Table of Contents
Advertisement
Commissioning, inspection, maintenance
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 expansion vessel and system pressure
Expansion vessel manufacturer's documentation
Note
Carry out this test on a cold system.
1. Drain the system until the pressure gauge indi-
cates "0" or close the cap valve on the expansion
vessel and reduce the pressure in the expansion
vessel.
2. If the pre-charge pressure of the expansion vessel
is lower than the static system pressure, top up
with nitrogen until the pre-charge pressure is 0.1 to
0.2 bar (0.01 to 0.02 MPa) higher.
The static pressure corresponds to the static head.
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 hard-
ness of the feed and boiler water into the table in the
appendix on page 34.
The total hardness of the feed and top-up water must
not exceed the sum of all alkaline earths of
3
0.02 mol/m
.
≤
12
3. Top up with water until the charge pressure of the
cooled system is 0.1 to 0.2 bar (0.01 to 0.02 MPa)
higher than the pre-charge pressure of the expan-
sion vessel.
Permissible operating pressure: 6 bar (0.6 MPa)
The pH value should be between 8.2 and 9.5.
Advertisement
Table of Contents
