Control Unit Operation - Wolf CGU-2-18 Operating Instructions Manual

Control unit operation

Illuminated signal ring as status
indicator
Note:
3062348_0511
Control unit operation
ON / OFF switch
Illuminated
signal ring
Illuminated signal ring
Flashing green
Constant green light
Flashing yellow
Constant yellow light
Flashing red
Summer mode (heating OFF)
Winter mode position 2 to 8
Emissions test mode
(illuminated ring flashes yellow)
DHW temperature selector,
boiler *
Heating water temperature
selector
* When the hardness of the water is over 15°d.H. (2.5 mol/m³) the cylinder water
temperature may be set to a maximum of 55 °C. This corresponds without accessory
controller to a setting of 5-6 on the DHW temperature selector with gas combi boilers
or 6-7 on gas boilers with cylinders.
The BM programming module can also be integrated into the control unit of gas
fired boilers. That means that all adjustments are made at the control unit of the gas
fired boiler. For installation and operation, see BM programming module operating
instructions.
Reset button
DHW temperature
selector
Heating water
temperature
selector
Explanation
Standby (power supply ON, burner OFF,
e.g. summer mode)
Winter mode: Pump running, burner OFF
Emissions test mode
Burner operates, flame ON
Fault
1 (15 °C) ... 9 (65 °C) Gas boiler with cylinder
1 (40 °C) ... 9 (65 °C) Gas combi boiler
2 (40 °C) ... 8 (80 °C)
Thermometer
Pressure
gauge
7