Buderus 600 - 11R User guide

7212 2900 - 02/2006 GB (EN) For the installer
Please read thoroughly
Installation and servicing
instructions
Gas wall hung Boiler condensing
Buderus 600 - 11R / 19R / 24R

2 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Subject to technical modifications!
Constant development efforts may result in changes to illustrations, functional steps and technical data.
Updating the documentation
If you have suggestions for improvement or have found discrepancies, please do not hesitate to contact us.
The boiler meets the basic requirements of
the appropriate standards and directives.
Conformity has been substantiated by the
proper documents which - together with the
declaration of conformity - are filed with the
manufacturer.

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 3
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
Contents
1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.1 Technical specifications . . . . . . . . . . . . . . . . 13
1.2 Dimensions and connections . . . . . . . . . . . . 15
1.3 Boiler assembly - exploded view . . . . . . . . . 16
1.4 Items supplied with unit . . . . . . . . . . . . . . . . 17
1.5 Hanging the boiler . . . . . . . . . . . . . . . . . . . . 17
1.6 Pipe connections . . . . . . . . . . . . . . . . . . . . . 18
1.7 Flue Installation . . . . . . . . . . . . . . . . . . . . . . 21
1.8 Electrical connections . . . . . . . . . . . . . . . . . 27
1.9 External control connections . . . . . . . . . . . . 29
2 Commissioning . . . . . . . . . . . . . . . . . . . . . 30
2.1 Requirements. . . . . . . . . . . . . . . . . . . . . . . . 30
2.2 Preparing the boiler for operation . . . . . . . . 31
3 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.1 General directions . . . . . . . . . . . . . . . . . . . . 40
3.2 Preparing the boiler for inspection . . . . . . . . 40
4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 41
4.1 Clean the heat exchanger, burner and
condensate trap . . . . . . . . . . . . . . . . . . . . . . 41
5 Servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.1 Operating codes. . . . . . . . . . . . . . . . . . . . . . 46
5.2 Fault codes . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.3 Checking and replacing parts . . . . . . . . . . . 55
6 Conversion to another type of gas. . . . . . 63
7 Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7.1 Short list of spare parts . . . . . . . . . . . . . . . . 65
8 Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.1 Start-up report . . . . . . . . . . . . . . . . . . . . . . . 66
8.2 Inspection and maintenance reports . . . . . . 68
G. C. Aplliance No. :
Buderus 600 - 11R 41-110-21
Buderus 600 - 19R 41-110-22
Buderus 600 - 24R 41-110-23
Other manuals available for this boiler are:
– user manual.
Preface
These installation and servicing instructions apply to:
Buderus wall-mounted condensing gas boilers
600 - 11R / 19R / 24R.
Model: C13, C33, C53
Type: GB II2H3P 20 mbar, 37 mbar
In this document: NG = 2H-G20-20 mbar
LPG = 3P-G31-37 mbar
Fuse rating: 1.25 Ampere slow blow (on boiler)
Power rating: 230 VAC, 50 Hz, IPX4D
A fuse main supply of 3 amp required (BS. 1362).
The boiler consists of the following components:
– 600 : Gas condensing boiler
– 11, 19, 24 : Maximum output in kW for the different
models
– R : Regular boiler.
Important general instructions for use
Only use the boiler in accordance with its designated
use and the installation and servicing instructions.
Installation, maintenance and repair must be carried out
by competent service engineers (e.g. CORGI regis-
tered). Only use the boiler in conjunction with the acces-
sories and spare parts indicated in the installation and
servicing instructions. Other accessories and consuma-
bles may only be used if they are expressly provided for
the designated use and if system performance and
safety are not affected in any way.
The boiler is suitable for connection to fully pumped,
open vented or sealed water systems.
Adequate arrangements for completely draining the
system by provision of draining cocks must be provided
in the installation pipework.
Subject to technical modifications.
As a result of our policy of constant development, there
may be differences between illustrations, functional
steps and technical data.
BENCHMARK' Log Book
All Buderus gas fired boilers include an installation,
commissioning and service record log book. The details
of the log book will be required in the event of any
warranty work being requested.
Please complete the appropriate sections on completion
of the installation and commissioning.
REMEMBER: Please hand the log book back to the
user.

