Vaillant ecoTEC sustain 24, ecoTEC sustain 28, ecoTEC sustain 34 Installation And Maintenance Instructions Manual
Installation and maintenance instructions
ecoTEC sustain
24, 28, 34
GB
Installation and maintenance instructions
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. +49 21 91 18‑0 Fax +49 21 91 18‑2810
info@vaillant.de www.vaillant.de
Contents
2 Installation and maintenance instructions ecoTEC sustain 0020253094_01
Contents
1 Safety .................................................................... 4
1.1 Action-related warnings ......................................... 4
1.2 Intended use.......................................................... 4
1.3 General safety information .................................... 4
1.4 Regulations (directives, laws, standards).............. 6
2 Notes on the documentation .............................. 7
2.1 Observing other applicable documents ................. 7
2.2 Storing documents................................................. 7
2.3 Validity of the instructions ...................................... 7
2.4 Benchmark............................................................. 7
3 Product description............................................. 7
3.1 Product design....................................................... 7
3.2 Information on the identification plate.................... 8
3.3 Serial number ........................................................ 8
3.4 CE label ................................................................. 8
3.5 Energy Saving Trust Endorsed Products .............. 8
4 Set-up.................................................................... 8
4.1 Transporting the unit.............................................. 8
4.2 Unpacking the product........................................... 9
4.3 Checking the scope of delivery.............................. 9
4.4 Dimensions............................................................ 9
4.5 Minimum clearances............................................ 10
4.6 Clearance from combustible components ........... 10
4.7 Using the installation template............................. 10
4.8 Wall-mounting the product................................... 10
4.9 Removing the front casing................................... 11
4.10 Removing the side section .................................. 11
5 Installation.......................................................... 11
5.1 Installation requirements ..................................... 12
5.2 Gas and water connections ................................. 13
5.3 Connecting the condensate drain pipework ........ 13
5.4 Installing the discharge pipe on the expansion
relief valve............................................................ 13
5.5 Flue installation.................................................... 13
5.6 Electrical installation ............................................ 14
6 Operation............................................................ 16
6.1 Operating concept ............................................... 16
6.2 Installer level overview......................................... 17
6.3 Calling up the installer level ................................. 17
6.4 Using diagnostics codes...................................... 17
6.5 Displaying the status codes................................. 17
6.6 Using check programmes.................................... 17
7 Start-up ............................................................... 18
7.1 Carrying out the initial start-up............................. 18
7.2 Gas type check .................................................... 18
7.3 Checking the factory setting ................................ 18
7.4 Checking and treating the heating water/filling
and supplementary water .................................... 18
7.5 Preventing low water pressure ............................ 19
7.6 Filling the condensate siphon .............................. 19
7.7 Filling and purging the heating installation .......... 19
7.8 Filling the hot water circuit ................................... 20
7.9 Switching the product on and off ......................... 20
7.10 Checking the gas settings ................................... 20
7.11 Checking leak-tightness ...................................... 22
8 Adapting the unit to the installation ................ 22
8.1 Activating diagnostics codes ............................... 22
8.2 Burner anti-cycling time ....................................... 22
8.3 Setting the maximum heating output ................... 23
8.4 Setting the maintenance interval ......................... 23
8.5 Setting the pump output....................................... 23
8.6 Setting the bypass ............................................... 24
8.7 Setting the hot water temperature ....................... 24
8.8 Handing the product over to the operator............ 24
9 Troubleshooting ................................................ 24
9.1 Checking service messages................................ 24
9.2 Rectifying faults ................................................... 25
9.3 Calling up the fault memory ................................. 25
9.4 Deleting the fault memory.................................... 25
9.5 Resetting parameters to factory settings ............. 25
9.6 Preparing the repair work .................................... 25
9.7 Replacing defective components......................... 25
9.8 Completing repair work........................................ 28
10 Inspection and maintenance ............................ 28
10.1 Observing inspection and maintenance
intervals ............................................................... 28
10.2 Checking and adjusting the gas ratio setting ....... 28
10.3 Checking the CO₂ content ................................... 29
10.4 Setting the CO₂ content ....................................... 29
10.5 Preparing the maintenance work ......................... 30
