Water Treatment And Connections - DeDietrich MCR 24 Technical Instructions

1 Water treatment and connections

Fill the heating system only with non-treated drinking water (pH
between 6 and 9). If you require more information on specific
subjects, do not hesitate to contact our technical department.
If used correctly water treatment can improve the boilers efficiency
and increase the anticipated life expectancy of the boiler.
As most systems contain a variety of metals, it is considered good
practice to provide some frome of water treatment in order to prevent
or reduce the following (metallic corrosion, formation of scale and
sludge, microbiological contamination, chemical changes in the
untreated system water.
Suitable chemicals and their use should be discussed with a
specialist water treatment company prio to carrying out any work
(environmantal aspects, health aspects). Specification, age and state
of the installation, as well as manufacturer recommendations must be
considered. Think of cleaning old water installations to remove any
corrosive residue, especially black iron oxide sludge.
The boiler must not operate if chemical products are used
for cleaning.
1.1 Fitting the mounting frame
Refer to the assembly instructions supplied with the mounting
frame package.
1.2 Positioning the boiler
See "Installation instructions"
1.3 Filling the siphon
Operation while the condensation water siphon is empty
may damage the boiler. There is a danger that combustion
08/06/06 - 300008460-001-B
The exchanger will have to be descaled, if need be, in order to
maintain optimum performance.
It is especially important to check the concentration of inhibitors after
installing them, make the necessary modifications to the installation,
inject water in the installation and perform all maintenance operations
conform to these instructions.
To know the suitable dosage as well as which inhibitors to use with
your boiler and to acquire further information on water processing or
cleaning of the installation contact the technical service directly.
The MCR boiler is equipped with a system protection against low
flows that depends on temperature reading. By reducing boiler power
as soon as there is a risk of insufficient flow, the boiler can continue
operating. However, if the temperature difference between the out
and return heating is greater than 45 °C or if the rise in heating outlet
temperature is greater than 1 °C/second, the boiler cuts for 10
minutes before authorizing start-up again. If there is no water in the
boiler or if the pump is not operating, the boiler shuts itself down
(code E7) and needs to be restarted manually.
products will overflow into the waste water discharge
network.
To do this, fill the siphon with water via the combustion products
discharge conduit until it overflows.
MCR 24, 24/28 MI, 30/35 MI, 34/39 MI
Minimum water flow
19