4 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Regulations and directives
It is a requirement that all gas appliances are installed
and serviced by a CORGI registered installer in accord-
ance with the regulations. Failure to install appliances
correctly could lead to prosecution. It is in your own
interest, and that of safety, to ensure the law is complied
with.
The installation must also be in accordance with the
latest I.E.E (BS.7671) Wiring Regulations, water regula-
tions, the building regulations and the Building Stand-
ards (Scotland) and any relevant requirements of the
local authority.
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, The Building Regulations, current
I.E.E. Wiring Regulations and the relevant British
Standard Codes of Practise.
Detailed recommendations are contained in the
following British Standard Codes of Practice:
BS. 5440:1Flues (for gas appliances of rated input not
exceeding 70 kW).
BS. 5440:2Ventilation (for gas appliances of rated input
not exceeding 70 kW).
BS. 5449 Forced circulation hot water systems.
BS. 5546 Installation of gas hot water supplies for
domestic purposes (2nd. family Gases).
BS. 6798 Installation of gas fired hot water boilers of
rated input not exceeding 60 kW.
BS. 6891 Low pressure installation pipes.
IGE/UP/1b Tightness testing and purging domestic
sized gas installations.
Health and & Safety Document No. 635.
The Electricity at Work Regulations, 1989.
The manufacturer's notes must not be taken, in any way,
as overriding statutory obligations.
The design and construction of the Buderus wall-
mounted condensing gas boiler 600 - 11R/19R/24R
conforms to the basic specifications listed in the
European directive governing gas-fired appliances
90/396/EEC, and with respect to EN 625, EN 483 and
EN 677.
Timber Framed Buildings
If the boiler is to be fitted in a timber framed building it
should be fitted in accordance with the Institute of Gas
Engineering document IGE/UP/7:1998.
Bathroom Installations
This appliance is rated IPX4D.
The boiler may be installed in any room or internal
space, although particular attention is drawn to the
requirements of the current IEE (BS.7671) Wiring Regu-
lations and, in Scotland, the electrical provisions of the
building regulations applicable in Scotland, with respect
to the installation of the boiler in a room or internal space
containing a bath or shower.
If the appliance is to be installed in a room containing a
bath or shower then, providing water jets are not going
to be used for cleaning purposes (as in communal
baths/showers), the appliance can be installed in
Zone 3, as detailed in BS.7671.
Compartment Installations
A compartment used to enclose the boiler should be
designed and constructed especially for this purpose.
An existing cupboard or compartment may be used,
provided that it is modified for the purpose.
In both cases, details of essential features of cupboard/
compartment design, including airing cupboard installa-
tion, are to conform to the following:
BS 6798 (No cupboard ventilation is required - see 'Air
Supply' for details).
NOTE
Observe the corresponding technical
rules and the building supervisory and
statutory regulations when installing and
operating the system.
WARNING!
WARNING!
Keep the burner-control unit housing
CLOSED when working on water-bearing
components.
NOTE
It is mandatory to inspect and service the
system once a year. This includes an
inspection of the entire system to see if it
is in full working order. Defects and faults
must be eliminated immediately.
NOTE
When instructions aren’t followed,
warranty expires.

