remeha Avanta Plus Heat Only 12V, Avanta Plus Heat Only 18V, Avanta Plus Heat Only 24V User guide

Installation &
Service Manual

Remeha Avanta Range

12v I 18v I 24v

Remeha Avanta

Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are pro-

vided with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the man-

ufacturer’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 accord-

ance 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 Installation / maintenance clearance requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2.2 Dimensions and connection points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.3 Mounting the Remeha Avanta . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Water-side connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.1 Water flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.2 System Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.3 Pressure loss of the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.4 Open-Vented System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.5 Sealed systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.6 Additional guidelines for the domestic and CH water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.7 Water treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3.8 Safety valve discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.3.9 Draining Provision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.3.10 Connecting the ‘CH return’ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.3.11 Connecting ‘CH flow’ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.3.12 Connecting condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4 Gas-side connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4.1 Additional guidelines for gas connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4.2 Adjusting boiler to other gas-type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4.3 Connecting the gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5 Flue terminal and air supply connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5.1 Flue terminal positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5.2 Room sealed flue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.5.3 Connecting the flue terminal and air supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.6 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.6.1 The control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.7 Connecting external controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.7.1 Connecting an on/off control – room temperature (volt free switching) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.7.2 Connecting a time control using an external 230 V clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.7.3 Connecting a 230 V time clock in combination with a modulating room control . . . . . . . . . . . . . . . . . . . . . . . . 20

2.7.4 Connecting a modulating control – room or outside compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.7.5 Connecting an outside temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.7.6 Connecting the DHW sensor/thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.7.7 Connecting a three-way valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.7.8 Connecting a frost thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.7.9 Connecting an external interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2

2.7.10 Connecting remote alarm and boiler run indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.7.11 Connecting a PC/PDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.8 Connecting an external pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.9 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.10 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2.10.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2.10.2 Additional guidelines for commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2.10.3 Putting the boiler into operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2.10.4 Normal start-up procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2.10.5 Error during the start-up procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2.10.6 Read out settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.10.7 Adjust the boiler according to the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.10.8 Changing the parameters at service level (with access code) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.10.9 Changing the maximum output (Hi) for CH operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

2.10.10 Restore factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.11 Putting the boiler out of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.11.1 Boiler with frost protection, during longer periods of non-use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.11.2 Boiler without frost protection, during longer periods of non-use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3 INSPECTION AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.1.1 Checking the flue pipes and air supply pipes for leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3.1.2 Checking the condensate siphon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

3.1.3 Checking the ignition electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

3.1.4 Checking the combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4 ERRORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.2 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.3 Control stop or lock-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.4 Error code memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.4.1 Error read outs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.4.2 Deleting errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

5 SERVICE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6 EC DECLARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

7 REGULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7.1 EC regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7.2 Remeha factory test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7.3 Additional guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

8 TECHNICAL SPECIFICATIONS and working principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.2 The boiler components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

8.3 Working principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

8.3.1 Regulating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

8.3.2 Advanced boiler control (‘abc®’-control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

8.3.3 Regulating the water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

8.3.4 Low flow / water protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.3.5 High Limit temperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

. . . . . . . . . . . . . . . . . . 58

9 EFFICIENCY DATA AND GAS EFFICIENCY LABELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

9.1 Annual efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

9.2 Water-side efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

3

INTRODUCTION

Remeha Avanta

The Remeha Avanta is a series of wall mounted high-efficien­cy fully condensing central heating boilers, for open vented
systems

These technical instructions contain useful and important infor­mation for the correct installation, operation and maintenance
of the Remeha Avanta boiler.



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 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.

fig. 01 Remeha Avanta

59970LTGBW7H046



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.

4

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. [phone].



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 Gas Safety (Installation & Use) Regulations 1998,
the Remeha Avanta, 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.

5

Remeha Avanta

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

Remeha Avanta 12v - PIN: 0063BQ3009
Remeha Avanta 18v - PIN: 0063BQ3009
Remeha Avanta 24v - PIN: 0063BQ3009
Gas Council numbers:
Remeha Avanta 12v: 41-288-09
Remeha Avanta 18v: 41-288-06
Remeha Avanta 24v: 41-288-10

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

Health and safety information

• The Avanta system is below the maximum lift weight for one
person, however please ensure all necessary care is taken
when lifting the boiler on to the wall mounting bracket.

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

6

2 INSTALLATION

fig. 02 Scope of delivery

59970.LT.GB.W7H.006

2.1 Scope of delivery

The standard delivery of the Remeha Avanta boiler includes:

- Boiler + mounting bracket

- Installation and Service manual, Quick reference card and
Mounting Template

- 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)

- Wiring diagrams

- Gas cock with gasket + 90° gas pipe ( 22 mm)

- nylon plugs and screws for fixing mounting plate

- olives and nuts

- spacers

- cable glands;

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, pipe work 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 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 Installation / maintenance clearance requirements

The gas connection is located on the bottom of the boiler
whilst the water connections, air inlet and flue gas outlet are
located on the top of the boiler. The boiler is supplied as
standard with gas pipe work tails.
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. All servicing / inspection /
repairs are made from the front of the boiler.
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 clear­ances to 22 cm at the top, and 25 cm at the bottom provided
the boiler front panel can be removed and the isolating valves
are easily accessible without the use of tools”

7

min.1000

400

290

min.
250

600

min.
250

Remeha Avanta



Clearances shown are for ease of installation – once fitted it is
possible to enclose the boiler in a cupboard with 25mm clear­ances around the casing provided a door is included to allow
the front cover to be removed completely for maintenance and
allowance is made to access the gas valve and flow / return
connections.

fig. 03 Clearance requirements

132,5

290

60022679

49

147

59970LTGBW7H047

160

317

400

50

2.2.2 Dimensions and connection points.

 Return connection Ø 22 mm

40

 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)



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

• In determining the boiler position, consider carefully the
flue outlet position and any pluming consequences.

