Installation Manual
54
Further details regarding individual steps (cont.)
Venting the boiler
1. Close the shut-off valves on the heating
water side.
2. Connect the drain hose between top
valve and a drain outlet.
3. Open valves and and vent at
main pressure until no sound of escaping
air can be heard.
4. Close valves and and open the
heating water shut-off valves.
B
A
B
A
B
1. Close the gas shut-off valve and switch
ON the control unit.
Venting the heating system
5350 485 GB 08/2007
Vitoden 200-W pages 44 - 4/9/07 7:56 pm Page 11