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 5
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
It is not necessary to have a purpose-provided air vent
in the room or internal space in which the boiler is
installed. Neither is it necessary to ventilate a cupboard
or compartment in which the boiler is installed, due to
the low surface temperatures of the boiler casing during
operation; therefore the requirements of BS 6798,
Clause 12, and BS 5440:2 may be disregarded.
The permanent clearances required are:
in front: 8 mm
below: 21 mm
right side: 5 mm
left side: 5 mm
above: 21 mm
The position selected for installation MUST allow
adequate space for servicing in front of the boiler.
See table below:
in front: 350 mm
below: 50 mm
right side: 5 mm
left side: 5 mm
above: 200 mm
For the minimum clearances required for safety and
subsequent service, see the wall mounting template.
In addition, sufficient space may be required to allow
lifting access to the wall mounting plate.
Wall-mounted condensing gas boilers must only be
operated with the combustion air/flue gas systems espe-
cially devised and authorised for this type of boiler.
Observe the relevant standards, regulations and legisla-
tion of the country of final use.
The hydraulic resistance of the boilers is shown in the
graph below.
graph 1
CAUTION!
CAUTION!
Use this device for its intended purpose
only.
WARNING!
DANGER!
notes relating to the heating system
water.
Thoroughly flush the system before it is
filled with water. Use only untreated water
or water treatment product such as
Sentinal X100 to fill and top up the
system.
When using water treatment, only prod-
ucts suitable for use with Buderus heat
exchangers are permitted (e.g. Sentinel
X100). Your warranty is at risk if an incor-
rect water treatment product is used in
conjunction with this appliance.
For more information, contact Buderus
Product Support Department.
It is most important that the correct
concentration of the water treatment
product is maintained in accordance with
the manufacturer's instructions.
If the boiler is used in an existing system
any unsuitable additives MUST be
removed by thorough cleaning.
BS.7593:1992 details the steps neces-
sary to clean a domestic central heating
system.
In hard water areas, treatment to prevent
lime scale may be necessary - however,
the use of artificially softened water is
NOT permitted.
Under no circumstances should the boiler
be fired before the system has been
thoroughly flushed.
Do not use water softened in a salt
bedding exchanger.
Do not use anti-freeze or other additives.
The expansion vessel must be of
sufficient size.
When oxygen-permeable pipes are used
(e. g. for floor heating systems) the
system must be separated by means of
heat exchangers. Unsuitable heating
water promotes sludge formation and
corrosion. This may cause malfunctions
and damage in the heat exchanger.
This appliance is not suitable for gravity
central heating nor are they suitable for
the provision of gravity domestic hot
water.
The boiler must be vented.
Drain cocks must be located in accessible
positions, which permits the draining of
the entire system. They should be at least
½" BSP nominal size and be in accord-
ance with BS 2879.
0
50
100
150
200
250
300
350
0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 1,1 1,2 1,3
resistance (mbar)
resistance heat exchanger
flow (m /h)
3

6 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Safe handling of substances
Care should be taken when handling the boiler's insula-
tion, which can cause irritation to the skin.
No asbestos, mercury or CFCs are included in any part
of the boiler and its manufacture.
Open vent system requirements
The system should be vented directly off the boiler flow
pipe, as close to the boiler as possible. The cold feed
entry should be inverted and MUST be positioned
between the pump and the vent, and not more than
150 mm away from the vent connection.
There should be a minimum height, 450 mm, of open
vent above the tank water level. The vertical distance
between the highest point of the system and the
feed/expansion cistern water level MUST not be less
than 1000 mm. The pump must be fitted on the flow side
of the boiler.
A suitable pump is a domestic circulator capable of
providing a maximum 11 °C temperature differential
across the boiler with the whole of the heating circuit
open. With the minimum flow circuit allowed by the
controls the differential must not exceed 25 °C
(see also the graph on page 5).
The vertical distance between the pump and
feed/expansion cistern MUST comply with the pump
manufacturer’s minimum requirements, to avoid cavita-
tion. Should these conditions not apply either lower the
pump position or raise the tank above the minimum
requirements specified by Buderus. The isolation valves
should be fitted as close to the pump as possible.
The system will work more efficiently when the flow
temperature is as low as possible.
NOTE:
notes relating to domestic hot water.
The boiler must not be used for direct hot
water supply.
The hot water storage cylinder must be of
the indirect type.
Primatic cylinders are not recommended
and must not be used on sealed systems.
The hot water cylinder and ancillary
pipework, not forming part of the useful
heating surface, should be lagged to
prevent heat loss and any possible
freezing - particularly where pipes run
through roof spaces and ventilated under-
floor spaces.
The domestic hot water service must be in
accordance with BS 5546 and BS 6700.
fig. 1 Open vent system
22 mm
open vent
Water
level
(cold)
Feed / expansion
tank 450 mm
minimum
1000 mm
minimum
15 mm
cold
feed 150 mm
max.
System
return
System
flow to
pump
Inverted cold
feed entry
Connection
to boilers

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 7
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
Schematic pipework
The boiler does not normally need a bypass but is
required when using 2 port zone valves. Lock shield
valves are required on the radiators in the area where
the thermostat is situated.
Thermostatic radiator valves
An automatic bypass is always required.
To comply with the building regulations that heating
systems utilising the thermostatic radiator valve control
of temperature in individual rooms shall also be fitted
with a room thermostat, controlling the temperature in a
space served by radiators not fitted with such a valve.
Such an arrangement will provide for potentially more
efficient control of the environment and will also avoid
the continuous running of the circulation pump during
programmed heating ON periods - thus saving electrical
energy.
It is, therefore, strongly recommended that, when ther-
mostatic radiator valves are used, space heating
temperature control over a living/dining area or a
hallway having a heating requirement of at least 10% of
the minimum boiler heat output, is achieved using a
room thermostat whilst other rooms are individually
controlled by thermostatic radiator valves.
System examples
fig. 2 Schematic pipework
BOILER
Return
Flow
22 mm
open vent
Elbow
then
tee
15 mm
cold
feed
Radiators
Cylinder
balancing
valve
3 port
valve
Air vent
Alternative
2x2 port
valves
automatic
bypass
NOTE
System examples are to be regarded as
schematic representations only.

