Glowworm Energy7 Series User manual

Operating instruc-
tions
Energy7
Energy725c ‑A (H‑GB)
Energy730c ‑A (H‑GB)
Energy735c ‑A (H‑GB)
GB, IE

Contents
2Operating instructions Energy70020300878_00
Contents
1 Safety ............................................ 3
1.1 Action-related warnings ................. 3
1.2 Intended use .................................. 3
1.3 General safety information............. 4
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
3 Product description..................... 7
3.1 CE marking .................................... 7
3.2 Benchmark..................................... 7
3.3 Information on the data plate ......... 8
3.4 Design of the product..................... 8
3.5 Overview of the operator control
elements ........................................ 8
3.6 Operating levels........................... 10
4 Operation.................................... 10
4.1 Starting up the product ................ 10
4.2 Basic display................................ 10
4.3 Checking the heating system
pressure....................................... 10
4.4 Filling the heating installation....... 10
4.5 Setting the operating mode.......... 11
4.6 Setting the domestic hot water
temperature ................................. 11
4.7 Setting the heating flow
temperature ................................. 11
4.8 Product settings ........................... 12
4.9 Switching the product to
standby mode .............................. 12
5 Troubleshooting ........................ 12
5.1 Detecting and eliminating
faults ............................................ 12
5.2 Fault codes in the display ............ 12
6 Care and maintenance .............. 12
6.1 Maintenance ................................ 12
6.2 Caring for the product .................. 12
6.3 Checking the condensate
discharge pipe and tundish.......... 12
7 Decommissioning...................... 13
7.1 Temporarily decommissioning
the product................................... 13
7.2 Permanently decommissioning
the product................................... 13
8 Recycling and disposal............. 13
9 Guarantee and customer
service ........................................ 13
9.1 Guarantee.................................... 13
9.2 Customer service......................... 13
Appendix ............................................... 14
A Adjustable values –
overview ..................................... 14
B Troubleshooting ........................ 14

Safety 1
0020300878_00 Energy7Operating instructions 3
1 Safety
1.1 Action-related warnings
Classification of action-re-
lated warnings
The action-related warnings
are classified in accordance
with the severity of the pos-
sible danger using the follow-
ing 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 envir-
onmental damage
1.2 Intended use
There is a risk of injury or death
to the user or others, or of dam-
age to the product and other
property in the event of im-
proper use or use for which it
is not intended.
The product is intended as a
heat generator for sealed heat-
ing installations and for do-
mestic hot water generation.
Intended use includes the fol-
lowing:
–observance of the operating
instructions included for the
product and any other install-
ation components
–compliance with all inspection
and maintenance conditions
listed in the instructions.
This product can be used by
children aged from 8 years
and above and persons with
reduced physical, sensory or
mental capabilities or lack of
experience and knowledge if
they have been given supervi-
sion or instruction concerning
use of the product in a safe way
and understand the hazards in-
volved. Children must not play
with the product. Cleaning and
user maintenance work must
not be carried out by children
unless they are supervised.
Any other use that is not spe-
cified in these instructions, or
use beyond that specified in this
document, shall be considered
improper use. Any direct com-
mercial or industrial use is also
deemed to be improper.
Caution.
Improper use of any kind is
prohibited.

1 Safety
4Operating instructions Energy70020300878_00
1.3 General safety
information
1.3.1 Installation by skilled
tradesmen only
The installation, inspection,
maintenance and repair of the
product, as well as the gas ratio
settings, must only be carried
out by a competent person.
1.3.2 Danger caused by
improper operation
Improper operation may present
a danger to you and others, and
cause material damage.
▶Carefully read the enclosed
instructions and all other ap-
plicable documents, particu-
larly the "Safety" section and
the warnings.
▶Only carry out the activities
for which instructions are
provided in these operating
instructions.
1.3.3 Risk of death from
escaping gas
What to do if you smell gas in
the building:
▶Avoid rooms that smell of
gas.
▶If possible, open doors and
windows fully and ensure
adequate ventilation.
▶Do not use naked flames (e.g.
lighters, matches).
▶Do not smoke.
▶Do not use any electrical
switches, mains plugs, door-
bells, 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
stopcock on the product.
▶Warn other occupants in the
building by yelling or banging
on doors or walls.
▶Leave the building immedi-
ately and ensure that others
do not enter the building.
▶Notify the gas supply
company or the Emer-
gency Service Provider
[phone] by tele-
phone once you are outside
of the building.
1.3.4 Risk of death due to
blocked or leaking flue
pipework
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.
▶Inform a competent person.

