Checking The Operating Pressure; Topping Up Heating Water And Bleeding The System - Buderus Logano plus GB312 Operating Instructions Manual

3.4.2 Checking the operating pressure

Your heating contractor has set the red needle of the
pressure gauge to the required operating pressure (at
least 1 bar).
You can check the design operating pressure for this
heating system on page 2.
Check whether the pressure gauge needle is within
the green field.
If the pressure gauge needle falls below the green
field, top up the heating water.
3.4.3 Topping up heating water and bleeding the
system
Ask your heating contractor to show you where the boil-
er fill & drain valve for topping up the heating water is lo-
cated on your heating system
RISK TO HEALTH
from contamination of drinking water.
CAUTION!
Ask your heating contractor to show
you how to fill your heating system with
water.
Always observe the regulations and
standards applicable in your country
for the prevention of contamination of
drinking water (e.g. by water from
heating systems). In Europe, observe
standard EN1717.
SYSTEM DAMAGE
through temperature stresses.
CAUTION!
Temperature stresses can cause cracks if
you fill your heating system when it is hot.
The boiler will leak.
Only fill the heating system when it is
cold (the flow temperature should be
no more than 40 °C).
Fill the heating system slowly via the filling valve (pre-
existing or fitted by customer). Watch the display
(pressure gauge) as you do so.
Once the desired operating pressure is reached, stop
the procedure.
Bleed the heating system via the bleed valves on the
radiators.
Top up with water if the pressure drops as a result of
bleeding the system.
Logano plus GB312 gas-fired condensing boiler
Fig. 6
1 Red needle
2 Pressure gauge needle
3 Green field
-
Technical specifications are subject to change without prior notice.
Operating the heating system
2
1
Pressure gauge for sealed systems
3
3
9