Checking And Replacing The Heat Transfer Medium If Required - Viessmann VITOSOL 100-F Service Instructions Manual

Further details regarding the individual steps

Checking and replacing the heat transfer medium if required

■ The heat transfer medium provided is
a liquid based on 1,2-propylene glycol
with a pH value of 9.0 to 10.5 and frost
protection down to -28 °C.
■ Have the condition of the medium
checked as part of the annual service
of the solar thermal system by the
heating contractor.
■ The pH value and frost protection tem-
perature can be checked with the
solar service case (accessories).
Solar service case operating
instructions
In some cases the manufacturer of the
heat transfer medium can carry out a
laboratory test of the medium, subject
to arrangement.
■ Manufacturer:
TYFOROP CHEMIE GmbH
Anton-Rée-Weg 7
D - 20537 Hamburg
Email: info@tyfo.de
Internet: www.tyfo.de
1. Check the pH value of the heat trans-
fer medium using the pH strip in the
solar service case.
The colour of the pH strip indicates
the approximate value. If the value is
below 7.5, replace the heat transfer
medium.
Information on replacing the heat
transfer medium
The heat transfer medium can be
mixed with Tyfocor G-LS.
Never mix with water or third party
media.
Commissioning, inspection, maintenance
2. Check the frost protection tempera-
ture of the heat transfer medium with
an antifreeze tester or the manual
refractometer in the solar service
case.
(cont.)
13