Viessmann Vitotronic SPS Service Instructions Manual page 55

Overall hydraulic diagram
Note
This scheme is a general example without shut-off valves or safety equipment. This does not replace the need for
on-site engineering. Determine the type of heat source, groundwater or geothermal probe during the engineering
process.
Equipment required
Pos. Designation
3 additional heating circuits (heating only), controlled by the slave heat pump
A
Cascade (max. 2 heat pumps)
B
Heat pump communication via Modbus Ethernet
With external Modbus communication: Modbus Ethernet connection to master heat pump
Primary
C
Secondary
D
Heat pump
1
Heat pump control unit
2
3-way diverter valve "central heating/DHW heating"
3
Primary pump
4
Secondary pump
5
Outside temperature sensor
6
Safety assembly, secondary circuit
7
Expansion vessel, secondary circuit/residual heat circuit
8
Expansion vessel, primary circuit/residual heat circuit
9
Geothermal probe manifold
qP
Safety assembly, primary circuit
qQ
qW Pressure switch, primary circuit
Frost stat
qE
System separator, groundwater
qR
Flow switch, groundwater
qT
Filter, groundwater
qZ
Circulation pump, groundwater
qU
External heat generator
wP
External heat generator control unit
wQ
Outside temperature sensor
wW
System flow temperature sensor
wE
External heat generator mixer
wR
DHW cylinder
eP
Cylinder temperature sensor, top
eQ
Electric booster heater
eW
Cylinder loading pump
eE
Heat exchanger, cylinder loading system
eR
Flow limiter
eT
eZ 3-way mixer
DHW circulation pump
eU
Flow temperature sensor, cylinder heating
eI
Cylinder temperature sensor, bottom
eO
Heating water buffer cylinders
tP
Buffer temperature sensor, top
tQ
Buffer temperature sensor, bottom
tW
3-way diverter valve, cooling mode
uP
(cont.)
Diagnosis
55