Related Manuals for Saunier Duval THEMA C 23
Summary of Contents for Saunier Duval THEMA C 23
- Page 1 Heating and hot water for the professionals Installation and Servicing Instructions THEMA C 23 I N W A R R A N T Y T E C H N I C A L H E L P L I N E...
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Page 2: Table Of Contents
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 your assistance. -
Page 3: Introduction
INTRODUCTION The THEMA C 23 boiler is a wall mounted combina- tion boiler providing central heating and instanta- The boiler is an atmospheric type boiler. This means neous domestic hot water. that the air contained in the room where the boiler is installed, is used for burner combustion. -
Page 4: Technical Data
TECHNICAL DATA Heating output adjustable from 8,7 kW to 23 kW (30,000 Btu/H to 80,000 Btu/H) Efficiency 81 % Maximum heating temperature 90°C 30 °C to 87 °C Heating adjustment Expansion vessel effective capacity 6,5 l Expansion vessel charge pressure 0,5 bar Maximum system capacity at 75°C 140 l... -
Page 5: Boiler Schematic
BOILER SCHEMATIC - On button - Overheat thermostat - Off button - Ignition electrode - Piezo igniter - Pilot - Central heating thermostat - High limit thermostat - Domestic hot water temperature adjuster - Loss of water switch - Temperature/pressure gauge - Flue safety device - Non-return valve - Expansion vessel... -
Page 6: Fixing Jig
FIXING JIG From left to right, the fixing jig comprises: - Heating return with isolating valve (m). - Cold water inlet with isolating valve (p). - Heating flow with isolating valve (q), drain screw (r) and safety valve (s). - Domestic hot water out. - Gas service cock. -
Page 7: Heating System Design
HEATING SYSTEM DESIGN • The THEMA C 23 boiler is compatible with any type allows a maximum system volume of 140 litres for an of installation. average temperature of 75°C and a maximum serv- • Heating surfaces may consist of radiators, convec- ice pressure of 3 bar. -
Page 8: Boiler Installation
3 mm on each pole. The fused room thermostat such as Saunier Duval part spur box should be readily accessible and prefer- number 40010. Please contact your supplier. -
Page 9: Electrical Connection
ELECTRICAL CONNECTION When fitting room thermostat, remove wire link (E) and connect THEMA C 23 voltage free thermostat as shown °C For no external controls leave wire link (E) in place The mains electrical cable is supplied with the boiler. It is coiled and tucked inside the boiler... - Page 10 COMMISSIONING Starting 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. First starting up • Following the instructions given in the 'Controls and Lighting' section, set boiler to run in central heating mode.
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Page 11: Safety Devices
Persistent air in the heating system may indicate leaks in the system or corrosion taking place. Call Frost protection your Installer/Service Provider. The THEMA C 23 boiler has a built in frost pro- Gas leak or fault tection device that pro-... -
Page 12: Changing Gas Type
CHANGING GAS TYPE Should it become necessary to change the gas type, a modification kit will be required. This modification must only be carried out by a suitably qualified engineer. Conversion: Natural Gas (G20) to G30/G31 Part No. XXXXX Conversion: Natural Gas (G20) to G130 Part No. -
Page 13: Routine Cleaning And Inspection
ROUTINE CLEANING AND INSPECTION • With both flow restrictor and filter in place, re- Operation of water valve connect pipe to inlet connection and tighten. • With the Summer/Winter control in the 'Summer' • Fully open isolating cock on cold water inlet con- position, slowly open a convenient tap until boiler nection and check for leaks. - Page 14 REPLACEMENT OF PARTS To replace reversing valve assembly • Remove pressure gauge capillary as described previously. • Remove pump as described previously. • Remove microswitch assembly as described pre- viously. • Remove retaining clip from LHS pipe connection on front section of valve and disengage pipe. •...
- Page 15 REPLACEMENT OF PARTS To replace loss of water switch • Drain down heating circuit of boiler only as de- scribed in 'To replace pump'. Note: It is not necessary to drain entire heating cir- cuit to carry out this work. •...
- Page 16 REPLACEMENT OF PARTS To replace push-button box Note: Use new 'O' ring provided between gas valve • Disconnect electrical connections from right and burner supply pipe. hand side of push-button box. • Refit push-button box and thermocouple. • Undo and remove screw securing push-button •...
- Page 17 REPLACEMENT OF PARTS To replace expansion vessel • Pull off electrical connections from thermostat. 1 Boiler in place • Unscrew and remove two screws holding thermo- Note: The expansion vessel can be replaced with stat to heat exchanger. the boiler in place provided that there is a mini- •...
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Page 18: Schematic Wiring Diagram
SCHEMATIC WIRING DIAGRAM Bdis. 1.11 2.01 2.02 1.12 2.03 1.07 T° 2.04 2.05 3.05 3.09 2.10 2.11 T° K16 1.09 2.12 1.10 3.01 3.02 3.06 1.04 3.03 3.08 Bdis = Push-button box P = Pump 5.12 5.01 P2 = Domestic temperature adjuster K11 = Flue safety device SW3 = Microswitch K4 = Overheat thermostat... -
Page 19: Fault Finding
FAULT FINDING Thermistor values Temperature ( Ω Nominal resistance for NTC 32565 25345 19875 15700 12500 10000 8060 6535 5330 4370 3605 Temperature ( Ω Nominal resistance for NTC 2989 2490 2085 1755 1480 1260 1070 NO CENTRAL HEATING Turn boiler thermostat to max. Does burner fire? Does pump run? Refer to chart no. -
Page 20: Spare Parts
FAULT FINDING NO HOT WATER Open hot tap fully. Does burner fire With selector switch in position and central heating temperature Refer to chart no. 1 adjuster turned to maximum, does burner fire for CH? Is there at least 3 litres/min Check mains water water flow at tap? supply/water filter...
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