Glow-worm ENERGY 25c, ENERGY 30c, ENERGY 35c, Energy 15s, Energy 12s Installation And Maintenance Instructions Manual

Installation and main­tenance instructions

ENERGY

25c
30c
35c

GB, IE

Contents

2 Installation and maintenance instructions ENERGY 0020177746_03

Contents

1 Safety .................................................................... 4

1.1 Action-related warnings ......................................... 4

1.2 Risk caused by inadequate qualifications.............. 4

1.3 Intended use .......................................................... 4

1.4 General safety information .................................... 4

1.5 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 Compartment Ventilation ....................................... 7

3.2 Information on the identification plate.................... 7

3.3 Functional elements: Combination unit ................. 8

3.4 CE label ................................................................. 8

4 Set-up.................................................................... 8

4.1 Transporting the unit .............................................. 8

4.2 Unpacking the product........................................... 8

4.3 Checking the scope of delivery.............................. 8

4.4 Dimensions............................................................ 9

4.5 Minimum clearances.............................................. 9

4.6 Using the mounting template................................. 9

4.7 Wall-mounting the product..................................... 9

4.8 Removing/installing the front casing.................... 10

4.9 Removing/installing the side section ................... 10

5 Installation.......................................................... 11

5.1 Checking the gas meter....................................... 11

5.2 Gas and water connections ................................. 11

5.3 Connecting the drain pipework for the

expansion relief valve .......................................... 12

5.4 Connecting the condensate discharge pipe ........ 12

5.5 Electrical installation ............................................ 13

6 Operation............................................................ 15

6.1 Using diagnostics codes ...................................... 15

6.2 Displaying the status codes................................. 15

6.3 Using check programmes .................................... 16

7 Start-up ............................................................... 16

7.1 Carrying out the initial start-up............................. 16

7.2 Checking the type of gas ..................................... 16

7.3 Checking the factory setting ................................ 16

7.4 Checking and treating the heating water/filling

and supplementary water .................................... 16

7.5 Avoiding danger arising from insufficient water

pressure............................................................... 17

7.6 Switching on the product ..................................... 18

7.7 Filling and purging the heating installation .......... 18

7.8 Filling the condensate siphon .............................. 18

7.9 Filling the hot water circuit ................................... 18

7.10 Checking and adjusting the gas settings ............. 18

7.11 Checking leak-tightness ...................................... 20

8 Adapting the unit to the heating

installation.......................................................... 21

8.1 Burner anti-cycling time ....................................... 21

8.2 Setting the pump output....................................... 21

8.3 Setting the bypass valve...................................... 22

8.4 Setting the hot water temperature ....................... 22

9 Handing the product over to the end user ...... 22

10 Inspection and maintenance ............................ 22

10.1 Using original seals.............................................. 22

10.2 Observing inspection and maintenance

intervals ............................................................... 22

10.3 Procuring spare parts .......................................... 23

10.4 Checking the CO₂ content ................................... 23

10.5 Setting the CO₂ content ....................................... 23

10.6 Removing the gas-air mixture unit ....................... 24

10.7 Cleaning the heat exchanger............................... 24

10.8 Checking the burner ............................................ 25

10.9 Checking the ignition electrode ........................... 25

10.10 Cleaning the condensate siphon ......................... 25

10.11 Cleaning the filter in the cold water inlet .............. 25

10.12 Cleaning the heating filter.................................... 25

10.13 Installing the gas-air mixture unit ......................... 26

10.14 Draining the product ............................................ 26

10.15 Checking the admission pressure of the

expansion vessel ................................................. 26

10.16 Completing inspection and maintenance work .... 26

10.17 Checking the product for leak-tightness .............. 26

11 Troubleshooting ................................................ 26

11.1 Rectifying faults ................................................... 26

11.2 Calling up the fault memory ................................. 26

11.3 Deleting the fault memory.................................... 26

11.4 Resetting parameters to factory settings ............. 26

11.5 Preparing the repair work .................................... 26

11.6 Replacing defective components......................... 26

11.7 Checking the product for leak-tightness .............. 29

12 Decommissioning the product ......................... 29

13 Customer service............................................... 29

Appendix ............................................................................30

A Check programmes – Overview ....................... 30

B Overview of diagnostics codes........................ 30

C Status codes – Overview .................................. 34

D Overview of fault codes .................................... 35

E Wiring diagram: Combi boiler .......................... 37

F Wiring diagram: Combi boiler (35 kW) ............ 38

G Inspection and maintenance work –

Overview............................................................. 39

H Position of the opening in the air/flue pipe ..... 40

H.1 Positioning of the opening of a fan-supported

flue gas pipe ........................................................ 40

H.2 Horizontal terminal positioning ............................ 41

I Commissioning Checklist................................. 42

Contents

0020177746_03 ENERGY Installation and maintenance instructions 3

J Pipe lengths for the air/flue pipe ...................... 46

J.1 Length of the C13 type air/flue pipe..................... 46

J.2 Length of the C33 type air/flue pipe..................... 46

J.3 Length of the C43 type air/flue pipe..................... 46

K Technical data.................................................... 46

Index ...................................................................................49

1 Safety

4 Installation and maintenance instructions ENERGY 0020177746_03

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 Risk caused by inadequate
qualifications

– Set-up
– Dismantling
– Installation
– Start-up
– Inspection and maintenance
– Repair
– Decommissioning

▶ Observe all instructions that are included

with the product.

▶ Proceed in accordance with current tech-

nology.

▶ Observe all applicable directives, stand-

ards, laws and other regulations.

1.3 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 unit 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 code.

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 use in industrial or commercial
processes is also deemed to be improper.

Caution.

Improper use of any kind is prohibited.

1.4 General safety information

1.4.1 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.

▶ Notify the gas supply company or the Na-

tional Grid [phone] by tele­phone once you are outside of the build­ing.

Safety 1

0020177746_03 ENERGY Installation and maintenance instructions 5

1.4.2 Risk of death from escaping flue
gas

If you operate the product with an empty con­densate trap / siphon, then flue gas may es­cape into the room air.

▶ In order to operate the product, ensure that

the condensate trap / siphon is always full.

1.4.3 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.

1.4.4 Risk of death due to explosive and
flammable materials

▶ Do not use the product in storage rooms

that contain explosive or flammable sub­stances (such as petrol, paper or paint).

1.4.5 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 gap of at
least 3 mm, e.g. fuse or circuit breaker).

▶ Secure against being switched back on

again.

▶ Wait for at least 3 minutes until the capa-

citors have discharged.

▶ Check that there is no voltage.

1.4.6 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.

1.4.7 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.

1.4.8 Risk of being burned or scalded by
hot components

▶ Only carry out work on these components

once they have cooled down.

1.4.9 Risk of injury due to the heavy
weight of the product

▶ Make sure that the product is transported

by at least two people.

1.4.10 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
system.

▶ 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.

1.4.11 Risk of material damage caused by

frost

▶ Do not install the product in rooms prone

to frost.

1 Safety

6 Installation and maintenance instructions ENERGY 0020177746_03

1.4.12 Risk of material damage caused by
using an unsuitable tool

▶ Use the correct tool to tighten or loosen

threaded connections.

1.5 Regulations (directives, laws,

standards)

▶ Observe the national regulations, stand-

ards, guidelines and laws.

Notes on the documentation 2

0020177746_03 ENERGY 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

Article number Gas Council

Number

ENERGY 25c -A (H­GB)

0010015652 47-019-24

ENERGY 30c -A (H­GB)

0010015653 47-019-25

ENERGY 35c -A (H­GB)

0010015654 47-019-26

2.4 Benchmark

Glow-worm 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 Compartment Ventilation

The boilers are very high efficiency appliances.

As a consequence the heat loss from the appliance casing
during operation is very low.

Compartment ventilation is not required as the products are
only certified, and can only be fitted with a concentric flue
system.

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

Barcode with serial number

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

ENERGY ..c Product description

2H, G20 – 2.0 kPa
(20 mbar)

Factory setting for type of gas and gas
connection pressure

Cat. Approved gas category

Condensing techno­logy

Efficiency class of the boiler in accord­ance with EC Directive 92/42/EEC

Type: Xx3(x) Permissible flue gas connections

PMS Maximum water pressure in heating

mode

PMW Maximum water pressure in hot water

handling mode

V/Hz Electric connection

W Max. electrical power consumption

IP Level of protection

Heating mode

Hot water generation

Pn Nominal heat output range in heating

mode

Pnc Nominal heat output range in heating

mode (condensing technology)

P Nominal heat output range in hot water

handling mode

Qn Nominal heating load range in heating

mode

Qnw Nominal heating load range in hot water

handling mode

T

max.

Max. flow temperature

NOx NOx class for the product

Code (DSN) Specific product code

4 Set-up

8 Installation and maintenance instructions ENERGY 0020177746_03

Information on the
identification plate

Meaning

Read the instructions.

GC no. Gas council number

3.3 Functional elements: Combination unit

15

12

11

10

8

9

7

5

6

4

3

2

1

18

17

20 19

14

16

13

1 Electronics box

2 Heating circuit expan-

sion relief valve

3 Plate heat exchanger

4 Condensate siphon

5 Flue gas pipe

6 Pressure sensor

7 Flue gas analysis point

(for rear flue gas con­nection)

8 Ignition transformer

9 Gas valve

10 Air intake pipe

11 Fan

12 Supply air measuring

stub pipe (for upper flue
gas connection)

13 Flue gas analysis point

(for upper flue gas
connection)

14 Primary heat exchanger

15 Heating expansion

vessel

16 Purge hose

17 Volume flow sensor

18 Heating pump

19 Bypass

20 3-way valve

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.

4 Set-up

4.1 Transporting the unit

Important: With regard to the regulations of 1992 concern-

ing 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. Avoid

rotational movements. 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 suitable non-slip protective gloves in order to pro-

tect your hands against sharp edges. Ensure that you are
carrying the load securely.

▶ 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.
▶ 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 of the product's
components.

4.3 Checking the scope of delivery

▶ Check that the scope of delivery is complete and intact.

Number Designation

1 Heat generator

1 Unit mounting bracket

1

Flexible condensate discharge pipe

6 3/4" seals

4 1/2" seals

1 Service valve

1 Gas stopcock

1 Filling device

Set-up 4

0020177746_03 ENERGY Installation and maintenance instructions 9

Number Designation

2 Connection pipe (heating flow and return)

1 Cold water connection pipe

1 Domestic hot water connection pipe

1 Gas pipe

1 Expansion relief valve discharge pipe

1 Mounting template

1 Enclosed documentation

4.4 Dimensions

96

121

34

123

185

390

123

58 58

170

702

150

280

1 2 3 4 5

7

6

1 Heating flow

2 Hot water connection

3 Gas connection

4 Cold water connection

5 Heating return

6 Connection on the back

of the air/flue pipe

7 Connection on the top

of the air/flue pipe

4.5 Minimum clearances

CC

A

B

D

Minimum clearance

A 150 mm (top air/flue gas connection)

20 mm (air/flue gas connection on the rear)

B 150 mm

C 5 mm

(70 mm if the side panels ought to be removed)

D 600 mm

It is not necessary to maintain a clearance between the
product and components made of combustible materials that
go beyond the minimum clearances.

4.6 Using the mounting template

▶ Use the mounting template to ascertain the locations at

which you need to drill holes.

4.7 Wall-mounting the product

Note

If you are using the rear air/flue gas connection,
install the air/flue pipe before you wall-mount the
product.

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.

4 Set-up

10 Installation and maintenance instructions ENERGY 0020177746_03

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.

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 permitted

fixing material provided on-site.

4.8 Removing/installing the front casing

4.8.1 Removing the front casing

B

C

A

1

1

1. Undo the two screws (1).

2. Gently press the front casing backwards in the centre
so that the latching lug is released.

3. Pull the front casing forwards at the bottom edge.

4. Lift the front casing upwards from the bracket.

4.8.2 Installing the front casing

▶ Refit the components in the reverse order.

4.9 Removing/installing the side section

4.9.1 Removing the side section

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 remove only one side section –

never both side sections at the same time.

Note

If there is sufficient lateral clearance (at least
70 mm), you can remove the side section to fa­cilitate maintenance or repair work.

2x

1

A

B

C

D

1. Tilt the electronics box forward.

2. Hold on to the side section so that it cannot fall and
unscrew both screws (1), one from the top and one
from the bottom.

3. Tilt the side section to the outside and move it down­wards and out.

4.9.2 Installing the side section

▶ Refit the components in the reverse order.

