Bosch Appliances WR430-7K manual Filling, Lighting and Operating Instructions, Service Hint

Models: WR430-7K

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OPERATING INSTRUCTIONS

WARNING!

If the water heater has been damaged or exposed to fire or sooting, or if any part has been underwater, do not use. If unit has been operated during construction or alterations and exposed to above normal dust levels the heat exchanger should be examined and cleaned regularly. Operation with dust obstructed fins could be a health hazard. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been underwater and to clean the heat exchanger assembly and water valve.

FILLING

Before proceeding with operation of the water heater make sure that the system is filled with water:

Make sure drain is closed. See figure 8, below.

Open a nearby hot water faucet to permit the water to fill the heater and piping.

Close the hot water faucet after the water flows freely and all air has escaped from the system.

The water heater is now ready to be lit.

TO HEAT EXCHANGER

WATER VALVE

LIGHTING AND OPERATING INSTRUCTIONS

1.STOP! Read the safety information above on this lable.

2.The gas valve must be shut off by putting the ON/OFF switch to position “ ” Wait five (5) minutes to clear out any gas. If you smell gas, STOP! Follow “B” in the safety information above. If you do not smell gas, go to the next step.

3.This water heater is equipped with a safety pilot burner and an automatic ignition control system.

4.Set the ON/OFF switch (flip down cover plate on frontal panel strip) marked / to the " " position. In this position, the water heater is ready to use. (See Fig. 9).

5.Turn the hot water faucet on the minimum flow rate required to activate the heater. The automatic ignition system first ignites the safety pilot burner which then ignites the main burner in about 4 seconds.

6.The pilot flame will extiguish 10-30 seconds after the burners come on. The burners will remain on until the hot water tap is turned off.

7.Vent fan turns on and off with burner.

NOTE: On a first time initial installation, existence of air in the gas supply line and in the water line may cause some ignition delay. In that case, repeatedly open and close the hot water tap in order to restart the ignition process until all the air has been purged.

FROM HEAT

EXCHANGER

DRAIN PLUG

Figure 8

SERVICE HINT

The screen (strainer) in the water valve, located in the inlet of the water valve, may require occasional cleaning due to foreign material in the water supply. This will restrict the flow of water and may affect heater operation and prolong filling time. To inspect the strainer, close the cold water supply valve ahead of the heater, disconnect the S-bend from the inlet of the water valve and remove strainer from inlet. Clean if required, replace strainer in inlet to the water valve, reconnect S-bend and turn on water supply.

Light the water heater in accordance with the instructions on the Lighting and Operating Plate on the water heater. For your convenience, the instructions are repeated here:

TO TURN OFF GAS TO APPLIANCE

Turn off the manual lever on the gas supply line to the heater and set the ON/OFF switch to the OFF ( ) position.

To operate the heater, set the ON/OFF switch to position

”. The switch is located behind the flip down cover plate on the front panel strip.

To shut down the gas to the heater, set the ON/OFF switch to position “ ”.

Figure 9

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Bosch Appliances WR430-7K manual Filling, Lighting and Operating Instructions, Service Hint, To Turn OFF GAS to Appliance