Taking The Boiler Out Of Operation; Boiler With Frost Protection, Out Of Operation For A Long Time; Boiler Without Frost Protection, Out Of Operation For A Long Time - DeDietrich C230 ECO-A 120 Installation, Operating And Service Manual

9 Commissioning
Fig. 29 Check size and positioning of
restrictor
9.3

Taking the boiler out of operation

60
If the CO % with the 230-80 and 230-120 still deviates on full load:
2

adjust part load (see point 15.c and 15.d)

check full load (see point 15.b) ; if the CO
large;

check the size and placing of the restrictor (natural gas; 8.4 mm)
The following operating modes are now available:
Modulating operation: The heat output of the boiler
23.a
modulates on the basis of the flow temperature demanded by
the modulating controller, see 'Note' in point 22 and Section
8.1.2.
On/off operation: the boiler modulates between minimum
23.b
and maximum heat output on the basis of the flow
temperature set in the boiler, see Section 7.3.2.
The boiler must be switched off for maintenance or repair work. If the
central heating system is not going to be used for a long time (for
example, during holidays in frost-free periods), it is advisable to put
the boiler out of operation.
9.3.1 Boiler with frost protection, out of operation
for a long time

Set the controller low, for example to 50°F (10°C);
The C230 ECO-A will now only come into operation to protect itself
against freezing, (= depending on parameter 33, see Table 13).
To prevent radiators and the system from freezing in rooms where
there is a risk of frost (e.g. garage or storage room), a frost thermostat
can be connected to the boiler. The boiler will then keep the radiators
in that room warm.
This frost protection does not work if the boiler is out of operation.
9.3.2 Boiler without frost protection, out of
operation for a long time

Isolate the mains power supply from the boiler;

Close the boiler gas cock.
C230 ECO-A
% deviation is still too
2