Annual inspection and maintenance
dreizler A 3001 E - 18.12.2015 | A 2006 - 1.15 | EN - 10.12.2015
179
•
Cleaning of burner components
•
Cleaning of combustion chamber and heating surfaces
•
Replacement of wear parts
•
Setting of nominal capacity respectively partial load and check of the hygienic combustion behaviour
•
Final check of maintenance tasks completed by way of test measurements and documentation of re-
sults
56.6 Replacement of safety-relevant components
The heating industry has taken it upon itself to develop and produce products with high safety standards
and availability. The sector has therefore worked hard on the design and continued development of product
standards, applying decades of experience and industry knowledge. Product standards are seen as guide-
lines for product development and are often the basis for CE type testing procedures. The maintenance
requirements and instructions provided by the manufacturers are also of critical importance. Only where
these are diligently followed, can safety levels and high availability of products be maintained throughout
the lifespan of products.
Oil, gas, and dual fuel burners for heat and steam generation systems and their components are designed
for a specific period of time, in the following referred to as their
nominal lifespan
. The nominal lifespan is
expressed in switching cycles and/or time periods. These time periods are based on switching cycles com-
pleted during typical usage of an oil, gas, or dual fuel burner. Once the nominal lifespan of a safety-relevant
component has been reached, a check in accordance with manufacturer specifications and a preventative
replacement (where required) of the component is mandatory.
The following table provides an overview of min. requirements in terms of the nominal lifespan of various
safety-relevant components in oil and gas heating systems. The data provided is based on product stand-
ards, which can be used as basis for CE type testing procedures of the product. For more detailed infor-
mation on specific oil, gas, or dual fuel burners, and for safety-relevant components, see the inspection and
maintenance documents provided by the manufacturer. However, you can also contact the dreizler
®
team
directly with any questions you may have.
Tab. 56-1 Nominal lifespan of components in heat generators and burners
Safety-relevant component
Time (a)
Switching
cycles (-)
Standards
Tightness control
10
250.000
EN 1643
Pressure switch (gas)
10
50.000
EN 1854
Pressure switch (air)
10
250.000
EN 1854
Automatic firing sequence control
and monitoring equipment
10
250.000
EN 230 (oil)
EN 298 (gas)
Flame sensor (UV sensors)
Gas pressure regulators
Gas valves with tightness control
10000 operating
hours
15
following error
detection
n.a.
50000
EN 88
EN 12078
EN 1643
Gas valves without tightness control 10
250.000
EN 126
EN 161
Gas pressure switch MIN
Oil burner connection hoses
10
5
n.a.
n.a.
EN 1854
ISO 6806
Shut-off valves in oil supply line
10
250.000
EN 264
Overpressure safety valves
10
n.a.
EN 88
EN 14382
Fuel/air mixing systems
10
n.a.
EN 12067