10.6 Draining the product ............................................ 30
10.7 Removing the compact thermal module .............. 30
10.8 Cleaning the heat exchanger............................... 31
10.9 Checking the burner ............................................ 31
10.10 Checking the ignition electrode ........................... 31
10.11 Cleaning the condensate siphon ......................... 32
10.12 Cleaning the filter in the cold water inlet .............. 32
10.13 Cleaning the heating filter.................................... 32
10.14 Installing the compact thermal module ................ 32
10.15 Checking the product for leak-tightness .............. 33
10.16 Checking the admission pressure of the
expansion vessel ................................................. 33
10.17 Completing inspection and maintenance work .... 33
11 Decommissioning.............................................. 33
11.1 Permanently decommissioning the product......... 33
12 Recycling and disposal..................................... 33
13 Customer service............................................... 33
Appendix ............................................................................ 34
A Check programmes – Overview ....................... 34
B Overview of diagnostics codes........................ 34
C Status codes – Overview .................................. 38
D Overview of fault codes .................................... 39
Contents
0020253094_01 ecoTEC sustain Installation and maintenance instructions 3
E Wiring diagrams................................................. 41
E.1 Wiring diagram..................................................... 41
E.2 Wiring diagram..................................................... 42
F Inspection and maintenance work –
Overview............................................................. 43
G Opening in the flue pipe .................................... 44
G.1 Positioning of the opening of a fan-supported
flue gas pipe ........................................................ 44
G.2 Horizontal terminal positioning ............................ 45
H Commissioning Checklist ................................. 46
I Technical data.................................................... 50
Index ................................................................................... 53
1 Safety
4 Installation and maintenance instructions ecoTEC sustain 0020253094_01
1 Safety
1.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in
accordance with the severity of the possible
danger using the following warning signs and
signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of
severe personal injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental
damage
1.2 Intended use
There is a risk of injury or death to the user or
others, or of damage to the product and other
property in the event of improper use or use
for which it is not intended.
The product is intended as a heat generator
for closed heating installations and for hot
water generation.
Depending on the gas-fired boiler type, the
products referred to in these instructions
must only be installed and operated in conjunction with the air/flue pipe accessories listed in the other applicable documents.
Intended use includes the following:
– observance of accompanying operating,
installation and servicing instructions for
the product and any other system components
– installing and fitting the product in accord-
ance with the product and system approval
– compliance with all inspection and main-
tenance conditions listed in the instructions.
Intended use also covers installation in accordance with the IP class.
Any other use that is not specified in these
instructions, or use beyond that specified in
this document shall be considered improper
use. Any direct commercial or industrial use
is also deemed to be improper.
Caution.
Improper use of any kind is prohibited.
1.3 General safety information
1.3.1 Risk caused by inadequate
qualifications
– Set-up
– Disassembly
– Installation
– Start-up
– Maintenance
– Repair
– Decommissioning
▶ Observe all instructions that are included
with the product.
▶ Proceed in accordance with the current
state of technology.
▶ Observe all applicable directives, stand-
ards, laws and other regulations.
1.3.2 Risk of injury due to the heavy
weight of the product
▶ Make sure that the product is transported
by at least two people.
1.3.3 Risk of death from escaping gas
What to do if you smell gas in the building:
▶ Avoid rooms that smell of gas.
▶ If possible, open doors and windows fully
and ensure adequate ventilation.
▶ Do not use naked flames (e.g. lighters,
matches).
▶ Do not smoke.
▶ Do not use any electrical switches, mains
plugs, doorbells, telephones or other communication systems in the building.
▶ If it is safe to do so, close the emergency
control valve or the main isolator.
▶ If possible, close the gas isolator cock on
the product.
▶ Warn other occupants in the building by
yelling or banging on doors or walls.
▶ Leave the building immediately and ensure
that others do not enter the building.
Safety 1
0020253094_01 ecoTEC sustain Installation and maintenance instructions 5
▶ Notify the gas supply company or the Na-
tional Grid +44 (0) 800 111999 by telephone once you are outside of the building.
1.3.4 Risk of death from escaping flue
gas
If you operate the product with an empty condensate siphon, flue gas may escape into the
room air.
▶ In order to operate the product, ensure that
the condensate siphon is always full.
1.3.5 Risk of death from leaks if the
product is installed below ground
level
Liquid gas accumulates at floor level. If the
product is installed below ground level, liquid
gas may accumulate at floor level if there
are any leaks. In this case, there is a risk of
explosion.
▶ Make sure that liquid gas cannot escape
from the product or the gas line under any
circumstance.
