A.O. Smith EQH 200 G User Manual

INSTALLATION- AND USERINSTRUCTIONSHOT WATER STORAGE HEATERSUNITED KINGDOM / IRELANDMODELSEQ 115 GEQ 155 GEQH 200 G

10GENERALStorage capacity litres 109 144 181Water connections ** -3/4" - 14 NPT3/4" - 14 NPT3/4" - 14 NPTGas connection - ISO 7/1 Rp 1/

112. FOR THE INSTALLER2.1 Installation instructionsThis water heater must be fitted in alocation which will permit the provisionof an approved flue sy

121) Manual gas valve2) Stop valve3) Expansion vessel4) T&P safety valve5) Non return valve6) Circulation pump7) Drain valveFigure 4 - Connection

132.1.3 Gas connectionThe gas supply to this appliance mustbe installed in accordance with BS 6891(1988).Fit the 1/2" gas supply cock suppliedwit

142.2 Commissioning2.2.1 Filling the water heater1. Close the drain tap.2. Open the cold water tap to the waterheater and open all taps where hotwater

152.2.3 Removing and replacingthe inner door(only for the EQ 115/155 models, seeFigure 7a).Procedure:1. Place lip A through the recess on theright and

16recommended to also close the coldwater tap and to drain the applianceafter cooling (open the drain tap; it ispossible to connect a drain hose tothe

172.6 Setting the nominalheat inputThe gas control has been factorypreset to the water heater nominal heatinput.A further check of the burner pressure

18G20 G30 G31Inlet pressure mbar 20 30 37Burner pressure mbar 10.5 30 37Diameter main injector mm 3.50 1.95 1.95Diameter pilot injector mm 2x0.27 0.22

192.8.1 Sacrificial anodeThe life cycle of the anode is determinedby the quality and the quantity of thewater flowing through the apparatus. Itis the

2Read these installation instructions first before installing the appliance. Carefully readthe user instructions before igniting the appliance. Failur

202.8.2 Cleaning1. Close the gas supply and demountthe burner after it has cooled down,2. Disconnect the burner, pilot pipe andthermo couple from the

212.10 Fault findingIn case of failure the following shouldbe checked.2.10.1 Safety thermostatAll appliances have been fitted with asafety thermostat

223. FOR THE USER3.1 CommissioningWarningInstalling and commissioning (for thefirst time) of this water heater shouldonly be carried out by a qualifie

23and tilted slightly in the direction ofthe drain tap.3.1.5 MaintenanceThe inlet combination has to be testedregularly by relieving it (via the relie

Fault Possible cause Corrective action3.2 Fault findingBlocked pilot burnerBlocked chimneySafety thermostatThermocouple defectiveThermocouple makes no

Fault Possible cause Corrective actionInsufficienthot water, ornone at allWaterleakageSet the temperature regulator at alower temperature and reignite

264. GUARANTEEThe following conditions form theguarantee agreement between A.O.Smith Water Products Company (thewarrantor) and the owner of the waterh

27any other dealer or stockist of thewarrantors products.4.7 No other guarantee orwarranty either expressedor implied is made onbehalf of A.O. Smith W

28MODEL: ...SERIAL NUMBER: ...

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3CONTENTS PAGE1. General. ...41.1 Description

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41. GENERAL1.1 Description of theapplianceConstruction of the water heater is inaccordance with the Europeanstandard for gas heated water storageheate

5Figure 1 - Cross-section of the heater1) Draught diverter2) Hot water outlet3) Insulation4) Flue tube5) Glass lined tank6) Gas control valve7) Cold-w

61.2 Technical safetyequipment1.2.1 Gas control valveThe water heater has been fitted with agas control block consisting of athermo-electrical pilot f

7Figure 2 - Gas control block with T.R.S.1) T.R.S. thermostat2) Sensor combustion productsdicharge safety device3) Thermocouple with built-ininterrupt

81.3 Technical description1.3.1 DimensionsThese water heaters are only suitablefor a flue tube with minimal theannounced diameter (dimension G).Dimens

9Figure 3 - DimensionsAOS 0481