Viessmann VITOPLEX 300 Service Instructions Manual page 15

Checking the temperature controller setting 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.
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 to at least 10 K below the
mechanical temperature controller.
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" on page 18 onwards.
The total hardness of the feed and top-up water must
not exceed 0.11 °dH (sum of all alkaline earths ≤ 0.02
mol/m3). The pH value should be between 9 and 10.5.
Cleaning the sight glass in the boiler door
Fig. 5
Note
Check the gaskets and hose connection for tightness.
Checking the mixer for ease of operation and tightness
1. Remove the motorised lever from the mixer han-
dle.
Commissioning, inspection, maintenance
Enter the amount of top-up water and the total hard-
ness of the feed and boiler water into the table on
page 21.
2. Check the mixer for ease of operation.
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