85

206

88

94

40

fig. 04 Dimensions and connection points of the Remeha

Avanta

59970.LT.GB.W7H.001

8

ø8 mm

2.2.3 Mounting the Remeha Avanta

• Remove template from the box.

• Using the template determine and mark the position of the
mounting bracket and flue outlet.

• Drill the (Ø 8 mm) holes.

• Fit the (Ø 8 mm) plugs.

• Core drill the (Ø 125 mm) hole for the flue outlet

• Fit (Ø 6 mm) screws into the plugs.

• Remove boiler from the box and mount on bracket.

2x



• 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, or frost
protection controls MUST be fitted.

• 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.



• Make sure the boiler and any open connections are

protected from building etc. dust during the installation.

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

the boiler.

• Provision must be made for the condensate discharge.

fig. 05 Mounting the Avanta

59970.LT.GB.W7H.002

2.3 Water-side connections

2.3.1 Water flow

The central heating system should not require a bypass,
unless all radiators are fitted with TRV’s or when the system
controls could allow the boiler and pump to operate when
there is no flow. Where a bypass has to be fitted, the bypass
must be placed at least 1.5 metres away from the boiler.
The ‘abc

®

’ control also monitors the temperature 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 reset.

2.3.2 System Pump

The system pump must be wired directly to the boiler terminal
strip and be capable of providing the nominal flow at design
conditions against the combined resistance of the boiler and
system.

The minimum flow rate is 1.05 m

3

/h (0.29 l/s) at full load and

15°C differential across flow and return. To operate at dT =
11°C the flow rate must be 1.37 m

3

/h (0.38 l/s)

Higher resistance systems may require a higher duty pump.

The maximum power consumption of the pump may not
exceed 150 W /1.5 amps.
The connection of the pump is described in par. 2.8

9

Remeha Avanta

700

600

500

400

300

Pressure Loss [mbar]

200

100

0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2

Pressure Loss Graph

Waterflow [m3/h]

Recommended T 11oC

Tmax.20

fig. 06 Pressure loss graph

Min. 450 mm

Feed and
exansion
cistern

o

C

59970.LT.GB.W7H.003

2.3.3 Pressure loss of the boiler

2.3.4 Open-Vented System

The feed and expansion tank must be situated at a minimum
height of 1 metre and a maximum height of 30 metres above
the boiler to provide the correct operating head pressure.
The cold feed must be at least 15 mm and the open vent must
be at least 22 mm. The pipes must rise continuously from the
system. The heating vent must be at least 450 mm above the
water level in the feed and expansion cistern.

The pump should be fitted on the flow pipe from the boiler
and have isolating valves each side.

2.3.5 Sealed systems

If the Avanta is installed on a sealed system, an appropriately
sized expansion vessel and a safety valve MUST be installed
close to the inlet side of the pump. A mains filling loop MUST
be installed close to the outlet side of the system pump, along
with automatic air vents positioned in the system pipe work to
ensure adequate system venting during filling and operation.

An adequate pressure gauge should be fitted in a position
where it can be seen during filling of the system.

All in accordance with the current issue of the relevant British
Standards.

2.3.6 Additional guidelines for the domestic and CH water

• Flush the pipes and radiators thoroughly before connecting
the boiler to the central heating system in accordance with
BS 7593 (1992).

Heating vent
Min. 22 mm

Static head
Min. 1 m

Max. 150 mm

fig. 07 Open-Vented system

Cold feed
Min.15mm

Flow

Return

59970.LT.GB.W7H.004



• 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, see par. 2.3.7.

10

2.3.7 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.



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:

‘F1®’ manufactured by: or: Sentinal ‘X100®’ manufactured by:
Fernox, Cookson Electronics Sentinel Performance Solutions
Forsyth Road The Heath Business & Technical Park
Sheerwater Runcorn
Woking Cheshire,
Surrey GU21 5RZ WA7 4QX
Tel No: 01483 793200 Tel No: 0800 389 4670
Fax No: 01483 793201 Fax No: 0800 389 4677
Email: [e-mail] Email: [e-mail]
Web site: www.fernox.com Web site: www.sentinel-solutions.net

11

Remeha Avanta

2.3.8 Safety valve discharge

A pressure relief safety valve is not needed for Open-Vented
systems.

2.3.9 Draining Provision

Drain points must be provided at all the low points of the
system to ensure that the entire system can be completely
drained. The boiler is provided with a drain in the return pipe.

2.3.10 Connecting the ‘CH return’

• Remove the dust cap from the ‘CH return’ connection 

at the top of the boiler.

• Fit the return pipe to 22 mm Ø compression fitting.

fig. 08 Connecting CH return

59970.LT.GB.W7H.005

2.3.11 Connecting ‘CH flow’

• Remove the dust cap from the ‘CH flow’ connection 

at the top of the boiler.

• Fit the flow pipe to the 22 mm Ø compression fitting.

fig. 09 Connecting CH flow

59970.LT.GB.W7H.007

12

fig. 10 Connecting condensate drain

59970.LT.GB.W7H.034

2.3.12 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 or a “tundish” immediately below the
boiler).

• 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 maxi­mum horizontal length of 5 m.



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

waste etc) the connection must 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.

2.4 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.

2.4.2 Adjusting boiler to other gas-type

The Avanta boiler is suitable for both natural gas and propane
firing. For propane a kit with restrictor is required.
The boiler is 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 restrictor (not included with boiler)
Adjust the fan speed (see par. 2.10.8) and
Adjust the gas/air ratio (see par. 2.10.3).

