Instruction/ maintenance manual of the product BFM 50 A.O. Smith
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BFM 30 BFM 50 BFM 80 MODELS INST ALLA TION INSTRUCTIONS AND USERS MANUAL UNITED KINGDOM CLOSED COMBUSTION W A TER HEA TER.
2 INTRODUCTION Read the installation instructions before installing the water heater. Read the user-instructions before lighting the water heater. If these instructions are not followed carefully, this may lead to explosion and/or fire and can cause material damages and/or physical harm.
3 CONTENTS PAGE 1 . GENERAL 1.1 Water heater description .................................................................................................... ................. 5 1.2 Technical safety equipment ..........................................
4 Figure 1 1 ) TOP-BOX 9 ) VENTILATION FAN 2 ) AIR PROVING SWITCH 10 ) ANODE 3 ) TEMPERATURE REGULATOR 1 1) FLUE TUBES ON/OFF SWITCH 12 ) FLUE BAFFLE RESET-KNOB 13 ) DIAPHRAGM 4 ) BURNER CONTROLLER 14.
5 1. GENERAL 1.1 Description of the appliance Construction and fitting out of the storage appliance comply with the European Standard for gas fired hot water storage appliances for sanitary use (EN89). The appliance thereby satisfies the requirements of the European Directive for Gas Appliances, and is therefore entitled to bear the CE mark.
6 1.2 Technical safety equipment 1.2.1 Gas control The water heaters are equipped with a gas control valve which regulates the flow of gas to the burner. The combination gas control is equipped with a safety valve, gas control valve, pilot safety valve and burner control (on a standard natural gas setting) 1.
7 Figure 3 - Differential pressure switch Figure 2 - Positioning ventilation.
8 1. 3 Technical description 1.3.1 Measurements See figure 4 All dimensions in mm, rounded up to the nearest 5 mm. Size BFM 30 BFM 50 BFM 80 A 1995 1995 2020 B 1795 1795 1820 C 600 600 600 D 520 520 5.
9 Figure 4 I MD- 0057 -R0.
10 Description Unit BFM 30 BFM 50 BFM 80 DATA NATURAL GAS G 20 Nominal gas inlet pressure mbar 20 20 20 Burner pressure mbar 12.5 12.5 12.5 Input k W 2 9 4 7 7 5 Output to water kW 2 7 4 2 6 8 Gas consumption* m3/h 3. 0 4 .7 7. 9 Diameter main injector m m 2.
11 I MD- 0065 2 . FOR THE INSTALLER If possible, use a trolley or fork-lift truck to move the water heater. Always move the water heater in an upright position.
12 I MD- 0066 -R0 Depending on the length and insulation of the water piping and the water demand frequency, it may be necessary to install a circulation system on the drain cock. The return pipe of the circulation piping can be fitted on the top of the drain cock after the sealing plug has been removed (see figure 6).
13 I MD- 0059 Depending on the water demand pattern (e.g., small amounts frequently), it may be necessary to circulate the water in the water heater to prevent temperature stratification. Therefore, we recommend that a circulation system is installed in the event of such demand patterns (see figure 8).
14 Flue configuration / horizonal discharge BFM-unit Measurement BFM 30 BFM 50 BFM 80 min. max. min. max. min. max. A 0 7000 0 7000 0 7000 B 0 7000 0 7000 0 7000 A +B < 7000 < 7000 < 7000 All measurements are in mm. The following applies for the horizontal pipe: slope of at least 5 mm per metre of pipe to the water heater.
15 I MD- 0061 I MD-00 62 Figure 10 and 11 - Roof discharge. All measurements are in mm. The following applies for the horizontal pipe: slope of at least 5 mm per metre of pipe to the water heater. A maximum of 2 bends (45° or 90°) may be used with Flue configurations roof discharge BFM-unit Measurement BFM 30 BFM 50 BFM 80 min.
16 2.1.6 Electrical connection All electrical connections must be carried out by a registered electrical contractor to the relevant regulations. The BFM must be connected to a supply voltage by means of a permanent electric connection and have a feeder cable not less than 3 x 1,0 mm².
