Viessmann VITODENS 100-W Installation And Service Instructions Manual page 42

Start-up, Inspection and Maintenance
Overview of Controls and Indicators
A B
..:.. ..:.. ..:.. ..:..
8 8 8
r
A
H G F
Fig. 42
42
D
C
ºF
SERV
E
(continued)
Legend
A Heating mode pump output "ON"
(when RT is closed)
B DHW mode pump output "ON"
(when DHW is closed)
C Boiler water temperature in °F or
fault code
D Units for boiler water temperature
measurement
E Service mode
F Current burner firing power rate
G Burner in operation indicator
H Fault indicator