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EQB 115 G
MODELS
EQB 155 G
EQB 200 G
INSTALLATION- AND USER
INSTRUCTIONS
HOT WATER STORAGE HEATERS
HIGH TEMPERATURE
UNITED KINGDOM / IRELAND
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Warning: because of the high temperature setting this appliance is not suited for domestic use. 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 t
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CONTENTS PAGE 1. General. ............................................................................................................ 4 1.1 Description of the appliance ............................................................................... 4 1.2 Technical safety equipment ................................................................................ 6 1.2.1 Gas control valve ................................................................................................ 6 1.2.2 Flue
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1. GENERAL exceeding 25 mm. inside diameter; maximum length of dead leg 7.5 1.1 Description of the metres; appliance - for pipes with an inside diameter exceeding 25 mm. maximum dead leg Construction of the water heater is in 3.0 metres. 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. It is an open flued appliance with
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AOS 0478 Figure 1 - Cross-section of the heater 1) Draught diverter 2) Hot water outlet 9) Outer casting 3) Insulation 10) Flue baffle 4) Flue tube 11) Sacrificial anode 5) Glass lined tank 12) Drain valve 13) Atmospheric burner 6) Gas control valve 7) Cold-water inlet 14) Pilot light burner with thermocouple 8) T&P valve connection 5
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1.2 Technical safety of T.R.S. the RESET button has to be equipment pressed first. If this failure occurs frequently, this 1.2.1 Gas control valve indicates that the flue suffers from The water heater has been fitted with a down draught conditions. We advice gas control block consisting of a that necessary remedial actions be thermo-electrical pilot flame safeguard, carried out by a competent person. pilot flame pressure regulator, burner pressure regulator, a control thermostat Important (adjus
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AOS 0479 Figure 2 - Gas control block with T.R.S. 1) T.R.S. thermostat 4) Thermocouple 2) Sensor combustion products 5) Gas control block dicharge safety device 6) Reset button 3) Thermocouple with built-in 7) Pilot burner interrupter 8) Temperature regulator knob 7
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1.3 Technical description 1.3.1 Dimensions These water heaters are only suitable for a flue tube with minimal the announced diameter (dimension G). Dimensions EQB 115 EQB 155 EQB 200 A 1280 1370 1670 B 1120 1210 1540 D 465 515 515 F 545 595 605 G 80 80 100 K 325 325 380 L 270 295 395 M 1180 1270 1590 N 1180 1270 1590 R 230 230 255 S 945 1030 1380 V 205 205 205 1 Cold water inlet 2 Hot water outlet 3 Gas control valve 4 Drain valve 5 T&P valve tapping All dimensions are given in mm (rounded off
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AOS 0481 Figure 3 - Dimensions 9
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1.4 Technical data Device category: II2H3+ DESCRIPTION unit EQB 115 EQ B155 EQB 200 DATA NATURAL GAS G20 - 20 mbar: Nominal load (gross) k W 9.3 11.3 18.3 Nominal capacity k W 7.4 9.0 14.0 Suppy pressure mbar 20 20 20 Burner pressure mbar 12.5 12.5 10.5 3 Gas consumption * m /h 0.9 1.1 1.7 Diameter main orifice mm 2.35 2.60 3.50 Diameter pilot orifice mm 2 x 0.27 2 x 0.27 2 x 0.27 Heating time ΔT= 44 K min. 45 49 40 DATA BUTANE G30 - 28/30 mbar: Nominal load (gross) k W 10.1 12.2 17.6 Supply pr
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Some chemicals produce vapours 2. FOR THE INSTALLER which can cause rapid failure of thermocouples, burners and storage 2.1 Installation instructions tanks if they are drawn into the combustion air supply. This water heater must be fitted in a location which will permit the provision Therefore if this water heater will be of an approved flue system and used to supply hot water to: adequate ventilation. - hairdressers, - dry cleaners A service clearance of 15 cm at the - industrial degreasing pro
