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8.9 Connection plan
T1 Temperature sensor
Outside air
8.10 Brine circulation pump
Three sizes of pump are recommended, in
order to guarantee that there is sufficient
brine mass flow. Please refer to the table
shown here for determining the suitable pump
and pump stage.
The Wilo ST 15/6 circulation pump that we
selected delivers this brine mass flow, e.g. for
a room air system with a volumetric flow of
250 m³/h, from a setting of "Speed level II" or
higher.
T2 Temperature sensor outside air
Air
volu-
metric
flow
(V)
Ground
extrac-
tion
rating
(Q)
Re-
quired
brine
volu-
metric
flow
Pump level
to be set
[m³/h]
[W]
[l/h]
UPS
25-40
or
Wilo
ST 15/4
UPS
25-60
or
Wilo
ST 15/6
UPS
25-80 or
Wilo
ST 15/8
100
533
178
I
I
I
150
800
267
I
I
I
200
1067
356
II
I
I
250
1333
444
II
I
300
1600
533
III
I
350
1867
622
II
400
2133
711
III