Preventive Maintenance, Venting | Bosch Appliances W 125...T1

PREVENTIVE MAINTENANCE

PILOT AND MAIN BURNER

Check pilot and main burners at least every 12 months for the proper flame characteristics.

The pilot flame should envelop approximately 10 mm (3/8 inch) of tip of thermocouple.

10 mm

3mm

Figure 6

If the pilot flame is too small, then the pilot burner must be cleaned. The position of the igniter electrode should also be checked to assure that electrode is approximately 3 mm (1/8’’) from pilot, see figure 6.

The main burner should exhibit the following characteristics:

·Provide complete combustion of gas.

·Cause rapid ignition and carryover of flame across burners.

·Operate quickly during ignition, burning and extinction.

·Burner flames should be blue and there should be no lifting of flames from burner ports, figure 7.

If the main burners fail to exhibit above characteristics they must be cleaned, either by blowing them off with compressed air or by washing them in soap and water and rinsing.

If it proves necessary to wash the main burner assembly the following procedure should be used:

1.Turn off the gas supply to the water heater.

2.Disconnect pilot gas tube at the gas valve and unscrew the gas manifold assembly union nut, where the gas manifold inlet pipe connects to the gas valve and remove the gas burner assembly.

3.Wash in soap and water and then rinse.

4.Reassemble - Check for gas leaks after reassembly and correct as required.

5.Refer to Lighting Procedure to relight the heater.

VENTING

The vent piping and finned heat exchanger should be checked at least once a year for dust and carbon deposits and cleaned as necessary.

PRESSURE RELIEF VALVE

At least once a year the pressure relief valve should be checked to insure that if it is in operating condition. Before testing the relief valve take necessary precautions to prevent water damage. Lift the lever on the valve several times until the valve seats properly and operates freely. Do not check the relief valve when hot water is being draw and the main burner is on. Water exiting the valve under these conditions would be hot.

If the pressure relief valve on the appliance discharges this is an indication of water pressure above the pressure rating of the relief valve. If the pressure relief valve continually discharges on a periodic basis contact the water supplier or local plumbing inspector on how to correct the situation. Do not plug the pressure relief valve.

PERIODIC REMOVAL OF LIME DEPOSITS

In hard water areas, depending on frequency of use, the heater should be checked for accumulation of calcium carbonate (lime) and delimed, if necessary. Thereafter a regular schedule, based on initial inspection findings, should be set up to delime the heater. Delivering instructions are available from your Bosch dealer.

Figure 7

W 125...T1, W125K specifications

Bosch Appliances has long been synonymous with innovation, quality, and reliability, and the Bosch W125K/W125...T1 models are no exception. These appliances are thoughtfully designed to enhance user experience while providing advanced functionalities that cater to modern household needs.

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