K Control panel

2.3 Operating principle
Boiler regulation
Boiler regulation may be performed:
- either by the boiler thermostats,
- or by the SV-matic weather compensator, if any
(optional),
- or by the DIEMATIC-m Delta control panel in case of
a cascaded installation.
If the boiler is fitted with a SV-matic weather compensator
or is controlled by a DIEMATIC-m Delta control
panel, the boiler temperature is modulated by the
regulator acting on the burner according to the outside
temperature. In this case, the boiler thermostats are set
to the maximum position. Operating safety is provided
by the safety thermostat with manual reset.
If the boiler is fitted with a SV-matic weather compensator
controlling a valve, the heating temperature is
modulated by the regulator acting on the burner and on
the motorised mixing valve according to the outside
temperature.
For a cascaded installation controlled by a boiler fitted
with a DIEMATIC-m Delta control panel, refer to the
instructions supplied with the DIEMATIC-m Delta control
panel.
5
Domestic hot water regulation
With the optional MB2 domestic hot water priority
module or the Type B SV-matic weather compensator:
When the domestic hot water is being reheated, the
burner and the load pump are started while the
heating pump is stopped. The boiler temperature is
then regulated by the limiter thermostat integrated in
the MB2 module or in the SV-matic weather compensator.
Once the need for hot water is met, the burner is
turned off. The load pump continues operating for 4
minutes after the burner stops (This delay is adjustable
from 30 sec to 15 min). This allows using the residual
heat accumulated in the heating elements and complete
heating the tank, especially in summer.
For a cascaded installation controlled by a boiler fitted
with a DIEMATIC-m Delta control panel, refer to the
instructions supplied with the DIEMATIC-m Delta control
panel.