1.3.6 Risk of death due to blocked or
leaking flue gas routes
Installation errors, damage, tampering, unauthorised installation sites or similar can cause
flue gas to escape and result in a risk of poisoning.
What to do if you smell flue gas in the property:
▶ Open all accessible doors and windows
fully to provide ventilation.
▶ Switch off the product.
▶ Check the flue gas routes in the product
and the flue gas diversions.
1.3.7 Risk of poisoning and burns caused
by escaping hot flue gases
▶ Only operate the product if the air/flue pipe
has been completely installed.
▶ With the exception of short periods for
testing purposes, only operate the product
when the front casing is installed and
closed.
1.3.8 Risk of death due to explosive and
flammable materials
▶ Do not use or store explosive or flammable
materials (e.g. petrol, paper, paint) in the
installation room of the product.
1.3.9 Risk of death due to cabinet-type
casing
Cabinet-type casing can give rise to dangerous situations when used on a product which
is operated with an open flue.
▶ Ensure that the product is supplied with
sufficient combustion air.
1.3.10 Risk of poisoning caused by
insufficient supply of combustion
air
Conditions: Open-flued operation
▶ Ensure that the air supply to the product's
installation room is permanently unobstructed and sufficient in accordance with the
relevant ventilation requirements.
1.3.11 Risk of death due to lack of safety
devices
The schematic drawings included in this document do not show all safety devices required for correct installation.
▶ Install the necessary safety devices in the
system.
▶ Observe the applicable national and inter-
national laws, standards and guidelines.
1.3.12 Risk of death from electric shock
There is a risk of death from electric shock if
you touch live components.
Before commencing work on the product:
▶ Unplug the mains plug.
▶ Or disconnect the product from the power
supply by switching off all power supplies
(electrical partition with a contact opening
of at least 3 mm, e.g. fuse or line protection switch).
▶ Secure against being switched back on
again.
▶ Wait for at least 3 minutes until the con-
densers have discharged.
1 Safety
6 Installation and maintenance instructions ecoTEC sustain 0020253094_01
1.3.13 Risk of being burned or scalded by
hot components
▶ Only carry out work on these components
once they have cooled down.
1.3.14 Risk of material damage caused by
using an unsuitable tool
▶ Use the correct tool to tighten or loosen
screw connections.
1.3.15 Risk of material damage caused by
frost
▶ Do not install the product in rooms prone
to frost.
1.3.16 Risk of corrosion damage due to
unsuitable combustion and room
air
Sprays, solvents, chlorinated cleaning
agents, paint, adhesives, ammonia compounds, dust or similar substances may lead
to corrosion on the product and in the flue
gas guiding.
▶ Ensure that the supply of combustion air is
always free of fluorine, chlorine, sulphur,
dust, etc.
▶ Ensure that no chemical substances are
stored at the installation site.
▶ If you are installing the product in
hairdressing salons, painter's or joiner's
workshops, cleaning businesses or similar
locations, choose a separate installation
room in which the room air is technically
free of chemical substances.
1.4 Regulations (directives, laws,
standards)
▶ Observe the national regulations, stand-
ards, guidelines and laws.
Notes on the documentation 2
0020253094_01 ecoTEC sustain Installation and maintenance instructions 7
2 Notes on the documentation
2.1 Observing other applicable documents
▶ You must observe all the operating and installation in-
structions included with the system components.
2.2 Storing documents
▶ Pass these instructions and all other applicable docu-
ments on to the system operator.
2.3 Validity of the instructions
These instructions apply only to:
Product article number
ecoTEC sustain 24 VUW 246/7-2 (H-
GB)
0010019980
ecoTEC sustain 28 VUW 286/7-2 (H-
GB)
0010019981
ecoTEC sustain 34 VUW 346/7-2 (H-
GB)
0010019982
Gas Council Numbers
ecoTEC sustain 24 VUW 246/7-2 (H-
GB)
47-044-79
ecoTEC sustain 28 VUW 286/7-2 (H-
GB)
47-044-80
ecoTEC sustain 34 VUW 346/7-2 (H-
GB)
47-044-81
2.4 Benchmark
Vaillant is a licensed member of the Benchmark Scheme.
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 a competent person approved
at the time by the Health and Safety Executive 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.
Benchmark is managed and promoted by the Heating and
Hotwater Industry Council.
