A.O. Smith BTI - 85 Installation And User Instructions Manual Download Page 28 | Manualshive

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0308 253 R0

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Summary of Contents for BTI - 85

Page 1: ...MODELS BTI 85 G BTI 100 G HOTWATERSTORAGEHEATERS UNITED KINGDOM IRELAND INSTALLATION AND USER INSTRUCTION ...

Page 2: ... and or bodily harm Installation and commisioning 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 The appliance may only be installed in a room if this room meets the ventilation requirements A O SMITHACCEPTSNORESPONSIBILITYFORWARRANTY SERVICEAND OR PRODUCTLIABILITYINCASE...

Page 3: ... 15 2 1 6 Electrical connection 15 2 2 Commissioning 16 2 2 1 Filling the water heater 16 2 2 2 Putting in to operation 16 2 2 3 Shut down 16 2 3 Removing and replacing the control panel front cover 17 2 4 Setting the gas pressure 17 2 5 Removing and replacing the inner door 18 2 6 Temperature regulation 18 2 7 Converting to another type of gas 19 2 8 Maintenance 19 2 8 1 Magenesium anode 19 2 8 2...

Page 4: ... layer covered in a steel jacket reduces unnecessary heat loss When the appliance is filled with water it continuously is under water pressure As hot water is drained from the tank cold water is added immediately Four flue baffles have been placed in the flue tube to improve heat tranfer The flue gasses pass their heat on to the water by means of radiation and convection The exhaust of the flue ga...

Page 5: ...ntrol panel 8 Inspection cover plate 9 Intermittent pilot burner and flame probe Figur 1 Cross section of the heater 10 Cold water inlet 11 Combustion products discharge safety device 12 T P valve connection 13 Outer casting 14 Flue baffle 15 Magnesium anode 16 Drain valve and secondary return connection 17 Main burner ...

Page 6: ...rface ensures that the burner ignites as soon as there is a demand for heat 1 2 2 Controlpanel Temperature control for the water heater is housed in the control panel See figur 2 For safety purposes heaters are always fitted with two thermostats a control thermostat is adjustable between 40 C and 80 C and a safety thermostat 90 C The control panel is fitted with an ON OFF switch I 0 At setting I t...

Page 7: ...e RESET button on the control panel The unit has to be manually reset by pushing the reset button If the flame is lost during normal run the automatic ignition controller repeats the start sequence 1 2 4 Combustionproducts discharge safety device The heater has been fitted with a combustion products discharge safety device It is the function of the safety device to prevent flue gases from the wate...

Page 8: ...10 1 Cold water inlet 2 Hot water outlet 3 Gas control 4 Drain valve 5 T P relief valve tapping 6 Clean out Dimensions BTI 85 BTI 100 1 3 Technical information 1 3 1 Dimensions These water heaters are only suitable for a flue tube with minimal the announced diameter dimension G All dimensions are given in mm rounded off on 5mm See figur 3 ...

Page 9: ...9 Figur 3 Dimensions AOS 1092 ...

Page 10: ...OPANE G31 37 mbar Nominal heat input upper valvue kW 22 9 24 9 Output kW 17 9 19 5 Inlet pressure mbar 37 37 Gas consumption kg h 1 6 1 8 Diameter main orifice mm 2 30 2 35 Diameter pilot orifice mm 0 23 0 23 GENERAL Storage capacity litres 278 372 Water connections 1 11 5 NPT 11 4 11 5NPT Gas connection Rp1 2 Rp1 2 Drain valve 3 4 14NPT 3 4 14NPT Anode 3 4 14NPT 3 4 14NPT T P plug 3 4 14NPT 3 4 1...

Page 11: ...bout 1 2 to 1 3 micro Amperes DC when only the pilot flame is burning Adjust the main burner pressure to zero to be able to measure under this condition With pilot and main burner in operation the ionisation current will be about 6 0 and 6 3 micro Amperes DC Ionisation current can be measured by connecting a universal meter in series in the connection to the ionisation electrode Make sure to measu...

Page 12: ...nt Installation should be carried out in accordance with all local authority and Building Regualions Model Water Bylaws bylaws of the local water supplier Building Standards Scotland Consolidation Regulations and any re levant requirements of the Local Authority local gas regions and the following British Standards current editions Fordomesticapplications BS 5440 part 1 and part 2 BS 5546 Installa...

