Shutting Down The System; Checking The Thermal Insulation Of The Pipes - Viessmann VITOSOL-F Service Instructions Manual

Further details regarding the individual steps
Information
& Heat transfer media containing gly-
col can be damaged, if they are sub-
jected for long periods to
temperatures above 170 °C (stag-
nation).
Temperatures in excess of 200 °C
result in a slow thermal breakdown
of the 1.2 propylene glycol that can
be recognised by the darkening of
the heat transfer medium.
Furthermore, it can result in the
solar circuit suffering from sludge
and hard deposits, particularly in
conjunction with other contaminants
(cinder, swarf) and air.
& Ensure that the system is properly
cleaned, filled and ventilated after
installation.

Shutting down the system

!
Please note
To prevent equipment damage, cover the collectors before any work on
the components of the solar heating system begins.
Mixing the heat transfer medium with water reduces the frost and corro-
sion protection. Only flush the system with the specified heat transfer
medium. Never mix Tyfocor LS with other heat transfer media.
Electrically isolate the system (e.g. at
a separate MCB/fuse or the main iso-
lator) and safeguard against
unauthorised reconnection.

Checking the thermal insulation of the pipes

Check the thermal insulation of the
pipework for damage and tight fit.
Replace all faulty parts.
Commissioning, inspection, maintenance
(cont.)
& After filling the system with the heat
transfer medium, ensure that the
system is properly vented and that
heat is transferred inside the sys-
tem, i.e. that longer periods of stag-
nation are prevented.
& Blow-off and drain lines must termi-
nate in an open container, that is
capable of collecting the total capa-
city of the collector.
7