Safety 1
0020300878_00 Energy7Operating instructions 5
1.3.5 Risk of death due to
explosive and flammable
materials
▶Do not use the product in
storage rooms that contain
explosive or flammable sub-
stances (such as petrol, pa-
per or paint).
1.3.6 Risk of death due to lack
of safety devices
A lack of safety devices (e.g.
expansion relief valve, expan-
sion vessel) can lead to poten-
tially fatal scalding and other in-
juries, e.g. due to explosions.
▶Ask a competent person
to explain how the safety
devices work and where they
are located.
1.3.7 Risk of death due to
changes
to the product or the
product environment
▶Never remove, bridge or
block the safety devices.
▶Do not tamper with any of the
safety devices.
▶Do not damage or remove
any tamper-proof seals on
components.
▶Do not make any changes:
–The product itself
–to the gas, supply air, water
and electricity supply lines
–to the entire flue system
–to the entire condensate
discharge system
–to the expansion relief valve
–to the drain pipework
–to constructional condi-
tions that may affect the
operational reliability of the
product
1.3.8 Risk of injury and
material damage due to
maintenance and repairs
carried out incorrectly or
not carried out at all
▶Never attempt to carry out
maintenance work or repairs
on your product yourself.
▶Faults and damage should
be immediately rectified by a
competent person.
▶Adhere to the maintenance
intervals specified.
1.3.9 Risk of
corrosion damage due to
unsuitable combustion
and room air
Sprays, solvents, chlorinated
cleaning agents, paint, adhes-
ives, ammonia compounds,
dust or similar substances may
lead to corrosion on the product
and in the air/flue pipe.
▶Ensure that the combustion
air supply is always free of
fluorine, chlorine, sulphur,
dust, etc.

1 Safety
6Operating instructions Energy70020300878_00
▶Ensure that no chemical sub-
stances are stored at the in-
stallation site.
1.3.10 Cabinet-type casing
Enclosing the product in cab-
inet-type casing requires com-
pliance with the applicable
design instructions.
▶Do not fit the casing on the
product yourself.
▶If you require cabinet-type
casing for the product, consult
an approved heating special-
ist company.
1.3.11 Risk of material damage
caused by frost
▶Ensure that the heating in-
stallation always remains in
operation during freezing con-
ditions and that all rooms are
sufficiently heated.
▶If you cannot ensure the oper-
ation, have a competent per-
son drain the heating installa-
tion.

Notes on the documentation 2
0020300878_00 Energy7Operating instructions 7
2 Notes on the
documentation
2.1 Observing other applicable
documents
▶You must observe all operating instruc-
tions enclosed with the system compon-
ents.
2.2 Storing documents
▶Keep this manual and all other applic-
able documents safe for future use.
2.3 Validity of the instructions
These instructions apply only to:
Product article number
Article num-
ber
Gas Council
Number
Energy7 25c
‑A (H‑GB)
0010035896 47-019-60
Energy7 30c
‑A (H‑GB)
0010035897 47-019-61
Energy7 35c
‑A (H‑GB)
0010035898 47-019-62
3 Product description
3.1 CE marking
The CE marking shows that the products
comply with the basic requirements of the
applicable directives as stated on the de-
claration of conformity.
The declaration of conformity can be
viewed at the manufacturer's site.
3.2 Benchmark
Glow-worm is a licensed member of the
Benchmark Scheme which aims to im-
prove the standards of installation and
commissioning of domestic heating and
hot water systems in the UK and to en-
courage regular servicing to optimise
safety, efficiency and performance.
Benchmark is managed and promoted
by the Heating and Hotwater Industry
Council. For more information visit
www.benchmark.org.uk.
▶Please ensure that the installer has fully
completed the Benchmark Checklist on
the inside back pages of the installation
instructions supplied with the product
and that you have signed it to say that
you have received a full and clear ex-
planation of its operation. The installer
is legally required to complete a com-
missioning checklist as a means of
complying with the appropriate Build-
ing Regulations (England and Wales).
All installations must be notified to Local
Area Building Control either directly or
through a Competent Persons Scheme.
A Building Regulations Compliance Certi-
ficate will then be issued to the customer
who should, on receipt, write the Notifica-
tion Number on the Benchmark Checklist.
This product should be serviced regularly
to optimise its safety, efficiency and per-
formance. The service engineer should
complete the relevant Service Record on
the Benchmark Checklist after each ser-
vice.
The Benchmark Checklist will be required
in the event of any warranty.

