CONTROLS AND LIGHTING

Lighting the THELIA 23 and THELIA SB 23 boilers
1 - Push in and hold 2 - The pilot lights. Check that pilot is alight by looking through the viewing window. 4 - Release : the pilot must remain ON, if the pilot does not remain lit, repeat the previous steps.

1 / ON

Diagram. 1
OPENING THE CONTROL PANEL COVER

3 - Wait for 20 seconds

Note : On pressing the ON button, the fan will be heard to run at full speed after which the ignition sequence will start and the pilot will light. 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 control panel, located at the lower front of the boiler casing diag. 1 allows the boiler to be started, shut down, controlled and monitored during use. Control panel description (diag. 2 and 3) : 1 - "ON" push - button. 2 - "OFF" push - button. 4 - Boiler thermostat. 5 - Temperature gauge. 6 - Pressure gauge. 7 - Summer - Winter lever (THELIA 23, THELIA 23 E). Summer - Winter switch (THELIA SB 23). 30 - Domestic hot water temperature adjustment.
Lighting the THELIA 23 E boiler

Push in and release

Diagram. 2
BOILER CONTROL PANEL THELIA 23, THELIA 23 E

Hab 130

0 / OFF

90 110

Diagram. 3
BOILER CONTROL PANEL THELIA SB 23

Hab 044a

Hab 043a

Hab 129

OPERATION - CHECKS

THELIA 23, THELIA 23 E

THELIA SB 23
HEATING + HOT WATER q Place the selector lever (diagram. 4) to position (winter). In this position the domestic hot water will have PRIORITY.
HEATING ONLY Turn the selector switch (diagram. 8) to position (winter).

Diagram. 4

Diagram. 8
Hot water : Turn the knob (diagram. 5) in order to obtain a water temperature suited to the demand.

Hab 128

Diag. 5

Reg 012

Heating : turn the knob (diagram. 6) in order to obtain a water temperature suited to the demand, and adjust the room thermostat to the desired temperature.

Diag. 6

Note : If you are out for a few days, set the button (diagram. 9) to the minimum value in order to protect the boiler from frost. In case of prolonged absence, refer to Draining section page 9.
Note : If you are out for a few days, set the button (diagram. 6) to the minimum value in order to protect the boiler from frost. In case of prolonged absence, refer to Draining section page 9. HOT WATER ONLY Place the selector lever (diagram. 4) to position (summer). Heating is switched OFF. The boiler will provide hot water only. Turn the knob (diagram. 5) in order to obtain a water temperature suited to the demand.
ALTERNATIVE OPERATING MODE THELIA SB 23 You may select the operating mode using the switch (diagram. 8) : Winter Summer Heating only Domestic hot water only mode. The boiler will keep the separate storage cylinder, where fitted, at the desired temperature. Heating and domestic hot water mode

Winter

Hab 133
STOPPING THE BOILER Press the (O/OFF) push-button (diagram. 7) : this will close OFF the gas supply valve. Electrical power supply to the boiler will be automatically switched OFF.

Diag. 7

STOPPING THE BOILER q Press the (O/OFF) push-button (diagram. 10) : this will close OFF the gas supply valve. Electrical power supply to the boiler will be automatically switched OFF.

Diag. 10

q Heating : turn the knob (diagram. 9) in order to obtain a water temperature suited to the demand, and adjust the room thermostat to the desired temperature.

Diag. 9

Hab 131
CLOCK - INSTRUCTIONS FOR USE
The boiler is connected to the electrical supply and switched on. IF FITTED, SET THE CLOCK TO WORK, AS THE INSTRUCTIONS BELOW. General Description The timeclock has an internal, factory set programme which switches the boiler "On" and "Off" three times a day as below. 1st ON 06.30 1st OFF 08.30 2nd ON 12.00 2nd OFF 12.00 3rd ON 16.30 3rd OFF 22.30 It also has an advance feature, a hold or holiday feature, details on how to set these are given further on in these instructions.

Saunier Duval

on off

Diagram. 11

C1 AUTO TIMER

res enter

Setting the Time With the electrical supply to the boiler switched on, place the slide switch to " ". Press the "Reset" (res) button for a few seconds, using a pointed object, such as a pencil. When released the display will begin to flash, see diagram 11. " buttons, set the display to Using the " "and " the correct time in twenty four hour format, for example, 1300 for 1pm, see diagram 12. Helpful Hint The " " and " " buttons are used to change times. Press and release for small changes. If you press and hold down the time will "run".

