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RM Solar S Class 20 Instrukcja Obsługi Strona 57

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11. Insulation
The use of the correct insulation is critical. Normal central heating insulation will melt and become
brittle at the very high solar generated temperatures in the system.
Insulation materials must endure the highest occurring temperature, which will be more than 170
o
C
near the collector.
Where the insulation is outdoors then it must be:
Resistant to temperatures up to 170°C•
Must have a exibility in - 30°C conditions•
Resistant to air pollution•
Resistance to UV radiation•
Resistance to pests, such as mice and birds that may eat it. In some •
countries the activities of insects require insulation to be “armoured” or
sheathed
Insulation should be externally sealed to prevent it carrying moisture.•
12. Glycol
The glycol is heat exchanging uid with a very low freezing point, already pre-mixed to 40%.
Glycol supplied by RM Solar has following properties:
Glycol 40 % pre - mixed has anti-freeze protection up to -40°C•
Contains anti-corrosion inhibitors for pipe protection•
Glycol is a low toxic polypropylene product approved for use in solar •
systems by all major countries including the USA and EU
The glycol contains a harmless pink dye so that if there is a failure of the •
water cylinder or storage tank, the dye will warn the consumer of that fact
and allow the consumer to call the installer
Glycol has a notably more intensive creeping property than water•
Glycol is not compatible with zinc. So pipes with internal zinc galvanising •
should not be used
Chemical nature: Propane 1.2 with corrosion inhibitors•
As with all chemicals, normal precautions should be taken in handling the •
glycol to prevent
ingestion and delivery into the water system•
Note: Under no circumstances should any ethylene based glycol be used in solar
systems. The material safety data sheet for the RM Solar glycol is available from RM Solar on
request.
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