For more information visit www.centralheating.co.uk
3 Product description
3.1 Product design
3.1.1 Functional elements
20
19
14
13
15
16
18
17
11
12
21
1
3
2
6
4
5
7
9
10
8
1 Electronics box
2 Diverter valve
3 Expansion relief valve
4 Plate heat exchanger
5 Condensate siphon
6 Gas valve
7 Fan
8 Compact thermal
module
9 Ionisation and ignition
electrode
10 Primary heat exchanger
11 Temperature sensor in
the heating flow
12 Temperature sensor in
the heating return
13 Connection for the flue
pipe
14 Flue gas measuring
stub pipe
15 Air intake pipe
16 Expansion vessel
17 Pressure sensor
18 Impeller sensor (hot
water)
19 Automatic air vent
20 Heating pump
21 Bypass
4 Set-up
8 Installation and maintenance instructions ecoTEC sustain 0020253094_01
3.2 Information on the identification plate
The identification plate is mounted on the underside of the
product in the factory.
The identification plate keeps record of the country in which
the product is to be installed.
Information on the
identification plate
Meaning
Condensing technology
Efficiency class of the boiler in accordance with EC Directive 92/42/EEC
Serial number For quality control purposes; 3rd and 4th
digits = year of production
For quality control purposes; 5th and 6th
digits = week of production
For identification purposes; 7th to 16th
digits = product article number
For quality control purposes; 17th to 20th
digits = place of manufacture
... ecoTEC ... Product designation
Cat. Approved gas category
Type: Xx3(x) Permissible flue gas connections
2H / 2E / 3P / 2K... Gas group and gas connection pressure
as set at the factory
Tmax Max. flow temperature
PMS Maximum water pressure in heating
mode
NOx NOx class for the product
V
Hz
Electric connection
W Max. electrical power consumption
IP Protection class
Code (DSN) Specific product code
Heating mode
Qn Nominal heating load range in heating
mode
Pn Nominal heat output range in heating
mode
Pnc Nominal heat output range in heating
mode (condensing technology)
Hot water generation
Qnw Nominal heating load range in hot water
handling mode
Pnw Nominal heat output range in hot water
handling mode
D Specific flow rate
PMW Maximum water pressure in hot water
handling mode
Barcode with serial number
GC No. Gas council number
Note
Make absolutely sure that the product is compatible with the gas group at the installation site.
3.3 Serial number
The serial number can be found on a plastic label at the bottom of the front casing and on the identification plate.
3.4 CE label
The CE label shows that the products comply with the basic
requirements of the applicable directives as stated on the
identification plate.
The declaration of conformity can be viewed at the manufacturer's site.
3.5 Energy Saving Trust Endorsed Products
Only the most energy efficient products can carry the
‘Energy Saving Trust Endorsed Product’ brandmark making
it easy for consumers to choose products that have met strict
energy performance criteria.
Available for: Boilers, Heating controls and chemical inhibitors, the Energy Saving Trust endorsed product brandmark
gives consumers confidence that a product will cost less to
run, help lower energy bills and reduce carbon emissions.
About the Energy Saving Trust
Energy Saving Trust is an independent and impartial organisation that provides trusted energy saving advice to empower millions of people to lead affordable, low energy lifestyles. For more information visit energysavingtrust.org.uk
4 Set-up
4.1 Transporting the unit
Important: With regard to the regulations of 1992 concerning
the manual handling of loads, the unit exceeds the weight
that can be lifted by a single person.
4.1.1 General
▶ Hold the load as close as possible to your body. Do not
twist your body – instead, reposition your feet.
▶ If the unit is being lifted by two persons, ensure your
movements are coordinated during lifting.
▶ Avoid bending your upper body – do not lean forwards or
to the side.
▶ Wear appropriate cut-resistant and non-slip gloves to
protect yourself against sharp edges and maintain a safe
and secure grip.
▶ If required, get somebody to assist you in this.
4.1.2 Unloading the box from the delivery van
▶ It is recommended that two people lift the unit together.
▶ Lift the box using the straps provided.
▶ Use safe lifting techniques – keep your back straight and
bend your legs at the knee.
▶ Hold the load as close as possible to your body.
Set-up 4
0020253094_01 ecoTEC sustain Installation and maintenance instructions 9
▶ If the unit is being lifted by two persons, ensure your
movements are coordinated during lifting.
▶ If required, get somebody to assist you in this.
4.2 Unpacking the product
1. Remove the product from its box.
2. Remove the protective film from all parts of the product.
4.3 Checking the scope of delivery
▶ Check that the scope of delivery is complete and intact.