Diagram. 12

To Set the Programme "On" and "Off" Times At this stage, if you want to use the internal, factory set, programmes simply place the slide switch to "Auto". The display will show the current time. The "On" or "Off" symbol will be shown according to the time of day. To Override or Advance the Timeclock To advance the time clock operation, that is, switch the heating "On" when it is "Off" or the other way round, press the "On/Off" button. The timeclock will switch the heating "On" or "Off" as desired and the "On" or "Off" symbol will flash to show that it has been overridden. See diagram 13. Note. The boiler will stay "On" or "Off", as selected, until the timeclock programme reaches its next "On" or "Off" time. From then on, the timeclock will switch the boiler "On" and "Off" according to the internal programme. When the boiler is again controlled by the internal programme the "On" or "Off" symbol will stop flashing. The timeclock operation can be overridden in this way at any time.

Diagram. 13

ON C1 AUTO TIMER
To Set Your Own Programme "On" and "Off" Times Note. The timeclock can be set to give a minimum of one and a maximum of three "On" and "Off" times. Place the slide switch to "C1". Press the "Enter" button. The display will show the first "On" time, see diagram 14. Using the " " and " " buttons, change the first "On" time to the time you require. Press the "Enter" button twice. This stores the new time and shows it to confirm it has been stored in the timeclock memory. Press the "Enter" button again. The display will show the first "Off" time, see diagram 15. Using the " " and " " button, change the first "Off" time to the time you require. Press the "Enter" button twice. The display will show the first "On" time. Press the "Enter" button again. The display will now show the first "Off" time you have just entered. Repeat the above for the remaining "On" and "Off" times. When you have set the "On" and "Off" times you require, place the slide switch to "Auto". Note. If you do not want to set all three "On" and "Off" times, follow the above instructions, but, after you have set the times you require, set the other times to show a series of dashes, using the " " and " button, see diagram 16. " The series of dashes are between times 23.59 and 0.00.

Diagram. 14

Diagram. 15
Helpful Hint. If you get confused and wish to start again, press the "Reset" (res) button and the timeclock will go back to the internal factory set programme. You can now reset the current time and start again.

-.-on off

Diagram. 16
To Check the Programme "On" and "Off" Times The programmed "On" and "Off" times can be checked at any time by moving the slide switch from "Auto" to "C1". Successive presses of the "Enter" button will then show the "On" and "Off" times. Always return the slide switch to "Auto" to return to normal timed working.

Diagram. 17

To Set the "Hold" or "Holiday" Feature The timeclock has a "Hold" or "Holiday" feature which can be set, if required, to keep the central heating "On" or "Off" for a period between one hour and twenty seven days. This can be used, for example to keep the central heating "Off" during a holiday. After the programmed time has gone by, the boiler returns to its normal programmes. To set the "Hold" or "Holiday" feature carry on as follows: Place the slide switch to "Timer", the letter "h" will appear on the display, see diagram 17. " and " Using the " time required. " buttons, set the Hold
After a hold period of twenty three hours has been exceeded, the "h" symbol on the display will change to a "d". The "hold" time will now be in days, instead of hours, see diagram 18. Use the "On/Off" button to set the boiler to the required operation during the "Hold" period. Place the slide switch to "Auto". After the programmed hold time, the boiler will return to normal timed working.

Diagram. 18

DRAINING
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 to avoid the risk of freezing. If in doubt, consult your servicing company. 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 contact the installer or servicing company.
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.

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 installation/ servicing company.

TECHNICAL DATA

A ELI TH

ELI A SB

Heating useful output,

adjustable from.

