiler input ratio Avanta Plus 28c

LT.AL.W7H.000.050

Avanta Plus 39c

Hi input [kW]

1000 60005000400030002000 7000

Speed-input ratio

Fan speed [rpm]

The speed-input ratio figures for Avanta Plus 18s, 24s and 24c are equal to 28c.

The speed-input ratio figure for Avanta Plus 30s, 35c are equal to 39c.

ﬁ g. 47 Fan speed / boiler input ratio Avanta Plus 39c

LT.AL.W7H.000.051

Remeha Avanta Plus

2.9.10 Restore factory settings

The factory settings can be restored in the service level as follows:

ﬁ g. 48 Restore factory settings

LT.AL.W7H.000.052

1. After parameter p31 has shown, press the [+]-key; d f and xx appear alternately;

2. Press -key; xx appears;

3. Read boiler identification plate for value of d f ; press [+] or [-] key to reach this value;

4. Press -key to confirm; d U and yy appear alter-

nately;

5. Read boiler identification plate for value of d U ; press [+] or [-] key to reach this value;

6. Press -key to confirm; boiler restarts with original factory

settings.

2.10 Putting the boiler out of operation

The boiler must be switched off and allowed to cool down before any maintenance or repairs are carried out. If the central heating system is not going to be used for a long time (during the holidays, for instance, or frost-free periods) it is advisable to put the boiler out of operation.

2.10.1 Boiler with frost protection, during longer periods

of non-use

• Set the room thermostat to a low temperature, e.g. 10°C;

• Switch setting p4 to 1 (hot water pre-heat) will switch off this function.

Now the boiler will only start working to protect itself against freezing. With external frost protection, the boiler can also prevent the central heating system from freezing.

2.10.2 Boiler without frost protection, during longer

periods of non-use

• Turn time clock off and allow system to cool down then isolate mains power supply at the fused spur unit.

• Isolate the gas supply at the boiler valve.



Drain the boiler and central heating system if you will not be using the home for a long period and there is a chance of night frost.

3 INSPECTION AND MAINTENANCE

The Remeha Avanta Plus is practically maintenance free but should be inspected annually.



If during the annual inspection the flue gas analysis indicates that the values are outside the figures given in table 11, maintenance work should be carried out as described in par.3.2. Also carry out maintenance if the ionisation read-out value is lower than 3 or higher than 9μA.

Only Remeha spare parts/materials should be used. All service and maintenance must be carried out by a qualified Engineer with the relevant training and certification (i.e. ACS

- IEE registrations etc).

3.1 Inspection

The annual inspection of the Remeha Avanta Plus can be limited to the following checks:

- check the water pressure, see par. 3.1.1;

- check the flue pipes and air supply pipes for leaks, see par.

3.1.2.;

- check and clean (if necessary) the condensate siphon, see par.0.;

- check the ignition electrode and ionisation, see par. 0;

- check the combustion and flame pattern, see par. 3.1.5;

- Fill in the Benchmark Service Record on the inside back pages of this document.

ﬁ g. 49 Annual inspection

112952.LT.GB.W7H.053

>1bar

ﬁ g. 50 Checking the water pressure

112952.LT.GB.W7H.054

Remeha Avanta Plus

3.1.1 Checking the water pressure

The water pressure should be checked against the commissioning entry located on the inside back of this document (min 1 bar).

• If necessary, re-fill system to design pressure and re-set red pointer to match fill pressure 2 bar.



Check system for leaks if the system needs re-filling more than 3 times per year.

2bar

ﬁ g. 51 Checking ﬂ ue pipes

112952.LT.GB.W7H.055

3.1.2 Checking the flue pipes and air supply pipes for

leaks

• Check that the flue and air-supply connections and pipes are sealed and the terminal exit is clear.

ﬁ g. 52 Checking siphon

T001775

3à4mm

3.1.3 Checking the condensate siphon

• Check the condensate siphon. Remove any dirt residues and refill with clean water to the mark.

3.1.4 Checking the ignition electrode

• Check the ionisation /ignition electrode for:

- deposits (remove any white deposits with abrasive cloth);

- the adjustment of the ignition electrode (between 3 and 4

mm);

- the quality of the gasket and condition of the porcelain (this should not be cracked);

• Check the ionisation current after 1 minute on the display

code fl, see par. 2.9.6.

If the read-out value is lower than 3 or higher than 9μA, check cable and connections are sound if OK replace the ignition electrode.

ﬁ g. 53 Checking the ignition electrode

112952.LT.GB.W7H.056

ﬁ g. 54 Checking the combustion

112952.LT.GB.W7H.057

>1 min



The ignition cap is fixed on the ignition electrode and therefore cannot be removed.

