Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 26

Boiler Connections
System Layout 3
Equipment required
Pos. Description
Heat source
Vitoligno 300-C with
1
Ecotronic
2
3 Outdoor temperature sensor ATS
Buffer tank temperature sensor PTS, top
4
5 Buffer tank temperature sensor PTS, centre
6 Buffer tank temperature sensor PTS, bottom
Safety equipment block with safety valve
7
8 Expansion vessel
Boiler circuit pump KKP
qZ
Return mixing valve - low temperature protection package
qU
qI Low temperature protection package
DHW heating by boiler
Multi mode heating water buffer tank
qP
DHW pump ZP (provide electrical connection on site)
qE
Threaded DHW circulation fitting
qR
DHW heating by solar thermal system
Solar collectors
wQ
Solar Divicon
wW
wE Solar circuit pump R1
Set of temperature sensors for solar circuit
wR
– Collector temperature sensor KOL
wT
– Tank temperature sensor SOL
wZ
High limit safety cut-out HLSC
wU
wI Thermostatic DHW circulation set
Heating circuit I
rP
Heating circuit pump HKP M1 (heating circuit I)
rQ
and...
3-way mixing valve
rW Strap on temperature sensor
rE Mixing valve motor M1
Heating circuit II
tP
Heating circuit, comprising:
tQ
Heating circuit pump HKP M2 (heating circuit II)
and...
3-way mixing valve
Strap on temperature sensor
tW
Mixing valve motor M2
tE
Temperature limiter to restrict the maximum temperature of underfloor heating systems
tR
– Version with immersion sensor
– Version with contact sensor
Accessories
Vitotrol 200A (max. two Vitotrol 200A per Ecotronic)
uP
or...
Vitotrol 300A (max. one Vitotrol 300A per Ecotronic)
or...
Vitotrol 350
uQ
Low water cutoff
uW
KM BUS distributor
uU
Output feedback
iQ
External default output
iW
External default output
iE
ON/OFF switch
iR
26
(continued)
Vitoligno 300-C Installation/Service