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User Instructions
THEMA C
THIS IS A CAT II2H3+ APPLIANCE
Heating and hot water for the professionals
IN WARRANTY
TECHNICAL HELPLINE
01773 828400
01773 828100
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USER INSTRUCTIONS
THEMA C 23
Note!
The boiler serial number is marked on the label attached to the front of these instructions. Refer to
the 'Introduction' section for a description of the basic functions of the boiler.
Mandatory warning notice for CEE countries
UK
WARNING, this appliance is designed,
approved and inspected to meet the requirements
of the English market. The identification plate
located on the inside of the appliance certifies the
origin where the product was manufactured and
the country for which it is intended.
If you see any exception to this rule, please contact
your nearest Saunier Duval dealer.
Thank you in advance for you assistance.
INTRODUCTION
The
THEMA C 23
ing combination boiler providing central heating
and instantaneous hot water.
Both the central heating and domestic hot water
temperature are user adjustable from the boiler
control panel.
Domestic hot water demand always has priority
over heating demand.
These instructions should be carefully followed for
the safe and economical use of your boiler.
Gas safety (Installation and use) Regulations
In your interests and that of gas safety, it is the law
that ALL gas appliances are installed and serviced
by a competent person in accordance with the
above regulations.
Bathroom fittings
Any ancillary equipment such as mixing valves,
showers etc. must be designed to operate at mains
water pressure. Contact your local Water Authority for advice.
Electrical supply
WARNING: This boiler must be earthed.
The boiler must be connected to a 230V
permanant supply.
boiler is a wall mounted modulat-
∼ 50Hz
Introduction.............................................Page 2 - 3
Controls & lighting ................................................. 3
Draining .................................................................. 4
Servicing/maintenance ....................................... 4
To connect a plug:
The colours of three core flexible cable are:
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 .
Boiler location
The boiler should have the following minimum clearances for maintenance purposes:
5mm on each side of boiler
300mm above boiler
250mm below boiler
450mm in front of boiler
Mains failure
In the event of failure of the electrical supply, the
boiler will not operate. When the supply is restored,
the boiler will return to normal operation.
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INTRODUCTION
Gas leak or fault
If a gas leak or fault exists or is suspected, turn off
the gas supply. Do not touch any electrical
switches. Do not smoke. Consult the local gas supply company or your Installer/Service Provider.
Air in the heating system
Persistent air in the heating system may indicate
leaks in the system or corrosion taking place. Call
your Installer/Service Provider.
1-On/Off switch
2-Piezo ignition button
3-Summer/Winter mode selector
4
Overheat safety
In the event of a problem, the overheat safety
devices cause safety shutdown of the boiler. If this
happens, call your Installer/Service Provider.
Boiler controls
The control panel, located behind the pull down
door at the lower front of the boiler casing, see dia-
gram 1, allows the boiler to be started, shut down,
controlled and monitored during use.
4-Hot water temperature adjuster
5-Heating temperature adjuster
5
213
Diagram 1
CONTROLS AND LIGHTING
To light the boiler
Before starting the boiler check that:
• The gas meter tap is open.
• The boiler gas service cock is open.
• The boiler is connected to the electrical supply and
turned on.
1 - Push in and
keep depressed
+
2 - Push in several
times until the pilot
has lit
Hab 257
Hab 269
Setting to summer/Winter mode
Summer
Domestic hot water
only
Winter
Heating and hot
water
Adjustment of
domestic hot water temperature
Open a hot water tap. Turn the
temperature adjuster until the
desired hot water temperature
is obtained.
Hot water always has priority
over central heating.
3 - Wait for 20 seconds after the pilot
has lit
4 - Release button.
The pilot should remain lit, if it doesn't,
repeat operations
1 to 3
To stop the boiler ➜ Push OFF switch (0)
Adjustment of
central heating temperature
Turn the temperature adjuster
until the desired central heating
temperature is obtained.
Make sure that any external controls are calling for heat.
The heating system will begin to
heat up.
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DRAINING
Protection against freezing
The boiler has a built in
frost protection device
that protects the boiler
from freezing. If the boiler
is to be left for a short period and there is a risk of
frost, ensure that the gas
and electrical
supplies are left connected and that the Summer/
Winter switch is left in the position, see diag. 2.
Note: This device works irrespective of any room
thermostat setting and only protects the boiler. Always ensure that adequate frost protection is given
to the entire system where necessary.
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 to avoid the risk of freezing.
If in doubt, consult your Installer/Service Provider.
Diagram 2
Draining and filling
Caution: The boiler is installed as part of a sealed
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 consult
your Installer/Service Provider.
Heating 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 Installer/Service Provider.
SERVICING/MAINTENANCE
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 should be enough.
Cleaning
The boiler casing can be cleaned with a damp
cloth followed by 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 Installer/Service
Provider.
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109452 B 07/98
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