48
B C
A
1.
Remove retaining clip
A
and pull out
insert
B
.
2.
Clean siphon
C
and check that the
condensate can drain freely.
3.
Fill siphon
C
with water and reas-
semble.
Note
Never twist the inlet hose during
assembly. Route the drain hose with-
out any bends and with a constant
fall.
Checking the diaphragm expansion vessel and system pressure
Note
Check the diaphragm expansion vessel
when the system is cold.
1.
Drain the system or close the cap
valve on the diaphragm expansion
vessel and reduce the pressure until
the pressure gauge indicates "0".
2.
If the diaphragm expansion vessel
pre-charge pressure is lower than the
static system pressure: top up with
nitrogen until the pre-charge pres-
sure is 0.1 to 0.2 bar (10 to 20 kPa)
higher than the static pressure.
3.
Top up with water until the charge
pressure of the cooled system is 0.1
to 0.2 bar (10 to 20 kPa) higher than
the pre-charge pressure of the dia-
phragm expansion vessel.
Permiss. operating pressure: 4 bar
(0.4 MPa)
Checking all gas equipment for tightness at operating pressure
Danger
Escaping gas leads to a risk of
explosion.
Check all gas equipment for tight-
ness.
Note
Only use suitable and approved leak
detection agents (EN 14291) and devi-
ces for the tightness test. Leak detection
agents with unsuitable constituents (e.g.
nitrides, sulphides) can cause material
damage.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5585 174 GB