Checking The Ventilation Air Apertures In The Installation Room; Checking The External Lpg Safety Valve (If Installed) - Viessmann Vitocrossal 100 Series Service Instructions For Contractors

Checking the combustion quality
A
Fig. 20
01. Connect a flue gas analyser at flue gas port
the boiler flue connection.
02. Open the gas shut-off valve, start the boiler and
create a heat demand.
Select higher/lower heating output
Weather-compensated control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
å
2. "Actuator test"
3. Select the lower heating output:
Select "Base load OFF". Then "Base load ON" ap-
pears and the burner operates at its lower heating
output.
4. Select the upper heating output:
Select "Full load OFF". Then "Full load ON" ap-
pears and the burner operates at its upper heating
output.
5. Ending output selection:
Press .
ä
Checking the ventilation air apertures in the installation room (only for
open flue operation)

Checking the external LPG safety valve (if installed)

Commissioning, inspection, maintenance
(cont.)
03. Adjust the lower heating output.
04. Check the lower heating output.
05. Check the CO
ates from the aforementioned ranges by more
than 1 %, check the ionisation electrode and con-
necting cable. See section "CO
06. Enter the actual value into the report.
07. Set the upper heating output (see page 27).
08. Check the CO
ates from the aforementioned ranges by more
than 1 %, check the ionisation electrode and con-
necting cable. See section "CO
09. After testing, press OK.
on
A
10. Enter the actual value into the report.
Constant temperature control unit
Service menu
1. Press OK and
2. Select " " with
The display shows "I" and "ON" flashes.
3. Select the lower heating output:
Press OK, "ON" will be displayed constantly.
4. Select the upper heating output:
Press .
ä
5. Select "2" with
6. Press OK, "ON" will be displayed constantly.
7. Ending output selection:
Press .
ä
content. If the actual value devi-
2
or O
2 2
content. If the actual value devi-
2
or O
2 2
simultaneously for approx. 4 s.
å
and confirm with OK.
Ú
; "ON" flashes.
Ú
content".
content".
27