Resetting Operating Parameters To Their Delivered Condition; Manual Operation And Service Display - Viessmann VITOCROSSAL CRU 800 kW Service Instructions Manual

Burner control unit VUC 310
Sub-menu Parameter
point
9 Boiler controller start hysteresis (effec-
tive during minimum pause)
A Boiler controller stop hysteresis (effec-
tive during minimum pause)
0 Reset all operating parameters to their
delivered condition.
Example: To set the maximum operational output of
the burner to between 70 and 100 %, press the follow-
ing keys:
1. S longer than 2 s, " " flashes.
2. until "6" is shown under Service.
3. S "6" is displayed under Status.

Resetting operating parameters to their delivered condition

1. S longer than 2 s, " " flashes.
2. until "6" is shown under Service.
3. S "6" is displayed under Status.
4. until "0" is shown under Service.

Manual operation and service display

To call up the service display and for manual operation
the burner must be running. The service display shows
the current modulation level in %.
Press the following keys:
1. /S simultaneously for longer than 2 s.
The burner changes to manual mode and a
"P" will be shown under Status. The current
modulation level will flash under Service.
(cont.)
Setting range/unit
0 to 20 K
0 to 20 K
4. S
5. /
6. S
7. S
5. S "1" is shown under Status and "dEL" under Serv-
6. S to confirm. If reset successfully, "1" is shown
7. S to change to the operating display.
2.
3.
4. /S simultaneously for longer than 2 s.
Delivered condition
6 K
6 K
"1" is displayed under Status. The current value
for the maximum operational output in % is
shown under Service.
for required maximum operational output.
to confirm. If adopted successfully, "1" appears
under Service; if it failed, "0" will appear.
to change to the operating display.
ice.
under Service; if it failed, "0" is shown.
for the lower heating output, until "0" is shown
under Service.
for the upper heating output, until "100" is
shown under Service.
The burner returns to modulating mode.
Burner control unit
35