Sliding doors are a different mechanical problem from overhead doors, and Manaras builds two operators for them. The OSL is the heavy-duty commercial unit; the MGSL is the very heavy-duty worm gear version for the largest openings. Both handle single and bi-parting doors.
What This Operator Suits
Industrial single and bi-parting sliding doors.
OSL runs a 120 rpm output shaft through #41 full roller chain, with an electrically activated drum-band solenoid brake. Dual 12-gauge pre-drilled galvanized tracks are provided for doors up to 12 ft wide standard, with additional track lengths available.
MGSL is the worm gear unit, very heavy-duty, for large single and bi-parting sliding doors, also with a drum-band solenoid brake. Where the OSL runs out of capacity, this is the step up.
The brake is standard rather than optional on both, and that is deliberate: a sliding door carries its weight horizontally, so without a brake it keeps travelling when the motor stops. Positional control is not a luxury on a slider.
Specification
| Item | Detail |
|---|---|
| Motor (OSL) | 60Hz high starting torque, continuous-duty, single-phase capacitor start or 3-phase, open drip proof. 50Hz 220V 1-phase and 380V 3-phase available |
| Output shaft speed (OSL) | 120 rpm |
| Reduction (OSL) | 5L/B V-belt first step, additional step by #41 chain and sprockets. 5/8″ input, 1″ output, ball bearings |
| Drive (OSL) | #41 full roller chain. Dual 12-gauge galvanized tracks for doors up to 12 ft wide standard |
| Motor (MGSL) | Very heavy-duty worm gear industrial |
| Brake | Both: electrically activated drum-band type solenoid brake |
| Manual operation | Quick release disconnect arm for manual sliding operation |
Duty rating in plain terms. OSL heavy-duty commercial; MGSL very heavy-duty industrial.
What Fails on This Unit
Sliding door faults are usually track and roller before they are operator. Debris in a floor track, a bent guide, or a roller that has flat-spotted will bind the door and load the motor until something gives. On any slider call we check the track first.
On the operator itself, brake wear and chain wear. The 120 rpm output on the OSL is considerably faster than the overhead units, which means chain and sprocket wear accumulates more quickly than people expect.
Manufacturer Documents
Originals from Manaras-Opera, useful if the paperwork for a unit already in your building has gone missing:
- Specification sheet (OSL)
- Specification sheet (MGSL)
- Sell sheet (OSL)
- Sell sheet (MGSL)
- Dimension drawing (OTH/OTBH/OSL)
- Dimension drawing (MGT/MGSL)
- Slider order form
Choosing Between Models
For overhead doors see the OTH/OTBH trolleys and the jackshaft range. If you are unsure which unit you have, the model code is on the data plate on the operator housing. Note the voltage and phase while you are there, and roughly how many cycles a day the door runs, those three facts decide most of what we would bring to a call.
See the full Manaras model reference for the whole range, or Manaras operator repair for service.
Parts and Accessories
Manaras publish a full accessory range that pairs with this operator: monitored and non-monitored photoelectric cells, light curtains, electric and pneumatic sensing edges, interface modules, push-button and key switch control stations, pull switches, keypads and card readers, radio receivers and transmitters, and traffic light kits.
One point that causes repeated confusion: on a UL 325 monitored circuit, a failed safety device makes the operator refuse to close. That is correct behaviour, not a malfunction. A door that suddenly will not close, with no other symptom, is very often a photo eye or sensing edge that has failed or drifted out of alignment.
- Accessory catalogue (PDF)
- Accessories and replacement components list (PDF)
- Radio Series 900 dip-switch compatibility chart (PDF)
- Radio Series 100 rolling code compatibility chart (PDF)
- Operator codes explained (PDF)
We stock the common wear items for the Opera and MEGA series, control boards, clutches, solenoid coils, limit switch assemblies and safety edges. Anything we do not carry we source through our distributor, and you will hear about a lead time before we attend rather than after.
Frequently Asked Questions
How do I confirm I have a OSL?
The model code is on the data plate on the operator housing. If the plate is unreadable, which happens on older units in damp parkades, send us a photo of the operator and we can usually identify it from the frame and drive layout.
Do you stock parts for it?
We carry the common wear parts across the Opera and MEGA series. Model-specific components come through our distributor, typically within two business days.
Is it worth repairing or should we replace it?
Clutches, brakes, boards, limits, safety devices and wiring are repairs. A seized gear reducer or a burnt-out motor on a very old unit is usually a replacement. We tell you which one you are looking at and why, rather than leading with a new-operator quote.
Can you service a unit we did not buy from you?
Yes. Most Manaras units we attend were installed by someone else, often years ago.
The door will not close but opens fine. Is the operator dead?
Almost certainly not. That is the classic monitored safety circuit symptom, a photo eye, light curtain or sensing edge that has failed or moved. Check the lenses are clean, the alignment is good, and nothing is parked in the beam before assuming the worst.