Viessmann VITOSOL-F Service Instructions Manual page 13

Further details regarding the individual steps
TYFOROP CHEMIE GmbH
Anton-Rée-Weg 7
D - 20537 Hamburg
e-mail: 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 (accessory).
The colour of the pH strip indicates
the approximate value. If the value is
below 7.5, replace the heat transfer
medium.
Notes on replacing the heat trans-
fer medium
The heat transfer medium can only
be mixed with Tyfocor G-LS.
Never mix with water or third party
media.
2. Check the frost protection tempera-
ture of the heat transfer medium with
a Viessmann antifreeze tester or the
manual refractometer in the solar
service case.
Solar service case operating
instructions
Commissioning, inspection, maintenance
(cont.)
13