Saunier duval THELIA SB 23, THELIA 23, THELIA 23 E User Manual

Page 1
THELIA
THIS IS A CAT II2H3+ APPLIANCE
IN WARRANTY
TECHNICAL HELPLINE
01773 828400
01773 828100
1
Page 2
INSTALLATION AND OPERATING INSTRUCTIONS
Note!
The boiler serial number is marked on the label attached to the inside of the door. Refer to the
“Introduction” section page 3 for a description of the basic functions of the boiler. The “Users”
section describes how to safely operate the boiler.
USERS SECTION INSTALLATION SECTION
Introduction .................................................. Page 3
Commisioning ........................................................ 3
Controls & lighting ................................................. 4
Operation - Checks ............................................... 5
Clock - instructions for use ............................... 6 - 8
Draining................................................................... 9
Servicing/maintenance ........................................ 9
Introduction .................................................. Page 3
Technical data.............................................. 10 - 11
Dimensions ............................................................ 11
Boiler schematic ........................................... 12 - 13
Connection plate ................................................ 14
Piping system installation .................................... 15
Heating system design ........................................ 15
Hot water system design ..................................... 16
Boiler location ............................................... 16 - 17
Boiler installation .................................................. 18
Flue installation .............................................. 18 - 23
Electrical connection ................................... 24 - 25
Commissioning .............................................. 26 - 27
Operating safety devices ................................... 28
Settings ........................................................... 28 - 29
Changing gas type ............................................. 29
Mandatory warning notice for CEE countries
WARNING, this appliance was 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.
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Page 3
INTRODUCTION
The Thelia 23 and Thelia 23E range of boilers are wall mounted combination boilers providing cen­tral heating and instantaneous domestic hot wa­ter.
The Thelia SB23 boiler is a wall mounted boiler pro­viding central heating only. This boiler can be used in combination with a hot water tank to supply domestic hot water.
The boilers are of the II2H3+ Gas Category for use with natural gas (G20) as distributed in the United Kingdom or with butane or propane gas (G30/31).
These instructions should be carefully followed for the safe and economical use of your boiler.
Once the pilot has been lit (Thelia 23 and Thelia SB23 only) the boiler is automatic in operation.
The boilers have a fan assisted balanced flue which both discharge the products of combustion to and draws the combustion air from the outside air. The boiler is supplied for rear outlet flue connection. Alternatively, the boiler is designed to allow the flue system to be connected to the top of the boiler, top outlet flue connection. Refer to the flue fitting instructions.
The boilers can be installed on either an external wall or on an adjacent inside wall, that is, the flue system will pass directly to the rear or to either side to the terminal fitted on the outside wall face.
Ancillary equipment
A range of accessories are available including, ver-
tical flue coponents, bends ....
For further information contact your supplier.
Boilers burning LPG or similar gas MUST NOT be fitted in basements or below ground level.
COMMISSIONING
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.
Gas leak or fault
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.
Boiler controls
The control panel, located at the lower front of the boiler casing allows the boiler to be started, shut down, controlled and monitored during use, see diagram 2 (Thelia 23 and Thelia 23E) or dia­gram 3 (Thelia SB23).
Flue
Do not obstruct the outside terminal of the boiler. Note. At stand-by, the boiler fan will run at low speed, this is quite normal.
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.
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Page 4
CONTROLS AND LIGHTING
Lighting the THELIA 23 and THELIA SB 23 boilers
1 - Push in and hold
1 / ON
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.
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
Lighting the THELIA 23 E boiler
Push in and release
Diagram. 1
OPENING THE CONTROL PANEL COVER
Hab 129
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.
Diagram. 2
Diagram. 3
1 / ON
6
Hab 130
BOILER CONTROL PANEL THELIA 23, THELIA 23 E
5
4 3 2 1 0
bar
7
70
50
90
30
110
30
BOILER CONTROL PANEL THELIA SB 23
6
7
5
4
4
2
2
1
0 / OFF
1 / ON
1
Hab 043a
0 / OFF
4 3 2 1 0
bar
70
50
90
30
110
1 / ON
Hab 044a
4
Page 5
OPERATION - CHECKS
THELIA 23, THELIA 23 E
HEATING + HOT WATER
Place the selector lever (diagram. 4)
to position (winter). In this position the domestic hot water will have PRIORITY.
Diagram. 4
Hab 128
Hot water : Turn the
knob (diagram. 5) in or­der to obtain a water temperature suited to the demand.
