Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 24

Preparing for installation
Primary circuit, type WW + BWS (two-stage)
Equipment required
Pos. Designation
1 Heat pump stage 1
2 Heat pump control unit
9 Heat pump stage 2
qT Primary pump, heat pump stage 1
qZ Primary circuit flow temperature sensor (for installation, see page 87)
qU Primary circuit return temperature sensor (for installation, see
page 87)
qO Frost stat, primary circuit
wP
Brine accessory pack
wQ Pressure switch, primary circuit
wW Heat exchanger, primary circuit
wE Flow limiter, well circuit (remove jumper before connecting)
wR Dirt trap
wT
Primary pump, heat pump stage 2
wZ Well pump (suction pump for groundwater; connect via on-site contactor
with fuse protection)
■ 230 V connection: See page 25
■ 400 V connection: See pages 30, 26
wU
Delivery well
wI Return well
Electrical installation scheme
Overview of electrical connections and
details regarding the PCBs, see from
page 67 and the separate service
instructions, Vitotronic 200 heat pump
control unit.
24
(cont.)