Viessmann VITOCAL 300 Installation And Service Instructions Manual page 23

System version 2
A Power supply from the control
panel (230 V)
B Temperature limiter for underfloor
heating system qO with heating
circuit pump wW; switch in series.
Required devices
Pos. Description
1
Vitocal 300 heat pump
2
Three-way diverter valve, heating/DHW
4
Diaphragm expansion vessel
qW
Outside temperature sensor
qE
Room temperature sensor of the direct heating circuit
qR
Room temperature sensor of the heating circuit with mixer 1
qT
Overflow valve
qZ
Direct heating circuit (radiator heating circuit)
qU
Heating circuit with mixer (underfloor heating circuit)
qO
Temperature limiter (only required for the underfloor heat-
ing circuit)
wQ
Heating circuit pump, direct heating circuit
wW
Heating circuit pump of the heating circuit with mixer
wE
Mixer-3 (heating circuit with mixer)
wO Flow temperature sensor for mixer-3 wE
rO
Zero volt contact for central fault messaging (acoustic or
optical alarm equipment, on site)
Option "Heating water buffer cylinder"
6
Heating water buffer cylinder
7
Buffer cylinder temperature sensor (bottom)
8
Buffer cylinder temperature sensor (top)
Natural cooling option
qI
Contact humidistat
wP
Three-way diverter valve heating/cooling
wR
Vitotrans plate-type heat exchanger
wT
Frost stat
wZ
Circulation pump (primary cooling circuit pump)
wU
Mixer-3 (primary cooling circuit)
wI
Two-way motorised ball valve
rE
Natural cooling extension kit
rR Flow temperature sensor for mixer wU
(cont.)
Preparing for installation
Qty.
1
1
1
1
1
1
as required
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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