Checking The Function Of The Safety Equipment; Check Electrical Connections - Viessmann Vitosol-T Service Instructions Manual

Further details regarding the individual steps
Documentation of pressure
1 System pressure of the solar thermal system
2 Supplement per metre static ceiling
3 System operating pressure (pressure gauge)
Pressure reserve for venting
Filling pressure
4 Supplement per metre of height difference between pres-
sure gauge — expansion vessel 5
Deduction for hydraulic seal
Pre-charge pressure, expansion vessel 5
Note
Note the pre-charge pressure level on
the expansion vessel. In doing so, spe-
cifically use the term "pre-charge pres-
sure" to prevent misunderstandings.

Checking the function of the safety equipment

Check the safety valve:
■ Response pressure
■ Correct installation, with blow-off line

Check electrical connections

Check the tightness of the electrical
plug-in connectors and cable grommets;
check cables for damage.
Commissioning, inspection, maintenance
(cont.)
Example:
At 10 m static ceiling, the result is:
■ System operating pressure = 2 bar
■ Fill pressure = 2.1 bar
■ Pre-charge pressure = 1.7 bar
1 bar
+ 0.1 bar/m
................ bar
+ 0.1 bar
................ bar
+ 0.1 bar/m
– 0.3 bar
................ bar
7