Trane GETB Installation Manual page 23

Water Pressure Drop
Table 7 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 7: Water pressure drops (WPD) in feet of head
Unit Size
GPM
EWT
F
1.5
009 2.3 77
2.7
2.5
012 3.1 77
3.7
2.3
015 3.5 77
4.2
2.9
018 4.5 77
5.4
3.9
024 6.0 77
7.2
5.9
036 9.0 77
10.8
Water Volume
Table 8 is provided for use in calculating glycol requirements for the unit.
Table 8: Water volume
Unit Water Side
Model Volume
GET Cubic In.
009 17.0
012 17.0
015 36.0
018 48.0
024 55.0
036 71.0
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. Compare the pressure differential to Table 6 to determine flow.
Start-up Checklist and Log
Use the form on page 24 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-SVN08B-EN
Operating Pressures
Cooling Heating
Ft. Head EWT
Pressure F
5.1
9.3 55
12.4
10.2
14.6 55
19.6
6.2
12.3 55
16.8
2.4
4.9 55
6.6
5.0
9.9 55
13.2
4.9
9.8 55
13.3
Water Side Water Side
Volume Volume
Cubic Ft. Gallons
0.010 0.074
0.010 0.074
0.021 0.156
0.028 0.208
0.032 0.238
0.041 0.307
Ft. Head
Pressure
5.8
10.6
14.0
8.5
16.6
22.0
7.4
14.1
18.8
3.1
5.9
7.7
6.2
11.8
14.5
5.5
11.0
14.7
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