Diag. 5
Reg 012
THELIA SB 23
HEATING ONLY
Turn the selector switch (diagram. 8)
to position (winter).
Diagram. 8
Hab 131
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
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.
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.
STOPPING THE BOILER
Press the (O/OFF)
push-button (dia­gram. 7) : this will clo-
se OFF the gas supply valve. Electrical power supply to the boiler will be automatically swit­ched OFF.
Diag. 6
Reg 012
Diag. 7
Hab 133
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.
ALTERNATIVE OPERATING MODE THELIA SB 23
You may select the operating mode using the switch (diagram. 8) :
Winter Heating only Summer Domestic hot water only mode.
The boiler will keep the separate storage cylinder, where fitted, at the desired temperature.
Winter Heating and domestic hot water
mode
STOPPING THE BOILER
Press the (O/OFF)
push-button (dia­gram. 10) : this will clo-
se OFF the gas supply valve. Electrical power supply to the boiler will be automatically swit­ched OFF.
Diag. 10
Hab 133
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Page 6
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.
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.
Using the " the correct time in twenty four hour format, for example, 1300 for 1pm, see diagram 12.
Helpful Hint
The " times. Press and release for small changes. If you press and hold down the time will "run".
"and " " buttons, set the display to
" and " " buttons are used to change
12.00
Saunier Duval
on
off enter
Diagram. 11
13.00
Saunier Duval
on
off enter
C1
AUTO
TIMER
C1
AUTO
TIMER
res
res
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.
6
Diagram. 12
Saunier Duval
on
off enter
Diagram. 13
7.50
ON
C1
AUTO
TIMER
res
Page 7
CLOCK - INSTRUCTIONS FOR USE
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 " "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.
" and " " buttons, change the first
Diagram. 14
6.30
Saunier Duval
on
off enter
ON
C1
AUTO
TIMER
res
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 "
" button, see diagram 16.
" The series of dashes are between times 23.59 and
0.00.
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.
" and
Saunier Duval
on
off enter
Diagram. 15
8.30
-.--
OFF
ON
C1
AUTO
TIMER
C1
AUTO
TIMER
res
Saunier Duval
on
off enter
Diagram. 16
res
7
Page 8
CLOCK - INSTRUCTIONS FOR USE
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.
- H
Saunier Duval
OFF
C1 AUTO TIMER
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.
Using the " time required.
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.
" and " " buttons, set the “Hold”
on
off enter
Diagram. 17
Saunier Duval
on
off enter
Diagram. 18
13
OFF
C1
AUTO
TIMER
res
res
8
Page 9
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.
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Page 10
TECHNICAL DATA
THELIA SB 23
THELIA 23 E
THELIA 23
Heating useful output, adjustable from... (kW) 8,9 8,9 8,9
Efficiency (%) 82,3 82,3 82,3 Heating max. output temperature (°C) 87 87 87 Heating regulation adjustable by user between 30 and 87°C Heating system expansion vessel, effective capacity (l) 6,5 6,5 6,5 System max. capacity at 75°C (l) 140 140 140 Safety valve, maximum service pressure (bar) 3 3 3 Products outlet (Ø) 60 60 60
Fresh air inlet (Ø) 100 100 100 Output in hot water mode, automatically variable from... (kW) 8,9 8,9
Max. hot water temperature (°C) 65 65 Operating threshold flow rate in sanitary hot water mode (l/min.) 3 3 — Specific flow rate (for 30°C temperature rise) (l/min.) 11 11 — Mini. supply pressure (bar) 0,3 0,3 — Max. supply pressure (bar) 10 10 — Electrical supply (V) 230 230 230 Amperage (A) 0,73 0,73 0,73 Max. power absorbed (W) 130 130 130
