Shutting Down The Heating System; Via The Control Unit; In Emergencies; Checking The Operating Pressure, Topping Up The Heating Water And Venting The System - Buderus Logano plus GB402 Operating Instructions Manual

4
Operating the heating system
4.2

Shutting down the heating system

NOTICE: System damage due to frost!
When the heating system is switched off, the
system water can freeze up.
B In case of a risk from frost, protect the
heating system against frost damage. To
do so, drain the heating water at the
lowest point of the heating system. Do this
by opening the air vent valve at the highest
point in the heating system.
4.2.1 Shutting down the heating system via the
control unit
Shut down the heating system via Logamatic BC10 base
controller. Switching off the Logamatic BC10 base
controller also automatically shuts down the burner.
B Shut down the heating system at the ON/OFF switch
of the BC10 (position "0").
B Close the main fuel shut-off valve.
Fig. 9 Logamatic BC10 basic controller
4.2.2 Shutting down the heating system in
emergencies
Only in emergencies, switch off the heating
system via the installation room fuse/circuit
breaker or the heating system emergency
stop switch.
Explain to the customer what to do in an emergency,
e.g. a fire.
B Never risk your own life. Your own safety is paramount.
B Close the main fuel shut-off valve.
B Isolate the heating system from the mains power
supply by means of the heating system emergency
stop switch or the appropriate domestic fuse/circuit
breaker.
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4.3 Checking the operating pressure,
topping up the heating water and
venting the system
The water with which the heating system is first filled
decreases substantially in volume in the first few days due
to the release of gas. This causes air pockets to form and
the heating water starts to make noises.
B With new heating systems, check the operating
pressure daily at first, topping up the heating water and
bleeding the radiators if required.
B Later on, check the operating pressure monthly,
topping up heating water and venting the boiler and
radiators if needed.
4.3.1 Checking the operating pressure
Your heating contractor will have set the red needle of
pressure gauge [1] to the required operating pressure
(at least 1 bar) and will have recorded this value in tab. 7,
page 15.
B Check that pressure gauge needle [2] is inside the
green band [3].
B If the pressure gauge needle drops below the green
band, top up the heating water.
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1
Fig. 10 Pressure gauge for sealed unvented systems
1 Red needle
2 Manometer needle
3 Green band
Logano plus GB402 - Subject to technical modifications.
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6 720 615 876-59.1RS