McQuay SWP 018

IM708 7
Figure3. Condenser water pressure drop SWP018 -
SWP040
Note: HP = total unit compressor horsepower.
Figure4. Condenser water pressure drop SWP045 -
SWP105
Note: HP = total unit compressor horsepower.
Figure5. Economizer water pressure drop, SPW018-
SPW105
Note:
!
Includes coil, control valves and interconnecting
piping.
"
Add this∆P to condenser ∆P to obtain unit ∆P
for pump selection.
Figure6. Water regulating valve pressure drop.
Head pressure control
40
20
10
8
6
4
3
20
40
60 80
100
200 300
Condenser Flow Rate (gpm)
Pressure Drop (ft H
2
O)
12 HP
18 HP
24 HP 28 HP
32 HP
36 HP
40 HP
60
40
20
10
8
6
4
2
80 100
200 300
400 500
Condenser Flow Rate (gpm)
Pressure Drop (ft H
2
O)
40HP
46HP 56HP
60HP
70HP
80HP
78HP
84HP
90HP
105HP
120HP
52HP
Condenser Flow Rate (gpm)
Pressure Drop (ft H
2
O)
50
10
100 500
105
045-095
035-040
018-028
10
1
40
10
1
0.1
10
100
500
Condenser Flow Rate (gpm)
Pressure Drop (ft H
2
O)
018-040
045-095