13

fig. 11 Connecting gas supply

59970.LT.GB.W7H.035

Remeha Avanta

2.4.3 Connecting the gas supply

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

• Remove the dust cap from the gas connection  at the

bottom of the boiler.

• Connect the gas supply to the 22 mm Ø connection (copper
tail supplied).



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

• Make sure that there is sufficient gas pressure available

(at full load > 17 mbar).

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

boiler.

• 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 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
figure and table 01. 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.

are shown in the

14

A

600 mm

S

G

F

P

H

2000 mm

S

B

C

A

G

fig. 12 Flue terminal positions

600 mm

D,E

J

No flue must penetrate
area within dotted lines
round roof light

M

L

J

K,N

LT.AL.W7H.000.020

Dimensions Terminal location Minimum distance (in mm)

to terminal (room sealed)

A Directly below an opening, air brick,

opening window, etc.

300

B Above an opening, air brick, opening window, etc. 300
C Horizontally to an opening, air brick,

opening window, etc.

300

D Below a gutter or sanitary pipe work 75
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 1500

L Vertically from a terminal on same wall 1500
M Horizontally from a terminal on same wall 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

table 01 Minimum distances to terminal

15

L

80/125 or 60/100

Remeha Avanta

2.5.2 Room sealed flue

See table 02 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.

M&G material

Diameter in mm Ø 60/100 80/125

Maximum length ‘L’ allowed [m] 834

Eq. Length of 90° elbow

L

VRS roof
mounted
room sealed
terminal

2

59970.LT.GB.W7H.008 +

59970.LT.GB.W7H.009

ø125 mm

min. 275 mm

Eq. Length of 45° elbow

1

1.4

LT W6H 000 031

0.65

LT W6H 000 032

table 02 Maximum pipe lengths for fl ue duct and air supply in

room sealed application



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

• Check the depth of the wall and cut the terminal to suit
– taking note of the cutting instructions supplied with it

• Core drill a 125mm Ø hole in the wall, fit the rubber closure
plate at the exit end and slide the terminal through the wall
until the closure plate is clear of the outer edge of the wall
– pull back the terminal till the closure plate is flush then fit
inner wall closure to secure.

1

2

fig. 13 Connecting flue terminal and air supply



• All connections must be airtight and waterproof.

• Horizontal extension sections should slope towards the

boiler (at least 3 cm per metre).

59970LTGBW7H010

16

230 V

fig. 14 Electrical components with live 230 V

59970LTGBW7H011

2.6 Electrical connection

• Connect the boiler to the fused (3 amp) switch spur unit
adjacent to the 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 gas combination block;

• most parts of the control unit;

• ignition transformer;

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

• 230 V supply cable connection.

2.6.1 The control unit

The Remeha Avanta 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.

fig. 15 The control unit

LTALW7H000023

The maximum rated input of the boiler is 150 W. The boiler is
fully pre-wired internally, all external connections can be made
using the terminal strips 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 03.

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 03 Control unit characteristics



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

17

Remeha Avanta

The output of the Remeha Avanta can be controlled in the fol­lowing ways:
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 X9 terminal
strip (low voltage only).
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 X2 terminal strip
(230 VAC only).
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
X9 terminal strip (low voltage 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).



• 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,
release plastic clip below display and remove the front casing.

• Remove one of the supplied grommets in the base of the
boiler, fit a cable gland and feed the cables through.

• 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.

fig. 16 Connecting external controls

59970LTGBW7H012

18

Exist
links

Exist
links

Terminal
Block X6

L
N

Terminal
Block X7

Terminal
Block X5

Terminal
Block X9

Terminal
Block X2

230v - 3 Amp
Power Supply

E

1

Common Alarm
(Closes on alarm)

2

3

Neutral

1

Open valve to DHW (230v)

2

Open valve to HTG (230v)

3

Outside sensor (red band) for direct boiler weather compensation

1

or when used in conjuction with a compatable Open Therm
control eg: Chronotherm or Celcia 20

2

3

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

4

5

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

6

Modulating - using Open Therm control

7

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

8

eg: Celcia 10 or low volt room thermostat

54N

Power supply to external time clock -230v

L

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

3

Remove existing link 4-3 to use this function

2

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

1

Remove existing link 4-1 to use this function

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

X2

X5

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

X6

X7

X9

fig. 17 Boiler External Connection terminal details

Terminal
Block X9

1

2

Exist
links

3

4

5

6

7

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

8

X9

fig. 18 Wiring diagram on/off control

LT.AL.W7H.000.025

2.7.1 Connecting an on/off control – room temperature
(volt free switching)

The Remeha Avanta can be connected to a 2-wire on/off ther­mostat, such as the Remeha Celcia 10.
Mount the thermostat in a reference room (usually the living
room).

• Remove existing link and connect the 2-wire 24 V room

thermostat to connectors 7 and 8 of the X9 terminal strip.



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

2.10.8.

LT.AL.W7H.000.026

19

Remeha Avanta

2.7.2 Connecting a time control using an external 230 V
clock

X2

Terminal
Block X2

5

Power supply to external time clock -230v

4NL

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

3
Exist
links

fig. 19 Wiring diagram for an external 230 V time clock

Remove existing link 4-3 to use this function

2

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

1

Remove existing link 4-1 to use this function

LTALW7H000027



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

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

.

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

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

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

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



For this option to function correctly, a link or room control
must be fitted between connectors 7 and 8 of X9 terminal strip
(remove existing link before use).
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 230 V 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 strip and a Celcia 15
connected to connectors 7 and 8 of X9 terminal strip (remove
existing link), the Remeha Avanta will provide room compen­sated heating and time control over CH and DHW.