(kW) (BTU/H) to. (kW) (BTU/H) (%) (C) (l) (l) (bar) () () (kW) (BTU/H) to. (kW) (BTU/H) (C) (l/min.) (l/min.) (bar) (bar) (V) (A) (W)
8,9 8,9 8,9 30,000 30,000 30,000 23,3 23,3 23,3 80,000 80,000 80,000 82,6,82,6,82,6,100 230 0,73 130
Efficiency Heating max. output temperature Heating regulation Heating system expansion vessel, effective capacity System max. capacity at 75C Safety valve, maximum service pressure Products outlet Fresh air inlet Output in hot water mode, automatically variable from.
adjustable by user between 30 and 87C
8,9 8,9 30,000 30,000 23,3 23,3 80,000 80,0,230 0,11 0,230 0,73 130
Max. hot water temperature Operating threshold flow rate in sanitary hot water mode Specific flow rate (for 30C temperature rise) Mini. supply pressure Max. supply pressure Electrical supply Amperage Max. power absorbed

Natural Gas (G20)

Pilot injector Burner injector Inlet pressure Gas rate (maximum) Gas rate (minimum) Pilot injector Burner injector Inlet pressure Gas rate (maximum) Gas rate (minimum) Pilot injector
(mm) (mm) (mbar) (m3/h) (m3/h) (mm) (mm) (mbar) (kg/h) (kg/h) (mm) (mm) (mbar) (kg/h) (kg/h) (mm) (mm) (mbar) (m3/h) (m3/h)
0,28 1,2,70 1,13 0,18 0,2,01 0,84 0,18 0,1,98 0,83
1,2,70 1,13 0,2,01 0,84 0,1,98 0,83 2,3,88 1,63
Propane (G31) Town gas (G130)

Butane (G 30)

Burner injector Inlet pressure Gas rate (maximum) Gas rate (minimum) Pilot injector Burner injector Inlet pressure Gas rate (maximum) Gas rate (minimum)

Burner pressure (mbar)

Heat output (kW) 8,23,3 (Btu/h) 79552 Heat input (kW) 11,9 13,1 14,2 15,3 16,4 17,5 18,7 19,9 21,1 22,2 23,4 24,6 25,6 26,8 28,3 (Btu/h) 96602 GAS
G 20 G 30 G 31 G 130 (mbar) (mbar) (mbar) (mbar) 1,8 4,1 5,3 0,5 2,2 5,0 6,4 0,6 2,6 5,9 7,5 0,7 3,1 6,8 8,7 0,8 3,5 7,8 10,0 0,9 4,0 8,9 11,4 1,0 4,5 10,2 13,0 1,2 5,1 11,5 14,7 1,3 5,8 12,9 16,5 1,5 6,4 14,4 18,4 1,7 7,1 15,9 20,4 1,8 7,8 17,5 22,4 2,0 8,5 19,1 24,5 2,2 9,3 20,9 26,7 2,4 10,4 23,3 29,8 2,7

Pressure loss between flow and return boiler connections (metres head)
Pump The performance of the pump, running at maximum speed, varies according to the pump bypass setting, see diagram 19.

by pass fully closed

500 1000

Water flowrate (l/h)

open 1 tu rn open 2 turn s open 3 turns by pass fully open

Diagram. 19

DIMENSIONS

Diagram. 20

The boiler is delivered in three separate packages : - the boiler itself - its connection plate - the flue system. THELIA 23, THELIA 23 E Net weight : 41 kg Gross weight : 43 kg THELIA SB 23 Net weight : 40 kg Gross weight : 42 kg

Hab 132

Pom 023

BOILER SCHEMATIC

"ON" push - button. "OFF" push - button. Spark generator. Central heating water temperature adjustment. Temperature gauge. Pressure gauge. Summer - Winter lever. Expansion vessel. Pump. Automatic air vent. Burner. Heat exchanger air vent. Heat exchanger. Multi - functional control. A B C D F Safety electrovalve (THELIA 23 E only). Hight limit thermostat. Ignition electrode. Pilot (not THELIA 23 E) Hot water thermistor. Flame sense electrode (THELIA 23 E only). Loss of water switch. Fan. Airflow switch. Domestic hot water temperature adjustment.
- Heating return - Cold water - Heating flow - Domestic hot water out - Gas inlet

Diagram. 21

Shy 067a
"ON" push - button. "OFF" push - button. Spark generator. Central heating water temperature adjustment. Temperature gauge. Pressure gauge. Expansion vessel. Pump. Automatic air vent. Burner. Heat exchanger air vent. Heat exchanger. Multi - functional control. Hight limit thermostat. Ignition electrode. Pilot Hot water thermistor. Loss of water switch. Fan. Airflow switch.
A - Heating return C - Heating flow F - Gas inlet

Diagram. 22

Shy 068a

CONNECTION PLATE

Diagram. 23
From left to right, the connection plate is equipped with : A - Heating return with isolating valve (m). B - Cold water inlet with isolating valve (p). C - Heating flow with isolating valve (q), drain screw (r) and safety valve (s). D - Domestic hot water out. E - Electrical connector. F - Gas service cock.