3.1.5 Checking the combustion

• Measure the O

/CO2 percentage and the flue gas tempera-

ture at the flue gas sample point.

Do this as follows:

- heat the water temperature in the boiler to approx. 70°C;

- unscrew the top of the flue gas point of measurement;

- measure the O

/CO2 percentage and compare this to the

check values in table 11.



Ensure that the analysing probe has a gas tight seal in the sampling point with the probe end in the centre of the flue duct.

Remeha Avanta Plus

Checking values O2/CO2 for natural gas H / L

Boiler-

type

18s approx. 3500 approx. 1300

24s approx. 4300 approx. 1300

30s approx. 5200 approx. 1300

24c approx. 4400 approx. 1300

28c approx. 5500 approx. 1300

35c approx. 6300 approx. 1300

39c approx. 6700 approx. 1300

Fan speed (rpm) O

Full load h3 Part load L3

% %

5.2

± 0.2

5.2

± 0.2

5.2

± 0.2

5.2

± 0.2

5.2

± 0.2

5.2

± 0.2

5.2

± 0.2

8.8

± 0.3

8.8

± 0.3

8.8

± 0.3

8.8

± 0.3

8.8

± 0.3

8.8

± 0.3

8.8

± 0.3

After servicing, complete the relevant Service Interval Record section of the Benchmark Checklist located on the inside back pages of this document.

table 11 Checking values O

Checking values O

Boiler-

type

Fan speed (rpm) O

Full load h3 Part load L3

18s approx. 3300 approx. 2000

24s approx. 4100 approx. 2000

30s approx. 5000 approx. 2000

24c approx. 4300 approx. 2000

28c approx. 5200 approx. 2000

35c approx. 5800 approx. 2000

39c approx. 6500 approx. 2000

table 12 Checking values O

/CO2 (front panel not ﬁ tted)

/CO2 for LPG (propane)

% %

5.1

± 0.2

5.1

± 0.2

5.1

± 0.2

5.1

± 0.2

5.1

± 0.2

5.1

± 0.2

5.1

± 0.2

/CO2 (front panel not ﬁ tted

10.5

± 0.3

10.5

± 0.3

10.5

± 0.3

10.5

± 0.3

10.5

± 0.3

10.5

± 0.3

10.5

± 0.3



The O2/CO2 - values in table 11 and table 12 are checking values. For setting values see table 05 and table 07.

ﬁ g. 55 Benchmark Checklist

T002020

If the flue gas analysis readings are within the values in table 11 or table 12 the boiler combustion is OK. However if the readings are outside the given values, then adjust the gas air ratio control to the given values, see table 05 and table 07 in par.2.9.3. If the adjustments cannot achieve the mentioned values, the boiler will require a full service please refer to the maintenance instructions in par. 3.2.

- check the flame via the inspection glass; in full load the flame should be stable with an even blue colour and in part load should be stable with an even orange colour.

Gas

230 V

3.2 Maintenance

To conduct maintenance:



Ensure that a service gasket set and new ignition/ionisation electrode is available before carrying out this procedure.



• Isolate power supply at the fused spur before carrying out any work on the boiler.

1. Open the boiler

• Isolate the 230 V supply at the switched spur and remove

the fuse

• Isolate the gas supply at the boiler gas valve

• Remove the front panel (release the two screws at the bottom of the front panel, pull the bottom of

the panel forward and lift off the two pins on the top of the

main casing).

ﬁ g. 56 Open the boiler

LT.AL.W7H.000.058

2. Maintenance of the ignition/ionisation electrode

• Disconnect the earth wire from the electrode mounting plate.

• Release the two screws on the electrode and remove the assembly.

• Inspect, clean re-gap or replace the electrode, see par 0.

ﬁ g. 57 Maintenance the electrode

LT.AL.W7H.000.059

Remeha Avanta Plus

3. Dismantling the front plate of the heat exchanger

ﬁ g. 58 Dismantling the front plate of the heat exchanger

LT.AL.W7H.000.060

• Release the ignition transformer mounting plate and remove it completely.

• Disconnect the electrical connection on the gas block.

• Release the union nut from the gas pipe on the outlet to the gas block.

• Release the four nuts on the heat exchanger front plate

• Carefully pull the front plate assembly c/w fan, gas block, venturi pipe and burner unit away from the heat exchanger by approx. 10 cm.

• Disconnect the electrical plug on the back of the fan, so it becomes accessible.

• Remove the front plate assembly completely.

