OWNER’S MANUAL MODELS BG770 & BG790 V E H I C U L A R B A R R I E R G AT E O P E R AT O R MODELS BG770 AND BG790 ARE FOR VEHICULAR PASSAGE GATES ONLY AND ARE NOT INTENDED FOR PEDESTRIAN PASSAGE GATE USE
TABLE OF CONTENTS SPECIFICATIONS IMPORTANT NOTES Operator Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Operator Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 • BEFORE attempting to install, operate or maintain the operator, you MUST read and fully understand this manual and follow all safety instructions. • These instructions are intended to highlight certain safety related issues.
S P E C I F I C AT I O N S MOTOR ELECTRICAL OVERLOAD PROTECTION Automatic reset (3 phase operators) or manual reset (1 phase operators) thermal overload. Squirrel cage induction type (3 phase) or capacitor start induction type (1 phase), continuous duty, 1725 RPM. Horsepower is designated by second suffix of operator part number. -50; 1/2 Horsepower ELECTRICAL BOX NEMA 1 general purpose painted steel enclosure, contains all motor control equipment. Enclosure removable from operator.
O P E R AT O R WA R N I N G S SAFETY INSTALLATION INFORMATION 1. Vehicular gate systems provide convenience and security. Gate systems are comprised of many component parts. The gate operator is only one component. Each gate system is specifically designed for an individual application. 2. Gate operating system designers, installers and users must take into account the possible hazards associated with each individual application.
P R E PA R AT I O N CARTON INVENTORY WARNING 1. Unpack the carton, checking for possible damage during shipping. The arm (when provided) is packed separately. Damage claims MUST be filed with the freight carrier. 2. Check that the nameplate data (inside service cover) accurately matches the operator that was ordered. 3. Verify that the following parts are included with the standard unit. To reduce the risk of SEVERE INJURY or DEATH, disconnect power BEFORE performing ANY adjustments.
I N S TA L L AT I O N Figure 2 PAD MOUNTING 1. Layout the concrete pad (Figure 2). Be sure to locate electrical conduit inside the hatched 14" x 13" area. 2. Excavate required area for pad and conduit. Pad depth should be below the frost line or as required by local codes. 3. Pour concrete pad. Concrete pad should be level and above the ground line. 4. Allow the concrete to set at least two days before installing operator. 5. Secure operator with four concrete anchors (not provided).
NING I N S TWARNING A L L AT I O N ION WARNING To reduce the risk of SEVERE INJURY or DEATH: • ANY maintenance to the operator or in the area near the operator MUST not be performed until disconnecting the electrical power and locking-out the power via the operator power switch. Upon completion of maintenance the area MUST be cleared and secured, at that time the unit may be returned to service. • Disconnecting power at the fuse box BEFORE proceeding.
I N S TA L L AT I O N ARM ATTACHMENT WARNING For easier access during installation, the top cover of the unit may be opened by removing the two wing nuts from underneath, inside the cabinet. When following the procedure below, the motor belt will turn and the drive shaft will move during some of the steps. Keep hands and tools out of the gate cabinet and away from the belt and drive shaft or SERIOUS INJURY may result. Be sure to DISCONNECT power while installing the arm attachment.
I N S TA L L AT I O N MODEL BG790: WISHBONE COUNTERWEIGHTED ARM 1. Bolt counterweights to ends of arms clamps (Figure 7). Use caution lifting 57 lb. weights. 2. Bend and fasten the two arms together (Figure 8). If an extension arm is required, sandwich the extension arm between the two halves of the wishbone arm before bolting together. Refer to Arm Fabrication on page 6 for extension arm preparation. 3. Assemble the two 3/8" threaded rods to the arms for center support. 4.
I N S TA L L AT I O N ARM AND TURNBUCKLE SHAFT ADJUSTMENTS WARNING CAUTION MODEL BG770 ADJUSTMENTS 1. If necessary, rotate the pulley on the motor by hand until the crank arm on the gear reducer is perfectly aligned with the turnbuckle shaft (Figure 9). This is the lowest point of the arm travel and should be preset in this position at the factory. 2. If the arm is not level, loosen the jam nuts at both ends of the turnbuckle shaft Insert a screwdriver or other similar tool into the hole in the shaft.
I N S TA L L AT I O N LIMIT SWITCH ADJUSTMENTS Figure 12 CLOSE LIMIT SWITCH The CLOSE limit switch is preset at the factory. If you rotated the pulley in section Arm and Turnbuckle Shaft Adjustments, you will need to reset the cam on the CLOSE limit switch. 1. Loosen the set screw on the cam. Then rotate the cam in the close direction so that the switch is activated when the gate arm is in its lowest position (Figure 12). 2. When the cam is in the desired position, retighten the set screw.
O P T I O N A L A C C E S S O R I EWARNING S VEHICLE DETECTORS CAUTION Almost all types of vehicle detectors may be used in conjunction with both model BG770 and BG790. More than one detector may be connected to the gate, and may be mounted inside of the cabinet. Connect the detector(s) according to the instructions on the wiring diagrams supplied with the gate and with the detector itself. Turn off power BEFORE working inside gate enclosure.
O P E R A T I N G I N S T R U C T I OWARNING NS ELECTRICAL OPERATION CAUTION The BG770 and BG790 barrier gate operators are designed to provide years of trouble-free operation. The gate may be operated by means of the two button control station, or by other means if provided. Keep hands clear of moving parts. The motor will start when AUTO/MANUAL switch is flipped to the “MANUAL” position. ON/OFF POWER SWITCH The gate is provided with an ON/OFF power switch.
