Viessmann Vitocal 300-G Installation And Service Instructions Manual page 44

Preparing for installation
System version 3 (type BW/WW)
Required equipment
Pos. Description
Heat source
1 Heat pump
2 Instantaneous heating water heater (accessories)
3 Compressor
Implement the compressor power supply with 5 x 2.5 mm
For information regarding the power connection, see page 89
On-site fuse protection
If a full wave soft starter is installed (see type plate), fuses must have
Z characteristics
4 Integral control unit (implement the control unit power supply with 3 x
2
1.5 mm ; on-site fuse protection
Integral three-way valve "heating/DHW" (only for type BWC/WWC)
5 Primary pump (already integrated and connected for type BWC/WWC)
6 Secondary pump, system flow (already integrated and connected for
type BWC/WWC)
7 Circulation pump for cylinder heating (only for type BW/WW)
8 Safety equipment block with safety assembly
9 Expansion vessel (accessory)
qP Outside temperature sensor
qQ KM BUS distributor
qW Geothermal probe/geothermal collector
qE Brine distributor for geothermal probes/collectors
qR Brine accessory pack
qT Brine pressure limiter (if no brine pressure limiter is used, always insert
the jumpers supplied across the connections, otherwise the heat pump
will fail to operate)
External heat source
wP External heat source
wQ Connection of an external heat source (connection via terminals "Exter-
nal demand for external heat source")
wW Motor for directly controlled three-way mixer
wE System flow temperature sensor
wR High limit safety cut-out 70 °C for shutting down an external heat source
(on-site)
wT High limit safety cut-out 70 °C for switching off the secondary pump (on-
site)
wZ Circulation pump for reheating the cylinder ( max. power consumption
130 W)
wU Boiler water temperature sensor in the external heat source for connec-
tion to the heat pump
44
(cont.)
16 A)
2