CR Remeha Avanta 12v Manual

Great Britain
High-efficiency wall-hung boilers
Avanta 12v - 15v - 18v - 24v - 30v
Installation and service manual
120579-130711

page 1
Benchmark places responsibilities on both manufacturers and installers. The
purpose is to ensure that customers are provided with the correct equipment for their
needs, that it is installed, commissioned and serviced in accordance with the
manufacturer's instructions by competent persons and that it meets the requirements
of the appropriate Building Regulations. The Benchmark Checklist can be used to
demonstrate compliance with Building Regulations and should be provided to the
customer for future reference. Installers are required to carry out installation,
commissioning and servicing work in accordance with the Benchmark Code of
Practice which is available from the Heating and Hotwater Industry Council who
manage and promote the Scheme.
Visit www.centralheating.co.uk for more information.
CONTENTS
INTRODUCTION
1 SAFETY
1.1 General safety
1.2 Safety during assembly and installation
1.3 Safety during installation, inspection and maintenance
2 INSTALLATION
2.1 Scope of delivery
2.2 Mounting the boiler
2.2.1 Installation / maintenance clearance requirements
2.2.2 Dimensions and connection points
2.2.3 Mounting the Remeha Avanta
2.3 Water-side connections
2.3.1 Water flow
2.3.2 System Pump
2.3.3 Pressure loss of the boiler
2.3.4 Open-Vented System
2.3.5 Sealed systems
2.3.6 Additional guidelines for the domestic and CH water
2.3.7 Water treatment
2.3.8 Safety valve discharge
2.3.9 Draining Provision

2.3.10 Connecting the 'CH return'
2.3.11 Connecting 'CH flow'
2.3.12 Connecting condensate drain
2.4 Gas-side connections
2.4.1 Additional guidelines for gas connections
2.4.2 Adjusting boiler to other gas-type
2.4.3 Connecting the gas supply
2.5 Flue terminal and air supply connections
2.5.1 Flue terminal positions
2.5.2 Room sealed flue
2.5.3 Connecting the flue terminal and air supply
2.6 Electrical connection
2.6.1 The control unit
2.7 Connecting external controls
2.7.1 Connecting an on/off control - room temperature (volt free switching)
2.7.2 Connecting a time control using an external 230 V clock
2.7.3 Connecting a 230 V time clock in combination with a modulating room control
2.7.4 Connecting a modulating control - room or outside compensation
2.7.5 Connecting an outside temperature sensor
2.7.6 Connecting the DHW sensor/thermostat
2.7.7 Connecting a three-way valve
2.7.8 Connecting a frost thermostat
2.7.9 Connecting an external interlock
2.7.10 Connecting remote alarm and boiler run indication
2.7.11 Connecting a PC/PDA
2.8 Connecting an external pump
2.9 Wiring diagram
2.10 Commissioning
2.10.1 Control Panel
2.10.2 Additional guidelines for commissioning
2.10.3 Putting the boiler into operation
2.10.4 Normal start-up procedure
2.10.5 Error during the start-up procedure
2.10.6 Read out settings
2.10.7 Adjust the boiler according to the system
2.10.8 Changing the parameters at service level (with access code)
2.10.9 Changing the maximum output (Hi) for CH operation
2.10.10 Restore factory settings
2.11 Putting the boiler out of operation
2.11.1 Boiler with frost protection, during longer periods of non-use
2.11.2 Boiler without frost protection, during longer periods of non-use
3 INSPECTION AND MAINTENANCE
3.1 Inspection