Filters and washers : 1 - Fibre washer 2 - Metal filter 3 - Flow regulator 4 - Plastic filter 5, 6 & 7 - Black graphite

3 A B C

m D F p

Pla 105a

From left to right, the connection plate is equipped with : A - Heating return with isolating valve (m). C - Heating flow with isolating valve (q), drain screw (r) and safety valve (s). E - Electrical connector. F - Gas service cock.
Filters and washers : 1 - Fibre washer 2 - Metal filter 5 & 7 - Black graphite

m p r 5 q s 7 F

Pla 116a
PIPING SYSTEM INSTALLATION
Water connection Connect the water pipes to the fixing jig connecting plate using the copper tails supplied. Warning : To prevent damage to the isolating cocks, do not solder joints or fittings with the copper tails connected. Safety valve discharge WARNING. It must not discharge above an entrance or window or any type of public access area. Connect the safety valve discharge pipe to the valve, the discharge must be extended, using not less than 15 mm o.d. pipe, to discharge, in a visible position, outside the building, facing downward, preferably over a drain. The pipe must have a continuous fall and be routed to a position so that any discharge of water, possibly boiling or steam cannot create any danger to persons, damage to property or external electrical components and wiring. Tighten all pipe connection joints. Gas connection q The supply from the governed gas meter must be of adequate size to provide a constant inlet working pressure of 20 mbar (8 in wg). To avoid low gas pressure problems, it is

Diagram. 24

recommended that the supply is connected using 22 mm pipe wherever possible. q On completion the gas installation must be tested using the pressure drop method and purged in accordance with the current issue of BS6891 q Connect the gas supply to the gas service cock and then the gas service cock to the union on the gas inlet elbow, see diagram 24. q If it is an existing LPG installation ensure that it is capable of providing sufficient additional quantity of gas. 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.

BOILER LOCATION

Clearances The position of the boiler must be such that there is adequate space for servicing. The recommended clearances are: 50mm either side of the boiler. 600mm at the front of the boiler. 300mm below the boiler. Fixing jig The fixing jig is supplied in three parts : 1) The connecting plate which allows the connection and soundness testing of all the pipework before the boiler is fitted and helps support the weight of the boiler. 2) The hook which supports the weight of the boiler. 3) The template which ensures the hook and the connecting plate are correctly fitted relative to one another. Place template on wall in required position making allowance for the necessary clearances etc. Mark the position of the holes for the hook and the connecting plate. Drill, plug and fix the connecting plate and hook to the wall using suitable screws. Check that both the connecting plate and hook are level. If the boiler is not installed immediately, protect the various couplings to prevent any ingress of foreign materials E.G. plaster, paint, etc. Terminal position The minimum acceptable spacings from the terminal to obstructions and ventilation openings are as shown in diagram 26. The boiler must be installed so that the terminal is exposed to the external air.

Diagram. 25

255 mini

50 mini

Note. Under certain weather conditions the flue may produce a plume of condensation. If the terminal is fitted within 850mm of a plastic or painted gutter or 450 mm of painted eaves, an aluminium shield of a minimum length 750 mm should be fitted to the underside of the gutter or painted surface. Terminal guard If a terminal guard is required, a suitable guard with integral deflector can be obtained from your supplier, Saunier Duval part number 85373. Cupboard or compartment ventilation The boiler can be fitted in a cupboard or compartment as long as adequate permanent high and low level ventilation is provided in accordance with ventilation requirements.

