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Saunier Duval
INSTRUCTIONS FOR USE
THELIA 623 (WITH TIMECLOCK)
AND THELIA 623NC (WITHOUT TIMECLOCK)
The instructions consist of two parts, Installation and
Servicing Instructions and Instructions for Use, they
should be handed to you by your installer on completion
of the installation.
This boiler is for use with Natural Gas as distributed in
the United Kingdom (G20) and cannot be used on any
other gas.
Note. If the boiler has been set to bum any other type of
gas your installer will tell you.
These instructions should be carefully followed for the
safe and economical use of your boiler.
Once the pilot has been lit and the controls set, the boiler
is automatic in operation.
The boiler is able to provide room heating as part of a
central heating system and domestic hot water direct
from a cold water supply, without the need for secondary
storage.
Gas Safety (Installation and Use)
Regulations.
In your interests and that of gas safety it is the law that
ALL gas appliances are installed by a competent person
in accordance with the above regulations.
If a gas leak or fault exists or is suspected, turn the boiler
off and consult the local gas undertaking or your
installation/servicing company.
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Hepworth Heating Ltd., Nottingham Road, Belper, Derbyshire. DE56 1JT
Technical Services Department: Telephone: Belper (0773) 828100
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WARNING. This boiler must be earthed.
The boiler must be connected to a 240V-50Hz
permanent supply.
Connection of the whole electrical system of the boiler
and heating system controls to the electrical supply, must
be through one common isolator.
Isolation should preferably be by a double pole switched
fused spur box. The fused spur box should be readily
accessible and preferably near to the boiler. It should be
identified as to its use.
A fused three pin plug and shuttered socket outlet may
be used instead of the fused spur box, provided that,
Ca)they are not used in a room containing a bath or
shower.
Cb)both the plug and socket outlet comply with the
current issue of BS 1363.
PVC flexible cable having a conductor size of O.75mm
2
C24/0.20mm), to the current issue of BS6500 Table 9
must be used within the boiler casing to connect to the
boiler.
Brown -live
Blue - neutral
Green/yellow - earth
As the marking on your plug may not correspond with
these colours proceed as follows:
The cable coloured blue must be connected to the
terminal marked "N" or black.
The cable coloured brown must be connected to the
terminal marked "L" or red.
The cable coloured green/yellow must be connected to
the terminal marked "E" "Green" or the earth symbol ~,
see diagram 1.
The boiler should have the following minimum
clearances for safety and maintenance.
50mm on each side of boiler
600mm in front of boiler
300mm below boiler
150mm above - back outlet flue
300mm above - top outlet flue
If
the boiler is fitted in a cupboard or compartment do
not obstruct any purpose made ventilation openings or
use the cupboard for storage purposes.
A minimum distance of IOOmm is required between the
front of the boiler and the inside face of the door.
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GREEN AND YELLOW
WIRE (EARTH)
\
BLUE
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WIRE
7-
(NEUTRAL)
CABLE
CLAMP
BROWN
WIRE
(LIVE)
The control panel, located at the lower front of the boiler
casing allows the boiler to be started, shutdown,
controlled and monitored during use, refer to diagram 2.
The panel opens down flat for access to the controls.
Note. At stand-by the fan on the boiler will run at low
speed.
Before starting the boiler check that:
The gas meter tap is open, if using butane or propane
check that valve on gas storage cylinder or tank is open.
The appliance gas service cock is open, see diagram 3.
The boiler is connected to the electrical supply and
switched on.
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KEY:
1 TIMEClOCK
2 SELECTOR lEVER
3 PRESSURE GAUGE
4 TEMPERATURE GAUGE
BOilER THERMOSTAT
(To regulate central heating water temperature)
"OFF" PUSH BUTTON
"ON" PUSH BUTTON
2 Shown
closed
3 Shown
closed
KEY:
1 Isolating valve - C.H. Return
3 Isolating valve - C.H. Flow
2 Isolating valve - D.H. Water
4 Isolating valve - Gas supply
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If fitted, set the built in clock to work, using the
following instructions, see diagram 4.
Place the slide switch to
"C9."
Using the"
'7'''
and "
&"
buttons, set the display to the correct time in twenty four
hour format, that is 1300 for Ipm, see diagram 5.
A~O~
TIMER
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To Set the Programme "ON" and "OFF"
Times
Using the"
'fl"
and"
&"
buttons set the first "ON" time.
Confirm this by pressing the "Enter" button, see
diagram 6.
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ON
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A~O~
TIMER
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Using the
"'fl"
and"
&"
buttons set the first "OFF"
time.
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Confirm this by pressing the "Enter" button.
Repeat this procedure for the remaining five "ON" and
"OFF" times.
Note. The number of "ON" and "OFF" times can be
programmed with a minimum of one and a maximum of
six. When the desired number of "ON" and "OFF"
periods have been set place the slide switch to "AUTO."
The display will show "ON" or "OFF" only, there is no
time display.
