Covering The Collector Array; Installation - Viessmann Vitosol-F Installation Instructions Manual

Covering the collector array

Commission the solar thermal system as quickly as
possible once the collectors have been installed.
To reliably prevent steam hammer, the collectors must
be cold when filled. Cover the collector arrays.
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.

Installation

!
Please note
Incorrect installation can lead to collector dam-
age.
Use only gunmetal or brass fittings and copper
pipes for the installation.
Never step on the collectors.
Never solder on or near the collectors.
■ Route pipes so that complete ventilation is ensured.
Install an air separator in the solar flow upstream of
the DHW cylinder.
Note
An air separator is integrated into the flow line of the
Solar-Divicon (see diagram).
■ Braze or press fit the copper pipes in the solar cir-
cuit.
Soft solder could be weakened, particularly near the
collectors, due to the high temperatures that occur
there. Metal seal connections, locking ring fittings or
Viessmann plug-in connections with double O-rings
are the most suitable.
If other seals such as flat gaskets are used, ade-
quate glycol, pressure and temperature stability must
be guaranteed by the manufacturer.
■ Design all connections to be resistant to pressure
and temperature (observe the maximum stagnation
temperature of the collector).
Never use:
– Teflon (inadequate glycol resistance)
– Hemp connections (insufficiently gas-tight)
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!
Equip the system to EN 12975 or EN ISO 9806 with
■
an expansion vessel, safety valve and circulation
pump.
■ The expansion vessel must be approved to DIN
4807.
The diaphragms and seals of the expansion vessel
and safety valve must be suitable for the heat trans-
fer medium.
To calculate the pre-charge pressure, see the
"Vitosol" service instructions.
For operation without a Solar-Divicon, use only
■
safety valves that meet the following conditions:
– Designed for 120 °C and up to 6 bar (0.6 MPa)
– Letter ID "S" (solar) in the component identification
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