Buderus Logamax plus GB142-24 Servicing Instructions page 19

page 16, page 18
The "Heat request" LED is lit.
0
The blower is started up.
The hot surface ignitor is activated for
seven seconds.
The circulation pump is started up.
0
Ignition phase:
The gas valve is opened.
The GB142 enters heating mode.
The "Burner" LED is lit.
temperature in the hot water
at least 9 °F (5 K) lower than the temperature
set on the BC10 or RC?
room or outdoor temperature-
dependent regulator in the request
position?
The "Heat request" LED goes off.
0
The gas valve is closed,
the burner is shut down.
The "Burner" LED goes off.
Start of pump post purge time via the heating
system. Pump post purge time in line with
"Settings" menu. See page 12 and page 20.
Factory default setting: 5 minutes.
Air-side after-purging by blower for
30 seconds.
The primary circulation pump stops.
The blower stops.
page 16
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
6
C
L
H
Is the
yes
no
Is the
yes
no
H
5
no
7
page 17
Is
the supply
temperature
11 °F (6 K) higher than
the target value? (The target value
is calculated by the outdoor
temperature-dependent regulator
or is set - in the event of room
temperature-dependent
regulation- on the
BC10)
Yes
0 Y
The gas valve is closed,
the burner is shut down.
The "Burner" LED goes off.
The blower stops.
Is
the supply
no
temperature 11 °F (6 K)
lower than the
target value?
Function
yes
5
19