Filter
Top Products
8
Par Using the navigation key ^_ allows you to select the desired parameter while you are in
the program mode. Press the selection key ò once to select the parameter in the window.
Selected parameter blinks allowing you to modify it. You can modify the selected parameter
while the middle window blinks by pressing the ï or ð key. The unit accepts the new value by
pressing the ñ key once.
RUV 2.0 – This display shows the software revision number.
NR O – This indicates the USDT 2004B employment as a basic solar hot water heating controller.
PROGRAMMING THE TEMPERATURE RANGE
USDT 2004B is factory set at T2 > 160
o
F PUMP OFF, T2 < 150
o
F PUMP ON. The user may
program a different temperature range (hysteresis bandwidth) if required. In this case, there are
two temperatures that should be entered:
Tank Overheating Protection
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)
Temperature Differential Adjustment
diff=1 Pump runs when temperature difference between collector T1 (collector) and T2
(tank) exceeds this value. Factory setting is 15
o
F. 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
o
F. Consult your collector
manufacturer for the recommended value.