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We reserve the right to make any changes due to technical modifications!
Installation, Operation and Maintenance Manual Sealed Combustion Gas Boiler Logano GA244 • Issue 02/2004
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
Placing the Boiler in Operation
11
11.5 Detailed Steps for Start-up Procedure
11.5.1 Taking flue gas measurements
z
Record all measurements on page 33.
z
Take sampling probe to the outside of the building.
Under no circumstances drill a hole in the venting
system!
z
Take all flue gas samples from this location.
z
Allow boiler to run for 5 minutes before taking
measurements.
11.5.2 Carbon dioxide content
z
If the carbon dioxide content is less than 5 % or more
than 9 % for natural gas or less than 6 % or more than
10 % for propane, check the setting of the air inlet
plate and the integrity of the complete venting system
(Fig. 18a).
11.5.3 Flue gas loss
Flue gas loss can be calculated with the following
formula:
Values for A and B are listed below:
Table. 13
Carbon monoxide content
The measured carbon monoxide content must be
converted according to the following formula to an air
free state and entered in the record. CO2 max for
natural gas is approx. 12 % (propane, approx. 14 %)
CO airless = CO2 max./CO2 measured x CO measured
In an airless state, CO measurements must be lower
than 400 ppm or .04 % volume. Measurements around
or greater than 200 ppm indicate an erroneous burner
setting, dirt in the gas burner or heat exchanger, or
defects in the burner.
z
The problem must be correctly immediately.
Inform the owner/operator and hand over the
technical documents.
Make the owner/operator familiar with the entire instal-
lation and the operation of the boiler. Sign the form with
the owner on page 35 and turn over the documents to
the owner (page 33).
CAUTION!
SYSTEM DANGER !
due to frost.
The heating system can freeze up if the
system is shut down for the winter.
z
Protect the heating installation from
freezing.
z
Drain water from the boiler, heating
system and hot water tank to prevent
freezing.
q
A
= ((t
A
– t
L
)
x
A) /CO
2
in %
q
A
= flue gas loss
t
A
= gross flue gas temperature in F
t
L
= ambient air temperature in F
A = see Table 12
CO
2
= carbon dioxide in %
A
Natural gas
0.62
Propane gas
0.53
