A.O. Smith EQH 200 G Installation and Use Manual
Contents
1. rn OR e RI a PEORES Installation eoe nn 11 Water connections eessessseeeeeeeeeenneen nennen nennen nennen nnne 11 Gas COnTIOClion cepere ete et ere ue eo e e e Re 13 Flue system m m Flue down draught safety device uuenneenssnsseensnnnnnnnnnnnnnnnnnnennnnnnnnennnnn nn GOMIMISSIONING iio Filling the water heater Putting into operation scccessceessenesesnereesteneeneseceesensneneneesessnoneneonanensesaneneneoee Removing and replacing the inner door RR de vee Pit Met dai Putting out of Operation citer a Temperature regulation Setting the nominal heat input sseeenenenene Conversion to another type of gas T ER hs MAINE ANCORA eee nena Ica Sacrificial SAMOS aye Iria i o S Inspection of the internal waterside surfaces 20 Spare parts ay E 20 Fault finding eee e pIRIDS ds 21 Safety thermostat u a nene e e dee a ec b des 21 Flue down draught safety device sesssssseeeene 21 Hot water temperature too low Hot water temperature too high Possible water leakage s es El A A c Condensation For the User2. Hot water taps Return circulation 2 1 3 Gasconnection The gas supply to this appliance must be installed in accordance with BS 6891 1988 Fit the 1 2 gas supply cock supplied with this unit immediately before the gas control block No heat or soldered joints should be applied in the vicinity of the gas control block as they could cause damage to the control 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 A split clip or flange should be provided in the flue close to the draught diverter for ease of servicing All flue materials should be corrosion resistant e stainless steel or galvanised and must include a tested and approved terminal to BS 5440 part 1 If the flue passes through any combustible material measures must be taken to protect against the possibility of fire All flues must terminate in free air space approx 1 5 metres from any vertical surface of structure i e chimney stacks roof parapets etc If an existing chimney or flue is to be used this should be swept clean and be free of debris before
3. an approved liner is installed and connected to the water heater 2 1 5 Flue down draught safety device The draught diverter has already been provided with a temperature probe ex factory for signalling returning flue gases The probe of the down draught supervision must remain installed on the draught hood Connect the slide connectors of the down draught supervision to the thermocouple see Figure 5 and install the head of the down draught supervision in the bracket see Figure 5 The draught hood must be positioned in its normal place with the temperature probe at the front of the boiler Pass the wiring of the temperature probe through the cable duct Note The screws with which the down draught supervision has been mounted in the bracket are already in the bracket IMD 0422 Figure 5 Down draught supervision installation 13 2 2 Commissioning 2 2 1 Filling the water heater 1 2 3 Close the drain tap 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 Close all hot water taps 2 2 2 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 Turn the temperature control knob clockwise and place the control knob in the PILOT position Remove th
4. 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 warning The applicance should NEVER be taken into operation with a closed cold water supply Provision should always be made for expansion 21 3 FORTHE USER 3 1 Commissioning Warning Installing and commissioning for the first time of this water heater should only be carried out by a qualified competent heating engineer 3 1 1 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 3 Close all hot water drain taps 3 1 2 Putting into operation 1 Check whether the device has been filled with water and whether the gas supply to the water heater is open 2 Turn the temperature control knob clockwise and place the control knob in the PILOT position 3 Remove the outer and inner door of the combustion chamber 4 Keep the control button pushed in and press the piezo ignitor several times until the pilot burns see Figure 6 5 Keep the control bu
5. systems In each case appropriate valves and fittings should be used to ensure 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 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 feed cistern must have an actual capacity of greater volume than the hourly recovery rate of the water heater s which it supplies The minimum actual capacity is 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 centre and complying with part G3 of the current building regulations should be used Installation should be carried out generally as shown on the following diagram 11 See Figure 4 A O Smith water heaters are tested to a maximum pressure of 12 bar anda maximum working pressure of 8 bar 4 D D D gt 2 62 5 Figure 4 Connection diagram unvented system Manual gas valve Stop valve Expansion vessel T amp P safety valve Non return valve Circulation pump Drain valve OOS OUI 12 mooo 99 AOS 0581 Pressure limiting valve Expansion valve Gas supply Hot water delivery Cold water inlet
