Thermann Owner’s Guide
Gas Continuous Flow Water Heaters
16
Sounds
The fan can be heard after operation is stopped.
A motor can be heard when turning the Water
Heater on or off, when opening or closing a
fixture, or after the Water Heater has been
running for a while.
• These noises indicate the proper operation of
devices which are designed to let the Water
Heater reignite more quickly, and ensure the
water temperature is stable.
Other
The Water Heater stops burning during
operation.
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water fixture sufficiently open?
• Is the gas being cut off by the gas meter? (Can
other gas devices such as stoves be used?)
• (For ULPG) Is there enough gas in the tank? (Can
other gas devices such as stoves be used?)
White smoke comes out of the flue exhaust on a
cold day.
• This is normal. The white smoke is actually
steam.
The amount of hot water in the bath is less/more
than the set amount.
• When hot water is used for other fixtures while
filling the bath, the bath will not fill as much.
• If there is water in the bath already, or when
filling is stopped and restarted, the bath will fill
more.
The bath fill alarm does not sound even when
filled to the set amount.
• The bath fill alarm is set to sound when hot
water is continuously discharged for the set
volume of water.
If mixing valves are used, or if cold water is
mixed with hot water at the fixture, the bath will
fill more than the setting of the bath fill function.
Amount of hot water available has decreased
over time.
• Is the inlet water filter clogged? (See page 14)
The hot water is turbid.
• This is harmless. Small bubbles appear as the air
in the water is heated and depressurized rapidly
to atmospheric pressure.
The water appears blue.
The bath/wash-basin has turned blue.
• Colouration to a blue colour may be noticed
from small traces of copper ion contained in the
water and fat (furring). However, there are not
problems concerning health. Colouration of the
bath/wash-basin can be prevented by cleaning
frequently.
A small amount of water is discharged from the
pressure relief valve.
• This is normal. When the Water Heater is under
high pressure, a small amount of water may be
discharged from the pressure relief valve.
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