Glow-worm Compact 24c-AS/1 Installation And Maintenance Instructions Manual page 39

2. Ensure that the hole for the restrictor for the reference
pressure pipe (1) is not blocked (E).
Result:
Hole for the restrictor for the reference pressure pipe is
blocked
▶
Clean the hole by blowing it out using compressed
air.
3. Ensure that the reference pressure pipes (2) and (3)
are not blocked.
Result:
Reference pressure pipes blocked
▶
Clean the reference pressure pipes by blowing
them out using compressed air.
4. Install the unit in reverse order and, in doing so, ensure
that you do not mix up the reference pressure pipes.
–
Observe the illustrated instructions.
12.5.8 Checking the pre-charge pressure of the
expansion vessel
1. Drain the product. (→ Page 40)
1
2. Check the pre-charge pressure of the expansion vessel
at the expansion vessel valve (1).
–
Working materials: U tube manometer
–
Working materials: Digital pressure gauge
Result 1:
≥ 0.075 MPa (≥ 0.750 bar)
The pre-charge pressure is in the permissible range.
Result 2:
< 0.075 MPa (< 0.750 bar)
▶
Fill the expansion vessel in accordance with the
static height of the heating installation; ideally with
nitrogen, otherwise with air. Ensure that the drain
valve is open when topping up.
3. If water escapes from the valve of the expansion ves-
sel, replace the expansion vessel.
4. Fill the heating installation. (→ Page 29)
5. Purge the heating installation. (→ Page 29)
12.5.9 Cleaning the heating filter
1. Drain the product on the heating side.
2. Hinge the electronics box forwards.
0020313973_01 Compact Installation and maintenance instructions
1
2
3
3. Remove the clamp (1).
4. Remove the expansion relief valve (2).
5. Remove the heating filter (3) from its bracket.
6. Rinse the heating filter under running water, against
the direction of flow.
7. If the strainer is damaged or it can no longer be
cleaned sufficiently, you must replace the strainer.
8. Use only new seals.
9. Reinsert the heating filter, the expansion relief valve
and the clips.
12.5.10 Cleaning the condensate siphon
A
C
1. Disconnect the condensate discharge hose from the
lower section of the siphon.
Clean the condensate siphon as shown in the figure →
2.
(A) to (D).
3. Check whether the seal is still present on the heating
heat exchanger.
B
D
E
39