6. 1 Mounting burner set 20 2 8 3 Inspection of the internal waterside surfaces 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 4 Spare parts To be able to order spare parts it is important 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 29 Inlet combination Not applicable in U K and Ireland AOS 0488 2 10 Fault finding In case of failure the following should be checked 2 10 1 Safety thermostat All appliances have been fitted with a safety thermostat that shuts off the gas supply when the water temperature is too high The safety thermostat remains activated until the water temperature drops below the safety temperature The water heater must be reignited manually The regulation thermostat should be set to a lower water temperature If the pilot is extinguished repeatedly at higher temperatures than normal this indicates that the safety thermostat is operating 2 10 2 Flue down draught safety device If the flue tube safety device has switched off the appliance the a
7. EQ 115G MODELS EQ 155G EQH 200G INSTALLATION AND USER INSTRUCTIONS HOT WATER STORAGE HEATERS UNITED KINGDOM IRELAND 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 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 INCASE OF UNAUTHORIZED ALTERATIONS PRODUCT MODIFICATIONS ORREPAIR 2 CONTENTS PAGE 2 a ld Row Di po 2 1 2 1 1 2 1 2 2 1 3 2 1 4 2 1 5 2 2 2 2 1 2 2 2 2 2 3 2 3 2 4 2 5 2 6 2 7 2 8 2 8 1 2 8 2 2 8 3 2 8 4 2 9 2 10 2 10 1 2 10 2 2 10 3 2 10 4 2 10 5 2 11 2 12 3 3 1 3 1 1 3 1 2 3 1 3 3 1 4 3 1 5 3 2 4 Ge eral erna ia 4 Description of the appliance Technical safety equipment 5 Gas control Flue down draught safety device oh m Technical description ronca tert ten Dimensions Ar ar A SS
8. amage to any persons or property when arising out of contracts or tort The terms of this guarantee do not effect your statutory rights under United Kingdom Consumer Legislation 27 Important This form should be filled in completely within two weeks of installation MODE Eeee ae IPTE SERIALNUMBE Ruanda ORIGINAL DATE OF INSTALLATION aran NAMEOWNER aec alie dei ADDRESS A it TOWN ui sins AA t AS e ta e ere He d STAMP INSTALLER rr end acne dcl 28 29 30 31 32 0307 985 R1
9. ater side the warrantor will supply a complete new water heater of equivalent size and duty excluding delivery and installation charges On the replacement water heater a guarantee will be granted sufficient to cover the unexpired portion of the original 3 year guarantee of the originally installed water heater 4 3 Conditions for installation and use The guarantee applies to the heater only while it remains in its orignial location and is installed in accordance with local plumbing and building regulations and all relevant Codes of Practice The water heater should also have been used only a for potable water free to circulate at all times and with the tank free of damaging scale deposits b at temperatures not 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 26 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 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 4 4 Exclusions The guarantee will be null and void a if the water heater has been damaged
10. burner on or off This gas control block is suitable for gasses from the first second and third gas family The maximum inlet pressure is 50 mbar 1 2 2 Flue down draught safety device The appliance must be fitted with a flue down draught safety device The operation of the safeguard is based on the principle of the Thermal Reflux Safeguard T R S The appliance has been fitted with a T R S see Figure 2 This T R S can be recognized by the brass colored helix coil which is connected to the lower edge of the draught diverter The helix coil has been connected to the thermostat by means of a capillary tube The wiring that is connected to the thermostat must be connected to the thermocouple 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 the RESET button has to be pressed first 6 If this failure occurs frequently this indicates that the flue suffers from down draught conditions We advice that necessary remedial actions be carried out by a competent person Important The T R S should never be
