49
Checking the diaphragm expansion vessel and system pressure
A
Note
Carry out this test on a cold system.
1.
Drain the system, until the pressure
gauge indicates "0".
2.
If the diaphragm expansion vessel
inlet pressure is lower than the static
system pressure: Top up with nitro-
gen via connection
A
, until the inlet
pressure is 0.1 to 0.2 bar.
3.
Top up your heating system with
water and vent until the filling pres-
sure of a cooled system is 0.1 to 0.2
bar higher than the inlet pressure of
the diaphragm expansion vessel.
Permiss. operating pressure: 3 bar
Checking gas equipment for tightness at operating pressure
Danger
Escaping gas leads to a risk of
explosion.
Check gas equipment for tight-
ness.
Note
For the tightness test, use only suitable
and approved leak detecting agents (EN
14291) and devices. Leak detecting
agents with unsuitable contents (e.g.
nitrides, sulphides) can lead to material
damage.
Remove residues of the leak detecting
agent after testing.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5412 755 GB
Service
