Glowworm Energy7 25c -A User manual

Installation and main-
tenance instructions
Energy7
Energy725c ‑A (H‑GB)
Energy730c ‑A (H‑GB)
Energy735c ‑A (H‑GB)
GB, IE

Contents
2Installation and maintenance instructions Energy70020300875_01
Contents
1 Safety .................................................................... 4
1.1 Intended use .......................................................... 4
1.2 Qualification ........................................................... 4
1.3 General safety information .................................... 4
1.4 Regulations (directives, laws, standards) .............. 6
1.5 List of relevant standards for Great Britain and
Ireland.................................................................... 6
2 Guarantee and Customer Service...................... 7
3 Technical data...................................................... 8
4 Notes on the documentation ............................ 11
5 Product description........................................... 12
5.1 CE marking .......................................................... 12
5.2 Benchmark........................................................... 12
5.3 Information on the data plate............................... 12
5.4 Functional elements: Combi boiler ...................... 13
5.5 Safety Devices..................................................... 13
6 Set-up.................................................................. 14
6.1 Unpacking the product......................................... 14
6.2 Checking the scope of delivery............................ 14
6.3 Dimensions .......................................................... 14
6.4 Installation site ..................................................... 15
6.5 Minimum clearances............................................ 15
6.6 Compartment Ventilation ..................................... 15
6.7 Air/flue pipe.......................................................... 15
6.8 Using the mounting template............................... 20
6.9 Wall-mounting the product................................... 20
6.10 Removing/installing the front casing.................... 21
6.11 Removing/installing the side section ................... 21
7 Installation.......................................................... 22
7.1 Preparing for installation...................................... 22
7.2 Flushing the heating installation for the first
time ("cold") ......................................................... 22
7.3 Checking the gas meter....................................... 22
7.4 Checking the gas flow rate .................................. 22
7.5 Gas and water connections ................................. 22
7.6 Connecting the drain pipework for the
expansion relief valve .......................................... 23
7.7 Connecting the condensate discharge pipe ........ 24
7.8 Flue installation.................................................... 26
7.9 Electrical installation ............................................ 26
8 Operation............................................................ 28
8.1 Using diagnostics codes...................................... 28
8.2 Displaying the status codes................................. 28
8.3 Using check programmes.................................... 28
9 Start-up ............................................................... 29
9.1 Carrying out the initial start-up............................. 29
9.2 Heating water supply in the sealed heating
system ................................................................. 29
9.3 Checking and treating the heating water/filling
and supplementary water .................................... 29
9.4 Filling the condensate siphon .............................. 30
9.5 Checking the gas type ......................................... 31
9.6 Checking the factory setting ................................ 31
9.7 Avoiding danger arising from insufficient water
pressure............................................................... 31
9.8 Switching on the product ..................................... 31
9.9 Filling and purging the heating installation .......... 31
9.10 Filling the domestic hot water circuit.................... 31
9.11 Checking the gas setting ..................................... 32
9.12 Thoroughly flushing the heating installation
("hot")................................................................... 33
9.13 Checking leak-tightness ...................................... 33
10 Adapting the unit to the installation ................ 35
10.1 Setting the burner anti-cycling time ..................... 35
10.2 Setting the pump output....................................... 35
10.3 Setting the bypass valve...................................... 35
10.4 Setting the domestic hot water temperature........ 36
11 Handing over to the end user........................... 36
12 Inspection and maintenance ............................ 37
12.1 Using original seals.............................................. 37
12.2 Observing inspection and maintenance
intervals ............................................................... 37
12.3 Procuring spare parts .......................................... 37
12.4 Checking the CO₂content ................................... 37
12.5 Removing the gas-air mixture unit....................... 37
12.6 Cleaning the heat exchanger............................... 38
12.7 Checking the burner ............................................ 38
12.8 Checking the ignition electrode ........................... 38
12.9 Cleaning the condensate siphon ......................... 38
12.10 Cleaning the strainer in the cold water inlet......... 39
12.11 Cleaning the heating filter.................................... 39
12.12 Installing the gas-air mixture unit......................... 39
12.13 Draining the product ............................................ 39
12.14 Checking the pre-charge pressure of the
expansion vessel ................................................. 39
12.15 Completing inspection and maintenance work .... 39
12.16 Checking the product for leak-tightness .............. 39
13 Troubleshooting ................................................ 40
13.1 Eliminating faults.................................................. 40
13.2 Calling up the fault memory................................. 40
13.3 Deleting the fault memory.................................... 40
13.4 Resetting parameters to factory settings ............. 40
13.5 Preparing the repair work .................................... 40
13.6 Replacing defective components......................... 40
13.7 Checking the product for leak-tightness .............. 43
14 Decommissioning the product......................... 44
15 Recycling and disposal..................................... 44
Appendix ............................................................................ 45
A Inspection and maintenance work................... 45
B Check programmes –Overview ....................... 46
C Overview of diagnostics codes........................ 47
D Status codes –Overview .................................. 50
E Overview of fault codes .................................... 51
F Wiring diagram: Combi boiler .......................... 54
G Wiring diagram: Combi boiler (35 kW) ............ 55
H Commissioning Checklist................................. 56