11. by an external cause b in case of misuse neglect including frost damage or incorrect use of the water heater c in case of unauthorised alteration modification or repair d in case of ingress into the water heater of chemicals pollutants or contaminants if the hardness of the incoming water is or has been softened below 60 ppm CaCO f if the water heater is effected by corrosive vapours such as those found in hairdressers dry cleaners and laundries or where some industrial degreasing products are used and stored for further information and advise please contact the A O Smith Technical Department 2 4 5 Range of guarantee All replacement water heaters supplied under the terms of this warranty will be supplied ex stock on an F O B basis A O Smith accepts no responsability for carriage labour or other installation costs 4 6 Claims Any claim under this warranty should be initiated with the dealer who originally sold the water heater or with any other dealer or stockist of the warrantors products 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 d
12. cio das Commissioning Filling the water heater Putting into operation oononcccnnncccinnacacinananonanana nano 22 Use is se i 22 Putting out of operation m me 22 Maintenance is e x 28 Fault finding ss aetan e bb ln 24 G ara te ea Rae 26 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 CE marking 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 The water heater tank is manufactured from low carbon sheet steel and is glass lined on the inside In addition the tank is fitted with a sacrificial anode as an extra protection against corrosion A thick PU insulation 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 transfer The flue gasses pass their heat on to the water by means of radiation and convection The flue gasses are guided to the chimney via the draught diverter The exha
13. 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 Clean the pilot burner Blocked chimney Find the cause and remove it Safety thermostat Set the temperature regulator at a lower temperature Thermocouple defective Replace the thermocouple Thermocouple makes no contact Restore the connection Gas supply closed Open the gas tap Down draught supervision not connected Temperature is set too low Connect by sliding the two connectors of the down draught supervision on to the thermocouple Set the temperature regulator at a higher temperature Control knob in position pilot burns Turn the temperature regulator completely clockwise turn control butto to on turn the temperature regulator to the desired position preferably position 4 The appliance no operates fully automatically Control knob in position 0 Flue safety device closed the gas supply Put the appliance into operation Press the reset button if present on the safety thermostat and put the appliance into operation If this occurs more often then you should inform your installer Gas supply closed Open the gas tap and put the appliance into operation Insufficient hot water or none at all Water leakage Possible cause Safety ther
14. e 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 sensed by the Figure 8 Setting the pilot 16 thermostat The main burner will shut down as soon as the preset temperature is achieved Position 1 approximately 30 C Position 2 approximately 40 C Position 3 approximately 50 C Position 4 approximately 60 C Position 5 approximately 70 C At high water temperatures there is more scale buildup in the appliance It is for this reason that it is recommended to place the temperature control knob in position 4 as the accumulation of scale will be reduced In addition a safety thermostat has been fitted This thermostat completely shuts off the gas supply if the water temperature reaches 82 C also extinguishing the pilot burner AOS 0485 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 Check the burner pressure and if necessary
15. e outer and inner door of the combustion chamber Keep the control knob pushed in and press the piezo ignitor several times until the pilot burns see Figure 6 Figure 6 Operation of the gas control block 14 Keep the control button pushed in for approximately 20 seconds After releasing the button the pilot should remain burning If the pilot extinguishes you should wait 5 minutes before repeating the ignition procedure The size of the pilot flame can be adjusted see also Pilot adjustment Subsequently remount the outer and inner door see Mounting the inside door Turn the control button to the ON 4 position Check the burner pressure setting see Fig 9 and adjust if required based on the technical information see section 1 4 Place the temperature control button in the correct position preferably position 4 approximately 60 C The appliance will now operate fully automatically AOS 0484 2 2 3 Removing and replacing the inner door only for the EQ 115 155 models see Figure 7a Procedure 1 Place lip A through the recess on the 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 3 Subsequently slide lip B behind the steel wall see Figure 7a only for the EQH 200 model see Figure 7b Procedure 1 T