3.1.1 Checking the flue pipes and air supply pipes for leaks
3.1.2 Checking the condensate siphon
3.1.3 Checking the ignition electrode
3.1.4 Checking the combustion
3.2 Maintenance
4 ERRORS
4.1 General
4.2 Error codes
4.3 Control stop or lock-out
4.4 Error code memory
4.4.1 Error read outs
4.4.2 Deleting errors
5 SERVICE PARTS
5.1 General
6 EC DECLARATION
7 REGULATIONS
7.1 EC regulations
7.2 Remeha factory test
7.3 Additional guidelines
8 TECHNICAL SPECIFICATIONS AND WORKING PRINCIPLE
8.1 Technical data
8.2 The boiler components
8.3 Working principle
8.3.1 Regulating
8.3.2 Advanced boiler control ('abc®'-control)
8.3.3 Regulating the water temperature
8.3.4 Low flow / water protection
8.3.5 High Limit temperature protection
9 EFFICIENCY DATA AND GAS EFFICIENCY LABELS
9.1 Annual efficiency
9.2 Water-side efficiency
page 2
page 3
INTRODUCTION
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.
It is the responsibility of the installer to ensure that all flue systems are installed in
accordance with manufacturers instructions and all the requirements of EN 14471.

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 Remeha 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 974 3070.
When contacting Remeha 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.
page 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.
0800 111 999.
Can you smell smoke or flue gasses? What to do:

•isolate power supply
•open windows and doors
•trace possible leaks and seal them.
1.3 Safety during installation, inspection and maintenance
Under the 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.
page 5
For any issues or circumstances not addressed within these instructions, please call
our After Sales Department 0844 879 7690.
Remeha Avanta OV -
Gas Council numbers:
PIN: 0063BQ3009
Remeha Avanta 12v: 41-288-09
Remeha Avanta 15v: 41-288-13
Remeha Avanta 18v: 41-288-06
Remeha Avanta 24v: 41-288-10
Remeha Avanta 30v: 41-288-14
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.
page 6
2 INSTALLATION
2.1 Scope of delivery
The standard delivery of the Remeha Avanta boiler includes:

- the boiler + mounting bracket;
- nylon plugs and screws for fixing mounting bracket;
- gas cock with gasket + 90° gas pipe ( 22 mm);
- olives and nuts;
- spacers;
- cable glands;
- Wiring diagrams;
- 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 Remeha);
- Installation and Service manual, Quick reference card and
Mounting Template.
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.
fig. 02 Scope of delivery
59970.LT.GB.W7H.006
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.

fig. 03 Clearance requirements
59970LTGBW7H047
Clearances shown are for ease of installation - once fitted it is possible to
enclose the boiler in a cupboard with 25 mm 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.
page 7
2.2.2 Dimensions and connection points
Return connection Ø22 mm
Flow connection Ø22 mm

Gas connection Ø22 mm
Combustion air inlet Ø100 mm (concentric)
Flue duct Ø60 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.

fig. 04 Dimensions and connection points of the Remeha Avanta
59970.LT.GB.W7H.001
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 (Ø8 mm) holes.
•Fit the (Ø8 mm) plugs.
•Core drill the (Ø125 mm) hole for the flue outlet
•Fit (Ø6 mm) screws into the plugs.
•Remove boiler from the box and mount on bracket.

•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
dust etc. 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
page 8
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.
Required water flow at ∆T = 15°C and 11°C
Type
∆T 15
°C
∆T
11°C
m3/h
l/s
m3/h
l/s
12v
0,7
0,19
0,91
0,25
15v
0,88
0,24
1,14
0,32
18v
1,05
0,29
1,37
0,38
24v
1,41
0,39
1,82
0,51
30v
1,76
0,49
2,28
0,63
table 01 Required water flow
2.3.3 Pressure loss of the boiler
1. Avanta 12v, 15v, 18v
2. Avanta 24v, 30v

fig. 06 Pressure loss graph
T002539-A
page 9
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.

fig. 07 Open-Vented system
59970.LT.GB.W7H.004
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).

•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.
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 Remeha. 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
page 10
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:
Fernox, Cookson Electronics
Forsyth Road
Sheerwater
Woking
Surrey GU21 5RZ
Tel No: 01483 793200
Fax No: 01483 793201
Email: [e-mail]
Web site: www.fernox.com
or:
Sentinal 'X100®' manufactured by:
The Heath Business & Technical Park
Runcorn
Cheshire,
WA7 4QX
Tel No: 0800 389 4670
Fax No: 0800 389 4677
Email: [e-mail]
Web site: www.sentinel-solutions.net
page 11
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.