Wolf CGU-2-18 Installation And Maintenance Instructions Manual page 28

Programmable
Output A1
Parameter HG14
HG14
6
Explanation
0 No function
Output A1 is not enabled
1 DHW circulation pump 100%
Output A1 is switched by control accessories (BM), if DHW circulation has been enabled. Output A1 is constantly
enabled when no accessory controller is installed.
2 DHW circulation pump 50%
Output A1 is switched by control accessories (BM), if DHW circulation has been enabled. 5 minutes ON and 5
minutes OFF. Output A1 constantly cycled in 5 minute cycles when no accessory controller is installed.
3 DHW circulation pump 20%
Output A1 is switched by control accessories (BM), if DHW circulation 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 controlled after a fault and expiry of 4 minutes.
5 Flame detector
Output A1 is controlled after a fl ame has been recognised.
6 Cylinder primary pump
Output A1 always closes along with the boiler pump in DHW operation. Both with 3-way valve idle period protection
and with pump kick.
7 Ventilation damper
Output A1 is activated before each burner start. The burner will, however, only be enabled after input E1 has been
closed.
Important: In any case, input E1 must also be programmed as "Ventilation damper"!
Note
Otherwise there is a risk of faults.
The feedback to input E1 must be made with a zero volt contact. Otherwise, use an on-site relay for potential
separation.
8 External ventilation
Output A1 is controlled inverted to the burner. Switching OFF external ventilation (e.g. extractor fan) during burner
operation is only required, if the boiler is operated as open fl ue system.
9 External LPG valve
Output A1 switches with the gas combi valve
10 Direct heating circuit pump
Pump switches in accordance with the enabling of the direct heating circuit
11 External pump
Output A1 switches synchronously with the heating circuit pump (HKP). Use with, for example, system separation.
12 Diverter valve
If E1 is programmed for burner blocking (option 8) and closed, A1 switches ON. If E1 is not programmed as burner
blocking, A1 always stays OFF.
13 DHW circulation pump
DHW circulation pump ON for 5 mins, if input E1 is programmed as DHW circulation pushbutton and input E1 Key is
closed.
14 Pump with external burner demand
Synchronous control with input E1 (E1 = 10, ext. burner demand)
15 Constant voltage for accessories
A1 is always closed (constant voltage 230 VAC)
28
Displaying / modifying control parameters
with Wolf control accessories
The functions of output A1 can only be scanned and adjusted with Wolf control
accessories with eBUS capability.
The following functions can be allocated to output A1:
Factory setting: 6
Setting range: 0 to 15
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