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

20

Exist
links

Terminal
Block X9

1

2

3

4

5

6

7

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

8

X9

2.7.4 Connecting a modulating control – room or
outside compensation

The Remeha Avanta has an OpenTherm® interface. This ena­bles our modulating range of OpenTherm

®

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).

• Remove existing link and connect the two-wire interface

cables to connectors 7 and 8 of the X9 terminal strip.

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

sensor to provide weather compensation with room adjust­ment. Connect the outside sensor to connectors 1 and 2 on
the X9 terminal strip.

fig. 20 Wiring diagram modulating regulator

Terminal
Block X9

1

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

2

3

4

Exist
links

5

6

7

8

X9

fig. 21 Wiring diagram outside temperature sensor

LTALW7H000028

LTALW7H000029

If the DHW water temperature on the OpenTherm

®

control can
be adjusted, then the Remeha Avanta will supply water at the
temperature determined at the OpenTherm

®

with the maximum
being set in the boiler.
OpenTherm

®

is an industry standard modulating control avail-

able from several control manufacturers.



The Remeha Avanta can therefore be controlled directly by
any other controls with this OpenTherm

®

logo

2.7.5 Connecting an outside temperature sensor

An outside temperature sensor can be connected to connec­tors 1 and 2 of the X9 terminal strip.
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)

75

60

Factory setting

40

20

01020-15

fig. 22 Heat curve Remeha Avanta



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.

LTALW7H000030

21

Remeha Avanta

Terminal
Block X9

1

2

3

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

4

Exist
links

5

6

7

8

X9

fig. 23 Wiring diagram DHW calorifier sensor or thermostat

LTALW7H000031

X5

2.7.6 Connecting the DHW sensor/thermostat

• If an external DHW calorifier is being used with the Avanta
system boiler a DHW control sensor or volt-free thermo­stat can be connected to connectors 3 and 4 of the X9
terminal strip. The control will automatically detect wheth­er a sensor or a thermostat has been connected.

2.7.7 Connecting a three-way valve

If required a 230 V DIVERTING three-way valve can be con­nected to terminal X5 of the control unit. When used in con­junction with an “Open Therm” compensator the DHW-produc­tion operates with priority.
Connector X5-1 for N (neutral), connector X5-2 for ”open valve
to DHW” (port A of three-way valve) and connector X5-3 for “
open valve to CH (port B of three-way valve)

Terminal
Block X5

Neutral

1

Open valve to DHW (230v)

2

Open valve to HTG (230v)

3

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

fig. 24 Wiring diagram three-way valve

Terminal
Block X9

1

2

Exist
links

3

4

5

6

7

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

8

X9

fig. 25 Wiring diagram for frost thermostat

59970LTGBW7H041

LTALW7H000032



If port A is connected to heating and port B to hot water X5-3
should be used to enable DHW.

The cable must be fed through the boiler’s casing by means
of the supplied cable gland

and run trough the cable clamp on

the right-hand inside of the boiler.

2.7.8 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.



If a 230 V switching time clock is connected to terminal strip
X2, the frost thermostat wired as indicated (on connectors 7
and 8 of the X9 terminal strip) 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 strip (frost stat
contacts to close on temperature fall).

22

Terminal
Block X9

1

2

Exist
links

3

4

5

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

6

7

8

X9

fig. 26 Wiring diagram for an external interlock

Terminal
Block X7

1

Common Alarm
(Closes on alarm)

2

3

X7

Boiler Run or
external pump relay
(Closes on run)

LTALW7H000033



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

- Connect the frost thermostat in parallel to the room thermostat

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



• 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 contro

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

2.7.9 Connecting an external interlock

The Remeha Avanta 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 strip 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.

2.7.10 Connecting remote alarm and boiler run

indication

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.

fig. 27 Connecting remote alarm

LTALW7H000034

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

on terminal X7, but only via a relay.

23

Remeha Avanta

2.7.11 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.

fig. 28 X10 socket connector

Terminal
Block X4

1

2

3

4

- Neutral

- Live

System pump

E

X4

X10

LTALW7H000035



Not all PDA will run the Recom software - check with Broag
before buying a unit.

2.8 Connecting an external pump

Connect the system pump to terminal X4 (X4 -1 and X4 -2)
of the control unit. The pump’s earth connection must be con­nected to the control unit’s earth connection with an AMP-con­nector (supplied with boiler). The cable must be fed through
the boiler’s casing by means of the supplied cable gland

and

run trough the cable clamp on the right-hand inside of the
boiler.

fig. 29 Connecting external pump

59970LTGBW7H043

24

2.9 Wiring diagram

X9

X10

X13

X15

X8

X7

X6

X5

X4

X3

X1

X0

X2

X1

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

BKBRBL

WH

GY

GN/YW

1 2 3

X6X0

L N

1 2

X7

1 2 3 1 10

NC.

COMM.

X8

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

NO.

BR

WH

GN

YW

Blocking up entry

DHW sensor/thermostat

S

Compensator / Open Therm

T

BL

BR

GN/YW

4 1 3 6 8

RD

WHBLWH

Power supply
230V, 50Hz

N

L

X13

BK

BK

X15X5

123

15

GCVIgnition

WIRE COLOURS

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

1542

X81X21X22

FAN

BOILER COMPONENTS

As Flow sensor
CP Circulation pump

GCV Gas combination valve
HLT High limit thermostat
Os Outdoor sensor
Rs Return sensor

- - - - Will not be supplied or wired.

Os

12 12 12

X124 X123 X121

T

RsAs

HLT

1 10

fig. 30 Wiring diagram

25

59970LTGBW7H013

Remeha Avanta

2.10 Commissioning

2.10.1 Control Panel

1

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

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

2345

fig. 31 Control Panel

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

LTALW7H000036

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.

If no key is pressed for longer than three minutes with the
“boiler in stand-by mode”, only one dot is lit. With the “boiler
operating”, two dots are displayed (Factory default).