Contents
0020300875_01 Energy7Installation and maintenance instructions 3
I Pipe lengths for the air/flue pipe...................... 60
I.1 Length of the C13 type air/flue pipe..................... 60
I.2 Length of the C33 type air/flue pipe..................... 60
I.3 Length of the C43 type air/flue pipe..................... 60
Index ................................................................................... 61

1 Safety
4Installation and maintenance instructions Energy70020300875_01
1 Safety
1.1 Intended use
The product is intended as a heat generator
for sealed heating installations and for do-
mestic hot water generation.
Improper use of any kind is prohibited.
Intended use also includes the following:
–use of the product only in mobile homes
that are made, transported once and per-
manently situated in Great Britain and Ire-
land. After the transportation of the mo-
bile home to its destination the complete
product must be checked for leak-tightness
again
–validity of the product only for Great Britain
and Ireland and for the gas types in Great
Britain and Ireland as listed on the data
plate
–Installing and operating the product only
in conjunction with accessories for the
air/flue pipe which are listed in the other
applicable documents and comply with the
type of unit
–Using the product while observing the ac-
companying operating, installation and
maintenance instructions for the product
along with all other components of the in-
stallation
–Installing and setting up the product while
observing the product and system ap-
proval
–Observing all inspection and maintenance
conditions listed in the instructions
–Installing while observing the IP code
The following is classed as improper use:
–Using the product in vehicles, such as mo-
bile homes or caravans. Units that are not
classed as vehicles are those that are in-
stalled in a fixed and permanent location
(known as "fixed installation").
–Any direct use in industrial or commercial
processes
–Any use other than those described in
these instructions and any use that goes
beyond what is described here
1.2 Qualification
The person carrying out the work described
here must have completed professional train-
ing. The competent person must demon-
strably have all of the knowledge, skills and
capabilities that are required in order to carry
out the work mentioned below.
The following work must only be carried out
by competent persons who are sufficiently
qualified to do so:
–Set-up
–Dismantling
–Installation
–Start-up
–Inspection and maintenance
–Repair
–Decommissioning
▶Proceed in accordance with current tech-
nology.
▶Use the correct tool.
The above-mentioned work must always only
be carried out by persons with sufficient qual-
ifications.
This product can be used by children over
eight years old and also by persons with lim-
ited physical, sensory or mental capabilities
or insufficient experience and/or knowledge if
they are supervised or have been provided
with instructions on how to safely use the
product, and they understand the risks res-
ulting from using the product. Children must
not play with the product. Cleaning and user
maintenance work must not be carried out by
children unless they are supervised.
1.3 General safety information
The following sections convey important
safety information. It is essential to read and
observe this information in order to prevent
risk of death, risk of injury, material damage
or environmental damage.
1.3.1 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.