Installation 5

0020177746_03 ENERGY Installation and maintenance instructions 11

5 Installation

Danger!
Risk of scalding and/or damage due to

incorrect installation leading to escaping
water.

Mechanical stresses in the connection pipes
may lead to leaks.

▶ Ensure that there is no mechanical stress

when installing the connection pipes.

Caution.
Risk of material damage caused by

residues in the pipelines.

Welding remnants, sealing residues, dirt or
other residues in the pipelines may damage
the product.

▶ Flush the heating installation thoroughly

before installing the product.

5.1 Checking the gas meter

▶ Make sure that the existing gas meter is capable of

passing the rate of gas supply required.

5.2 Gas and water connections

Caution.
Risk of damage caused by incorrect gas

connection installation.

Excess test pressure or operating pressure
may cause damage to the gas valve.

▶ Check the leak-tightness of the gas valve

using a maximum pressure of 11 kPa
(110 mbar).

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 connectors if the connectors

are not yet screwed to the service valves.

Note

Apply heat insulation to the water pipes to the
boiler outlet and to the installation.

Preliminary work

1. Check that the system volume and the volumetric capa­city of the expansion vessel are compatible.

▽ If the volume of the expansion vessel is insufficient

for the installation.

▶ Install an additional expansion vessel in the

heating return, as close to the product as pos­sible.

▶ Install a non-return valve at the product's outlet

(heating flow).

2. Ensure that the installation has the following compon­ents:

– A cold water stopcock for the unit
– A gas stopcock for the unit
– A filling and draining device in the heating installa-

tion

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 pipe before start-up.

3. Check whether the connections (→ Page 20) are leak­tight.

5 Installation

12 Installation and maintenance instructions ENERGY 0020177746_03

5.3 Connecting the drain pipework for the
expansion relief valve

1

▶ Ensure that the pipeline is visible.
▶ 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 piping must be installed in such a way that you

can see when water drips out.

5.4 Connecting the condensate discharge pipe

1

2

▶ Follow the instructions listed here and observe the legal

and local regulations on condensate discharge.

▶ Use PVC or any other material that is suitable for drain-

ing the non-neutralised condensate.

▶ If you cannot guarantee that the materials from which the

drain pipework is made are suitable, install a system for
neutralising 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 traps (1). Use the supplied drain

hose (2) for this.

▶ Connect a condensate discharge pipe (21.5 mm, not

included in the scope of delivery) to the drain hose (2).

▶ During installation remove all burrs 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.

▶ For any installation the condensate must be free flowing

and not be possible for air back-pressure to prevent wa­ter flow.

▶ 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 specification "BS 6798"
for installing and maintaining gas-fired boilers with a nominal
heat input below 70 kW.

5.4.1 Condensate drainage systems

5.4.1.1 Internal soil and vent pipe

Ø19mm

min

5.4.1.2 External soil and vent pipe

L = 3m max

Ø19mm

min

Ø30mm

5.4.1.3 External termination into a gulley or hopper

L = 3m max

Ø19mm

min

Ø30mm

Installation 5

0020177746_03 ENERGY Installation and maintenance instructions 13

5.4.1.4 Internal termination into combined sink
waste

Ø30mm

Ø19mm

min

5.4.1.5 Internal termination downstream of sink
waste

Ø30mm

Ø19mm

min

5.4.1.6 External termination into soakaway

400mm min

300mm

min

25mm

min

500mm min

Ø100mm

L = 3m max

Ø19mm

min

Ø30mm

5.4.1.7 External termination into rain water down
pipe

Ø19mm

min

Ø30mm

5.5 Electrical installation

Danger!
Risk of death from electric shock!

The power supply terminals L and N remain
live even if the product is switched off:

▶ Switch off the power supply.
▶ Secure the power supply against being

switched on again.

Only qualified electricians may carry out the electrical install­ation.

5.5.1 Opening the electronics box

B

B

A

▶ Follow the instructions in the specified sequence.

5 Installation

14 Installation and maintenance instructions ENERGY 0020177746_03

5.5.2 Closing the electronics box

▶ Follow the instructions in the reverse order.

5.5.3 Cable route

1

2

1 24-V eBUS cable route 2 230-V eBUS cable route

5.5.4 Carrying out the wiring

30 mm max.

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.

5.5.5 Establishing the power supply

1

1. Observe all valid regulations.

2. Make sure that the rated voltage of the mains is 230 V.

3. Provide one common electricity supply for the boiler
and for the corresponding controller:

– Power supply: Single-phase, 230 V, 50 Hz
– Fuse protection: ≤ 3 A

4. Open the electronics box. (→ Page 13)

5. Observe the routing of the power supply cable (1) in the
electronics box in order to guarantee that there is no
strain.

≤ 30 mm

NL

X1
230V~

RT

6. Carry out the wiring. (→ Page 14)

7. Close the electronics box. (→ Page 14)

8. Screw the supplied plug to a three-core power supply
cable that complies with the relevant standards.

9. Connect the plug for the power supply cable.

10. Make sure that access to the power supply is always

freely available and is not covered or blocked by an
obstruction.

Operation 6

0020177746_03 ENERGY Installation and maintenance instructions 15

5.5.6 Connecting controllers to the electronic
system

X2

X22

X41

–

+

24V=

RT BUS

Burner

off

X106

BUS24 V

BUSRTB.off

B
ur
ner

off

R
T

24V

=

-

+

B
U
S

1

4

32

1 Safety thermostat for

floor-standing heating

2 24 V controller

3 eBUS controller or radio

receiver unit

4 Outside temperature

sensor, wired

1. Open the electronics box. (→ Page 13)

2. Carry out the wiring. (→ Page 14)

3. Connect the individual components depending on the

type of installation.

Conditions: If installing a multi-circuit controller.

▶ Change the pump operating mode (d.18) from Eco (in-

termittent pump operating mode) to Comfort (continuous
pump operating mode).

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.

6 Operation

6.1 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.

Overview of diagnostics codes (→ Page 30)

6.1.1 Activating diagnostics codes

1.

Press and hold the button for 7 seconds.

◁

is shown in the display.

2.

Press the or button to set the value.

◁ The access code (96) is reserved for the competent

person.

◁ The access code (35) is reserved for the customer

service.

3.

Press the button to confirm.

◁

is shown in the display.

6.1.2 Setting a diagnostics code

1.

Press the or button to select the diagnostics
code.

2.

Press the button to confirm.

◁ The value and/or status of the diagnostics code is

shown in the display.

3.

Press the or button to set the value.

4. If you allow the value to flash for three seconds, the
setting is automatically confirmed.

◁

is shown in the display for 1 second.

Note

You can manually confirm the setting at any
time by pressing and holding the button
for less than 3 seconds.

5. Proceed accordingly for all parameters that need to be
changed.

6.

Press and hold the button for 3 seconds to finish
configuring the diagnostics codes.

◁ The display switches to the basic display.

6.2 Displaying the status codes

The status codes display the product's current operating
status.

Status codes – Overview (→ Page 34)

6.2.1 Activating the status codes display

1.

Hold the button down for more than 7 seconds.

◁ S.XX is shown on the display, followed by the heat-

ing flow temperature, the internal system pressure
and the cylinder temperature (depending on the ver­sion).

2.

Press the button to exit this menu.

7 Start-up

16 Installation and maintenance instructions ENERGY 0020177746_03

◁ The display switches to the basic display.

6.3 Using check programmes

By activating various check programmes, you can trigger
various special functions on the product.

Check programmes – Overview (→ Page 30)

6.3.1 Calling up the check programmes

1.

Hold the button down for more than 5 seconds.

◁ All symbols are shown in the display.
◁

is shown in the display.

2.

Press and hold the button for five seconds.

◁

is shown in the display.

3.

Press the or button to select the check
programme.

4.

Press the button to confirm.

◁ on is shown in the display and the programme

starts.

5.

Press the and buttons at the same time whilst
running a check programme.

◁ The heating water temperature and the filling pres-

sure for the heating installation are shown altern­ately in the display.

6.

Press the button to return to the check programme.

◁ The display shows the check programme.

7.

Press the button to finish the check programme.

◁ OFF is shown in the display.

8.

Press and hold the button for 3 seconds to finish
the check programmes.

◁ End is shown in the display.
◁ The display switches to the basic display.

Note

If you do not press any button for 15 minutes,
the current programme is automatically can­celled and the basic display is shown.

6.3.2 Displaying the pressure and temperature of
the heating during a check programme

1.

Press the buttons simultaneously.

◁ Display the filling pressure in the heating installation.
◁ Display the heating flow temperature.

2.

Press the button to display the check programme
currently running.

7 Start-up

7.1 Carrying out the initial start-up

Initial start-up must be carried out by a customer service
technician or an authorised competent person using the first­commissioning-checklist. The first-commissioning-checklist
in the appendix (→ Page 42) of the installation instructions
must be filled out and stored carefully along with the unit's
documentation.

▶ Carry out the initial start-up using the first-commission-

ing-checklist in the appendix.

▶ Fill out and sign the first-commissioning-checklist.

7.2 Checking the type of gas

Make sure that the product is set up correctly by checking
the type of gas. This ensures optimum combustion quality.

▶ Check the type of gas as part of routine product mainten-

ance work when replacing components or carrying out
work on the gas route.

7.3 Checking the factory setting

The product's combustion has been factory tested and is
preset for operation with the gas group indicated on the iden­tification plate.

The product is only authorised to be operated with natural
gas.

▶ Check the information about the type of gas indicated on

the identification plate and compare this with the type of
gas available at the installation location.

Conditions: The product design is not compatible with the local gas
group

▶ Do not start up the product.

Conditions: The product design is compatible with the local gas group

▶ Proceed as described below.

7.4 Checking and treating the heating
water/filling and supplementary water

Caution.
Risk of material damage due to poor-qual-

ity heating water

▶ Ensure that the heating water is of suffi-

cient quality.

▶ Before filling or topping up the installation, check the

quality of the heating water.

Checking the quality of the heating water

▶ Remove a little water from the heating circuit.
▶ Check the appearance of the heating water.
▶ If you ascertain that it contains sedimentary materials,

you must desludge the installation.

▶ Use a magnetic rod to check whether it contains mag-

netite (iron oxide).

▶ If you ascertain that it contains magnetite, clean the in-

stallation and apply suitable corrosion-protection meas­ures, or fit a magnetic filter.

▶ Check the pH value of the removed water at 25 °C.

Start-up 7

0020177746_03 ENERGY Installation and maintenance instructions 17

▶ If the value is below 6.5 or above 8.5, clean the system

and treat the heating water.

▶ Ensure that oxygen cannot get into the heating water.

Checking the filling and supplementary water

▶ Before filling the installation, measure the hardness of the

filling and supplementary water.

Treating the filling and supplementary water

▶ Observe all applicable national regulations and technical

standards when treating the filling and supplementary
water.

Provided the national regulations and technical standards
do not stipulate more stringent requirements, the following
applies:

You must treat the heating water in the following cases:

– If the entire filling and supplementary water quantity dur-

ing the operating life of the system exceeds three times
the nominal volume of the heating installation, or

– If the guideline values listed in the following table are not

met, or

– if the pH value of the heating water is less than 6.5 or

more than 8.5.

Total
heating
output

Water hardness at specific system volume

1)

≤ 20 l/kW

> 20 l/kW
≤ 50 l/kW

> 50 l/kW

kW

ppm

CaCO₃

mol/m³ppm

CaCO₃

mol/m³ppm

CaCO₃

mol/

m³

< 50 < 300 < 3 200 2 2 0.02

> 50
to ≤ 200

200 2 150 1.5 2 0.02

> 200
to ≤ 600

150 1.5 2 0.02 2 0.02

> 600 2 0.02 2 0.02 2 0.02

1) Nominal capacity in litres/heating output; in the case of multi­boiler systems, the smallest single heating output is to be used.

Caution.
The use of unsuitable heating water may

cause aluminium corrosion and a result­ing lack of leak-tightness.

In contrast to steel, grey cast iron or copper,
for example, aluminium reacts with alkaline
heating water (pH value > 8.5) to produce
substantial corrosion.

▶ When using aluminium, make sure that

the pH value of the heating water is
between 6.5 and a maximum of 8.5.

Caution.
Risk of material damage if the heating

water is treated with unsuitable additives.

Unsuitable additives may cause changes in
the components, noises in heating mode and
possibly subsequent damage.

▶ Do not use any unsuitable frost and cor-

rosion protection agents, biocides or seal­ants.

No incompatibility with our products has been detected to
date with proper use of the following additives.

