System Is Used (Dcc System) - Viessmann Vitoplex 200 SX2A Service Instructions For Contractors

Checking the expansion vessel and system...
Observe the manufacturer's instructions. Limit pres-
sure fluctuations to the lowest possible differential.
Cyclical pressure fluctuations and more significant
pressure differentials point towards a system fault.
Immediately remedy such system faults, otherwise
other heating system components may suffer damage.
Checking the setting of the temperature controller if a building management

system is used (DCC system)

!
Please note
Shutting down from full load can result in high
material stress and material damage to the
boiler.
If a system with a higher ranking building man-
agement system takes over the temperature
control of the boiler, adjust the settings at the
temperature controller TR. Set the electronic
temperature controller TR to at least 10 K below
the mechanical temperature controller TR of the
Vitotronic.
Checking the firm seating of electrical plug-in connections and cable
grommets
Checking the thermal insulation
Checking the water quality
Observe the instructions in chapter "Water quality requirements".
Enter the amount of top-up water and the total hardness of the feed and boiler water into the table in the appen-
dix on page 25.
The total hardness of the feed and top-up water must not exceed 0.11 °dH (total value of alkaline earths
3
0.02 mol/m ).
≤
The pH value should be between 9 and 10.5.
Commissioning, inspection, maintenance
(cont.)
13