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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. AOS 0581 Figure 4 - Connection diagram (unvented system) 1) Manual gas valve 8) Pressure limiting valve 2) Stop valve 9) Expansion valve 3) Expansion vessel A) Gas supply 4) T&P safety valve B) Hot water delivery 5) Non return valve C) Cold water inlet 6) Circulation pump D) Hot water taps 7) Drain valve E) Return circulation 12
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2.1.3 Gas connection supervision must remain installed on the draught hood. The gas supply to this appliance must be installed in accordance with BS 6891 Connect the slide connectors of the (1988). down draught supervision to the Fit the 1/2" gas supply cock supplied thermocouple (see Figure 5) and install with this unit immediately before the gas the head of the down draught control block. No heat or soldered joints supervision in the bracket; see Figure should be applied in the vicinity of the
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2.2 Commissioning 5. Keep the control button (✸) pushed- in for approximately 20 seconds. 2.2.1 Filling the water heater After releasing the button the pilot 1. Close the drain tap. should remain burning. If the pilot 2. Open the cold water tap to the water extinguishes you should wait 5 heater and open all taps where hot minutes before repeating the ignition water can be drained for de- procedure. The size of the pilot flame aeration. The water heater is filled can be adjusted (see also “Pilot
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2.2.3 Removing and replacing the inner door (only for the EQB 115 and EQB 155 models, see Figure 7a). Procedure: 1. Place lip A through the recess on the A right and subsequently slide it down behind the steel wall. See to it that both lower lips remain in front of the metal wall. 2. Press lip B through the recess on the left. B 3. Subsequently slide lip B behind the steel wall (see Figure 7a). AOS 0520 (only for the EQB 200 model, see Figure 7b). Figure 7a - Mounting the inside door Procedure:
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recommended to also close the cold thermostat. The main burner will shut water tap and to drain the appliance down as soon as the preset after cooling (open the drain tap; it is temperature is achieved. possible to connect a drain hose to Position 1 = approximately 40°C the drain tap; open the nearest hot Position 2 = approximately 50°C water drain point to prevent air Position 3 = approximately 60°C locks). Position 4 = approximately 70°C To be able to drain the appliance Position 5 = approxima
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knob should be removed by pulling it 2.6 Setting the nominal straight forward, making the “pr adj” heat input 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. input by means of the gas meter. A further check of the burner pressure 4. Turn off the appliance and remove should be carried out during the the manometer hose and replace the c
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Description Unit EQB 115 EQB 155 G20 G30 G31 G20 G30 G31 Inlet pressure mbar 20 30 37 20 30 37 Burner pressure mbar 12.5 30 37 12.5 30 37 Diameter main injector mm 2.35 1.40 1.40 2.60 1.50 1.50 Diameter pilot injector mm 2x0.27 0.22 0.22 2x0.27 0.22 0.22 Description Unit EQB 200 G20 G30 G31 Inlet pressure mbar 20 30 37 Burner pressure mbar 10.5 30 37 Diameter main injector mm 3.50 1.95 1.95 Diameter pilot injector mm 2x0.27 0.22 0.22 Procedure: 4a. Conversion from natural gas to 1. Close the mai
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AOS 0487 Figure 10 - Conversion to another gas 4b. Conversion from LP-gas to natural 2.8.1 Sacrificial anode gas: The life cycle of the anode is determined - Put the pressure regulator into by the quality and the quantity of the operation. To do this the water flowing through the apparatus. It temperature regulating knob is therefore recommended that the should be pulled straight forward. anode be inspected and replaced if Next the red plastic cover that is necessary at least once a year. now vi
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2.8.2 Cleaning 2.8.3 Inspection of the internal 1. Close the gas supply and demount waterside surfaces the burner after it has cooled down, Formation of lime scale depends on the 2. Disconnect the burner, pilot pipe and quality and quantity of the water used. thermo couple from the gas control In addition higher water temperatures block (see Figure 11), lead to more deposit in the appliance. A 3. Remove the complete burner temperature setting of 60°C is assembly, recommended in order to keep the
