Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual page 32

Preparing for installation
Primary circuit: brine/water, cascade
Equipment required
Pos. Designation
1 Heat pump I
2 Heat pump control unit with LON communication module (accessory)
9 Heat pump II
qT
Primary pump, heat pump I (fail-safe)
Note
For 2-stage Vitocal 300-G Pro, a primary pump can be used for stages 1
and 2 respectively.
wP
Brine safety assembly
wQ Pressure switch, primary circuit
wW Brine distributor, geothermal probes/collectors
wT Primary pump, heat pump II (fail-safe)
Note
For 2-stage Vitocal 300-G Pro, a primary pump can be used for stages 1
and 2 respectively.
wU Geothermal probes/geothermal collectors
Electrical installation scheme
For a summary of electrical connections,
see from page 53 and separate "Con-
nection and wiring diagram".
32
(cont.)