Checking The High Limit Safety Cut-Out Setting; Filling The Heating System With Water And Venting; Filling The Trap With Water; Opening The Boiler - Viessmann VITOCROSSAL 200 CM2 Service Instructions For Contractors

Commissioning, inspection, maintenance

Checking the high limit safety cut-out setting

The high limit safety cut-out is preset to 110 °C and, if
required, can only be adjusted by changing the coding
card.

Filling the heating system with water and venting

Record the volume filled, water hardness and pH value
on page 62.

Filling the trap with water

Fig. 2

Opening the boiler

10
Note
Observe the "Water quality requirements" on
page 64.
1. Undo 4 screws. Remove the centre and bottom
back panels.
2. Undo the siphon and fill with water so that no flue
gas can escape.
Danger
Flue gas escaping from the trap or conden-
sate drain can cause life threatening carbon
monoxide poisoning. To prevent flue gas
from escaping, always connect the conden-
sate drain with a trap. Always fill the trap
with water before commissioning.
3. Check that the condensate can drain freely.
4. Refit the trap.
Note
The hose connection to the on-site condensate
system or to the neutralising system must not be
permitted to sag. Support the hose connection with
pipe if necessary.
1. Switch OFF the mains isolator or the power supply,
and safeguard against unauthorised reconnection.
Danger
Mains voltage can be life threatening.
For maintenance work, isolate the system
from the power supply.