20
Pos.
Description
7
Only for type BW 302.D140, BW 302.D180 and BW 302.D230 (2-stage heat pumps):
Secondary pump 2 (fail-safe)
Note
■
Contactor relay required
■
Size secondary pump 1
5
for partial load.
qT
Primary pump 1 (fail-safe)
wT
Optionally: 2nd primary pump (fail-safe) for stage 2
Note
■
Contactor relay required
■
Size primary pumps
qT
and
wT
to at least 75 % each of the nominal flow rate.
Electrical installation scheme
For a summary of electrical connections, see from
page 31 and separate "Connection and wiring dia-
gram".
DHW heating (type BW 302.D090 to BW 302.D230)
Hydraulic installation scheme
W
30
36
35
33
34
WW
KW
32
X
37
Fig. 14
W
Heat pump interface
X
Interface to the solar thermal system or the exter-
nal heat generator
KW Cold water
WW DHW
Required equipment
Pos.
Description
eP
DHW cylinder
eW
Cylinder temperature sensor
eE
Cylinder loading pump (on the DHW side, fail-safe)
Preparing for installation
Hydraulic connection requirements
(cont.)
5838144
Installation
Summary of Contents for Vitocal 300-G Pro BW 302.D090
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