(BTU/H) 30,000 30,000 30,000
to... (kW) 23,3 23,3 23,3
(BTU/H) 80,000 80,000 80,000
(BTU/H) 30,000 30,000
to... (kW) 23,3 23,3
(BTU/H) 80,000 80,000
Ø Pilot injector (mm) 0,28 0,28 Ø Burner injector (mm) 1,20 1,20 1,20 Inlet pressure (mbar) 20 20 20
(G20)
Gas rate (maximum) (m3/h) 2,70 2,70 2,70
Natural Gas
Gas rate (minimum) (m3/h) 1,13 1,13 1,13 Ø Pilot injector (mm) 0,18 0,18 Ø Burner injector (mm) 0,73 0,73 0,73 Inlet pressure (mbar) 29 29 29
(G 30)
Butane
Gas rate (maximum) (kg/h) 2,01 2,01 2,01 Gas rate (minimum) (kg/h) 0,84 0,84 0,84 Ø Pilot injector (mm) 0,18 0,18 Ø Burner injector (mm) 0,73 0,73 0,73 Inlet pressure (mbar) 37 37 37
(G31)
Gas rate (maximum) (kg/h) 1,98 1,98 1,98
Propane
Gas rate (minimum) (kg/h) 0,83 0,83 0,83 Ø Pilot injector (mm) — Ø Burner injector (mm) 2,40 — Inlet pressure (mbar) 8
(G130)
Gas rate (maximum) (m3/h) 3,88
Town gas
Gas rate (minimum) (m3/h) 1,63
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Page 11
TECHNICAL DATA
Burner pressure (mbar)
(kW) 8,9 10 11 12 13 14 15 16 17 18 19 20 21 22 23,3
(Btu/h) 30387 34142 37557 40971 44385 47799 51214 54628 58042 61456 64871 68285 71699 75113 79552
(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) 40678 44631 48410 52326 56042 59742 63794 67819 71897 75872 79910 83836 87545 91412 96602
GAS
G 20 (mbar) 1,8 2,2 2,6 3,1 3,5 4,0 4,5 5,1 5,8 6,4 7,1 7,8 8,5 9,3 10,4 G 30 (mbar) 4,1 5,0 5,9 6,8 7,8 8,9 10,2 11,5 12,9 14,4 15,9 17,5 19,1 20,9 23,3 G 31 (mbar) 5,3 6,4 7,5 8,7 10,0 11,4 13,0 14,7 16,5 18,4 20,4 22,4 24,5 26,7 29,8
G 130 (mbar) 0,5 0,6 0,7 0,8 0,9 1,0 1,2 1,3 1,5 1,7 1,8 2,0 2,2 2,4 2,7
Pump
The performance of the pump, running at maximum speed, varies according to the pump bypass setting, see diagram
19.
Heat output
Heat input
by pass fully closed
5
open 1 turn
4
open 2 turns
open 3 turns
3
by pass fully open
2
1
Pressure loss between flow and
return boiler connections (metres head)
0
500 1000
Water flowrate (l/h)
Diagram. 19
Pom 023
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
OPENING THE CONTROL PANEL COVER
Hab 129
802
234
410
857
623
Hab 132
378
11
Page 12
BOILER SCHEMATIC
THELIA 23, THELIA 23 E
1-"ON" push - button. 2-"OFF" push - button. 3-Spark generator. 4-Central heating water
temperature adjustment.
5-Temperature gauge. 6-Pressure gauge. 7-Summer - Winter lever. 8-Expansion vessel.
9-Pump. 10 - Automatic air vent. 11 - Burner. 12 - Heat exchanger air vent. 13 - Heat exchanger. 14 - Multi - functional control.
23
22
13
15 - Safety electrovalve (THELIA 23 E only). 16 - Hight limit thermostat. 17 - Ignition electrode. 18 - Pilot (not THELIA 23 E) 19 - Hot water thermistor. 20 - Flame sense electrode (THELIA 23 E only). 21 - Loss of water switch. 22 - Fan. 23 - Airflow switch. 30 - Domestic hot water
temperature adjustment.
A-Heating return B-Cold water C-Heating flow D-Domestic hot water out F- Gas inlet
19
18
17
Diagram. 21
12
20
11
10
30
21
16
15
14
6
9
8
7
5
3
2
1
4
AB
CD
F
Shy 067a
12
Page 13
BOILER SCHEMATIC
THELIA SB 23
1-"ON" push - button. 2-"OFF" push - button. 3-Spark generator. 4-Central heating water
temperature adjustment.
5-Temperature gauge. 6-Pressure gauge. 8-Expansion vessel.
9-Pump. 10 - Automatic air vent. 11 - Burner. 12 - Heat exchanger air vent. 13 - Heat exchanger.
23
14 - Multi - functional control. 16 - Hight limit thermostat. 17 - Ignition electrode. 18 - Pilot 19 - Hot water thermistor. 21 - Loss of water switch. 22 - Fan. 23 - Airflow switch.