▶ When using additives, follow the manufacturer's instruc-

tions without exception.

We accept no liability for the compatibility of any additive or
its effectiveness in the rest of the heating system.

Additives for cleaning measures (subsequent
flushing required)

– Adey MC3+
– Adey MC5
– Fernox F3
– Sentinel X 300
– Sentinel X 400

Additives intended to remain permanently in the
installation

– Adey MC1+
– Fernox F1
– Fernox F2
– Sentinel X 100
– Sentinel X 200

Additives for frost protection intended to remain
permanently in the installation

– Adey MC ZERO
– Fernox Antifreeze Alphi 11
– Sentinel X 500

▶ If you have used the above-mentioned additives, inform

the end user about the measures that are required.

▶ Inform the end user about the measures required for frost

protection.

7.5 Avoiding danger arising from insufficient
water pressure

The filling pressure must be between 0.10 and 0.15 MPa
(1.0 and 1.5 bar).

Note

If the heating flow temperature is shown in the
display, press and hold the and buttons
at the same time for longer than five seconds, or
temporarily deactivate heating mode in order to
display the pressure.

If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air entering
the heating installation.

If the water pressure falls below 0.05 MPa (0.5 bar), the
value flashes in the display.

If the water pressure falls below 0.03 MPa (0.3 bar), the
product switches off. The display shows 0.0 MPa (0.0 bar).
Fault F22 will be stored in the fault list.

▶ Top up the water in the heating installation to start up the

product again.

7 Start-up

18 Installation and maintenance instructions ENERGY 0020177746_03

◁ The pressure value flashes in the display until a

pressure of 0.05 MPa (0.5 bar) or higher has been
reached.

7.6 Switching on the product

▶ Switch on the product via the main switch installed on-

site.

7.7 Filling and purging the heating installation

Preliminary work

▶ Flush the heating installation through.

1

1

1. Check the silicone hose connection (1) between the
pump's automatic air vent and the hydraulic console.

2. Fill with water until the required filling pressure is
reached.

– Recommended filling pressure: 1 … 1.5 bar

◁ The heating and hot water functions cannot be activ-

ated.

◁ The pressure value flashes in the display until a

pressure of 0.05 MPa (0.5 bar) or higher has been
reached.

◁ An automatic air vent function is activated if the

pressure exceeds 0.05 MPa (0.5 bar) for longer than
15 seconds.

3. Purge each radiator until the water escapes normally,
and then retighten the system's purging valves.

4. Check whether all connections are leak-tight.

Conditions: If the noise persists in the boiler

▶ Purge the product again by activating check programme

(P.07) and then (P.06).
Check programmes – Overview (→ Page 30)

7.8 Filling the condensate siphon

C

2

3

1

A

B

1. Unclip the lower section of the siphon (1) from the up­per section of the siphon (2).

2. Remove the float (3).

3. Fill the lower section of the siphon with water up to 10
mm below the upper edge of the condensate drain pipe­work.

4. Re-insert the float (3).

Note

Check that the float is present in the con­densate siphon.

5. Clip the lower section of the siphon (1) into the upper
section of the siphon (2).

7.9 Filling the hot water circuit

1. Open the water tap to fill the hot water circuit.

2. Close the water tap once the appropriate volume of
water has flowed out.

◁ The hot water circuit is filled.

3. Check all connections and the entire system for leak­tightness.

7.10 Checking and adjusting the gas settings

Only a qualified competent person is authorised to imple­ment the settings on the gas valve assembly.

Each destroyed tamper-proof seal must be replaced.

The CO₂ adjusting screw must be sealed.

Never modify the factory setting of the gas pressure regu­lator of the gas valve assembly.

7.10.1 Checking the gas flow rate

The gas flow rate has been set during production and does
not require adjustment. With the front casing fitted check the
gas flow rate of the boiler as follows:

▶ Start up the product with the check programme P.01.

Start-up 7

0020177746_03 ENERGY Installation and maintenance instructions 19

▶ In addition, ensure that maximum heat can be dissipated

into the heating system by turning up the room thermo­stat.

▶ Wait at least 5 minutes until the boiler has reached its

operating temperature.

▶ Ensure that all other gas appliances in the property are

turned off.

▶ Measure the gas flow rate at the gas meter.
▶ Compare the measured values with the corresponding

values in the table.

Qnw from the data
plate

H gas in m³/h

Nom. +5% −10%

15.3 1.62 1.70 1.46

18.4 1.95 2.05 1.76

24.7 2.61 2.74 2.35

25.7 2.72 2.86 2.45

28.6 3.03 3.18 2.73

30.6 3.24 3.40 2.92

35.7 3.78 3.97 3.40

Conditions: Gas flow rate not in the permissible range

▶ Check all of the piping and ensure that the gas flow rates

are correct.

▶ Only put the product into operation once the gas flow

rates have been corrected.

Conditions: Gas flow rate in the permissible range

▶ End the check programme P.01.
▶ Allow the boiler to cool down by allowing pump overrun to

operate for a minimum of 2 minutes.

▶ Record the boiler maximum gas flow rate onto the

Benchmark gas boiler commissioning checklist.

7.10.2 Checking the gas connection pressure (gas
flow pressure)

1

2

1. Ensure that the gas inlet working pressure can be

obtained with all other gas appliances in the property
working.

2. Close the gas stopcock (1).

3. Undo the sealing screw on the test nipple (2).

4. Connect a manometer to the test nipple (2).

5. Open the gas stopcock (1).

6. Start up the product with check programme P.01 (in-

stallation with eBUS control).

7. In addition, ensure that maximum heat can be dissip-

ated by fully opening one or more hot water taps.

8. With the boiler operating at full load check that the gas

inlet working pressure at the reference test point (2)
complies with the requirements.

Permissible connection pressure

Great Bri­tain

Natural
gas

G20

1.7 … 2 kPa

(17.0
… 20 mbar)

9. Should the pressure recorded at the reference test point
in the boiler be lower than indicated check if there is
any blockage in the pipework or if the pipework is un­dersized.

Conditions: Gas flow pressure not in the permissible range

Caution.
Risk of material damage and operating

faults caused by incorrect gas connec­tion pressure.

If the gas connection pressure lies outside
the permissible range, this can cause oper­ating faults in and damage to the product.

▶ Do not make any adjustments to the

product.

▶ Do not start up the product.

▶ If you cannot correct the failure, notify the gas supply

company and proceed as follows:

▶ End check programme P.01.
▶ Allow the boiler to cool down by allowing pump overrun

to operate for a minimum of two minutes.

▶ Close the gas stopcock.
▶ Remove the pressure gauge and retighten the sealing

screw (2) for the measuring nipple.

▶ Open the gas stopcock (1).
▶ Check the test nipple for gas tightness.
▶ Close the gas stopcock (1).
▶ Install the front casing. (→ Page 10)
▶ Disconnect the product from the electrical installation.
▶ You must not start up the boiler.

Conditions: Gas flow pressure in the permissible range

▶ End the check programme P.01.
▶ Allow the boiler to cool down allowing pump overrun to

operate for a minimum of two minutes.

▶ Close the gas stopcock (1).
▶ Remove the pressure gauge and retighten the sealing

screw (2) for the measuring nipple.

▶ Open the gas stopcock (1).
▶ Check the test nipple for gas tightness.
▶ Install the front casing. (→ Page 10)
▶ Reset boiler controls for normal operation.
▶ Record the appliance gas inlet working pressure (kPa

resp. mbar) in the Benchmark gas boiler commissioning
checklist.

7 Start-up

20 Installation and maintenance instructions ENERGY 0020177746_03

7.10.3 Checking the leak-tightness of the flue gas
installation and flue gas recirculation

1. Check the flue gas installation is intact in accordance

with the latest gas safe technical bulletin and informa­tion supplied in the installation instructions.

2. For extended flue gas installations check for flue gas

recirculation using the air analysis point.

3. Use a flue gas analyser.

4. If you discover CO or CO2in the supply air, search for

the leak in the flue gas installation or for signs of flue
gas recirculation.

5. Eliminate the damage properly.

6. Check again whether the supply air contains any CO or

CO2.

7. If you cannot eliminate the damage, do not start up the

product.

7.10.4 Thoroughly flushing the heating installation
("hot")

1. Operate the appliance until the boiler and the heating

system are up to temperature.

2. Check the heating system for leaks.

3. Connect a hose to the drain valve located at the lowest

position of the heating system.

4. Shut off the boiler, open the drain valve and all purge

valves on the radiators and allow the water to flow out
of the heating system and the boiler quickly and fully.

5. Close the drain valve.

6. Fill and purge the heating installation. (→ Page 18)

7. Re-fill the system until the system design pressure of

0,1 MPa (1,0 bar) is attained.

Note

The actual reading on the digital pressure
gauge should ideally be 0,05 MPa (0,5 bar)
plus an additional pressure corresponding
to the highest point of the system above the
base of the boiler – 10 m head equals an ad­ditional 1 bar reading on the pressure gauge.
The minimum pressure should not be less
than 0,1 MPa (1 bar) in any installation. If
the system is to be treated with an inhibitor it
should be applied at this stage in accordance
with the manufacturer’s instructions. Further
information can be obtained from Sentinel,
Betz Dearborn Ltd., Tel: [phone], or
Fernox, Alpha– Fry technologies. Tel: 0870

8700362.

8. Install the front casing. (→ Page 10)

7.10.5 Checking the CO₂ content

1. Start up the product with the check programme (P.01)

and set the value.
– Setting value for the programme P.01: 100
Check programmes – Overview (→ Page 30)

2. Wait until the value that is read is stable.

– Waiting period for reading a stable value: 5 min

1

3. Unscrew the cover from the flue gas analysis point (1).

4. Measure the CO₂ content at the flue gas analysis point

(1).

5. Compare the measured value with the corresponding
value in the table.

Checking the CO₂ content

Great Britain

front casing on / front casing off

Natural gas

G20

9.2 ±1 %

◁ The value is OK.
▽ The value is not OK; you cannot start up the

product.

▶ Inform Customer Service.

7.11 Checking leak-tightness

▶ Check the gas pipe, the heating circuit and the hot water

circuit for leak-tightness.

▶ Check that the air/flue pipe has been installed correctly.

Conditions: Room-sealed operation

▶ Check whether the vacuum chamber has been closed

tightly.

7.11.1 Checking the heating mode

1. Activate the heating mode on the user interface.

2. Turn all thermostatic radiator valves on the radiators
until they are fully open.

3. Allow the product to operate for at least 15 minutes.

4. Fill and purge the heating installation. (→ Page 18)

5. Activate the display for the current operating status.
(→ Page 15)

Status codes – Overview (→ Page 34)

◁ If the product is working correctly, the display shows

S.04.

7.11.2 Checking the hot water generation

1. Activate the hot water handling mode on the user
interface.

2. Open a hot water valve completely.

3. Activate the display for the current operating status.
(→ Page 15)

Adapting the unit to the heating installation 8

0020177746_03 ENERGY Installation and maintenance instructions 21

Status codes – Overview (→ Page 34)

◁ If the product is working correctly, the display shows

S.14.

8 Adapting the unit to the heating

installation

You can reset/change the system parameters (section "Us­ing diagnostics codes").

Overview of diagnostics codes (→ Page 30)

8.1 Burner anti-cycling time

To prevent frequent switching on and off of the burner and
thus prevent energy losses, an electronic restart lockout
is activated for a specific period each time the burner is
switched off. The burner anti-cycling time is only active for
the heating mode. Hot water handling mode during a burner
anti-cycling time does not affect the time function element.

8.1.1 Setting the maximum burner anti-cycling
time

1. Set the diagnostics code. (→ Page 15)

Overview of diagnostics codes (→ Page 30)

2. If required, adjust the maximum burner anti-cycling time

using the diagnostics code d.02.

8.1.2 Resetting the remaining burner anti-cycling
time

▶

Hold the button down for more than 3 seconds.

◁

is shown in the display.

8.2 Setting the pump output

The product is equipped with a speed-regulated high-effi­ciency pump, which adjusts independently to the hydraulic
conditions of the heating installation.

If you have installed a low loss header in the heating install­ation, you should switch off the speed regulation and set the
pump output to a fixed value.

▶ If required, change the setting of the pump speed, which

depends on the operating mode, under diagnostics code
d.14.

