Viessmann Vitocal 300-G Installation And Service Instructions Manual page 15

Primary circuit, type BW 301.B + BWS 301.B (2-stage)
Hydraulic installation scheme
22
23
24
--2/X3.8;3.9--
19
---------
27 26 28
Fig. 9
Equipment required
Pos. Designation
Heat pump stage 1
1
Heat pump control unit
2
Heat pump stage 2
9
qT Common primary pump
Primary circuit flow temperature sensor: For in-
qZ
stallation, see page 40.
Primary circuit return temperature sensor: For
qU
installation, see page 40.
Frost stat, primary circuit
qO
Brine accessory pack
wP
Pressure switch, primary circuit
wQ
Separating heat exchanger, primary circuit
wW
Flow switch, well circuit (remove jumper before
wE
connecting)
21
20
--F3--
17
15
(cont.)
16
--F2--
9 1
2
Pos. Designation
Dirt trap
wR
Well pump (suction pump for groundwater; con-
wZ
nect via on-site contactor with fuse protection)
230 V connection: See page 13.
■
400 V connection: See pages 16 and 13.
■
Delivery well
wU
Return well
wI
Note
Either fit primary circuit flow and return temperature
sensors in the sensor wells of the hydraulic modules
(accessories) or use a sensor well set (accessories).
Preparing for installation
15