The programmed times can be checked at any time by
moving the slide switch from "Auto" to "Cl".
Successive presses of the "Enter" button will then
display the "ON" and "OFF" times. Always return the
slide switch to "Auto" to resume normal operation.
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It is possible to override the automatic operation of the
timeclock - that is, to switch it "On" or "Off' as desired.
To do this first place the slide switch to "Timer".
The letter "h" will appear on the display, see diagram 7.
Press the "On/Off' button to switch the boiler "ON" or
"OFF" as required.
Return the slide switch to the "Auto" position.
Note. The clock features a "Hold" facility which can be
set to keep the boiler, central heating circuit, ON or OFF
for a period of between one hour and twenty seven days.
This can be used to keep the boiler OFF during a
holiday. After the programmed "Hold" time the boiler
reverts to its normal central heating programmes.
I
I
C9
C1
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OFF
AUTO
~ ~TIMER
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Place the slide switch to "Timer".
The letter "h" will appear on the display, see diagram 7.
Using the"
'7"
and"
&"
buttons set the "Hold" time.
Note. After a "Hold" period of twenty three hours has
been exceeded the "h" will change to a "d". It is
possible to set it to "hold" for up to twenty seven days,
see diagram 8.
Using the "On/Off' button set the boiler to the required
operation, that is if the boiler is to stay "Off' for the
"Hold" period set the display to "Off'.
Place the slide switch to "Auto". After the programmed
"Hold" time the boiler will revert to normal timed
operation.
Now continue and check that the central heating system
is full of water, even if you only want the boiler to
provide domestic hot water.
The pressure gauge reads at least 1bar. If not the system
must be pressurised by a competent person.
The central heating flow and return valves are open, see
diagram 3.
The selector lever is in the left hand, domestic hot water
only, position.
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Depress the black "ON", ignition, push button and keep
pushed in.
Note. Air may be present in the gas pipework and the
following operations may need to be repeated.
On pressing the "ON" button, the fan will be heard to
run, for about 10 seconds before ignition, purging the
sealed combustion chamber.
Check that pilot is alight by looking through viewing
window.
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Wait for 10 seconds after the pilot has lit before
releasing black button.
WARNING. Should the pilot fail to remain alight or go
out for any reason, intentionally or unintentionally,
always wait at least 3 minutes before trying to relight the
pilot.
With the selector lever set to the left the boiler will only
supply domestic hot water.
For central heating and domestic hot water the selector
switch should be set to the right.
The control thermostat knob should be turned to between
"MIN" and "MAX", check temperature on temperature
gauge.
Check that the built in clock is "On" and set to the
correct time.
Check that all remote controls are calling for heat.
Note. The pressure gauge will register, when the system
is working, between 1.5 to 2.0bar.
With the selector switch in the central heating/domestic
hot water position domestic hot water will
have PRIORITY.
Adjustment of the control thermostat knob will NOT
have any effect on the temperature of the domestic hot
water.
Temperature control for domestic hot water is done by
the amount of water FLOWING FROM THE TAP, that
is, the greater the flow the lower the temperature.
To Stop the Central Heating and Turn Off
Boiler, Leaving Pilot Alight.
Move the selector switch to the left. The boiler will now
only provide domestic hot water on demand.
The pilot light remains alight.
Complete Boiler Shut Down
Push in the red "OFF" button and the pilot will go out.
Switch off the electrical supply.
To relight, follow the full lighting operation given above,
including, if fitted, resetting the clock.
To ensure the continued efficient and safe operation of
the boiler it is recommended that it is checked and
serviced at regular intervals. The frequency of servicing
will depend upon the installation conditions and usage.
but in general once a year at the end of the heating
season should be enough.
It is the law that servicing is carried out by a competent
person.
Protection Against Freezing
If the boiler is to be out of use for any long periods
during severe weather conditions, it is recommended that
the whole system, including the boiler, be drained off to
avoid the risk of freezing. If in doubt consult your
installation/servicing company.
Draining and Filling
CAUTION. This boiler works in a pressurised system
which must only be drained and filled by a competent
person.
Note. If there is persistent loss of system pressure,
indicated by the pressure gauge YOU MUST
CONTACT YOUR INSTALLER.
Safety Valve
CAUTION. A safety valve with a discharge pipe is
fitted to this boiler.
The valve MUST NOT BE TOUCHED except by a
competent person. If the valve discharges at any time,
switch the boiler off and isolate it from the electrical
supply. Contact your installation/servicing company.
Cleaning
WARNING. The boiler contains metal parts
(components) and care should be taken when handling or
cleaning, with particular regard to edges.
The boiler casing can be cleaned with a damp cloth then
a dry cloth to polish.
Do not use abrasive or solvent cleaners.
Boiler Casing
CAUTION. Do not remove or adjust the casing in any
way, as incorrect fitting may result in faulty operation.
If in doubt contact your installation or servicing
company or the local gas undertaking.
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