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4. Installation
4.6 Water connections
4.6.1. Flushing the system
The installation must be cleaned and flushed according
to good installation practices such as CSA B214.
The warranty may become null and void if the
installation is not flushed and/or the water quality is
inadequate.
It is mandatory to check the water quality of a central
heating installation semi-annually, particularly if it is
topped up regularly. If the water has been treated, the
supplier of the water treatment product can be
consulted. The user of the installation is responsible for
ensuring good quality installation water at all
times. If the user wishes to achieve this water quality
with the aid of water treatment systems, this will
also be his/her responsibility.
We would advise the user to record all water
treatments carried out in a good log book. This log
book can also be used to record work started and
performed on the central heating boiler(s) and system.
CAUTION
Consult water quality manual and have the system/
boiler water quality checked.
WARNING
Do not use petroleum-based cleaning or sealing
compounds in boiler system. Damage to elastomer
seals and gaskets in system could occur, resulting in
subtantial property damage.
Before filling the boiler and system with water, verify
the following. DO NOT fill with softened water. Boiler
corrosion can occur.
Installing the boiler in new installations
(installations less than 6 months old)
In the case of new installations, it is first of all crucial
to flush the entire installation thoroughly (without
the central heating boiler) before the central heating
installation is commissioned. This will remove
residues from the installation process (weld slag, fitting
products etc.) and preservatives (including
mineral oil). To assist in the flushing process, a cleaning
agent may be used (this may only be
performed by an appropriate expert). Do not soften
water to below 1ºf (0.1 mmol/l Ca(HCO3)2), as
softened water with lower water hardness is bad for the
installation. An inhibitor must be used in
combination with softening.
•
Clean the installation with a universal cleaner to
remove debris (copper, hemp, flux).
•
Thoroughly flush the installation until the water
runs clear and shows no impurities.
MCA-Pro ISM Rv.4.1 2/2017
Installing the boiler in existing installations
If the quality of the heating water in an existing
installation proves to be inadequate, certain measures
must be taken.
One option for removing pollution is to install a filter.
Various kinds of filters are available for this. A screen
filter is designed to trap large dirt particles. This filter
is usually placed in the full flow part of the system.
A fabric filter, on the other hand, is designed to trap
finer particles. This kind of filter is installed in partial
flow conditions, with an additional pump to control
circulation over the filter. Another option for removing
dirt is to flush the entire installation thoroughly. If a
new boiler is being installed in an existing installation,
the system must be flushed before the new boiler
is installed. The installation should be flushed by an
expert; this process involves risk if not performed
carefully. Loose dirt can only be removed where there
is sufficient flow. Treatment will therefore take place
section by section. Complications can occur if it is not
possible to ensure that the sections to be cleaned have
sufficient circulation and that user influences before
and during cleaning can be kept under control. Special
attention must also be paid to 'blind spots', where there
is only a small amount of flow and a lot of dirt can
accumulate. The above points are even more important
to note when flushing using chemicals. In particular,
there is the possibility of chemicals being left behind,
with obvious negative consequences. If the boiler is
polluted with dirt or scale deposits, it may be necessary
to clean the central heating boiler. Lime scale deposit
occurs by far most frequently at the hottest place in the
installation, i.e. in the central heating boiler. The central
heating boiler must be cleaned by an expert, using a
suitable agent.
•
Remove sludge from the installation.
•
Flush the installation.
•
Clean the installation with a universal cleaner to
remove debris (copper, hemp, flux).
•
Thoroughly flush the installation until the water
runs clear and shows no impurities.
If a water treatment product is used, the product must
have been found suitable for all materials used in the
central heating installation. The supplier of the water
treatment product must be consulted in this regard.
It is always important to adhere very closely to the
regulations and instructions provided by the supplier of
the water treatment product. This includes a periodic
inspection and periodic replacement if necessary.
Given that a variety of water treatment products are
available, it is not feasible for De Dietrich to investigate
all possible products. A number of well-known
manufacturers and their products are:
MCA Pro 45/65/90/115
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