16. ith the To do this the temperature regulating knob should be pulled correct injectors from the conversion straight forward Turn the no pr set see tables above 18 no pressure regulation screw down tight see Figure 10 Seal this setting with lacquer Remount the burner in reverse order Open the main gas tap Figure 10 Conversion to another gas 4 b Conversion from LP gas to natural gas Put the pressure regulator into operation To do this the temperature regulating knob should be pulled straight forward Next the red plastic cover that is now visible should be removed Turn the no pr no pressure regulation screw completely up see Figure 10 Seal this setting with lacquer Remount the burner in reverse order Open the main gas tap Set the correct burner pressure see table above 5 If necessary adjust the pilot correctly see Pilot adjustment 6 Fit the correct sticker from the conversion set on the appliance so that it is clear that the appliance has been converted and on which gas the appliance operates 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 1 AOS 0487 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 i
17. mostat has closed the gas supply because the water temperature was too high Corrective action Set the temperature regulator at a lower temperature and reignite the pilot burner Hot water storage empty Cause cannot be determined Condensation of flue gasses Reduce the consumption of hot water Allow the appliance time to heat the water Turn the control button to the position Close the gas tap and inform your installer See Condensation Insufficient sealing of the water connections thread Tighten the threaded connections Leakage from other water appliances or pipes near by Trace the cause Condensation leakage from the underside of the appliance usually during the first warming up period Reduce your hot water use Allow the appliance enough time to warm up water 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 If within one year of the original installation date of the water heater any part or component other than the tank shall prove upon examination by the warrantor or authorised agent to be defective in material or work manship the warrantor will exchange such part or component 4 2 Guarantee of the tank If within 3 years of the original installation date the tank fails due to rust or corrosion from the w
18. ply pressure Burner pressure Gas consumption Diameter main orifice Diameter pilot orifice GENERAL Storage capacity litres 109 144 181 Water connections 34 14 NPT 34 14 NPT 34 14 NPT Gasconnection ISO 7 Rp ISO 7 Rp ISO 7 Rp Drainvalve 8 14 NPT 3 14 NPT 8 14 NPT Anode 34 14 NPT 34 14 NPT 34 14 NPT T amp P plug 3 4 14 NPT 34 14 NPT 3 14 NPT Maximum operating pressure 8 8 8 Empty weight 47 52 75 Gasconsumption at 1013 25 mbar and 15 C For aleak proof sealed connection European coupling pieces can be used on the NPT connection nipples with a pipe thread of ISO228 1 10 2 FOR THE INSTALLER 2 1 Installation instructions This water heater must be fitted in a location which will permit the provision of an approved flue system and adequate ventilation A service clearance of 15 cm at the sides and rear of the unit and 60 cm at the front of the unit should be allowed for ease of servicing Adequate distance must be allowed between the top of the unit and any obstruction or ceiling to allow the flue baffle and anode to be inspected cleaned or in the case of the anode replaced if necessary The water heater must stand on a level surface resistant to heat and with sufficient strength to support the weight of the unit when full of water This water heater must not be installed in a bath
19. ppliance 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 2 10 3 Hot water temperature too low 1 Check the setting of the temperature control knob 2 Check whether the pilot is alight If necessary ignite see Putting into operation 3 Check whether there are any leaks or open taps 4 Is the gas supply adequate Check and correct if necessary 5 Perhaps the hot water consumption is higher than was originally calculated 6 Check whether the cold water inlet has been correctly connected 7 Check the thermostat sensor for scale build up 2 10 4 Hot water temperature too high Check whether the control thermostat is set too high 2 10 5 Possible water leakage 1 Check whether the drain tap is fully closed 2 Check whether all water connections are water tight 3 Check whether the possible water leakage could be caused by condensation 2 11 Gas smell Warning Immediately shut the main gas tap Do not light any fire or switch on any lights do not use any electrical switches or alarm bells Open windows Thoroughly inspect all gas connections and if the gas smell persists alert the local gas company and or your installer 2 12 Condensation If the
