REMEHA 24c Supplément

Installation &

Service Manual

Remeha Avanta Range

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

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Remeha Avanta Plus

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 ﬂow 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 ﬂow’ 14

2.3.10 Connecting condensate drain 15

2.3.11 Connecting under ﬂoor 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 ﬂue 17

2.5.3 Connecting the ﬂue 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

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 pro-

mote the Scheme.

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

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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 ﬂue 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 ﬂow / 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

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Remeha Avanta Plus

INTRODUCTION

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)

ﬁg. 01 Remeha Avanta Plus

112952.LT.GB.W7H.001

These technical instructions contain useful and important infor-

mation 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.

The installation, commissioning, inspection and servicing of

the boiler must be carried out by a competent registered engi-

neer who holds valid ACS certification and in accordance with

current gas safety (installation and use) regulations, the build-

ing regulations and all other relevant codes of practice.

All electrical work must be carried out by a competent engi-

neer 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 con-

tact 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 sub-

ject 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.

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1 SAFETY

1.1 General safety

The following pictograms are used in this Installation and Serv-

ice 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

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Remeha Avanta Plus

The Remeha Avanta Plus (combi and system) is a WRAS

(Water regulations) approved product.

ﬁg. 02 WRAS logo

LT.AL.W7H.000.074

Remeha Avanta Plus (combi and system) - PIN:

0063BQ3009

Gas Council numbers:

Remeha Avanta Plus 24c: 41-288-01

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.

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Instructie service

AvantaPlus

400

min.600 300

min.250

min.25

670

ﬁg. 03 Scope of delivery

112952.LT.GB.W7H.011

ﬁg. 04 Clearance requirements

112952.LT.GB.W7H.003

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 Broag-

Remeha);

- 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.

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 sup-

ply.

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 pipe-

work tails to allow connections facing downwards.

Optional stand off frame and pipework kits are available

to enable the pipework to run upwards behind the boiler if

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.

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

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”

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Remeha Avanta Plus

73.3(2x)

180.75

200

312.5

71.5

328.5

379

584106

670

26.5

systeem

146.7

141.7

30.5

148

74.5

400

160

300

132.5

ﬁg. 05 Dimensions and connection points of the Remeha Avanta

Plus system

112952.LT.GB.W7H.005

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

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73.3(2x)

79.8(2x)

114

180.75

200

247.5

312.5

71.5

328.5

379

74.5

584106

400

160

300

132.5

670

26.5

146.7

141.7

30.5

148

combi

ﬁg. 06 Dimensions and connection points of the Remeha Avanta

Plus combi

112952.LT.GB.W7H.002

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

flue outlet position and any pluming consequences.

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Remeha Avanta Plus

ø10 mm

ﬁg. 07Mounting the Avanta Plus

112952.LT.GB.W7H.012

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).



• 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®’ control also monitors the tem-

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.

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