Related Manuals for A.O. Smith EQ 115 G
Summary of Contents for A.O. Smith EQ 115 G
- Page 1 MODELS INSTALLATION- AND USER HOT WATER STORAGE HEATERS UNITED KINGDOM / IRELAND INSTRUCTIONS 115 G 155 G EQH 200 G...
- Page 2 The appliance may only be installed in a room if this room meets the ventilation requirements. A.O. SMITH ACCEPTS NO RESPONSIBILITY FOR WARRANTY, SERVICE AND/OR PRODUCT LIABILITY IN CASE OF UNAUTHORIZED ALTERATIONS, PRODUCT MODIFICATIONS OR REPAIR.
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Page 3: Table Of Contents
CONTENTS General ..4 Description of the appliance ... 4 Technical safety equipment ... 6 1.2.1 Gas control valve ... 6 1.2.2 Flue down draught safety device ... 6 Technical description ... 8 1.3.1 Dimensions ... 8 Technical data ... 10 For the installer . -
Page 4: General
GENERAL Description of the 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- marking. - Page 5 Figure 1 - Cross-section of the heater Draught diverter Hot water outlet Insulation Flue tube Glass lined tank Gas control valve Cold-water inlet T&P valve connection AOS 0478 Outer casting 10) Flue baffle 11) Sacrificial anode 12) Drain valve 13) Atmospheric burner 14) Pilot light burner with thermocouple...
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Page 6: Technical Safety Equipment
Technical safety equipment 1.2.1 Gas control valve The water heater has been fitted with a gas control block consisting of a thermo-electrical pilot flame safeguard, pilot flame pressure regulator, burner pressure regulator, a control thermostat (adjustable between 30°C and 71°C) and a safety thermostat (82°C). - Page 7 Figure 2 - Gas control block with T.R.S. T.R.S. thermostat Sensor combustion products dicharge safety device Thermocouple with built-in interrupter Thermocouple Gas control block Reset button Pilot burner Temperature regulator knob AOS 0479...
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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). Dimensions EQ 115 1280 1120 1180 1180 All dimensions are given in mm (rounded off on 5 mm). EQ 155 1370 1210 1270... - Page 9 AOS 0481 Figure 3 - Dimensions...
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Page 10: Technical Data
Technical data Device category: II2H3+ DESCRIPTION DATA NATURAL GAS G20 - 20 mbar: Nominal load (gross) Nominal capacity Suppy pressure Burner pressure Gas consumption * Diameter main orifice Diameter pilot orifice Heating time T= 44 K DATA BUTANE G30 - 28/30 mbar: Nominal load (gross) Supply pressure Burner pressure... -
Page 11: For The Installer
50 gallons or 227 litres. Unvented To install an A.O. Smith water heater on an unvented cold water supply system a kit of valves and fittings listed by the water research centre and complying with part G3 of the current building regulations should be used. - Page 12 See Figure 4. A.O. Smith water heaters are tested to a maximum pressure of 12 bar and a maximum working pressure of 8 bar. Figure 4 - Connection diagram (unvented system) Manual gas valve Stop valve Expansion vessel T&P safety valve...
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Page 13: Gas Connection
2.1.3 Gas connection The gas supply to this appliance must be installed in accordance with BS 6891 (1988). Fit the 1/2" gas supply cock supplied with this unit immediately before the gas control block. No heat or soldered joints should be applied in the vicinity of the gas control block, as they could cause damage to the control. -
Page 14: Commissioning
Commissioning 2.2.1 Filling the water heater 1. Close the drain tap. 2. Open the cold water tap to the water heater and open all taps where hot water can be drained for de- aeration. The water heater is filled as soon as cold water flows from all taps. -
Page 15: Removing And Replacing The Inner Door
2.2.3 Removing and replacing the inner door (only for the EQ 115/155 models, see Figure 7a). Procedure: 1. Place lip A through the recess on the right and subsequently slide it down behind the steel wall. See to it that both lower lips remain in front of the metal wall. -
Page 16: Temperature Regulation
recommended to also close the cold water tap and to drain the appliance after cooling (open the drain tap; it is possible to connect a drain hose to the drain tap; open the nearest hot water drain point to prevent air locks). -
Page 17: Setting The Nominal Heat Input
Setting the nominal heat input The gas control has been factory preset to the water heater nominal heat input. A further check of the burner pressure should be carried out during the commissioning of the unit after installation. The following procedure should be followed. - Page 18 Description Inlet pressure Burner pressure Diameter main injector Diameter pilot injector Description Inlet pressure Burner pressure Diameter main injector Diameter pilot injector Procedure: 1. Close the main gas tap in the gas supply. 2. Demount the burner (see “Cleaning”). 3. Replace the injector of the main burner and the pilot burner with the correct injectors from the conversion set (see tables above).
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Page 19: Maintenance
Figure 10 - Conversion to another gas 4.b Conversion from LP-gas to natural gas: - Put the pressure regulator into operation. To do this the temperature regulating knob should be pulled straight forward. Next the red plastic cover that is now visible, should be removed. -
Page 20: Cleaning
2.8.2 Cleaning 1. Close the gas supply and demount the burner after it has cooled down, 2. Disconnect the burner, pilot pipe and thermo couple from the gas control block (see Figure 11), 3. Remove the complete burner assembly, 4. Clean the burner with a soft brush. 5. -
Page 21: Fault Finding
2.10 Fault finding In case of failure the following should be checked. 2.10.1 Safety thermostat All appliances have been fitted with a safety thermostat that shuts off the gas supply when the water temperature is too high. The safety thermostat remains activated until the water temperature drops below the safety temperature. -
Page 22: For The User
FOR THE USER Commissioning Warning Installing and commissioning (for the first time) of this water heater should only be carried out by a qualified competent heating engineer. 3.1.1 Filling the water heater 1. Close the drain tap. 2. Open the cold water tap to the water heater and open all taps where hot water can be drained for de- aeration. -
Page 23: Maintenance
and tilted slightly in the direction of the drain tap. 3.1.5 Maintenance The inlet combination has to be tested regularly by relieving it (via the relief button). The water has to flow out in a forceful jet. Check whether the discharge pipe is open. -
Page 24: Fault Finding
Fault finding Fault Possible cause Gas smell Pilot Blocked pilot burner extinguishes Blocked chimney Safety thermostat Thermocouple defective Thermocouple makes no contact Gas supply closed Down draught supervision not connected. Insufficient Temperature is set too l o w hot water, or none at all Control knob in position ( ) (pilot burns ) - Page 25 Fault Possible cause Insufficient Safety thermostat has hot water, or closed the gas supply none at all because the water temperature was too high Hot water storage empty Cause cannot be determined Condensation of (flue) Water gasses leakage Insufficient sealing of the water connections (thread) Leakage from other...
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Page 26: Guarantee
A.O. Smith Water Products Companies installation instructions; f ) when anode(s) have been inspected and renewed, if they are worn or erroded by 50% of more at any point of their length. - Page 27 A.O. Smith Water Products Company. With respect to the water heater in question further A.O. Smith does not guarantee this water heater as suitable for purpose except within the terms of warranty detailed above.
- Page 28 Important This form should be filled in completely within two weeks of installation. MODEL: ... SERIAL NUMBER: ... ORIGINAL DATE OF INSTALLATION: ... NAME OWNER: ... ADDRESS: ... TOWN: ... (STAMP) INSTALLER: ...
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