System Example For The Logamax Plus; Heating Via 3-Way Diverter Valve - Buderus Logamax plus GB162 Technical Manual

6 System examples
6.3.4 System example for the Logamax plus GB162-15/25 with low loss header, one heating
circuit without mixer, one underfloor heating circuit with mixer and separate DHW heating via 3-way
diverter valve
AW
EK
FW
Fig. 68 Circuit diagram for the system example (index of abbreviations
1)
Distributor with integral low loss header, up to 2000 l/h
The circuit diagram is only a schematic
illustration.
Information regarding all system examples
page 52 ff.
Brief description
• Control of the low loss header (separation) and one
heating circuit without mixer (HK1) via WM10 low loss
header module.
• Control of one underfloor heating circuit with mixer
(HK2) via MM10 mixer module.
• Both heating circuits can be controlled in
weather-compensated mode, room
temperature-dependent mode or
weather-compensated mode with room temperature
hook-up.
• Output-dependent operation of the heating circuit
pump; adjustment at the RC35 programming unit
(setting 0).
• Separate DHW heating with the Logamax plus GB162
via a 3-way diverter valve on the primary side of the
hydraulic separation.
70
PZ
FS
SV
2
2x0,6
2
3x1,5
SU
230 V AC
50 Hz
BC10
2
2x0,6
BUS
MAG
VS RS
EZ
AW
SMF
BUS
RC35
2
2x0,6
(RC25)
THV
HK1
FA
WM10
BUS
2
3x1,5
KR
230 V AC
50 Hz
PH1
VK VK
RH VH
(HS...)
RK RK
RK
SA
Special design information
• Optional DHW heating via an individual time channel
including actuating a DHW circulation pump and
thermal disinfection.
• Generally, DHW heating takes priority (via the 3-way
diverter valve either cylinder heating or heating mode)
because of the selection of the DHW output at the
RC35 programming unit.
• An individual time channel is feasible for DHW heating
in combination with the RC35.
• Size the flow and return lines to the low loss header for
maximum boiler output.
• The distributor with integral low loss header is suitable
for up to 2000 l/h. Using this distributor above 25 kW
would therefore be inappropriate.
6 720 645 821 (2010/09) – Logamax plus GB162
RC25
(RC35)
2
2x0,6
HK2
TWH
MM10
BUS
FV2
2
3x1,5
KR
230 V AC
PH2
50 Hz
SH2
(HSM...)
HKV 2/25/25 WHY
FK
VK
6 720 642 463-53.1il
page 52)
1)