Thermo Products USDT 2004B manual Rkty

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 oF and runs as long as ? T is above 7 oF. 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

òkey. 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.

S

S1

S2

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 oF.

Sensor 1 (collector outlet)

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

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