• 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.

2.10.2 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 Avanta boiler has been live test fired on the production

line and set up for Natural Gas with an inlet gas pressure
of 17- 20 mbar whilst operating and should therefore not
require any further adjustments.

fi g. 32 Benchmark Checklist



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

2.10.3 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.

T002019

26

1. Isolating the power supply and opening the front cover

1

fig. 33 Isolating power

230 V

2

• 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 towards
you from the centre, making sure that the plastic catch is
released from the central display.

1

59970LTGBW7H036

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.

1

2

3

4

• Open the valves on all the radiators connected to the central
heating system;

• Fill the system with water, making sure that the feed and
expansion tank is full;

• Vent the system;

• Check the condensate siphon. This should be filled with
clean water if necessary.



• Avoid water getting into the boiler.

• Check the system pump (spin the shaft to check that the
impellor can move freely);

• Check that all boiler connections are watertight;

Check

fig. 34 Open the valves

59970LTGBW7H014

27

fig. 35 Measurement point c on the gas block

C

Check

59970LTGBW7H037

Remeha Avanta

• 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.

• The minimum gas inlet pressure is 17 mbar for natural gas

• The minimum gas inlet pressure is 37 mbar for propane.

• 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.

fig. 36 Check electrical connections and thermostat

59970LTGBW7H015

28

230 V

3. Switching the boiler on and setting the controls

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

• Set the controls to heat demand.

• When 230v power is first applied to the boiler or after the
230v supply has been isolated for maintenance the boiler
will not start until it has fully completed its venting cycle
– this will take about 3 minutes during which time the display
will show f[ xx alternating with p[ xx (where
xx displays the software version number). This is not a
fault, please wait until the cycle is finished. Provided no
error codes appear during this time, the boiler will then start
to run if called for by the controls.

• The boiler now starts to run. The operational status is shown
in the display. 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.

fig. 37 Power on and controls on heat demand

59970LTGBW7H016

R

A

A

fig. 38 Check the gas/air ratio control – set to full load – gas/

air ratio adjustment A on gas block

59970LTGBW7H017

4. Setting the gas/air ratio at full load

The Avanta boilers are suitable for both natural gas and
propane firing (restrictor required for propane not supplied).
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 restrictor (instructions supplied);

- adjust the fan speed (for procedure see par.2.10.8, for values

see table 05 and table 07) and;

- adjust the gas/air ratio (for values see table 05 and table 07).

Setting values O2/CO2 for natural gas

Boiler

type

12v approx. 2400

18v approx. 3500

24v approx. 4500

table 04 Setting values full load CO

Fan speed (rpm) O

Full load h3 *)

± 0.1

± 0.1

± 0.1

and O2 (front panel not

2

2

% %

5.2
± 0.1

5.2
± 0.1

5.2
± 0.1

CO

8.8

8.8

8.8

2

fi tted)

Setting values O2/CO2 for LPG (propane)

Boiler

type

Fan speed (rpm) O

Full load h3 *)

12v Approx. 2400

18v Approx. 3300

24v Approx. 4300

% %

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

CO

2

2

10.3

± 0.1

10.3

± 0.1

10.3

± 0.1

table 05 Setting values full load CO

fi tted)

*) On forced full load, the 2

nd

29

and O2 (front panel not

2

digit indicates the operating code

Remeha Avanta

• 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

2

table 04 or 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

2

2

R

B

B

fig. 39 Check the gas/air ratio control – set to part load

– gas/air ratio adjustment B on gas block

59970LTGBW7H018

5. Setting the gas/air ratio at part load

Setting values O2/CO2 for natural gas

Boiler

type

Fan speed (rpm) O

Part load l3 *)

12v Approx. 1300

18v Approx. 1300

24v Approx. 1300

table 06 Setting values part load CO

fi tted)

Boiler

type

Setting values O

Fan speed (rpm) O

Part load l3 *)

/CO2 for LPG (propane)

2

12v Approx. 2000

18v Approx. 2000

24v Approx. 2000

table 07 Setting values part load CO

fi tted)

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

CO

2

% %

5,2

± 0,1

5,2

± 0,1

5,2

± 0,1

and O2 (front panel not

2

8.8

± 0,1

8.8

± 0,1

8.8

± 0,1

CO

2

% %

5.1

± 0.1

5.1

± 0.1

5.1

± 0.1

and O2 (front panel not

2

10.3

± 0.1

10.3

± 0.1

10.3

± 0.1

2

2

30

• 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

2

table 06.

• 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.



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

/CO

2

2



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

1

6. Preparing the boiler for use

2

3

fig. 40 Preparing 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.



R

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

3

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

time clock)

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

– Natural or LPG

• Fill in Commissioning Checklist, located on the inside back

of this document.

59970LTGBW7H019

The boiler is now ready for operation.



The Remeha Avanta 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

31

Remeha Avanta

7. Instructing the user

• It is the responsibility of the installer as part of the com­missioning 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 Boiler Benchmark Check­list at the back of this manual.

fig. 41 Instructing the user

59970LTGBW7H020

2.10.4 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
numbers will be displayed alternately;

- Next, the following will appear in the display;
[0 ; stand-by mode

2.10.5 Error during the start-up procedure

• If the display is blank (should show red dots 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.

32



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

• 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;
[5 ; waiting-time; 3 to 10 minutes (only when flow tem­perature has already been reached and heating demand is
still existing)

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

R

2.10.6 Read out settings

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

- t1 = flow temperature [°C];

- t2 = return temperature [°C];

- t3 = calorifier 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 [+] key again until fl appears and e.g. ^0 (6uA),
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.

fig. 42 Read out settings

LT.AL.W7H.000.046

33

Remeha Avanta

2.10.7 Adjust the boiler according to the system

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

Broag approved Engineer after consultation with the system
designer.