3 Product description
8Operating instructions Energy70020300878_00
3.3 Information on the data plate
The data plate is mounted on the under-
side of the product at the factory.
Information
on the data
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
Energy7..c Product designation
2H, G20
–2.0 kPa
(20 mbar)
Factory setting for gas type
and gas connection pressure
Cat. Unit category
Condensing
technology
Efficiency class of the boiler
in accordance with EC Dir-
ective 92/42/EEC
Type: Xx3(x) Permissible flue gas connec-
tions
PMS Maximum water pressure in
heating mode
PMW Maximum water pressure in
domestic hot water mode
V / Hz Electrical connection
W Max. electrical power con-
sumption
IP IP rating
Heating mode
Pn Nominal heat output range
in heating mode
Pnc Nominal heat output range
in heating mode (condensing
technology)
P Nominal heat output range
in domestic hot water mode
Information
on the data
plate
Meaning
Qn Nominal heat input range in
heating mode
Qnw Nominal heat input range in
domestic hot water mode
Tmax. Max. flow temperature
NOx NOx class for the product
Code (DSN) Specific product code
Read the instructions.
GC no. Gas council number
3.4 Design of the product
2
1
1 Magnetic brief
operating in-
structions with
type designation
and serial num-
ber
2 Control elements
3.5 Overview of the operator
control elements
1
2
34
5
1 Display
2 Button
3 Button
4 Button
5 Fault clearance
key

Product description 3
0020300878_00 Energy7Operating instructions 9
3.5.1 Description of the display
1
2
3
1 Operating in-
formation
2 Active operating
mode, selecting
and confirming
the operating
mode
3 Filling pressure,
additional in-
formation
Symbol Meaning
Burner operating correctly
–Burner on
Filling pressure of the heat-
ing installation
–Permanently on: Filling
pressure in the permitted
range.
–Flashing: Filling pres-
sure outside the permit-
ted range.
DHW mode
–Permanently on: Do-
mestic hot water activated
–Flashing: Burner on in
draw-off mode
ECO domestic hot water
mode
–Domestic hot water tem-
perature 50 °C
–Normal operating temper-
ature
–Warm start for domestic
hot water deactivated
(combi boiler)
Symbol Meaning
Heating mode
–Permanently on: Heating
mode activated
–Flashing: Burner on in
heating mode
Display flashing:
–Switching on the product
–Fault
Setting confirmed
/Fault in the product
–Appears instead of the
basic display.
OFF –Appears when switching
the product to standby
mode.
3.5.2 Functional description of
buttons
Button Meaning
–Selecting the operating mode
–Confirm the operating mode
–Confirm the set value
–Increase the display contrast
or –Setting the domestic hot water
temperature
–Setting the heating flow tem-
perature
–Increase or decrease the selec-
ted set value
–Increase the display contrast
–Activate the product: On/off
(standby)
–Reset the product
Adjustable values flash on the display.
You must confirm any change to a value.
Only then is the new setting saved.
If you do not press any buttons for five
seconds, the displays switches back to
the basic display.
If you do not press any buttons for one
minute, the display contrast decreases.

