A.O. Smith BFM - 120, BFM - 100 manual Gas control for BFM

Models: BFM - 100 BFM - 120

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Gas control for BFM 120

Legend

1. burner pressure regulator

3.burner pressure regulator adjustment screw

6.supply pressure test nipple

7.gas control

8.manifold test nipple

6

7

3

8

1

IMD-0257 R1

1.Isolate the appliance from the power supply (10.3 "Isolating the appliance from the mains").

2.There are two test nipples on the gas control. Test nipple (6) is used to check the supply pressure. The other test nipple on the gas control is not used. The manifold test nipple (8) is used to measure the burner pressure.

Sealing screws are located inside the test nipples. Loosen both sealing screws by a few turns. Do not completely loosen them; they can be difficult to re-tighten.

3.Connect a pressure gauge to the manifold test nipple (8).

4.Open the gas supply and bleed the air from the mains gas supply via test nipple (6).

5.Connect a pressure gauge to the manifold test nipple (6) when gas starts to flow from this nipple.

6.Switch on the power to the appliance using the isolator on the appliance.

7.Set the control thermostat to the maximum temperature and start the appliance running by setting the ON/OFF switch to position I.

8.The heating cycle will start, and after a short time the burner tray will ignite.

9.After the burner tray has ignited, wait approximately 1 minute before reading the dynamic pressures.

10.Use the pressure gauge to read the supply pressure at test nipple (6). Refer to the gas data table (3.4.3 "Gas data").

Note

Consult the mains gas supply company if the supply pressure is not correct.

Instruction manual BFM

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A.O. Smith BFM - 120, BFM - 100 manual Gas control for BFM