7215 3400 - 02/2006 GB (EN)
For the user
Users manual
Gas wall hung Boiler condensing
Buderus 500 - 24/S
W
Please read thoroughly before operating the unit
Introduction
Please read these instructions and follow them carefully for a safe and
economical use of your
system boiler.
Important general
instructions for use
This device should only be
used for its intended purpose
and in accordance with the
regulations.
It is a requirement and in
your own interest, and that of
safety that this boiler must be
installed by a CORGI registered installer, in accordance
with the relevant requirements of the current Gas
Safety (Installation and Use)
Regulations,
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The Building Regulations, current I.E.E. Wiring Regulations
and the relevant British Standard Codes of Practise.
The device may only be used in combination with the units,
accessories and spare parts listed in the installation and
maintenance instructions.
Other combinations of units, accessories and consumables
are only to be used if they completely fulfil the specifications
involved, and if system performance and safety are not
affected in any way.
Subject to technical modifications
As a result of our policy of constant development, there may
be small differences with respect to illustrations, functional
steps and technical data.
Cleaning
For normal cleaning simply dust with a dry cloth. To remove
stubborn marks and stains, wipe with a damp cloth and soap
and finish off with a dry cloth.
DO NOT use abrasive cleaning materials.
G. C. Aplliance No. :
Buderus 500-24/S : 41-110-24
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Contents
1
2
3
4
5
6
7
8
9
10
Safety precautions . . . . . . . . . . . . . . . . . . . 6
Installation area / boiler room . . . . . . . . . . 7
Working in the heating system . . . . . . . . . 8
Functions of the system and operating
instructions . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance intervals . . . . . . . . . . . . . . . . 9
Conversion to LPG . . . . . . . . . . . . . . . . . . 10
Abbreviations . . . . . . . . . . . . . . . . . . . . . . 11
Permanent clearances . . . . . . . . . . . . . . . 12
DBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Initial start-up . . . . . . . . . . . . . . . . . . . . . . 18
10.1
10.1.1
10.1.2
10.1.3
10.2
Preparing for operation. . . . . . . . . . . . . . . . . . . . .
Check water pressure . . . . . . . . . . . . . . . . . . . . .
Topping up the heating system . . . . . . . . . . . . . .
Temperature-setting adjustments. . . . . . . . . . . . .
Operational and fault codes . . . . . . . . . . . . . . . . .
18
18
19
22
25
11
Taking the system out of service . . . . . . 26
11.1
Draining the system in case of frost . . . . . . . . . . . 27
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Preface
Dear Customer,
Your Buderus 500 Series wall-mounted condensing gas
system boiler has been designed and built in accordance with
state-of-the-art technological standards and the recognised
safety rules. Special focus has been placed on operator
convenience in this respect.
Carefully read the safety instructions and operating manual to
ensure safe, economic and ecologically beneficial use of the
unit.
Due to the high efficiency of the boiler a plume of water vapour
may form at the terminal during operation. This is normal.
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1
1
Safety precautions
Safety precautions
A
DANGER! If you smell gas:
1) No naked flames ! Do not smoke !
2) Avoid sparks ! Do not operate electrical switches. Do not use the telephone, plug-in devices
of any kind or the doorbell!
3) Shut off the main gas supply!
4) Open windows and doors!
5) Warn building occupants and evacuate the
building!
6) Call the gas distributor (under 'GAS' in the
telephone directory) from outside the building!
I
NOTE
In the event of any other type of incident, shut off the
main gas supply and electric supply to the appliance
and seek assistance from a CORGI registered
engineer.
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Installation area / boiler room
2
A
A
I
2
Installation area / boiler room
DANGER!
The air intake and outlet openings must not be reduced
in size or closed.
DANGER!
Do not store or use inflammable materials or liquids
near the heating boiler.
NOTE
To prevent the boiler from being damaged, care must
be taken not to contaminate the combustion air with
halogenated hydrocarbons (e. g. contained in aerosol
sprays, solvents, detergents, paints, and adhesives), or
with high quantities of dust. The room in which the
boiler is installed must be frost-proof and be well
ventilated.
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3
3
Working in the heating system
Working in the heating system
A
DANGER!
Only a CORGI registered Engineer is to be entrusted
with the installation of this boiler, the gas supply and the
flue connection. Commissioning, Servicing and any
Repairs must be carried out by a competent person i.e.:
a CORGI Registered Engineer.
