Saunier Duval Bulex Ecosy SB 28E, Bulex Ecosy 28E, Bulex Ecosy 24E, Bulex Ecosy SB 24E Instructions Manual

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GAS VALVE (HONEYWELL)
IMPORTANT NOTE
THESE INSTRUCTIONS SUPERCEDE
THE GAS VALVE SETTING PROCEDURE CONTAINED
WITHIN THE ORIGINAL APPLIANCE LITERATURE.
MODEL
Ecosy SB 28E Ecosy 28E
KIT Pt. No. 05632900
incl. 1 off “O” ring 4 off screws
0020096286
MODEL
Ecosy 24E Ecosy SB 24E
KIT Pt. No. 05617100
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Requirements
It is the Law that any replacement of parts is carried out by a competent person approved at the time by the Health and Safety Executive. Before commencing with the replacement of a part the boiler should be isolated from the electrical supply and the gas supply should be turned off at the gas isolation valve. When replacing a part, use only spare parts that you can be assured conform to the safety and performance specication that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Saunier Duval. After electrical connections have been made, checks to the earth continuity, polarity, short circuit and resistance to earth must be repeated using a suitable multimeter. Unless stated otherwise, parts are replaced in the reverse order to their removal. After replacing these parts you MUST always test for gas soundness and carry out functional test of the controls and check the following:
General Inspection
After the replacement of a part, the following must be checked.
● The integrity of the flue system and flue seals.
● The integrity of the appliance combustion circuit and relevant seals.
● Electrical, gas and water connections.
● System pressure.
● the combustion performance, operational gas inlet pressure and gas rates. refer to the following procedure.
ALL MODELS
Refer to the installation and servicing instructions supplied with your boiler to t the replacement gas valve.
After assembly, test for gas soundness and purge in accordance with the current issue of BS6891 or in IE, the current edition of I.S.813 “Domestic Gas Installations”.
COMPETENCY TO CARRY OUT THE CHECK OF COMBUSTION PERFORMANCE
NOTE: BS 6798: 2009 Specication for installation
and maintenance of gas-red boilers of rated input not exceeding 70kW net advises that:
● The person carrying out a combustion measurement must be assessed as competent in the use of a ue gas analyser and the interpretation of the results.
● The ue gas analyser used should be one meeting the requirements of BS7927 or BS-EN50379-3 and be calibrated in accordance with the analyser manufacturers’ requirements.
● Competence can be demonstrated by satisfactory completion of the CPA1 ACS assessment, which covers the use of electronic portable combustion gas analysers in accordance with BS 7967, parts 1 to 4.
● Ensure that the gas analyser is set to the correct fuel setting.
Diagram 1
b
Diagram 2
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LPG MODELS - ONLY
Please refer to the specic instruction relating to your model and check/adjust the CO2 value, refer to table overleaf.
Gas valve setting
All gas valves are tested and factory set during manufac­ture. It should not be necessary to adjust the gas valve. NOTE: Safe combustion can only be verified by measuring CO/CO2 ratio. This must not exceed the value shown in the table overleaf.
● Shut down boiler.
● Connect a CO2 analyser to the combustion test point.
● Start the boiler.
● Press the «Mode» and «-» buttons simultaneously, the letter “L” is displayed and the boiler is now running at low gas ow rate. Allow the boiler to run for a few minutes to stabilise, refer to the CO2 setting table and check that the CO2 value is to specication, if adjustment is required, proceed as follows. NOTE: The adjustment should be made in 1/8 of a turn increments, waiting 1 minute to allow the appliance to stabilise.
● To adjust the CO2, remove protective cap (b) from the gas valve. Carefully turn the gas valve adjuster until the correct CO2 value is obtained according to table minimum column.
● Press the «Mode» and «+» buttons simultaneously the letter H is displayed and the boiler is now running at high gas ow rate.
● Allow the boiler to run for a few minutes to stabilise and check the CO2, refer to the CO2 setting table and check that the CO2 value is to specication.
