Checking The Co Level; Preparing The Test; Co Test At The Upper Heating Input - Viessmann Vitocrossal 200 CM2 400 Service Instructions Manual

Commissioning, Inspection, Maintenance
Steps – Commissioning, Inspection and Maintenance
Checking the CO level
2

Preparing the test

1. Open the gas shut-off valve.
2. Start the burner with the emissions test switch enabled
at the boiler control unit.
3. At the same time, press button S F and button
G and hold for longer than 2 seconds.
B
The display will then show the following:
■ Under Status A: "P" (= relay test)
■ Under Service B: Modulation level in %
"100" = 100% = upper heating input,
"0" = 0% = lower heating input
18
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Service
(continued)
CO Test at the upper heating input
2
1. Press button E until the service display B has
Y
incremented to "100"(= 100%).
2. Check the CO level at the flue pipe.
2
Boiler Model Permissible CO
NG
400
8.9  0.2
500
8.9  0.2
620
8.9  0.2
620 TX
8.9  0.2
3. If the CO level must be adjusted:
2
■ Remove cap B.
■ Turn adjusting screw A in small increments
(3 mm Allen key) until the CO
specified range:
- Turning clockwise → CO
- Turning counter-clockwise → CO
(more gas)
4. Record the actual value in the report (on page 61).
content in % @ Hi-Fire
2
LPG
10.6  0.2
10.6  0.2
10.6  0.2
10.6  0.2
level falls within the
2
level falls (less gas)
2
level rises
2