Installing the boiler
7
Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.
31
Connection without heating circuit quick assembly system
In this case, install a non-return valve into the flow pipe.
B
Fit the return connector with inserted flat gasket to
connection RK/RS.
B
Fit an adaptor to the 90° outlet with flat gasket inser-
ted.
B
If no DHW cylinder is to be connected, fit locking cap
with inserted flat gasket to connection RS.
7.5.2 Connecting the heating flow and return
B
Connect heating return to connection RK.
B
Connect heating flow to connection VK.
7.5.3 Connecting the safety flow
We recommend connecting a boiler safety kit (accesso-
ry), safety valve, pressure gauge or air vent valve (ac-
cessory) to connection VSL.
Fig. 24
Fitting the return connector
1
Flat gasket
2
Tee
3
Locking cap
4
Reducer, G 1¼ to R 1, for existing pipework
RK/RS: Return connection G 1¼
RK: Boiler return R 1
RS: DHW cylinder return G 1
3
1
2
1
RS
RK/RS
RK
4
1
Fig. 25
Connecting the flow and return
RS
RK
RK/RS
VK
VSL
VS2
VS1
EL
USER INFORMATION
We recommend the on-site installation of a
dirt trap (accessory) into the central hea-
ting return to prevent contamination on the
water side.
VSL:
Flow safety line
VK:
Boiler flow
RK:
Boiler return
VS:
DHW cylinder flow
RS:
DHW cylinder return
EL:
Drain
Fig. 26
Connecting the air vent valve to the safety flow
(dimensions in mm)
VSL
SYSTEM DAMAGE
through the connection of incorrect com-
ponents to connection VSL.
B
Never connect a summer line, DHW cy-
linder or another heating circuit to the
VSL.
