9
x
Service and maintenance
9.2.6 Venting the hydraulic block
1.
Make sure that the automatic vent valve cap is open (fig. 9-5,
item A).
2.
Provide the manual vent valve (fig. 9-6, item B) with a hose
and direct it away from the unit. Open the valve until water
comes out.
3.
Switch on the power supply to the GCU compact.
4.
Activate the air purge (see accompanying controller manual).
By activating the Air Purge, the RoCon BF controller starts a per-
manently defined sequence program with start/stop operation of
the integrated heating circulation pump and various settings of
the 3-way changeover valves integrated in the ROTEX
GCU compact.
Any air present can escape via the automatic vent valve during
the air purge and the hydraulic circuit connected to the ROTEX
GCU compact is evacuated.
5.
Check the water pressure and replenish water if necessary
(see chap. 9.2.4).
6.
Repeat the venting, checking and replenishing process until:
a)
It is completely vented.
b)
There is sufficient water pressure.
B
Manual vent valve
Fig. 9-6
Connecting the vent hose
The activation of this function does not replace correct
venting of the heating circuit.
The heating circuit must be completely full before acti-
vating this function.
Summary of Contents for GCU compact 315
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