Trane WPHF Installation And Owner's Manual page 29

Water Pressure Drop
Table 4 should be used to define feet of head/pressure drop. Note: To calculate feet of head, when using gauges that read
in PSIG, multiply PSI by 2.31.
Table 4: Water pressure drops (WPD) in feet of head
Cooling
Unit Size
GPM EWT
F
WPVJ 018 5.0
WPVJ 024 6.1
WPVJ 030
7.2
WPVJ 036 8.6
77
WPVJ 042
10.1
WPVJ 048 11.5
WPVJ 060 14.9
WPVJ 072
16.5
WPHF 021 5.3
WPHF 027
6.8
WPHF 035 8.7
77
WPHF 040 9.9
WPHF 047 11.6
WPHF 057 14.1
Water Volume
Table 5 is provided for use in calculating glycol requirements for the WPVJ unit.
Unit Unit
Model Size
WPVJ 018-024
WPVJ 030-042
WPVJ 048-072
Flow Checks
For the operating temperature drop (heating) and rise (cooling), refer to Table OP1 and OP2 for the proper water tempera-
ture change. Depending on the unit size, entering water temperature and water flow rate, the cooling temperature rise is
from 8°F-16°F . Based on the same criteria for heating, the temperature drop is from 2°F-13°F .
Pressure
Using the P/T ports and one 0-60 psi pressure gauge with the P/T port adapter, measure the pressure difference between
the water-in and water-out connections.
Start-up Checklist and Log
Use the form on page 30 to log system and unit temperatures during start-up.
WARNING
Live Electrical Components!
During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with
live electrical components. Have a qualified licensed electrician or other individual who has been properly
trained in handling live electrical components perform these tasks. Failure to follow all electrical safety pre-
cautions when exposed to live electrical components could result in death or serious injury.
WSHP-SVX04A-EN
Operating Pressures
Heating
Ft. Head EWT Ft. Head
Pressure F Pressure
7.5 9.0
10.2 12.1
4.9 6.0
6.7 7.9
55
8.8 10.0
7.8 9.0
12.4 14.1
14.8 14.1
6.9 7.6
11.1 12.3
17.9 19.8
55
23.1 25.6
15.0 16.6
22.0 24.4
Water Side Water Side
Volume Volume
Cubic In. Cubic In.
55 0.032
105 0.061
259 0.150
Water Side
Volume
Gallons.
0.238
0.455
1.121
29