Installing the boiler
7
Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.
33
7.5.5 Connecting the DHW cylinder
B
Connect the DHW cylinder return to connection RS.
B
Connect the DHW cylinder flow to either the VS1 or
VS2. At the factory, connection VS1 is intended for
the horizontal L/LT cylinders. In case of an adjacent
ST/SU cylinder, use the VS1 connection for cylinder
to the right of the boiler (viewed from the front). When
siting the cylinder to the left, use the VS2 connection.
B
Seal the superfluous VS connection with plug R1.
7.5.6 Conversion of the factory-fitted extension
from VS1 to VS2
B
Flip up the upper rear cover and the upper thermal in-
sulation from the heat exchanger.
B
Undo the extension with an open-ended spanner,
then turn it into the VS2 connection with an O-ring
and tighten.
.
B
Seal VS1 connection with plug R1.
B
Refit the thermal insulation and cover.
7.5.7 Installing the boiler drain & fill valve
(accessory)
B
Fit the boiler drain & fill valve together with gasket to
connection EL.
Fig. 28
Connecting the DHW cylinder
VS2
RS
VS1
VSL
USER INFORMATION
Ensure the O-ring is not damaged whilst
securing the extension.
Fig. 29
Installing the boiler drain & fill valve
1
BDF valve with reducer (optional accessory);
alternative BDF valve ½
2
O-ring
3
Reducer 1x½
EL
1
2
3
USER INFORMATION
For boiler / cylinder combination with
Logalux LT300
The GB125/18 boiler corresponds to boiler
size 28 in the pipe connection installation
instructions, and GB125-30/35 boiler cor-
responds to boiler size 24 in the same in-
structions.
