Unit installation

CDU Installation Guide Page 10
Cooling Distribution Unit
TECHNICAL DATA (continued)
The above graph shows the available pressure differential at the secondary supply and return connections
of the CDU. Curves labelled 1 to 6 RDHx are with the internal manifold fitted for 1 to 6 external circuits.
These curves also take into account the pressure drop through the self sealing, quick release couplings.
The curve labelled U/F Manifold is with flexible tails fitted for direct connection to an under floor installed
manifold system (see page 8).
0
2
4
6
8
10
12
14
16
0
1
2
3
4
5
6
7
8
9
20 30 40 50 60 70 80 90 100
Minimum Temperature Differential (
o
F)
Minimun Temperature Differential (
o
C)
Percentage of Full Load
Minimum Approach Temperatures
120kW CDU (water)
120kW CDU (30% glycol)
150kW CDU (water)
150kW CDU (30% glycol)
dummy
The above graph shows the minimum temperature differential possible between the Primary chilled water
supply temperature the Secondary set point temperature for the percentage of full CDU rated load. Graph
data based around full primary flow of 230L/M (60.8USgpm) and secondary flow of 240L/M (63.4USgpm).
0 5 10 15 20 25 30 35 40 45 50 55 60
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0 30 60 90 120 150 180 210 240
Flow (Usgpm)
Pressure (PSI)
Pressure (Bar)
Flow (L/M)
Pressure available from CDU
U/floor manifold
1 RDHx
2 RDHx
3 RDHx
4 RDHx
5 RDHx
6 RDHx
Series8