4. Maintenance to the burner

ﬁ g. 59 Checking the burner

LT.AL.W7H.000.061

• Carefully clean the burner with pressured air (do not keep

the nozzle to close to the surface).

• Visual inspection of the burner for any damages or cracks

on the surface. If you see any damages, then replace the burner.

ﬁ g. 60 Maintenance to the heat exchanger

112952.LT.GB.W7H.062

5. Maintenance to the heat exchanger (CH)

• Check the seal between the front plate and the heat exchanger and the insulation section. Replace sealing.

• Handle the fragile front-plate insulation and the back-plate insulation of the heat exchanger with great care and do not let them get wet.

• Visual inspection of the heat exchanger for scale or dirt. If you see obvious deposits, than clean the heat exchanger carefully. Carefully remove any loose dirt with a vacuum cleaner.

• Then brush the coils of the heat exchanger (if required a cleaning brush is available as an accessory) and remove the loosened particles with a vacuum cleaner.

6. Cleaning plate heat exchanger (DHW) and non return

valve with filter

Scale deposits on the plate heat exchanger cannot be totally excluded, depending on such variables as tap water quality and operation mode. We recommend annual inspections under standard circumstances. Please note that following factors may influence the frequency of inspection:

• Water hardness

• Chemical composition of scale deposit

• Boiler operation hours

• DHW usage pattern

• DHW set temperature

Remeha Avanta Plus

If a cleaning operation becomes necessary, please proceed as follows:

• Turn off the mains cold water supply and drain off the residual DHW;

• Release two socket head screws and remove plate heat exchanger

• Clean plate heat exchanger with scale solvent (e.g. citric acid, pH 3); a special cleaning tool (optional accessory) can be used;

• Thoroughly cleaning afterwards with clean water;

• Remove non return valve with filter from on the right hand side of the hydro block and also clean with the scale solvent; afterwards thoroughly cleaning with clean water.

230 V

ﬁ g. 61 Cleaning plate heat exchanger and non return valve with

ﬁ lter.

LT. AL.W7H.000.231 + LT.AL.W7H..000.232

7. Re-Assembling the boiler and checking the combustion

• Re-assemble all the components in reverse order.



• Check that the packing between the front plate and the heat exchanger has been fitted correctly.

• Fill the system with water.

• Switch the boiler back on.

• Check the CO

• Check the ionisation current by reading the display, see par.0

• Check the connections on the gas block on gas-leaking.

-percentage, 2.9.3, point 4.

2/O2



Fill in the Benchmark Service Record on the inside back pages of this document, after conducting any maintenance.

230 V

ﬁ g. 62 Assembling the boiler

112952.LT.GB.W7H.063

Check

4 ERRORS

Remeha Avanta Plus

4.1 General

The Remeha Avanta Plus has an advanced control unit. The heart of this control unit is a microprocessor, the abc trol which both controls and protects the boiler. If an error is detected anywhere in the boiler, it will lock-out and an error code will appear in the display.

4.2 Error codes

The Remeha Avanta Plus displays the error codes as follows: é 2 (the display alternately shows an é and a number e.g. 2) The meaning of the various error codes can be found in the error table, see table 13.

How to deal with errors:

• Make a note of the displayed error code.



The error code is important for the correct and swift detection of the nature of the error and for possible support from our technical help line 0118 978 3434.

-con-

• Press the ‘reset’ key for 3 seconds. If the error code continues to appear, look for the cause in the error table below and resolve it.

Error code Description Possible cause Check / solution

Check the wiring and the connections of the sensors visually: are the plugs all correctly in position? With a multimeter: measure the resistance in the wiring and connection.

Check that the sensors are working; take the sensors out * and measure the resistance with a multimeter at room temperature (20 - 25°C); the sensor is working properly if the resistance is between 12 and 15 kΩ.

Check that the pump is working; turn the spindle with a screwdriver, if that works but the pump still does not respond, check the wiring; if that is in order the pump is faulty.

Check that the pump is working; turn the spindle with a screwdriver, if that works but the pump still does not respond, check the wiring; that is in order the pump is faulty.

Check that the power supply from the switch spur is properly earthed, if that is the case the control unit is faulty.

é0

é1

é2

é3

Flow or return sensor fault.

Flow temperature is higher than the set maximum temperature

Return temperature is higher than the flow temperature

Control unit or earth fault

Short circuit in the flow, return or boiler temperature sensor.

Defective or not (properly) connected flow, return or boiler temperature sensor.

Insufficient water. Check the minimum water pressure, read off the gauge.

No through flow.

Too much air in the system. Vent the system.