A-Heating return C-Heating flow F- Gas inlet
19
Diagram. 22
22
13
12
11
10
16
21
18
17
14
6
5
9
8
4
3
2
1
A
C
F
Shy 068a
13
Page 14
CONNECTION PLATE
Diagram. 23
THELIA 23, THELIA 23 E
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
A
4 - Plastic filter 5, 6 & 7 - Black graphite
2
1
3
B
C
113
m
p
4
r
5
D
q
6
7
F
34
55
25
55
57,5
57,5
33
Pla 105a
23
s
E
THELIA SB 23
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
2
1
A
C
113
m
p
r
5
q
7
F
25
110
115
Pla 116a
23
s
E
14
Page 15
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
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
recommended that the supply is connected using 22 mm pipe wherever possible.
On completion the gas installation must be tested
using the pressure drop method and purged in accordance with the current issue of BS6891
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.
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.
Diagram. 24
Ins 016b
HEATING SYSTEM DESIGN
The boilers are compatible with any type of
installation.
Heating surfaces may consist of radiators,
convectors or fan assisted convectors. Caution : if the materials used are of different types, corrosion phenomena may develop. In such case, adding a corrosion inhibitor in heating system water is recommended, in the propor­tions specified by the manufacturer, to prevent gas and oxide formation.
Pipe sectional areas shall be determined in
accordance with normal practices, using the output/pressure curve (diagram. 19). The distri- bution system shall be calculated in accordance with the output corresponding to the actual system demand, not the maximum output of that the boiler. However, provision shall be made to ensure sufficient output so that the temperature difference between the flow and return pipes be less than, or equivalent to 20°C. The minimum flow is 500 l/h.
The piping system shall be routed so as to avoid
any air pockets and facilitate permanent venting of the installation. Bleed fittings shall be
provided at every high point of the piping system and on all radiators.
The total volume of water permitted for the
heating system depends, amongst other things, on the static head in cold condition. The expansion vessel integrated into the boiler is pressurised at 0.5 bar in the delivered condition (corresponding to a static head of 5 m WG) and allows a maximum volume of 140 litres for an average temperature of 75°C in the radiator system, and a maximum ser­vice pressure of 3 bar. This pressure setting can be modified at boiler commissioning stage if the static head is different.
Provision shall be made for a drain valve at
system's lowest point.
Where thermostatic valves are fitted, not all
radiators must be equipped with this type of valve and particulary where the room thermostat is installed. In the case of an existing installation, it is essential that the radiator system be thoroughly flushed prior to installing the new boiler.
15
Page 16
DOMESTIC HOT WATER SYSTEM DESIGN
Copper tubing must be used for the domestic
hot water system. Unnecessary pressure losses should be avoided.
The boiler may operate with a minimum supply
pressure of 0.3 bar, but under reduced flow rate. Best operating comfort will be obtained from a supply pressure of 1 bar.
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.
In some installations it will be necessary to pro-
vide a means of accommodating expansion water. A domestic hot water expansion vessel is available as an accessory from your supplier.
BOILER LOCATION
Diagram. 25
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.
255 mini
29
50
mini
234
60
Ins 012a
16
Page 17
BOILER LOCATION
Diagram. 26
Minimum dimensions (in mm) for the positioning of flue terminals
A-under a window ........................................................................................ 600
B-under an air vent ....................................................................................... 600
C-under a gutter ............................................................................................ 300
D-under a balcony........................................................................................ 300
E-from an adjacent window ....................................................................... 400
F-from an adjacent air vent ........................................................................ 600
G-from vertical or horizontal air pipes ........................................................... 600
H-from an external corner of the building ................................................. 300
I-from an internal corner of the building................................................. 1000
L-from the ground or from another floor ....................................................... 1800
M-between two terminals vertically ......................................................... 1500
N-between two terminals horizontally ...................................................... 1000
G
O
P
C
N
E
F
M
A
B
D
I
H
L
Ven 060a
17
Page 18
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.
Diagram. 27
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.
Engage boiler upper part onto the retaining strip
(diagram 27).
Allow the boiler to seat down into position onto
the support plate (diagram 28).
Fit the filter and washers, strictly adhering to the
sequential order and directions shown on diagram
23. Connect the various couplings between the
boiler and connection plate.
Diagram. 28
Ins 020
REAR OUTLET FLUE ASSEMBLY
The boiler is supplied for rear outlet flue connec­tion. Alternatively, the boiler is designed to allow the flue system to be connected to the top of the boiler, top outlet flue connection. For top outlet flue installation refer to "Top outlet
flue".
