Vaillant ecoTEC plus Series, ecoTEC pro Series, ecoTEC exclusive Series, ECOTEC Instructions For Use Manual

Supplied By www.heating spares.co Tel. [phone]

For the owner

Instructions for use

ecoTEC

Wall hung room sealed fan assisted condensing boilers

GB

Supplied By www.heating spares.co Tel. [phone]

Contents
Specifi ed use
1 Notes on these instructions

Specified use ................................................................ 2

1 Notes on these instructions ........................... 2

1.1 Storage of the documents ...................................... 2

1.2 Symbols used in this manual ................................. 3

1.3 CE marking.................................................................. 3

1.4 Data badge .................................................................. 3

2 Safety ................................................................. 3

2.1 Setup and adjustments ............................................ 3

2.3 Safety instructions ................................................... 3

2.4 Modifications in and around the boiler ............... 3

3 Instructions on operation ................................ 5

3.1 Factory guarantee .................................................... 5

3.1.1 Two year guarantee for ecoTEC plus and three

year guarantee for ecoTEC exclusive boilers....... 5

3.1.2 One year guarantee for ecoTEC pro boilers ...... 5

3.1.3 Registering with us ................................................... 5

3.1.4 Immediate help .......................................................... 5

3.2 Intended use ............................................................... 5

3.3 Care .............................................................................. 5

3.4 Recycling and disposal ............................................ 5

3.4.1 The appliance ............................................................. 5

3.4.2 Packaging .................................................................... 5

4 Operation ........................................................... 6

4.1 Overview of controls on ecoTEC plus and

ecoTEC exclusive ...................................................... 6

4.2 Overview of controls on ecoTEC pro ................... 7

4.3 Initial checks before turning on ............................ 7

4.3.1 Opening the service valves ................................... 7

4.3.2 Checking the system pressure .............................. 8

4.4 Turning the boiler ON .............................................. 9

4.5 Domestic hot water with ecoTEC combination

boilers .......................................................................... 9

4.5.1 Setting the water temperature ............................. 9

4.5.2 Switching the warmstart function on and off ... 9

4.5.3 Drawing hot water (ecoTEC combination

boilers only) ................................................................ 10

4.6 Heating operation ..................................................... 10

4.6.2 Switching off heating (summer operation) ........ 11

4.6.3 Setting a room- or outside temperature

controller ..................................................................... 11

4.7 Status displays ........................................................... 11

4.8 Troubleshooting ........................................................ 12

4.8.1 Problems due to low system water pressure .... 12

4.8.3 Flue problems ............................................................ 12

4.9 Turning off the boiler ............................................... 12

4.10 Frost protection......................................................... 13

4.11 Maintenance and customer service ..................... 13

Specified use

The Vaillant ecoTEC plus, ecoTEC pro and ecoTEC exclusive
models are compact, wall-mounted condensing boilers.
ecoTEC plus and pro combination boilers provides both
central heating and domestic hot water, with the domes­tic hot water supplied directly from the boiler. The boiler
will operate automatically to provide domestic hot water
whenever a hot water tap is opened, and automatically
adjusts to meet the demand for both central heating
and domestic hot water in the most economical way.
ecoTEC system boilers provides central heating and do­mestic hot water where a separate indirect hot water
cylinder is also incorporated to the system.

1 Notes on these instructions

To ensure clarity of information in instructions a new
European standard of advice and symbols is being intro­duced. To ensure compliance with this new standard the
following details are included.
The following information is intended to help you
throughout the boilers entire instruction pack.
We assume no liability for any damage caused by not
following these instructions.

Other instruction supplied with this appliance

For the end user

Short operating instructions
(ecoTEC plus and ecoTEC exclusive only) no. 838404
Warranty card with return envelope
2 years no. 809222
1 year no. 802961

For the installer/service engineer:

Instructions for installation and servicing

- for ecoTEC plus and pro no. 839592

- for ecoTEC exclusive no. 0020017768
Flue installation instructions no. 834449

The instructions for any accessories and controllers
used also apply.
The Benchmark gas boiler commissioning checklist (in
the installation manual) should be completed by the in­staller and/or the commissioning engineer.
If, after reading these instructions, you have any ques­tions on the operation of the boiler, please contact ei­ther your installer or Vaillant Technical Department.

1.1 Storage of the documents

Please store this user manual and all related documents
so that they are available whenever they are required.
If you move please pass on the documents to the buyer.

