Check Ventinging System For Leaks (Circular Air Gap Measurement) For Sealed Combustion, Coaxial Venting Only - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Steps
(continued)
S
Start-up and Maintenance
ervice
A
B
Fig. 54
A Flue gas measurement port
B Combustion air measurement port
S
Maintenance
ervice
2.
Fig. 55
Initial Start-up, Inspection and Maintenance
11. 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.
12. Removing front panel
To ensure continued efficient operation of the boiler, it is recommended that it is
checked and serviced as necessary at regular intervals. The frequency of
servicing will depend on the particular installation conditions and usage but in
general once a year should be adequate. Any service work must be carried out
by a licensed professional heating contractor.
The boiler incorporates a flue gas measurement port. The flue gases can be
analyzed (if required). The push fit cap may be removed and a sample tube
installed. The push fit cap must be refitted after use. The flue gas sample will
enable the heating contractor to judge whether any adjustments are required.
Before commencing any service operation, isolate and secure the main power
supply against accidental reactivation, and turn off the main gas supply.
1.
2x
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 systems (non-sealed
combustion).
1. Loosen the screws at the bottom of
the boiler; do not remove
completely.
2. Remove the front panel.
values
2
55