Check Venting System For Leaks; Removing The Front Panel - Viessmann Vitodens 100-W B1HA 26Vitodens 100-W B1HA 35Vitodens 100-W B1KA 35 Installation And Service Instructions Manual

Start-up, Inspection and Maintenance
Check Venting System for Leaks (circular air gap measurement)
Legend
A Flue gas measurement port

Removing the Front Panel

48
Vitodens 100-W, B1HA series & B1KA 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 concentration of the combustion air in the coaxial
2
gap of the air intake pipe. The vent pipe is considered
sufficiently leak-proof if a CO
combustion air no higher than 0.2% or an O
no lower than 20.6% is measured.
If higher CO values or lower O
2
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).
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.
concentration in the
2
concentration
2
values are measured,
2