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8.2 - nPsh (net Positive suction head) required ;
hydronic module option
Design hydronic circuit in order to guarantee that NPSH
(Net Positive Suction Head) is higher or equal to required
NPSH + 50 kPa.
100
90
80
70
60
50
40
30
20
10
0
0
120
100
80
60
40
20
0
8.3 - flow rate and cooling capacity calculations
Units with hydronic module enable direct monitoring of
flow rate and cooling capacity through IHM (refer to
30XAV-ZE control manual).
Fluid pressure is measured by pressure sensors fitted at
pump inlet and unit outlet. The system calculates the flow
rate corresponding to measured differential pressure.
Combined with temperature difference between
evaporator inlet and outlet, this flow rate calculation
permits to provide a monitoring of cooling capacity.
Low pressure pumps (options 116T/116U)
low pressure pumps (options 116T/116U)
5
10
High pressure pumps (options 116R/116S)
high pressure pumps (options 116r/116s)
0
5
10
15
20
25
Flow rate [L/s]
Flow rate [L/s]
15
20
25
Flow rate [L/s]
Flow rate [L/s]
Calculations are only applicable with fresh water. In case
of brine solution (ex: glycol) other than fresh water, flow
and cooling capacity provided won't be accurate.
These data are given for indicative purpose to user and
may vary depending on hydronic circuit fouling and
proper operation of the pump. Carrier does not undertake
the accuracy of this information.
30
35
40
30
35
40
29
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