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

2.10.8 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 Setting range and notes where applicable

T

p 1
p 2

p 3

flow 20 - 85°C 75°C

set

T

DHW 40 - 65°C 55°C

set

Boiler regulation

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

and DHW

off

and DHW

on

and DHW

off

off

off

on

0 = comfort setting

p 4

Eco or comfort setting

1 = eco mode*

2 = regulated by controller
Anticipated current for
thermostat on/off

users

p 5

Can also be changed by

0 = no anticipated current

1 = anticipated current

0 = display stays off

p 6

Display off automatically

1 = display stays on

2 = display light switches off automatically after 3 min-

utes

p 17

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

10 – 70 x 100 rpm

10 – 70 x 100 rpm
(propane)

Maximum fan speed DHW

p 18

To be changed by installer only

(natural gas)

Maximum fan speed DHW
(propane)

10 – 70 x 100 rpm 24

10 – 70 x 100 rpm 24

Factory settings

12v 18v 24v

2

2

0

2

1

24

35145

1

33143

24

1

35145

1

33143

1

1

1

1

34

Minimum fan speed

p 19

(natural gas)
Minimum fan speed
(propane)
Starting fan speed

p 20

(natural gas)
Starting fan speed (pro­pane)

p 21

p 22

p 23

p 24

p 25

p 26

p 27

To be changed by installer only

p 28

p 29

p 30
P 31

Pump setting CH Do not change

Pump running time after
CH
Connection with Heat
Recovery Unit (HRU)

State remote alarm
(X7 terminal)

Legionella protection

DHW cut-in temperature

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

Heat curve set point
outside temperature (max)

Boiler type Do not change 3

Set point augmentation
calorifier

p d f
(p d U
is shown

Restore factory settings

later)

Do not change 13

10 - 40

Do not change

Do not change

20

25

25

1

0

1 - 99 minutes 2

0 = no connection with HRU
1 = connection with HRU

0

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

0
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

0

run for DHW operation 65°C once a week)
2 - 15°C 5**

0 - 60 °C 20

0 - 30 °C 20

-40 - 0 °C - 15***

0 - 20 °C 15**

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

X

par. 2.10.10

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

Y

par. 2.10.10

table 08 Settings at service level

1

Do not exceed this value
* The boiler in combination with an external calorifier will not
warm up the calorifier in the Eco-mode.
** Only in combination with a calorifier with a DHW sensor
*** “Minus” character is not shown in display



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

35

Remeha Avanta

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

R

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.

fig. 43 Change parameters in service level

LT.AL.W7H.000.047

36

R

2.10.9 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 2400, 3500 or 4600 rpm for the three System­types. 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 18v,

for example to 35 (3500 rpm corresponds with 18kW).

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

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

fig. 44 Change boiler output

30.0

25.0

20.0

15.0

10.0

Hi input [kW]

5.0

0

1000 1500 2000 2500 3000 3500 4000 4500

Speed-input ratio

LT.AL.W7H.000.048

Fan speed [rpm]

fig. 45 Fan speed / boiler input ratio Avanta 12V and 18V

45

40

35

30

25

20

15

Hi input [kW]

10

5

0

1000 60005000400030002000 7000

Speed-input ratio

Fan speed [rpm]

fig. 46 Fan speed / boiler input ratio Avanta 24V

T001103

T001104

37

Remeha Avanta

R

fig. 47 Restore factory settings

LT.AL.W7H.000.052

2.10.10 Restore factory settings

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

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 fac-

tory settings.

2.11 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.

2.11.1 Boiler with frost protection, during longer periods

of non-use

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

• Switch setting p4 to 1 (Eco mode), this will switch off
the heat retention 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.

2.11.2 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.

38

3 INSPECTION AND MAINTENANCE

The Remeha Avanta 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 09, 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, or when the flame core is not
correct.

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 can be limited to
the following checks:

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

3.1.1.;

- check and clean (if necessary) the condensate siphon, see
par.3.1.2.;

- check the ignition electrode and ionisation, see par. 3.1.3;

- check the combustion and flame pattern, see par. 3.1.4;

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

fig. 48 Annual inspection

59970LTGBW7H022

3.1.1 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.

fig. 49 Checking flue pipes

59970LTGBW7H023

39

Remeha Avanta

3.1.2 Checking the condensate siphon

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

fig. 50 Checking the condensate siphon

>1 min

3to4mm

59970LTGBW7H0234

3.1.3 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. 2.10.6.

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.



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

fig. 51 Checking the ignition electrode

59970LTGBW7H026

40

fig. 52 Checking the combustion

59970LTGBW7H025

3.1.4 Checking the combustion

• Measure the O

/CO2 percentage and the flue gas tempera-

2

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

2

check values in table 09.



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.

Checking values O

Boiler-

type

Fan speed (rpm) O

Full load h3 Part load L3

12v ca. 2400 ca. 1300

18v ca. 3500 ca. 1300

24v ca. 4500 ca. 1300

/CO2 for natural gas

2

% %

5,2

± 0.2

5,2

± 0.2

5,2

± 0.2

CO

2

2

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 09 Checking values O

Checking values O

Boiler-

type

Fan speed (rpm) O

Full load h3 Part load L3

12v ca. 2400 ca. 2000

18v ca. 3300 ca. 2000

24v ca. 4300 ca. 2000

table 10 Checking values O

/CO2 (front panel not fi tted)

2

/CO2 for LPG (propane)

2

2

% %

5.1

± 0.2

5.1

± 0.2

5.1

± 0.2

/CO2 (front panel not fi tted)

2

CO

10.3

± 0.3

10.3

± 0.3

10.3

± 0.3

2



The O2/CO2 - values in table 09 and table 10 are checking
values. For setting values see table 04 - table 07

If the flue gas analysis readings are within the values in table
09 the boiler combustion is correct. However, if the readings
are outside the given values, then adjust the gas air ratio con­trol to the given values, see table 04 - table 07 in par. 2.10.3.
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.

fi g. 53 Benchmark Checklist

T002020

41

Remeha Avanta

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

230 V

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 bot-

tom of the front panel, pull the bottom of the panel towards
you from the centre, making sure that the plastic catch is
released from the central display.