Deviation in the flow or return temperature sensor.

Insufficient water. Check the minimum water pressure, read off the gauge.

No through flow.

Too much air in the system. Vent the system.

Sensors not wired correctly Check the wiring between sensors and control unit.

Deviation in the flow or return temperature sensor.

Mains supply not correctly earthed. Control unit faulty.

Error code

é4

é5

é6

é7

é8

Description Possible cause Check / solution

Check:

• the connection between the ignition wire and the ignition trafo;

• the ignition wire and electrode for ‘dielectric breakdown’;

• the inter-electrode distance, this should be 3-4 mm; that the ignition electrode is properly earthed.

• the gas tap is open;

• the gas pre-pressure is sufficient;

• the gas pipe is de-aerated;

• the gas valve is energised during ignition and opens;

• the electrode is correctly fitted and clean;

• the CO

• there is no obstruction / fitting fault in the gas pipe;

adjustment at low and full load;

• there is no obstruction in the air supply or flue (e.g. a blocked siphon); there is no recirculation of flue gasses (either inside or outside the boiler).

Check:

• the flame, is the heart of the flame visible and the flame stable?

• the CO

• that the ignition electrode is correctly earthed;

adjustment at low and full load;

• visual check of the ignition/ionisation electrode: look for white oxide film (remove with sandpaper or a screwdriver); look at the shape (are the pins still the original shape and is the distance between the two ends of the pins between 3 and 4 mm).

adjustment on the gas block;

• CO

• ignition/ionisation pin;

• flue/air-supply connections;

• gas flow at full load;

•

if there is no recirculation of flue gasses (either inside or outside the boiler).

Faulty control unit, replace control unit.

Check the minimum water pressure, read off the gauge and check for leaks.

Check that the pump is working; turn the spindle with a screwdriver, if that works but the pump still does not respond, check the wiring; that is in order the pump is faulty.

Check wiring from and to control unit.

• fan function;

• fan wiring and connection.

• fan function;

• fan wiring and connection;

• excess chimney draught.

More than 5 start attempts without any flame formation.

No ionisation or ionisation failure more than 5 times during one heat demand.

Unwanted flame formation

No water in the boiler or the pump is not working

Fan fault

No ignition spark.

A spark but no flame. Check that:

There is a flame but no, or insufficient ionisation (lower than 3 or higher than 9 μA)

wrongly adjusted Check:

Insufficient water.

No through flow.

Too much air in the system. Vent the system.

Wrong pump wiring. Fan is not working Check:

Fan does not stop Check:

Insufficient water. Check the minimum water pressure, read off the gauge and check for leaks.

é10

é11

é13

No through flow during venting cycle

Air box temperature to high

Heat-exchanger fuse protection has responded; replace the heat exchanger after finding and solving the cause.

No through flow Check that the pump is working; turn the spindle with a screwdriver, if that

works but the pump still does not respond, check the wiring; that is in order the pump is faulty.

Too much air in the system.

Vent the system.

Wrong pump wiring. Check wiring from and to control unit.

Check:

Air leakage from heat exchanger to air box

• The sealing of the viewing glass;

• Whether front plate of heat exchanger is properly tightened

• Front plate sealing;

• Whether ignition electrode is properly fitted

Heat exchanger faulty. Check wiring between heat exchanger fuse.

Insufficient water. Check the minimum water pressure, read off the gauge and check for leaks.

No through flow. Check that the pump is working; turn the spindle with a screwdriver, if that

works but the pump still does not respond, check the wiring; that is in order the pump is faulty.

Remeha Avanta Plus

Error

Description Possible cause Check / solution

code

é43

é44

é45

25000

20000

15000

10000

resistance in

5000

Parameter limits Automation settings

Parameter check Automation settings

Default parameters Automation settings Replace boiler control unit.

Temperature/resistance diagram

10 20 30 40 50 60 70 80 90 100

temperature in °C

ﬁ g. 63 Sensor resistance graph

Sensor resistance

Replace d f / d U settings, see Par. 2.9.10 If this error code still returns after resetting; please contact Broag.

table 13 Error codes

* When sensors have been taken out, be sure to replace them

max. 40 mm underneath heat exchanger.

If you read out a not listed error, please report to Broag.

4.3 Control stop or lock-out

The code d8 , d5 or d9 can appear in the display.

•

Code d8 is a control stop and will appear if the measured flow temperature (t1) is higher than the flow temperature set (Tset flow). The boiler will start working again automatically once the flow temperature falls below the flow temperature set.

• Code d5 is a control stop from 3 till 10 minutes and appears if the set flow temperature (t1) has already been reached and the heating demand still exists.

