Autoquip FREIGHTLIFT FL4M - Manual (Page 75)

75
M. INSTALLING COUNTERWEIGHT SENSING SWITCH (Reference Figure 39)
Items needed:
Qty
Description
1 Counterweight Sensing Switch Kit
This kit has been shipped loose to be field mounted, wired, and adjusted per the
procedure below. These switches are intended to turn off the motor whenever a
counterweight attempts to come out the top of its guide tube during lift operation.
1. To install the counterweight sensing switch, first gain safe access to the top of the
masts. There is one (1) counterweight sensing switch mounting plate located on
one of the two mast beams near the top as shown.
2. Assemble the sensing switch as shown, the switch is to be wired normally closed –
help open.
a. Mount the switch body to the pre-drilled mounting plate using the
hardware provided
b. Mount the switch arm to the switch body, sliding and rotating the switch
arm so that it is positioned over the counterweight tube as illustrated
c. Tighten the switch arm, rotate upwards and confirm that the switch
contacts open (listen for “click”) at 10-20 degrees of rotation. Adjust as
necessary
NOTE: To change the actuation direction of the switch, remove the switch head. Change
the actuating control knob/mechanism to the desired actuation direction.
(Reference Figure 37)
3. Ensure that the counterweight will in fact make contact with the switch arm as the
counterweight is pulled out the top of the square tube.
4. After installing the sensing switch, it should be tested to make sure it is adjusted and
set correctly. A qualified electrician should, while referencing the lift’s electrical
schematic, test the electrical continuity of the sensing switch inside the lift’s motor
control panel to make sure that:
a. the contacts in the switch are in the closed condition when in the running
position
b. The contacts in the switch are in the open condition when in the
activated/rotated position
INSTALLATION INSTRUCTIONS