Ins 012a

Diagram. 26
Minimum dimensions (in mm) for the positioning of flue terminals A B C D E F G H I L M N under a window... 600 under an air vent.... 600 under a gutter.... 300 under a balcony... 300 from an adjacent window... 400 from an adjacent air vent.. 600 from vertical or horizontal air pipes... 600 from an external corner of the building.. 300 from an internal corner of the building.. 1000 from the ground or from another floor.. 1800 between two terminals vertically.. 1500 between two terminals horizontally.. 1000
G O C E P A B D I H L F M

Ven 060a

BOILER INSTALLATION
Statutory requirements The installation of this boiler must be carried out by a competent person in accordance with the relevant requirements of the current issue of: The Gas Safety (Installation and Use) Regulations The Building Regulations The local water company Byelaws The Building Standards Regulations (Scotland) The Health and Safety at Work Act Sheet metal parts WARNING. When installing or servicing this boiler, care should be taken when handling the edges of sheet metal parts to avoid the possibility of personal injury. Installing the boiler Prior to starting work, the system must be thoroughly flushed with a suitable cleaning agent so as to eliminate any foreign bodies and contaminants such as filings, weld particles, oil, grease etc. NOTE : solvent products could cause damage to the system.

Calculation of flue cutting lengths Measure the wall thickness e (mm).

Diagram 33

For side flues, measure distance from inside face of the side wall to the centre line of the boiler and subtract 205 mm to get dimension a (mm), see diagram 33 or 34.

Diagram 34

Hab 208

Hab 209

Pho 026

Pho 086

Refer to table 1 for the cutting lengths of both the PVC and the aluminium flue pipes for each of the various flue options available. Important. All cutting lengths must be measured from the locking fitting end of the flue pipes, see diagram 35.

Diagram 35

PVC pipe

Cutting length

Extension kits When the distance X measured on site is greater than given in table 1, a flue extension kit will be required, refer to table 2. Assembly of extended flue The flue extension kit, see diagram 36, comprises: - PVC pipe... A - PVC connector... B - Aluminium pipe with fitted connector. C - Triangular pipe support.. D - Two fixing screws.. (not shown)

Table 1

Flue option Cutting length (mm) PVC outer pipe e + 70 aluminium inner pipe e + 195 Comments

Locking fitting end

Aluminium pipe

Ven 083

Diagram 36

Ven 084 Ven 085

maximum wall thickness "e" without extension 511 mm maximum distance "X" without extension 797 mm maximum distance "X" without extension 739 mm

Back outlet Rear flue

Table 2
Flue option Dimension "X" N of extension kits 1 2
Back outlet Side flue to left (diagram 5)

e + a + 35

e + a + 155
Back outlet e + a + 90 Side flue to right (diagram 6)

e + a + 215

Side flue (left) Side flue (right)
797 to 1527 mm 1527 to 2257 mm 739 to 1469 mm 1469 to 2199 mm
The PVC connector is used to connect the PVC extension pipe to the PVC pipe supplied with the boiler or to another extension pipe, if more than one is used. It is a secure push fit onto the pipe ends, no adhesive is required. The connector fitted to the aluminium extension pipe is fitted to the next extension pipe, if more than one is used. The two screws provided must be used to fasten the two pieces together once assembled, using the pre-drilled holes in both the connector and pipe end, see diagram 37. The triangular pipe support should be slid onto the aluminium pipe before final assembly and positioned near the pipe joint to support and locate the inner pipe correctly within the outer PVC pipe.

Important : all cutting lengths should be measured from the locking fitting end of the pipe. Check before cutting. If the distance between the end of either of the cut pipes or the pipe connector will be 30 mm or less, refer to diagram 39, it will be necessary to reduce the length of both the PVC and aluminium extension pipes, and those supplied with the boiler, to achieve the required overall cutting length for the extended flue pipes. Note : if the length of any aluminium pipes other than the final extension pipes have to be reduced in this way, it will be necessary to drill two fixing holes in these pipes to match the fixing holes in the aluminium connector.

Diagram 37

Cutting lengths for extended flues Using the correct number of the extension kits, as table 2, assemble both the extended PVC and aluminium pipes by adding the extension pieces to the flue pipes supplied with the boiler. Do not fasten the aluminium pipes together at this stage. Mark and cut both extended flue pipes, referring to diagram 38, using the cutting lengths given in table 1.

