Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 17

Vitoligno 300-C Installation/Service
System Layout 1
Equipment required
Pos. Description
Heating circuit II (continued)
tP
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
Heating circuit III
zP
Heating circuit, comprising:
zQ
Heating circuit pump HKP M3 (heating circuit III)
and...
3-way mixing valve
Strap on temperature sensor
zW
Mixing valve motor M3
zE
Heating circuit IIII
uP
Heating circuit distributor assembly, comprising:
uQ
Heating circuit pump HKP M4 (heating circuit IIII)
and...
3-way mixing valve
Strap on temperature sensor
uW
Mixing valve motor M4
uE
Accessories
Vitotrol 200A (max. two Vitotrol 200A per Ecotronic)
uZ
or...
Vitotrol 300A (max. one Vitotrol 300A per Ecotronic)
or...
Vitotrol 350
uU
Low water cutoff
uI
KM BUS distributor
uO
Output feedback
iQ
External default output
iW
External demand
iE
ON/OFF switch
iR
(continued)
Boiler Connections
17