Separate Dhw Heating Via A 3-Way Diverter Valve For The Logamax Plus Gb162-45, Gb162-50, Gb162-65, Gb162-80 And Gb162-100 - Buderus Logamax plus GB162 Technical Manual

5 DHW heating
5.4 Separate DHW heating via a 3-way diverter valve for the Logamax plus GB162-45,
GB162-50, GB162-65, GB162-80 and GB162-100
DHW priority circuit
The universal burner control unit UBA3.5 of the Logamax
plus GB162 gas condensing boilers features a DHW
priority circuit. This actuates a 3-way diverter valve.
This way, the heating circuit pump operates alternately as
heating circuit pump or cylinder primary pump. The 3-way
diverter valve is fitted on-site, outside the boiler.
Dimensions and specification of the external 3-way
diverter valves
GB162-45
94 68
90
1)
140 /
2)
147
A B
AB
1)
112 /
2)
116
Fig. 39 Dimensions of the external 3-way diverter
valves for the Logamax plus GB162-45 and
GB162-50/65/80/100
A (VS) Cylinder flow (DHW)
B (VK) Heating circuit flow
AB (VK) Boiler flow
1)
Dimensions for 1 inch male thread
2)
Dimensions for 22 mm compression fitting
Logamax plus
3-way diverter valve
1)
Pump
Residual head for the heating circuit at
ΔT = 20 K
Voltage
Frequency
Power consumption
Length of the connecting cable
Water connections
Differential pressure
Static pressure
K value
VS
Permissible ambient temperature
Medium temperature
Table 18 Specification of the external 3-way diverter valves
1) Controlled via boiler
48
GB162-50/65/80/100
110
55 90
130
129
84
100
AB
46
Rp14
A
100
6 720 642 463-27.1il
Unit
mm/inch Honeywell VC8010; 28/R1
(alternatively Wilo Stratos
mbar
V
Hz
W
m
mm/inch
bar
bar
3
m /h
°C
°C
When fitting the valve, ensure the correct
position is maintained. The motor must not
hang down.
V [m
3
/h]
8
7
6
5
4
3
2
1
0
0 25 50
Fig. 40 Flow rate curve of the external 3-way diverter
valves
a Flow rate curve Taconova, 32 mm/1¼ "
b Flow rate curve Honeywell type VC8010, 28 mm/1"
c Flow rate curve Honeywell type VC8010, 22 mm/¾ "
Δp
Pressure drop
KVS Flow capacity of the valve (in m
V
Flow rate
GB162-45
Taconova; 32/R1¼ Taconova; 32/R1¼
UPM 15-70 2W
25/1-8)
150
24
50–60
6
3
28/R1
4
20
7.7
0–65
1–95
6 720 645 821 (2010/09) – Logamax plus GB162
a
b
c
75 100 125 150 175
Δp [mbar]
6 720 642 463-28.1il
3
/h)
GB162-50/65 GB162-80/100
Magna 25-60 Magna 25-100
on site on site
250 150
24 24
50 50
3.5 3.5
3
32/R1¼ 32/R1¼
10 10
10 10
18 18
–10–55 –10–55
–15–95 –15–95
200
3