▶ Set the diagnostics code. (→ Page 15)

Overview of diagnostics codes (→ Page 30)

Flow rate-pressure curves for 25 kW
(pressure measured downstream of the valves)

A

B

0

10

20

30

40

50

60

0 200 400 600 800 1000 1200

1

2

3

4

1 Maximum speed (by-

pass closed)

2 Maximum speed (de-

fault setting for the by­pass)

3 Minimum speed (default

setting for the bypass)

4 Flow rate at maximum

output (ΔT = 20K)

A Throughput in circuit

(l/h)

B Available pressure

(kPa)

Flow rate-pressure curves for 30 kW
(pressure measured downstream of the valves)

A

B

0

10

20

30

40

50

60

0 200 400 600 800 1000 1200

70

1

2

3

4

1 Maximum speed (by-

pass closed)

2 Maximum speed (de-

fault setting for the by­pass)

3 Minimum speed (default

setting for the bypass)

4 Flow rate at maximum

output (ΔT = 20K)

A Throughput in circuit

(l/h)

B Available pressure

(kPa)

Flow rate-pressure curves for 35 kW
(pressure measured downstream of the valves)

A

B

0

10

20

30

40

50

60

0 200 400 600 800 1000 1200

70

1

2

3

4

1 Maximum speed (by-

pass closed)

2 Maximum speed (de-

fault setting for the by­pass)

3 Minimum speed (default

setting for the bypass)

9 Handing the product over to the end user

22 Installation and maintenance instructions ENERGY 0020177746_03

4 Flow rate at maximum

output (ΔT = 20K)

A Throughput in circuit

(l/h)

B Available pressure

(kPa)

8.3 Setting the bypass valve

Caution.
Risk of material damage caused by incor-

rect setting of the high-efficiency pump

If the pressure at the bypass valve is in­creased (by turning it clockwise) and the
pump output is set to less than 100%, the
product may not operate correctly.

▶ In this case, set the pump output to

5 = 100% using diagnostics parameter

d.14.

Conditions: d.14 is set to 0 = auto

▶ Do not change the factory settings.

Conditions: d.14 is set to 1 - 5

▶ Remove the front casing. (→ Page 10)

1

▶ Regulate the pressure using the adjusting screw (1).

Position of the adjusting
screw

Notes/application

Right-hand stop (screwed
all the way in)

If the radiators do not heat
up sufficiently at the default
setting. In this case, you must
set the pump to the maximum
speed.

Mid-position (six anti­clockwise rotations)

Default setting

Five further anti-clockwise
rotations starting from the
mid-position

If noises are produced in the
radiators or radiator valves.

▶ Install the front casing. (→ Page 10)

8.4 Setting the hot water temperature

Danger!
Risk of death from legionella.

Legionella multiply at temperatures below
60 °C.

▶ Ensure that the end user is familiar with

all of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.

▶ Set the hot water temperature.

Conditions: Water hardness: > 3.57 mol/m³

– Hot water temperature: ≤ 50 ℃

9 Handing the product over to the end

user

▶ When you have finished the installation, attach the sticker

supplied (in the end user's language) to the product
cover.

▶ Explain to the end user how the safety devices work and

where they are located.

▶ Inform the end user how to handle the product.
▶ In particular, draw attention to the safety information

which the end user must follow.

▶ Inform the end user that they must have the product

maintained in accordance with the specified intervals.

▶ Instruct the end user about measures taken for routing

the combustion air supply and flue system.

10 Inspection and maintenance

10.1 Using original seals

If you replace components, use only the enclosed original
seals; additional sealing materials are not required.

10.2 Observing inspection and maintenance
intervals

▶ Adhere to the minimum inspection and maintenance in-

tervals. The inspection may require maintenance to be
carried out earlier, depending on the results.

Inspection and maintenance work – Overview
(→ Page 39)

Inspection and maintenance 10

0020177746_03 ENERGY Installation and maintenance instructions 23

10.3 Procuring spare parts

The original components of the product were also certified
by the manufacturer as part of the declaration of conformity.
If you use other, non-certified or unauthorised parts during
maintenance or repair work, this may void the conformity of
the product and it will therefore no longer comply with the
applicable standards.

We strongly recommend that you use original spare parts
from the manufacturer as this guarantees fault-free and safe
operation of the product. To receive information about the
available original spare parts, contact the contact address
provided on the reverse of these instructions.

▶ If you require spare parts for maintenance or repair

work, use only the spare parts that are permitted for the
product.

10.4 Checking the CO₂ content

1. Start up the product with the check programme (P.01)
and set the value.

– Setting value for the programme P.01: 100
Check programmes – Overview (→ Page 30)

2. Wait until the value that is read is stable.
– Waiting period for reading a stable value: 5 min

1

3. Unscrew the cover from the flue gas analysis point (1).

4. Measure the CO₂ content at the flue gas analysis point
(1).

5. Compare the measured value with the corresponding
value in the table.

Checking the CO₂ content

Great Britain

front casing on / front casing off

Natural gas

G20

9.2 ±1 %

◁ The value is OK.
▽ The value is not OK; you cannot start up the

product.

▶ Set the CO₂ content. (→ Page 23)

10.5 Setting the CO₂ content

Conditions: The CO₂ content must be adjusted

1

A

B

▶ Remove the sticker.
▶ Turn the screw (1) to set the CO₂ content (value with

front casing removed).

◁ To increase the CO₂ content: Turn anti-clockwise
◁ To decrease the CO₂ content: Turn clockwise

▶ Only carry out the adjustment in increments of 1/8 turn

and wait approximately 1 minute after each adjustment
until the value has stabilised.

▶ Compare the measured value with the corresponding

value in the table.

Setting the CO₂ value

Great Britain

front casing on
/ front casing
off

Natural gas

G20

CO₂ at full load

9.2 ±0.2 %

Set for Wobbe
index W₀

14.09 kW⋅h/m³

O₂ at full load

4.5 ±1.8 vol. %

CO at full load

≤ 250 ppm

CO/CO₂

≤ 0.0027

▽ If the setting is not in the specified adjustment range,

you must not start up the product.

▶ Inform Customer Service.

▶ Check whether the air-quality requirements with regard

to carbon monoxide are fulfilled.

▶ Fit the front panel.

10 Inspection and maintenance

24 Installation and maintenance instructions ENERGY 0020177746_03

10.6 Removing the gas-air mixture unit

Note

The gas-air mixture unit consists of three main
components:

– Fan

– Gas valve,

– Burner cover

1. Switch off the product via the main switch.

2. Close the gas isolator cock.

3. Remove the front casing. (→ Page 10)

C

A

B

1

D

2

4. Remove the screw (1).

5. Push the clip upwards.

6. Remove the flue gas pipe (2).

3

4

5

A

B

7. Remove the air intake pipe (3).

8. Remove the plugs from the gas valve (4) and from the
fan (5).

A

C

D

B

6

9. Remove the gas-air mixture unit (6).

7

7

8

10. Remove the burner seals (7) and the burner (8).

11. Check the burner and the heat exchanger for damage
and dirt.

12. If necessary, clean or replace the components accord­ing to the following sections.

13. Install the two new burner seals.

10.7 Cleaning the heat exchanger

1

1. Protect the folded down electronics box against sprayed

water.

2. Clean the ribs of the heat exchanger (1) with water.

◁ The water runs out into the condensate tray.

Inspection and maintenance 10

0020177746_03 ENERGY Installation and maintenance instructions 25

10.8 Checking the burner

1. Search the surface of the burner for possible damage. If
you see any damage, replace the burner.

2. Install the two new burner seals.

10.9 Checking the ignition electrode

1

2

3 4 5

1. Disconnect the connection (2) and the earthing cable
(1).

2. Remove the fixing screws (3).

3. Carefully remove the electrode from the combustion
chamber.

4. Check that the electrode ends (4) are undamaged.

5. Check the electrode distance.
– Clearance for the ignition electrodes: 3.5 … 4.5 mm

6. Make sure that the seal (5) is free from damage.

▽ If necessary, replace the seal.

10.10 Cleaning the condensate siphon

C

2

3

1

A

B

1. Unclip the lower section of the siphon (1) from the up­per section of the siphon (2).

2. Remove the float (3).

3. Flush out the float and lower section of the siphon with
water.

4. Fill the lower section of the siphon with water up to 10
mm below the upper edge of the condensate drain pipe­work.

5. Reinsert the float (3).

Note

Check whether the float is present in the
condensate siphon.

6. Clip the lower section of the siphon (1) into the upper
section of the siphon (2).

10.11 Cleaning the filter in the cold water inlet

1. Close the main cold water supply line.

2. Drain the product on the hot water side.

3. Remove the connection piece from the connection for
the product's cold water supply.

4. Clean the filter in the cold water inlet without removing
it.

10.12 Cleaning the heating filter

2

1

1. Remove the temperature sensor (1).

2. Remove the upper clip (2).

4

3

5

3. Remove the lower clip (3).

4. Remove the flow pipe (4).

5. Remove the heating filter (5) and clean it.

6. Reinstall the components in the reverse order.

11 Troubleshooting

26 Installation and maintenance instructions ENERGY 0020177746_03

10.13 Installing the gas-air mixture unit

1. Install the burner.

2. Install two new burner seals in the burner hood.

3. Install the gas-air mixture unit.

4. Tighten the screws on the gas-air mixture unit.

– Ideally to 7 Nm if a torque spanner is available.

5. Install the flue pipe.

6. Install the air intake pipe.

10.14 Draining the product

1. Close the service valves of the product.

2. Start check programme P.05 (→ Page 16).
Check programmes – Overview (→ Page 30)

3. Open the drain cock.

10.15 Checking the admission pressure of the

expansion vessel

1. Measure the pre-charge pressure of the expansion ves­sel at the vessel valve.

Conditions: Pre-charge pressure < 0.075 MPa (0.75 bar)

▶ Top up the expansion vessel in accordance with the

static height of the heating installation, ideally with ni­trogen, otherwise with air. Ensure that the drain valve is
open when topping up.

2. If water escapes from the expansion vessel's valve, you
must replace the expansion vessel (→ Page 28).

3. Fill and purge the heating installation. (→ Page 18)

10.16 Completing inspection and maintenance

work

1. Check the CO₂ content.

10.17 Checking the product for leak-tightness

▶ Check that the product is leak-tight. (→ Page 20)

11 Troubleshooting

11.1 Rectifying faults

▶ If fault codes (F.XX) appear, refer to the table in the ap-

pendix or use the check programme(s).
Overview of fault codes (→ Page 35)
Check programmes – Overview (→ Page 30)

If several fault codes are generated at the same time, these
are displayed alternately followed by the time at which the
respective fault occurred.

▶

Hold the button down for more than 3 seconds.

▶ If you are unable to clear the fault code and it reappears

despite several fault clearance attempts, contact cus­tomer service.

11.2 Calling up the fault memory

The last 10 fault codes are stored in the fault memory (to­gether with the time at which the respective fault occurred
and, after 24 hours, with the number of days).

▶

Hold the button down for more than 7 seconds.
Overview of fault codes (→ Page 35)

▶

Press the button to exit this menu.