• Code d9 is a shut down and appears if the maximum temperature rise is exceeded or if the dT between the supply and return temperature ≥ 45°C or a rate of rise in the flow temperature > 1°C/sec. And also at a boiler-start with no through flow or insufficient water. The boiler will try to restart after 10 minutes.



Every 10 minutes the boiler will try to restart until the cause has been removed.

• Code d9 is a shut down and can appear in the following situation:

- the lock-out down input (between connectors 5 and 6 on terminal block X9) has been activated (= opened).



The shut down will disappear once the cause has been removed!

4.4 Error memory

The Remeha Avanta Plus control unit has an error memory, in which the last 16 errors are stored. In addition to the error code (é and a number xx). The following data is also stored:

• the number of times the error occurred (n and a number xx)

• the operating status of the boiler (5t and a number xx)

• the flow temperature (t1 and the value xx) return temperature (t2 and the value xx) at the time the error occurred.

To get access to the error memory, access code must be entered.

4.4.1 Error read outs

• Press the [enter]-key and keep it pressed;

• Press the [reset]-key until codes c and 0 appear alternately in the display;

• Enter the special access code 88 with the [+] or [-]- key;

• Press the [enter]-key; the display shows ér and the number of the last error alternately, for

example 02.

• Press the [+] or [-]-key to go forwards or backwards in the list of errors.

• Press the [enter]-key to take a closer look ot the error. The display shows the error code as follows;

- first error code é with error number e.g. 12

- then status code 5t with status number e.g. 3 (burning for central heating)

- then number of time that the error has occurred ñ and a number e.g. 3

- then the flow temperature when the error occurred t1 and temperature e.g. 75

- final the return temperature when the error occurred t2 and temperature e.g. 60

This cycle continues to repeat itself.

• Press the [reset]-key to stop the cycle; the following appears in the display;

ér and the last viewed errors e.g the numbers 1 and 8.

• Press the [+] or [-]-key to look at the following error data.

ﬁ g. 64 Error read outs

LT.AL.W7H.000.064

4.4.2 Deleting errors

The last message in the list, Er followed by cl will appear in the display;

• Press the [enter]-key again, and the following will appear in the display: 0

• Press the [+]-key to set the parameter to 1.

• Press the [enter]-key, to delete the error memory:

• Press the [escape]-key twice to exit the error memory.



When tracing an error, the cause can often be found more quickly if the operating status at the time the error occurred can be retrieved from the error memory.

5 SERVICE PARTS

Your reference Date

Customer

Name Address City Post Code Contact person Telephone

Remeha Avanta Plus

5.1 General

If, following the annual inspection or maintenance any part of the boiler is found to need replacing, use Remeha spare parts only or spare parts and materials recommended by Remeha.

If any component is to be replaced and it is covered by the terms and condition as described in the warranty leaflet, return the faulty component to Broag-Remeha with the details as show in table 14

Part. no. Description Boiler

serial nr.*

Model Installation date Problem

description

table 14 Return form example

* These details can be found on the boiler type plate; the type plate is fixed to the bottom of the boiler.

Reference

2010

2030

1005

2029

1001

2032

2016

1004

2024

2027

2017

2023

2003

2028

2015

2004

2002

2005

2014

2012

2040

2001

2006 2020

2013

2019

4005

4007

2021

1003

4001

2039

2009

4011

4007

4004

2018

2041

2022

4006

2034

2011

4007

4013

2033

4012

2038

2025

2032

2036 2042

2037

4009

3006

4014

2026

1002

1008

5010

5013

5004

5011

4002

3007 3012

3005

3009 3004

5012

1009

5021

5023

2035

3010

1007

3001

5029

5014 5015

1006

5024

1012

3015

3009

1009

5022

1010

5018

5006

2019

1002

5025

4010

3013

5020

3014

5023

4003

5019

5022

3004

3008 3011

3002

4008

5033

5030

5020

5017

5008

4004

5021

5002

5009

5003 5011

5012

5031

3016

5020

3014

3017

5030

3003

5026

5020

5018

5032

5019

5001

5032

5031

5028

5017

5027

5026

ﬁ g. 65 Exploded view Remeha Avanta Plus (combi)