Rear outlet flue - Kit 104294
The rear outlet flue system consists of two parts, a PVC outer pipe and an aluminium inner, they are positively locked together when assembled.
The flue kit 104294, see diagram 29, is 750 mm long and comprises :
- Outer PVC pipe ................................................... A
- Inner aluminium pipe ........................................... B
- External rubber sealing collar ............................ C
- Rubber connecting sleeve................................. D
- Flue elbow ............................................................. E
- Internal rubber flange .......................................... F
A - Direct rear outlet flue
Mark correct position of hole from template using hole between hook and connecting plate.
B - Rear outlet side flue
Mark the horizontal centre line for the hole on the rear wall. Extend the horizontal centre line to the side wall and mark the vertical centre line of the flue hole as shown in diagram 30.
Ins 021
18
Page 19
REAR OUTLET FLUE ASSEMBLY
e
a
X
Important : when cutting the flue hole and when extending the flue centre line to a side wall remember that the flue system must have a fall of about 35 mm per metre of flue DOWNWARD from the boiler. There must NEVER be an upward incline.
From the back of the boiler, loosen the screws holding the two flue connector clamps (diag. 31) and slide them away from flue outlet.
Remove straight flue connector and fit elbow (E) into rear of the boiler, fitting flush end of elbow into position and tighten screws, see diag. 32.
Diagram. 30
255 mini
234
50
mini
60
29
Diagram. 29
E F D C B A
Pho 086
Diagram 31
Pho 025
Ins 012a
Cutting the flue hole
Making allowance for the slope of the flue, cut the hole in the external wall, preferably using a 115 mm diameter core drill. If necessary, make good at both the inner and outer surface of the wall. Important : before cutting the hole for flues directly to the rear of the boiler, always cover the fixing jig to make sure it is not damaged.
Calculation of flue cutting lengths
Measure the wall thickness e (mm).
Diagram 33
Diagram 32
Pho 026
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
e
a
X
Hab 208
Hab 209
19
Page 20
REAR OUTLET FLUE ASSEMBLY
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.
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 PVC aluminium Comments
Back outlet e + 70 e + 195 maximum
Rear flue wall thickness "e"
Back outlet e + a + 35 e + a + 155 maximum
Side flue to left distance "X"
(diagram 5) without
Back outlet e + a + 90 e + a + 215 maximum
Side flue to right distance "X"
(diagram 6) without
Cutting length (mm)
outer pipe inner pipe
without
extension 511 mm
extension 797 mm
extension 739 mm
Diagram 35
Locking fitting end
Diagram 36
Table 2
Flue option Dimension "X" N° of
Side flue 797 to 1527 mm 1
(left) 1527 to 2257 mm 2
Side flue 739 to 1469 mm 1
(right) 1469 to 2199 mm 2
PVC pipe
Cutting length
Aluminium pipe
Cutting length
AB
extension kits
Ven 083
DC
Ven 084
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.
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.
Important : all cutting lengths should be measu-
red 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
Aluminium extension pipe
Fixing screws
Connector
Aluminium
flue pipe
Ven 085
20
Page 21
REAR OUTLET FLUE ASSEMBLY
Diagram 38
Aluminium pipe Extension aluminium pipe
Cutting lenght
Locking fitting end
PVC pipe Extension PVC pipe
Cutting lenght
Ven 086
Installation of flue assembly
Fit the PVC pipe (A) into the wall with locking
fitting end to outside.
Fit the rubber sealing collar (C) into the groove
at the outer end of the PVC pipe.
Pull the PVC pipe inwards to bring the rubber
sealing collar hard against the external wall, see diagram 40.
Spot drill two holes using a 2.5 mm drill through
the flange and PVC pipe.
Fasten the flange to the PVC pipe using the two
self tapping screws provided.
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.
Fit the rubber connecting sleeve (D), plain end
first, onto the end of the PVC pipe. Push it on as far as possible.
Lift the boiler and engage both fixing jig hooks
in the two support brackets on the back of the boiler.
Lower the boiler until it rests on the outward
facing lip at the centre of the connecting plate.
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.
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.
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.
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 39
Diagram 40
Diagram 41
2
1
A
B
Diagram 42
Extension aluminium pipe
This dimension must be 30 mm or greater
Extension PVC pipe
3
1
1
m
p
4
3
r
5
q
6
C
7
D
F
23
s
E
Ven 087
Pho 087
55
55
4
3
57,5
25
57,5
3
3
Pla 105a
Ven 088a
21
Page 22
TOP OUTLET FLUE ASSEMBLY
Top outlet flue - Kit 85089
The boiler is supplied for rear outlet flue connec­tion. For a top outlet flue :
Unscrew and remove the four screws and cir-
cular blanking plate from the top of the boiler.