Aluminium extension pipe

Connector

Fixing screws

Aluminium flue pipe

Diagram 38

Aluminium pipe Extension aluminium pipe

Diagram 39

Extension aluminium pipe

Cutting lenght

PVC pipe Extension PVC pipe
This dimension must be 30 mm or greater
Ven 086 Ven 087 Ven 088a Pla 105a Pho 087

Extension PVC pipe

Installation of flue assembly q Fit the PVC pipe (A) into the wall with locking fitting end to outside. q Fit the rubber sealing collar (C) into the groove at the outer end of the PVC pipe. q Pull the PVC pipe inwards to bring the rubber sealing collar hard against the external wall, see diagram 40. q Spot drill two holes using a 2.5 mm drill through the flange and PVC pipe. q Fasten the flange to the PVC pipe using the two self tapping screws provided. q From inside, fully insert the aluminium pipe (B), locking end first, into the PVC pipe. Turn aluminium pipe anticlockwise, viewed from inside, as far as possible. q Fit the rubber connecting sleeve (D), plain end first, onto the end of the PVC pipe. Push it on as far as possible. q Lift the boiler and engage both fixing jig hooks in the two support brackets on the back of the boiler. q Lower the boiler until it rests on the outward facing lip at the centre of the connecting plate. q Make the connections between the boiler and connecting plate using the sealing washers, flow regulator and filters provided, see diagram 41. Important : the gas connection must be made first as there is no flexibility in this connection. Do not forget the sealing washer. q Connect the aluminium pipe onto the central outlet of either the straight flue connector or the flue elbow. To do this, the aluminium pipe must be held and turned clockwise, as viewed from inside. The aluminium pipe will move out from the PVC pipe and can be twisted onto the centre of the flue connector or elbow. q Make sure that aluminium pipe is firmly fixed either to the flue connector or elbow and is correctly locked into the PVC outer pipe. Note. The aluminium pipe is correctly fitted and locked only when the concentric spacer is FLUSH with the outermost end of the PVC pipe, see diagram 42. q After checking that the aluminium pipe is correctly fitted, pull the rubber sleeve towards the boiler and fit the flanged end fully over the spigot of the boiler flue connector or elbow, to make a seal.

Diagram. 50a

Diagram. 50b
EXTERNAL CONTROLS CONNECTIONS THELIA 23, THELIA 23 E
EXTERNAL CONTROLS CONNECTIONS THELIA SB 23
No external controls Factory fitted link Boiler connector
No external controls Factory fitted link
Room thermostat only Room thermostat only External controls plug Voltage free room thermostat External controls plug
Voltage free room thermostat

Do not connect

Room thermostat and time clock Time clock Voltage free room thermostat
Timeclock, room thermostat and cylinder thermostat

External controls plug

Time clock
Voltage free cylinder thermostat

sch 070 UK

The commissioning and first firing of the boiler must only be done by a competent person. Gas installation q It is recommended that any air is purged from the pilot supply pipe (THELIA 23 and THELIA SB23) and from the inlet test point (THELIA 23E). q Isolate boiler from the electrical supply THELIA 23 and THELIA SB 23 Disconnect the supply pipe from the pilot injector tube by unscrewing nut. q Carefully pull end of supply pipe downwards from the tube. Push in and hold black (ON) button until gas is present at the end of the pipe. q Immediately release black button and reconnect pipe to pilot injector tube. DO NOT OVERTIGHTEN NUT. q Check for gas soundness with black button pushed in.

Diagram. 51

Diagram. 52

Diagram. 53

THELIA 23E q Remove screw from inlet test point at rear of multi-functional control. q Push in and hold black (ON) button until gas is present at the inlet test point. q Immediately release black button and replace screw to inlet test point. q Check for gas soundness with black button pushed in. Filling the system q With the selector (diagram. 51 or 52) in the winter position or , open the shut-off valves (q, m and p diagram. 53) (the slot of the screw corresponds to flow direction), the bleed plug situated on the pump (diagram. 54), and the bleed valves. q Open the heat exchanger bleed valve (diagram. 55) and bleed each radiator until a continuous jet of water is obtained. Screw the cap back tight. q Do not close the pump bleed plug. q Open the various water taps to bleed the system q Make sure that pressure gauge pointer reads between 1 and 2 bar. Important : - When venting air from the boiler, do not touch the Schrader valve on the expansion vessel, it is NOT a vent. - Before starting the boiler, turn the pump impellor to make sure it is free to move. - Unscrew black cap on front of pump. - Using screwdriver, push in pump spindle and turn pump impellor 3 to 4 times. DO NOT HIT SPINDLE. Replace black cap. First starting-up Turn the selector (diagram. 51 or 52) to or position. q Set the room thermostat for the maximum temperature and check that any external controls, if fitted, are calling for heat.