Safety 1
0020300875_01 Energy7Installation and maintenance instructions 5
▶Do not use naked flames (e.g. lighters,
matches).
▶Do not smoke.
▶Do not use any electrical switches, mains
plugs, doorbells, telephones or other com-
munication 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 immediately and ensure
that others do not enter the building.
▶Notify the gas supply company or
the Emergency Service Provider
[phone] by telephone once you
are outside of the building.
1.3.2 Flue gas
Flue gases may cause poisoning, while hot
flue gases may also cause burns. Flue gases
must therefore never be allowed to escape
uncontrollably.
What to do if you smell flue gas in the prop-
erty:
▶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.
To prevent flue gas exit:
▶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.
▶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.
To ensure that the seals are not damaged:
▶Instead of grease, use only water or com-
mercially available soft soap to aid installa-
tion.
1.3.3 Air supply
Unsuitable or insufficient combustion and
room air may lead to material damage, but
also to life-threatening situations.
To ensure that the combustion air supply is
sufficient during open-flued operation:
▶Ensure that the air supply to the product's
installation room is permanently unobstruc-
ted and sufficient in accordance with the
relevant ventilation requirements. This also
applies, in particular, for cupboard installa-
tions.
To prevent corrosion on the product and in
the flue system:
▶Ensure that the combustion air supply is
free from sprays, solvents, chlorinated
cleaning agents, paint, adhesives, am-
monia compounds, dust or similar sub-
stances.
▶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.
1.3.4 Electricity
The power supply terminals L and N remain
live even if the unit main switch is switched
off.
To prevent electric shocks, proceed as fol-
lows before working on the product:
▶Disconnect the product from the power
supply by switching off all power supplies
at all poles (electrical partition with a con-
tact gap of at least 3 mm, e.g. fuse or cir-
cuit breaker) or remove the mains plug (if
present).
▶Secure against being switched back on
again.
▶Wait at least three minutes until the con-
densers have discharged.
▶Check that there is no voltage.
1.3.5 Weight
To prevent injuries when transporting the
product:

1 Safety
6Installation and maintenance instructions Energy70020300875_01
▶Make sure that the product is transported
by at least two people.
1.3.6 Explosive and flammable substances
To prevent explosions and fire:
▶Do not use the product in storage rooms
that contain explosive or flammable sub-
stances (such as petrol, paper or paint).
1.3.7 High temperatures
To prevent burns:
▶Only carry out work on components once
they have cooled down.
To prevent material damage that is caused
by heat transfer:
▶Only solder connectors if the connectors
are not yet screwed to the service valves.
1.3.8 Heating water
Both unsuitable heating water and air in the
heating water may cause material damage to
the product and in the heat generator circuit.
▶Check the quality of the heating water.
(→Page 29)
▶If you use non-diffusion-tight plastic pipes
in the heating installation, ensure that no
air gets into the heat generator circuit.
1.3.9 Neutralisation device
To prevent contamination of the waste water:
▶Check whether a neutralising unit must
be installed in accordance with national
regulations.
▶Observe local regulations on neutralising
condensate.
1.3.10 Safety devices
▶Install the necessary safety devices in the
installation.
1.3.11 Risk of death from escaping flue gas
If you operate the product with an empty con-
densate trap / siphon, then flue gas may es-
cape into the room air.
▶In order to operate the product, ensure that
the condensate trap / siphon is always full.
1.4 Regulations (directives, laws,
standards)
▶Observe the national regulations, stand-
ards, directives, ordinances and laws.
1.5 List of relevant standards for Great
Britain and Ireland
▶You can find a list of relevant standards at
https://www.glow-worm.co.uk/standards.

Guarantee and Customer Service 2
0020300875_01 Energy7Installation and maintenance instructions 7
2 Guarantee and Customer Service
Guarantee Registration
Thank you for installing a new Glow-worm appliance in your home.
Glow-worm appliances are manufactured to the very highest standard so we are pleased to offer
our customers a comprehensive guarantee.
To maintain your guarantee, the boiler must be serviced annually by a competent person who
holds the required qualifications in accordance with the rules in force of the country where the
product is installed and in accordance with the manufactures recommendations.
We recommend you complete your guarantee registration as soon as possible.
Sales Support:
Telephone: [phone]
Technical Enquiries:
Telephone: [phone]
Email: [email protected]
General Enquiries:
Telephone: [phone]
Training Enquiries:
Telephone: [phone]
Email: [email protected]
Spares Enquiries:
Telephone: [phone]
To register your Glow-worm appliance visit:
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.
https://self-service.glow-worm.co.uk/warranty-registration

