Viessmann Vitomax HS M73 Operating And Service Instructions page 55

Recommendations for operation, maintenance and testing in accordance with EN 12953-6
Checklist for boiler system: Steam boiler
Key
O = Monitoring, check for unusual noises, odours, smells, other unusual phenomena
■
■ T = Function check on equipment components, including monitoring
Operation, maintenance and inspec-
tions/tests:
Safety equipment against excessive
pressure (safety valves)
Water level indicator
Blow down and drainage devices
Valves
Feedwater control
Low water level protection (LWL)
Steam pressure and temperature indica-
tor (pressure gauge)
Pressure limiter
Temperature limiter
Circulation limiter
Devices for protecting the water quality
Protection systems
Pressurised parts (pipes, inspection
ports, flanges, gaskets, connections, etc.)
Pressure and temperature controllers
Feedwater supply
Water quality
Heat supply
Tab. 27
72 Months
hrs
1 3 6 12
O T
T
T
O T
O T
O T
O
O T
O T
O T
O T T
(1st (2n
) d)
O T
O
O T
O T
T
O T
Type of tests (examples)
Vent. Other function checks and monitor-
ing in accordance with national regula-
tions are possible.
Blow through only with boilers at p < 32
bar
By activation
In accordance with manufacturer's speci-
fications
Function check by reducing the water
level down to the switching points
Comparison with limiters and controllers
Function check by increasing the pres-
sure up to the switching points
Change in set value/test keys
1. Comparison of measured values to re-
liable samples
2. Checking by a qualified specialist
Electrical and mechanical checks by a
qualified specialist
Check for tightness
Comparison
To specifications of EN 12953-10
Carried out by a suitably qualified spe-
cialist at least once per year, in line with
the manufacturer's operating manual
Checklist
55