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5784 568 - 13
Vitodens 100-W, B1HA/B1KA 26 to 125 Combi Installation/Service
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
2
concentration of the combustion air in the coaxial
gap of the air intake pipe. The vent pipe is considered
sufficiently leak-proof if a CO
2
concentration in the
combustion air no higher than 0.2% or an O
2
concentration
no lower than 20.6% is measured.
If higher CO
2
values or lower O
2
values are measured,
check venting system thoroughly.
Note:
The vent pipe adaptor comes with two measurement
ports, one for combustion air intake measurement
and one for flue gas measurement.
Note:
This test is not applicable for single-wall venting
systems (non-sealed combustion).
Legend
A
Flue gas measurement port
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. Loosen retaining screws, screws are captive and do
not need to be fully removed.
2. Remove the front panel.
Check Venting System for Leaks (circular air gap measurement)
Removing the Front Panel
Start-up, Inspection and Maintenance