All CORGI Registered Installers carry a CORGI
identification card and have a registration number.
Both should be recorded in your boiler logbook.
You can check if your installer/Engineer is registered by
telephoning 01256 372300 or by writing to:
CORGI, 1 Elmwood, Chineham Business Park,
Crockford Lane, Basingstoke. RG24 8WG.
I
NOTE
The heating boiler is designed exclusively for heating
water as part of a central heating system and/or
hot-water system.
It is recommended to enter into a service contract with a
specialist company.
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Functions of the system and operating instructions
4
4
Functions of the system and operating
instructions
The installer should familiarize the user with the functions and
operation of the heating system and ensure that a complete
set of technical documentation is supplied.
5
Maintenance intervals
For optimum, long-term reliable functioning of the heating
boiler, and in order to be able to claim under the terms of the
manufacturer's warranty, the heating boiler must be inspected
and maintained at least once a year (under normal operating
conditions) by an officially recognized installation and service
engineer. The term "normal operating conditions" means that
the heating boiler is used to provide central heating and/or hot
water to no more than one single-family dwelling.
In all other cases, the heating boiler must be inspected and
maintained by an officially recognised installation service
engineer every 2,500 burner operating hours.
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6
6
Conversion to LPG
Conversion to LPG
The boiler is suited for natural gas. To convert the boiler to
LPG you must contact a CORGI registered fitter.
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Abbreviations
7
7
Abbreviations
DBA = Control unit (Dedicated Burner Automat)
CH flow = Central heating flow
CH return = Central heating return
MCW = Mains Cold Water.
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8
8
Permanent clearances
Permanent clearances
8 mm
8 mm
21 mm
8 mm
21 mm
The boiler must be located in an area with the following
permanent clearances.
fig. 1
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Permanent clearances
I
8
NOTE
The permanent clearances do not change if a wall
spacing frame is used.
The installer or service engineer must be able to create
sufficient service clearences. These clearences should
have been considered at time of installation.
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9
DBA
9
DBA
4
5
3
6
2
7
1
fig. 2
14
DBA
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DBA
9
Key to fig. 2 :
item 1:
item 2:
item 3:
item 4:
mains switch
"reset" button
"service" button
display
item 5:
item 6:
item 7:
"menu" button
adjusting arrow up
adjusting arrow down
The boiler is equipped with a DBA. This is the internal control
of the boiler. The DBA is located behind the access panel.
The DBA allows you to operate the boiler and to make adjustments in its settings.
DBA overview:
1. Mains switch (see fig. 2).
Use this switch to turn the boiler on or off.
2. Reset button "B" (see fig. 2)
When a blinking code is in the display, it is possible to try and
restart the boiler by pressing this button.
I
NOTE
It is not possible to reset the boiler when there is no
fault code blinking in the display.
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9
DBA
3. Service Button "A" (see fig. 2)
Is used for servicing purposes only.
DO NOT use this button!
4. Display (see fig. 2)
The display visualizes settings, adjustments and fault codes
(see fig. 3).
fig. 3
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DBA display
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DBA
9
5. Menu button "E" (see fig. 2)
The menu button "E" allows you to scroll through the menu
items.
Pressing the E button once, the current DHW temperature (in
combination with an external hot water cylinder) setting is
displayed.
Pressing the E button again gives the current setting of
summer operation.
Pressing the E button once more gives the current CH flow
temperature setting.
6. and 7. Up "C" and Down "D" keys (see fig. 2)
These keys can be used for adjusting temperatures and
activating or de-activating certain summer operation.
The C key when pressed gives the current operating status of
the boiler.
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10
Initial start-up
10
Initial start-up
10.1
Preparing for operation
Please also note the user manual supplied with the
external time controls and thermostat.
10.1.1 Check water pressure
z Check the pressure gauge (fig. 4, item 3) located at the
bottom of the boiler for the current system pressure.
Optimum system pressure is 1.5 bar.
3
1
CH flow
fig. 4
18
2
GAS
CH return
Servicing valves
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Initial start-up
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10.1.2 Topping up the heating system
WARNING!
The wall-mounted condensing gas system boiler must
not be activated at this stage.
The system should be filled with untreated mains water.
z Turn off the boiler by setting the mains switch to "0" (fig. 5,
item 1).
z If necessary open the CH flow and CH return servicing
valves (fig. 4, item 1 and 2).