112952.EV.GB.W7H.000

Remeha Avanta Plus

Break down parts kit Part No Description Position

S62743 Electrode ignition/ionisation 2004 S62728 Vent auto air bleed device 2010 S62746 Pump for 18s, 24s, 30s, 24c and 28c 2011 S62747 Pump for 35c and 39c 2011 S58733 Sensor temperature (2 pcs.) 2013 S62733 Gauge pressure c/w capilliary 2026 S58684 Fan assembly 24VDC 3001 S58685 Gas combination block 3005 S62734 Control board 4001 S62739 Display print board 4002 S62750 Transformer ignition 4003 S43561 Fuse glass 2 amp slow (10 pcs.) 4011 S59132 Actuator three way valve 5002 S59133 Sensor DHW flow 5006 S62763 Safety pressure relief valve with pipe 5015 S62781 Flowswitch + hall sensor 5033

table 15 Break down parts kit

6 EC DECLARATION

EC – DECLARATION OF CONFORMITY

Manufacturer : Remeha B.V. Address : Kanaal Zuid 110 Town, Country : Postbus 32, NL-7300 AA Apeldoorn

- hereby declares that the appliance(s) : Remeha Avanta Plus

comply / complies with the specifications of the following EEC directives:

EEG Directive: 90/396/EEG applied standards:

(pr)EN 297

73/23/EEG (pr)EN 50165(1997), 60335-1(1994)

92/42/EEG

89/336/EEG EN 50165 EN 61000-3-2(2000), 61000-3-3(1995)

97/23/EG (Art.3, sub 3)

Apeldoorn, July 2005

W.F. Tijhuis Approval Manager

(1994), 483(1999), 625(1995), 677(1998)

(1997), 55014-1(2000), 55014-2(1997)

7 REGULATIONS

Remeha Avanta Plus

7.1 EC regulations

The boiler meets the requirements of the EC regulations at the following directives:

- 90/396EEC Gas appliances directive

- 92/42/EEC Efficiency directive

- 73/23/EEC Electrical low voltage directive

- 89/336/EEC EMC directive

- 97/23/EEC Pressure equipment directive (art. 3, sub. 3)

Classification type for evacuation of the combustion products; according EN 483

7.2 Remeha factory test

Before it leaves the factory, each Remeha Avanta Plus boiler is optimally adjusted and tested for:

- electrical safety;

- CO2- adjustment;

- hot water function

- water tightness;

- gas tightness;

- automation parameters.

7.3 Additional guidelines

In addition to the regulations and guidelines as mentioned in par.7.1 the following guidelines in this documentation should also be observed.

It applies for all regulations and guidelines, mentioned in this Installation and Service manual, that any additions or new regulations and guidelines at the time of installation will also apply.

8 TECHNICAL SPECIFICATIONS AND WORKING PRINCIPLE

8.1 Technical data

Appliance type Remeha Avanta Plus

24c

combi

28c

combi

35c

combi

39c

combi

General

Gas council numbers Boiler control

- 41-288-01 47-673-02 47-673-03 47-673-04 modulating or on/off

Nominal output Pn (80/60°C) (CH) kW 20.0 21.6 29.4 33.3 Nominal output Pn (50/30°C) (CH) kW 21.6 23.0 31.3 35.5 Nominal input Qn Hi kW 5.8 - 21 5.8 - 22 6.1 - 30 6.3 - 34 Nominal input Qnw Hi kW 24.0 28.0 35.0 39.0 Assembly dry weight kg 30.5 30.5 32 34.5 Noise level at distance of 1m from the boiler (at full load) dB(A) < 44

Gas and flue details

Classification due to discharging flue gases - C13, C33, C53, C83 Gas type permitted - II

(natural gas and propane) *

2H 3P

Gas inlet pressure natural gas mbar 20 - 30

Gas consumption natural gas maximum m

/h 2.5 3.0 3.5 3.9

Gas flue rate kg/h 40 47 57 62

Gas inlet pressure propane mbar 37 - 50

Gas consumption propane maximum m

Class 2)-5

emissions @ 0% excess 02 mg/kW 37 37 38 39

/h 1.0 1.2 1.3 1.6

)

Residual fan duty (full load) Pa 50 100 100 140

CH side

Water capacity heat exchanger and piping l 1.8 1.8 2.0 2.2 Expansion vessel size l 8 Minimum operating water pressure bar 1 Maximum operating water pressure PMS bar 2.5 Water temperature maximum °C 110 Operating temperature maximum °C 95

Residual head dT = 20°C

Domestic hot water side Tap capacity D (dT = 35°C)

)

mbar

 250  250  250  200

l/min 10.0 11.4 14.2 15.9

Minimum tap flow l/min 1.2 1.2 1.2 1.2 Operating pressure P

min. - max. bar 0.5 - 8 0.5 - 8 0.5 - 8

Water resistance (nom. output) incl. flow restrictor bar 1.3 1.3 - Water resistance (nom. output) excl. flow restrictor bar 0.1 0.1 0.1 0.1

Electrical

Main supply V/Hz 230 / 50 Power consumption W maximum W 115 115 150 180 in stand-by status W < 3 Degree of protection IP X4D

table 16 Summary of technical data

) Measured according EN 483, EN 15420 (EN 297 A3)

(Class 5 complies with a limited concentration of NO < 70 mg/kWh)

) This data applies for natural gas. * For propane a kit with restrictor is required. For type 39c a kit with restrictor and burner is needed.