2

1

fig. 54 Open the boiler

59970LTGBW7H038

42

2x

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

3.1.3.

• Do not over tighten the screws when replacing.

fig. 55 Maintenance the electrode

4x

4

5

2

6

3

59970LTGBW7H027

1

3. Dismantling the front plate of the heat exchanger

• Isolate gas supply.

• 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 inlet to the
gas block.

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

• 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.

• Remove the front plate assembly completely.

fig. 56 Dismantling the front plate of the heat exchanger

59970LTGBW7H028

43

Remeha Avanta

4. Maintenance to the burner

• 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, than replace the
burner.

fig. 57 Checking the burner

59970LTGBW7H029

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.

fig. 58 Maintenance to the heat exchanger

59970LTGBW7H030

44

6. Re-Assembling the boiler and checking the combustion

• Re-assemble all the components in reverse order.

4x

3

2

4

5

6

1



• Remember to connect the fan plug again before it is
completely home on the front of the heat exchanger.

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

• Switch the boiler back on.

• Check the CO

• Check the ionisation current by reading the display, see
par.3.1.3

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



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

-percentage, 2.10.3, point 4.

2/O2

230 V

fig. 59 Assembling the boiler

Check

59970LTGBW7H031

45

4 ERRORS

Remeha Avanta

4.1 General

The Remeha Avanta has an advanced control unit. The heart
of this control unit is a microprocessor, the abc
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 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 11.

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.

®

-control which

Error
code

é0

é1

• Press the ‘reset’ key for 3 seconds. If the error code con-

tinues to appear, look for the cause in the error table below
and resolve it.

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 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

Flow or return
sensor fault.

Flow tempera­ture is higher
than the set
maximum tem­perature

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 water level and check for leaks.

No through flow.

Too much air in the system. Vent the system.

Deviation in the flow or
return temperature sensor.

46

é2

é3

é4

é5

é6

Return tempera­ture is higher
than the flow
temperature

Control unit or
earth fault

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

Insufficient water. Check the water level and check for leaks.

Check that the pump is working; turn the spindle with a screwdriver,

No through flow.

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.
Sensors not wired correctly Check the wiring between sensors and control unit.
Pump operating in wrong
direction
Flow and return connections
crossed

Check wiring from and to control unit.

flow and return connections

Check that the sensors are working; take the sensors out* and
Deviation in the flow or
return temperature sensor.

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
Mains supply not correctly
earthed.
Control unit faulty.

Check that the power supply from the switch spur is properly

earthed, if that is the case the control unit is faulty.

Check:

No ignition spark.

• 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 weather
the ignition electrode is properly earthed.

A spark but no flame. Check that:

• 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

adjustment at low and full load;

2

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

• 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).

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

Check:

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

• the CO

adjustment at low and full load;

2

• that the ignition electrode is correctly earthed;

• 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).

CO

wrongly adjusted Check:

2

• CO

adjustment on the gas block;

2

• 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).

Ignition Unit Faulty ignition unit, replace ignition unit.
Control unit Faulty control unit, replace control unit.

47

é7

é8

é10

é11

é13

é43

é44

é45

Insufficient water. Check the water level and check for leaks.

No water in the
boiler or the
pump is not
working

Fan fault

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.

Parameter limits Automation settings

Parameter check Automation settings

Default param­eters

No through flow.

Too much air in the system. Vent the system.
Pump operating in wrong
direction.
Pump not running Check wiring, connections and pump
Fan is not working Check:

Fan does not stop Check:

Insufficient water. Check the water level and check for leaks.
Too much air in the system. Vent the system.
No through flow • Check that the pump is working; turn the spindle with a screw-

Air leakage from heat
exchanger to air box

Heat exchanger faulty. Check wiring between heat exchanger fuse.

Insufficient water. Check the water level and check for leaks.

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

Automation settings Replace boiler control unit.

Remeha Avanta

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.

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

• Open the radiator valves.
Check:

• The sealing of the viewing glass;

• Whether front plate of heat exchanger is properly tightened

• Front plate sealing;

• Whether ignition electrode is properly fitted

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

Replace d f / d U settings, see par. 2.10.10
If this error code still returns after resetting; please contact Broag.

Replace d f / d U settings, see par. 2.10.10
If this error code still returns after resetting; please contact Broag.

table 11 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.

48

Temperature/resistance diagram

25000

20000

Ω

Ω

15000

10000

resistance in

5000

0

10 20 30 40 50 60 70 80 90 100

temperature in °C

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 (T

flow). The boiler will start working again

set

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 lock-out and appears if the maximum tem­perature rise is exceeded or if the dT between the supply
and return temperature ≥ 22°C or a rate of rise in the flow
temperature > 2,7°C/sec. and also at a boiler-start with noth­rough flow or insufficient water. The boiler will try to restart
after 10 minutes.

fig. 60 Sensor resistance graph

Sensor resistance



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

• Code d9 is a lock-out and can appear in the following
situation:

- the shut down input (between terminals 5 and 6 on X9)
has been activated (= opened).



The lock-out will disappear once the cause has been removed!

4.4 Error code memory

The Remeha Avanta control unit has an error code 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.

49

Remeha Avanta

R

4.4.1 Error read outs

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

• Press the [reset]-key until codes c and 0 appear alter-

nately 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 e.g the numbers 1 and 8.

