Owner manual

(Reference Figures 1 thru 4)

COUNTERWEIGHT SENSING SWITCH

This kit has been shipped loose to be field mounted, wired, and adjusted per the

procedures 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 supplied per lift to be

mounted to one of the mast beams (typically Left) near the top of the counterweight

tube.

2. Assemble the sensing switch as shown in Figure 1. The switch is to be wired

normally closed – tripped open.

a. Mount the switch body to the counterweight tube as shown:

i. Use Figures 2a and 2b – if the lift was installed prior to 11/2006

and/or there is no sensing switch mounting plate pre-welded to the

top of the counterweight tube. Use the switch body as a template

in the position shown, mark the hole position, and drill and tap as

instructed to mount the switch with the hardware provided.

ii. Use Figure 3 – if the lift was purchased in 11/2006 or later and/or

there is already a sensing switch mounting plate pre-welded to the

top of the counterweight tube. Mount the switch body as shown

with the hardware provided.

b. Slide and/or rotate the sensing 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 1)

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, a qualified electrician should, while referencing

the lift’s electrical schematic, wire the sensing switch into the circuit:

INSTALLATION INSTRUCTIONS

PAGE 1
INSTALLATION INSTRUCTIONS COUNTERWEIGHT SENSING SWITCH (Reference Figures 1 thru 4) This kit has been shipped loose to be field mounted, wired, and adjusted per the procedures 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.
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INSTALLATION INSTRUCTIONS a. Use Figure 4 if the unit was installed prior to 11/2006 (or if not already done). b. For units installed after 11/2006, please refer to your order specific electrical schematic for wiring details. The counterweight sensing switch will be shown as “CW1”. 5. The switch should then be tested to make sure it is adjusted and set correctly. Test the electrical continuity of the sensing switch inside the lift’s motor control panel to make sure that: a.
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INSTALLATION INSTRUCTIONS Figure 2a.
PAGE 4
INSTALLATION INSTRUCTIONS Figure 2b.
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INSTALLATION INSTRUCTIONS SENSING SWITCH MOUNTING PLATE SENSING SWITCH BODY SENSING SWITCH ARM COUNTERWEIGHT TUBE SENSING SWITCH ARM COUNTERWEIGHT COUNTERWEIGHT TUBE MOUNTING PLATE TOP VIEW ISOMETRIC VIEW Figure 3.
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INSTALLATION INSTRUCTIONS NOTE: If the unit was installed prior to 11/2006 use this diagram to add the counterweight sensor into the electrical circuit. Figure 4.