Related Manuals for Johnson & Starley SCT 75-75 G
Summary of Contents for Johnson & Starley SCT 75-75 G
- Page 1 SCT 75-75 G MODEL SCT 100-95 G INSTALLATION- AND USER INSTRUCTIONS UNITED KINGDOM / IRELAND WATER STORAGE HEATERS...
- Page 2 Read these installation instructions first before installing the appliance. Carefully read the user instructions before igniting the appliance. Failure to follow these instructions may lead to risk of explosion and/or fire and could cause material damage and/or bodily harm. Installation and commissioning should be carried out by a qualified competent installer. The type of gas and the value at which the appliance is set standard in the factory are registered on the rating plate.
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Page 3: Table Of Contents
CONTENTS PAGE General ......................5 Description of the appliance ................5 Technical safety equipment ................6 Technical description ..................8 1.3.1 Dimensions ....................8 1.3.2 Technical data ..................... 10 For the installer ..................11 Installation instructions ................11 2.1.1 Installation .................... - Page 4 Drawing 1 - Cross-section of the appliance 1) Draught diverter T&P safety connection 2) Hot water outlet Steel jacket 3) Insulation material 10) Flue baffle 4) Flue tube 11) Sacrificial anode 5) Glass lined tank 12) Drain tap 6) Gas control valve 13) Atmospheric burner 7) Cold water inlet pipe...
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Page 5: General
1. GENERAL for pipes with an inside diameter exceeding 25 mm. maximum dead leg Description of the 3.0 metres. appliance Construction of the water heater is in accordance with the European standard for gas heated water storage heaters for sanitary application (EN 89). The appliance thus meets the European Directory for Gas Appliances and is therefore entitled to carry the CE-... -
Page 6: Technical Safety Equipment
Technical safety Flue down draught safety device equipment The heater is fitted with a flue gas blowback safety device. The Gas control block functioning of the safety device is The water heater has been fitted with a based upon the principle of the Thermal gas control block consisting of a Reflux Safeguard –... - Page 7 It is the aim of the T.R.S. to prevent flue gasses from the water heater entering the room where the water heater has been placed, instead of passing through the flue to outside atmosphere. The thermo-couple circuit is interrupted and the gas supply is disconnected as soon as the T.R.S.
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Page 8: Technical Description
Technical description 1.3.1 Dimensions These water heaters are only suitable for a flue tube with minimal the announced diameter (dimension G). SCT 75-75 SCT 100-95 Dimensions 1585 1780 1450 1640 1505 1685 1505 1685 1280 1460 Cold water inlet Hot water outlet Gas control Drain valve T&P relief valve tapping... - Page 9 Drawing 3 - Dimensions...
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Page 10: Technical Data
1.3.2 Technical data Device category: II2H3+ Description Unit SCT 75-75 SCT 100-95 DATA NATURAL GAS G20 - 20 mbar Nominal load (gross) 25.1 26.7 Nominal capacity 19.2 20.4 Supply pressure mbar Burner pressure mbar 12.5 Gas consumption * 2.40 2.50 Diameter main orifice 3.90 4.50... -
Page 11: For The Installer
2. FOR THE INSTALLER Some chemicals produce vapours which can cause rapid failure of Installation instructions thermocouples, burners and storage tanks if they are drawn into the combustion air supply. This water heater must be fitted in a Therefore if this water heater will be location which will permit the provision used to supply hot water to: of an approved flue system and... -
Page 12: Gas Connection
1) Gas cock 2) Stop valve 3) Expansion vessel 4) T&P safety valve 5) Non return valve 6) Circulation pump 7) Drain valve 8) Pressure limiting valve 9) Pressure relief valve A ) Gas supply B) Hot water outlet C) Cold water inlet D) Hot wayer outlets E) Return circulation loop Drawing 4 - Connection diagram... -
Page 13: Flue System
2.1.4 Flue system The water heater should be fitted with a flue system connected to the draught diverter. The flue pipe should rise for at least 50 cm. vertically before the inclusion of any bends. If a horizontal run of flue is required this should be kept to the minimum length possible and incorporate a rise of 6 cm. -
Page 14: Commissioning
Commissioning 4. Keep the control knob pushed-in and press the piezo-ignitor several times Filling the water heater until the pilot burns (see drawing 6); 1. Close the drain tap. 5. Keep the control button ( ) pushed- 2. Open the cold water tap to the water in for approximately 20 seconds. -
Page 15: Pilot Adjustment
Pilot adjustment Temperature regulation The pilot can be adjusted by means of The appliance is under water supply the regulating screw under the plastic pressure (maximum 8 bar). The amount cover on the right hand side of the gas of cold water that is added is equal to control block (see drawing 7). -
Page 16: Setting The Nominal Heat Input
Setting the nominal knob should be removed by pulling it heat input straight forward, making the “pr adj” visible. Turning clockwise reduces the pressure; turning anti clockwise The gas control has been factory increases the pressure. It is preset to the water heater nominal heat recommended to check the heat input. - Page 17 Unit SCT 75-75 SCT 100-95 Inletpressure mbar Burner pressure mbar 12.5 Diameter main injector 3.90 2.30 2.30 4.50 2.35 2.35 Diameter pilot injector 2x0.27 2x0.16 2x0.16 2x0.27 2x0.16 2x0.16 Procedure: 4a. Conversion from natural gas to LP- 1. Close the main gas tap in the gas sup- gas: ply;...
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Page 18: Maintenance
4b Conversion from LP-gas to natural 5. Check for water leaks. gas: - Put the pressure regulator into If it is necessary to replace the anode it operation. To do this the should always be replaced by one of temperature regulating knob should the same type. -
Page 19: Cleaning
2.8.2 Cleaning 2.8.3 Decalcification 1. Close the gas supply and demount Formation of lime scale depends on the the burner after it has cooled down. quality and quantity of the water used. 2. Disconnect the burner, pilot pipe and In addition higher water temperatures thermo couple from the gas control lead to more deposit in the appliance. -
Page 20: Inlet Combination
Inlet combination 7. Check the thermostat sensor for scale build up. Not applicable in U.K. and Ireland. Hot water temperature too high Check whether the control 2.10 Fault finding thermostat is set too high. Possible water leakage In case of failure the following should 1. -
Page 21: For The User
3. FOR THE USER supply pressure (with a maximum of 8 bar). The amount of cold water that is Commissioning added is equal to the amount of hot water used. The gas control block automatically regulates the gas supply. Warning The main burner will ignite as soon as a Installing and commissioning of this reduction in water temperature is... -
Page 22: Fault Finding
Fault finding Failure Cause Measure Gas smell If you smell gas you should immediately close the main gas tap you should not light any fire or switch on light, electrical switches or bells. Open windows and immediately contact your installer or the local gas company. Clean the pilot burner Pilot Blocked pilot burner... -
Page 23: Warranty
4. WARRANTY e) with an approved temperature and pressure relief valve of adequate capacity not exceeding the working The following conditions form the pressure rating shown on the water guarantee agreement between STATE heater, and installed in conformity WATER HEATERS (the warrantor) and with STATE WATER HEATERS the owner of the water heater. - Page 24 The terms of this guarantee do not effect your statutory rights under United Kingdom Consumer Legislation. This guarantee applies to the model SCT 75-75 G and SCT 100-95 G...
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