TROUBLESHOOTING When troubleshooting, one of the first things to do is try to isolate the problem area. The four (4) main areas to check out are: • Power • Accessories • Operator’s Primary Voltage • Operator’s Low Voltage ACCESSORIES Add-on accessories can create many of the problems that are credited to the operator. Many applications have more than one accessory item attached to the operator and some of these items even draw their power from the operator.
TROUBLESHOOTING Figure 13 PRIMARY VOLTAGE CIRCUIT Use extreme caution when troubleshooting the primary voltage circuit! There are five (5) items in this circuit that could be causing trouble, and they are: • Motor • Transformer • Contactor (Figure 13) • Power Disconnect Switch The first thing to check is the incoming power. Is it there at the incoming side of the power disconnect switch? If there is power, then check for it at the transformer primary terminals.
I L L U S T R AT E D PA R T S - M O D E L B G 7 7 0 10 8 30 43 5 14 22 44 29 38 34 15 35 9 3 17 41 31 45 2 19 4 40 42 16 36 11 39 6 46 27 18 28 20 24 7 37 13 48 9 12 23 33 25 21 26 47 1 32 OPERATOR ASSEMBLY 16
REPAIR PARTS - MODEL BG770 INDIVIDUAL PARTS ITEM PART # 1 03-8024-K 2 07-8003 3 07-8004 4 07-8005 5 07-8007 6 10-3522 7 10-8001-T 8 10-8007-M 9 10-8014 10 10-8016-T 11 10-8017-T 12 10-8021 13 10-8022 14 11-8031 15 12-8032 16 12-8033 17 12-8034 18 16-8001 19 17-2001 20 17-2002 21 21-3260-1 22 23-2017 23 23-2761 24 23-8001 25 24-24-1 26 24-24-6 27 28-3000 28 28-8003 29 31-10-17 30 31-2712 31 32-8002 32 42-110 33 42-110-2 34 65-1209 35 80-1003 36 80-575 37 80-8001 38 82-HN52-18 39 82-HN75-28 40 84-JH-76 41 84-
I L L U S T R AT E D PA R T S - M O D E L B G 7 9 0 12 33 7 14 2 34 2 33 41 4 40 34 15 12 3 28 13 14 29 42 44 25 45 40 39 43 16 44 23 38 5 8 45 44 14 10 17 35 46 37 18 30 14 36 47 20 19 21 6 24 32 11 9 49 1 22 31 26 OPERATOR ASSEMBLY (WISHBONE ARM NOT SHOWN) 32 27 48 18
REPAIR PARTS - MODEL BG790 INDIVIDUAL PARTS ITEM PART # 1 03-8024-K 2 07-8007 3 07-8058 4 07-8063 5 07-8064 6 10-8014 7 10-8016-T 8 10-8017-T 9 10-8021 10 10-8026 11 10-8051-T 12 10-8055 13 11-8061 14 12-8032 15 12-8033 16 12-8034 17 15-5032 18 15-9020 19 16-8002 20 17-2001 21 17-2002 22 21-3260-1 23 23-2017 24 23-2761 25 23-8001 26 24-24-1 27 24-24-6 28 28-3000 29 28-8003 30 32-8002 31 42-110-2 32 42-3608 33 65-1208 34 65-8056 35 80-1003 36 80-207-36 37 80-8001 38 82-HN52-18 39 82-HN52-20 40 82-HN75-26 41
MAINTENANCE NING WARNING IMPORTANT SAFETY INSTRUCTIONS ON WARNING To reduce the risk of SEVERE INJURY or DEATH: 1. READ AND FOLLOW ALL INSTRUCTIONS. 2. NEVER let children operate or play with gate controls. Keep the remote control away from children. 3. ALWAYS keep people and objects away from the gate. NO ONE SHOULD CROSS THE PATH OF THE MOVING GATE. 4. Test the gate operator monthly. The gate MUST reverse on contact with a rigid object or stop when an object activates the non-contact sensors.
WIRING DIAGRAM (GN) , . (W) (BK) O/L SEE NOTE 4 115V AC C ESSORIES O/L SEE NOTE 4 NOTES: APPLICATIONS: 1) TRANSFORMER PRIMARY VOLTAGE SAME AS OPERATOR LINE VOLTAGE 24V SECONDARY. CONTROL WIRING TYPE L2 FIELD WIRING 2) RELAY COIL VOLTAGE SAME AS OPERATOR LINE VOLTAGE. 3) WE RECOMMEND USING A DEDICATED CIRCUIT BREAKER FOR EACH OPERATOR. MODEL TYPES: HORSEPOWER: VOLTAGE/PHASE: 4) BROWN WIRES INSIDE MOTOR NOT USED, SHOULD BE WIRE NUTTED.
WIRING DIAGRAM 208/230V 115V AC C ESSORIES NOTES: APPLICATIONS: 1) TRANSFORMER PRIMARY VOLTAGE SAME AS OPERATOR LINE VOLTAGE 24V SECONDARY. CONTROL WIRING TYPE L2 FIELD WIRING 2) WE RECOMMEND USING A DEDICATED CIRCUIT BREAKER FOR EACH OPERATOR.
CONTROL CONNECTION DIAGRAM IT IS IMPORTANT TO READ ALL SAFETY RULES INCLUDED IN THE INSTALLATION MANUAL BEFORE BEGINNING INSTALLATION. FAILURE TO COMPLY WITH THE SAFETY INSTRUCTIONS MAY RESULT IN SERIOUS PERSONAL INJURY OR PROPERTY DAMAGE.
WARRANTY POLICY AND SERVICE LIFTMASTER® ONE YEAR LIMITED WARRANTY The Chamberlain Group, Inc. warrants to the final purchaser of this product, for the structure in which this product is originally installed, that it is free from defect in materials and/or workmanship for a period of one year from the date of purchase. The proper operation of this product is dependent on your compliance with the instructions regarding installation, operation, maintenance and testing.
