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Programming Button; Draining The Appliance; Codes Of Errors In The Display; Cleaning The Front Of The Appliance - Bosch OptiFlow Professional GWH12 1 CTD E23 Operating Manual

Gas continuous flow water heater
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8 | Operation instructions
▶ Press the buttons
desired temperature.
Fig. 5
Selecting the required temperature, reduces the energy and
water consumption.
CAUTION:
The temperature indication on the display is
approximate, always confirm with your hand
before bathing children or old people.
3.5

Programming button

Setting the water temperature
Fig. 6
▶ Press the buttons
to be set.
▶ Press the programming button for 3 seconds to set the
temperature.
When the display stops flashing, the temperature is set in the
memory.
Selecting the preset temperature
To select the preset temperature.
▶ Press the programming button for 1 second.
6 720 813 938 (2016/06)
and
until you reach the
6720806146-04.1V
6720806146-05.1V
and
to select the temperature
The display shows the temperature previously set and this goes
on to be the selected temperature.
3.6

Draining the appliance

NOTICE:
Not draining the appliance when a freezing risk
exists may damage components of the
appliance.
If draining the appliance is required, the following process
should be followed:
▶ Shut off the cold water isolation valve on the cold water
inlet off the appliance.
▶ Open a hot water tap.
▶ Remove the connection to the cold water pipe.
▶ Empty all the water contained inside the appliance.
The anti-freeze device protects the appliance
against possible risks of freezing.
Power to the appliance must remain on for the
anti-freeze to be active.
3.7

Codes of errors in the display

See tab. 4 on page 10.
Resetting the appliance
Some of the possible faults may be solved by resetting the
appliance:
▶ Press the button
3.8

Cleaning the front of the appliance

▶ Only clean the front of the appliance with a cloth and some
detergent.
Do not use corrosive and/or abrasive
detergents.
for 3 seconds.
OptiFlow Professional

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