Remeha Avanta Plus

Appliance type Remeha Avanta Plus

18s

system

24s

system

30s

system

General

Gas council numbers Boiler control

- 41-288-11 41-288-05 41-288-12 modulating or on/off

Nominal output Pn (80/60°C) (CH) kW 18.0 21.6 29.4 Nominal output Pn (50/30°C) (CH) kW 19.1 23.0 31.3 Nominal input Qn Hi kW 5.8 - 18.3 5.8 - 22 6.1 - 30 Nominal input Qnw Hi kW - - Assembly dry weight kg 29.0 29.0 32.0 Noise level at distance of 1m from the boiler (at full load) dB(A) < 44

Gas and flue details

Classification due to discharging flue gases - C13, C33, C53, C83 Gas type permitted - II

(natural gas and propane) *

2H 3P

Gas inlet pressure natural gas mbar 20 - 30

Gas consumption natural gas maximum m

/h 1.9 2.3 3.2

Gas flue rate kg/h 31 37 51

Gas inlet pressure propane mbar 37 - 50

Gas consumption propane maximum m

Class 2)-5

emissions @ 0% excess 02 mg/kW 37 37 37

/h 0.7 0.85 1.2

)

Residual fan duty (full load) Pa 50 50 100

CH side

Water capacity heat exchanger and piping l 1.8 1.8 2.0 Expansion vessel size l 8 Minimum operating water pressure bar 1 Maximum operating water pressure PMS bar 2.5 Water temperature maximum °C 110 Operating temperature maximum °C 95

Residual head dT = 20°C

Domestic hot water side Tap capacity D (dT = 35°C)

)

mbar

 250  250  250

l/min - - -

Minimum tap flow l/min - - Operating pressure P

min. - max. bar

Water resistance (nom. output) incl. flow restrictor bar - - Water resistance (nom. output) excl. flow restrictor bar - - -

Electrical

Main supply V/Hz 230 / 50 Power consumption W maximum W 115 115 115 in stand-by status W < 3 Degree of protection IP X4D

table 17 Summary of technical data

) Measured according EN 483, EN 15420 (EN 297 A3)

(Class 5 complies with a limited concentration of NO

) This data applies for natural gas.

* For propane a kit with restrictor is required.

< 70 mg/kWh)

8.2 The boiler components

1. Automatic air vent

2. Flue / Air inlet connection

3. Flue gas measuring point

4. Heat exchanger

5. Front plate heat exchanger

6. Air inlet tube

7. Gas combination block

8. Two channel time clock (optional)

9. Control panel

10. Pressure gauge

11. Circulation pump

12. Expansion vessel

13. Ignition/ionization electrode

14. Stand off frame (optional)

ﬁ g. 66 Components of the Remeha Avanta Plus combi

112952.LT.GB.W7H.202

8.3 Working principle

The Remeha Avanta Plus casing serves as a sealed air box, with air drawn in by the fan. On the outlet side of the fan is a venturi, into which a measured quantity of gas is injected based on the volume of air available. The fan speed control is dependent on the settings of the external control, the advanced boiler controller ‘abc tures (measured by the temperature sensors).

This method of gas/air ratio control ensures that the gas quantity is precisely adjusted to the air quantity. Thus creating optimum combustion over the whole heat input range. The gas and air is mixed in the venturi and then passes into the specially designed pre-mix burner. After combustion, the hot flue gas is directed through a specially designed, high efficiency helicoil stainless steel heat exchanger with a large surface area, and transfers it’s heat to the system water circulating around the coils. In the condensing part of the exchanger the water vapour in the flue gas condenses within it and the heat released during this process (the so-called latent or condensing heat) is also transferred to the system water. The condensate water so formed is discharged from the heat exchanger via a siphon.



In normal operation, the boiler’s flue gas discharge will produce a visible white condensing “plume” and therefore care should be taken when choosing a location for the terminal.

