The table below will assist you in identifying the region where you live. There are four basic ET regions, each with descriptions of the region, along with typical ET and temperature characteristics. If possible, choose the region based upon average July ET or peak summer ET.
| A | B | C | D |
|---|---|---|---|
| Based upon the ET of your region using the average July ET or peak summer ET. This is the preferred option when selecting your region. | Based upon the temperature for your region using the average July or the driest month high temperature (not the highest temperature for July. | Based upon the general description of your region. | Region based on A through C |
| If the average July* ET is is 0.17" (4.3 mm) or less per day | If the average temperature for July* is 65°–75°F (18°–24°C) |
| Region 1 |
| If the average July* ET is 0.18"–0.23" (4.6–5.8 mm) per day | If the average temperature for July* is 75°–85°F (24°–29°C) |
| Region 2 |
| If the average July* ET is 0.24"–0.29" (6.1–7.4 mm) per day | If the average temperature for July* is 85°–95°F (29°–35°C) |
| Region 3 |
| If the average July* ET is 0.30" (6.7 mm ) or more per day | If the average temperature for July* is 95°–105°F (35°–41°C) |
| Region 4 |
It is important to understand that Solar Sync provides a global Seasonal Adjustment to the controller. This means that all station run times will be modified by the Seasonal Adjustment percentage shown. When programming the controller, the run times should be entered that represent peak season watering schedules. If the Solar Sync is adjusting to the appropriate Seasonal Adjustment value but the run time for a particular station appears to be too long or short, adjust the station run time in the controller program.
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