Ao-smith BFM 80 User Manual

BFM 30BFM 50BFM 80MODELSINSTALLATION INSTRUCTIONS ANDUSERS MANUALUNITED KINGDOMCLOSED COMBUSTION WATER HEATER

10Description Unit BFM 30 BFM 50 BFM 80DATA NATURAL GAS G 20Nominal gas inlet pressure mbar 20 20 20Burner pressure mbar 12.5 12.5 12.5Input kW 29 47

11IMD-00652. FOR THE INSTALLERIf possible, use a trolley or fork-lift truck to move thewater heater. Always move the water heater in an uprightpositio

12IMD-0066-R0Depending on the length and insulation of the waterpiping and the water demand frequency, it may benecessary to install a circulation sys

13IMD-0059Depending on the water demand pattern (e.g., smallamounts frequently), it may be necessary to circulate thewater in the water heater to prev

14Flue configuration / horizonal discharge BFM-unitMeasurement BFM 30 BFM 50 BFM 80min. max. min. max. min. max.A 0 7000 0 7000 0 7000B 0 7000 0 7000

15IMD-0061IMD-0062Figure 10 and 11 - Roof discharge.All measurements are in mm.The following applies for the horizontal pipe: slope of atleast 5 mm pe

162.1.6 Electrical connectionAll electrical connections must be carried out by aregistered electrical contractor to the relevantregulations.The BFM mu

17Figure 12 - Electrical connection diagram BFMIMD 0055 R1

18Figure 13 - Connection diagram control-column.D) Transformer 230E) Air proving switchF) EMC single phase filterG) RESET knobH) Thermostat frostK) Th

192.2 Turning the water heater on2.2.1 Filling the water heater1. Assemble the drain-off tap and check that it is closed.2. Open the cold water tap to

2INTRODUCTIONRead the installation instructions before installing the water heater. Read the user-instructions before lighting the waterheater. If the

20Figure 14 - Checking the gas pressures2.5 Checking the gas pressuresThe nominal load has been set at the correct value inthe factory. A further chec

212.6 Conversion to another gasImportant: Install a gas valve suitable for the type ofgas to be used.If the water heater has to function on a gas cate

222.7 MaintenanceThe water heater must be checked and cleanedregularly (at least once a year) by an accredited installer,so that proper operation is g

232.10 CondensationIf the water heater has been filled with cold water or ifthe hot water usage has been very high, normallycondensation of the flue g

243. FOR THE USER3.1. Instructions for useInstallation and commissioning of the water heatershould only be undertaken by a registered installer.3.1.2

25No or insufficienthot water.Check whether theelectricityis turned on.Check whether thegas supply is turnedon.Does theON/OFF switch lightup?Does theR

264.2 Fault finding INSTALLERCheck ifON/OFF switch is inposition 1?PutON/OFF switch inposition 1.ProblemsolvedyesIs thewater heater inoperation?Prob

274.3 Detailed fault finding INSTALLERnoCheckvoltage presentat connection 1.Reinstate voltage supplynoEnsure connections correct,if yes replace FILTER

28Ensure connections correct,if yes replaceMAXIMUM THERMOSTATCheckvoltage present atGATE 12 MAXIMUMTHERMOSTAT?Checkvoltage present atGATE 1 BURNERAUTO

29yesyesyesyesyesyesyesyesnononononononoCheckvoltage present atGATE 12 ECOCheckvoltage present atGATE 11 BURNERAUTOMATIONPressureH higher then300 PA?P

3CONTENTS PAGE1. GENERAL1.1 Water heater description ...

30Re-instate gas supplyand reset water heaterWater heater inin operation?Gas supplypresent?ProblemsolvedIONISATION PROBLEMS.Carry out 3 RESET cycles t

315. WARRANTYThe following conditions form the guarantee agreementbetween A.O. Smith Water Products Company (thewarrantor) and the owner of the water

320305 664 R0

4Figure 11) TOP-BOX 9) VENTILATION FAN2) AIR PROVING SWITCH 10) ANODE3) TEMPERATURE REGULATOR 11) FLUE TUBESON/OFF SWITCH 12) FLUE BAFFLERESET-KNOB 1

51. GENERAL1.1 Description of the applianceConstruction and fitting out of the storage appliancecomply with the European Standard for gas fired hotwat

61.2 Technical safety equipment1.2.1 Gas controlThe water heaters are equipped with a gas controlvalve which regulates the flow of gas to the burner.

7Figure 3 - Differential pressure switchFigure 2 - Positioning ventilation

81.3 Technical description1.3.1 MeasurementsSee figure 4All dimensions in mm, rounded up to the nearest 5 mm.Size BFM 30 BFM 50 BFM 80A 1995 1995 202

9Figure 4IMD-0057-R0