8 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Buderus 600 Regular with external 230V connection (Y-plan)
Key to abbreviations:
AB = Automatic Bypass
AV = Air Vent
CB = Connection Block
CBV= Cylinder Balancing Valve
CHF = Central Heating Flow
CHR = Central Heating Return
CT = Cylinder Thermostat
DV = Diverter Valve
FEC = Feed / Expansion Cistern
JB = Junction Box /
RTH Converter
LSV = Lockshield Valve
PL = Permanent Live
PM = Pump
Prog= Programmer
RT = Room Thermostat
TRV = Thermostatic Radiator
Valve
WC = Wiring Centre
fig. 3
fig. 4 Y-plan 230V
Prog
reference room / main living area other rooms
PL
CT
DVPM
TRV
LSV
LSV
LSV
Cylinder
radiator radiator
AV
WC
RT
CHF CHR
FEC
JB
CBV
CB
AB
perty rights.
1
3
2
RT
4
5
2
1
C
2
CT
8
7
6
White
Blue
Grey
Orange
Gr / Yel
5
2
7
8
3
L
N
E
230 vac
1
2
3
HW OFF
HW ON
CH ON
L
N
E
Programmer
7
6
4
1
2
3
1
2
3
230 vac
8
2
Brown
Blue
Gr / Yel
1
2
3
L
N
E
Pump
8
2
3
JB / RTH converter
UBA
10
10
11
TYPE: UBA40 01
Max Safetytime 10 sec
CE REG nr. 63A 05280
DV
PL
1
2
3
4
5
6
7
8
9
10
WC

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 9
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
Buderus 600 Regular with external 230V connection and two port zone valves (S-plan)
Key to abbreviations:
AB = Automatic Bypass
AV = Air Vent
CB = Connection Block
CBV= Cylinder Balancing Valve
CHF = Central Heating Flow
CHR = Central Heating Return
CT = Cylinder thermostat
FEC = Feed / Expansion Cistern
JB = Junction Box /
RTH Converter
LSV = Lockshield Valve
PL = Permanent Live
PM = Pump
Prog= Programmer
RT = Room thermostat
TRV = Thermostatic Radiator
Valve
WC = Wiring Centre
ZV = Two port Zone Valve
fig. 5
fig. 6 S-plan 230V
Prog
reference room / main living area other rooms
PL
CT
PM
TRV
LSV
LSV
LSV
Cylinder
radiator radiator
AV
WC
RT
CHF CHR
FEC
JB
CBV
CB
ZV
ZV
AB
1
3
2
RT
4
5
2
1
C
2
CT
8
Not used
6
White
Blue
Grey
Orange
Gr / Yel
5
2
1
10
3
L
N
E
230 vac
1
2
3
HW OFF
HW ON
CH ON
L
N
E
Programmer
Not used
6
4
1
2
3
1
2
3
230 vac
10
2
Brown
Blue
Gr / Yel
1
2
3
L
N
E
Pump
10
2
3
JB / RTH converter
1
2
3
4
5
6
7
8
9
10
WC
UBA
10
10
11
TYPE: UBA 4001
Max Safety time 10 sec
CE REG nr. 63A 05280
ZV
CH
White
Blue
Grey
Orange
Gr / Yel
8
2
1
10
3
ZV
DHW
PL