4.3.1 Scope of delivery
Quantity
Description
1
Heat generator
1
Bag with accessories:
– Hanging bracket
– Bag with seals
– Bag with bolts and rawl plugs
– Installation template
– Flexible condensate drain pipework
– Bag containing the hydraulic connections
1
Enclosed documentation
4.4 Dimensions
99
164
75
110
135
338
58 58
123123
440
125
180
40
123 123
183
65 65
600
720
A
10
1 8
9
10
11
12
2
4
5
6
7
2 43 5 6 7
1 Condensate siphon
(condensate discharge
connection, 21.5 mm
diameter)
2 Heating flow connec-
tion, G3/4
3 Heating expansion relief
valve drain pipework
connection, 15 mm
diameter
4 Hot water connection,
G3/4
5 Gas connection, G1/2
6 Cold water connection,
G3/4
7 Heating return connec-
tion, G3/4
8 Drain cock
4 Set-up
10 Installation and maintenance instructions ecoTEC sustain 0020253094_01
9 Flue pipe wall duct
A = see installation
template (60/100 mm
diameter air/flue pipe)
A = 235 mm
(80/125 mm diameter
air/flue pipe)
10 Product holder
11 R1 tundish/condensate
siphon connection
12 Flue pipe connection
Consult the installation template that is supplied to find the
dimension A.
4.5 Minimum clearances
C C
AB
D
Minimum clearance
A 165 mm: Flue pipe, 60/100 mm diameter
275 mm: Flue pipe, 80/125 mm diameter
B 180 mm; optimum approx. 250 mm
C 5 mm; optimum approx. 50 mm
D 500 mm clearance in front of the heat generator
to enable easy access for maintenance work (the
same as a door opening).
4.6 Clearance from combustible components
It is not necessary to maintain a clearance between the
product and components made of combustible materials that
go beyond the minimum clearances (see page).
4.7 Using the installation template
▶ Use the installation template to ascertain the locations at
which you need to drill holes and make breakthroughs.
4.8 Wall-mounting the product
1
1. Check whether the wall has sufficient load-bearing capacity to bear the operational weight of the product.
2. Check if the supplied fixing material may be used for
the wall.
Conditions: The load-bearing capacity of the wall is sufficient, The fixing
material may be used for the wall
▶ Wall-mount the product as described.
▶ Install the hanging bracket (1) on the wall.
▶ Hang the product on the product bracket from above
using the suspension bracket.
Conditions: The load-bearing capacity of the wall is not sufficient
▶ Ensure that wall-mounting apparatus on-site has a suf-
ficient load-bearing capacity. Use individual stands or
primary walling, for example.
▶ Do not wall-mount the product if you cannot provide
wall-mounting apparatus with a sufficient load-bearing
capacity.
Conditions: The fixing material may not be used for the wall
▶ Wall-mount the product as described using the adapted
fixing material provided on-site.
Installation 5
0020253094_01 ecoTEC sustain Installation and maintenance instructions 11
4.9 Removing the front casing
A
B
B
C
D
▶ Remove the front casing as shown in the illustration.
4.10 Removing the side section
2X
A
B
C
D
Caution.
Risk of material damage caused by mech-
anical deformation.
Removing both side sections may cause
mechanical distortion in the product, which
may cause damage to the piping, for example, and potentially result in leaks.
▶ Always only remove one side section –
never both side sections at the same time.
▶ Remove the side section as shown in the illustration.
5 Installation
Danger!
Risk of explosion or scalding caused by
incorrect installation.
Stresses in the connection cable can cause
leaks.
▶ Make sure there is no stress in the con-
nection cables when they are installed.
5 Installation
12 Installation and maintenance instructions ecoTEC sustain 0020253094_01
Caution.
Risk of material damage due to the gas
leak-tightness test.
At a test pressure of >11 kPa (110 mbar), gas
leak-tightness tests may cause damage to
the gas valve.
▶ If, during gas leak-tightness tests, you
also place the gas lines and the gas valve
in the product under pressure, use a max.
test pressure of 11 kPa (110 mbar).
▶ If you cannot limit the test pressure to
11 kPa (110 mbar), close any gas isolator
cocks that are installed upstream from the
product before you carry out the gas leaktightness test.
▶ If, during gas leak-tightness tests, you
have closed the gas isolator cock that is
installed upstream of the product, relieve
the gas line pressure before you open this
gas isolator cock.
