Appendix
0020237057_01 Installation instructions
27
Appendix
A
Setting values for basic system diagram, VR 70 and VR 71
A.1
Basic system diagram configuration
Each heating installation is based on a system diagram with corresponding connection diagram. A separate basic diagram
book contains the basic system diagrams and the corresponding wiring diagrams with explanations.
A.2
Gas-/oil-fired condensing boiler (eBUS)
Cylinder
Equipment
Heating cir-
cuits
Set value for
Basic sys-
tem dia-
gram
VR 70
VR 71
Monovalent domestic hot water
cylinder or combi cylinder
Cylinder charging using the condensing
boiler
1 direct
1
Monovalent domestic hot water
cylinder or combi cylinder
Cylinder charging using the condensing
boiler
Low loss header for heating circuits only
1 direct
1 mixed
1
1
Monovalent domestic hot water
cylinder or combi cylinder
Cylinder charging using the condensing
boiler
Low loss header for heating circuits only
2 mixed
1
5
Monovalent domestic hot water
cylinder or combi cylinder
Cylinder charging using the condensing
boiler
Low loss header for heating circuits only
3 mixed
1
3
Monovalent domestic hot water
cylinder or combi cylinder
Low loss header for heating circuits and
domestic hot water cylinders
1 direct
1 mixed
2
1
Monovalent domestic hot water
cylinder or combi cylinder
Low loss header for heating circuits and
domestic hot water cylinders
3 mixed
2
3
A.3
Gas-/oil-fired condensing unit (eBUS) and solar hot water support
Cylinder
Equipment
Heating cir-
cuits
Setting for
System
diagram
VR 70
VR 71
Bivalent domestic hot water cylin-
der
Cylinder charging using a condensing unit
and solar heat
1 direct
1
6
Bivalent domestic hot water cylin-
der
Cylinder charging using a condensing unit
and solar heat
3 mixed
1
2
A.4
Gas-/oil-fired condensing unit (eBUS) and solar hot water and heating support
Cylinder
Equipment
Heating cir-
cuits
Setting for
System
diagram
VR 70
VR 71
Combi storage tank
Hydraulic block
Low loss header for heating circuits only
1 mixed
2
12
Combi storage tank
Hydraulic block
Low loss header for heating circuits only
3 mixed
2
2
allSTOR
buffer cylinder
Buffer cylinder charging using a condens-
ing unit and solar heat
1 mixed
1
3
allSTOR
buffer cylinder
Buffer cylinder charging using a condens-
ing unit and solar heat
3 mixed
1
6