Buderus Logamax plus GB162 Technical Manual page 59

2. Underfloor heating system not directly
downstream
Where a higher output is to be transferred, an underfloor
heating system not directly downstream is required. This
circuit requires a low loss header with flow temperature
sensor and a secondary pump for the heating circuit
( fig. 50).
Logamax plus
GB162
FA
230 V AC
SU
50 Hz
EMS-BUS
BC10
VS RS MAG
RK
VK
VK SA
SMF
RK
Fig. 50 Example of an underfloor heating system not
directly downstream (index of abbreviations
page 52)
1)
Safety shut-off valve recommended (not required when
using with the GB162-50/65/80/100 and the pump
assembly)
2)
Additional RC25 programming unit feasible as a remote
control if the RC35 programming unit has been clipped
into the gas condensing boiler
3)
WM10 low loss header module may, alternatively, be
plugged into the gas condensing boiler
6 720 645 821 (2010/09) – Logamax plus GB162
2)
RC35
HK1
TWH
HS...(-E)
WM10
EMS-BUS
3)
EMS-BUS
230 V AC
KR
50 Hz
PH1
WH
1)
FK
6 720 642 463-37.1il
3. Underfloor heating system with system
separation
Provide system separation for underfloor heating systems
with pipes that are permeable to oxygen. The underfloor
heating circuit must be protected separately, downstream
of the heat exchanger, by means of a diaphragm
expansion vessel, safety valve and temperature limiter
( fig. 51). Size the heat exchanger in accordance with
the selected system temperatures. The pressure drop on
the primary side (boiler circuit) must be less than the
residual head of the heating circuit pump integrated into
the Logamax plus GB162.
Logamax plus
GB162
EMS-BUS
FA
230 V AC
SU 50 Hz
EMS-BUS
BC10
230 V AC
VS RS RK MAG
50 Hz
VK
2)
WT
SA
VK
VK
RK RK
Fig. 51 Example of an underfloor heating system with
system separation via a heat exchanger with
pipes that are permeable to oxygen (index of
abbreviations
1)
Overflow valve not required for variable speed pumps
2)
Safety shut-off valve recommended (not required when
using with the GB162-50/65/80/100 and the pump
assembly)
3)
Additional RC25 programming unit feasible as a remote
control if the RC35 programming unit has been clipped
into the gas condensing boiler
4)
WM10 low loss header module may, alternatively, be
plugged into the gas condensing boiler
5)
SMF recommended
System examples
3)
RC35
HK1
WM10
4)
1)
ÜV
PH1
SV
FK
TWH RH
VH
5)
SMF MAG
6 720 642 463-38.1il
page 52)
6
59