3
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 65
0
C 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.
C
HECK
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
