Related Manuals for A.O. Smith EQ 280 G
Summary of Contents for A.O. Smith EQ 280 G
- Page 1 MODELS EQ 280 G EQ 380 G INSTALLATION- AND USER INSTRUCTION UNITED KINGDOM / IRELAND WATERSTORAGE HEATERS...
- 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 - Technical description ... 8 1.3.1 - Dimensions ... 8 1.3.2 - Technical data ... 10 For the installer ..12 - Installation instructions ... -
Page 4: General
1. 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 1) Draught diverter 2) Hot water outlet 3) Insulation material 4) Flue tube 5) Glass lined tank 6) Gas control valve 7) Cold water inlet pipe Drawing 1 - Cross-section of the appliance T&P safety connection Steel jacket 10) Flue baffle 11) Sacrificial anode 12) Drain tap 13) Atmospheric burner...
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Page 6: Technical Safety Equipment
1.2 Technical safety equipment Gas control block 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 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). Dim. (zie fig.3) All dimensions are given in mm. (rounded off on 5 mm). EQ 280 EQ 380 1585 1450 1505 1505... - Page 9 Drawing 3 - Dimensions...
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Page 10: Technical Data
1.3.2 Technical data Device category: II2H3+ DESCRIPTION DATA NATURAL GAS G20 - 20 mbar: Nominal heat input (lower value) Nominal power Inlet-pressure (G20) Burner pressure (G20) Gas consumption (G20) * Diameter main orifice (G20) Diameter pilot orifice (G20) Warming-up time T= 45 K DATA BUTANE G30 - 30 mbar: Nominal heat input (lower value) Nominal power... - Page 11 DESCRIPTION GENERAL Storage capacity Water connections ** Gas connection Drain tap Anode T&P-plug Maximum working pressure Empty weight Gas consumption at 1013,25 mbar and 15°C For a leak-proof sealed connection European coupling pieces can be used on the NPT-connection nipples with a pipe thread of ISO 228/1 unit EQ 280...
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Page 12: 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... -
Page 13: Gas Connection
Installation should be carried out generally as shown on the following diagram. See drawing 4. A.O. Smith water heaters are tested to a maximum pressure of 12 bar and a maximum working pressure of 8 bar. Drawing 4 - Connection diagram... -
Page 14: Flue System
All connections and joints should be tested for gas soundness with a suitable leak detector (do not use a naked flame). 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. -
Page 15: Commissioning
Commissioning 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 16: Pilot Adjustment
Pilot adjustment The pilot can be adjusted by means of the regulating screw under the plastic cover on the right hand side of the gas control block. Turn the screw clockwise to reduce the gas pressure and anti clockwise to increase the pressure. Care should be taken to ensure the pilot covers the thermocouple element correctly. -
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 Unit Inletpressure mbar Burner pressure mbar 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 table above).
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Page 19: Maintenance
Maintenance To ensure safe and efficient operation of the water heater it is recommended that it is cleaned and serviced at least once a year by a qualified competent person. 2.8.1 Sacrificial anode The life cycle of the anode is determined by the quality and the quantity of the water flowing through the apparatus. -
Page 20: Decalcification
2.8.3 Decalcification Formation of lime scale depends on the quality and quantity of the water used. In addition higher water temperatures lead to more deposit in the appliance. A temperature setting of 60°C is recommended in order to keep the calcification at a low level. Decalcification should be attempted with the proper means. -
Page 21: Gas Smell
Flue down draught safety device If the flue tube safety device has switched off the appliance, the appliance can be put back into operation through the normal procedure. If the flue tube safety device repeatedly puts the appliance out of operation then this points to problems with the flue. -
Page 22: For The User
FOR THE USER Commissioning Warning Installing and commissioning of this water heater should only be carried out by a qualified competent heating engineer. 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: Fault Finding
Fault finding Failure Cause Gas smell Pilot extinguishes Blocked pilot burner Blocked chimney Safety thermostat Thermocouple defective Thermocouple makes no contact Gas supply closed Insufficient or no Temperature is set too low hot water Control knob in position ( ) (pilot burns ) Control knob in position ( Flue safety device closed the gas... -
Page 24: 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 25 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 27 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: ...
- Page 28 0308 645 R0...
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