Buderus Logamax plus GB162 Technical Manual page 49

DHW heating via pump assembly with integral 3-way diverter valve for the Logamax plus GB162-50 and
GB162-65
The 3-way diverter valve can only be fitted to the l.h. side
of the pump connection assembly. The pump connection
assembly with 3-way valve kit is only suitable for Logamax
PZ
KR
EZ
EK
Fig. 41 Logamax plus GB162-50/65 with pump connection assembly and 3-way valve kit
AW DHW outlet
EK Cold water inlet
EZ DHW circulation inlet
FS Safety temperature sensor
GAS Gas connection
HK Heating circuit
KR Check valve
MAG Diaphragm expansion vessel
PZ DHW circulation pump
RK Boiler return
RS DHW cylinder return
SMF Dirt filter
SV Safety valve
THV Thermostatic valve
VK Boiler flow
VS DHW cylinder flow
1)
On site
6 720 645 821 (2010/09) – Logamax plus GB162
AW
VS
RS
plus GB162-50 and GB162-65, and cannot be used for
boiler sizes 80 kW and 100 kW, as the amount of water
transported by the integral pump is insufficient.
Logamax plus GB162-50/65
FS
SV
SMF
GAS
Δ p [mbar ]
900
800
700
600
500
400
300
200
100
0
0
Fig. 42 Residual head GB162-50/65 with pump
assembly and integral 3-way diverter valve
a Low load
b Full load
Δp
Pressure drop
V Flow rate
DHW heating
1)
MAG
THV
HK
VK
RK
6 720 642 463-29.1il
ΔT = 20 K = 50 kW
b
a
ΔT = 20 K = 65 kW
1000 2000 3000
6 720 642 463-30.1il
5
4000
V [m
3
/h]
49