2 Instructions for use ecoTEC / 838402_06

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Notes on these instructions 1

Safety 2

1.2 Symbols used in this manual

Please observe the safety instructions in this operating
manual for the operation of the appliance.

Danger!

d

Immediate risk of serious injury or death.

Caution!

a

Potentially dangerous situations for the product
and environment.

Note!

h

Useful information and instructions.

• Symbol for a necessary task

1.3 CE marking

The purpose of CE marking is to certify that the boiler
complies with the requirements of the directives cover­ing gasfired appliances (Council directive 90/396/EEC)
and electromagnetic compatibility (Council directive
89/336/EEC). These appliances also comply with the re­quirements of the directive on operating efficiency
(Council directive 92/42/EEC).

Note!

h

Vaillant Ltd. support the Benchmark initiative.
At the rear of the installation manual you will
find the Benchmark gas boiler commissioning
checklist. It is very important that this is com­pleted correctly at the time of instal lation and
commissioning.

1.4 Data badge

The type plate of the Vaillant ecoTEC is attached at the
factory to the bottom of the appliance.

2 Safety

2.1 Setup and adjustments

Installation and adjustment of the boiler as well as serv­ice, maintenance and repair of the boiler may only be
carried out by a competent person in accordance with
the Gas Safety (Installation and Use) Regulations 1998.
(In the U.K. “CORGI”. Registered installers undertake the
work to a safe and satisfactory standard). If the boiler is
installed in a compartment do not obstruct any purpose
provided ventilation openings, and do not use the com­partment for storage purposes.

2.2 What to do in an emergency

Danger

d

Smell of gas. Risk of poisoning and explosion
due to a malfunction

If you smell gas or suspect a gas leak:

• Do not switch lights on or off.

• Do not use any other electrical switches.

• Do not use a telephone in the hazardous area.

• Do not use naked flames, such as matches or ciga­rette lighters.

• Do not smoke.

• Turn off the gas supply at the gas meter.

• Open the windows and doors.

• Warn other residents.

• Get out of the house.

• Consult your gas supplier, service agent or other com­petent person.

Telephone the National emergency number: 0800 1 11 999

2.3 Safety instructions

Always observe the following safety instructions and
regulations.

Danger

d

Inflammable mixtures of gas and air may
explode. Do not use or store explosive or easily
flammable substances such as petrol or paint
in the same room as the appliance.

d

2.4 Modifications in and around the boiler

No modifications may be made to the following items:

- The boiler

- The gas, water and electrical supply

- The flue system

- The safety valve for the heating water

- Any structural changes around the appliance that
could affect the operational safety of the boiler.

Danger

Risk of poisoning and explosion due to a
malfunction. Never put the safety devices
out of operation or tamper with them so as to
impair their function.

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2 Safety

Caution

a

Inappropriate modifications can cause damage.
Never tamper with the boiler or other parts of
the system.
Never attempt to perform maintenance or re­pairs yourself.

- Do not damage or remove seals on components. Only
authorised engineers or our customer service may re­moved sealed components.

Danger

d

Risk of scalding.
The water coming out of the tap can be very
hot (ecoTEC combination boiler only).

Caution

a

Risk of damage.
Do not use sprays, solvents, chlorinated clean­ing agents, paint, adhesives or similar sub­stances in the vicinity of the appliance. These
substances can cause corrosion, including in
the flue system.

Installation and setting

Note

h

It cannot be guaranteed that water will circu­late throughout the entire heating system.

If the boiler is not operated for several hours during
very cold weather there is therefore the possibility of
the system freezing.
Please ensure that if you are absent during a period of
frost the central heating remains in operation and all
rooms are kept above freezing point.
It must be remembered, however, that the boiler will be
automatically switched off by the built in monitoring de­vices if certain faults occur, e.g. interruption in the gas
or electricity supply or faults in the flue gas system. To
overcome this possibility you can drain both the central
heating system and boiler.

Note

h

Frost protection and monitoring devices can
only function when the main switch of the unit
is set to the “I” position and the boiler is con­nected to the electrical supply.

Important

a

The appliance must be installed and serviced by
a competent person as stated in the Gas Safety
(Installation and Use) Regulations 1998. In IE,
the installation must be in accordance with the
current edition of I.S.813 ‘Domestic Gas Instal­lations’, the current Building Regulations and
reference should be made to the current ETCI
rules for electrical installation.