● Check the CO/CO2 combustion ratio does not exceed the value in the table overleaf. If the CO2 or CO/CO2 combustion ratio are not as specied please refer to the “Completion” paragraph of these instructions.
Check the Gas Inlet Pressure and Gas Rate
On completion, test the gas installation for tightness using the pressure drop method and suitable leak detection uid, purge in accordance with the above standard. NOTE: Due to the modulating operation of the boiler and the need to check the gas inlet pressure and measure the gas rate at maximum rate, it will be necessary to force it to maximum.
Operational Gas Inlet Pressure
With ALL other gas appliances operating, check the operational supply pressure at the gas service isolation valve test point, refer to your Installation literature supplied with your appliance. The nominal supply pressure for Natural Gas (G20) is 20mbar. Turn the taps and appliances off, then disconnect the pressure gauge. Additionally the safe nominal maximum heat input of the appliance can be achieved at an inlet pressure down to 15mbar. NOTE: The BURNER PRESSURE cannot be measured and is not used to measure the gas rate.
Gas Rate
Make sure that ALL other gas burning appliances and pilot lights are off. NOTE: Press the «Mode» and «+» buttons simultaneously the letter “H” is displayed and the boiler is now running at high gas ow rate. Allow the boiler to run for a few minutes to stabilise and check the CO2. Check the gas rate using the gas meter test dial and stop watch, at least 10 minutes after the burner has lit, see table below for approximate rates. In communal or LPG installations where the gas rate cannot be measured it is acceptable to measure the combustion rate as described in the servicing section. On completion, reset the boiler to normal operation by referring to the Installation and Servicing Instructions.
Completion
If it is not possible to achieve the required results for either the combustion or gas rates, it will be necessary to complete a full service of the appliance and then repeat the combustion check procedure. If after servicing and adjustment of the appliance the combustion values are still unacceptable and after further remedial work has been carried out, the appliance must be disconnected until the CO/CO2 ratio is acceptable. Advice can be sought from the Saunier Duval Technical Helpline 01773 828400.
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Models SETTING - OUTPUT SETTING - OUTPUT MAX. GAS RATES Nat. Gas G20 - Case Off Nat. Gas G20 - Case On CO/CO2 Nat. Gas G20
OUTPUT MIN. 8.3 kW MAX. 28.0kW MIN. 8.3 kW MAX. 28.0kW
Ecosy SB 28E 9.0 - 9.4%CO2 9.2 - 9.6%CO2 0.004 3.0 m3/h
Ecosy 28E 9.0 - 9.4%CO2 9.2 - 9.6%CO2 0.004 3.0 m3/h
OUTPUT MIN. 6.8 kW MAX. 24.5kW MIN. 8.3 kW MAX. 28.0kW Ratio MAXIMUM
Ecosy SB 24E 9.0 - 9.4%CO2 9.2 - 9.6%CO2 0.004 2.6 m3/h
Ecosy 24E 9.0 - 9.4%CO2 9.2 - 9.6%CO2 0.004 2.6 m3/h
Models SETTING - OUTPUT SETTING - OUTPUT MAX.
Ratio MAXIMUM
Nat. Gas G30 - Case Off Nat. Gas G30 - Case On CO/CO2
OUTPUT MIN. 9.9 kW MAX. 20.4kW MIN. 9.9 kW MAX. 20.4kW
Ecosy SB 24E 10.0 -10.3%CO2 10.3 - 10.6%CO2 0.004
Ecosy 24E 10.0 -10.3%CO2 10.3 - 10.6%CO2 0.004
Models SETTING - OUTPUT SETTING - OUTPUT MAX.
Ratio
Nat. Gas G31 - Case Off Nat. Gas G31 - Case On CO/CO2
OUTPUT MIN. 11.4 kW MAX. 24.5kW MIN. 11.4 kW MAX. 25.4kW
Ecosy SB 24E 11.9 -12.1%CO2 12.3 - 12.5%CO2 0.004
Ecosy 24E 11.9 -12.1%CO2 12.3 - 12.5%CO2 0.004
Ratio
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0020096286-02 01.10
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