Viessmann Cascade control unit Installation, Operating And Service Instructions page 30

Functions
Safety and monitoring equipment
Pump protection control
Preconditions: "Pump protection Yes" must be configured (see page 13).
Daily between 12:00 and 12:05 hrs., the pump will be started to prevent it
from seizing up.
Hours run and start-up counter
The hours run and start-up counters store the number of hours run and the
number of start-ups of the boilers and distributor pumps (if installed), which
are regulated by the control unit.
Hours run/start-ups (multi-boiler control unit)
Boiler 1
12h
Pump
112h
Boiler 1
From: 02 05 2002
Every counter can be reset individually, if "Hours run counter reset" was
configured (see page 13).
Hours run/start-ups (multi-boiler control unit)
Boiler 1
clear?
30
Boiler 1 has run for 12 hours and was started
eight times.
8S
The distributor pump has run for 112 hours in all
and was started sixteen times.
16S
The counter of boiler 1 was started on 02.05.2002.
Select counter and then double click
resets the counter, and the current date
becomes the start date for further counts.
(cont.)
.