Caution

a

The appliance may only be operated with its
case properly and permanently closed.
Otherwise, in unfavourable conditions, material
damage or even injury or death can result.

Filling pressure of the heating system

Regularly check the filling pressure of the heating sys­tem (see 4.3.2).

Leaks (ecoTEC combination boiler only)

If there is a leak in the water pipes between the appli­ance and the taps, immediately turn off the cold water
service valve and have your engineer repair the leak.

Frost protection

Your boiler is equipped with a frost protection function:
If the heating water temperature drops below 5 °C when
the main switch is ON, then the boiler goes into opera­tion and heats the boiler circuit to approx. 30 °C.

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Instructions on operation 3

3 Instructions on operation

3.1 Factory guarantee

3.1.1 Two year guarantee for ecoTEC plus and three

year guarantee for ecoTEC exclusive boilers

Vaillant undertakes to rectify any manufacturing defect
that occurs within twenty four months (ecoTEC plus) or
thirty six months (ecoTEC exclusive) of the installation
date.
For the 2nd or 3rd years of the guarantee to be valid
an annual service must be carried out by a CORGI regis­tered installer commencing one year after installation.
The cost of this annual service is not included in the
guarantee.

3.1.2 One year guarantee for ecoTEC pro boilers

Vaillant undertakes to rectify any manufacturing defect
that occurs within twelve months of the installation
date.

3.1.3 Registering with us

Registration is simple. Just complete the Guarantee
Registration Card and return to Vaillant within 30 days
of installation. Your details will then be automatically
registered within the Vaillant scheme.

3.3 Care

• Clean the exterior your appliance with a damp cloth
and a little soap.

Note

h

Do not use scouring or cleaning agent, which
might damage the housing or plastic fittings.

3.4 Recycling and disposal

Both your Vaillant ecoTEC boiler and its packaging con­sist mainly of recyclable raw materials.

3.4.1 The appliance

Do not dispose of your Vaillant ecoTEC boiler or any
of its accessories with household waste. Make sure the
old appliance and any existing accessories are disposed
of properly.

3.4.2 Packaging

Please leave the disposal of the transport packaging
to the expert company which installed the appliance.

Note

h

Please observe the applicable national legal
regulations.

Note

h

No receipt will be issued.

3.1.4 Immediate help

If your Vaillant boiler develops a fault your first action
should be to contact your installer, as his professional
assessment is needed under the terms of our Guaran­tee. If you are unable to contact your installer, phone
Vaillant Service Solutions: 0870 6060 777

3.2 Intended use

Vaillant ecoTEC boilers are state-of-the-art appliances
which have been constructed in accordance with reco­gnised safety regulations. Nevertheless, there is a risk
of injury or death to the user or others and damage to
the appliance or other property in the event of misuse
or use for which the appliance is not intended.
The appliances are designed to generate heat for con­nected hot water central heating systems. Any other
use is considered to be use other than intended. The
manufacturer/supplier is not liable for any resulting
damage. The user alone bears the risk.
Intended use includes the observance of the operating
and installation manual and all other applicable
documents, as well as adherence to the maintenance
and inspection conditions.

Caution

a

Any incorrect use is forbidden.

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4 Operation

4 Operation

4.1 Overview of controls on ecoTEC plus and
ecoTEC exclusive

1

10

9
8

7

6

Fig. 4.1 ecoTEC plus and ecoTEC exclusive controls

For access to the controls open the front flap by pulling
at the centre of the case strip.

1 Display indicating the current heating flow temperature, the

pressure in the heating system, the operating mode or addi-

tional information
2 The “i” information button
3 Built in control/timer (if fitted)
4 Pressure gauge displaying the pressure in the heating system
5 Main ON/OFF control
6 “+” button for moving forward in the display
7 “-” button for moving back in the display or for displaying the

pressure in the heating system
8 “Reset” button
9 Maximum radiator temperature control
10 Maximum hot water temperature control and warmstart ON/

OFF control (ecoTEC plus combination boilers only)

2

3

4

5

shows the current heating flow temperature (in this ex­ample 45 °C). In the event of a fault, an error code ap­pears instead of the temperature. The ecoTEC exclusive
display has also cleartext for a direct information
The display also gives the following information:

1 Indication of the current heating system flow

temperature or water pressure in the heating
system or display of a status or error code

Actual setting of the modulation
(only ecoTEC exclusive)

Abcd...

Clear text display (only ecoTEC exclusive)

Abcd...