10 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Sealed system requirements
1. General
The installation must comply with the requirements of
BS. 6798 and BS. 5449.
All components of the system, including the heat
exchanger of the indirect cylinder, must be suitable for a
working pressure of 3 bar and temperature of 110 °C.
Care should be taken in making all connections so that
the risk of leakage is minimised.\
2. Safety valve
A spring loaded safety valve complying with the relevant
requirements of BS. 6759 must be fitted in the flow pipe
as close to the boiler as possible and with no intervening
valve or restriction. The valve should have the following
features:
– A non-adjustable preset lift pressure not exceeding
3 bar;
– A manual testing device;
– Provision for connection of a discharge pipe. The
valve or discharge pipe should be positioned so that
the discharge of water or steam cannot create a
hazard to the occupants of the premises or cause
damage to electrical components and wiring.
3. Pressure gauge
A pressure gauge covering at least the range of 0-4 bar
must be fitted to the system. The gauge should be easily
seen from the filling point and should preferably be
connected at the same point as the expansion vessel.
4. Expansion vessel
A diaphragm type expansion vessel must be connected
to a point close to the inlet side of the pump, the
connecting pipe being not less than 15 mm size and not
incorporating valves of any sort.
The vessel capacity must be adequate to accept the
expansion of the system water when heated to 110 °C.
The charge pressure must not be less than the static
water head above the vessel. The pressure attained in
the system when heated to 110 °C should be at least
0.35 bar less than the lift pressure of the safety valve.
For guidance on vessel sizing refer to table 1.
For further details refer to BS. 5449 and BS. 7074:1 and
the British Gas Corporation publication: "Material and
Installation Specifications for Domestic Central Heating
and Hot Water".
5. Cylinder
The cylinder must be either of the indirect coil type or a
direct cylinder fitted with an immersion calorifier which is
suitable for operating on a gauge of 0.35 bar in excess
of the safety valve setting. Primatic cylinders are not
suitable for sealed systems.
6. Make-up water
provision must be made for replacing water loss from the
system, either:
– from a manually filled make-up vessel with a readily
visible water level. The vessel should be mounted at
least 150 mm above the highest point of the system,
and be connected through a non-return valve to the
system, filled at least 300 mm below the make-up
vessel on the return side of the domestic hot water
cylinder or radiators.
or
– where access to a make-up vessel would be difficult
by pre-pressurisation of the system. Refer to "Filling",
below.
7. Mains Connection
There must be no direct connection to the mains water
supply or to the water storage tank supplying domestic
water, even through a non-return valve, without the
approval of the local water authority.
fig. 7 System fill and make up
Heating return
Hose
return
Non return
valve Non return valve
Test cock
Stop cock
Mains
supply
Stop
cock
Temporary hose
SYSTEM FILL
Fill point
Heating return Auto
air vent Non
return valve
Stop
valve
Make up
vessel
1000 mm
above the
highest point of
the system
SYSTEM MAKE UP

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 11
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
8. Filling
The system may be filled through a temporary hose
connection from a draw-off tap supplied from a servicing
pipe under mains pressure. Where the mains pressure
is excessive a pressure reducing valve shall be used to
facilitate filling.
The following fittings shall form a permanent part of the
system and shall be fitted in the order stated:
– A stop valve complying with the requirements of
BS. 1010, Part 2 (the hose from the draw-off tap
shall be connected to this fitting);
– A test cock;
– A double check valve of an approved type.
Sizing procedure for expansion vessel
The volume of the expansion vessel (litres) fitted to a
sealed system shall not be less than that given by
table 1, multiplied by a factor of 0.8 (for flow tempera-
tures of less than 80 °C).
Safety valve setting 3.0 bar
Vessel charge and
initial system pressure
0.5 1.0 1.5
bar bar bar
Total water content of
system (litres)
Expansion vessel
volume litres
25 2.1 2.7 3.9
50 4.2 5.4 7.8
75 6.3 8.2 11.7
100 8.3 10.9 15.6
125 10.4 13.6 19.5
150 12.5 16.3 23.4
175 14.6 19.1 27.3
200 16.7 21.8 31.2
225 18.7 24.5 35.1
250 20.8 27.2 39.0
275 22.9 30.0 42.9
300 25.0 32.7 46.8
Multiplying factors for
other system volumes 0.0833 0.109 0.156
Table 1 Expansion vessel volumes

12 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Hazard definitions and abbreviations
Hazard definitions
Abbreviations
AB = Automatic Bypass
AV = Air Vent
CB = Connection Block
CBV = Cylinder Balancing Valve
CH = Central Heating
CHF = Central Heating Flow
CHR = Central Heating Return
CT = Cylinder Thermostat
CWDO= Condensate water drainage outlet
DV = Diverter Valve
E=Earth
FEC = Feed / Expansion Cistern
L=Live
LSV = Lock Shield Valve
MCW = Mains Cold Water
N = Neutal
JB = Junction Box / RTH Converter
PL = Permanent Live
PM = Pump
Prog = Programmer
PRV = Pressure relief valve (safety valve)
RT = Room Thermostat
T=Timer
TRV = Thermostatic Radiator Valve
WC = Wiring Centre
ZV = Two Port Zone Valve
WARNING!
DANGER:
Indicates the presence of hazards that will
cause severe personal injury, death or
substantial property damage.
WARNING!
WARNING:
Indicates the presence of hazards that can
cause severe personal injury, death or
substantial property damage.
CAUTION!
CAUTION:
Indicates presence of hazards that will or
cause minor personal injury or property
damage.
NOTICE:
Indicates special instructions on installation,
operation or maintenance that are important
but not related to personal injury or property
damage.

