Water Quality Requirements - Buderus Logano plus GB312 Applications Manual

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3 Water quality requirements

Poor water quality can damage heating systems due to
scale formation and corrosion.
About this chapter:
This operator's log contains important information regarding
the treatment of water for boilers containing aluminium
materials.
This document shows you how to keep a log of water
treatment. It explains with the aid of an example how to
make the necessary calculations and record the fi gures.
A record book table is included at the end of this chapter.
This operator's log is intended for the system user as well
as qualifi ed heating engineers, who – as a result of their
training and experience – are skilled in dealing with heating
systems.
Warranty claims in respect of GB312 boilers are
only valid in conjunction with the requirements
specifi ed herein and properly completed annual
service records in the operator's log and the
servicing and maintenance log.
3.1 Maintenance of user manual
In addition to the quantity of fi rst-fi ll and replenishment water
added to the system, you should also record its calcium
carbonate [CaCO3] concentration (hardness) in this log
book (See page 15).
Technical specifi cations are subject to change without prior notice
3.2 Prevention of damage by corrosion
Additional protection against corrosion
Corrosion damage occurs if oxygen constantly enters the
heating water due, for example, to:
–undersized expansion vessels
–faulty expansion vessels
–open-vented systems.
If the system cannot be constructed as a sealed system,
anti-corrosion measures such as system separation by
means of a heat exchanger are necessary.
USER NOTE
• If the appliance is installed in an existing
heating system, dirt may accumulate in the
boiler, leading to lo calized overheating,
corrosion and noise.
• Alway install a WYE-STRAINER in
existing heating systems.
Installing a dirt trap like an WYE-strainer and a desludging
device is required. This must be installed in the heating
system in the immediate vicinity of the boiler, in an easily
accessible position between the boiler and the lowest point
in the return of the system, and cleaned at every annual
service.
Fig. 7 WYE Strainer location
1 WYE Strainer
Logano plus GB312 applications manual | 04.2008
GB312 Applications Manual
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