Lennox LDT Series Information page 17

LINE VOLTAGE IN
TRIP
INDICATION
WINDOW
AMP SETTING
POINTER
AMP SETTING
CONTROL
(BLUE DIAL)
RED TEST
BUTTON
(Push To Test)
LOAD VOLTAGE
OUT
Lift clear cover to adjust relay amp setting according to value given on the blower motor nameplate. Proper relay
amp setting equals motor nameplate FLA X service factor of 1.15 X .95.
Cover must also be lifted to adjust control mode from automatic reset to manual reset (see detail above) and to
Control must be in the manual reset mode to perform a test. Use a pointed object to press the small red test but­
ton. A yellow marker should appear in the trip indication window to the right of the amp setting control. Press the
The red STOP button opens the normally closed contacts which power the blower motor. This button stops blower
Adjust relay amp setting according to value given on the blower motor nameplate. Proper relay amp setting equals
Use small slotted screwdriver to adjust control mode from automatic reset (A) to manual reset (H).
Control must be in the manual reset mode (H) to perform a test. Press the red test button. Green trip indicator
should pop out. Press the blue reset screw to reset the relay.
CLEAR
COVER
(SHOWN
CLOSED)
STOP
BUTTON
(RED)
BLUE RESET SCREW
(Shown in AUTO position as
shipped from the factory)
test the control.
blue reset screw to reset the relay.
motor operation as long as it is pressed in.
FIGURE 5
SIEMENS OVERLOAD RELAY
BLUE RESET BUTTON IN
FACTORY‐SET AUTO MODE
(Turn clockwise to H for
AMP ADJUSTMENT DIAL
motor nameplate FLA X service factor of 1.15 X .95.
FIGURE 6
Page 17
TELEMECANIQUE OVERLOAD RELAY
DETAIL SHOWING RESET BUTTON
ADJUSTED TO MANUAL POSITION
Lift clear cover and turn adjustment screw
counterclockwise. Reset screw will pop out
when pointer is in M (manual position). Close
cover to lock reset screw into position.
manual reset)
GREEN TRIP INDICATOR
(Flush with surface -- not tripped;
Above surface -- tripped)
RED TEST BUT­
TON