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 13
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
Installation 1
1 Installation
1.1 Technical specifications
Dimensions Unit
600 Series Buderus wall-mounted condensing gas boiler
11R 19R 24R
Type of gas supply as established in
EN 437 (GB)
GB II2H3P 20 mbar, 37 mbar
(natural gas H, propane P)
Rated heating capacity for system
temperature (modulating from 30° to 100°)
Heating curve 75/60 °C
Heating curve 40/30 °C
kW
kW
4.3 - 10.0
4.9 - 11.0
8.6 - 17.4
9.7 - 19.0
8.6 - 22.0
9.7 - 24.0
Seasonal efficiency (SEDBUK) % 90.3 90.3 90.2
Central heating installation
Heating water temperature °C 40 - 80
ΔT at residual head of 200 mbar °C <20
Max. operating overpressure of boiler bar 3.0
Volume heat exchanger heating circuit l 1.0
Pipe connections
Gas (compression fitting) mm Ø 22
CH flow/return mm Ø 22
Condensate water outlet inch G1"
Flue gas values
Condensate water quantity, natural gas,
40/30 °Cl/h 0.7 1.3 1.6
pH value of condensate water approx. 4.1
Flue gas mass-flow rate
Full load
Part-load
g/s
g/s
4.9
2.2
8.4
4.3
10.6
4.3
Flue gas temperature, full load
Heating curve 75/60 °C
Heating curve 40/30 °C
°C
°C
75
50
85
55
95
55
Flue gas temperature, part-load
Heating curve 75/60 °C
Heating curve 40/30 °C
°C
°C
65
40
70
45
70
45
CO2full load, natural gas
standard test gas G20 % 9.2
CO2full load, natural gas
standard test gas LPG % 10.3
Standard emission factor CO mg/kWh <22
Standard emission factor NOxmg/kWh <30
Max. pressure drop permitted Pa 35 60 100

14 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Installation1
Flue-gas system
Type of flue gas connection C13, C33, C53
Standard diameter of flue gas system mm 60/100
Electrical data
Mains connection voltage V 230
Electrical power consumption
Full/Part load W 40/25 40/25 40/25
Electrical protection rating IPX4D
Boiler dimensions and weight
Height x Width x Depth mm 700 x 460 x 290
Weight (without casing) kg 23.5 23.5 23.5
Casing kg 5.5 5.5 5.5
Dimensions Unit
600 Series Buderus wall-mounted condensing gas boiler
11R 19R 24R

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 15
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
Installation 1
1.2 Dimensions and connections
460 mm
230 mm 50 mm
Ø100 mm
Ø60 mm
290 mm
105 mm
700 mm
604 mm
20 mm
70 mm
82 mm
328 mm
376 mm
25 mm
145 mm
130 mm
CH RETURN
CH FLOW
695 mm
GAS
CWDO
119 mm
8 mm
8 mm
200 mm
21 mm
8 mm
CH Flow = Ø22 mm copper
CH return = Ø22 mm copper
GAS = Ø22 mm compression fitting
CWDO = Condensate water drainage outlet G1" OUTSIDE

