DOMUSA TEKNIK BIOCLASS HC, Инструкции по установке и эксплуатации для установщика, Страница: 39 / 72

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16.3 Low pressure lock-out
When this lock-out occurs,
“E19”
alarm code will appear on the digital display. The burner and the
boiler's circulation pumps will switch off, cutting off the heating and water flow to the installation.
This lock-out occurs when the pressure of boiler's water drops below the value set at
P.19
parameter of
"Technical menu"
(by default 0.5 bar), preventing the boiler from functioning when
the water is drained from the installation, due to either leakage or maintenance operations. To
unlock this alarm, fill the installation again
(see "Filling the installation")
up to 1 or 1.5 bar, displayed
on
"Water pressure"
parameter of
“User menu”
.
17 SHUTTING DOWN THE BOILER
Press
during 1 second to shut down the boiler. When the boiler is shut down the heating and DHW
services are switched off but anti-frost and pumps anti-lock functions continue activated whereas the
boiler is kept connected to the power supply and fuel installation.
Unplug the boiler from the power supply and cut out the fuel supply to shut down the boiler
completely.
18 EMPTYING THE BOILER
Use the drain cock located on the bottom of the backside of the boiler to empty it of water. Before
opening it, connect a flexible pipe leaded to a sewer. After finishing the procedure, close the cock and
remove de flexible pipe.