Bosch Buderus SB625WS, Installation Instructions Manual, Page: 50 / 52

50 | Glossary
SB625WS/SB745WS 6 720 805 218 (2013/02)
Checks
As is the case with checks for water parameters, it is the responsibility of
the system operator to ensure that any water treatment systems are
functioning properly, in compliance with instructions and at the
specified intervals. The supplier’s responsibility ends with the supply
and commissioning of the right conditioning system for achieving and
maintaining the required water parameters.
Advice on sampling
In order to arrive at a correct analysis of the chemical and physical
characteristics of a water sample, sampling systems and methods must
be capable of guaranteeing precision and repeatability.
The sampling system must, in addition, not add further contaminants to
the sample.
For this reason it is preferable for the sampling system to be made from
the same material as the pipe or tank in which it is installed. If the
temperature of the water being sampled is hotter than 95 °F (35°C), a
cooling coil must also be provided to reduce its temperature to no more
than 77 °F (25°C). Before taking the sample of water for testing, bleed
the sampling system for 5 minutes to eliminate any oxides or other
materials in suspension that might have accumulated in it.
The sample container must likewise by made from an inert material
compatible with the sample collected (e.g. glass or polyethylene).
Wash any containers thoroughly in the water to be sampled before
actually taking the sample.
Ordinary analysis and checking, frequency and sampling points
The following symbols and terms are used to identify sampling
frequency and the location of sampling points:
The following table lists the sampling frequencies and sampling
locations for the various types of heating system.
Symbols and terms
Frequency of
analysis A - Twice a year, in the season in which the heating
system is in use
B - Once a month
C - Once every 15 days
D - Once a week
Sampling points 1 - Filling water
2 - Filling and/or refilling water
3 - Water in the boiler or heating circuit
Table 22
Type of system
analysis and checks Hot water
heating system Notes
Appearance 2A - 3A
pH 3A
Total hardness 2B
Fixed residue Electrical conductivity
measurement can be used
instead
Electrical
conductivity Fixed residue measurement
can be used instead
Iron 3A
P-alkalinity
Chemical conditioner 3A
Copper 3A
Table 23