Caution.
Risk of material damage caused by corro-
sion
Due to non-diffusion-tight plastic pipes in the
heating installation, air gets into the heating
water. Air in the heating water causes corrosion in the heat generator circuit and in the
product.
▶ If you use non-diffusion-tight plastic pipes
in the heating installation, ensure that no
air gets into the heat generator circuit.
Caution.
Risk of material damage due to heat trans-
fer during soldering.
▶ Only solder connection pieces if the con-
nection pieces are not yet screwed to the
service valves.
Caution.
Risk of material damage caused by
changes to the connected pipes.
▶ Only bend connection pipes if they have
not yet been connected to the product.
5.1 Installation requirements
5.1.1 Information on liquid gas operation
In the as-delivered condition, the product is preset for operation with the gas group indicated on the identification plate.
If you have a product that has been preset for operation with
natural gas, you must convert it to run on liquid gas. You will
need a conversion kit for this. The conversion procedure is
described in the manual supplied with the conversion kit.
5.1.2 Purging the liquid gas tank
If the liquid gas tank is not purged properly, this may result in
ignition problems.
▶ Ensure that the liquid gas tank has been purged properly
before installing the product.
▶ If required, contact the filler or the liquid gas supplier.
5.1.3 Using the correct type of gas
Using the incorrect type of gas may cause fault shutdowns in
the product. Ignition and combustion noise may occur in the
product.
▶ Only use the gas type listed on the identification plate.
5.1.4 Required preliminary work
1. Make sure that the existing gas meter is capable of
passing the rate of gas supply required.
2. Install a system separator (to be provided on-site) directly on the cold water connection for the combination
unit.
3. Check that the volumetric capacity of the expansion
vessel is sufficient for the system volume.
▽ If the volume of the expansion vessel is insufficient
for the system.
▶ Install an additional expansion vessel in the
heating return, as close to the product as possible.
▶ Install a non-return flap at the product's outlet
(heating flow).
4. Ensure that the system has the following components:
– A cold water stop cock for the unit
– A gas stopcock for the unit
– A filling and draining device in the heating installa-
tion
Installation 5
0020253094_01 ecoTEC sustain Installation and maintenance instructions 13
5.2 Gas and water connections
1
2
3
4
5
1 Heating flow connec-
tion, G3/4
2 Hot water connection,
G3/4
3 Gas connection, G1/2
4 Connection for the cold
water supply line, G3/4
5 Heating return connec-
tion, G3/4
1. Connect the water and gas connections in accordance
with the applicable standards.
2. Purge the gas line before start-up.
3. Check whether the connections (→ Page 22) are leaktight.
4. Check the entire gas line properly for leak-tightness.
5.3 Connecting the condensate drain pipework
min.
180
1
2
▶ Follow the instructions listed here and observe directives
and local regulations on condensed water discharge.
▶ Use PVC or another material that is suitable for draining
the non-neutralised condensed water.
▶ If you cannot guarantee that the materials from which the
condensate discharge pipe is made are suitable, install a
system to neutralise the condensate.
Note
The condensate drain pipework must have a
continuous fall (45 mm per metre) and should
whenever possible terminate at a suitable
drain point within the heated envelope of the
building that will remain frost free under long
periods of low external temperatures.
▶ Connect the condensate siphon (1). Use the supplied
condensate drain hose (2) to do this.
▶ Connect a condensate discharge pipe (21.5 mm, not in-
cluded in the scope of delivery) to the condensate discharge hose (2).
▶ During installation remove all burs from inside of cut pipe
work and avoid excessive adhesive which may trap small
pockets of water close to the pipe wall which can freeze
and build into a larger ice plug.
▶ As with other pipe work insulate the condensate dis-
charge pipe to minimise any risk of freezing and beware
when crossing cavities that the fall is maintained and the
pipe sleeved.
You can find further information in the "BS 6798" specification for installing and maintaining gas-fired boilers with a
nominal heat load of less than 70 kW.
5.4 Installing the discharge pipe on the
expansion relief valve
1
1. Ensure that the pipeline is visible.
2. Connect the expansion relief valve (1).
3. The pipe must have a continuous fall and be routed
to a position so that any discharge of water, possibly
boiling, or steam cannot create any danger to persons,
damage to property or external electrical components
and wiring.
◁ The components must be set up in such a way that
you can see the water flowing out.