3 Technical data
8Installation and maintenance instructions Energy70020300875_01
3 Technical data
Technical data –General
Energy7 25c ‑A
(H‑GB)
Energy7 30c ‑A
(H‑GB)
Energy7 35c ‑A
(H‑GB)
Gas category I2H I2H I2H
Diameter of the gas pipe 1/2 inch 1/2 inch 1/2 inch
Diameter of the heating connec-
tions
3/4 inch 3/4 inch 3/4 inch
Expansion relief valve connection
pipe (min.)
15 mm 15 mm 15 mm
Condensate discharge pipe (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)
Gas flow at P max. –domestic 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 flow rate in heating
mode at P min.
2.34 g/s 2.80 g/s 3.30 g/s
Flue gas mass flow rate in heating
mode at P max.
8.3 g/s 11.5 g/s 11.6 g/s
Flue gas mass flow rate in do-
mestic hot water 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 domestic
hot water mode
69 ℃68 ℃75 ℃
Flue gas temperature when over-
heating
105 ℃95 ℃104 ℃
Released system types C13, C33, C43,
C53
C13, C33, C43,
C53
C13, C33, C43,
C53
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
mode (30%) at 40/30 °C
108.5 % 108.5 % 108.5 %
NOx class 6 6 6
Product dimensions, width 390 mm 390 mm 390 mm
Product dimensions, depth 280 mm 280 mm 280 mm
Product dimensions, height 702 mm 702 mm 702 mm
Net weight 32 kg 33 kg 33 kg
Weight when filled with water 36 kg 38 kg 38 kg
Technical data –G20 power/load G20
The lowest nominal heat output may be higher than the value in the technical data, depending on the design of the installa-
tion and the current operating mode.

Technical data 3
0020300875_01 Energy7Installation and maintenance instructions 9
Energy7 25c ‑A
(H‑GB)
Energy7 30c ‑A
(H‑GB)
Energy7 35c ‑A
(H‑GB)
Maximum heat output 18 kW 25 kW 25 kW
Effective output range (P) at
40/30 °C
5.4 to 19.5 kW 6.5 to 27.0 kW 7.6 to 27.2 kW
Effective output range (P) at
50/30 °C
5.3 to 19.1 kW 6.3 to 26.5 kW 7.5 to 26.7 kW
Effective output range (P) at
80/60 °C
5.1 to 18.2 kW 6.1 to 25.2 kW 7.2 to 25.5 kW
Domestic hot water heat output
(P)
5.0 to 25.2 kW 6.0 to 30.0 kW 7.1 to 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 –domestic
hot water (Q max.)
25.7 kW 30.6 kW 35.7 kW
Minimum heat input –domestic
hot water (Q min.)
5.1 kW 6.1 kW 7.2 kW
Technical data –Heating
Energy7 25c ‑A
(H‑GB)
Energy7 30c ‑A
(H‑GB)
Energy7 35c ‑A
(H‑GB)
Max. flow temperature adjustment
range (default setting: 75 °C)
10 to 80 ℃10 to 80 ℃10 to 80 ℃
Maximum permissible pressure 0.25 MPa
(2.50 bar)
0.25 MPa
(2.50 bar)
0.25 MPa
(2.50 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
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 –Domestic hot water
Energy7 25c ‑A
(H‑GB)
Energy7 30c ‑A
(H‑GB)
Energy7 35c ‑A
(H‑GB)
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 to 60 ℃35 to 60 ℃35 to 60 ℃
Flow rate limiter 8.0 l/min 10.0 l/min 12.0 l/min
Technical data –Electrics
Energy7 25c ‑A
(H‑GB)
Energy7 30c ‑A
(H‑GB)
Energy7 35c ‑A
(H‑GB)
Electrical 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 consump-
tion 66 W 75 W 60 W

3 Technical data
10 Installation and maintenance instructions Energy70020300875_01
Energy7 25c ‑A
(H‑GB)
Energy7 30c ‑A
(H‑GB)
Energy7 35c ‑A
(H‑GB)
Standby electrical power con-
sumption 2 W 2 W 3 W
IP rating IPX4D IPX4D IPX4D

Notes on the documentation 4
0020300875_01 Energy7Installation and maintenance instructions 11
4 Notes on the documentation
▶Always observe all operating instructions enclosed with
the installation components.
▶Store these instructions and all other applicable docu-
ments for further use.
These instructions apply only to:
Product article number
Article number 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

5 Product description
12 Installation and maintenance instructions Energy70020300875_01
5 Product description
5.1 CE marking
The CE marking shows that the products comply with the
basic requirements of the applicable directives as stated on
the declaration of conformity.
The declaration of conformity can be viewed at the manufac-
turer's site.
5.2 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 Regu-
lations. The Benchmark Checklist can be used to demon-
strate compliance with Building Regulations and should be
provided to the customer for future reference.
Installers are required to carry out installation, commission-
ing 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
5.3 Information on the data plate
The data plate is mounted on the underside of the product at
the factory.
The data plate keeps record of the country in which the
product is to be installed.
Information on the
data plate
Meaning
Barcode with serial number
Information on the
data plate
Meaning
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 techno-
logy
Efficiency class of the boiler in accord-
ance 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 domestic hot
water mode
V / Hz Electrical connection
W Max. electrical power consumption
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
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

