Bottom Drive Power Units
• The power unit is mounted on the door frame.
• The bottom drive power unit is fully assembled on the door frame at the factory
• The bottom drive requires less installation time - a real time saver
• The bottom drive does not take up any extra room, it's mounted on the door frame.
• The bottom drive is easy to get to for the service end.
• The bottom drive power unit is built heavy with some very nice features.
• 80% of the doors manufactured by Schweiss Customers are demanding the popular "New Lift
Straps"
A. Tube
B. Tube
C. Tube
D. Tube
| 1. | Manual Side Latch | 16 | Kick Outs | |||
| 2. | Bottom Truss | 17. | Kick Out Plates | Upgrade Equipment: | ||
| 3. | Bearing Plates | 18. | Insulation (Blanket Type) | Yes | No | |
| 4. | Strap Drums | 19. | Exterior Sheeting | 1 - Top Override Jiggle Switches | ||
| 5. | Drive Shaft | 20. | Single Hinge | 2 - Side Latch Jiggle Switches | ||
| 6. | Center Wind Pin | 21. | Top Hinges | 3 - Electric Photo Eye Sensor | ||
| 7. | Bottom Drive Electric Power Unit | 22. | Top Height Half | 4 - 2 Button Constant Hold Control 4 - Station |
||
| 8. | Safety Limit Switch | 23. | Bottom Height Half | 5 -Door Base Safety Edge | ||
| 9. | Walk Door | 24. | Top Center Cross Tube | 6 - Warning Lights and Horn | ||
| 10. | Building Side Columns | 25. | Bottom Center Cross Tube | 7 - Emergency Back-Up | ||
| 11. | 3" Bottom Door Roller | 26.. | Bottom Rubber | |||
| 12. | Up/Down/Stop Switch | 26a. | Motor Shield | |||
| 13. | Lift Straps | 27. | Top Rubber (Optional) | |||
| 14. | Strap Tightener | 28. | Safety Shields Included | |||
| 15. | Center Hinges | |||||
The gear motor is equipped with an electric brake to stop and hold door in any position of door travel.
Electric operator is pre-wired and fully assembled. The motor and gear box and all
necessary hardware are included. All drive bearings come standard with grease fittings. Our
heavy duty components ensure you many years of use. Standard Bottom drive assembly can
be easily inspected and maintained.

Top Drive Power Units
• The power unit is mounted stationary, up and above your clear opening.
• The power unit is located in the center of your clear opening.
• The location of the top power unit will not affect your clear opening.
• The nice part about a top drive unit - it's up and out of the way.
• The top drive power unit must be installed on the job (good instructions).
• The top drive power unit is built heavy duty with some very nice features.
A. Tube
B. Tube
C. Tube
D. Tube
| 1. | Manual Side Latch | 14. | Center WInd Pins | |||
| 1a. | Safety Latch | 15. | Bottom Truss | Upgrade Equipment: | ||
| 1b. | Top Override Switch | 16. | Gussets | Yes | No | |
| 2. | Safety Limit Switch | 17 | Cable Clamps & Slides | 1 - Top Override Jiggle Switches | ||
| 3. | Schweiss Electric Power Unit | 18. | Walk Door | 2 - Side Latch Jiggle Switches | ||
| 4. | Top Hinges | 19. | Building Side Columns | 3 - Electric Photo Eye Sensor | ||
| 5. | SIngle Hinge | 20. | 3" Bottom Door Roller | 4 - 2 Button Constant Hold Control 4 - Station |
||
| 6. | Cable Pulley Angles | 21. | Top Height Half | 5 -Door Base Safety Edge | ||
| 7. | Aircraft Cables | 22. | Bottom Height Half | 6 - Warning Lights and Horn | ||
| 8. | Center Hinges | 23. | Top Center Cross Tube | 7 - Emergency Back-Up | ||
| 9. | Exterior Sheeting | 24. | Bottom Center Cross Tube | |||
| 10. | Insulation | 25. | Bottom Rubber | |||
| 11. | Kick Outs | 25a. | Bottom Safety Edge | |||
| 12. | Kick Out Plates | 26.. | Top Rubber (Optional) | |||
| 13. | Up/Down/Stop Switch | |||||
Power Unit
Cable Drum
Electric
Limit Switch
Top Drive
Power Unit
Side View
Floor Level
Building Header
Header Bolt
Single Hinge
Bi-Fold Door
Building
Side Column
Cable B
Cable D
Bi-Fold Door Header
Pulley Angle ( F )
Brackets
Left Side
Inside of Bldg.
( H ) Distance Of 7"-8" From Center
Of Header To Center Of Cable
Drum
Pulley Angle Brackets
Cable A
Cable C
( E ) Extra
Bracing
Top Drive
Power Unit
Right Side
Inside of Bldg.
Top drives are up and out of the way -
This is very important for certain applications.
Your Choice!! Bottom drive or Top drive, No extra cost!
