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Refilling
Heating water
Complete desalination not required
If there is no aluminium (heat exchanger in the gas
boiler or aluminium radiator) in the system, then costly
complete desalination with ion exchange cartridges or
osmosis is not required.
Lime stabilisation can be dangerous
The addition of lime stabilising agents prevents
limescale. However, we advise against doing this.
These agents increase the salt content and result in an
undefined pH value. If the system is filled with large
amounts of water, exactly the same agent must be
used again. Mixing with other water additives or with
antifreeze can result in corrosion.
13.2
Refilling
Fill up heating water
If water refilling in the heating system is required, for
example to adjust the pressure, the same water as
used during initial filling should be used wherever
possible.
If only a small amount of water is to be replenished
(below 10% the system volume), then normal tap
water can be used. This applies, for example, when
replacing a pump or mixer.
The heating system is never to be refilled with
rainwater, as this is usually contaminated and the
pH value is too low.
Summary of Contents for TWIN 20 kW
Page 1: ...2016 04 02 EN 0000000302 V 001 X 36 0 2303 93412 001 TWIN pellet burner 20 26 kW Operation ...
Page 39: ...ETAtouch controller TWIN function block 39 ...
Page 49: ...ETAtouch controller Buffer function block 49 ...
Page 53: ...ETAtouch controller Hot water tank function block 53 ...
Page 57: ...ETAtouch controller Fresh water module function block 57 ...
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