Product description 5
0020300875_01 Energy7Installation and maintenance instructions 13
5.4 Functional elements: Combi boiler
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 pipe
6 Pressure sensor
7 Flue gas analysis point
(for the rear flue)
8 Ignition transformer
9 Gas valve assembly
10 Air intake pipe
11 Fan
12 Supply air test point (for
the top flue)
13 Flue gas analysis point
(for the top flue)
14 Primary heat exchanger
15 Heating expansion
vessel
16 Purging hose
17 Volume flow sensor
18 Heating pump
19 Bypass
20 3-port motorised valve
5.5 Safety Devices
5.5.1 Electrical Supply Failure
The boiler will not work without an electrical supply. Normal
operation of the boiler should resume when the electrical
supply is restored.
Reset any external controls, to resume normal operation of
the central heating.
If the boiler does not resume normal operation press the
reset button. If the boiler does not resume normal operation
after this call your Installation/Servicing company or Vaillant
service.
5.5.2 Overheating Safety
The boiler software is designed to recognise the potential for
an overheat lockout and will shutdown before this happens.
To restart the boiler, press the reset button on the boiler
interface.
If the boiler fails to resume normal operation and all external
controls are calling for heat, then call your Installation/ Servi-
cing company or Vaillant service.
5.5.3 Frost protection
The appliance has a built in frost protection device that pro-
tects the boiler from freezing. With the gas and electric sup-
plies ON and irrespective of any room thermostat setting, the
frost protection device will operate the pump when the tem-
perature of the boiler water falls below 12 °C.
A timer is used so that the temperature can be checked peri-
odically. After 10 minutes the pump will be stopped if the
temperature is higher than 10 °C or has already reached
35 °C. The burner will activate if the boiler temperature does
not reach 10 °C after 30 minutes or at any time if the temper-
ature drops to 5 °C.
The burner will switch off when the temperature reaches
35 °C.
5.5.4 Condensate Drain Blockage
As a safety feature the boiler will stop working if the con-
densate drain becomes blocked. During freezing conditions
this may be due to the forming of ice in the condense drain
external to the house. Release an ice blockage by the use
of warm cloths on the pipe. After pressing reset the boiler
should restart.

6 Set-up
14 Installation and maintenance instructions Energy70020300875_01
6 Set-up
6.1 Unpacking the product
1. Remove the product from its box.
2. Remove the protective film from all of the product's
components.
6.2 Checking the scope of delivery
▶Check that the scope of delivery is complete and intact.
Number Designation
1 Heat generator
1 Unit mounting bracket
1Flexible condensate discharge pipe
6 3/4" seals
4 1/2" seals
1 Service valve
1 Gas stopcock
1 Filling device
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 drain pipe
1 Mounting template
1 Enclosed documentation
6.3 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 Domestic hot water
connection
3 Gas connection
4 Cold water connection
5 Heating return
6 Rear air/flue pipe con-
nection
7 Top air/flue pipe con-
nection