20. put out of operation Reentry of flue gasses to the building could be harmful and cause poisoning or death 7 AOS 0479 Figure 2 Gas control block with T R S 1 T R S thermostat 2 Sensor combustion products dicharge safety device 3 Thermocouple with built in interrupter Thermocouple Gas control block Reset button Pilot burner Temperature regulator knob at oS 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 EQH200 A B D F G K L M N R 5 V 1 Cold water inlet Hot water outlet Gas control valve Drain valve T amp P valve tapping All dimensions are given in mm rounded off on 5 mm AOS 0481 Figure 3 Dimensions 1 4 Technical data Device category II2H3 DESCRIPTION DATA NATURAL GAS G20 20 mbar Nominal load gross Nominalcapacity Suppy pressure Burner pressure Gas consumption Diameter main orifice Diameter pilot orifice Heating time AT 44 K DATA BUTANE G30 28 30 mbar Nominal load gross Supply pressure Burner pressure Gas consumption Diameter main orifice Diameter pilot orifice DATA PROPANE G31 37 mbar Nominal load gross Sup
21. reset by means of the adjusting screw pr adj pressure adjustment see Figure 9 To make this possible the temperature control Figure 9 Setting the nominal load knob should be removed by pulling it straight forward making the pr adj visible Turning clockwise reduces the pressure turning anti clockwise increases the pressure lt is recommended to check the heat input by means of the gas meter 4 Turn off the appliance and remove the manometer hose and replace the adjusting screw 5 Replace the thermostat control knob 6 Put the appliance into operation 2 7 Converting to another type of gas For conversion of the appliance from natural gas to another type of gas or vice versa it is necessary to exchange the pilot injector and the main injector The conversion may only be executed by a qualified competent person AOS 0486 17 Description Inlet pressure Burner pressure Diameter main injector Diameter pilot injector Description Inlet pressure 2x0 27 0 22 EQH 200 Burner pressure Diameter main injector Diameter pilot injector Procedure 1 Close the main gas tap in the gas supply 2x0 27 0 22 4 a Conversion from natural gas to LP gas Put the pressure regulation of the 2 Demount the burner see Cleaning gas control block out of operation 3 Replace the injector of the main burner and the pilot burner w
22. room bedroom or in a cup board opening on to such rooms This water heater must not be installed in any area where flamable materials are used or stored Insufficient ventilation may give rise to a risk of fire explosion or suffocation If in doubt consult the national and local regulations governing the installation of gas appliances or your local British gas service department 2 1 1 Installation The installation of this water heater should be carried out by a suitably qualified competent person It is a criminal offence for unqualified persons to install gas equipment Installation should be carried out in accordance with all local authority and building regulations local water authority and fire regulations and the following British standards 5440 5546 6644 6700 6798 and 6891 Some chemicals produce vapours which can cause rapid failure of thermocouples burners and storage tanks if they are drawn into the combustion air supply Therefore if this water heater will be used to supply hot water to hairdressers dry cleaners industrial degreasing processes or any other area where compounds containing halogens are used and stored care should be taken that all primary and secondary air is drawn from outside atmosphere free of such contaminents For further advise contact A O SMITH 2 1 2 Water connections A O Smith water heaters are suitable for connection to vented unvented and pumped pressurised
23. s therefore recommended that the anode be inspected and replaced if necessary at least once a year 1 Close the stop cock in the cold water supply pipe 2 Open the nearest hot water tap in order to allow the pressure to drop from the water heater and the pipes 3 Slacken the anode with a fitting wrench 4 Check the anode and replace it if it has been reduced in diameter by 60 or more at any point on its length 5 Check for water leaks If it is necessary to replace the anode it should always be replaced by one of the same type The type of anode required can be determined on the basis of the type of the appliance and the serial number 19 2 8 2 Cleaning 1 Close the gas supply and demount the burner after it has cooled down 2 Disconnect the burner pilot pipe and thermo couple from the gas control block see Figure 11 3 Remove the complete burner 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 7 Re mount in reverse order Tighten the thermo couple connection on the gas control block hand tight and tighten it further with a wrench to a maximum of 1 4 turn as it only needs to make contact After cleaning of the pilot and main burner the operation of these should be checked If necessary the burner pressure of the main burner should be reset Figure 1