Fan speed malfunction

Fan speed malfunction

As long as this symbol appears in the display,
a heating flow temperature and hot water out­let temperature is set by the vrnetDIALOG ac­cessory, which means the appliance uses tem­peratures other than those set using the con­trols (9) and (10).
This condition can only be ended:

- using vrnetDIALOG or

- by a change in temperature at controllers
(9) or (10) of more than 5 K.

This condition cannot be ended:

- with the "Reset" button (8) or

- by turning the appliance off or on.

Heating mode active
Illuminated: Heating mode
Flashing: Anti cycling mode active

Advanced multifunctional display system

Hot water supply active
(ecoTEC plus combination boilers only)

1

Illuminated: Hot water demand

(ecoTEC system boilers only)
Illuminated: Heating of an indirect hot

water cylinder turned on

Flashing: Heating demand from the hot

water cylinder, burner on

Warmstart system active
(ecoTEC plus combination boilers only)
Illuminated: Warmstart turned on
Flashing: Warmstart demand, burner on

Fig. 4.2 Display on ecoTEC plus and ecoTEC exclusive

Internal pump is running
The ecoTEC plus and ecoTEC exclusive appliance is fit­ted with a digital information and analysis system. This

Gas valve is activated
system provides information on the operating status of
your appliance. During normal operation, the display (1)

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Flame with cross:
Boiler is at lock out and will display fault code

Flame without cross:
Normal burner operation

4.2 Overview of controls on ecoTEC pro

11

10

Operation 4

iFP

1
2
3

1

2

bar

4

3

iFP

9
8

7

Fig. 4.3 ecoTEC pro controls

1 Display indicating the current heating flow temperature, the

pressure in the heating system or additional information
2 Indicator lights to display the current operating mode
3 The “i” information button
4 Built in control/timer (if fitted)
5 Pressure gauge displaying the pressure in the heating system
6 Main ON/OFF control
7 “+” button for moving forward in the display
8 “-” button for moving back in the display or for displaying the

pressure in the heating system
9 “Reset” button
10 Maximum radiator temperature control
11 Maximum hot water temperature control and warmstart ON/OFF

4

bar

5

6

Multifunctional display system

ecoTEC pro boiler has a multifunction display (1). When
the main ON/OFF control is in the “ON” position the dis­play will normally show the system CH flow temperature
of water in the boiler circuit (45 °C in the example),
which confirms that the boiler is functioning correctly.

Fig. 4.4 ecoTEC pro indicator lights

1 Display indicating flow temperature or the system pressure or

the relevent fault code.

2 Green warmstart indicator

Illuminated = Warmstart switched ON
Not illuminated = Warmstart is switched OFF and there is no
demand for hot water

Flashing = There is either a demand for hot water or warmstart
3 Yellow indicator - Illuminated = Main burner ignited
4 Red indicator

Illuminated = Boiler is at lock out and will display fault code

4.3 Initial checks before turning on

4.3.1 Opening the service valves

ecoTEC plus and pro

Note

h

If a bottom cover is fitted to the boiler the
service valves are behind this cover.

2
1

As long as this symbol appears in the display,
a heating flow temperature and hot water outlet

4

temperature is set by the vrnetDIALOG accessory,
which means the appliance uses temperatures
other than those set using the controls (10) and (11).
This condition can only be ended:

- using vrnetDIALOG or

- by a change in temperature at controllers (10)
or (11) of more than 5 K.

This condition cannot be ended:

- with the "Reset" button (9) or

Fig. 4.5 Opening the service valves on ecoTEC plus combina-

- by turning the appliance off or on.

3

90˚

tion boilers

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4 Operation

The flow, return and gas service valves are open when

1

the line marking has the same direction as the pipe.

Attention

a

The pressure relief valve is provided for safety
reasons and must not be interfered with.

4

3

90˚

Fig. 4.6.1 Opening the service valves on ecoTEC system boilers

• Ensure that the service valves in the heating flow and
return (4 and 1) and the gas service valve (3) are
open. The flow, return and gas service valves are open
when the screwdriver slot is in the same direction as
the pipework.

• On ecoTEC combination boilers only:
Ensure the cold water service valve (2) is open. This
can be checked by opening a hot water tap and ensur­ing water flows.

Caution

a

The pressure relief valve is provided for safety
reasons and must not be interfered with.

Note

h

A bottom cover is fitted to the appliance. The
service valves are fitted behind this cover.

