LiftMaster BG770 Support Question
LiftMaster BG770 Support Question
Find answers below for this question about LiftMaster BG770.Need a LiftMaster BG770 manual? We have 1 online manual for this item!
Question posted by jcarcano on January 5th, 2012
Replacing Motor On Model Bg770-50-11 Barrier Gate Operator Needs To Be Reversibl
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Current Answers
Related LiftMaster BG770 Manual Pages
BG790 Manual - Page 1
OWNER'S MANUAL
MODELS BG770 & BG790
VEHICULAR BARRIER GATE OPERATOR
MODELS BG770 AND BG790 ARE FOR VEHICULAR PASSAGE GATES ONLY AND ARE NOT INTENDED FOR PEDESTRIAN PASSAGE GATE USE
BG790 Manual - Page 2
... Card Readers, Keypads or Other 12 Mounting Location 12
OPERATING INSTRUCTIONS
Electrical Operation 13 Manual Operation 13
TROUBLESHOOTING
Power 14 Accessories 14 Primary Voltage Circuit 15 Low Voltage Circuit 15 General Reference Information 15
REPAIR PARTS
Illustrated Parts - Read the warnings carefully. Model BG770 17 Illustrated Parts - These instructions are intended to...
BG790 Manual - Page 3
..., operate in vertical position. Activation of gate part number.
Not affected by third suffix of access device open button, or loop detector to 24'
DIMENSIONS
22"
44" 35"
Typical Installation
Typical Installation
3
Low temperature gear oil normally never needs replacement. Horsepower is designated by second suffix of motor.
MOUNTING Pad mount
Model BG770
17...
BG790 Manual - Page 4
... take into account the possible hazards associated with a separate access opening. Install the gate operator only when:
a. b. All exposed pinch points are not obstructed or impeded by a moving gate or barrier.
12. The pedestrian access opening and closing to prevent unauthorized use conditions. Locate the gate such that persons will not come in its function as a component...
BG790 Manual - Page 5
...needed (such as loop wires, card readers, ticket spitters, pushbuttons, etc.).
OPERATOR PREPARATION
1. PREPARATIONS
CARTON INVENTORY
1. Unpack the carton, checking for control equipment and run is in the "AUTO" position. Refer to supply the gate. MODEL BG770 PACKING LIST
PART NUMBER DESCRIPTION
QTY
02-102
Open... 3/8
8
85-FW-50
Flat Washer, 1/2
8
85-LS-50
Split Lock Washer, ...
BG790 Manual - Page 6
... concrete to Calculate Arm Length below .
3. Secure operator with paint or adhesive backed tape as required.
12"
3" Length as needed up to 12'
Material: 6: x 1" Pine ...as standard with every BG790 gate. Cut to Calculate Arm Length below .
2. Refer to desired length.
Figure 3
MODEL BG790 (WISHBONE ARM)
... 22"
ARM FABRICATION
MODEL BG770 (SINGLE ARM)
If you to ceiling
CALCULATE ARM LENGTH
...
BG790 Manual - Page 7
... gate to control the gate manually. A 2-button control station (OPEN/...operator.
• A ground screw is provided as described in step 7.
1. The BG770 and BG790 barrier gates will mount the control station outdoors, replace the standard station supplied with the operator...reversing edge BEFORE proceeding with every BG770 and BG790 barrier gate.
MODEL BG770: Hang electrical enclosure on the ...
BG790 Manual - Page 8
MODEL BG770: OPTIONAL ARM Attach arm to DISCONNECT power while installing the arm attachment. Keep hands and tools out of the gate cabinet and away from underneath, inside the cabinet.
Be sure to the arm hub flange (Figure 6). WARNING
When following the procedure below, the motor belt will turn and the drive shaft will move...
BG790 Manual - Page 9
... Arc of arm. Bolt counterweights to DISCONNECT power while installing the arm attachment. INSTALLATION
MODEL BG790: WISHBONE COUNTERWEIGHTED ARM
1. Refer to start when you turn and the drive shaft will turn ...the two halves of the gate cabinet and away from the belt and drive shaft or SERIOUS INJURY may result. WARNING
When following the procedure below, the motor belt will move during ...
BG790 Manual - Page 10
...level, loosen the jam nuts on the motor by hand until the gate arm is not level, loosen the jam nuts at the factory. 2. MODEL BG770 TURNBUCKLE SHAFT ALIGNMENT If necessary, align turnbuckle...11
Jam Nut
Lower Crank Arm in Closed Position
See Note
Pulley
Turnbuckle Shaft
Upper Crank Arm in the desired horizontal position. If necessary, rotate the pulley on the motor by hand until the gate...
BG790 Manual - Page 11
...the switch is activated when the gate arm is in the desired position, retighten the set screw on the cam. OPEN LIMIT SWITCH
The OPEN limit switch is preset at the factory. If you will need to be fine tuned after ...
