Checking The Co Level; Preparing The Test; Test At The Upper Heating Input - Viessmann Vitocrossal 200 CM2 186 Service Instruction

Commissioning, Inspection and 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
16
Vitocrossal 200 CM2 186 to 311 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
186 8.5 - 9.5
246 8.5 - 9.5
311 8.5 - 9.5
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
gas)
4. Record the actual value in the report (on page 64).
content in % @ Hi-Fire
2
LPG
10.0 - 11.0
10.0 - 11.0
10.0 - 11.0
level falls within the
2
level falls (less gas)
2
level rises (more
2