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1129

1.2 Technical safety

equipment

1.2.1 Gas control valve

The water heater is equipped with a gas

control wich regulates the flow of gas to

the burner. The gas block is equipped

with a safety valve, gas valve and burner

control (on a standard natural gas

setting). To ensure improved ignition the

gas control valve opening mechanism is

fitted with a delay (softlite).

The gas control block is suitable for

gasses from the first, second and third

gas family. The maximum inlet pressure

is 60 mbar.

The automatic incandescent ignition (hot

surface) ensures that the burner ignites

as soon as there is a demand for heat.

1.2.2 control panel

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”, the gas control is activated on the

basis of heat demand from the control

thermostat. At setting ”0” the heater is

switched off.

A) Hot water outlet

B) Cold water inlet

1) Electrical connection

2) ON/OFF switch

3) Ignition controller reset button

4) Control thermostat knob

5) Safety thermostat reset button

Figur 2 - Top view of the heater

Содержание BTI - 65

Страница 1: ...MODEL BTI 65 G HOT WAteR storage heater united kingdom ireland INSTALLATIon and user instruction ...

Страница 2: ... 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 SMITH ACCEPTS NO RESPONSIBILITY FOR WARRANTY SERVICE AND OR PRODUCT LIABILITY IN CA...

Страница 3: ... draught safety device 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 Temperature regulation 18 2 6 Converting to another type of gas 18 2 7 Maintenance 19 2 7 1 Magenesium anode 19 2 7 2 Cleaning 19 2 7 3 Deca...

Страница 4: ...on 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 A flue baffle has 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 gasse...

Страница 5: ...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 11 14 15 16 17 1 2 3 4 5 6 9 7 13 10 12 8 AOS 1120 ...

Страница 6: ... surface ensures that the burner ignites as soon as there is a demand for heat 1 2 2 Control panel 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...

Страница 7: ...ESET 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 Combustion products 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 water ...

Страница 8: ...e with minimal the announced diameter dimension G All dimensions are given in mm rounded off on 5mm See figur 3 Dimensions BTI65 A 1680 B 1510 D 520 E 655 G 100 K 340 M 1540 N 1540 R 295 S 1350 1 Cold water inlet 2 Hot water outlet 3 Gas control 4 Drain valve 5 T P relief valve tapping 6 Clean out ...

Страница 9: ...9 Figur 3 Dimensions ...

Страница 10: ...40 Diameter pilot orifice mm 0 56 0 41 Heating time T 45K min 45 DATA BUTANE G30 28 30 mbar Nominal load gross kW 17 2 Nominal capacity kW 12 3 Supply pressure mbar 30 Gas consumption kg h 1 3 Diameter main orifice mm 1 90 Diameter pilot orifice mm 0 23 DATA PROPANE G31 37 mbar Nominal heat input gross kW 16 4 Output kW 11 7 Inlet pressure mbar 37 Gas consumption kg h 1 2 Diameter main orifice mm ...

Страница 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...

Страница 12: ...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 relevant requirements of the Local Authority local gas regions and the following British Standards current editions For domestic applications BS 5440 part 1 and part 2 BS 5546 Installati...

Страница 13: ...e 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 fe...

Страница 14: ...uilding 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...

Страница 15: ...tc 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 colou...

Страница 16: ...ol 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 purg...

Страница 17: ...ge 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 procedure 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...

Страница 18: ... scale will be reduced 2 6 Converting to another type of gas For conversion of the appliance from natural gas to another type of gas or visa versa it is necessary to exchange the pilot injector and the main injector The conversion may only be executed by a qualfied competent person Procedure 1 Shut the heater down Close the main inlet gas valve and switch off the electricity supply at the main swi...

Страница 19: ... it has cooled down 2 Disconnect the burner assembly from the gas control 3 Remove the complete burrner assembly 4 Clean the burner with a soft brush 5 Check the pilot burner and clean it if so required 6 Check the combustion chamber flue tube and flue baffle and clean these if required After cleaning of the pilot and main burner the operation of these should be checked If necessary the burner pre...

Страница 20: ... 10 Condensation If the appliance is filled with cold water or if the hot water consumption is very high condensation of flue gasses will occur on the cold surfaces of the combustion chamber and the flue tube The water drops will fall on the burner and cause a sizzling noise This is a normal phenomenon that will disappear as soon as the appliance reaches its normal operating temperature Important ...

Страница 21: ...repurge 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 b...

Страница 22: ...rature to higher valvue 60 C recommended Thermal Reflux Safeguard has shut down the heater After resetting the TRS activate the heater If this occurs regularly call your installer Overheat thermostat is engaged Cool down the water in the equipment and adjust the water temperature to a lower setting 60 C Reset the safety thermostat using the RESET button Supply of hot water exhausted Reduce hot wat...

Страница 23: ... exceeding 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 water 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 con...

Страница 24: ...th 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 The terms of this guarantee do not effect your statutory r...

Страница 25: ...ton B ON OFF switch N Terminal block C Pilot burner P Terminal block D Spark electrode R Earth terminals E Flame probe S Connector F Transformer flame detection T Gas control valve G TRS U Terminal block 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 ...

Страница 26: ...0305 394 R4 ...

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