Thermo Products USDT 2004B - Manual (Page 6)

6
ower Connections: A small blade screwdriver may be used to fasten miniaturized
terminal block screws while the corresponding wire is inserted.
NOTE 1: Always disconnect the controller from the power supply before opening the
housing.
NOTE 2: The controller should be properly grounded. Flexible wires, 18/3 AWG
(gauge/conductor) simplify connection to the terminals. The power terminal block will
accommodate wire sizes up to 14 AWG. All connections should be secured and adequately
tightened, as loose power connections will over-heat, and may cause fire.
NOTE 3: It is important that the specified output loads (245 Watts) are not exceeded. Where
these loads expect to exceed, external relays must be used. It is good practice to install a switch
to disconnect the controller and pump from power. Always keep power cables away from sensor
cables and other low voltage signal cables.
NOTE 4: To protect against lightning damage, the system must be grounded according local
regulation. Sensor failures due to the weather or electrostatic are mostly due to poor grounding.
OPERATION OF
DIGITAL DISPLAY
our controller displays information one request at a time. The unit display window has
three lines to inform you about the system's status, unit of displayed parameter and
its value.
Upper Line Display Symbolic display of sensor location, reading unit, and operation domain
Center Line Display
Sensor ID and its reading in normal mode (user interface window)
Lower Line Display
Set-point indicator that illuminates only during programming mode
ð Push selection key once to move to the next selection; or increase the selected
parameter by one unit while display is blinking.
ï Push selection key once to move to the previous selection; or decrease the selected
parameter by one unit while display is blinking.
P
Y
Y