Viessmann VITODENS 200-W Type B2HA Technical Manual page 44

Installation accessories
Wilo Yonos PARA Opt. 25/7.5
Operating mode: Constant differential pressure
■ Energy efficiency index EEI ≤ 0.21
80
800
70
700
600
60
2
500 50
400
40
300
30
200 20
100
10
0 0
0.5 1.0 1.5 2.0 2.5
0
Flow rate in m³/h
A Divicon R 1¼ with mixer
B Divicon R 1¼ without mixer
Operating mode: Variable differential pressure
80
800
70
700
600 60
500
50
400
40
300
30
200
20
100
10
0 0
0.5 1.0 1.5 2.0 2.5
0
Flow rate in m³/h
A Divicon R 1¼ with mixer
B Divicon R 1¼ without mixer
VIESMANN
44
(cont.)
A
B
3.0 3.5
A
B
3.0 3.5
Grundfos Alpha 2.1 25-60
■ With power consumption display
■ With Autoadapt function (automatic matching to the pipework)
■ With night setback function
■ Energy efficiency index EEI ≤ 0.20
700 70
600 60
500 50
M
400 40
K
300 30
200 20
L
100 10
E
A
0 0
0 0.5 1.0
Flow rate in m³/h
A Divicon R ¾ with mixer
B Divicon R 1 with mixer
C Divicon R 1¼ with mixer
D Divicon R ¾, R 1 and R 1¼ without mixer
E Stage 1
F Stage 2
G Stage 3
H Min. proportional pressure
K Max. proportional pressure
L Min. constant pressure
M Max. constant pressure
Bypass valve
Part no. 7464889
For hydronic balancing of the heating circuit with mixer. To be inser-
ted into the Divicon.
G
H
F
C
B
D
1.5 2.0 2.5
VITODENS 200-W