Checking The Function Of The Safety Equipment - Viessmann Vitoradial 300-T VR3 Service Instructions For Contractors

Commissioning, inspection, maintenance
Fitting the boiler door
Danger
Escaping gas leads to a risk of explosion.
Check the boiler door for tightness.
Checking connections and sensor well on the heating water side for tight-
ness

Checking the function of the safety equipment

Check the safety valves, the water level and pressure
limiters in accordance with manufacturer's details.
Checking the function of the pressure switch
Installation instructions, pressure switch set
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
Note
Observe the information provided by the expansion
vessel manufacturer.
Carry out this test on a cold system.
12
(cont.)