This adjustment may have to adjust the cam on the CLOSE limit switch.
1. OPEN Direction CLOSE Direction
11
When the gate arm is preset at the factory.
BG790 Manual - Page 12
...with the gate and with both model BG770 and BG790.
More than one detector may connect to the instructions on the wiring diagram. OPEN LOOP DETECTOR 1. HOLD OPEN LOOP ...gate and the access device.
12
Use a wiring method that will need a separate power source. Plug the harness into the connector marked "HOLD OPEN." 2. If the receiver is closing.
A standard residential door...
BG790 Manual - Page 13
...
The motor is located on the right side of the two button control station, or by itself when the overload is too hot. MANUAL OPERATION
ACCESS CONTROL "EMERGENCY" BYPASS
To open the gate in the up position, and no other control device will start by other means if provided. OPERATING INSTRUCTIONS
ELECTRICAL OPERATION
The BG770 and BG790 barrier gate operators...
BG790 Manual - Page 15
... open and one side of the power disconnect switch? To activate the motor in the controller (Model BG770 uses a manual reset overload). Check secondary output of all of the contactor. now press down on 2. It is the circuit breaker. Please when calling for assistance, make sure you have a bad power disconnect and it be replaced...
BG790 Manual - Page 17
... Spacer Barrier Gate Gear Reducer...Motor
1
20-1050B-2P 1/2HP - 115/208/230Vac - 10-60Hz
8
Used on: BG770-50-11,
1
BG770-50-21, BG770-50-81
1
20-3050B-4E 1/2HP - 208/230/460Vac - 30-60Hz
1
Used on: BG770-50-23,
1
BG770-50-43, BG770-50-83
6
20-3050M-5 1/2HP - 575Vac - 30-60Hz
12
Used on: BG770-50-53
4
47 24-XXX-X Relay
1
24-115-1 115Vac Relay
1
Used on: All 115Vac, 10 Models...
BG790 Manual - Page 19
...Limit Collar
4
Open/Close Key Switch
1
DIN Rail
1
Electrical Panel Hanger Kit
1
Intermediate Shaft
1
Metal Gasket
14
Rubber Grommet
2
#50 Chain
1
#50 Chain Master Link
1
#50 Chain Half ...Motor
1
20-1050B-2P 1/2HP - 115/208/230Vac - 10-60Hz
Used on: BG790-50-11,
BG790-50-21, BG790-50-81
20-3050B-4E 1/2HP - 208/230/460Vac - 30-60Hz
Used on: BG790-50-23,
BG790-50-43, BG790-50...
BG790 Manual - Page 20
... tightness Inspect for wear or damage Check all for proper operation Inspect all wire connections Check for tightness Inspect for vehicles ONLY. Motor and shaft bearing normally should never need replacement. GREASE TURNBUCKLE
Periodically grease the ball ends of the turnbuckle, depending on contact with gate controls. ALWAYS keep people and objects away from children...
BG790 Manual - Page 21
... power BEFORE installing
or servicing operator. • Replace ONLY with fuse of same type
of 2)
MOTOR CONNECTION SAME AS INCOMING POWER. APPLICATIONS: CONTROL WIRING TYPE L2
MODEL TYPES:
FIELD WIRING
BG770, BG790
HORSEPOWER: VOLTAGE/PHASE:...
CLOSE IS USED. 2) REMOVE JUMPER TO CAUSE GATE
ARM TO CLOSE IMMEDIATELY UNLESS HOLD OPEN LOOP IS ACTIVATED.
(OR)
OP 56 1 CL 2
(1 of rating.
BG790 Manual - Page 22
...)
(BK)
J3-7
(BK) J4-7
24V OPEN LOOP
(R)
24V HOLD OPEN LOOP
J3-8
(R) J4-8
(OPTIONAL EQUIPMENT)
NOTES:
1) TRANSFORMER PRIMARY VOLTAGE SAME AS OPERATOR LINE VOLTAGE 24V SECONDARY
2) WE RECOMMEND USING A DEDICATED CIRCUIT BREAKER FOR EACH OPERATOR.
1
APPLICATIONS: CONTROL WIRING TYPE
FIELD WIRING & ADJUSTMENTS
MODEL TYPES: HORSEPOWER: VOLTAGE/PHASE:
BG770 (PG) BG790 (HBG) 1/2 208/230/480...
BG790 Manual - Page 24
... be repaired or replaced with the instructions regarding installation, operation, maintenance and testing. Defective parts will be repaired or replaced (at Seller's sole option) at Seller's sole option. THIS LIMITED WARRANTY DOES NOT COVER ANY PROBLEMS WITH, OR RELATING TO, THE GATE OR GATE HARDWARE, INCLUDING BUT NOT LIMITED TO THE GATE ALIGNMENT OR HINGES. ANY...
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