5.5 Flue installation
5.5.1 Installing and connecting the flue pipe
1. You can find out which flue pipes may be used by con-
sulting the enclosed flue pipe installation manual.
Conditions: Installation in damp rooms
▶ You must connect the product to a room-sealed air/flue
gas installation. The combustion air must not be taken
from the installation site.
Caution.
Risk of poisoning due to escaping flue
gas.
Mineral-oil-based greases can damage the
seals.
▶ Instead of grease, use only water or com-
mercially available soft soap to aid installation.
2. Install the flue pipe using the installation manual.
5 Installation
14 Installation and maintenance instructions ecoTEC sustain 0020253094_01
5.5.2 Replacing the connection piece for the
air/flue pipe as required
1. Replace the connection piece for the air/flue pipe as
required. The product-specific standard equipment is
listed under Technical data.
2. Remove the connection piece for the air/flue pipe – this
is installed at the factory. (→ Page 14)
3.
Alternatives 1 / 2
▶ If required, install the connection piece for the
air/flue pipe, 80/125 mm diameter. (→ Page 14)
3.
Alternatives 2 / 2
▶ If required, install the connection piece with
offset for the air/flue pipe, 60/100 mm diameter.
(→ Page 14)
5.5.2.1 Removing the connection piece for the
air/flue pipe
A
B
C
1. Insert a screwdriver into the gap between the measur-
ing points.
2. Press the screwdriver carefully down.
3. Turn the connection piece anticlockwise as far as it will
go and then remove it by pulling it upwards.
5.5.2.2 Installing the connection piece for the
air/flue pipe, 80/125 mm diameter
1. Remove the connection piece for the air/flue pipe – this
is installed at the factory. (→ Page 14)
2. Insert the alternative connection piece. Pay attention to
the lugs.
3. Turn the connection piece clockwise until it clicks into
position.
5.5.2.3 Installing the connection piece with offset
for the air/flue pipe, 60/100 mm diameter
1. Remove the connection piece for the air/flue pipe – this
is installed at the factory. (→ Page 14)
65
1
2. Insert the alternative connection piece with offset towards the front.
3. Use two screws (1) to secure the connection piece to
the product.
5.6 Electrical installation
The electrical installation must only be carried out by a qualified electrician.
Danger!
Risk of death from electric shock!
Since mains connection terminals L and N remain live even if the on/off button is switched
off:
▶ Switch off the power supply.
▶ Secure the power supply against being
switched on again.
5.6.1 Opening the electronics box
B
B
A
▶ Open the electronics box as shown in the illustration.
Installation 5
0020253094_01 ecoTEC sustain Installation and maintenance instructions 15
5.6.2 Cable route
1
2
1 24-V eBUS cable route
2 230-V eBUS cable route
5.6.3 Wiring
30 mm max.
Caution.
Risk of material damage caused by incor-
rect installation.
Mains voltage at incorrect terminals and plug
terminals may destroy the electronics.
▶ Do not connect any mains voltage to the
eBUS terminals (+/-).
▶ Only connect the mains connection cable
to the terminals marked for the purpose.
1. Shorten the connection cables to the appropriate
lengths to prevent them from causing damage inside
the electronics box.
2. Screw the plug to the connection cable.
3. Plug the plug into the slot provided on the PCB.
5.6.4 Establishing the power supply
1. Observe all valid regulations.
– The applicable regulations state that the connection
must be made via an electrical partition with a contact opening of at least 3 mm at each pole.
– Power supply cable: Flexible line
2. Make sure that the rated voltage of the mains is 230 V.
1
3. Route a three-core power supply cable that complies
with the relevant standards through the grommet and
into the product.
4. Observe the routing of the power supply cable (1) in the
grommet in order to guarantee that there is no strain.
5. Open the electronics box. (→ Page 14)
1
6. Observe the flow of the power supply cable (1) in the
electronics box in order to guarantee that there is no
strain.
7. Provide one common electricity supply for the boiler
and for the corresponding controller:
– Power supply: Single-phase, 230 V, 50 Hz
– Fuse: ≤ 3 A
6 Operation
16 Installation and maintenance instructions ecoTEC sustain 0020253094_01
≤ 30 mm
N
RT
230V~
X1
L
N
RT
L
1
8. Wire the unit. (→ Page 15)
9. Screw the supplied plug (1) to a three-core power supply cable that complies with the relevant standards.
10. Plug the plug for the power supply cable into a suitable
plug socket.
