Viessmann VITOCAL 300 Installation And Service Instructions Manual page 20

Preparing for installation
System version 1
A Power supply from the control
panel (230 V)
B Internally connected heating cir-
cuit pump. When using a tempera-
ture limiter for underfloor heating
system qO, disconnect the pump
from terminal 14 and switch the
temperature limiter 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
qT
Overflow valve
qZ
Direct heating circuit (underfloor heating circuit)
qO
Temperature limiter (only required for the underfloor heat-
ing circuit)
rO
Zero volt contact for central fault messaging (acoustic or
optical alarm equipment, on site)
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
rI
Circulation pump (secondary cooling circuit pump)
20
(cont.)
Qty.
1
1
1
1
1
1
as required
1
1
1
1
1
1
1
1
1
1
1