17 Figure 12 - Electrical connection diagram BFM I MD 0055 R1.
18 Figure 13 - Connection diagram control-column. D) Transformer 230 E) Air proving switch F) EMC single phase filter G ) RESET knob H) Thermostat frost K) Thermostat regulation L ) Switch ON/OFF M ) .
19 2. 2 Turning the water heater on 2.2.1 Filling the water heater 1. Assemble the drain-off tap and check that it is closed. 2. Open the cold water tap to the water heater and open a l l taps on hot water outlet points to vent them. The heater is filled as soon as cold water pours out of all outlet points.
20 Figure 14 - Checking the gas pressures 2. 5 Checking the gas pressures The nominal load has been set at the correct value in the factory. A further check of the pressure should be carried out during the commissioning of the unit. A dangerous situation can occur if the following instructions are not followed carefully.
21 2. 6 Conversion to another gas Important: Install a gas valve suitable for the type of gas to be used. If the water heater has to function on a gas category (LP or natural gas) other than the gas set as standard (ex works), the water heater must be converted to the applicable gas category with the associated conversion kit(s).
22 2 . 7 Maintenance The water heater must be checked and cleaned regularly (at least once a year) by an accredited installer, so that proper operation is guaranteed. The bar burners, control and safety valves must also be checked. (see figure 17). 2.
23 2.10 Condensation If the water heater has been filled with cold water or if the hot water usage has been very high, normally condensation of the flue gasses will occur on the cold sides of the combustion chamber and the flue tubes. The water drops will fall on to the burner bed which can cause a hissing sound.
24 3 . FOR THE USER 3.1. Instructions for use Installation and commissioning of the water heater should only be undertaken by a registered installer. 3.1.2 Filling the water heater 1. Assemble the drain-off tap and ensure it is closed; 2. Open the cold water tap to the water heater and open a l l taps on hot water drain-off points to vent them.
25 No or insufficient hot water. Check whether the electricity is turned on. Check whether the gas supply is turned on. Does the ON/OFF switch light up? Does the RESET switch light up? Push RESET switch up to three times Is the water heater in operation? Consult your installer.
26 4. 2 Fault finding INSTALLER Check if ON/OFF switch is in position 1 ? Put ON/OFF switch in position 1 . Problem solved yes Is the water heater in operation? Problem solved yes Is the water heater .
27 4. 3 Detailed fault finding INSTALLER no Check voltage present at connection 1 . Reinstate voltage supply no Ensure connections correct, if yes replace FILTER Ensure connections correct, if yes rep.
28 Ensure connections correct, if yes replace MAXIMUM THERMOSTAT Check voltage present at GATE 12 MAXIMUM THERMOSTAT? Check voltage present at GATE 1 BURNER AUTOMATION S4560D 1150? Check voltage prese.
29 yes yes yes yes yes yes yes yes no no no no no no no Check voltage present at GATE 12 ECO Check voltage present at GATE 11 BURNER AUTOMATION Pressure H higher then 300 PA? Pressure L less then 0 PA.
30 Re-instate gas supply and reset water heater Water heater in in operation? Gas supply present? Problem solved IONISATION PROBLEMS. Carry out 3 RESET cycles to make sure the pilot is provided with gas. Check gasconnections towards the pilot burner. Carry out one more RESET cycle.
31 5 . WARRANTY The following conditions form the guarantee agreement between A.O. Smith Water Products Company (the warrantor) and the owner of the water heater.
32 0305 664 R0.
An important point after buying a device A.O. Smith BFM 50 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought A.O. Smith BFM 50 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data A.O. Smith BFM 50 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, A.O. Smith BFM 50 you will learn all the available features of the product, as well as information on its operation. The information that you get A.O. Smith BFM 50 will certainly help you make a decision on the purchase.
If you already are a holder of A.O. Smith BFM 50, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime A.O. Smith BFM 50.
However, one of the most important roles played by the user manual is to help in solving problems with A.O. Smith BFM 50. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device A.O. Smith BFM 50 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
