Filter
Top Products
9
Manual Operation Mode
This mode allows the user to manually turn the pump on or off.
AUTO The above display indicates that the unit is working in automatic mode. The
pump starts at a temperature difference of 15
o
F and runs as long as ? T is
above 7
o
F. The B symbol appears in upper display line next to the collector
symbol while the pump is running. User can switch to manual mode by pressing
ò key. By pressing ð key while centerline blinks, a hand symbol G in lower line
shows manual operation. Pressing ð one more time lets you turn the pump ON or
OFF. By pressing ñ key you change the pump operation.
ensor Designation – The factory-preset sensor is the thermistor (KTY) type. The KTY
tank sensor, white wire, should be used in a conditioned environment and will not be
permanently damaged up to 360
o
F.
S1 Sensor 1 (collector outlet)
S2 Sensor 2 (collector inlet or bottom of the tank)
Sensor wires can receive electromagnetic pulses, which can result in a wrong temperature
reading. The USDT 2004B reads sensor values every 50 ms. It can bundle several readings and
process their average.
The impedance characteristics of the USDT 2004B sensors (temperature dependencies) are
represented in the following table:
T 0 10 20 25 30 40 50 60 70 80 90 100°C
R(KTY)
1630
1772
1922
2000
2080
2245
2417
2597
2785
2980
3182
3392 Ω
S