11.3 Deleting the fault memory

1. Delete the fault memory using the diagnostics code
d.94.

2. Set the diagnostics code. (→ Page 15)
Overview of diagnostics codes (→ Page 30)

11.4 Resetting parameters to factory settings

1. Reset all parameters to the factory settings using the
diagnostics code d.96.

2. Set the diagnostics code. (→ Page 15)
Overview of diagnostics codes (→ Page 30)

11.5 Preparing the repair work

1. Switch off the product.

2. Disconnect the product from the electrical installation.

3. Remove the front casing.

4. Close the gas stopcock.

5. Close the service valves in the heating flow and in the
heating return.

6. Close the service valve in the cold water pipe.

7. Drain the product if you want to replace water-bearing
components of the product.

8. Ensure that water does not drip on live components
(e.g. the electronics box).

9. Use only new seals and O-rings. Do not use any addi­tional sealing materials.

11.6 Replacing defective components

11.6.1 Replacing the burner

1. Remove the gas-air mixture unit. (→ Page 24)

2. Remove the two burner seals.

3. Remove the burner.

4. Insert the new burner.

5. Insert two new burner seals in the burner cover.

6. Install the gas-air mixture unit. (→ Page 26)

11.6.2 Replacing the gas-air mixture unit

1. Remove the gas-air mixture unit. (→ Page 24)

2. Install the new gas-air mixture (→ Page 26).

11.6.3 Replacing the heat exchanger

1. Remove the front casing. (→ Page 10)

2. Remove the gas-air mixture unit. (→ Page 24)

Troubleshooting 11

0020177746_03 ENERGY Installation and maintenance instructions 27

1

A

B

3. Remove the gas pipe (1).

1

2

3

2 4

A

B

4. Remove the temperature sensor (3).

5. Remove the upper clip (1).

6. Remove the lower clip (4).

7. Remove the supply pipe (2).

2

2 3

B

1

A

8. Remove the upper clip (1).

9. Remove the lower clip (3).

10. Remove the return pipe (2).

1

A

2

11. Remove the clip underneath the condensate tray (1).

12. Undo the four screws (2).

2

1

B

C

A

13. Remove the ignition electrode (1).

14. Lift the heat exchanger up slightly and remove it to­gether with the condensate tray.

15. Remove the ignition transformer (2).

16. Install the new heat exchanger in reverse order.

11.6.4 Replacing the pump head

1

2

1. Disconnect the pump cable from the electronics box.

2. Undo the four bolts (1).

3. Remove the pump head (2).

4. Replace the O-ring.

5. Use four screws to secure the new pump head.

6. Connect the pump cable to the electronics box.

11 Troubleshooting

28 Installation and maintenance instructions ENERGY 0020177746_03

11.6.5 Replacing the expansion vessel

B

C

1

2

3

A

D

1. Undo the nut (3).

2. Remove both screws on the support plate (1).

3. Remove the support plate.

4. Pull out the expansion vessel (2) towards the front.

5. Insert the new expansion vessel into the product.

6. Screw the new expansion vessel to the water connec­tion. To do this, use a new seal.

7. Attach the support plate using both screws.

8. Fill and purge the product (→ Page 18) and, if required,
the heating installation.

11.6.6 Replacing the main PCB

C

C

D

B

A

A

1. Open the electronics box.

2. Pull all of the plugs out from the PCB.

3. Undo the clips on the PCB.

4. Remove the PCB.

5. Install the new PCB in such a way that it clicks into the
groove at the bottom and into the clip at the top.

6. Plug in the PCB plugs.

7. Close the electronics box.

11.6.7 Replacing the PCB for the user interface

B

C

C

D

A

A

1. Open the electronics box.

2. Pull the plug out of the PCB.

3. Undo the clips on the PCB.

4. Remove the PCB.

5. Install the new PCB in such a way that it clicks into the
groove at the bottom and into the clip at the top.

6. Plug in the PCB plug.

7. Close the electronics box.

11.6.8 Replacing the expansion relief valve

1

2

1. Remove the clip (2).

2. Remove the expansion relief valve.

3. Fit the new expansion relief valve with a new O-ring.

4. Reattach the clip (2).

Decommissioning the product 12

0020177746_03 ENERGY Installation and maintenance instructions 29

11.6.9 Replacing the volume flow sensor

1

B

A

1. Pull out the plug.

2. Remove the volume flow sensor (1).

3. Install the new volume flow sensor.

4. Plug in the plug.

11.6.10 Replace the pressure sensor

1

2

1. Pull out the plug.

2. Remove the clip (1).

3. Remove the pressure sensor (2).

4. Install the new pressure sensor.

5. Reattach the clip (1).

11.7 Checking the product for leak-tightness

▶ Check that the product is leak-tight. (→ Page 20)

12 Decommissioning the product

▶ Switch off the product.
▶ Disconnect the product from the power mains.
▶ Close the gas isolator cock.
▶ Close the cold water stop cock.

13 Customer service

For contact details for our customer service department, you
can write to the address that is provided on the back page,
or you can visit www.glow-worm.co.uk.

Appendix

30 Installation and maintenance instructions ENERGY 0020177746_03

Appendix

A Check programmes – Overview

Note

Since the programme table is used for various products, some programmes may not be visible for the product in
question.

Display Meaning

P.01 Burner operation on adjustable heat input:

The product operates after ignition with the heat input set between "0" (0% = Pmin) and "100" (100% = Pmax).

The function is active for 15 minutes.

P.02 Burner operation at ignition load:

After ignition, the product works at ignition load.

The function is active for 15 minutes.

P.03 The product runs in heating mode with the maximum heat input set using diagnostics code d.00.

P.04 Maximum output function:

If there is a hot water request, the product runs in hot water handling mode and at maximum heat load.

If there is no hot water request, the product runs with the heating partial load that is set via diagnostics code
d.00 and in heating mode.

The function is active for 15 minutes.

P.05 Filling the product:

The diverter valve moves to the mid-position. The burner and pump switch off (to fill or drain the product).

If the pressure is lower than 0.03 MPa (0.3 bar) and then is above 0.05 MPa (0.5 bar) for longer than 15
seconds, the automatic purging function is activated.

The function is active for 15 minutes.

P.06 Purging the heating circuit:

The diverter valve is moved to the heating position.

The function is activated in the heating circuit for 15 minutes.

The pump runs and stops at regular intervals.

If required, this function can be manually switched off.

P.07 Purging the hot water circuit:

The function is activated in the small hot water circuit for 4 minutes and then in the heating circuit for 1 minute.

The pump runs and stops at regular intervals.

If required, this function can be manually switched off.

Automatic air vent
function

Purging the product:

If the pressure is lower than 0.03 MPa (0.3 bar) and then is above 0.05 MPa (0.5 bar) for longer than 15
seconds, the automatic purging function is activated.

The function is activated in the small hot water circuit for 4 minutes and then in the heating circuit for 1 minute.

This function cannot be manually switched off.

B Overview of diagnostics codes

Note

Since the code table is used for various products, some codes may not be visible for the product in question.

Dia­gnostics
code

Parameter

Values

Unit Increment, select, explanation

Default set­ting

Own setting

Min. Max.

d.00 Heating maximum output – – kW The maximum heating output

varies depending on the product.
→ Section "Technical data"

Automatic: Unit automatically
adjusts the maximum output to
the current system demand

→ Section

"Technical

data"

Adjustable

d.01 Pump overrun in heating

mode

1 60 min 1 5 Adjustable

d.02 Maximum burner anti-

cycling time in heating
mode

2 60 min 1 20 Adjustable

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 31

Dia­gnostics
code

Parameter

Values

Unit Increment, select, explanation

Default set­ting

Own setting

Min. Max.

d.04 Water temperature in the

cylinder

Current value ℃ – – Not

adjustable

d.05 Determined heating flow

set target temperature

Current value

℃ – – Not

adjustable

d.06 Hot water set target tem-

perature

Current value ℃ (Combination unit only) – Not

adjustable

d.07 Set target temperature

for the domestic hot wa­ter cylinder

Current value ℃ – – Not

adjustable

d.08 Status of the 230 V ther-

mostat

Current value – 0 = Room thermostat open (no

heat requirement)

1 = Room thermostat closed
(heat requirement)

– Not

adjustable

d.09 Heating flow set target

temperature that is set
on the eBUS room ther­mostat

Current value ℃ – – Not

adjustable

d.10 Status of the internal

pump in the heating cir­cuit

Current value – off / on – Not

adjustable

d.11 Status of the heating

circuit's shunt pump

Current value – off / on – Not

adjustable

d.13 Status of the hot water

circuit's circulation pump

Current value – off / on – Not

adjustable

d.14 Operating mode of the

modulating pump

0 5 – 0 = variable rotational speed

(auto)

1; 2; 3; 4; 5 = Fixed rotational
speeds → Section "Setting the
pump output"

0 Adjustable

d.15 Pump speed Current value % – – Not

adjustable

d.16 Status of the 24 V room

thermostat

Current value – off = Heating off

on = Heating on

– Not

adjustable

d.17 Heating control – – – off = Flow temperature

on = Return temperature (ad­justment for underfloor heating.
If you have activated the return
temperature control, the auto­matic heating output determina­tion function is not active.)

0 Adjustable

d.18 Pump overrun operating

mode

1 3 – 1 = Continuous (pump runs per-

manently)

3 = Eco (intermittent pump mode
– for the dissipation of the resid­ual heat after hot water gener­ation at an extremely low heat
demand)

1 Adjustable

d.19 Pump operating mode, 2

stage pump

0 3 – 0 = Burner mode stage 2, pump

flow/overrun stage 1

1 = Heating mode and pump
flow/overrun stage 1, hot water
handling mode stage 2

2 = Automatic heating mode,
pump flow/overrun stage 1, hot
water handling mode stage 2

3 = Stage 2

3 Adjustable

d.20 Maximum hot water set

target temperature

50 60 ℃ 1 60 Adjustable

d.21 Status of the warm start

for hot water

Current value – off = Function deactivated

on = Function activated and
available

– Not

adjustable

Appendix

32 Installation and maintenance instructions ENERGY 0020177746_03

Dia­gnostics
code

Parameter

Values

Unit Increment, select, explanation

Default set­ting

Own setting

Min. Max.

d.22 Status of the hot water

request

Current value – off = No current requirement

on = Current requirement

– Not

adjustable

d.23 Status of the heating

demand

Current value – off = Heating off (Summer mode)

on = Heating on

– Not

adjustable

d.24 Status of the pressure

monitor

0 1 – off = Not switched

on = Switched

– Not

adjustable

d.25 Status of the requirement

to reheat the cylinder or
for the hot water warm
start from the eBUS ther­mostat

Current value – off = Function deactivated

on = Function activated

– Not

adjustable

d.27 Function of relay 1

(multi-functional module)

1 10 – 1 = Circulation pump

2 = External pump

3 = Cylinder charging pump

4 = Extractor hood

5 = External solenoid valve

6 = Fault display

7 = Solar pump (omitted)

8 = eBUS remote control

9 = Legionella protection pump

10 = Solar valve

1 Adjustable

d.28 Function of relay 2

(multi-functional module)

1 10 – 1 = Circulation pump

2 = External pump

3 = Cylinder charging pump

4 = Extractor hood

5 = External solenoid valve

6 = Fault display

7 = Solar pump (omitted)

8 = eBUS remote control

9 = Legionella protection pump

10 = Solar valve

2 Adjustable

d.31 Automatic filling device 0 2 – 0 = Manual

1 = Semi-automatic

2 = Automatic

0 Adjustable

d.33 Fan speed target value Current value rpm Fan speed = Display value x 100 – Not

adjustable

d.34 Value for the fan speed Current value rpm Fan speed = Display value x 100 – Not

adjustable

d.35 Position of the diverter

valve

Current value – 0 = Heating

40 = Mid-position (parallel opera­tion)

100 = Domestic hot water

– Not

adjustable

d.36 Value for the hot water

flow

Current value l/min – – Not

adjustable

d.39 Water temperature in the

solar circuit

Current value ℃ – – Not

adjustable

d.40 Heating flow temperature Current value ℃ – – Not

adjustable

d.41 Heating return temperat-

ure

Current value ℃ – – Not

adjustable

d.43 Heating curve 0.2 4 – 0.1 1.2 Adjustable

d.45 Value for the base point

of the heating curve

15 30 – 1 20 Adjustable

d.47 Outside temperature Current value ℃ – – Not

adjustable

d.50 Correction of the min-

imum fan speed

0 3000 rpm 1

Fan speed = Display value x 10

600 Adjustable

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 33

Dia­gnostics
code

Parameter

Values

Unit Increment, select, explanation

Default set­ting

Own setting

Min. Max.

d.51 Correction of the max-

imum fan speed

-2500 0 rpm 1

Fan speed = Display value x 10

-1000 Adjustable

d.58 Solar circuit reheating 0 3 – 0 = Boiler's Legionella protection

function deactivated

3 = Hot water activated (min.
target value 60 °C)

0 Adjustable

d.60 Number of blocks by the

temperature limiter

Current value – – – Not

adjustable

d.61 Number of unsuccessful

ignitions

Current value – – – Not

adjustable

d.62 Night set-back 0 30 – 1 0 Adjustable

d.64 Average burner ignition

time

Current value s – – Not

adjustable

d.65 Maximum burner ignition

time

Current value s – – Not

adjustable

d.66 Activation of the warm

start function for hot wa­ter

– – – off = Function deactivated

on = Function activated

1 Adjustable

d.67 Remaining burner anti-

cycling time (setting un­der d.02)

Current value min – – Not

adjustable

d.68 Number of unsuccessful

ignitions at 1st attempt

Current value – – – Not

adjustable

d.69 Number of unsuccessful

ignitions at 2nd attempt

Current value – – – Not

adjustable

d.70 Operation of the diverter

valve

0 2 – 0 = Normal operating mode

(DHW and heating mode)

1 = Mid-position (parallel opera­tion)

2 = Permanent heating mode
position

0 Adjustable

d.71 Maximum heating flow

set target temperature

45 80 ℃ 1 → Section

"Technical

data"

Adjustable

d.73 Correction of the hot wa-

ter warm start temperat­ure

-15 5 K 1 0 Adjustable

d.75 Maximum cylinder re-

heating time

20 90 min 1 45 Adjustable

d.77 Max. cylinder reheating – – kW 1

→ Section "Technical data"

– Adjustable

d.80 Running time in heating

mode

Current value h Running time = Display value x

100

– Not

adjustable

d.81 Running time in hot wa-

ter handling mode

Current value h Running time = Display value x

100

– Not

adjustable

d.82 Number of burner igni-

tions in heating mode

Current value – Number of ignitions = Display

value x 100

– Not

adjustable

d.83 Number of burner igni-

tions in hot water hand­ling mode

Current value – Number of ignitions = Display

value x 100

– Not

adjustable

d.84 Maintenance in 0 3000 h Number of hours = Display value

x 10

300 Not

adjustable

d.85 Increase in the min. out-

put (heating and hot wa­ter handling mode)

– – kW 1 – Adjustable

d.88 Flow rate limit value

for ignition in hot water
handling mode

0 1 – 0 = 1.7 l/min (no delay)

1 = 3.7 l/min (2 s delay)

0 Adjustable

d.90 Status of the eBUS room

thermostat

Current value – off = Not connected

on = Connected

– Not

adjustable

Appendix

34 Installation and maintenance instructions ENERGY 0020177746_03

Dia­gnostics
code

Parameter

Values

Unit Increment, select, explanation

Default set­ting

Own setting

Min. Max.

d.91 Status DCF77 Current value – – – Not

adjustable

d.93 Setting the product code 0 99 – 1

The Device Specific Number
(DSN) can be found on the iden­tification plate.