4 Operation
10 Operating instructions Energy70020300878_00
3.6 Operating levels
The product has two operating levels:
The end user level contains information
and setting options that you require as the
end user
The installer level is reserved for the com-
petent person. It is protected by a code.
Only competent persons may change any
settings in the installer level.
Adjustable values –overview (→Page 14)
4 Operation
4.1 Starting up the product
4.1.1 Opening the isolators
1. Ask the competent person who in-
stalled the product to explain to you
where these isolators are located and
how to handle them.
2. Open the gas stopcock fully.
3. Check that the heating installation flow
and return service valves are open, if
such service valves are installed.
4. Open the cold-water isolation valve.
To check, you can turn on a hot water
tap and see whether water is escaping
there.
4.1.2 Switching on the product
▶Switch on the product via the main
switch installed on-site.
4.2 Basic display
The filling pressure of the heating installa-
tion and the operating mode are shown in
the display's basic display.
To return to the basic display:
–Wait more than five seconds without
pressing any buttons.
If a fault message is present, the basic
display switches to the fault code.
4.3 Checking the heating system
pressure
1. Once a month, check that the pressure
in the central heating system, which
is displayed on the user interface, is
between 0.05 MPa and 0.27 MPa
(0.5 bar and 2.7 bar).
◁If the filling pressure is correct, no
action needs to be taken.
▽If the filling pressure is too low, add
more water to the heating installa-
tion.
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.
2. Fill the heating installation. (→Page 10)
4.4 Filling the heating installation
Caution.
Risk of material damage due
to heating water that is ex-
tremely calciferous or corros-
ive or contaminated by chem-
icals.
Unsuitable tap water damages
the seals and diaphragms,
blocks components in the
product and heating installation
through which the water flows
and causes noise.

Operation 4
0020300878_00 Energy7Operating instructions 11
▶Only fill the heating installa-
tion with suitable heating wa-
ter.
Note
The competent person is respons-
ible for filling the heating installa-
tion the first time, any subsequent
top-ups and the water quality.
The operator alone is respons-
ible for topping up the water in the
heating installation.
1. Open all radiator valves (thermostatic
radiator valves) of the heating installa-
tion.
2. Slowly open the filling cock, as shown
to you by the competent person.
3. Fill with water until the required filling
pressure is reached.
4. Check the filling pressure in the
display.
5. Close the filling cock after filling.
4.5 Setting the operating mode
Note
Each time the product is switched
on, the last selected operating
mode is assumed.
▶Press repeatedly until the display
shows the required operating mode.
Symbol Operating mode
+
Heating + domestic hot wa-
ter
Heating only
Domestic hot water only
‒No requirement
4.6 Setting the domestic hot water
temperature
Condition: The temperature is controlled by the
boiler
▶Set the domestic hot water temperature
on the boiler (→Page 12).
Condition: The temperature is controlled by the con-
trol
▶Set the domestic hot water temperature
on the control.
Note
If you press the or button,
the display shows the sym-
bol.
4.7 Setting the heating flow
temperature
Condition: Temperature controlled by the boiler, with
heating mode activated
▶Set the heating flow temperature on the
boiler (→Page 12).
Note
The competent person may
have adjusted the maximum
possible temperature.
Condition: Temperature controlled by the control,
with heating mode activated
▶Set the maximum heating flow temper-
ature on the boiler (→Page 12).
▶Set the room temperature on the con-
trol.
◁The actual heating flow temperature
is set automatically by the control.

5 Troubleshooting
12 Operating instructions Energy70020300878_00
4.8 Product settings
Note
The sequence in which the avail-
able settings are shown depends
on the operating mode selected.
If the Domestic hot water + Heat-
ing operating mode is selected, the
domestic hot water temperature
must be confirmed in order to set
the flow temperature of the heat-
ing.
1. Press the or button to set the
temperature.
2. Press the button to confirm.
4.9 Switching the product to
standby mode
▶Press the button for less than three
seconds.
◁Once the requirement currently in
use has finished, the display will
show OFF and go out.
◁The product is now in standby mode.
◁The product's frost protection func-
tion is activated.
◁The main power supply is not inter-
rupted. The product continues to be
supplied with power.
5 Troubleshooting
5.1 Detecting and eliminating
faults
▶If problems occur whilst operating the
product, you can carry out certain self-
checks with the aid of the table in the
appendix.
Troubleshooting (→Page 14)
▶If the product still does not function
without problems after the checks have
been carried out using the table, con-
tact your competent person to rectify
the problem.
5.2 Fault codes in the display
Fault codes have priority over all other dis-
plays. If several faults occur at the same
time, the corresponding codes are dis-
played alternately for two seconds each.
▶If your product displays a fault code
(F.xx), contact a competent person.
6 Care and maintenance
6.1 Maintenance
An annual inspection of the product carried
out by a competent person is a prerequis-
ite for ensuring that the product is perman-
ently ready and safe for operation, reliable,
and has a long working life.
6.2 Caring for the product
▶Clean the casing with a damp cloth and
a little solvent-free soap.
▶Do not use sprays, scouring agents,
detergents, solvents or cleaning agents
that contain chlorine.
6.3 Checking the condensate
discharge pipe and tundish
The condensate discharge pipe and tun-
dish must always be penetrable.
▶Regularly check the condensate dis-
charge pipe and tundish for faults and,
particularly, for blockages.
You must not be able to see or feel any
obstructions in the condensate discharge
pipe and tundish.
▶If you notice a fault, have it eliminated
by a competent person.

