Viessmann Vitomax HS M73 Operating And Service Instructions page 34

Commissioning, inspection, maintenance
Commissioning the system
Operating instructions for burner and accesso-
ries
01. Check that the fuel being used is permissible for
the current system configuration.
02. Open the boiler door/doors.
03. Insert the turbulators into the hot gas flues as far
as they will go.
04. Close the boiler door(s).
05. Check that the inspection ports at the back of the
boiler are closed.
06. Open the installation room vents.
07. Check the function of the water treatment system.
08. Fill the steam boiler with treated water to above
the low water indicator level.
Note
Only use water that is suitable for the steam boiler
(EN 12953-10). See "Standard values for water
quality" from page 19 onwards.
09. Check all fitted components (pipework, valves,
controllers, pumps etc.) for function and tightness.
10. Check the fuel supply pressure and tightness.
11. Open the flue gas damper (if installed).
12. Open the shut-off valves in the gas or oil line.
13. Start the system in the following order:
1. Mains isolator
2. Switches for all the equipment required for
operating the boiler system
3. ON/OFF switch for the burner
Note
Observe the burner manufacturer's operating
instructions
14. Start the boiler at max. 30
ing output and heat up to a pressure of 20
below operating pressure.
Version with integral ECO
Manually activate the blow-down valve to repeat-
edly initiate a feedwater flow through the ECO.
This will prevent steam hammer during heat-up.
34
of combustion heat-
%
%
15. Vent the boiler at the air vent valve during heat-up
until steam is expelled. Then close the valve.
Note
If no air vent valve is included as part of standard
delivery, vent the boiler via the safety valve during
heat-up. When doing so, observe the relevant
safety regulations.
Danger
Hot air/steam can cause severe burns.
Discharge hot air/steam safely. Observe
safety regulations.
16. Slowly open the steam valve after the required
steam pressure has been reached, otherwise
there is a risk of steam hammer.
17. While the system heats up, check the correct func-
tion of all control and safety equipment.
18. Observe the pressure and temperature test equip-
ment.
19. If required, drain and vent the connection lines.
20. Check the closures for tightness and tighten if
required.
Tighten all closures when the permissible operat-
ing pressure has been reached.
21. After approx. 50 hours run, check the boiler
door(s) for tightness. Tighten fittings if required.
Torque values under cold and hot conditions
Lock Dimensions
Handhole 100 x 150 mm, M16 100 Nm
Headhole 220 x 320 mm, M20 200 Nm
Manhole 320 x 420 mm, M24 350 Nm
Inspection M10/M12
port
Fitting, boiler M12
door(s)
Tab. 19
Torque
20 Nm
20 Nm