Checking The Function Of The Safety Equipment; Checking The Electrical Connections; Filling, Flushing And Checking The Solar Thermal System For Leaks - Viessmann VITOSOL-F Service Instructions Manual

Commissioning, inspection, maintenance
Checking pressure conditions, adjusting the...
The following values result at 10 m static head (example)
Solar thermal system pressure
1
Supplement, static head 0.1 bar/m
2
System pressure (pressure gauge)
3
Pressure reserve for venting
Charge pressure
System pressure (pressure gauge) af-
ter venting
Deduction for hydraulic seal
4 Supplement per m of height difference
between pressure gauge and expan-
sion vessel
5 Pre-charge pressure, expansion
vessel
Note
Record the "pre-charge pressure" on
the expansion vessel.

Checking the function of the safety equipment

Check the safety valve:
■ Response pressure
■ Correct installation, with discharge pipe

Checking the electrical connections

Check the tightness of the electrical plug-in connectors
and cable grommets check cables for damage.
;

Filling, flushing and checking the solar thermal system for leaks

!
Please note
Filling and commissioning the solar thermal sys-
tem without first safeguarding the heat transfer
results in thermal stress.
Cover the collectors and keep them covered
until the heat transfer has been regulated.
8
(cont.)
Vitosol-FM
3.0 bar
1.0 bar
4.0 bar
+ 0.1 bar
4.1 bar
4.0 bar
0.3 bar
−
0.1 bar x 1 m = 0.1 bar
3.8 bar
Accessories for flushing and filling the solar thermal
■
system:
Flushing and filling facility (filling trolley and
–
charging station)
These contain a high speed pump with a high
pump rate, a filter and a container for heat transfer
medium.
Fill valve set, consisting of shut-off valve, drain
–
valve and fill valve.
■ Flush the solar thermal system with heat transfer
medium. Otherwise there is a risk that residual water
from flushing may become mixed with the heat trans-
fer medium. This would alter the properties of the
heat transfer medium.
Flush brazed copper pipes very thoroughly. Any
■
residual scale may compromise the operation of the
solar thermal system.
Vitosol-F
1.0 bar
1.0 bar
2.0 bar
+ 0.1 bar
2.1 bar
2.0 bar
0.3 bar
−
0.1 bar x 1 m = 0.1 bar
1.8 bar