4.3.2 Checking the system pressure

• Check the water pressure of the system using the
pressure gauge (1) before putting the boiler into oper­ation. For the heating system to operate properly, the
indicator on the pressure gauge must be in the dark
grey zone when the system is cold. This is a filling
pressure between 1.0 and 2.0 bar. If the indicator is in
the light grey area (below 0.8 bar), fill the system up
with water before putting the boiler into operation.

plus/exclusive pro

ecoTEC exclusive

3

2

4

1

Fig. 4.6.2 Opening the service valves on ecoTEC exclusive

• Ensure the cold water service valve (2) is open. This
can be checked by opening a hot water tap and ensur­ing water flows.

• Ensure that the service valves in the heating flow and
return (4 and 3) and the gas service valve (1) are open.

1

Fig. 4.7 Checking the filling pressure of the heating system

Note

h

The ecoTEC boiler has a pressure gauge and a
digital pressure display.
The pressure gauge allows you to quickly check
whether the filling pressure is in the correct
range, even when the appliance is switched off.
When the appliance is in operation, you can see
the exact pressure in the display. Activate the
pressure display by pressing the “-” button (2).
After 5 seconds the display returns to the flow
temperature.

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Note

h

Your appliance has a pressure sensor.
If the pressure falls below 0.6 bar the pressure
flashes in the display.
If it falls below 0.3 bar the appliance switches
off. The error message F.22 appears in the dis­play. The system must be filled with water be­fore you start up the appliance again.

4.4 Turning the boiler ON

2

1

Fig. 4.8 Switching on the appliance (example: ecoTEC plus)

• Use the main ON/OFF control to switch the appliance on.
I: “ON” – 0: “OFF”

When you switch on the appliance, the current operat­ing status appears in the display (2).
To adjust the appliance according to your requirements,
read sections 4.5 and 4.6, which describe the setting
options for hot water supply and heating.

Operation 4

plus/exclusive pro

2

3

Fig. 4.9 Setting the water temperature

Note

h

This control adjusts the maximum domestic hot
water temperature. If adjusting the control up­wards appears to have no effect on the temper­ature, then the boiler is already operating at
full output for the selected flow rate.

When you adjust the required temperature, the set
value is shown in the display (2). After five seconds the
display returns to standard mode (the current heating
flow temperature).

Caution

a

If you live in a hard water area please do not set
the control knob (3) above the mid (12 o’clock)
position to prevent excessive scale formation.

Caution

a

Risk of damage.
The boiler frost protection and monitoring sys­tems are only active when the main ON/OFF con­trol of the appliance is in the “I” position and it is
not disconnected from the main power supply.

4.5 Domestic hot water with ecoTEC combination

boilers

The boiler must only be used when the heating system
contains water (see 4.3.2).

4.5.1 Setting the water temperature

• Switch on the appliance as described in section 4.4.

• The domestic hot water temperature can be adjusted
using the hot water temperature control (3).

• Turn the control clockwise to increase the tempera­ture and anti-clockwise to decrease the temperature.
This corresponds to:

- left limit approx. 35 °C

- right limit max. 65 °C.

4.5.2 Switching the warmstart function on and off

The warmstart system of the ecoTEC combination boil­ers provides you with hot water at the required temper­ature immediately. To do this, the hot water heat ex­changer of the ecoTEC is kept at a pre-selected temper­ature level and the boiler will therefore periodically op­erate to maintain this temperature.

ecoTEC plus and ecoTEC exclusive

• Activate the warmstart system by briefly turning the

knob (1) all the way clockwise (position a).

Then select the desired hot water outlet temperature
again, e.g. setting b (refer to Section 4.5.1). The appliance
automatically adapts the hot holding temperature to the
set hot water temperature. The tempered water is directly
available at the taps; the symbol

• Switch off the warmstart system by briefly turning the
knob (1) all the way anti-clockwise (position c). The
symbol
water outlet temperature again, e.g. setting b.

disappears. Then select the required hot

flashes in the display.

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4 Operation

1

1

Fig. 4.10 Switching the warmstart system on and off with

ecoTEC plus and ecoTEC exclusive

b

a

b

c

ecoTEC pro

1

b

a

b

1

Fig. 4.12 Drawing off hot water (example: ecoTEC plus)

4.6 Heating operation

The boiler must only be used when the heating system
contains water (see 4.3.2).

