Owner’s Guide
23
Fluctuations in hot water temperatures.
• Set water temperature at 48°C to 50°C. This will
allow you to use a higher flow of hot water thus
meeting the minimum flow requirement*.
* 32 litre models: 2.0L/min,
other than 32 litre models: 2.5L/min
• Clean the inlet water filter of any debris (See
page 21)
Amount of Hot Water
The amount of hot water at a certain fixture is
not constant.
• When hot water is demanded at other fixtures,
the amount available may be reduced.
The maximum flow available from a 32 litre
model is 32L/min, 26 litre model is 26L/min,
from a 21 litre model is 21 L /min, from a 17 litre
model is 17 L /min at a 25˚C temperature rise.
• Pressure fluctuations and other plumbing
conditions can cause the temperature and
pressure at a fixture to be unstable, but it should
stabilize after a short time.
• There are some types of hot water taps that
discharges large volumes of hot water at first but
stabilize after time.
• To keep the temperature stable, the Water
Heater limits the amount of water that can flow
through it to a small amount initially, but the
amount increases over time.
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 21)
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 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.
(Condensing model only)
Frequent water discharge from the condensate
drain pipe.
• Condensation forms inside the Water Heater
during operation and is discharged from the
condensate drain pipe.
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.
SBB816U取説GQ-C2434WS DU#B.indd 23 2019/11/12 11:53:48
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