A
ON
OFF
1
fig. 5
DBA – Mains switch
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10
Initial start-up
stop
valve
external
MCW
supply
fig. 6
stop
valve
double
check
valve
filling
loop
CH
return
Filling loop
z Connect filling loop (accessory) (fig. 6).
z Open both stop valves (fig. 6).
z Fill the system to a pressure of approx. 1.5 bar
(fig. 4, item 3).
z Shut both stop valves.
z Disconnect the filling loop.
z Vent all radiators from air starting with the lowest radiator
and working your way up to the highest point.
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Initial start-up
10
z Check the pressure after venting. If the pressure has
dropped under 1.0 bar then top up the system as described
previously.
z Disconnect the filling loop and cap off.
I
NOTE
If there are frequent water losses, have the system
examined and repaired by a CORGI registered
installer. Have the inhibitor concentration checked
every year.
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10
Initial start-up
10.1.3 Temperature-setting adjustments
Setting the domestic hot water (DHW) temperature (in
combination with an external hot water cylinder)
z Press E button (see fig. 7, item 2) once then adjust the
DHW temperature to the desired temperature (40 °C 60 °C) using the C and D keys (fig. 7, item 1).
Factory setting is 48 °C.
Setting the boiler to summer operation
When you want to make sure that your boiler will not operate
for central heating in the summer then you can set the boiler
to summer operation. The boiler will then only operate for
DHW (in combination with an external hot water cylinder).
z Press the E button (see fig. 7, item 2) twice.
The current setting blinks.
z Use the C and D keys to adjust to desired setting.
K
Central heating is on.
L
Central heating is off (summer operation).
DHW is still available (in combination with an
external hot water cylinder).
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Initial start-up
10
1
2
3
fig. 7
I
DBA – Mains switch
NOTE
When summer operation is active then the boiler will
not operate for central heating until summer operation
has been deactivated.
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10
Initial start-up
Setting the flow temperature for CH
z Press E button (see fig. 7, item 2) three times then adjust
the flow temperature to the desired temperature (30 °C –
80 °C) using the C and D keys (see fig. 7, item 1).
Factory setting is 80 °C.
It is not possible to set the flow temperature when the boiler is
set to summer operation.
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Initial start-up
10.2
10
Operational and fault codes
Operating conditions and possible faults can be seen,
pressing the C key.
All codes not contained in table 1 should be noted down
separately. These are malfunctions that require the presence
of a CORGI installer.
Display after
pressing
service button "C"
Meaning
0A, 0C, 0E, 0H,
0L, 0U, 0Y
Boiler is ready
for operation
6A
Burner not
ignited
-H
Normal heating Maximum comfort when set at
mode
60 °C
=H
Normal hot
water mode
table 1
Rectification
Press Reset button “B“ (fig. 7,
item 3). If the burner fails to ignite
after several unblocking operations, consult a CORGI installer.
Operational and fault codes
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Notes
11
Taking the system out of service
z Push the mains power switch (fig. 5, item 1) to “0”.
z Close the gas service valve by turning it clockwise (fig. 8,
item 1).
1
1: Gas valve closed
fig. 8
2
2: Gas valve open
Gas service valve
Frost protection
The boiler has an automatic frost protection. When the CH
flow temperature drops below 7 °C then the boiler will start up.
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Notes
11.1
Draining the system in case of frost
It is not recommended, but if the boiler needs to be shut down
for a longer period of time, then it is necessary to drain the
system. Especially when there is a chance for frost conditions.
z Turn off the boiler by setting the mains power to "0" (fig. 5,
item 1).
z Close the gas valve (fig. 8, item 1).
fig. 9
Draining the system
z Drain the system at its lowest point using the stop valves or
radiator (see fig. 9). The automatic air vent at the system’s
highest point must be open.
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W
Customer Services
Technical Product Support
Tel: 0870 - 421 5933
Tel: 0870 - 421 5944
Sales Tel: 01905 752 640 Fax: 01905 456 445 / 455 394
Returns Tel: 01905 752 531 Fax: 01905 455 392
Spares Tel: 01905 752 576 Fax: 01905 754 620
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Buderus is a trading name of
BBT Thermotechnology UK Ltd.
721.534A - 4612 - 02/2006
Buderus
Cotswold Way, Warndon, Worcester, WR4 9SW
Telephone: 01905 - 752 936
Fax: 01905 - 753 130