4
Set-up and installation
Installation and operating instructions
35
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
4.7.5
RoCon M1 mixer module
The RoCon M1 mixer module can be connected to the GCU com-
pact (J13 circuit board connector) and is controlled by the electronic
boiler controller.
INFORMATION
Separate installation instructions are included with this
component. See the enclosed control system manual for
instructions on setting and operation.
4.7.6
RoCon U1 room controller
A separate RoCon U1 room controller can be connected for each
heating circuit to enable remote adjustment of operating modes and
room target temperatures from another room.
INFORMATION
Separate installation instructions are included with this
component. See the enclosed control system manual for
instructions on setting and operation.
4.7.7
RoCon G1 Internet gateway
The controller can be connected to the internet with the optional Ro-
Con G1 gateway. This enables remote control of the GCU compact
by mobile phones (by app).
INFORMATION
Separate installation instructions are included with this
component. See the enclosed control system manual for
instructions on setting and operation.
4.7.8
Room thermostat
INFORMATION
A separate manual containing instructions about installa-
tion and operation is included with this component.
Fig. 4-38
Room thermostat connected by cable (example of RT =
RKRTW)
Fig. 4-39
Room thermostat connected by radio (example of RT-E
= RKRTR)
4.7.9
External switching contact
Connection of an external switching contact (
) enables
changeover of the operating mode on the GCU compact.
The current operating mode is switched by a changing resistance
value (
). The changeover of the operating mode is only ef-
fective for a long as the external switching contact is closed.
The operating mode has an effect on the direct circuit of the
GCU compact as well as all other heating circuits connected to this
device as an option.
The operating mode shown on the controller display may differ from
the operating mode
activated in the rotary switch position.
An operating mode activated by the external switching contact is
shown on the controller display by "EXT." followed by the symbol for
the operating mode (see the controller operating instructions).
When special functions (e.g. "Manual Operation") are activated, the
input is not evaluated.
Fig. 4-40
EXT switching contact connection
Operating mode
Resistance RV
Tolerance
Standby
< 680 Ω
± 5 %
Heating
1200 Ω
Reducing
1800 Ω
Summer
2700 Ω
Automatic 1
4700 Ω
Automatic 2
8200 Ω
Tab. 4-4
Resistance values for evaluating the EXT signal
Summary of Contents for GCU compact Series
Page 2: ......
