EQ 280 EQ 380 United Kingdom & Ireland HOT WATER STORAGE HEATERS 0311888 4115 - Reserved Changes.
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.
CONTENTS PAGE 1. 1.1 1.2 1.3 1.4 1.5 1.5.1 1.5.2 General....................................................................................................................... 4 Description of the appliance.....................................................................................4 Packaging material...................................................................................................4 Disposal.........................................................................................
1. GENERAL 1.1 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 CEmarking. It is an open flued appliance without ventilator and with a flue gas down draught safeguard (category B11BS). The water heater is suitable for a maximum working pressure of 8 bar.
1.4 Technical safety equipment 1.
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. is activated by heating of the sensor by the hot gasses. After the cause of the reentry of flue gasses has been traced the device can be put back into operation again. In case of T.R.S.
1.5 Technical description 1.5.1 Dimensions These water heaters are only suitable for a flue tube with minimal the announced diameter (dimension G). Dimensions (see figure 3) EQ 280 EQ 380 A 1585 1780 B 1450 1640 D 645 675 E 735 765 G 130 130 K 375 375 M 1505 1685 N 1505 1685 R 285 285 S 1280 1460 1 Cold water inlet 2 Warm water outlet 3 Gas control block 4 Drain tap 5 T&P relief valve tapping All dimensions are given in mm. (rounded off on 10 mm). See drawing 3.
Figure 3 - Dimensions 8 Drawing 3 - Dimensions 9
1.5.2 Technical data Device category II2H3+ DESCRIPTION unit EQ 280 EQ 380 Nominal heat input (gross) kW 25.1 26.7 Nominal output kW 19.2 20.4 Inlet-pressure (G20) mbar 20 20 Burner pressure (G20) mbar 12.5 8.7 DATA NATURAL GAS G20 - 20 mbar: Gas consumption (G20)* m3/h 2.4 2.5 Diameter main orifice (G20) mm 3.90 4.50 Diameter pilot orifice (G20) mm 2 x 0.27 2 x 0.27 Heating time ΔT= 45 K min.
DESCRIPTION unit EQ 280 EQ 380 Load Profile Load Profile - XXL XXL - C C Energie-efficiëntie % 55 51 Daily Electricity Consumption kWh 0.000 0.000 Daily Fuel Consumption kWh GCV 44.969 47.754 Mixed Water 40°C (V40) ltr. 635 926 Additional Load Profile - - 3XL Energy Efficiency % - 60 Daily Electricity Consumption kWh - 0.000 Daily Fuel Consumption kWh GCV - 78.348 Mixed Water 40°C (V40) ltr.
DESCRIPTION unit EQ 280 EQ 380 litres 265 355 Water connections ** - 1" - 11,5 NPT 1 /4" - 11,5 NPT Gas connection - ISO 7/1 Rp 1/2 ISO 7/1 Rp 1/2 Drain tap - 3 /4" - 14 NPT 3 /4" - 14 NPT T&P-plug - 3 /4" - 14 NPT 3 /4" - 14 NPT GENERAL Storage capacity 1 Maximum working pressure bar 8 8 Empty weight kg 117 144 * 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 t
2. FOR THE INSTALLER 6644, 6700, 6798 and 6891. 2.1 Some chemicals produce vapours which can cause rapid failure of thermocouples, burners and storage tanks if they are drawn into the combustion air supply.
Drawing 4 - Connection diagram (unvented system) 1) 2) 3) 4) 5) 6) 7) Gas cock Stop valve Expansion vessel T&P safety valve Non return valve Circulation pump Drain valve the current building regulations should be used. 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.
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. 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. per metre of run.
2.2 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 deaeration. The water heater is filled as soon as cold water flows from all taps. 3. Close all hot water taps. Putting into operation 1. Check whether the water-heater has been filled with water and whether the gas supply to the water heater is open. 2.
2.3 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. 2.4 Putting out of operation 1. For short periods of time the control knob should be turned to (✸); the pilot keeps burning. 2.
2.6 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. 1. Remove the protruding cover screw on the right side of the gas control block and connect a U-gauge manometer to the outlet. 2. Put the appliance into operation and ignite the burner. 3.
EQ 280 Unit G20 G30 G31 G20 G30 G31 Inletpressure mbar 20 30 37 20 30 37 Burner pressure mbar 12.5 30 37 8.7 30 37 Diameter main injector mm 3.90 2.30 2.30 4.50 2.35 2.35 mm 2x 0.27 2x 0.16 2x 0.16 2x 0.27 2x 0.16 2x 0.16 Diameter pilot injector Procedure: 1. Close the main gas tap in the gas supply. 2. Demount the burner (see “Cleaning”). 3.
Drawing 10 - Conversion to another gas 2.8 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. It is therefore recommended that the anode be inspected and replaced if necessary at least once a year. 1.
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. For extensive information a decalcification instruction is available. 2.8.
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. The only remedy is to determine the cause of the problem (for instance a blocked chimney) and to solve the problem. Hot water temperature too low 1. Check the setting of the temperature control knob; 2.
3. 3.1 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 deaeration. The water heater is filled as soon as cold water flows from all taps. 3. Close all hot water drain taps. Putting into operation 1.
3.4 Fault finding Failure Cause Gas smell Pilot extinguishes Insufficient or no hot water Water leakage Measure 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. Blocked pilot burner Clean the pilot burner Blocked chimney Find the cause and remove it. Safety thermostat Set the temperature regulator at a lower temperature.
4. GUARANTEE The following conditions form the guarantee agreement between A.O. Smith Water Products Company (the warrantor) and the owner of the water heater. 4.1 Guarantee in general d) in a non corrosive atmosphere or area; e) with an approved temperature and pressure relief valve of adequate capacity not exceeding the working pressure rating shown on the water heater, and installed in conformity with A.O.
4.7 No other guarantee or warranty either expressed or implied is made on behalf of 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. A.O. Smith Water Products Company will not be liable by virtue of this guarantee or otherwise for damage to any persons or property when arising out of contracts or tort.
Important This form should be filled in completely within two weeks of installation. MODEL: ......................................................................................................................... SERIAL NUMBER: ......................................................................................................... ORIGINAL DATE OF INSTALLATION: ............................................................................ NAME OWNER: .....................................................
0311888 R0 27
Uw Installateur Your Installer Ihr Installateur Votre Installateur Su Instalador Instalador Ditta Installatrice Twój Instalator Eγκαταστάτη Σας Nederland A.O. Smith Water Products Company B.V. Postbus 70 5500 AB VELDHOVEN United Kingdom A.O. Smith Water Heaters Unit B8 Armstrong Mall, Southwood Business Park, Farnborough, Hampshire, GU14 0NR 0800 - AOSMITH (2676484) info@aosmith.nl www.aosmith.nl 0870 - AOSMITH (267 6484) info@aosmith.nl www.aosmith.co.uk France A.O.