Page 13: ... the system complies with the requirements of the water by laws and appropriate building regulations When fitting it is essential the rules of good practice are applied at all stages of installation Vented systems See figur 4 If the water heater is to be connected to a cold feed tank or cistern the hot water supply pipe must include an open vent which discharges over the cold feed cistern The cold...

Page 14: ...lding regulations should be used Installation should be carried out generally as shown on the following diagram 1 Manual gas valve 2 Stop valve 3 Expansion vessel 4 T P safety valve 5 Non return valve 6 Circulation pump 7 Drain valve 8 Pressure reducing valve 9 Expansion valve Figur 5 Connection diagram unvented systems A Gas supply B Hot water outlet C Cold water inlet D Hot water taps E Return c...

Page 15: ...c If an existing chimney or flue is to be used this should be swept clean and be free of debris before an approved liner is installed and connected to the water heater 2 1 5 Draught diverter The appliance has been fitted with a flue down draught safety device The operation of the safeguard is based on the principle of the Thermal Reflux Safeguard TRS This TRS can be recognized by the copper colour...

Page 16: ...l After manual reset an extended prepurge waiting time will occur 6 Switch the ON OFF switch into ON position If the pilot fails to ignite within 25 seconds the controls will go to lock out and the reset button will need to be reset wait 15 seconds before attempting reset It may be necessary to repeat the lighting sequence a number of times on the initial light up if all the air has not been purge...

Page 17: ...e and the top screw holes align 4 Replace the screw in the top centre of the cover 2 4 Setting the gas pressure The gas pressure has been set to the correct values at the factory Important The following proce dure must be followed when checking or setting the gas pressure 1 Shut down the heater by switching off the mains current switch off main switch 2 Connect a manometer to the pressure test nip...

Page 18: ... maximum 8 bar The amount of cold water that is added is equal to the amount of hot water used The gas control block automatically regulates the gas supply The main burner will ignite as soon as a reduction in water temperature is sended by the thermostat The main burner will shut down as soon as the preset temperature is achieved At high water temperatures there is more scale buildup in the appli...

Page 19: ...1 5 30 37 10 0 30 37 Diameter main injector mm 3 90 2 30 2 30 4 50 2 35 2 35 Diameter pilot injector mm 0 56 0 23 0 23 0 56 0 23 0 23 0 41 0 41 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 Magenesium anode The life cycle of the anode is determined by the qualit...

Page 20: ... 8 4 Spare parts To be able to order spare parts it is im portant to note the type of appliance as well as the serial number of the appliance Based on this information the data concerning the spare parts can be determined 2 9 Inlet combination Not applicable in U K and Ireland 2 10 Gas smell Immediately shut the main gas tap Do not light any fire or switch o any lights do not use any electrical sw...

Page 21: ...epurge waiting time will occur 6 Switch the ON OFF switch into ON position If the pilot fails to ignite within 25 seconds the controls will go to lock out and the reset button will need to be reset wait 15 seconds before attempting reset It may be necessary to repeat the lighting sequence a number of times on the initial light up if all the air has not been purged from the gas supply 7 The main bu...

Page 22: ...her valvue hot water 60 C recommended or none at all Thermal Reflux Safeguard After resetting the TRS activate the heater has shut down the heater If this occurs regularly call your installer Overheat thermostat is Allow the water to cool down opentaps engaged Puth the RESET button at the panel Supply of hot water exhausted Reduce hot water use Give the heater time to heat the water Unindentifiabl...

Page 23: ...xceeding the maximum setting of its thermostat and ECO Energy Cut Off device c At water pressures and or energy inputs which do not exceed those stated on the rating plate of the wa ter heater 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 conf...

Page 24: ...ect 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 The terms of this guarantee do not ef fect your statutory rights ...

Page 25: ...tton B ON OFF switch N Terminalblock C Pilot burner P Terminalblock D Spark electrode R Earth terminals E Flame probe S Connector F Transformer flame detection T Gas control valve G TRS U Terminalblock H Control thermostat V Tank earth K Safety thermostat W Casting earth L Timer X Control panel base plate earth 1 2 3 4 5 6 ...

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