From rear of boiler, unscrew and remove four
screws securing flue elbow clamps (J) to the rear outlet.
Remove straight flue connector (K), plastic
adaptor (L) and angled connector (M) and dis­card, see diagram 43.
Fit circular blanking plate, previously removed
from top of boiler, onto rear outlet of boiler.
Disconnect power supply and earth leads from
fan motor. Unscrew and remove the two fan re­taining screws, see diagram 44.
Remove fan assembly from boiler.
Unscrew and remove the three screws holding
fan to mounting plate. Turn the fan body through 90 degrees in relation to the mounting plate to leave fan outlet pointing upward.
Using the alternative set of three holes in the
mounting plate, fasten the fan to the mounting plate, see diagram 45.
Disconnect air pressure switch tube from rear
pressure tapping point and connect to pressure tapping point at top of boiler.
Refit fan assembly into boiler.
Fit the two retaining lugs at the back edge of
fan mounting plate onto back edge of flue hood opening and bring fan mounting plate up against flue hood.
Refit the two fixing screws.
Reconnect power supply and earth leads to fan,
the polarity is not important.
Diagram 43
L
K
M
J
Diagram 44
Diagram 45
Pho 025
Pho 032
Pho 034
To fit the flue proceed as follows :
The flue kit 85089, see diagram 46, is 750 mm long and comprises:
- Outer pipe ...........................................................N
- Inner pipe ........................................................... O
- External rubber sealing collar............................ P
- Plastic flange...................................................... Q
- Clamp and seal .................................................. R
- Gasket ................................................................. S
- 2 ‘O’ rings ............................................................. T
- 4 screws ............................................................... U
- Elbow ...................................................................V
Cutting the flue hole
Follow the procedure described in the instructions for the rear outlet flue.
22
Diagram 46
RTSNQOP U
V
Pho 088
Page 23
TOP OUTLET FLUE ASSEMBLY
Calculation of flue cutting lengths
Measure the wall thickness e (mm) For side flues, measure distance from inside face of the side wall to the centre line of the boiler and subtract 205mm to get dimension a (mm), see dia- gram 47. Refer to table 3 for the cutting lengths of both the inner and outer flue pipes for each of the various flue options available. Important : All flue cutting lengths must be measu­red from the terminal end of the flue pipes, see diagram 49. When the dimension X measured on site is greater than that given in table 3, a flue extension kit will be required, refer to table 4 for details.
Installation of flue assembly
Fit the rubber sealing collar (P) into the groove
at the outer end of the pipe (N).
Fit the outer pipe (N) into the wall with the groo-
ve to the outside.
Pull the pipe inwards to bring the rubber sealing
collar hard against the external wall, see diagram
40.
Lift the boiler and engage both fixing jig hooks
in the two support brackets on the back of the boiler.
Lower the boiler until it rests on the outward fa-
cing lip at the centre of the connecting plate.
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.
Fit the internal plastic flange (Q). Push it along
the pipe until hard against the internal wall, see diagram 48.
From inside, insert inner pipe (O) into the outer
pipe.
Fit both ‘O’ rings (T) into the flue elbow, one at
the inlet, one at the outlet. By necessity they are a loose fit, apply a small amount of silicone grease to each ‘O’ ring when fitting.
Slacken the two screws and fit the clamp and
seal (R) onto the elbow.
Take hold of the inner flue and push gently into
the elbow outlet taking care not to tear the ‘O’ ring. Important : if the flue has been cut, ensure that
there are no burrs that could damage the ‘O’ ring.
Push the elbow clamp and seal over the outer
flue.
Using the gasket supplied (S) fit the elbow onto
the boiler and secure in position with four screws.
Tighten clamp screws.
Diagram 47
L2L1
a
X
Table 3
Flue option PVC aluminium Comments
Top outlet e + 144 e + 224 maximum
Rear flue wall thickness "e"
Top outlet e + a + 115 e + a + 195 maximum
Side flue distance "X"
(right or left) without
Table 4
Flue option Dimension "X" N° of
Side flue 745 to 1745 mm 1
(right or left) 1527 to 2745 mm 2
Diagram 48
Diagram 49
Cutting length (mm)
outer pipe inner pipe
Outer pipe
Cutting length
L2L1
ee
a
X
without
extension 511 mm
extension 511 mm
extension kits
Terminal end
Inner pipe
Cutting length
Hab 210
Pho 089
Ven 089
23
Page 24
ELECTRICAL CONNECTION
WARNING. This boiler must be earthed. All system components shall be of an approved type.
