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British/Scottish
Gas RD5
the high efficiency boiler
High efficiency, wall hung,
gas fired, fanned flue, combination boiler
RD5
user's guide
Householder's guide to central heating boilers
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British Gas RD5 -
User's
British Gas RD5 (Natural Gas Models Only)
G.C. Appliance No. .........................47 348 17 Destination Country: GB
British Gas:
(Any internal reference to British Gas applies equally to Scottish Gas)
The British Gas RD5 is a cast aluminium wall mounted, full sequence, automatic spark ignition, low water
content, fanned flue, high efficiency combination condensing gas boiler.
The ideal replacement boiler...
Easy to install, easy to operate and easy to service. The British Gas RD5 really is the ultimate replacement
wall mounted combination condensing boiler.
Range suitability...
The RD5 is fully modulating, with a range of 8.8 to 23.4 kW (30,000 to 80,000 Btu) for central heating (CH)
and a maximum of 29.3 kW (100,000 Btu/h) for instantaneous domestic hot water (DHW) output.
System suitability...
The boiler is suitable for connection to fully pumped and sealed water systems.
Free Three Star Service Cover:
In addition to the guarantee we will provide absolutely free a British Gas Services Three Star Service Cover
agreement to cover your complete new system during the first year. The benefits of this cover include priority
attention and a 24 hours a day, 365 day a year helpline. Full details of the terms and conditions for Three Star
Cover schemes are available separately on request.
Introduction
It is essential that the instructions in this booklet are strictly
followed, for safe and economical operation of the boiler.
Due to the very high efficiency, condensate is produced from
the flue gases and this is drained to a suitable disposal point
through the plastic waste pipe at the right lower rear of the
boiler. A condensate 'plume' will also often be visible at the
flue terminal.
The RD5 is a combination boiler providing both central heating
(CH) and instantaneous domestic hot water (DHW).
SAFETY
Current Gas Safety (Installation & Use)
Regulations or rules in force.
In your own interest, and that of safety, it is the law that this
boiler must be installed by a CORGI registered installer, in
accordance with the above regulations.
Electricity Supply
The appliance must be earthed.
Supply 230 V - 50 Hz. The fusing should be 3A.
Connection must be made in a way that allows complete isolation
of the electrical supply - such as a double pole switch, having a
3mm (1/8") contact separation in both poles, or a plug and socket
serving only the boiler and system controls. The means of
isolation must be accessible to the user after installation.
Remote Appliance Diagnostic System
The diagnostic controls within the boiler are capable of communicating
key operational data to a central computer data processing system via
the house ring main and public telephone system known as Remote
Appliance Diagnostic System (RADS).
RADS can identify actual failure or predict imminent failure of
components and specify the corrective procedures to the British Gas
Service Engineer.
To enable the system to operate, a remote mounted interface (Gateway)
is required to receive and transmit data from the boiler.
Without this facility the boiler operates as a standard high efficiency
fanned flue combination condensing gas boiler.
Important Notes
l This appliance must not be operated without
the casing correctly fitted and forming an adequate seal.
l If the boiler is installed in a compartment then the compartment
MUST NOT be used for storage purposes.
l Under NO circumstances should any of the sealed components on
this appliance be used incorrectly or tampered with.
l If it is known or suspected that a fault exists on the boiler then it
MUST NOT BE USED until the fault has been corrected by a CORGI
registered installer.
l Flammable materials must not be placed in close proximity to the
appliance. Materials giving off flammable vapours must not be stored
in the same room as the appliance.
CAUTION:
To avoid the possibility of injury during the installation, servicing or cleaning of
this appliance care should be taken when handling edges of sheet steel components
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British Gas RD5 -
User's
WINTER CONDITIONS - i.e. CH and DHW required
The boiler will fire and supply heat to the radiators but will give
priority to DHW on demand. The DHW preheat will operate as
described under "summer Conditions" during periods when there
is no call for CH.
SUMMER CONDITIONS - i.e. DHW only required
Set the CH external controls to OFF or turn the CH thermostat
knob (B) to minimum. The boiler will fire when required, for a
short period of time, to maintain the DHW calorifier in a
preheated condition and whenever there is a demand for DHW.
Note.
The pump will operate briefly as a self-check once every 24
hours, regardless of system demand.
Control of water temperature
DOMESTIC HOT WATER
The DHW temperature is limited by the boiler controls to 650C maximum
at low draw-of rate, adjustable via the DHW thermostat knob (Y).
Additionally, the temperature can be controlled by the user via the
draw-off tap; the lower the rate the higher the temperature, and
vice versa.
CENTRAL HEATING
The boiler controls the central heating radiator temperature to a
maximum of 82
0
C, adjustable via the CH thermostat knob (B).
Approx. CH flow temperatures for the boiler thermostat settings are:
Knob Setting Flow Temperature
o
C
o
F
Minimum 30 86
Maximum 82 180
To shut down the boiler
1. For short periods. Set the boiler on/off switch (A) to OFF.
2. For longer periods
Set the boiler on/off switch (A) to OFF. Switch the electricity
supply to OFF. For longer periods the entire system should be
drained, including the domestic hot water supply.
To relight the boiler
Repeat the procedure detailed in 'To light the boiler'.
In cases of repeated or continuous shutdown a CORGI registered
installer should be called to investigate and rectify the condition
causing this and carry out an operational test. Only the
manufacturers original parts should be used for replacement.