4.6.1 Setting the maximum radiator temperature

control

plus/exclusive

2

2

c

12

Fig. 4.11 Switching the warmstart system on and off with eco-

TEC pro

1

• Activate the warmstart system by briefly turning the
knob (1) all the way clockwise (position a). The green
LED (2) lights up. Then select the required tempera-

Fig. 4.13 Setting the maximum radiator temperature control

ture, e.g. setting b, see 4.5.1.

Set the maximum radiator temperature control to the
The water is kept at a constant temperature of 55 °C
and is available immediately as you turn on a tap.

• Switch off the warmstart system by briefly turning the

knob (1) all the way anti-clockwise (position c). The
green LED (2) goes out. Then select the required hot

desired setting using the control knob (1).

We recommend the following settings:

– Left setting during spring and autumn,

– Middle setting during mild winter,

– Right setting during cold winter.

water outlet temperature again, e.g. setting b.

When you adjust the temperature, the set value is

4.5.3 Drawing hot water (ecoTEC combination

boilers only)

On opening a hot water tap (1) at a supply point (basin,
shower, bath, etc) the ecoTEC combination boiler will
automatically operate to deliver hot water.
On closing the tap the boiler switches OFF (or continues
to operate for central heating if required).

shown in the display (2). After five seconds the display

returns to standard mode (the current heating flow tem-

perature). Normally you can adjust the knob (1) continu-

ously up to a flow temperature of 75 °C. However, high-

er temperatures can be set on your appliance, have

your engineer make adjustments so that you can oper-

ate the heating system at higher flow temperatures.

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Operation 4

4.6.2 Switching off heating (summer operation)

plus/exclusive

1

Fig. 4.14 Switching off heating (summer operation)

You can switch off the heating in summer without
switching off the hot water supply.

• Turn the knob (1) for setting the maximum radiator

temperature all the way to the left.

4.6.3 Setting a room- or outside temperature

controller

1

2

Fig. 4.15 Setting a room- or outside temperature controller

• Set the room thermostat (1) and/or the thermostatic

radiator valves (2) according to the instructions sup­plied with the control(s).

Note

h

Vaillant offer room thermostat/time control ac­cessories which give accurate and economic room
temperature control as well as improved comfort.

The boiler will now operate automatically to provide
central heating for the conditions selected on the exter­nal controls (ecoTEC combination boilers will also pro­vide domestic hot water on demand). After the boiler
stops operating the pump will continue to operate for a
short period to fully disperse the heat from the boiler.

Note

h

The boiler incorporates an anti-cycling eco­nomiser control to prevent energy wasteful
ON and OFF operation of the boiler for short
periods when in the central heating mode.
When turning the room thermostat to a higher
setting there may therefore be a short delay
before the boiler operates.

4.7 Status displays

plus/exclusive

2

1

Fig. 4.16 Status displays

Display Meaning

Displays during heating operation

S. 0 No heat required
S. 1 Pump running
S. 3 Ignition sequence (heating operation)
S. 4 Burner ignited
S. 6 Fan and pump overrun
S. 7 Pump overrun
S. 8 Anti-cycling mode (after heating operation)
S.30 Room thermostat 3/4 no heating demand
S.31 Summer mode active
S.34 Frost protection mode

Displays in hot water operation (ecoTEC combina­tion boilers only)

S.10 Hot water demand
S.14 Burner ignited

Displays for hot holding operation
(ecoTEC combination boilers only)

S.20 Hot holding request
S.24 Hot burner holding operation on

Displays in cylinder charging mode
(ecoTEC system boilers only)

S.20 Cylinder charging request
S.24 Cylinder charging burner on

Table 4.1 Status codes (selection, a complete set of status

codes can be found in the installation and servicing
manual)

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4 Operation

The status displays provide information on the operat­ing status of the appliance.

• Press the “i” button (1) to activate the status displays.

The display (2) then shows the current status code, for
example “S. 4” for burner operation. The table below
explains the most important status codes.
In switching phases, for example on starting up again
after the flame was extinguished, the status message
“S.” briefly appears.

• Press the “i” button (1) again to switch the display

back to normal mode.