Connection of the whole electrical system and any heating system controls to the electrical supply must be through a common isolator.
Isolation should preferably be by a double pole switched fused spur box having a minimum con­tact separation of 3 mm on each pole. The fused spur box should be readily accessible and preferably adjacent to the boiler. It should be identified as to its use.
Connect the integral supply lead, coiled and tucked behind the boiler, to the mains supply. Important : The integral mains supply lead is specific to the boiler. A replacement can be obtained by quoting part number 57037.
A fused three pin plug and socked outlet may be used instead of the fused spur box provided that, a) They are not used in a room contaning a fixed bath or shower b) Both the plug and socket comply with the current issue of BS 1363.
The mains electrical supply must be maintained at all times in order to provide correct operation of the boiler.
Do not interrupt the supply with a time switch or programmer.
WARNING. ON NO ACCOUNT MUST ANY EXTER­NAL VOLTAGE BE APPLIED TO ANY OF THE TERMI­NALS ON THE HEATING CONTROLS CONNECTION PLUG.
Warning : This appliance must be wired in accord-
ance with these instructions. Any fault arising from incorrect wiring cannot be put right under the terms of the Saunier Duval guarantee.
Thelia 23 and Thelia 23E only - clock models
The boiler will work for heating without a room thermostat being connected provided that the
wire link fitted between the top two terminals of the connector is left in place, see diagram 50a. A 230V room thermostat can be used but do not make any connection to the thermostat compen­sating resistor, see diagram 50a. ON NO ACCOUNT must any electrical voltage be applied to any of the terminals of the external con­trols plug.
Thelia 23 and Thelia 23E only - non-clock models
The boiler will work for heating without a room ther­mostat and/or timeswitch being connected pro­vided that the wire link fitted between the top two terminals of the connector is left in place, see dia­gram 50a. A 230V room thermostat can be used but do not make any connection to the compensating resis­tor, see diagram 50a. ON NO ACCOUNT must any electrical voltage be applied to any of the terminals of the external con­trols plug. For use with a timeswitch or timeswitch and room thermostat see diagram 50a.
Thelia SB23 only
The boiler will work for heating without a room ther­mostat and/or timeswitch being connected pro­vided that the wire link fitted between the top two terminals of the connector is left in place, see dia­gram 50b. A 230V room thermostat can be used but do not make any connection to the compensating resistor, see diagram 50b. ON NO ACCOUNT must any electrical voltage be applied to any of the terminals of the external con­trols plug.
A voltage free storage cylinder thermostat, where fitted, should be connected to the lower two termi­nals of the external controls plug, see diag. 50b. ON NO ACCOUNT must any electrical voltage be applied to any of the terminals of this plug.
All models
In case of difficulty obtaining a suitable timeclock/ room thermostat, a programmable room thermo­stat is available as an accessory, Saunier Duval part number 40010. Please contact your supplier.
24
Page 25
ELECTRICAL CONNECTION
Diagram. 50a
EXTERNAL CONTROLS CONNECTIONS
THELIA 23, THELIA 23 E
No external controls No external controls
Boiler connector
Room thermostat only
External controls plug
Room thermostat and time clock
Time clock
Factory fitted link
Voltage free room thermostat
Do not connect
Voltage free room thermostat
Diagram. 50b
EXTERNAL CONTROLS CONNECTIONS THELIA SB 23
Factory fitted link
Room thermostat only
External controls plug
Timeclock, room thermostat and cylinder thermostat
External controls plug
Time clock
Voltage free room thermostat
Do not connect
Voltage free room thermostat
External controls plug
Do not connect
Voltage free cylinder thermostat
Do not
connect
sch 070 UK
25
Page 26
COMMISSIONING
The commissioning and first firing of the boiler must only be done by a competent person.
Gas installation
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).
Isolate boiler from the electrical supply
THELIA 23 and THELIA SB 23
Disconnect the supply pipe from the pilot injector
tube by unscrewing nut.
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.
Immediately release black button and
reconnect pipe to pilot injector tube. DO NOT OVERTIGHTEN NUT.
Check for gas soundness with black button
pushed in.