– Adjustable

d.94 Delete fault list 0 1 – off = No

on = Yes

– Adjustable

d.95 Software versions – – – 1 = Main PCB

2 = Interface PCB

– Adjustable

d.96 Default setting (reset) – – – 0 = No

1 = Yes

– Adjustable

C Status codes – Overview

Note

Since the code table is used for various products, some codes may not be visible for the product in question.

Status code Meaning

Displays in heating mode

S.0 Heating mode: No requirement

S.01 Heating mode: Advance fan operation

S.02 Heating mode: Pump pre-run

S.03 Heating mode: Burner ignition

S.04 Heating mode: Burner on

S.05 Heating mode: Pump/fan overrun

S.06 Heating mode: Fan overrun

S.07 Heating mode: Pump overrun

S.08 Heating mode: Temporary shutdown after heating procedure

Displays in hot water handling mode

S.10 Hot water handling mode: Requirement

S.11 Hot water handling mode: Advance fan operation

S.13 Hot water handling mode: Burner ignition

S.14 DHW mode: Burner on

S.15 DHW mode: Pump/fan overrun

S.16 DHW mode: Fan overrun

S.17 DHW mode: Pump overrun

Display in Comfort mode with warm start or hot water handling mode with cylinder

S.20 Hot water handling mode: Requirement

S.21 Hot water handling mode: Advance fan operation

S.22 Hot water handling mode: Pump pre-run

S.23 Hot water handling mode: Burner ignition

S.24 DHW mode: Burner on

S.25 DHW mode: Pump/fan overrun

S.26 DHW mode: Fan overrun

S.27 DHW mode: Pump overrun

S.28 Hot water handling mode: Temporary shutdown of the burner

Other displays

S.30 Room thermostat is blocking heating mode.

S.31 No heating demand: Summer mode, eBUS controller, waiting period

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 35

Status code Meaning

S.32 Fan waiting time: Fan speed outside of the tolerance values

S.33 Forced fan operation until the pressure monitor is switched

S.34 Frost protection active

S.39 Underfloor heating contact open

S.41 Water pressure too high

S.42 Flue non-return flap closed

S.46 Frost protection mode (Comfort): Minimum load

S.53 Product in waiting period/operation block function due to low water pressure (flow/return spread too large)

S.54 Waiting period: Low water pressure in the circuit (flow/return spread too large)

S.76 Maintenance message: Check the water pressure

S.88 Product purging active

S.91 Maintenance: Demo mode

S.96 Automatic test programme: Return temperature sensor, heating demands blocked.

S.97 Automatic test programme: Water pressure sensor, heating demands blocked.

S.98 Automatic test programme: Return temperature sensor, heating demands blocked.

S.99 Internal automatic test programmes

S.108 Purging the combustion chamber, fan in operation

S.109 Product's standby mode activated

D Overview of fault codes

Note

Since the code table is used for various products, some codes may not be visible for the product in question.

Fault code Meaning Possible cause

F.00 Fault: Flow temperature sensor NTC plug not plugged in or has come loose, multiple plug on the PCB not

plugged in correctly, interruption in cable harness, NTC sensor defective

F.01 Fault: Return temperature sensor NTC plug not plugged in or has come loose, multiple plug on the PCB not

plugged in correctly, interruption in cable harness, NTC sensor defective

F.10 Short circuit: Flow temperature sensor NTC sensor defective, short circuit in the cable harness, cable/casing

F.11 Short circuit: Return temperature sensor NTC sensor defective, short circuit in the cable harness, cable/casing

F.12 and

F.91

Short circuit: Cylinder temperature
sensor

NTC sensor defective, short circuit in the cable harness, cable/casing

F.13 Short circuit: Domestic hot water cylinder

temperature sensor

NTC sensor defective, short circuit in the cable harness, cable/casing

F.20 Safety switch-off: Overheating temperat-

ure reached

Incorrect earth connection between cable harness and product, flow or return
NTC defective (loose connection), stray spark via ignition cable, ignition plug
or ignition electrode

F.22 Safety switch-off: Low water pressure in

the boiler

No or insufficient water in the product, water pressure sensor de­fective, cable to the pump or to the water pressure sensor loose/not
connected/defective

F.23 Safety switch-off: Temperature difference

too great (NTC1/NTC2)

Pump blocked, insufficient pump output, air in product, flow and return NTC
sensors connected the wrong way round

F.24 Safety switch-off: Temperature rise too

fast

Pump blocked, insufficient pump output, air in product, system pressure too
low, non-return valve blocked/incorrectly installed

F.25 Safety switch-off: Flue gas temperature

too high

Break in plug connection for optional flue gas safety cut-out (STB), break in
cable harness

F.27 Safety switch-off: Fault in flame detection Moisture on the electronics, electronics (flame monitor) defective, gas solen-

oid valve leaking

Appendix

36 Installation and maintenance instructions ENERGY 0020177746_03

Fault code Meaning Possible cause

F.28 Fault: Ignition unsuccessful when startingupGas meter defective or gas pressure monitor has triggered, air in gas, gas

flow pressure too low, thermal isolator device (TAE) has triggered, incorrect
gas restrictor, incorrect spare gas valve, fault on the gas valve, multiple plug
on PCB incorrectly plugged in, break in cable harness, ignition system (ig­nition transformer, ignition cable, ignition plug, ignition electrode) defective,
ionisation current interrupted (cable, electrode), incorrect earthing of product,
electronics defective

F.29 Fault: Flame loss Gas supply temporarily stopped, flue gas recirculation, incorrect earthing of

product, ignition transformer has spark failure

F.32 Fan frost protection function active: Fan

speed outside the tolerance values

Plug on fan not correctly plugged in, multiple plug on PCB not correctly
plugged in, break in cable harness, fan blocked, Hall sensor defective, elec­tronics defective

F.49 eBUS fault: Voltage too low Short circuit on eBUS, eBUS overload or two power supplies with different

polarities on the eBUS

F.61 Fault: Gas valve control system Short circuit/short to earth in cable harness for the gas valve, gas valve

defective (coils shorted to earth), electronics defective

F.62 Fault: Gas valve switch-off control Delayed switch-off of gas valve, delayed extinguishing of flame signal, gas

valve leaking, electronics defective

F.63 Fault: EEPROM Electronics defective

F.64 Fault: Electronics/sensor/analogue-to-

digital converter

Flow or return NTC short circuited, electronics defective

F.65 Fault: Electronics temperature too high Electronics overheating due to external influences, electronics defective

F.67 Value sent back by ASIC is incorrect

(flame signal)

Implausible flame signal, electronics defective

F.68 Fault: Unstable flame (analogue input) Air in gas, gas flow pressure too low, incorrect air ratio, incorrect gas re-

strictor, ionisation flow interruption (cable, electrode)

F.70 Invalid product code (DSN) Display and PCB replaced at same time and Device Specific Number not

reset, wrong or missing output range coding resistance

F.71 Fault: Flow/return temperature sensor Flow temperature sensor signalling constant value: Flow temperature sensor

incorrectly positioned on supply pipe, flow temperature sensor defective

F.72 Fault: Deviation in the water pressure

sensor/return temperature sensor

Flow/return NTC temperature difference too great → flow and/or return tem­perature sensor defective

F.73 Fault: Water pressure sensor not con-

nected or has short-circuited

Interruption/short circuit of water pressure sensor, interruption/short circuit
to GND in supply line to water pressure sensor or water pressure sensor
defective

F.74 Fault: Electrical problem in the water

pressure sensor

Line to water pressure sensor has a short circuit to 5 V/24 V or internal fault
in the water pressure sensor

F.75 Fault: Pressure sensor Pressure switch defective

F.76 The safety cut-out in the primary heat

exchanger is defective

Safety cut-out feedback does not match the gas valve feedback

F.77 Fault: Condensate or smoke No response, flue non-return flap defective

F.78 Interruption to DHW outlet sensor at

external controller

UK link box is connected, but hot water NTC not bridged

F.83 Fault: Dry fire When the burner starts, the temperature change registered at the flow or

return temperature sensor is non-existent or too small: Insufficient water
in the product, the flow or return temperature sensor is not in the correct
position on the pipe

F.84 Fault: Flow/return temperature sensor Values not consistent, difference < -6 K

Flow and return temperature sensors signalling implausible values: Flow and
return temperature sensors have been inverted, flow and return temperature
sensors have not been correctly installed

F.85 Fault: Temperature sensor The flow and/or return temperature sensors have been installed on the same

pipe/incorrect pipe

Temperature sensor not connected or is connected incorrectly

F.86 Fault: Underfloor heating contact Underfloor heating contact open, sensor disconnected or defective

F.87 Fault: Electrodes Electrodes not connected or they are connected incorrectly, short circuit in

the cable harness

F.88 Fault: Gas valve Gas valve not connected or it is connected incorrectly, short circuit in the

cable harness

F.89 Fault: Pump Pump not connected or it is connected incorrectly, incorrect pump connec-

ted, short circuit in the cable harness

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 37

Fault code Meaning Possible cause

Connection No communication between the PCB

and the user interface

Electronics defective

E Wiring diagram: Combi boiler

X2

X14

X21

L

N

19

10

20

2

6

3

11

13

14

18

7

17

8

X51

X51

X20

16

1
9

3

15

4

5

10

11

6

13

X51 X35

X20

X40 X51

X30

X2

X21

X41

X22

X14

L

N

–

+

24V=

RT BUS

Burner

off

RT

230Vac

X1

FUS

X106

X32

X90

X12

X35

X1

L

N

RT 230Vac

X35

4

1

3
2

eBUS

RT 24V

Burner off

X106

1

3

4

1

3

3

1

2

M

1

3

4

6

1

2

3

M

5

4

2

1

2

1

2

1

N

L

L

24V

230V~

24V

230V~

2

7

8

9

10

12

11

1

4

3

5

6

14

13

1 Main PCB

2 Interface PCB

3 Timer

4 Temperature sensor on the heating flow

5 Temperature sensor on the heating return

6 Fan

7 Gas valve assembly

8 3-port diverter valve

9 Pressure sensor

10 Flow rate sensor

11 External ignition transformer

12 Heating pump

13 Ionisation and ignition electrode

14 Main power supply and connection for 230 V control

Appendix

38 Installation and maintenance instructions ENERGY 0020177746_03

F Wiring diagram: Combi boiler (35 kW)

X20

X40 X51

X30

X2

X21

X41

X22

X14

L

N

–

+

24V=

RT BUS

Burner

off

RT

230Vac

X1

FUS

X106

X32

X90

X12

X35

X2

X14

L

N

19

10

20

2

6

3

11

13

14

18

7

17

8

X12

L

N

X51

X51

X20

16

1
9

3

15

4

5

10

11

6

13

X51

X1

X21

L

N

RT 230Vac

4
3

1

2

eBUS

RT 24V

Burner off

X106

X35

1

3

4

1

3

3

1

2

M

1

3

4

6

1

2

3

M

4

3

2

1

5

4

2

1

5

6

7

8

2

1

2

1

N

L

L

X35

24V

230V~

24V

230V~

2

7

8

9

10

12

11

1

4

5

6

14

13

3

1 Main PCB

2 Interface PCB

3 Timer

4 Temperature sensor on the heating flow

5 Temperature sensor on the heating return

6 Fan

7 Gas valve assembly

8 3-port diverter valve

9 Pressure sensor

10 Flow rate sensor

11 External ignition transformer

12 Heating pump

13 Ionisation and ignition electrode

14 Main power supply and connection for 230 V control

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 39

G Inspection and maintenance work – Overview

The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na­tional regulations and directives require shorter inspection and maintenance intervals, you should observe these instead of
the intervals listed in the table.