Decommissioning 7
0020300878_00 Energy7Operating instructions 13
7 Decommissioning
7.1 Temporarily decommissioning
the product
▶Temporarily decommission the product
only if there is no risk of frost.
▶Switch off the product via the main
switch provided on-site.
◁The display goes out.
▶When decommissioning for an exten-
ded period (e.g. holiday), you should
also close the gas isolator cock and the
cold water stop cock.
7.2 Permanently decommissioning
the product
▶Have a competent person permanently
decommission the product.
8 Recycling and disposal
▶The competent person who installed
your product is responsible for the dis-
posal of the packaging.
If the product is labelled with this
mark:
▶In this case, do not dispose of the
product with the household waste.
▶Instead, hand in the product to a collec-
tion centre for waste electrical or elec-
tronic equipment.
If the product contains batteries that
are labelled with this mark, these batteries
may contain substances that are hazard-
ous to human health and the environment.
▶In this case, dispose of the batteries at
a collection point for batteries.
9 Guarantee and customer
service
9.1 Guarantee
For information on the manufacturer's
guarantee, you can write to the contact ad-
dress that is provided on the back page
or by visiting https://self-service.glow-
worm.co.uk/warranty-registration/step-
one/.
9.2 Customer service
For contact details for our customer ser-
vice department, you can write to the ad-
dress that is provided on the back page, or
you can visit www.glow-worm.co.uk.

Appendix
14 Operating instructions Energy70020300878_00
Appendix
A Adjustable values –overview
Adjustable values Values Unit Increment, select Factory set-
ting
Min. Max.
Heating mode
Heating flow temperature Current value ℃1 75
38 Preset
in the in-
stallation
DHW mode
Domestic hot water temper-
ature
Current value ℃1 60
35 60
ECO domestic hot water
temperature
Current value ℃1 Deactivated
38 50
B Troubleshooting
Fault Cause Measure
Product does not
start up:
–No hot water
–Heating re-
mains cold
The gas stopcock installed on-site
and/or the gas stopcock on the product
is closed.
Open both gas stopcocks.
The cold-water isolation valve is closed. Open the cold-water isolation
valve.
The power supply in the building is dis-
connected.
Check the fuse in the building.
The product switches on automat-
ically when mains voltage is re-
stored.
The product is switched off. Switch on the product.
The heating flow temperature is set
too low or to the Heating off position,
and/or the domestic hot water temperat-
ure is set too low.
Set the heating flow and domestic
hot water temperature.
The system pressure is insufficient.
Water deficiency in the heating installa-
tion (fault message: F.22).
Fill the heating installation.
There is air in the heating installation. Have a competent person purge
the heating installation.
After three unsuccessful ignition at-
tempts, the product switches to fault
mode (fault message: F.28).
Press the reset button for one
second. The product makes an-
other ignition attempt.
If you have been unable to elimin-
ate the ignition fault after three re-
set attempts, consult a competent
person.
There is a fault in the flue gas route. Have a competent person rectify
the fault.

Appendix
0020300878_00 Energy7Operating instructions 15
Fault Cause Measure
Product does not
start up:
–No hot water
–Heating re-
mains cold
If fault F.83 is displayed, press the
reset button. If the fault persists
and you have pressed the reset
button once more, a burner anti-
cycling time of 45 minutes is auto-
matically activated. The display
shows S.54. If the fault persists,
consult a competent person.
Domestic hot wa-
ter generation
functioning cor-
rectly; heating
does not start up The external control is not set correctly.
Set the external control correctly
(→Control operating instructions).

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
0020300878_00 ‒02.03.2020
© These instructions, or parts thereof, are protected by copyright and may be
reproduced or distributed only with the manufacturer's written consent.
Subject to technical modifications.
0020300878_00