LiftMaster Door Lock Hoist/Jackshaft Operator
Door Lock Hoist/Jackshaft (DHJ) operators are designed for heavier commercial doors and grilles, ideal for shopping malls. They feature a floor-level chain hoist for manual operation and a door lock sensor to prevent damage. All LiftMaster operators should be purchased from a Dealer and professionally installed.
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Connectivity
- Door Lock Hoist/Jackshaft (DHJ) operators are designed for heavier commercial doors and grilles, ideal for shopping malls. They feature a floor-level chain hoist for manual operation and a door lock sensor to prevent damage. All LiftMaster operators should be purchased from a Dealer and professionally installed.
Performance
- Dual Voltage Connections: Flexible installation (Single-phase: 115V/230V, Three-phase: 208V/230V/460V).
- Internal Door Lock Sensor: Prevents jamming and damage to door and operator.
- Control Function Selector Dial: Easy selection of 7 wiring types, including Timer-to-Close.
- Continuous-Duty High-Starting Torque Motor: Performs reliably in demanding applications.
- Motor Removable without Affecting Limit Switch Settings: Simplifies maintenance.
- Adjustable Friction Clutch: Protects door and operator from obstruction damage.
- Mid-Stop: Allows partial opening for energy and time savings.
- Maximum Run Timer: Stops or reverses door if closing exceeds expected time.
- Delay-On-Reverse Circuit: Reduces wear by preventing abrupt reversal.
- 3-Button Control Station with Maintenance Alert System (MAS): Provides open/close/stop functions and maintenance notifications.
- Heavy-Duty Drive System: First-stage 5L V-belt, second-third-fourth stages #48 chain, #50 output sprocket chain, industrial ball bearings, and oil-filled bushings.
- Brake: Standard on 3/4 HP, optional on 1/2 HP.
- Construction: NEMA 1 electrical box, 11-gauge steel frame with durable powder coat finish.
- Factory Settings: Preset to C2 wiring for standard open/stop/close functionality.
- Power Options: Available in 1/2 and 3/4 HP; single- or three-phase; capacitor start on single-phase.
- Warranty: Two-year coverage for materials and workmanship.
Safety & Security
- UL 325 Compliance: Operators must use constant pressure to close or have a primary external monitored entrapment protection device.
- Security+ 2.0™: Every click generates a new code, ensuring the door opens only for authorized users.
- Timer-To-Close: Automatically closes the commercial door after a set time for added security.
- Floor Level Chain Hoist with Electrical Interlock: Allows manual operation and safe disconnect during emergencies.
- Floor Level Disconnect: Enables manual lifting of the door in emergency situations.
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What type of doors is the DHJ operator compatible with?
Ideal for heavier rolling doors and grilles, commonly used in shopping malls and commercial applications.
Can I operate the door manually during a power outage?
Yes, the floor-level chain hoist and floor-level disconnect allow safe manual operation.
Does it include a security feature to prevent unauthorized access?
Yes, Security+ 2.0™ ensures a new code is sent with each click so only authorized users can open the door.
Can I monitor and control the door remotely?
Yes, with MyQ® Technology and the MyQ Mobile App (requires 828LM Internet Gateway).
What safety features are included?
UL 325 compliant with constant pressure to close or external entrapment protection, Timer-to-Close, electrical interlock, and emergency manual operation.
What voltage options are available?
Dual voltage connections: Single-phase (115V, 230V) and Three-phase (208V, 230V, 460V)
What maintenance features are included?
3-button control station with Maintenance Alert System (MAS) notifies when routine maintenance is needed.