Lift-master 90 E2 User Manual

E2 Wiring Type (K-Line Operators)

WARNING

CONVERSION INSTRUCTIONS

SINGLE PHASE MODELS: T, GT, J, H, GH, SD, GSD

Instructions to convert a single phase standard control box with type C2 / B2 control wiring to type E2 control wiring

Type E2 wiring Function: Constant pressure is required on the close button, if a close button

is released before the door is fully closed the door will return to open position. Use of a safety edge will allow you to override close button. A single button to open and close cannot be used.

Packing List:

PART NUMBER

75-12480 82-PX08-04T 95-GY18-33 95-GY18-36

LIMIT SWITCH BRACKET ASSEMBLY SCREW, #8-32 x 1/4” LONG PAN HEAD PHILLIPS WIRE, 18GA. GRAY 18”, 3/16 FASTON x 3/16 FASTON

WIRE, 18GA. GRAY 18”, 3/16 FASTON x 1/4 FORK

DESCRIPTION

INSTALLATION INSTRUCTIONS

NOTE: Before you start modification, test all operator functions, then disconnect power.

1. Locate the auxiliary open limit switch with three wires (on back wall of electrical box). Remove the switch and all three wires (orange from terminal one, purple from terminal two and yellow from terminal seven) and discard.

2. Locate the R1 relay (24VAC relay with six wires). Remove the two orange wires (one from terminal three and one from terminal seven) and discard.

3. Locate the external radio strip and remove one orange wire going from “R1” to terminal #3 and discard wire. Remove one yellow wire going from “R2” to terminal #7 and discard.

QUANTITY

1 2

1 1

WARNING

Disconnect power to the operator(s) before making control wiring modification.

Be sure to adjust bracket so limit nut will actuate switch in passing, this will be the roll back switch (refer to figure 1).

8. Install a new grey wire from terminal #10 to the normally closed on the roll back switch. Install another grey wire from the common on the roll back switch to the coil of the (R1) relay were the red wire was removed in step 6.

NOTE: Be sure to leave 2 red wires on “R3” radio block intact.

4. Move red wire from terminal three to terminal two.

5. Move gray wire from terminal ten to terminal three.

6. Locate the (R1) relay (see step two). Remove the red wire connecting terminal one and coil of (R1) relay and discard.

NOTE: Be sure to remove wire going to terminal #1 not terminal “R3” on radio block.

7. Install new bracket and limit switch with hardware supplied.

9. Test unit. Remember if unit is not fully closed it will run open as soon as power is applied. Fine tune roll back switch to turn off roll back features just as the close limit turns off contactor.

10. If no stop button is used, provide jumper between terminals three an four.

11. Leave limit nuts spread far apart for very short door travel. This will insure electrician won’t damage door when he applies power to unit.

NOTE: For additional help with the wiring described above, refer to the schematic diagram on page two of the instructions.

E2 SCHEMATIC DIAGRAM

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

FIGURE 1

ROLL BACK SWITCH BRACKET ASSEMBLY