No. Work

Inspection

(annual)

Mainten-

ance

(must be

carried out

at regular

intervals)*

1

Check the air/flue pipe for leak-tightness and to ensure that it is fastened correctly. Make sure
that it is not blocked or damaged and has been installed in accordance with the relevant Installa­tion Manual.

X X

2

Check the general condition of the product. Remove dirt from the product and from the vacuum
chamber.

X X

3

Visually inspect the general condition of the heat exchanger. In doing so, pay particular attention
to signs of corrosion, rust and other defects. If you notice any damage, carry out maintenance
work.

X X

4

Check the gas connection pressure at maximum heat input. If the gas connection pressure is not
within the correct range, carry out maintenance work.

X X

5

Check the CO₂ content (the air ratio) of the product and, if necessary, adjust it. Keep a record of
this.

X X

6

Disconnect the product from the power mains. Check that the electrical plug connections and
other connections are seated correctly and correct these if necessary.

X X

7

Close the gas isolator cock and the service valves.

X X

8

Drain the product on the water side. Check the admission pressure of the expansion vessel and
top the vessel up if necessary (approx. 0.03 MPa/0.3 bar below the system filling pressure).

X

9

Remove the gas-air mixture unit.

X

10

Check the seals in the combustion area. If you see any damage, replace the seals. Replace both
burner seals each time it is opened and accordingly each time maintenance work is carried out.

X

11

Clean the heat exchanger.

X

12

Check the burner for damage and replace it if necessary.

X

13

Check the condensate siphon in the product, clean and fill if necessary.

X X

14

Install the gas-air mixture unit. Caution: Replace the seals.

X

15

If the volume of water is insufficient or the outlet temperature is not reached, replace the second­ary heat exchanger if necessary.

X

16

Clean the filter in the cold water inlet. Replace the filter if impurities can no longer be removed
or if the filter is damaged. In this case, also check the impeller sensor for dirt and damage, clean
the sensor (do not use compressed air for this) and replace the sensor if it is damaged.

X

17

Open the gas isolator cock, reconnect the product to the power mains and switch the product on.

X X

18

Open the service valves, fill up the product/heating installation to 0.05-0.3 MPa/0.5-3.0 bar (de­pending on the static height of the heating installation) and start purging programme P.XX.

X

19

Perform a test operation of the product and heating installation, including hot water generation,
and purge the system once more if necessary.

X X

20

Visually inspect the ignition and burner behaviour.

X X

21 Check the CO₂ content (the air ratio) of the product again.

X

22

Check the product for gas, flue gas, hot water and condensate leaks, and repair if necessary.

X X

23

Record the inspection/maintenance work carried out.

X X

*Note: For those appliances which are not part of an annual service agreement/policy, maintenance must be carried out at least every
5 years.

Appendix

40 Installation and maintenance instructions ENERGY 0020177746_03

H Position of the opening in the air/flue pipe

G

N

N

MM

A

I

I

O

H

H

C

B

L

J

Q

Q

Q

Q

Q

K

P

D, E

F

I

S

R

T

H.1 Positioning of the opening of a fan-supported flue gas pipe

Installation site

Minimum dimen­sions

A

Directly below an opening, air bricks, opening windows, etc., that can be opened. 300 mm

B Above an opening, air bricks, opening windows, etc., that can be opened. 300 mm

C Horizontally to an opening, air bricks, opening windows, etc., that can be opened. 300 mm

D

Below temperature-sensitive building components, e.g. plastic gutters, down pipes or wastewater
pipes

75 mm

E Below eaves 200 mm

F Below balconies or car port roofs 200 mm

G From vertical wastewater pipes or down pipes 150 mm

H From external or internal corners 200 mm

I Above floors, roofs or balconies 300 mm

J From a surface facing a terminal 600 mm

K From a terminal facing a terminal 1,200 mm

L From an opening in the car port (e.g. door, window) which leads into the dwelling 1,200 mm

M Vertical from a terminal on the same wall 1,500 mm

N Horizontal from a terminal on the same wall 300 mm

O From the wall on which the terminal has been installed 0 mm

P From a vertical structure on the roof 300 mm

Q Above the roof area 300 mm

R Horizontal from adjacent windows on pitched or flat roofs 600 mm

S Above adjacent windows on pitched or flat roofs 600 mm

T Below adjacent windows on pitched or flat roofs 2,000 mm

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 41

H.2 Horizontal terminal positioning

BS 5440-1 recommends that fanned flue chimney terminals should be positioned as follows:

a) at least 2 m from an opening in the building directly opposite, and

b) so that the products of combustion are not directed to discharge directly across a boundary if the products are likely to
cause a nuisance to a neighbour or discharge over a walkway or patio.

For IE see current issue of IS 813.

For boilers covered within this manual.

1) Dimensions D, E, F and G:

These clearances may be reduced to 25 mm without affecting the performance of the boiler. In order to ensure that the con­densate plume does not affect adjacent surfaces the terminal should be extended as shown below.

Balcony/eaves

Gutter

Adequately secured
air/flue gas pipe

The flue pipe must
protrude beyond any overhang

2) Dimension H:

This clearance may be reduced to 25 mm without affecting the performance of the boiler. However, in order to ensure that
the condensate plume does not affect adjacent surfaces a clearance of 300 mm is preferred.

For 1 and 2 above you can use a flue gas management kit to enable the termination point to be positioned and directed away
from the building fabric.

Appendix

42 Installation and maintenance instructions ENERGY 0020177746_03

I Commissioning Checklist

© Heating and Hotwater Industry Council (HHIC)

www.centralheating.co.uk

Benchmark Commissioning and
Servicing Section

It is a requirement that the boiler is installed and commissioned to the

completed in full.

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 43

This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating
compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.

GAS BOILER SYSTEM COMMISSIONING CHECKLIST

CONTROLS

Optimum start control

Fitted

Fitted

Fitted

Fitted

ALL SYSTEMS

Yes

Yes

CENTRAL HEATING MODE

OR

mbar OR mbar

COMBINATION BOILERS ONLY

Yes

Yes

DOMESTIC HOT WATER MODE

OR

mbar OR mbar

Yes Temperature

CONDENSING BOILERS ONLY

Yes

ALL INSTALLATIONS

AND

²

Ratio

AND

²

Ratio

Yes

Yes

Yes

Yes

Appendix

44 Installation and maintenance instructions ENERGY 0020177746_03

It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed.

Service Provider

SERVICE RECORD

SERVICE 01

AND

²

%

AND

²

%

SERVICE 02

AND

²

%

AND

²

%

SERVICE 03

AND

²

%

AND

²

%

SERVICE 04

AND

²

%

AND

²

%

SERVICE 05

AND

²

%

AND

²

%

SERVICE 06

AND

²

%

AND

²

%

SERVICE 07

AND

²

%

AND

²

%

SERVICE 08

AND

²

%

AND

²

%

SERVICE 09

AND

²

%

AND

²

%

SERVICE 10

AND

²

%

AND

²

%

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 45

PRIOR TO CO AND COMBUSTION RATIO CHECK

The boiler manufacturer’s installation instructions should have been followed, gas type verified and gas

supply pressure/rate checked as required prior to commissioning.

As part of the installation process, especially where a flue has been fitted by persons other than the

boiler installer, visually check the integrity of the whole flue system to confirm that all components are

correctly assembled, fixed and supported. Check that manufacturer’s max. flue lengths have not been

exceeded and all guidance has been followed (e.g. Gas Safe Technical Bulletin TB008).

The flue gas analyser should be of the correct type, as specified by BS 7967

Prior to its use, the flue gas analyser should have been maintained and calibrated as specified by the

manufacturer. The installer must have the relevant competence for use of the analyser.

Check and zero the analyser IN FRESH AIR as per analyser manufacturer’s instructions.

NOTE

THE AIR GAS RATIO VALVE IS FACTORY

SET AND MUST NOT BE ADJUSTED
DURING COMMISSIONING UNLESS THIS
ACTION IS RECOMMENDED FOLLOWING

CONTACT WITH THE MANUFACTURER.
If any such adjustment is recommended and
further checking of the boiler is required the

installer/service engineer must be competent

to carry out this work and to use the flue gas

analyser accordingly.

If the boiler requires conversion to operate with

a different gas family (e.g. conversion from

natural gas to LPG) separate guidance will be

provided by the boiler manufacturer

CARRY OUT FLUE INTEGRITY CHECK USING ANALYSER

Insert analyser probe into air inlet test point and allow readings to stabilise.

NOTE - where no air inlet test point is provided then a flue integrity check

with the analyser is not possible. The installer should verify that flue

integrity has been visually checked in accordance with the “Prior to

CO and combustion ratio check” box above before proceeding to the

“Check CO and combustion ratio at maximum rate” stage below.

SET BOILER TO MINIMUM RATE

In accordance with boiler instructions, set boiler to operate at minimum rate (to

minimum load condition). Allow sufficient time for combustion to stabilise.

NOTE - If manufacturer’s instructions do not specify how to set boiler to minimum

rate contact Technical Helpline for advice.

CHECK CO AND COMBUSTION RATIO AT MINIMUM RATE

With boiler still set at minimum rate, insert analyser probe into flue gas sampling

point. Allow readings to stabilise before recording.

NOTE - If no flue gas sampling point is present and the correct procedure is not

specified in the manual, consult boiler manufacturer for guidance.

CHECK CO AND COMBUSTION RATIO AT MAX. RATE

With boiler still set at maximum rate, insert analyser probe into flue gas

sampling point. Allow readings to stabilise before recording.

NOTE - If no flue gas sampling point is present and the correct procedure is

not specified in the manual, consult boiler manufacturer for guidance.

SET BOILER TO MAXIMUM RATE

In accordance with boiler instructions, set boiler to operate at max. rate

(full load condition). Allow sufficient time for combustion to stabilise.

NOTE - Do not insert analyser probe during this period to avoid

possible “flooding” of sensor.

Is
CO less than
350ppm and
CO/CO

2

ratio

less than 0.004

Is

O

2

 20.6%

and

CO

2

< 0.2%

Is
CO less than
350ppm and
CO/CO

2

ratio

less than 0.004

BOILER IS OPERATING SATISFACTORILY

no further actions required.

Ensure test points are capped, boiler case is correctly replaced and

all other commissioning procedures are completed.

Complete Benchmark Checklist, recording CO and combustion ratio

readings as required.

TURN OFF APPLIANCE AND CALL

MANUFACTURER’S TECHNICAL HELPLINE

FOR ADVICE.

THE APPLIANCE MUST NOT BE

COMMISSIONED UNTIL PROBLEMS ARE

IDENTIFIED AND RESOLVED.

VERIFY FLUE INTEGRITY

Analyser readings indicate that combustion products

and inlet air must be mixing. Further investigation of

the flue is therefore required.

Check that flue components are assembled, fixed

and supported as per boiler/flue manufacturer’s

instructions.

Check that flue and flue terminal are not obstructed.

Is

CO

less than

335ppm

and

CO/CO

2

ratio less

than 0.004

Is

O

2

 20.6%

and

CO

2

< 0.2%

Check all seals around the appliance burner,

internal flue seals, door and case seals.

Rectify where necessary.

TURN OFF APPLIANCE AND CALL

MANUFACTURER’S TECHNICAL HELPLINE

FOR ADVICE.

THE APPLIANCE MUST NOT BE

COMMISSIONED UNTIL PROBLEMS ARE

IDENTIFIED AND RESOLVED. IF

COMMISSIONING CANNOT BE FULLY

COMPLETED, THE APPLIANCE MUST BE

DISCONNECTED FROM THE GAS SUPPLY IN

ACCORDANCE WITH THE GSIUR.

NOTE: Check and record CO and combustion ratio

at both max. and min. rate before contacting the

manufacturer.

