Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 27 / 160

B
Power supply of the external heat
source (on-site)
C
Power supply from the control
panel (230 V)
D
Temperature limiter for underfloor
heating system
qO
with heating
circuit pump
wW
; switch in series
Required devices
Pos. Description Qty.
1
Vitocal 300 heat pump 1
2
Three-way diverter valve, heating/DHW 1
4
Diaphragm expansion vessel 1
qW
Outside temperature sensor 1
qE
Room temperature sensor of the direct heating circuit 1
qR
Room temperature sensor of the heating circuit with mixer 1
qT
Overflow valve 1
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) as required
wQ
Heating circuit pump, direct heating circuit 1
wW
Heating circuit pump, mixer circuit 1
wE
Mixer-3 (heating circuit with mixer) 1
wO
Flow temperature sensor for mixer
wE
1
rO
Zero volt contact for central fault messaging (acoustic or
optical alarm equipment, on site) 1
"Low loss header" option
5
Low loss header 1
8
Buffer cylinder temperature sensor (top) 1
Option "External heat source"
3
High limit safety cut-out 70 °C for switching the external
heat source 2
9
Temperature sensor mixer "external heat source" 1
qP
Mixer "external heat source" 1
qQ
Boiler water temperature sensor of the external heat
source 1
tP
Contactor relay for switching the external heat source on-site
Natural cooling option
qI
Contact humidistat 1
wP
Three-way diverter valve heating/cooling 1
wR
Vitotrans plate-type heat exchanger 1
wT
Frost stat 1
System version 3
(cont.)
27
Preparing for installation
55
92
901
GB