Minimum Clearances
Clearances of: 165mm (6 1/2") above, 100mm (4") below, 5mm
(1/4") at the sides and 450mm (17 3/4") at the front of the boiler
casing must be allowed for servicing.
The minimum front and bottom clearance allowed when built into
a cupboard is 5mm.
To light the boiler.
(Refer to Frame 1)
If a programmer is fitted refer to the separate instructions for the
programmer before continuing.
1. CHECK THAT THE ELECTRICITY SUPPLY TO THE BOILER IS OFF.
2. Set the boiler on/off switch (A) to off and both the DHW
thermostat knob (Y) and the CH thermostat knob (B) to max.
3. Switch on the electricity supply to the boiler and check that all
external controls, e.g. programmer, room thermostat, etc. are on.
4. Set the boiler on/off switch (A) to ON.
The mains on neon (C) will illuminate and the boiler will commence
the ignition sequence, first supplying heat to preheat the DHW and
then to the CH when required.
Operation
In normal operation the control LED display will show the codes:
(Standby - no demand for heat) (DHW preheat)
(CH being supplied) (DHW being supplied)
During
ignition
the LED will
flash.
During
normal running
the LED will remain illuminated.
Note.
If the boiler fails to light after 3 attempts the fault code
will be displayed.
Press and hold the reset button (E) for 2 seconds then release.
The boiler will repeat the ignition sequence. If the boiler fails to
light consult a CORGI registered installer.
THE LOG BOOK SHOULD BE COMPLETED AFTER
EACH SERVICE AND KEPT WITH THESE
INSTRUCTIONS.
All CORGI Registered Installers carry a CORGI ID card, and have a registration number. Both should be
recorded in your Benchmark Log Book. You can check your installer by calling CORGI direct on 0156 372 300.
Legend
A. Boiler on/off switch.
B. CH thermostat knob.
C. "Mains on" neon.
D. Neon.
E. Reset button.
Y. DHW thermostat knob.
1
BOILER CONTROLS
A
C
Y
B
E
D
LED display
Ecl 6056
Condensate
drain
Pressure
gauge
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Priority Helpline 08459 500 400
If you would like this leaflet in an
alternative format such as large print,
Braille or audio cassette please call
us on 0845 7 754 754
If you have impaired hearing
and use a text phone please
call us on 0845 6 040 345
May 2002 UIN 158233 A01
British Gas pursues a policy of
continuing improvement in the design
and performance of its products. The
right is therefore reserved to vary
specification without notice.
British Gas Services Limited. Registered in England, No. 3141243. Registered Office:
Millstream, Maidenhead Road, Windsor, Berkshire SL4 5GD. British Gas Services Ltd.
has made every effort to ensure that the information contained in this leaflet is accurate.
However, not all the information is within the control of British Gas Services Ltd., and it
may have changed since publication. British Gas Services Ltd. does not accept any
liability for changes which occur after publication. No guarantee takes away any rights
you may have at law. Calls to this number may be monitored to maintain a high level of
service and for training purposes.
CERTIFIED PRODUCT
Manufactured under a BS EN
ISO 9001:1994 Quality
System accepted by BSI
The code of practice for the installation,
commissioning & servicing of central heating systems
British Gas Services Limited is a member of the Benchmark
initiative and fully supports the aims of the programme.
Benchmark has been introduced to improve the standards of
installation and commissioning of central heating systems in
the UK and to encourage the regular servicing of all central
heating systems to ensure safety and efficiency.
This boiler is exclusively manufactured for British Gas by Ideal Boilers
Do not fire the boiler if the pressure has reduced to
zero from the original setting.
Condensate Drain
The condensate drain must not be modified or blocked. Blockage
of the condensate drain, caused by debris or freezing, can cause
automatic shutdown of the boiler.
If freezing is suspected and the pipe run is accessible an attempt
may be made to free the obstruction by pouring hot water over the
exposed pipe and clearing any blockage from the end of the pipe. If
this fails to remedy the problem the assistance of a CORGI registered
installer should be sought.
Escape of gas
Should a gas leak or fault be suspected contact your local gas
supplier without delay.
Do NOT search for gas leaks with a naked flame.
Cleaning
For normal cleaning simply dust with a dry cloth. To remove
stubborn marks and stains use a damp cloth and mild detergent. DO
NOT use abrasive cleaning materials.
Maintenance
The appliance should be serviced at least once a year by a
CORGI registered installer.
Frost Protection
If no frost protection is provided and frost is likely during a short
absence from home leave the heating controls (if fitted) at a reduced
temperature setting. For longer periods the entire system should
be drained.
If the system includes a frost thermostat then, during cold weather,
the boiler should be turned OFF at the time switch (if fitted) ONLY.
The mains supply should be left switched ON, with the boiler
thermostat left in the normal running position.
Boiler Overheat Thermostat
This thermostat will shut down the boiler in the event of overheating.
Should this occur a fault code '
' will be displayed. Press the
reset button (E) and the boiler will relight. If the fault recurs turn off
the boiler and consult a CORGI registered installer.
Flame Failure
Should this occur a fault code will be displayed. Press the reset
button (E) and the boiler will relight. If the fault recurs turn off the
boiler and consult a CORGI registered installer.
Loss of system water pressure
The pressure gauge indicates the central heating system pressure.
If the pressure is seen to fall below the original installation pressure
of 1-2 bar over a period of time then a water leak is indicated. In
this event a CORGI registered installer should be consulted.
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