Set-up 6
0020300875_01 Energy7Installation and maintenance instructions 15
6.4 Installation site
This boiler is not suitable for outdoor installation. This boiler
may be installed in any room. However if the boiler is being
installed in a room containing a bath or shower it must only
be installed in zones 2 or 3. In GB this is the current I.E.E.
WIRING REGULATIONS and BUILDING REGULATIONS. In
IE reference should be made to the current edition of I.S.813
“Domestic Gas Installations” and the current ETCI rules.
If the boiler is to be installed in a timber frame building it
should be fitted in accordance with the current version of the
Institute of Gas Engineers document IGE/UP/7. If in doubt
seek advice from local gas undertaking or the manufacturer.
6.5 Minimum clearances
CC
A
B
D
Minimum clearance
A 150 mm (top air/flue connection)
20 mm (rear air/flue connection)
B 150 mm
C 5 mm
(70 mm if the side sec-
tions ought to be removed)
D 600 mm
The boiler and flue are suitable for installation onto and
through combustible materials provided that:
1. Minimum 5 mm clearance is maintained around the
circumference of the flue (air intake).
2. The combustible surface and fixings are suitable for
supporting the load.
3. The minimum clearances from the boiler case are main-
tained.
6.6 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.
6.7 Air/flue pipe
6.7.1 Regulation
Different flue outlet configurations can be carried out.
–Consult the installation manual for air/flue gas systems
for more information about the other possibilities and
associated accessories.
Minimum fall
44 mm/m
–Standard flue terminal kits have an in-built fall back to
the boiler to drain the condensate. These can be fitted
level between the appliance and the termination position.
All other extended flues must have a fall of at least 44
mm/m.
The maximum length of the flue outlet is defined according to
its type (for example C13).
–Whatever the kind of flue system chosen, observe the
minimum distances to position the flue terminals.
–To install the flue, refer to the separate flue instruction
supplied with your appliance.
–Explain these requirements to the user of the appliance.
In GB the minimum acceptable siting dimensions for the
terminal from obstructions, other terminals and ventilation
openings are shown in diagram overleaf.
In IE the minimum distances for flue terminal positioning
must be those detailed in I.S. 813 “Domestic Gas Installa-
tions”.
The terminal must be exposed to the external air, allowing
free passage of air across it at all times.
Being a condensing boiler some pluming may occur from
the flue outlet. This should be taken into consideration when
selecting the position for the terminal.
6.7.2 Terminal protection

6 Set-up
16 Installation and maintenance instructions Energy70020300875_01
A terminal guard is required if persons could come into con-
tact with the terminal or the terminal could be subject to dam-
age.
If a terminal guard is required, it must be positioned to
provide minimum of 50 mm clearance from any part of the
terminal and be central over the terminal.
The guard should be similar to that shown in the figure.

Set-up 6
0020300875_01 Energy7Installation and maintenance instructions 17
6.7.3 Position of the air/flue terminal
J
J
N
Q
S
S
P
UB
Boundary
G
D
J
JR
VM
T
G
C
W
E
F
L
A
K
S
P
S
F
X
A
Y
Boundary
Z
H
Aa
S
Z
Ba
6.7.3.1 Positioning the terminal of a fan-supported flue system
Installation site Dimensions
AAdjacent to a boundary. 300 mm
B1) The dimension below eaves, balconies and car ports can be reduced to this value, as long as the flue terminal is
extended to clear any overhang. External flue joints must be sealed with a suitable silicon sealant. 25 mm
C Between a vertical flue terminal and a window or dormer window on a roof. 1,500 mm
D Between terminals facing each other. 1,200 mm
E Vertical flue clearance, adjacent to a boundary line. 300 mm
F2) Distance to a boundary line, unless it will cause a nuisance. BS 5440:Part 1 recommends that care is taken
when siting terminal in relation to boundary lines. 600 mm
G Minimum clearance from a skylight to a vertical flue or to another vertical flue. Min. 300 mm
HVertical flue clearance, to noncombustible building material.
Vertical flue clearance to combustible building material.
500 mm
1,500 mm
J Above, below and either side of an opening door, air vent or opening window. 300 mm
K Diagonally to an opening door, air vent or opening window. 600 mm
L2) To an internal or external corner. 200 mm
MBelow a Velux window.
Above or to either side of the Velux window.
2,000 mm
600 mm
NFrom a pitched roof.
In regions with heavy snowfall.
400 mm
500 mm
P From vertical drain pipes and soil pipes. 25 mm
1) There should be no ventilation/opening in the eaves within 300 mm distance of the terminal.
2) These dimensions comply with the building regulations, but they may need to be increased to avoid wall
staining and nuisance from pluming depending on site conditions.
–Terminals must be positioned so to avoid combustion products entering the building.
–Support the flue at approximately one metre intervals and at a change of direction, use suitable brackets and
fixings.
–Installations in car ports are not recommended.
–The flue cannot be lower than 1 metre from the top of a lightwell due to the build up of combustion products.
–Dimensions from a flue terminal to a fanned air inlet to be determined by the ventilation equipment.

