Bedienungsanleitung A.O. Smith EQ 280 (Seite 22 von 28) (Englisch)

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3. FOR THE USER

3.1 Commissioning

Warning

Installing and commissioning of this

water heater should only be carried out

by a qualified competent heating

engineer.

Filling the water heater

1. Close the drain tap.

2. Open the cold water tap to the water

heater and open all taps where hot

water can be drained for de-

aeration. The water heater is filled

as soon as cold water flows from all

taps.

3. Close all hot water drain taps.

Putting into operation

1. Check whether the device has been

filled with water and whether the

gas supply to the water heater is

open.

2. Turn the temperature control knob

clockwise and place the control knob

in the ‘PILOT’-position ().

3. Remove the outer door of the

combustion chamber.

4. Keep the control button pushed-in

and press the piezo-ignitor several

times until the pilot burns (see

drawing 6).

5. Keep the control button (✸) pushed-

in for approximately 20 seconds.

After releasing the button the pilot

should remain burning. If the pilot

extinguishes you should wait 5

minutes before repeating the ignition

procedure.

6. Fit the outer door;

7. Turn the control button to the ‘ON’ (

)

position.

8. Place the temperature control button

in the correct position, preferably

position 4 (approximately 60°C). The

appliance will now operate fully

automatically.

3.2 Use

The appliance is under water

supply pressure (with a maximum

of 8 bar). The amount of cold water that

is added is equal to the amount of hot

water used. The gas control block

automatically regulates the gas supply.

The main burner will ignite as soon as a

reduction in water temperature is

sensed by the control thermostat. The

main burner will shut down as soon as

the water temperature returns to the

preset temperature.

Position 1 = approximately 30°C

Position 2 = approximately 40°C

Position 3 = approximately 50°C

Position 4 = approximately 60°C

Position 5 = approximately 70°C

Higher water temperatures will

cause more scale build up in the

appliance. It is for this reason that it is

recommended to place the temperature

control knob in position 4 as the

accumulation of scale will be reduced at

lower temperatures. In addition a safety

thermostat has been fitted. This

thermostat completely shuts off the gas

supply if the water temperature

reaches 82°C, also extinguishing the

pilot burner.

3.3 Putting out of operation

1. For short periods of time the control

knob should be turned to (✸); the

pilot keeps burning.

2. For longer periods of time the knob

should be turned to the (

●) position;

the pilot is extinguished.

3. Close the gas tap in the supply pipe.

In case of longer interruptions or in

the event of risk of frost it is

recommended to also close the cold

water tap and to drain the appliance

after cooling (open the drain tap; it is

possible to connect a drain hose to

the drain tap; open the nearest hot

water drain point to prevent

airlocks).

To be able to drain the appliance

completely it should be disconnected

and tilted slightly in the direction of

the drain tap.

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A.O. Smith EQ 280 Seite 22

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