Viessmann Vitomax HS M73 Operating And Service Instructions page 40

Commissioning, inspection, maintenance
Checking the tightness of the inspection ports
A
C
C
Fig. 16
Caution - hot surface!
Inspection ports
A
Handhole
C
Note
If the optional thermal insulation is fitted, this must first be removed.
Checking the water level and system pressure
See page 12ff.
Checking the safety and control equipment
Checking the safety valve
Information on the safety valve
Checking the water quality
Document the top-up volume and overall hardness of
the boiler water.
Checking the thermal insulation
Checking the installation room ventilation
Checking the flue pipe for tightness
40
C E
Headhole
D
Manhole
E
See chapter "Standard values for water quality" on
page 19
(cont.)
D