Lift-master 71 909207 User Manual

MID STOP MODIFICATION

WARNING

Mini Limit Switches

71-909207

APPLICATION REQUIREMENTS:

WARNING

This modification is available to models T, GT, APT, J, H, GH, SD and GSD standard door operators with 24V control circuits. Not for use with Solid State Logic Control Board (L).

The operator must have C2/B2 control wiring Not available with Hazardous Area or Variable Speed Modifications. A one button radio control cannot be used. In order to use a radio control you need a 2

channel receiver and transmitter. One channel to open and the other to close.

FUNCTIONS:

Provides capability of stopping the door while opening a pre-set mid position. Constant pressure on the open button will fully open the door (on a very high door the coil

might relatch before fully open but the limit switches will shut it off). The switch will have no effect on the close travel.

TO AVOID SERIOUS PERSONAL INJURY OR DEATH FROM ELECTROCUTION, DISCONNECT ELECTRIC POWER TO OPERATOR BEFORE INSTALLING MID-STOP

ARNING:

If a safety device is used it will only stop the door when it is above the mid-stop.

PREP

ARATION:

Unpack kit to verify the parts listed below are included. Refer to installation instructions on reverse side.

PACKING LIST:

PART NUMBER

01-11602 82-PX08-04T 95-RD10-23 75-12480 10-14179 *01-1179-1 **01-1179-3

*SHIPPED WITH 1O OPERATORS **SHIPPED WITH 3O OPERATORS

MID STOP MODIFICATION INSTRUCTIONS SCREW, #8-32 x 1/4” LG PAN HEAD PHILLIPS SELF TAP WIRE 18GA RED 10” .110 FASTON X .187 FASTON MID STOP SWITCH BRACKET ASSEMBLY AUXILIARY LIMIT SWITCH 1O B2 MID-STOP WIRING DIAGRAM 3O B2 MID-STOP WIRING DIAGRAM

DESCRIPTION

QUANTITY

1 3 1 1 1 1 1

INSTALLATION INSTRUCTIONS

1. Locate the new bracket assembly with the limit switch attached.

2. Before installing the new bracket inside the box you must first run the wires from the top limit switches along side the bracket on the contactor side of the box and run the wires from the bottom limit switches through the cut out in the bracket. Be sure not to pinch wires under the bracket (refer to figure 1). Fasten the bracket down with the (2) screws supplied (refer to figure 2).

3. Locate the yellow wire on terminal #3 and move to terminal #1.

4. Locate the red wire that runs from (R3) on the radio terminal block to the relay coil on the (R1) relay, remove the end connected to the relay coil and tape or cap end so it can’t short out.

5. Install a new red wire from the relay coil (from step

4) to (A2) on the open contactor.

FIGURE 1

6. Locate the yellow wire from common on the auxiliary open limit switch and move to common on the new mid stop switch.

7. Locate the orange wire from normally close on the auxiliary open limit switch and move to normally closed on the new mid stop switch.

8. Adjust bracket (installed in step 2) so limit nut actuates switch in passing..

9. Adjust midstop switch for desired opening height by moving it on bracket.

FIGURE 2

(2) #8-32 X 1/4” LONG PAN HD PHILLIPS SELF TAPING SCREWS

MID STOP SWITCH BRACKET ASSEMBLY

IR RELAY R1 RELAY

TRANSFORMER

MID STOP SWITCH BRACKET ASSEMBLY

RUN WIRES FROM BOTTOM LIMIT SWITCHES THROUGH CUT OUT IN BRACKET.

RUN WIRES FROM TOP LIMIT SWITCHES AROUND OUTSIDE OF BRACKET.

TERMINAL BLOCK

CONTACTOR

RADIO TERMINAL BLOCK

(3) #8-32 X 1/4” LONG PAN HD PHILLIPS SELF TAPING SCREWS

MID STOP SWITCH BRACKET ASSEMBLY

RADIO CONTROL CONFIGURATIONS

It will be necessary to use a two channel Receiver an Transmitter. One channel will be used to open and the other channel will be used to close.

a. If your receiver has terminals 1, 2 and 3 and two separate wires for the second channel connect as follows:

Radio 1 will connect to terminal 3 in the operator, Radio 2 will connect to terminal 1 in the operator, Radio 3 will connect into the wire nut in the operator control box - this wire nut connects a yellow, purple and orange wire. (This channel will open)

b. If your operator has an external radio terminal, radio will only open to mid stop. Connect the wires as follows:

Connect the two wires for the second channel to terminals 3 and 2 of the main terminal strip. (This channel will close).

c. If your receiver has 6 wires (2 for power, 2 for one channel and 2 for second channel) connect wires as follows:

Connect power to terminal 5 and into the wire nut as described in section A. One channel connects to terminals 1 and 3 (to open). The second channel connects to terminals 2 and 3. (This channel will close)