Maximum Door Area - Liftmaster H Manuel D'installation

OPERATOR SPECIFICATIONS
MECHANICAL
DRIVE REDUCTION:
Model APT and T . . . . . . . . . . Primary: Heavy duty (5L) V-Belt
Output: #48 chain (1/3 and 1/2 HP Model T and APT)
or #41 chain (3/4 and 1 HP Model T ONLY)
Model GT . . . . . . . . . . . . . . . . . . . . . .Primary: 20:1 Heavy duty
worm gear-in-oil-bath speed reducer
OUTPUT SHAFT SPEED:
Model APT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96 RPM
Model GT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.5 RPM
Model T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140 RPM
MAXIMUM DOOR AREA (SQ. FT.)
MODEL T
24 ga.
---
22 ga.
Steel
Fiberglass
Alum.
Doors Doors
--- ---
310
1/3 HP 285
400 350
1/2 HP
560
3/4 HP 500
640 625
1 HP
MODEL GT
24 ga.
--- 22 ga.
Steel
Fiberglass Alum.
Doors
Doors
---
---
400
1/2 HP 350
560 500
3/4 HP
625
1 HP 575
--- 625
1-1/2 HP
Secondary: #41 chain/sprocket;
Output: #41 chain
20 ga.
16 ga.
Steel
Steel
---
Wood
---
---
Doors
24 ga.
20 ga.
16 ga.
Steel Steel
Steel
Insul.
Insul.
Insul.
260
175
125
320
250
200
450
325
275
560
400
310
20 ga.
16 ga.
Steel
Steel
---
Wood
---
---
Doors
24 ga.
20 ga.
16 ga.
Steel
Steel
Steel
Insul.
Insul.
Insul.
320
250
200
450
325
250
500
400
300
550
475
380
DOOR SPEED (not adjustable):
Model APT . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7" per second
Model GT . . . . . . . . . . . . . . . . . . . . . . . . . . .11-12" per second
Model T . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-12" per second
BRAKE: . . . . . . . . Solenoid actuated disc brake on 3/4 and 1 HP,
standard on Models APT and GT (Available as an option
BEARINGS: . . . . . . . . . . . . . . Output Shaft: Shielded ball bearing
Model APT and T . . . .Clutch Shaft: IronCopper sintered and oil
MODEL APT
24 ga.
22 ga.
Steel
Alum.
Doors
Fiberglass
Doors
1/2 HP 250
5
for 1/3 and 1/2 HP)
impregnated
20 ga. 16 ga.
Steel Steel
---
Wood ---
---
Doors
24 ga. 20 ga.
16 ga.
Steel Steel
Steel
Insul. Insul.
Insul.
225 150
100
Operator Specifi cations - Trolley