RUV X.X – This display shows the software revision number.
NR O – This is PROGRAM 0 which indicates simple operation of unit as a Universal Solar Differential Temperature (USDT) controller. Change this value to 1 (NR 1) for activation of the third sensor or pulse flow meter input (PROGRAM 1).
Hysteresis Bandwidth
User can program hysteresis (temperature range for output control) by using max? and max=.
For |
|
max?1 | Pump stops above tank temperature (T2) |
max=1 | Pump runs again below this set point (T2) |
Delta T Adjustment
diff=1 | Pump runs when temperature difference between collector T1 (collector) and T2 |
| (tank) exceeds this value. Factory setting is 15 oF. Consult your collector |
| manufacturer for the recommended value. |
diff?1 | Pump stops when temperature difference between collector T1 (collector) and T2 |
| (tank) reaches this value. Factory setting is 7 oF. Consult your collector |
| manufacturer for the recommended value. |
Manual Operation Mode
AUTO The above display indicates that the unit is working in automatic mode. The pump starts at a temperature difference of 15 oF and runs as long as ? T is above 7 oF. The B symbol appears in upper display line next to the collector
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