Operating Pressures
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
Unit Size |
| Cooling | Heating | |||
GPM | EWT | Ft. Head | EWT | Ft. Head | ||
|
| F | Pressure | F | Pressure | |
WPVJ 018 | 5.0 |
| 7.5 |
| 9.0 | |
WPVJ 024 | 6.1 |
| 10.2 |
| 12.1 | |
WPVJ 030 | 7.2 |
| 4.9 |
| 6.0 | |
WPVJ 036 | 8.6 | 77 | 6.7 | 55 | 7.9 | |
WPVJ 042 | 10.1 | 8.8 | 10.0 | |||
|
| |||||
WPVJ 048 | 11.5 |
| 7.8 |
| 9.0 | |
WPVJ 060 | 14.9 |
| 12.4 |
| 14.1 | |
WPVJ 072 | 16.5 |
| 14.8 |
| 14.1 | |
WPHF 021 | 5.3 |
| 6.9 |
| 7.6 | |
WPHF 027 | 6.8 |
| 11.1 |
| 12.3 | |
WPHF 035 | 8.7 | 77 | 17.9 | 55 | 19.8 | |
WPHF 040 | 9.9 | 23.1 | 25.6 | |||
|
| |||||
WPHF 047 | 11.6 |
| 15.0 |
| 16.6 | |
WPHF 057 | 14.1 |
| 22.0 |
| 24.4 | |
Water Volume
Table 5 is provided for use in calculating glycol requirements for the WPVJ unit.
Unit | Unit | Water Side | Water Side | Water Side |
Model | Size | Volume | Volume | Volume |
|
| Cubic In. | Cubic In. | Gallons. |
WPVJ | 55 | 0.032 | 0.238 | |
WPVJ | 105 | 0.061 | 0.455 | |
WPVJ | 259 | 0.150 | 1.121 |
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
Pressure
Using the P/T ports and one
Start-up Checklist and Log
Use the form on page 30 to log system and unit temperatures during
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.
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