THELIA 23E
Remove screw from inlet test point at rear of
multi-functional control.
Push in and hold black (ON) button until gas is
present at the inlet test point.
Immediately release black button and replace
screw to inlet test point.
Check for gas soundness with black button
pushed in.
Filling the system
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.
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.
Do not close the pump bleed plug.
Open the various water taps to bleed the system
Make sure that pressure gauge pointer reads
between 1 and 2 bar.
Diagram. 51
Diagram. 52
Diagram. 53
m qrp
Diagram. 54
Hab 128
Hab 131
Ins 017a
Diagram. 55
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.
Set the room thermostat for the maximum tem-
perature and check that any external controls, if fitted, are calling for heat.
26
Reg 008
Reg 007
Page 27
COMMISSIONING
Turn the knob (dia-
gram. 56) to switch the
Diagram. 56
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
Reg 012
turn OFF.
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.
Refill the system to a pressure of 1 bar and vent
as before.
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.
the given figure, check the gas inlet pressure as follows:
Shut down boiler.
Remove screw from inlet test point at rear of
multi-functional control.
Connect a suitable pressure gauge.
Start boiler as described in ‘Instructions for Use’
Check that the inlet pressure reading on the
gauge matches that given in ‘Technical Data’ for the type of gas being used.
Shut down boiler.
Remove the pressure gauge, replace test point
screw and check for gas soundness.
If the gas pressure is incorrect, refer to the Fault
Finding section in servicing instructions.
If inlet pressure is below that given, the gas sup-
ply pipework/meter must be checked and any fault corrected.
In the case of an LPG installation, check the stor-
age 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 :
Shut down boiler.
Remove screw from test point on main burner,
below sealed chamber of boiler (see diag. 57).
Connect a suitable pressure gauge.
Set selector lever to right hand, heating and hot
water position.
Start boiler as described in ‘Instructions for Use’
Set control thermostat to maximum, fully
clockwise, and check that any external controls are calling for heat.
Check that the reading on the gauge matches
that given in ‘Technical Data’ for the type of gas being used.
Move the selector lever to the left hand position,
remove the pressure gauge, replace test point screw and check for gas soundness.
If measured burner pressure differs greatly from
Des 044
27
Page 28
OPERATING SAFETY DEVICES
Air flow rate safety device
If an obstruction, even partial, of the flue occurs for any reason whatsoever, and causes reduction of the air flow rate, the built-in safety system of the boiler will be tripped: the burner will turn OFF and the fan will continue to run. The boiler will be ready to operate when the fault has been cleared.
Gas leak or fault
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.
In case of power supply failure
The boiler no longer operates. As soon as power supply is restored, the boiler will be automatically re-started.
Overheating safety
This safety device causes safety shutdown of the boiler. If this happens, call the nearest after sales service department.
Important notice : a central heating system can­not operate satisfactorily unless it is properly filled with water, and unless the air initially contained in
the piping systems has been properly bled off. If these conditions are not satisfied, air noise will oc­cur within the system.
In case of loss of water in the system
CAUTION. The boiler is installed as part of a sealed system which must only be drained and filled by a competent person. If the pressure shown on the pressure gauge (diag.
58) is less than 1 bar, the system must be filled-up immediately. Call the nearest after sales service department.
Air in the heating system
Persistent air in the heating system may indicate leaks in the system or corrosion taking place. Call the nearest after sales service department.
Diag. 58
Hab 128
Setting the heating output
The heating output of the boiler can be set between the minimum and maximum values given in the Technical Data, page 10.
Connect a suitable pressure gauge to the main
burner test point as described previously.
Set control thermostat to maximum, that is,
turned fully clockwise.
Check that all external controls are calling for
heat.
Start the boiler.
Adjustment is made using a small electrical screwdriver to adjust the potentiometer (diagram.
59) situated on the lower front panel. Turn the potentiometer clockwise to increase the burner pressure, anti clockwise to decrease.
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.
Move the selector lever to the left hand posi-
tion, remove the pressure gauge, replace test point screw and check for gas soundness.
SETTINGS
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
28
Page 29
SETTINGS
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
a
Reg 013
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.
Reg 003
Continuous pump
Reg 004
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.
29
Page 30
303132
Page 31
Page 32
“Le Technipole” - 8, av. Pablo-Picasso - 94132 Fontenay-sous-Bois cedex
Téléphone : (1) 49 74 11 11 - Télex : 262 958 - Télécopie : (1) 49 74 11 01
102740 D 08/96
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