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

fig. 61 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]



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.

-key twice to exit the error memory.

50

5 SERVICE PARTS

Your reference Date

Customer

Name
Address
City
Post Code
Contact person
Telephone

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 12

Part. no. Description Boiler

serial nr.*

Model Installation date Problem

description

table 12 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

51

2026

2002

2006

2010

1001

2001

2008

2007

2009

2030

2022

Remeha Avanta

1006

1003

1004

4008

4007

2015

2014

2013

2016

2004

2003

2012

2018

2017

2021

2018

2020

2019

2011

3006

2005

3001

4002

4012

1007

4011

1005

3008

3011

4003

3012

3005

3004

3004

1002

4010

3002

3012

2023

1007

3009

4009

3010

2024

1005

2023

3003

1002

2025

4005

4001

4006

4004

2029

2028

2027

3015

59970EVGBW7H010b

fig. 62 Exploded view Remeha Avanta

52

59970EVGBW7H010

Break down parts kit
Part No Description Position

S100006 Heat exchanger 2001
S62741 Burner 2003
S62743 Electrode ignition/ionisation 2004
S59118 Glass inspection set 2005
S100015 Siphon assembly 2021
S58733 Sensor temperature (2 pcs) 2023
S100011 Fan assembly 3001
S58685 Gas combination block 3005
S100068 Control board 4001
S59128 Display print board 4002
S100012 Transformer ignition 4003
S43561 Fuse glass 2 amp slow (10pcs) 4006

table 13 Break down parts kit

53

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 12V, 18V, 24V

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

EEC Directive: 90/396/EEC applied standards:
EN 297

92/42/EEC

Remeha Avanta

(1994*), EN 483(1999*), EN 677(1998*)

2006/95/EEC EN 50165

EN 60335-1

2004/108/EEC EN 50165
EN 55014-1
EN 61000-3-2(2000*), EN 61000-3-3(1995*)

97/23/EEC (art. 3, lid 3)
(art.3 section 3)

*) including (if any) completion

Apeldoorn, oktober 2008

W.F. Tijhuis
Approval Manager

*) inclusief (eventuele) aanvulling

(1997*)

(1994*) 05

(1997*)

(2000*), EN 55014-2(1997*)

703/2008/10/68

54

7 REGULATIONS

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

- 2006/95/EEC Electrical low voltage directive

- 2004/108/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 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.

55

Remeha Avanta

8 TECHNICAL SPECIFICATIONS AND WORKING PRINCIPLE

8.1 Technical data

Appliance type Remeha Avanta 12v 18v 24v
General

Gas council number
Boiler control
Nominal output Pn (80/60°C, CH) kW 12.0 17.6 24.7
Nominal output Pn (50/30°C, CH) kW 13.1 19.0 26.5
Nominal input Qn Hi kW 5.8 - 12.3 5.8 - 18.0 6.1 - 25.2
Nominal input Qnw Hi kW 12.3 18.0 25.2
Assembly dry weight kg 20 20 21.5
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 - B23, B33, C13, C33, C43, C53, C63, C83

Gas type permitted - II

Gas inlet pressure natural gas mbar 20 - 25

Gas consumption natural gas maximum m

Gas flue rate kg/h 20.5 31 42.4

Gas inlet pressure propane mbar 37 - 50

Gas consumption propane maximum m

2)

Class

NO

x

NOx annual emission (n = 1) ppm < 30

Residual fan duty (full load) Pa 30 40 50

CH side

Water capacity (heat exchanger and piping) l 1.8 1.8 2.0
Minimum operating water pressure bar 0.1
Maximum operating water pressure PMS bar 3
Water temperature maximum °C 98
Operating temperature maximum °C 80

Water pressure loss dT = 11°C

Electrical

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

- 41-288-09 41-288-06 41-288-10
modulating or on/off

(natural gas and propane)

2H3p

3

/h 1.3 1.8 2.7

n

3

/h 0.5 0.7 1.0

n

-5

1)

mg/kWh < 53

mbar 440

table 14 Summary of technical data

1

) Measured according EN 483 (Class 5 complies with a lim-

ited concentration of NO

2

) This data applies for natural gas.

< 70 mg/kWh)

x

56

1

8.2 The boiler components

2

3

4

5

6

fig. 63 Components of the Remeha Avanta

11

10

9

8

7

59970LTGBW7H045

1. Flue / Air inlet connection

2. Flue gas measuring point

3. Heat exchanger

4. Front plate heat exchanger

5. Syphon

6. Control panel

7. Fan

8. Air inlet tube

9. Gas valve multiblock / Ignition transformer

10. Ignition/ionization electrode

11. Control unit

8.3 Working principle

The Remeha Avanta 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
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 its heat to the system water circulating
around the coils. In the condensing part of the exchanger the
water vapour in the flue gas condense 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.

®

’ and the prevailing temperatures (measured by



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.

8.3.1 Regulating

The Remeha Avanta 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
strip).

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

5. 230 V Switching time clock – compatible with the Remeha
two channel time clock or with any other appropriate time
clock. For further details see par. 2.8.

®

controls.

57

Remeha Avanta

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

will always try to supply heat.

®

’- control prevents unnecessary additional call outs.

8.3.3 Regulating the water temperature

The Remeha Avanta is fitted with an electronic temperature
regulator with flow and return temperature sensors. The flow
temperature can be set to between 20 and 75°C, see 2.10.8
(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 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 ] 22°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 98°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.

58

9 EFFICIENCY DATA AND GAS EFFICIENCY LABELS

9.1 Annual efficiency

108.7 % 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).

59

Remeha Avanta

60

Remeha Avanta

62

63

120579-060309

2

5

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

Tel: [phone]

© 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: [phone]
Internet: uk.remeha.com

www.avantarange.com

E-mail: [e-mail]