16 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Installation1
1.3 Boiler assembly - exploded view
Regular unit (11R / 19R / 24R)
Legend
1. Casing
2. Door complete
3. Ventilation cover
4. Bracket
5. Concentric adaptor
6. Clip adaptor
7. 100 mm Lipring
8. Fan
9. Seal Fan / Venturi
10. 60 mm Lipring
11. Flue gas pipe
12. Condensate collector
13. Seal flue gas pipe
14. Flue gas thermostat (STL)
15. Condensate trap
16. Air silencer tube
17. 50 mm Lipring
18. Gas valve
19. Rectifier
20. Venturi
21. Gas pipe
22. Gas service valve
23. Pipe return/flow top
24. Pipe connection
25. Clip
26. Return pipe
27. Drain cock
28. Connection return
29. Sensor
30. Flow pipe
31. Connection supply
32. Spring heat exchanger
33. Automatic air vent
34. O-ring heat exchanger
35. Seal heat exchanger
36. Safety sensor
37. O-ring
38. Rearpart heat exchanger
39. Gasket heat exchanger
40. Insulation rearpart heat
exchanger
41. Burner 11 kW
Burner 19-24kW
42. Burner seal
43. Heat exchanger
44. Restrictor baffle
45. Front heat exchanger insulation
46. Frontpart heat exchanger
47. Sight glass
48. Securing latch
49. UBA
50. Power switch
51. Glow ignitor
52. Ionisation electrode
53. Cable fan
54. Cable harness
55. Frame
56. RTH converter 230V
57. Seal ventilation cover
58. Assembly casing block
59. Seal
60. Air seal bush
61. Bracket ionisation electrode &
glow ignitor
62. Syphon seal condensate trap
63. Seal syphon
64. Insulation divider
65. Clip & screw insulation divider
66. Cap
67. Seal ionisation electrode
68. Clip air silencer
69. Gas air supply
70. Valve fan / gas air supply
71. Seal glow ignitor
72. Shield glow ignitor
73. Seal venturi / gasket
74. Seal fan / gas air supply
75. Gas air supply valve
76. Plate screw
77. Casing clip
78. Clip
79. Screw M5
80. Gasket
81. Clip
82. Seal flue gas thermostat
83. Seal condensate pipe
84. Swivel dreg with pinchring
85. Screw
86. Syphon
87. Drain pipe condensate trap / syphon
88. 60 mm Lipring
1
44
42
30
24
38
25 9
31
20
23
23
78
24
37
3
15
16
17 54
10
7
6
21
13
48
45
25
33
32
34
28
35
51
52
18
53
11
43
41
46
22
78
50 49
4
29
26
27
36
19
40
39
2
47
12
8
14
5
55
56
86
59
63
62
76
72
71
67
79 73
80
68
64
48
7073 74
69
78
81 81
29
25
32
3534
65
82
85
66
83
88
60
84
84
60
77
58
57
87

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 17
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
Installation 1
1.4 Items supplied with unit
zCheck the contents against the packing list to ensure
that no parts are missing.
Key to fig. 1:
item 1: Wall-mounted condensing gas boiler
item 2: Wall bracket
item 3: Technical documents
item 4: CH Flow connection pipe
item 5: CH Return connection pipe
item 6: Gas service valve
item 7: Plastic bag containing the following accessories:
2 x wall fixing-screws
2 x wall plugs
2 x washers
Seals (2 x ¾“)
Square wrench
Initial start-up sticker
Second identification plate
1.5 Hanging the boiler
The boiler is transported in a horizontal position.
zOpen the box and remove the four foam supports
(fig. 2, item 1). The casing is not attached to the
boiler.
zTake out the casing (fig. 2, item 2) and put aside
during installation.
zHang the wall mounting template.
zDrill the necessary holes.
zTake out the wall bracket (fig. 1, item 2) and attach to
the wall using the wall mounting template.
zTake out the condensing gas boiler (fig. 2, item 3)
and hang onto the wall bracket (fig. 3).
zDispose of packaging.
Fig. 1 Items supplied with unit
1
2
3
7
4
6
5
Fig. 2 Unpacking the box
1
2
3
CAUTION!
CAUTION!
Do not carry the boiler by the casing at
any time.
Fig. 3 Installation