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

Appendix

46 Installation and maintenance instructions ENERGY 0020177746_03

J Pipe lengths for the air/flue pipe

J.1 Length of the C13 type air/flue pipe

Applicability: C13 type air/flue pipe

Diameter of the air/flue pipe

Dia. 60/100 (L) Dia. 80/125 (L)

C13 type air/flue
pipe

C13 type air/flue
pipe

ENERGY 25c -A
(H-GB)

≤ 10 m ≤ 25 m

ENERGY 30c -A
(H-GB)

≤ 10 m ≤ 25 m

ENERGY 35c -A
(H-GB)

≤ 10 m ≤ 25 m

J.2 Length of the C33 type air/flue pipe

Applicability: C33 type air/flue pipe

Diameter of the air/flue pipe

Dia. 60/100 (L) Dia. 80/125 (L)

C33 type air/flue
pipe

C33 type air/flue
pipe

ENERGY 25c -A
(H-GB)

≤ 10 m ≤ 25 m

ENERGY 30c -A
(H-GB)

≤ 10 m ≤ 25 m

ENERGY 35c -A
(H-GB)

≤ 10 m ≤ 25 m

J.3 Length of the C43 type air/flue pipe

Applicability: C43 type air/flue pipe

Diameter of the
air/flue pipe

Dia. 60/100 (L)

C43 type air/flue
pipe

ENERGY 25c -A
(H-GB)

≤ 5 m

ENERGY 30c -A
(H-GB)

≤ 5 m

ENERGY 35c -A
(H-GB)

≤ 5 m

K Technical data

Technical data – Heating

ENERGY 25c -A (H­GB)

ENERGY 30c -A (H­GB)

ENERGY 35c -A (H­GB)

Max. flow temperature adjustment
range (default setting: 75 °C)

10 … 80 ℃ 10 … 80 ℃ 10 … 80 ℃

Maximum permissible pressure

0.3 MPa

(3.0 bar)

0.3 MPa

(3.0 bar)

0.3 MPa

(3.0 bar)

Nominal water flow (ΔT = 20 K)

788 l/h 1,094 l/h 1,102 l/h

Nominal water flow (ΔT = 30 K)

525 l/h 729 l/h 876 l/h

Appendix

0020177746_03 ENERGY Installation and maintenance instructions 47

ENERGY 25c -A (H­GB)

ENERGY 30c -A (H­GB)

ENERGY 35c -A (H­GB)

Approximate value for the
condensate volume (pH value
between 3.5 and 4.0) at 50/30 °C

1.84 l/h 2.55 l/h 2.57 l/h

ΔP heating at nominal flow (ΔT =
20 K)

0.025 MPa

(0.250 bar)

0.025 MPa

(0.250 bar)

0.018 MPa

(0.180 bar)

Technical data – G20 power/loading G20

The lowest nominal heat output may be higher than the value in the technical data, depending on the design of the system
and the current operating status.

ENERGY 25c -A (H­GB)

ENERGY 30c -A (H­GB)

ENERGY 35c -A (H­GB)

Maximum heat output

18 kW 25 kW 25 kW

Effective output range (P)
at 40/30 °C

5.4 … 19.5 kW 6.5 … 27.0 kW 7.6 … 27.2 kW

Effective output range (P)
at 50/30 °C

5.3 … 19.1 kW 6.3 … 26.5 kW 7.5 … 26.7 kW

Effective output range (P)
at 80/60 °C

5.0 … 18.3 kW 6.1 … 25.4 kW 7.2 … 25.6 kW

Domestic hot water heat
output (P)

5.0 … 25.2 kW 6.0 … 30.0 kW 7.1 … 35.0 kW

Maximum heat input –
heating (Q max.)

18.4 kW 25.5 kW 25.7 kW

Minimum heat input – heat­ing (Q min.)

5.1 kW 6.1 kW 7.2 kW

Maximum heat input – hot
water (Q max.)

25.7 kW 30.6 kW 35.7 kW

Minimum heat input – hot
water (Q min.)

5.1 kW 6.1 kW 7.2 kW

Technical data – Domestic hot water

ENERGY 25c -A (H­GB)

ENERGY 30c -A (H­GB)

ENERGY 35c -A (H­GB)

Specific flow rate (D) (ΔT = 30 K)
in accordance with EN 13203

12.1 l/min 14.2 l/min 16.5 l/min

Continuous flow rate (ΔT = 35 K)

622 l/h 730 l/h 849 l/h

Specific flow rate (ΔT = 35 K)

10.4 l/min 12.2 l/min 14.1 l/min

Minimum permissible pressure

0.03 MPa

(0.30 bar)

0.03 MPa

(0.30 bar)

0.03 MPa

(0.30 bar)

Maximum permissible pressure

1 MPa

(10 bar)

1 MPa

(10 bar)

1 MPa

(10 bar)

Recommended pressure

0.2 MPa

(2.0 bar)

0.2 MPa

(2.0 bar)

0.2 MPa

(2.0 bar)

Temperature range

35 … 60 ℃ 35 … 60 ℃ 35 … 60 ℃

Flow rate limiter

8.0 l/min 10.0 l/min 12.0 l/min

Technical data – General

ENERGY 25c -A (H­GB)

ENERGY 30c -A (H­GB)

ENERGY 35c -A (H­GB)

Gas category

I

2H

I

2H

I

2H

Diameter of the gas pipe

1/2 inch 1/2 inch 1/2 inch

Diameter of the heating connec­tions

3/4 inch 3/4 inch 3/4 inch

Expansion relief valve connector
(min.)

15 mm 15 mm 15 mm

Condensate drain pipework (min.)

21.5 mm 21.5 mm 21.5 mm

G20 gas supply pressure

2.0 kPa

(20.0 mbar)

2.0 kPa

(20.0 mbar)

2.0 kPa

(20.0 mbar)

Appendix

48 Installation and maintenance instructions ENERGY 0020177746_03

ENERGY 25c -A (H­GB)

ENERGY 30c -A (H­GB)

ENERGY 35c -A (H­GB)

Gas flow at P max. – hot water
(G20)

2.7 m³/h 3.2 m³/h 3.8 m³/h

Gas flow at P max. – heating mode
(G20)

1.9 m³/h 2.7 m³/h 2.7 m³/h

Gas flow at P min. (G20)

0.540 m³/h 0.646 m³/h 0.762 m³/h

CE number (PIN)

CE-0063CP3646 CE-0063CP3646 CE-0063CP3646

Flue gas mass rate in heating
mode at P min.

2.34 g/s 2.80 g/s 3.30 g/s

Flue gas mass rate in heating
mode at P max.

8.3 g/s 11.5 g/s 11.6 g/s

Flue gas mass rate in hot water
handling mode at P max.

11.6 g/s 13.8 g/s 16.1 g/s

Flue gas temperature (80 °C/60 °C)
at P max.

60 ℃ 77 ℃ 82 ℃

Flue gas temperature (80 °C/60 °C)
at P min.

55 ℃ 55 ℃ 56 ℃

Flue gas temperature (50 °C/30 °C)
at P max.

51 ℃ 62 ℃ 56 ℃

Flue gas temperature (50 °C/30 °C)
at P min.

34 ℃ 35 ℃ 37 ℃

Flue gas temperature in hot water
handling mode

69 ℃ 68 ℃ 75 ℃

Flue gas temperature when over­heating

105 ℃ 95 ℃ 104 ℃

Released system types

C13, C33, C43 C13, C33, C43 C13, C33, C43

Nominal efficiency at 80/60 °C

99.6 % 99.6 % 99.6 %

Nominal efficiency at 50/30 °C

104.0 % 104.0 % 104.0 %

Nominal efficiency at 40/30 °C

106.0 % 106.0 % 106.0 %

Nominal efficiency in partial load
operation (30%) at 40/30 °C

108.5 % 108.5 % 108.5 %

NOx class

5 5 5

Product dimensions, width

390 mm 390 mm 390 mm

Product dimensions, depth

280 mm 280 mm 280 mm

Product dimensions, height

700 mm 700 mm 700 mm

Net weight

32 kg 33 kg 33 kg

Weight when filled with water

36 kg 38 kg 38 kg

Technical data – Electrics

ENERGY 25c -A (H­GB)

ENERGY 30c -A (H­GB)

ENERGY 35c -A (H­GB)

Electric connection

230 V / 50 Hz 230 V / 50 Hz 230 V / 50 Hz

Built-in fuse (slow-blow)

T2/2A, 250V T2/2A, 250V T2/2A, 250V

Max. electrical power consump­tion

66 W 75 W 60 W

Standby electrical power con­sumption

2 W 2 W 3 W

Level of protection

IPX4D IPX4D IPX4D

Index

0020177746_03 ENERGY Installation and maintenance instructions 49

Index

A

Air/flue pipe, installed ............................................................ 5

B

Burner anti-cycling time ....................................................... 21

Bypass valve .......................................................................22

C

CE label .................................................................................8

Check programmes ........................................................... 30

Using..............................................................................16

Checking the burner ............................................................ 25

Checking the pre-charge pressure of the expansion

vessel .................................................................................. 26

Cleaning the condensate siphon.........................................25

Cleaning the heat exchanger ..............................................24

CO₂ content

Checking.................................................................. 20, 23

Competent person.................................................................4

Completing inspection work ................................................ 26

Completing maintenance work ............................................ 26

Condensate discharge pipe................................................. 12

Condensate siphon

Filling .............................................................................18

Controller............................................................................. 15

Corrosion............................................................................... 5

D

Decommissioning................................................................29

Decommissioning the product ............................................. 29

Diagnostics codes

Using..............................................................................15

Documents ............................................................................ 7

Draining the product ............................................................ 26

E

Electricity ...............................................................................5

Expansion relief valve ......................................................... 28

F

Fault codes ..........................................................................26

Fault memory ...................................................................... 26

Fault messages ................................................................... 26

Fault symbol ........................................................................ 16

Flow rate-pressure curves ...................................................21

Flue gas route .......................................................................5

Front casing, closed .............................................................. 5

Frost ...................................................................................... 5

G

Gas family check ................................................................. 16

Gas flow rate ....................................................................... 18

H

Handing over to the end user .............................................. 22

High-efficiency pump...........................................................21

High-efficiency pump output ................................................21

I

Identification plate ................................................................. 7

If you smell flue gas............................................................... 5

If you smell gas ..................................................................... 4

Inspection work ............................................................. 22, 39

Installation site....................................................................... 5

Intended use.......................................................................... 4

L

Leak-tightness .........................................................20, 26, 29

M

Maintenance work .........................................................22, 39

Minimum clearance ...............................................................9

P

Power supply .......................................................................14

Preparing the repair work ....................................................26

Preparing, repair work ......................................................... 26

Pressure sensor ..................................................................29

Pump head .......................................................................... 27

Q

Qualification...........................................................................4

R

Regulations ...........................................................................6

Removing the air intake pipe...............................................24

Removing the burner ...........................................................24

Removing the flue gas pipe.................................................24

Removing the front casing...................................................10

Removing the gas-air mixture unit....................................... 24

Removing the ignition transformer ......................................24

Removing the side section .................................................. 10

Replacing the burner ........................................................... 26

Replacing the expansion vessel.......................................... 28

Replacing the heat exchanger.............................................26

Replacing the main PCB ..................................................... 28

Replacing the PCB for the user interface............................28

Replacing, expansion vessel ...............................................28

Resetting the burner anti-cycling time ................................. 21

S

Safety device .........................................................................5

Schematic drawing ................................................................ 5

Setting the burner anti-cycling time ..................................... 21

Spare parts ..........................................................................23

Switching on the product .....................................................18

T

Tool .......................................................................................6

Transport ...............................................................................5

Transporting .......................................................................... 8

Treating the heating water .................................................. 16

U

Unloading the box ................................................................. 8

Unpacking the product .......................................................... 8

Using

Check programmes .......................................................16

Diagnostics codes..........................................................15

V

Voltage .................................................................................. 5

Volume flow sensor ............................................................. 29

W

Wall-mounting the product .................................................... 9

Weight ................................................................................... 9

0020177746_03

Manufacturer/Supplier

Vaillant Group UK LTD

Nottingham Road ‒ Belper ‒ Derbyshire DE56 1JQ
Telephone [phone] ‒ Technical helpline 0330 100 7679
After sales service 0330 100 3142

www.glow-worm.co.uk

0020177746_03 ‒ 16.11.2017

© These instructions, or parts thereof, are protected by copyright and may be repro­duced or distributed only with the manufacturer's written consent.

We reserve the right to make technical changes.