Thermo Products USDT2004 - Manual (Page 10)

10
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.
dvanced Mode – 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
A