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Installation and Maintenance Manual
Barrier Gate Operator
Models BG770 & BG790
Doc 01-G0674
Rev E
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2 Contents Contents General Product Information _______________________________________________ 4 Specifications _______________________________________________________________________ 4 Safety Instructions ________________________________________________________ 6 Before Installation____________________________________________________________________ 6 During Installation____________________________________________________________________ 6 After Installation _________________________
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Contents 3 Required Maintenance-Normal Usage_____________________________26_Toc509797299 BG770 Drawing and Parts List______________________________________________ 27 BG770 Exploded View _______________________________________________________________ 27 BG770 Parts List ____________________________________________________________________ 28 BG790 Drawing and Parts List______________________________________________ 29 BG790 Exploded View __________________________________________________
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General Product Information 4 General Product Information Specifications Specifications are for both model BG770 and model BG790 unless otherwise noted. MODEL BG770 POWER Line voltage is designated by third suffix of gate part number. For amp draw, see motor nameplate. -11; 115VAC, 1 Phase, 60Hz -21; 230VAC, 1 Phase, 60Hz TYPICAL -81; 208VAC, 1 Phase, 60Hz INSTALLATION -83; 208VAC, 3 Phase, 60Hz -23; 230VAC, 3 Phase. 60Hz -43; 460VAC, 3 Phase, 60Hz 17 17 -53; 575VAC, 3
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General Product Information 5 OPERATION Prewired terminal strip accepts field connection of any access control device with normally open (N.O.) output contact (most access control equipment) and when required, a separate OPEN/CLOSE pushbutton (supplied). Plug-in connectors are included for addition of a loop detector to open and/or a loop detector to hold open (not supplied). Activation of access device open button, or loop detector to open will raise gate. Gate will lower automatica
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Safety Instructions 6 Safety Instructions WARNING To reduce the risk of injury or death, it is important to read all safety instructions. These safety instructions have been prepared by LiftMaster, the manufacturer of the barrier gate. As the manufacturer of only part of the total barrier gate system, we do not know what type of controls or safety equipment that has been selected as part of your system. An automatic vehicular gate arm is a large, heavy object that moves with the
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Safety Instructions 7 After Installation ! Be sure that the operator, controls, and safety devices have been tested and are functioning properly. ! Review the operation of the gate and safety equipment with the owner or end user. Be sure that the end user is aware of all safety instructions and hazards of the operating system. ! Inform the owner or end user that the barrier gate and all control and safety equipment should be maintained regularly. The entire gate system should be chec
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Preparing the Installation 8 Preparing the Installation Unpack Carton 1 Unpack the carton, checking for possible damage during shipping. The arm (when supplied) 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. MODEL BG770 PACKING LIST PART NUMBER DESCRIPTION QUANTITY 02-102 OPEN/CL
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Preparing the Installation 9 Preparing the Site 1 Be sure that selected gate location has required clearance for arm movement (and counterweights on model BG790). Refer to the dimensional drawings, Figure 1 and Figure 2 on page 4. 2 Run electrical power to the site according to local electrical codes. See Table 3 below for correct wire size and length of run (see also Figure 3). If the wire gauge is too high (wire too small) or the run is too long, the gate may not run properly or m
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Preparing the Installation 10 Preparing the Operator CAUTION Never open electrical cabinet cover unless power is off. Electrical shock and serious injury could result. 1 Remove the wood base from the unit and discard. 2 Locate the keys for the access panel (taped to the arm mounting flange) and remove. 3 Open the side access panel and check the position of the power ON/OFF switch. 4 Open the cover of the electrical cabinet and be sure that the AUTO/MANUAL switch is in the "AUTO" p
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Installation 11 Installation Step 1: Mounting 1 Layout the concrete pad as detailed in Figure 4. 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 Locate four 1/2" X 6" long L-bolts (not supplied) as shown in Figure 4. The L-bolts should protrude 1 1/2" inches above the pad. 4 Pour concrete, insuring that the pad is level and above the grou
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Installation 12 Step 2: Arm Fabrication MODEL BG770 (SINGLE ARM) If you are making the arm yourself, refer to Figure 5 and its suggestions for the single arm design. 1 Drill four 1/2" diameter holes using the arm clamp as a template. Tapering the wood as shown helps reduce the weight and allows you to reduce any warping common with long lengths of lumber. 2 Finish arm with exterior grade paint and stripe with paint or adhesive backed tape as required. 3 Length as Needed up to 12 f
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Installation 13 Step 3: Wiring Connections Locate the electrical enclosure inside the cabinet. The enclosure (shipped loose) may be removed from the cabinet to help in the connections described below. When all connections are complete, hang the enclosure as described in step 7. WARNING Consult local electrical codes for permanent wiring requirements at you installation site. 1 Open the cover of the electrical enclosure. Refer to the wiring diagram supplied inside for all electrical
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Installation 14 Step 4: Arm Attachment 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. WARNING 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
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Installation 15 BG790: WISHBONE COUNTERWEIGHTED ARM Attach left and right arms to the arm hub flanges as shown and described below. 1 Bolt counterweights to ends of arms clamps as shown. Use Caution lifting 57lb. weights. 2 Bend and fasten the two arms together as shown in Figure 10. If an extension arm is required, sandwich the extension arm between the two halves of the wishbone arm before bolting together. See Arm Fabrication starting on page 12 for extension arm preparation.
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Installation 16 Step 5: Arm and Turnbuckle Shaft Adjustments CAUTION Turn off power before making any adjustments. 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 (see Figure 11). 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
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Installation 17 MODEL BG790 ADJUSTMENTS 1 If necessary, rotate the pulley on the motor by hand until the upper and lower cranks are in a vertical position (see Figure 13). This is the lowest point of travel and should be preset in this position at the factory. 2 If the arm is not level, loosen the jam nuts on both the top and bottom end of the turnbuckle shaft. 3 Rotate the shaft either CW or CCW as necessary until the gate arm is in the desired horizontal position. NOTE: While the a
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Installation 18 Step 6: Limit Switch Adjustments Open Limit Switch Close Limit Switch Auxiliary Close Limit Switch OPEN Direction CLOSE Direction 01-G0674F16 Figure 14: Limit Switch Layout CLOSE LIMIT SWITCH The CLOSE limit switch is preset at the factory. If you rotated the pulley in section Arm and Turnbuckle Shaft Adjustments (page 16), you will need to reset the cam on the CLOSE limit switch. 1 Back out the set screw on the cam. Then rotate the cam in the close direction so that
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Optional Accessories 19 Optional Accessories CAUTION Turn off power before working inside gate enclosure. Vehicle Detectors 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. FACTORY SUPPLIED PLUG-IN DETECTORS
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Installation 20 Card Readers, Keypads, or other Almost all types of access control devices may be connected to models BG770 and BG790. More than one device may be connected in parallel. All devices connected according to the instructions below will open the gate and reverse the gate if it is closing. MOUNTING LOCATION Mount or install the access control device within sight of the gate and according to the instructions supplied with the device. Some devices require their own power s
