Viessmann Vitosol-F Series Installation Instructions For Contractors page 26

Covering the collector array
In the delivered condition, the collectors are covered
with a protective film for this purpose. Remove this
protective film no later than 4 weeks following col-
lector installation.
26
(cont.)
Note
If commissioning takes place at a later date, cover the
collector arrays.
Do not use the protective foil provided to cover the col-
lectors!