Diagram. 54

Diagram. 55

Reg 008

Reg 007

Ins 017a

q Turn the knob (diaDiagram. 56 gram. 56) to switch the boiler ON and OFF: clockwise to increase the temperature, anti-clockwise to decrease. The burner will automatically turn ON at full rating, at reduced rating, or will turn OFF. q Allow the temperature to rise to the maximum value, with all radiator valves open. The temperature rise will cause release of the gases contained in the water of the central heating system : - Gases driven toward the boiler will be automatically exhausted through the automatic air vent. - The gases trapped at the highest point of the system must be released by bleeding the radiators. On reaching maximum temperature, the boiler should be turned off and the system drained off as rapidly as possible whilst still hot. q Refill the system to a pressure of 1 bar and vent as before. q Restart the boiler and operate until maximum temperature is reached. Shut down the boiler and vent the heating system. If necessary, top up the heating system and make sure that a pressure of 1 bar is indicated on the pressure gauge when the system is COLD. Reg 012
the given figure, check the gas inlet pressure as follows: q Shut down boiler. q Remove screw from inlet test point at rear of multi-functional control. q Connect a suitable pressure gauge. q Start boiler as described in Instructions for Use q Check that the inlet pressure reading on the gauge matches that given in Technical Data for the type of gas being used. q Shut down boiler. q Remove the pressure gauge, replace test point screw and check for gas soundness. q If the gas pressure is incorrect, refer to the Fault Finding section in servicing instructions. q If inlet pressure is below that given, the gas supply pipework/meter must be checked and any fault corrected. q In the case of an LPG installation, check the storage tank or cylinder, regulator and pipework.

Diagram. 57

Starting the boiler Before starting the boiler check that: - The gas meter tap is open. If using butane or propane, check that valve on storage cylinder or tank is open. - The boiler gas service cock is open. - The boiler is connected to the electrical supply and switched on. - The selector lever is in the left hand position. Gas pressures The main burner pressure should be checked during commissioning to make sure the correct input is obtained. Proceed as follows : q Shut down boiler. q Remove screw from test point on main burner, below sealed chamber of boiler (see diag. 57). q Connect a suitable pressure gauge. q Set selector lever to right hand, heating and hot water position. q Start boiler as described in Instructions for Use q Set control thermostat to maximum, fully clockwise, and check that any external controls are calling for heat. q Check that the reading on the gauge matches that given in Technical Data for the type of gas being used. q Move the selector lever to the left hand position, remove the pressure gauge, replace test point screw and check for gas soundness. q If measured burner pressure differs greatly from

q Open a hot water tap to a high flow rate, at least 8 litres/minute. The burner pressure should increase to the maximum values stated in Technical Data, if not refer to Fault Finding section in Servicing Booklet. q Move the selector lever to the left hand position, remove the pressure gauge, replace test point screw and check for gas soundness. q Using a ball point pen, clearly indicate on the data label the value the boiler is set to.
Note : This adjustment does not affect the domestic hot water output.

Diagram. 59

Reg 001
Bypass The built-in bypass must be adjusted according to the requirements of the system. Refer to the flow rate pressure curve (diag. 19 p. 11) The boiler is supplied with the built-in bypass valve open half a turn. It is adjusted by turning the bypass screw (a diag. 60). Turn the screw clockwise to close the bypass. When using thermostatic radiator valves (TRV's), a separate adjustable bypass of 15 mm minimum diameter must be fitted between the flow and return of the heating circuit. Any bypass must be fitted before system controls. If desired the pump can be made to run when the burner is lit and will continue to run after burner extinction. This can be useful on certain installations that requireconstant heating water circulation. To change the pump operation to continuous, it is necessary to place the electrical jumper on the PCB in the C position, see diagram 61.

Diagram. 60

Diagram. 61
As the boiler is supplied, the pump operation is conventional, that is, the pump will operate when the burner is lit during a central heating demand.

Continuous pump

CHANGING GAS TYPE
Should it become necessary to change the gas type, a modification kit composing injectors, pilot assembly and factory set gas valve will be required. This modification can only be carried out by an authorized and suitable qualified engineer.

Reg 003

Reg 004

Reg 013

Le Technipole - 8, av. Pablo-Picasso - 94132 Fontenay-sous-Bois cedex Tlphone : (1) - Tlex : - Tlcopie : (1) 11 01

102740 D 08/96