6 Set-up
18 Installation and maintenance instructions Energy70020300875_01
Installation site Dimensions
QBelow eaves.
Below gutters, pipe and drains.
200 mm
75 mm
RThe dimension below eaves, balconies and car ports can be reduced to this value, as long as the flue terminal is
extended to clear any overhang. External flue joints must be sealed with suitable silicon sealant. 25 mm
S Above adjacent ground or balcony. 300 mm
T2) Distance to a surface facing a terminal, unless it will cause a nuisance. BS 5440: Part 1 recommends that care
is taken when siting terminals in relation to surfaces facing a terminal.
600 mm
U Clearance alongside another terminal. 300 mm
V Above roof level. 300 mm
W Minimum to vertical structure on roof, roof vent. Min. 300 mm
X Minimum to opening in adjacent building. Min.
2000 mm
Y Minimum at an angle to a boundary which is not less than 300 mm to the terminal Min. 600 mm
Z Minimum measured to the nearest corner of the OPEN window Min. 600 mm
Aa No more than this value above ridge. Max.
300 mm
Ba Not less than this value below the opening window Min. 300 mm
1) There should be no ventilation/opening in the eaves within 300 mm distance of the terminal.
2) These dimensions comply with the building regulations, but they may need to be increased to avoid wall
staining and nuisance from pluming depending on site conditions.
–Terminals must be positioned so to avoid combustion products entering the building.
–Support the flue at approximately one metre intervals and at a change of direction, use suitable brackets and
fixings.
–Installations in car ports are not recommended.
–The flue cannot be lower than 1 metre from the top of a lightwell due to the build up of combustion products.
–Dimensions from a flue terminal to a fanned air inlet to be determined by the ventilation equipment.
6.7.3.2 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.
Dimensions B and R:
These clearances may be reduced to 25 mm without affecting the performance of the boiler. In order to ensure that the con-
densate 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
You can use a plume management kit to enable the termination point to be positioned and directed away from the building
fabric.

Set-up 6
0020300875_01 Energy7Installation and maintenance instructions 19
6.7.4 Flue Configuration Description
6.7.4.1 Horizontal Concentric Flue ⌀60/100 mm or
⌀80/125 mm (C13 type installation)
1
1 Gasket (fitted)
Note
If the terminal is at less than 1.80 m from the
ground, you must install a terminal protection kit.
Type Max. length (L) Height (H)
60/100 diameter 10 m 76 mm
80/125 diameter 25 m 169 mm
Each time an additional 90° bend is necessary (or 2 at 45°),
the length (L) must be reduced by 1 m.
6.7.4.2 Vertical Concentric Flue ⌀60/100 mm or
⌀80/125 mm (C33 type installation)
Consult the separate installation manual for air/flue gas sys-
tems supplied with your appliance for all possibilities and as-
sociated accessories and how to install the flue system.

6 Set-up
20 Installation and maintenance instructions Energy70020300875_01
6.7.4.3 Multiple boiler chimney Flue ⌀60/100 mm
(C43 type installation)
6.7.4.3.1 Multiple Boiler Chimney Flue
A
B
L
4
5
1
2
3
1 Pressure balancing
system
2 Air-inlet pipe
3 Collector pipe
4 Boiler
5 Inspection hatch
A Final storey
B Ground floor
Note
The flue connecting from the appliance to the flue
system must be supplied from the manufacturer of
the boiler.
C43 flue systems must not be a 'pressurised sys-
tem' but act under natural draught principles.
C43 type flue systems must have their own con-
densate drain fitted and not allow condensate to
mix into other appliances.
The flue length must be calculated and installed according
to the relevant standards EN 13384-1 and 2 (C43 flue sys-
tems only) with reference to the table below and the manu-
facturer's instructions supplied. The appliance maximum flue
length must be included when calculating the overall design
of the flue system.
Max Flue Length C43 (→Page 20)
Each time an additional 90° bend is necessary (or 2 at 45°),
the length (L) must be reduced by 1 m.
Type Max. length (L)
60/100 diameter 10 m
6.8 Using the mounting template
▶Use the mounting template to ascertain the locations at
which you need to drill holes.
6.9 Wall-mounting the product
Note
If you are using the rear air/flue connection, in-
stall the air/flue pipe before you wall-mount the
product.
1. Check the load-bearing capacity of the wall.
2. Note the total weight of the product.
3. Only use fixing material that is permitted for the wall.
4. If required, ensure that mounting apparatus on-site has
sufficient load-bearing capacity.
5. Wall-mount the product as described.
6. Mount the unit mounting bracket on the wall.
7. Hook the product onto the unit mounting bracket.