18 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Installation1
1.6 Pipe connections
Buderus advises to use copper piping for the first
600 mm, then it is allowed to switch to another approved
pipe material.
zTake the CH flow connection pipe and the CH return
connection pipe out of the box and connect to the
condensing gas boiler (fig. 4, item 1 and 2).
zConnect the central heating system to these pipe
connections according to the relevant standards.
1.6.1 Gas Supply
The gas installation must be installed in accordance with
BS.6891.
The complete installation MUST be tested for gas
tightness and purged as described in IGE/UP/1b.
1.6.2 Gas connection
zA gas service valve is supplied with the unit. Take it
out of the box and connect it to the boiler see fig. 4,
item 3 with approved P.T.F.E.-tape. Connect to gas
supply according to the relevant standards.
1.6.3 Water circulation system
The central heating system should be installed in
accordance with BS.6798 and, in addition, for smallbore
and microbore systems, BS.5449 or EN 12823.
1.6.4 Condensate removal
Positioning and termination of the condensate drain
pipe
The condensate pipe should be run and terminate
internally to the house soil and vent stack or waste pipe.
Alternatively, the condensate can be discharged into the
rainwater system if connected to a foul water draining
system, or into a purpose-made soak away (condensate
absorption point).
All connecting drainage pipework should generally have
a fall of at least 2.5° to the horizontal, or approximately
50 mm per metre of pipe run. If this is can not be
achieved, consider the use of a condens pump.
Fig. 4 Pipe connections
Key to fig. 4:
item 1: CH flow
item 2: CH return
item 3: Gas
item 4: Condensate water drainage outlet (CWDO)
12
43
CAUTION!
CAUTION!
Ensure that all pipework is routed so as to
minimise any strain on the boiler fittings.
CAUTION!
CAUTION!
Pipework from the meter to the boiler
MUST be of adequate size.

Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006 19
Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.uk
Installation 1
If an external pipe run is unavoidable then the run should
be insulated with water proof insulation limited to 3 m in
length. Should this be exceeded then the pipework
diameter should be increased to 32mm and the
pipework insulated using weather proof materials.
It should be noted that the connection of a condensate
pipe to a drain may be subject to local building controls.
Material for condensate
The condensate drainage pipe should be run in a
standard drain pipe material, e.g. PVC (polyvinyl
chloride), PVC-U (unplasticized polyvinyl chloride),
BS (acrylonitrile-butadienestyrene), PP (polypropylene
polyprolene) or PVC-C (cross-linked polyvinyl chloride).
The condensate drain can be attached to the syphon
(fig. 5).
Any internal pipework should be of a diameter to match
the requirements of the condensate exit pipe on the
appliance.
Internal termination to internal stack
The condensate drainage pipe should have a minimum
outside diameter of 1" with no length restriction. It should
incorporate a trap with a 75 mm condensate seal and be
connected to the stack at a point at least 450 mm above
the invert of the stack. The trap built into the boiler will
provide this 75 mm (fig. 6) condensate seal.
WARNING!
WARNING!
Any external run must be insulated with
water proof insulation.
Fig. 5 Condensate outlet
NOTE
Ensure that the condensate trap is filled
with water.
Fig. 6 Internal termination of condensate drainage pipe to
internal stack
No length restriction
Ø22 mm min.
75 mm min. trap
internal soil
and vent stack
invert
Boiler
450 mm min.

20 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Buderus • http://www.buderus-domestic.co.uk Subject to modifications resulting from technical improvements!
Installation1
External termination via internal branch (e.g. sink
waste)
The condensate drainage pipe should have a minimum
outside diameter of 1" with no length restriction. The
connection should preferably be made downstream of
the sink waste trap. If the connection is only possible
upstream, then the air break is needed between the two
traps. This is normally provided by the sink waste pipe
(see fig. 7 and 8).
Condensate absorption point
The condensate drainage pipe should have a minimum
outside diameter of 1" and the external pipe length
should not be more than 3 m. The condensate
absorption point should be sited in a convenient position
as close as possible to the boiler but not in the vicinity of
other services. See fig. 9 for information.
Fig. 7 External termination of condensate drainage pipe
via internal discharge branch (e.g. sink waste) and
condensate syphon
75 mm min. trap
No length restriction
Ø22 mm min.
Open end of pipe
direct into gully,
below ground but
above water level
Boiler
Sink
Fig. 8 External termination of condensate drainage pipe
via internal discharge branch (e.g. sink waste –
proprietary fitting) and condensate syphon
No length
restriction
Boiler
Open end of pipe
direct into gully,
below ground but
above water level
75 mm min. trap
Ø22 mm min.
Sink
Fig. 9 External termination of condensate drainage pipe to
absorption point
Ø100 mm min.
plastic tube
bottom of
tube sealed
limestone
cladding hole depth
400 mm min.
300 mm min.
25 mm min.
Ground
(either/or)
Two rows of three
12 mm holes at 25 mm centres
50 mm from bottom of tube and
facing away from house
1000 mm min.
Ø22 mm min.
External length of
pipe 3m max.
NOTE
When discharging condensate to an
outside drain caution must be taken to
ensure blockage cannot occur during
freezing conditions. If this is likely to
occur, the use of a syphon trap is
recommended.