Lift-master 71 909206 3 User Manual

APPLICATION

This modification is standard on model GH-300. Not for use with solid state logic control boards (L).

• The operator must have C2/B2 wiring (not for medium duty operators).

• Recommended for heavy doors and where frequent reversing may be expected due to high usage.

FUNCTIONS

Modifies the operator control circuit so the the door must stop for one second before reversing, in either direction. This delay allows the door and operator to come to a more complete stop than would happen if there was no delay.

• Prevents shock loading of the door and operator especially if a safety device or other open override is activated during closing, resulting in a longer life of the operator.

• This delay has no effect on starting an operator that has been stopped for longer than 2 seconds.

PREPARATION

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

DESCRIPTION QTY

Delay-on-reverse instruction sheet 1 Wiring diagram 1 Relay, 24VDC coil, DPDT 1 Wire ties 5 Auxilary contact block, 1NO & 1NC 2 Time delay assembly 1 Pan head phillips screw, #6-32 x 3/8" 2 #6 Tinnerman 2 Orange wire, 10" 18GA. 3/16" faston x 1/4" fork 1 Orange wire, 4-1/2" 18GA. 1/4" fork x 1/4" fork 1 Purple wire, 10" 18GA. 3/16" faston x 1/4" fork 1 Red wire, 16" 18GA. 3/16" faston x .110" faston 1 Yellow wire, 14" 18GA. 3/16" faston x .110" faston 1 Yellow wire, 4-1/2" 18GA. 1/4" fork X 1/4" fork 1 Yellow wire 9" 18GA. 1/4" fork x 1/4" fork 1

DELAY-ON-REVERSE 3 PH

MODIFICATION

K-LINE71-909206-3 MODELS T, GT, J, H, GH, SD & GSD

STANDARD DOOR OPERATORS WITH 24V CONTROL CIRCUITS

PACKING LIST

5. Locate the purple wire that connects terminal 2 to terminal 14 on the closed side of the contactor. Remove this wire from the operator.

Install a new purple wire from terminal 2 to the second common on the TD relay. Connect a new red wire from the normally closed (NC) on the TD to terminal 14 on close side of contactor where the purple wire was removed.

6. Use a yellow wire to connect terminal 5 to terminal 53 on the auxiliary open contact block. Use a yellow jumper wire to connect 53 on the auxiliary open contact block to 53 on the auxiliary close contact block.

7. Plug the delay assembly on to the two coil prongs of the TD relay. It does not matter which connector is on which prong. Locate the wire nut coming off the yellow wire from the transformer and add the white wire from this assembly into the wire nut with the four wires that are already in the assembly.

8. Connect the orange wire from the delay assembly to 54 on the auxiliary open contact block. Use an orange jumper wire to connect 54 on the the auxiliary open contact to 54 on the auxiliary close contact (figure 1).

9. Reconnect power to operator.

1. Disconnect power.

2. Install the auxiliary contact blocks on top of the reversing contactor. These blocks install by sliding them into slots from the odd numbered side towards the even numbered side. When they are fully on they will click into place and will not slide off without pressing the release lever, a small screwdriver may be needed to press it in. If any wires were pushed aside during installation be sure to separate them so that wires on adjacent prongs do not touch.

3. Install the 24VDC, DPDT relay provided using existing holes in the electrical box on the side of the box nearest terminals L1, L2 and L3. This is the TD relay.

4. Locate the orange wire that goes from terminal 1 on the terminal block to prong 13 on the open half of the contactor. Remove this wire from the operator. Install a new orange wire from terminal 1 to one common (C) prong on the TD relay. Find the normally closed (NC) prong on the TD relay that goes with this common and connect this NC with a yellow wire to prong 13 on the open half of the contactor where the original wire was removed.

61 62

OPEN

1 2 3 4 5 7 10 L1 L2 L3

Coil

N.C.

N.O.

Assy.

Exisiting

Wire Nut

Figure 1