’ and the prevailing tempera-

Combi boiler operation

The Remeha Avanta Plus 24c, 28c, 35c and 39c are combination boilers with an integral plate heat exchanger providing instant domestic hot water. On opening a hot water tap, detected by a flow sensor, which is located on the cold water inlet side of the heat exchanger detects the demand. This sensor then activates the motorised three-way valve to divert primary flow to the plate heat exchanger which raises the temperature of the cold water supply by a minimum of 35°C to provide domestic hot water. Once the demand for hot water stops the motorised valve automatically returns to the DHW

Remeha Avanta Plus

position. This three-way valve is electrically controlled by the

’ control and only consumes power when it is changing to

‘abc a different position. The plate heat exchanger is protected from debris by two filters one in the cold water supply and one in the primary flow to the diverting valve – Note: the primary flow filter self cleans when the flow reverts back to heating mode.

System boiler operation

The Remeha Avanta Plus 18s, 24s and 30s have the same design and layout as the combi range without the DHW components (three way valve and plate heat exchanger).

8.3.1 Regulating

The Remeha Avanta Plus is a fully modulating boiler and can be regulated using one or more of the following methods;

1. Open Therm – 2 wire interface compatible with the Remeha Celcia 15 room compensator and the Remeha Celcia 20 outside weather compensator or with any other proprietor’s OpenTherm

2. Open Therm thermostat in combination with an external time clock.

3. On/Off room thermostat – volt free (on the X9 terminal block).

4. On/Off room thermostat – 230 V (on the X2 terminal block).

5. 230 V Switching time clock - compatible with the Remeha two channel time clock or with any other proprietor’s time clock. For further details see par. 2.8.

controls.

8.3.2 Advanced boiler control (‘abc®’-control)

An intelligent advanced boiler control (‘abc

’) continuously

monitors the boiler conditions and ensures a very reliable supply of heat. This control system is adept at dealing with negative influences from the system such as flow reduction, airflow problems and alike. In the event of such influences, the boiler will not go to “lock-out” failure mode, but will in the first instance modulate back, and if necessary, depending on the nature of the circumstances, will temporarily switch off (shutdown or control stop), and then after a short while simply try again.



Provided that the situation is not actually hazardous, the Remeha Avanta The ‘abc

Plus will always try to supply heat.

’- control prevents unnecessary additional call outs.

8.3.3 Regulating the water temperature

The Remeha Avanta Plus is fitted with an electronic temperature regulator with flow and return temperature sensors. The flow temperature can be set to between 20 and 85°C, see

2.9.8 (factory setting 75°C) The boiler modulates it’s output up

and down to match the flow set point from internal or external control. When the boiler is at it’s at minimum output and the flow temperature still continues to rise, once the flow set point is exceeded by 5°C the boiler will shut down on a controlled stop (code 8).

8.3.4 Low flow / water protection

The Remeha Avanta Plus has a low-water protection based on temperature readings. By modulating down as soon as there is a risk of an insufficient water flow, the boiler will keep working for as long as possible. An insufficient water flow, however caused, - indicated by a flow/return dt ] 45°C or a rate of rise in the flow temperature > 1°C/sec – will be sensed by

®’

the ‘abc

control which will shut the boiler down in a blocking

mode with the display showing (code 9) for 10 minutes and before re-starting. If there is no water in the boiler or if the pump is not running, it will go to lock out (code é7) and require manual re-set.

8.3.5 High Limit temperature protection

If the flow temperature exceeds 110°C the high limit temperature protection device switches off the boiler in a lock out mode with the display showing (code é1) This mode will require a manual re-set. When the fault is corrected, the boiler can be restarted by pressing the reset-key on the control panel and holding for 3 seconds.

9 EFFICIENCY DATA AND GAS EFFICIENCY LABELS

9.1 Annual efficiency

110.5 % in relation to Hi at a load of 30% and a return tem-

perature of 30°C.

9.2 Water-side efficiency

98 % in relation to Hi at full load and an average water temperature of 70°C (80/60°C).

94.3 % in relation to Hi at full load and an average water tem-

perature of 40°C (50/30°C).

Remeha Avanta Plus

120577-060309

Broag Ltd. Remeha House Molly Millars Lane RG41 2QP WOKINGHAM, Berks.

Tel: +44 118 9783434

© Copyright All technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions furnished by us remain our property and may not be multiplied without our prior consent in writing.

Fax: +44 118 9786977 Internet: uk.remeha.com

www.avantarange.com

E-mail: boilers@broag-remeha.com

remeha Avanta Plus Combi 24C, Avanta Plus Combi 28C, Avanta Plus Combi 35C, Avanta Plus Combi 39C, Avanta Plus System 18S User guide

Specifications and Main Features

Frequently Asked Questions

User Manual