Technical Data
©2022 nVent
89217391 Rev. A
125
14.5 Secondary circuit
NOTE
Fill the circuit with water and an anti-corrosion agent. Alternatively, fill it with an
antifreeze and anti-corrosion agent (monoethylene glycol, e.g. Antifrogen N).
Temperature set point range at inlet with glycol or water (min./max.)
°C
20 … 45
°F
68 … 113
Required flow rate to achieve 800 kW cooling capacity at 4 Kelvin (water)
l/min
850
US gal/min
225
Maximum system pressure
bar
8.6
psi
125.0
Maximum external differential pressure at 850 LPM (single pump mode)
bar
3.4
psi
49.0
Max allowable static pressure
bar
3.5
psi
50.8
Gas pressure at expansion tank
bar
1.0
psi
14.5
Pressure relief valve setpoint
bar
9.0
psi
130.5
System volume
l
100
gal
26.4
Filter in the secondary circuit (mesh size)
µm
50
Water quality
pH value
pH
8.0
… 9.5
If there is a risk of frost,
use an anti-corrosion agent and biocides
.
Alternatively, use glycol with an anti-corrosion agent *).
NOTE
•
Comply with the minimum concentration specified by the manufacturer,
e.g. 25 %.
•
Glycol reduces the heating output by up to 15 % depending on the
concentration.
%
50 max.
Sulphides
ppm
<1
Sulphates
ppm
<10
Chloride
ppm
<5
Colonies
CFU/ml
<100
Total hardness CA CO3
ppm
0
Conductivity
µS/cm
0.2 … 20
Residues after evaporation
ppm
<50
Turbidity
NTU
<20
Secondary circuit inlet (
Tri-clamp BPE-ASME
)
Sec. IN
inch
3
Secondary circuit outlet (
Tri-clamp BPE-ASME
Sec. OUT
inch
3
NOTE
If a "Tri-Clamp
BPE-ASME"
connection fitting is used, observe the dimension
drawing in the appendix.