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ROTEX GCU compact -
10 x Faults and malfunctions
10.5 Emergency operation
If the settings on the electronic control are incorrect, an emer-
gency heating operation can be maintained. To do so, activate
the special function "Manual Operation" on the control (see en-
closed operating instructions "ROTEX RoCon BF control").
When the 3-way valves are intact, the ROTEX GCU compact will
switch to h
eating operation. The necessary flow temperature can
be adjusted with the rotary switch.
A pressure charge can be achieved in the special function
"Manual Operation" as follows,
a) by setting up manual parallel operation (see
section 10.5.1). Requirements and procedures are identical
to those in chapter 4.11.4.
or
b) by removing the valve drive of the 3-way valve (fig
.4-28,
item 5.1) from the valve;
–
–GCU com
pact 5xx(BIV): 3UV DHW (fig. 3-4).
Ɣ Press the unlocking button (fig. 4-28, item 5.
2) and rotate
the motor head of the valve drive 1/4 turn to the left
(bayonet system).
Room heating is not possible while the valve drive is
removed.
10.5.1 Parallel operation
If the 3-way valve drive is defective or disconnected from the
power supply, a manual parallel operation of heating circuit and
storage tank charging circuit can be set up temporarily. This is
only possible when the 3-way valve concerned is in the position
"AB-B" (hand lever faces away from the valve body). The pro-
cedure is identical to the one in chapter 4.11.4.
GCU compact 3xx(BIV): 3UV DHW (fig. 3-1)
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