Wolf CGB-75 Installation And Operating Instructions Manual page 25

The functions of output A1 can be scanned and adjusted with eBUS-enabled Wolf control accessories.
The following functions can be allocated to output A1:
Code Meaning
0 No function
Output A1 is not controlled
1 DHW circulation pump 100%
Output A1 is activated by control accessories (timed) if DHW has been enabled. Output A1 is constantly switched
if no accessory controller is installed.
2 DHW circulation pump 50%
Output A1 is activated in cycles by control accessories (timed) if DHW has been enabled. 5 minutes ON and
5 minutes OFF. Output A1 is constantly cycled in 5 minute intervals when no accessory controller is installed.
3 DHW circulation pump 20%
Output A1 is activated in cycles by control accessories (timed) if DHW has been enabled. 2 minutes ON and
8 minutes OFF. Output A1 cycles constantly when no accessory controller is installed.
4 Alarm output
Output A1 is switched 4 minutes after a fault.
5 Flame detector
Output A1 is switched after a flame has been detected
6 Cylinder charging pump (factory setting for A1)
Output A1 is activated during cylinder heating.
7 Ventilation damper
Output A1 is switched first prior to each burner start. The burner will, however, only be enabled after input E1 has
been closed.
Important: Input E1 must also always be programmed as
"Ventilation damper"!
The feedback to input E1 must be by means of a floating contact (24V). Otherwise, use an on-site relay for
potential separation.
8 External ventilation
Output A1 is switched inverse to the gas combination valve.
Switching off external ventilation (e.g. extractor fan) during burner operation is only required if the appliance is
operated in open flue mode.
9 External LPG valve
Output A1 is activated in parallel to the gas combination valve.
10 External pump
Output A1 switches synchronously with the heating circuit pump (HKP); used for example with system separation.
According to DVFG-TRF 2012 chapter 9.2, an additional on-site LPG valve is not required if it has been ensured that no potentially hazardous
1)
quantity of gas can escape from the appliance. CGB condensing boilers fulfil this requirement.
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12. Electrical connection
1)
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