24. supply if the water temperature reaches 82 C also extinguishing the pilot burner 3 1 4 Putting out of operation 1 For short periods of time the control knob should be turned to X the pilot keeps burning 2 For longer periods of time the knob should be turned to the e position the pilot is extinguished 3 Close the gas tap in the supply pipe In case of longer interruptions or in the event of risk of frost it is recommended to also close the cold water tap and to drain the appliance after cooling open the drain tap it is possible to connect a drain hose to the drain tap open the nearest hot water drain point to prevent airlocks To be able to drain the appliance completely it should be disconnected and tilted slightly in the direction of the drain tap 3 1 5 Maintenance The inlet combination has to be tested regularly by relieving it via the relief button The water has to flow out in a forceful jet Check whether the discharge pipe is open We recommend a service agreement on an annual basis To be able to order spare parts it is important 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 23 3 2 Gas smell Pilot extinguishes Insufficient hot water or none at all Fault finding Possible cause Blocked pilot burner Corrective action If you smell gas you should immediately
25. tton pushed in for approximately 20 seconds After releasing the button the pilot should remain burning If the pilot extinguishes you should wait 5 minutes before repeating the ignition procedure 6 Subsequently remount the inner and outer door see Mounting the inside door 7 Turn the control button to the ON 4 position 8 Place the temperature control button in the correct position preferably position 4 approximately 60 C The appliance will now operate fully automatically 22 3 1 3 Use The appliance is under water supply pressure with a maximum of 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 sensed by the control thermostat The main burner will shut down as soon as the water temperature returns to the preset temperature Position 1 approximately 30 C Position 2 approximately 40 C Position 3 approximately 50 C Position 4 approximately 60 C Position 5 approximately 70 C Higher water temperatures will cause more scale build up in the appliance It is for this reason that it is recommended to place the temperature control knob in position 4 as the accumulation of scale will be reduced at lower temperatures In addition a safety thermostat has been fitted This thermostat completely shuts off the gas
26. urn down both clamps 1 2 Place the entire door into the appliance and move the opening over the burner venturi 3 Turn both clamps outward 3 pushing them over the edge of the burner chamber 23 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 X the pilot keeps burning 2 For longer periods of time the knob should be turned to the 6 position the pilot is extinguished 3 Close the gas tap in the supply pipe In case of longer interruptions or in the event of risk of frost it is AOS 0520 Figure 7a Mounting the inside door IMD 0359 Figure 7b Mounting the inside door 15 recommended to also close the cold water tap and to drain the appliance after cooling open the drain tap it is possible to connect a drain hose to the drain tap open the nearest hot water drain point to prevent air locks To be able to drain the appliance completely it should be disconnected and tilted slightly in the direction of the drain tap 2 5 Temperature regulation The appliance is under water supply pressure maximum 8 bar Th
27. ust of the flue gasses is realized by natural thermal draught see Figure 1 Dead legs a hot water installation are undesireable Where possible they should be avoided Where the inclusion on the system of a dead leg is unavoidable the following restrictions should be applied for pipes not exceeding 19 mm inside diameter maximum lengh of dead leg permitted 12 0 metres for pipes exceeding 19 mm but not exceeding 25 mm inside diameter maximum length of dead leg 7 5 metres for pipes with an inside diameter exceeding 25 mm maximum dead leg 3 0 metres LC Ne BOS HE OS N HS 2 2 7 2 I IINISSSSS AOS 0478 Figure 1 Cross section of the heater 1 Draught diverter 9 Outer casting 2 Hot water outlet 10 Flue baffle 3 Insulation 11 Sacrificial anode 4 Flue tube 12 Drain valve 5 Glass lined tank 13 Atmospheric burner 6 Gas control valve 14 Pilot light burner with thermocouple 7 Cold water inlet 8 T amp P valve connection 1 2 Technical safety equipment 1 2 1 Gas control valve 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 This gas control block with its simple and secure control respectively switches the gas supply to the main
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