Note

h

The ecoTEC exclusive display has also cleartext
for a direct information

4.8 Troubleshooting

In the unlikely event that a problem occurs with the oper­ation of the ecoTEC boiler, the following points should be
checked:

Boiler fails to operate:

– Is the gas supply turned on (see 4.3.1)?
– Is the water supply turned on (ecoTEC combination

boilers only, see 4.3.1)?
– Is there enough water in the heating system (see 4.3.2)?
– Is the electrical supply switched ON?
– Is the main ON/OFF control in the “ON” position

(switch position “I”, see 4.4)?
– Is there an ignition problem (see 4.8.2)?

Hot water operates but no central heating (ecoTEC
combination boilers only)

- Is the heating turned ON (see 4.6.1)?

- Are all external heating controls ON (see 4.6.3)?

Caution

a

Inappropriate modifications can cause damage.
If your boiler still does not operate then please
consult your installer or Vaillant Service Solu­tions (0870 6060 777).

Automatic ignition can only take place after you manu­ally reset the fault.

• To reset the fault, press the reset button (3) and hold
it down for one second.

plus/exclusive pro

3

Fig. 4.17 Troubleshooting

Caution

a

If the boiler still shuts off after three attempts
of resetting, please consult your installer or
Vaillant Service Solutions.

4.8.3 Flue problems

The appliances are fitted with a fan. If the fan does not
work properly, the appliance will switch itself off.
The display shows the symbols
message “F.32”.

Note

h

If contacting Vaillant Service Solutions please
remember to quote the fault code, as this will
help to pinpoint the fault.

4.9 Turning off the boiler

and and the fault

4.8.1 Problems due to low system water pressure

The device switches to “Fault” if the water pressure in
the heating system is too low. This malfunction is indi­cated by the fault code “F.22” (dry fire) or “F.23” or
“F.24” (lack of water).
You can only start up the appliance again when the
heating system is sufficiently filled with water.

4.8.2 Ignition problems

If the burner fails to ignite after five attempts, the de­vice does not start up and switches to “Fault”. This is in­dicated by the fault code “F.28” or “F.29” in the display.
On ecoTEC plus appliances the display also shows the
flame symbol with a cross through it (1). On ecoTEC pro
appliances, the red LED (2) also lights up.

12 Instructions for use ecoTEC / 838402_06

Fig. 4.18 Switching off the appliance

• Turn the main ON/OFF control (1) to the „0“ position.

1

Supplied By www.heating spares.co Tel. [phone]

Operation 4

Caution

a

The boiler frost protection and monitoring sys­tems are only active when the main ON/OFF
control of the appliance is in the “I” position
and it is not disconnected from the main power
supply.

To ensure that these protection devices remain active,
switch your boiler on and off using the external controller.

Note

h

If the appliance is switched off for a long time
(for example when you are on holiday) you
should also turn off the gas supply, the cold
water service valve and the electrical supply.

Note

h

Do not turn the ecoTEC system boilers OFF if
a hot water cylinder is also incorporated in the
system unless there is no demand for domestic
hot water.

4.10 Frost protection

The frost protection feature only protects the boiler.
Any other parts of the system liable to frost damage
should be protected accordingly.

Danger

d

Risk of injury and damage due to improper
handling.
Never attempt to perform maintenance or
repairs on the appliance yourself.
Have a specialist heating company do the work.
We recommend signing a service agreement.
The reliability of the appliance can be impaired,
resulting in damage to property or personal
injury if maintenance work is not carried out.

Regular servicing ensures maximum efficiency and eco­nomical operation of your gas boiler.

Caution

a

The frost protection and monitoring systems
are only active when the main ON/OFF control
of the appliance is in the “I” position and it is
not disconnected from the main power supply.

Frost protection function

The boiler has a frost protection function.
If the heating flow temperature falls below 5 °C with the
main ON/OFF control turned on, the appliance starts up
and heats the boiler to 30 °C.

Caution

a

Parts of the system may freeze.
The frost protection function cannot guarantee
that water flows through the entire heating
system.

4.11 Maintenance and customer service

Inspection and maintenance

Permanent operational readiness, reliability and a long
service life require inspections and maintenance work to
be regularly carried out by a heating engineer or Vaillant.
For further details please contact Vaillant Service Solu­tions: (0870 6060777).

13Instructions for use ecoTEC / 838402_06

Supplied By www.heating spares.co Tel. [phone]

Supplied By www.heating spares.co Tel. [phone]

bar

VRT/VRC

iFP

+20 C

+15 C

+20 C

+5 C

bar

ecoTEC pro

ecoTEC plus / exclusive

Supplied By www.heating spares.co Tel. [phone]

838402_06_GB 03 2008