11. Make sure that access to the power supply is always
available and is not covered or blocked.
12. Close the electronics box.
5.6.5 Connecting controllers to the electronic
system
–
+
24V=
RT BUS
Burner
off
X106
BUS24 V
BUSRTB.off
Burn
er
o
f
f
R
T
24V =
-
+
BUS
X2
X41
X22
–
+
24V=
RT BUS
Burner
off
X106
1
2 3
4
1 Safety thermostat for
underfloor heating
2 24 V (ON/OFF) control
3 eBUS controller or radio
receiver unit
4 Outside temperature
sensor, wired
1. Open the electronics box (→ Page 14).
2. Wire the unit. (→ Page 15)
3. Connect the individual components depending on the
type of installation.
Conditions: If you are connecting a controller (230 V).
≤ 30 mm
NL
X1
230V~
RT
▶ Connect the controller to the main plug.
▶ Remove the bridge from the plug 24V=RT.
4. Close the electronics box.
Conditions: Connecting a limit thermostat for underfloor heating
▶ Remove the bridge and connect the limit thermostat to
the Burner off connection.
▶ Close the electronics box.
▶ For multi-circuit controllers (→ Page 17), change the
parameter d.18 from Eco (intermittently operating pump)
to Confort (continuously operating pump).
5.6.6 Connecting additional components via
VR 40 ("2 in 7" multi-functional module)
1. Install the components in accordance with the respect-
ive instructions.
Conditions: Components connected to relay 1
▶ Activate (→ Page 17) D.27.
Conditions: Components connected to relay 2
▶ Activate (→ Page 17) D.28.
6 Operation
6.1 Operating concept
The operating concept and the display and setting facilities
of the operator level are described in the operating instructions.
An overview of the display and setting options in the installer
level can be found in the section "Overview of the installer
level". (→ Page 17)
Operation 6
0020253094_01 ecoTEC sustain Installation and maintenance instructions 17
6.2 Installer level overview
6.3 Calling up the installer level
1. Only call up the installer level if you are a competent
person.
2.
Press and ("i") at the same time.
◁ S.xx (current unit status) appears in the display,
followed by the heating flow temperature and the
heating installation pressure.
3.
Press to access the installer level.
◁ SoF and the software version appear in the display.
4.
Press .
◁ c.00 appears in the display.
5.
Press the or button to change the installer code.
– Installer code: 17
6.
Confirm by pressing .
7.
Press to access the diagnostics codes (d.), the
check programmes (P.) and the fault codes (F.) and to
return to the diagnostics codes (d.).
8.
Use or to set the required value .
◁
appears in the display.
9.
Confirm by pressing .
10.
Use or to set the required value .
◁
appears in the display if the value can be set.
◁ "no" appears in the display if the value cannot be
set.
11.
Confirm by pressing .
12.
Press to cancel a setting or exit the installer level.
6.4 Using diagnostics codes
You can use the parameters marked as adjustable in the
table of diagnostics codes to adapt the product to the system
and customer requirements.
6.4.1 Setting a diagnostics code
1. Call up the installer level. (→ Page 17)
◁ d.-- is shown in the display.
2.
Press the or button to select the diagnostics
code.
3.
Press to confirm.
4.
Press the or button to set the value of the diagnostic code.
5.
Press to confirm.
6.
Press to return to the sequence.
◁ The diagnostics codes are shown in the display
once again.
7. Proceed accordingly for all parameters that need to be
changed.
8.
Press the button 2 times to exit the diagnostics code
configuration.
◁ The display switches to the basic display.
6.5 Displaying the status codes
The status codes display the product's current operating
status.
Status codes – Overview (→ Page 38)
6.5.1 Live Monitor (status codes)
1.
Press and ("i") at the same time.
◁ The S.xx message appears in the display, followed
by information about the installation (→ Activating
access for the competent person).
2.
Press .
◁ The display switches to the basic display.
6.6 Using check programmes
By activating various check programmes, you can trigger
various special functions on the product.
Check programmes – Overview (→ Page 34)
6.6.1 Calling up the check programmes
1. Call up the installer level. (→ Page 17)
◁ d.-- is shown in the display.
2.
Press .
◁ P.-- is shown in the display.
3.
Press the or button to select the check
programme.
4.
Press to confirm.
◁ The check programme starts.
5.
Press .
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