Decalcification
Part of the calcium accumulated in the steam generator is flushed away during the automatic flushing and rinsing
cycle, but some of the calcium remains. Therefore it is important that the steam generator's automatic flushing
function is not out of order due to a faulty electric connection. The tank must be flushed after every use.
To prolong its service life and to reduce the need for manual decalcification, we recommend that steam generators
used in public facilities are connected to a water softening filter, which removes the calcium. This is especially
important, if the water hardness exceeds 5° dH (German hardness).
A water softening filter must not generate foam or produce harmful chemicals, which may give incorrect view of the
water level in the tank and cause the temperature switch to trip. (Heating elements will break down after some time.)
Manual decalcification is performed according to the chart below.
In normal private use, the need for decalcification is minimal, as the water is not particularly hard. However, the
steam generator must be decalcified at least once a year. This removes the calcium from the tank walls and heating
elements.
Steam generator decalcification
•
Start the steam generator and let it run until the water in the tank boils.
• Stop the steam generator and wait for about 5 minutes.
• Remove the connecting piece's lid nut at the top of the steam generator.
• Pour the deliming agent (e.g. citric acid) into the tank via the connecting piece
using a funnel.
• Replace the lid nut to the connecting piece and let the agent work.
• The steam generator flushes and rinses the tank automatically after about an
hour and you can use the generator again.
Citric acid deliming agent is odourless and harmless and it does not harm the steam generator's components.
If another type of deliming agent is used, bathing during decalcification is not allowed.
As can be seen from the adjoining chart, the need for manual decalcification depends on water quality, steam
generator output and operation time.
Operation time in hours before decalcification. We recommend using softened water in public facilities
to reduce the need for manual decalcification.
Hours of operation, different hardnesses
Steam generator
output kW
Amount of
deliming agent.
Citric acid
(1 bag 50g)
Softened water
0.01 – 1° dH
Soft water
1 – 3° dH
Hard water
4 – 7° dH
Very hard
water
8 – 20° dH
3.4 kW 2 bags 7,000 2,300 900 350
4.5 kW 2 bags 3,800 1,300 500 190
6.0 kW 2 bags 2,600 900 300 130
7.7 kW 2 bags 1,700 600 200 90
9.5 kW 2 bags 1,500 500 180 80
12 kW 2 bags 1,300 400 160 70
14 kW 2 bags 1,200 300 150 60
Cleaning the steam room
Rinse the seats and the floor with warm water after every use (do not use a pressure washer). Clean the seats
regularly with mild detergent. Use ethyl alcohol or dilutine. Never use abrasives, strongly alkaline detergents or
solvents to clean the steam room seats and walls. Contact the manufacturer if necessary.
It is important to clean the floor carefully all the way to the corners. Use hot water, a brush and floor detergent that
removes dirt and grease.
User and installation manual HNS-T1
6
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