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Setting mode
▷ Press and hold the MODE selection button when
the heater is switched off to go to Setting mode.
ON/OFF
• Switch off the heater
▷ Mode E: eBus addresses can be saved.
Mode A/F: multi-functional outputs can be pa-
rameterized.
Mode E
eBus address
OFF
MFA 2
MODE
button
0 Inactive
1 Fault (NC)
2 Fault (NO)
3 Operation
4 Standby
eBus adddress 1 ... eBus address 8
MODE
button
Save eBus address
▷ Press the RESET button to return to the previ-
ous menu.
▷ After a timeout of 20 s, the display will auto-
matically return to the initial mode. The display
indicates "–".
GP_40_ACU_NF.indd 8
OFF
1
2
AUTO
3
4
5
+AUT
O
MODE
(RESET)
.
Mode A/F
MFA 1
MODE
button
0 Inactive
1 Main fan
active
2 Main fan
inactive
3 Modulation
enable
MODE
button
GB-8
Adjusting the heater
Burner gas pressure p
G
p
= Inlet pressure
u
p
= Gas pressure on the burner
G
▷ The gas pressure on the burner is adjusted using
p
on the combination control.
G
p
u
▷ For this, the outlet pressure p
ured on the combination control.
1 Disconnect the system from the electrical power
supply. The mains plug may only be pulled out
once the device has been switched off and post-
cooling is complete.
2 Shut off the gas supply.
3 Open pressure test point p
4 Switch on the power supply.
5 Release the gas supply.
OFF
1
▷ The inlet pressure p
must comply with the tech-
2
AUTO
u
3
nical data, see page 23 (Technical data).
4
5
+ AUT
O
6 Switch on the burner control unit. Press the
ON/OFF
MODE
(RESET)
ON/OFF button
until an LED lights up.
7 Select the Heating
8 Let all heaters burn for at least 20 s.
▷ The required gas pressure on the burner depends
on the heating value/Wobbe index.
9 Select the required gas pressure on the burner
from the tables:
Natural gas, LPG
Heating
Gas type
value
Natural gas L G 25
32.49
Natural gas H G 20
37.78
LPG G 30
125.81
+ -
-
+
p
G
must be meas-
G
+ -
.
G
p
-
G
+ -
+
-
+
0
p
G
operating mode.
Wobbe
[mbar]
index
[MJ/m
3
]
41.53
13.5
50.71
9.5
87.34
19.5
13.09.20 19:58
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