Viessmann VITODENS 200 Start-Up And Service Instructions page 18

Initial Start-up and Service
Steps
(continued)
I S
nitial start-up ervice
I S
nitial start-up ervice
I
nitial start-up
Combustion air measuring point
18
11. Check all primary and secondary circuit connections for leaks
12. Perform combustion analysis
IMPORTANT
A CO measurement (see page 16) must
be taken before and after working on gas
appliances to eliminate risks to health
and to guarantee the satisfactory condition
of the system.
Record the measured combustion
values in the sequence stated in the
Maintenance Record on page 70 in this
manual.
13. Check venting system for leaks (circular air gap measurement)
For sealed combustion, coaxial vent only.
Viessmann strongly recommends that
the heating contractor perform a
simplified leak test during boiler
start-up. For this purpose it is sufficient
to measure the CO concentration of
2
the combustion air in the coaxial gap of
the air intake pipe. The vent pipe is
considered sufficiently leak-proof if a
CO concentration in the combustion
2
air no higher than 0.2% or an O
concentration no lower than 20.6% is
measured.
Check heating system and domestic
hot water connections (if applicable).
Ensure all connections are pressure
tight.
Correct any leaks found on fittings,
pumps, valves, etc.
If higher CO values or lower O
2
are measured, check venting system
thoroughly.
Please note!
The vent pipe adaptor comes with two
measurement ports, one for
combustion air intake measurement
and one for flue gas measurement.
2
Please note!
This test is not applicable for single -
wall venting system (non-sealed
combustion).
values
2