Thermo Products USDT2004 manual Btu, Out, Sen, Llp, Gal, Glycol, Clear, Dif

max=2 Pump runs again below this set point (T3)

Energy calculation mode (PROGRAM 1):

USDT 2004 computes the energy production as a function of the temperature differential and fluid volume. In addition, the system anti-freeze (Glycol) percentage should be entered as it affects the thermal conductivity and heat transfer rate. Press the Advance key ïð briefly until BTU appears in centerline and press the key ò. Designate sensor inputs for example T1 as collector inlet and T2 as collector outlet temperature. F SEN can be connected to a flow meter or be a constant number in a closed loop solar system.

BTU	Energy calculation mode
S IN	Sensor port selection for inlet temperature (1, 2, 3, --)
S OUT	outlet temperature (1, 2, 3, --)
F SEN	Sensor port selection for flow rate (1, 2, 3, --)

Energy calculation will be initiated only after temperature sensor ports are designated. Flow rate can be either a constant number to be entered by user, or from a flow meter input. To activate the energy calculation without using the flow meter's impulse input, a dash (-) must be selected for F SEN channel followed by the constant flow rate in gph (gallon per hour) unit.

LLP	Flow meter rate impulse number in liter per pulse, if flow meter is
	used
GAL	Constant flow rate in gph instead of flow meter reading in (--)
	sensor mode
GLYCOL	Anti-freeze percentage
CLEAR	Sets the BTU meter's counter to zero
DIF	Sensor calibration

The output of USDT 2004 unit is kW for system power and kWh or MWh for collected energy.

dvancedAMode – USDT 2004 is extremely powerful. It can be used in wide range of applications such as a BTU meter, a boiler fuel optimizer, a swimming pool temperature differential controller, a greenhouse temperature regulator, an air handler, and more. Factory

settings are exclusively for solar water heating systems in the USA market. However, all its parameters can be changed to meet the unique requirements of other applications. The user may use access code "64" to modify the USDT 2004 program mode and its parameters.

Men This mode is for advanced applications

The factory setting will be retrieved by pressing and holding ò key during powering of the unit. A “RESTOR” displays for three seconds while factory settings are restored.

Selection of different sensor types, energy collection calculation parameters, system protection and optimization can be can be modified in advanced (Men Domain) mode.

Mode Operation

SENSOR Selects sensor type

SGUARD Protects system from overheating and frost

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