HOIST AND JACKSHAFT OPERATORS
CARTON INVENTORY
Before beginning installation confirm all components are enclosed.
DESCRIPTION
Powerhead assembly
Installation manual and caution labels
Hardware box (includes fasteners)
3-Button Control Station with MAS LED
LiftMaster Monitored Entrapment Protection (LMEP)*
Hoist hand chain (Models H, HJ and GH ONLY)
Door sprocket (with setscrew and keyway)
Door/operator drive chain
* Based on customer order.
** Additional accessories may be included.
OPERATOR SPECIFICATIONS
DUAL VOLTAGE CONNECTIONS
Increase flexibility by enabling the installer to select the required
voltage, within phase, to meet job-site requirements.
MODEL
VOLTAGE
HZ
H
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J
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HJ
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GH
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TYPE: Continuous duty
ELECTRICAL
TRANSFORMER:
24Vac Secondary
CONTROL STATION: NEMA 1 General Purpose 3-Button Control
Station Open/Close/Stop w/LED
WIRING TYPE:
C2 (Factory default), B2, T, TS, D1, E2 and
FSTS. See page 29 for more information
regarding wiring types.
BRAKE:
J Standard on 3/4 and 1 HP operators
(optional on 1/2 HP)
H Standard on 3/4 and 1 HP operators.
(optional on 1/2 HP).
Standard on all GH operators.
DISCONNECT:
Model J - Floor level disconnect for
manual door operation.
Models H and GH - Floor level chain hoist
with electrical interlock for manual door
operation.
Model HJ - Includes both floor level
disconnect systems stated above.
HP
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To prevent possible SERIOUS INJURY, DEATH, or uncontrolled
descent of the door:
• When installing a jackshaft-style operator on a sectional door,
additional precautions MUST be taken to assure that proper
door cable tension is present throughout the ENTIRE travel of
the door.
MECHANICAL
DRIVE REDUCTION:
Model J, H, and HJ - Primary: Heavy duty (5L) V-Belt
PHASE
Model GH - Primary: 45:1 for 1/2, 3/4 and 1 HP
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DOOR SPEED:
LIMIT ADJUST:
BEARINGS:
HAND CHAIN WHEEL: H, HJ, and GH only. Ordered Left or Right
14
Carton Inventory/Operator Specifications - Hoist and Jackshaft
Secondary: #48 chain/sprocket;
Output: #50 chain
Worm gear-in-oil bath gear reducer 44:1 for
1-1/2 and 2 HP 42:1 for 3 HP
Output: #50 chain
Model J, H and HJ - 8-9" (20-23 cm) per
second depending on door
Model GH - 8-9" (20-23 cm) per second
depending on door
Linear driven with adjustable limit nuts up to
24 feet (7.3 m).
Models H and HJ - Industrial ball bearings on
output shaft, heavy-duty oil-filled bushing on
reduction shafts.
Model J - Industrial ball bearings on 1"
(2.5 cm) output shaft; heavy-duty oil-filled
bushings on reduction shafts.
Model GH - Sealed roller bearings in gear
reducer.
for H, HJ, and 3 HP GH. Switchable in
field for GH 1/2 through
2 HP.