Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 46

Preparing for installation
System example 1
Pos. Description
Heat source
1 Heat pump
2 Heat pump control unit
3 Outside temperature sensor
5
Circulation pump for cylinder heating (heating water side)
6 Secondary pump
8 KM BUS distributor
qW Safety equipment block with safety assembly
qE Expansion vessel
Primary circuit
qT Primary pump
qZ Primary circuit flow temperature sensor (integrated into heat pump)
qU Primary circuit return temperature sensor (integrated into heat pump)
wP Brine accessory pack
wQ Pressure switch, primary circuit
wW Brine distributor for geothermal probes/geothermal collectors
wU
Geothermal probe/geothermal collector
DHW heating with a primary store system
eP DHW cylinder
eQ Solar cylinder temperature sensor (connection S2 to Vitosolic)
eW Cylinder temperature sensor (connection to heat pump control unit)
eE Cylinder primary pump (DHW side)
eR Plate heat exchanger
eT Flow limiter
eZ Motorised two-way valve, normally closed
eU DHW circulation pump
DHW heating with a solar thermal system
rQ High limit safety cut-out for DHW cylinder to switch off the solar circuit pump
R1 rE
rW Solar-Divicon
rE Solar circuit pump R1
rR Collector temperature sensor (Vitosolic standard delivery, connection S1)
rT
Solar collectors
rU Vitosolic 200 (observe separate installation instructions)
rI Safety equipment block with safety assembly
rO Expansion vessel
46
(cont.)