Manaras Model Classes & Variants
Manaras organizes its lineup by duty rating and drive type. The table below lists every current model code and its classification , use it to match the code stamped on your data plate.
| Category | Model Code | Class / Description |
|---|---|---|
| Jackshaft Operators | Opera-MJ / OMJ | Medium-duty jackshaft |
| Opera-MH / OMH | Medium-duty jackshaft with hoist | |
| Opera-J / OPJ | Heavy-duty jackshaft | |
| Opera-H / Opera-HJ / OPH / OHJ | Heavy-duty jackshaft with hoist | |
| Opera-SH / OSH | Heavy-duty industrial jackshaft | |
| Opera-BH / OBH | Heavy-duty jackshaft, Hoist-a-matic self-engaging hoist | |
| MSJ | Ultra heavy-duty industrial hoist | |
| Opera-GH / OGH | Gearhead worm gear jackshaft | |
| MGH | Heavy-duty gearhead | |
| MRGH | Very heavy-duty 3-phase gearhead , largest worm gear unit | |
| Trolley Operators | MLT | Medium-duty trolley for smaller, low-cycling doors |
| OMT / OMBT | Medium-duty trolley (OMBT includes brake) | |
| OTH / OTBH | Heavy-duty trolley (OTBH includes brake) | |
| MGT | Heavy-duty worm gear industrial trolley | |
| Apartment, Parkade & Quiet Operators | OTH-A.00 | Apartment/parkade trolley |
| OTBH-A.00 | Apartment trolley with brake | |
| OTBH-A.05 | Premium apartment trolley | |
| OTH-A.06 | Silencio quiet-operation trolley | |
| OTBH-A.06 | Silencio quiet trolley with brake | |
| RTBH-A.06 | Silencio quiet high-speed trolley | |
| High-Speed (Rapido & Allegro) | Rapido RGH | High-speed gearhead jackshaft |
| Rapido RSH | High-speed V-belt jackshaft | |
| Rapido RMSJ | High-speed ultra heavy-duty hoist (VFD) | |
| Rapido RTBH-1.19 / RTBH-1.23 | High-speed trolley, 19″/sec or 23″/sec opening | |
| Rapido RVH | High-speed operator for vinyl rolling doors | |
| Allegro ALLE | High-speed operator | |
| Sliding Door & Direct Drive | OSL / MGSL | Sliding door operators |
| DT / DH / DS Series | Direct drive operators | |
| Sealed & Special Environment | GHW / GHC | Worm gear jackshaft, NEMA 4/12 washdown (W) or 4X corrosive (C) |
| OPH-W / OPH-C | V-belt jackshaft, washdown/corrosive trim | |
| OSH-W / OSH-C | Heavy-duty jackshaft, washdown/corrosive trim | |
| GHX | CSA-certified hazardous location (Class I Div D, Class II Div F & G) |
Decoding the Manaras Product Code
Every operator ships with a seven-position code on the data plate. Reading it tells you the exact model, voltage, horsepower, mechanical configuration and control board installed. Here is the structure:
| Position | Meaning | Values |
|---|---|---|
| 1. Model | Base operator model | Any code from the tables above (e.g., OTBH) |
| 2. Environment | Special environment trim | No letter = standard · W = damp/washdown · C = corrosive · X = hazardous location |
| 3. Power | Frequency, voltage & phase | 611 = 120V 1-ph · 681 = 208V 1-ph · 621 = 240V 1-ph · 623 = 208V 3-ph · 673 = 240V 3-ph · 643 = 480V 3-ph · 653 = 600V 3-ph · 521 = 220V 1-ph 50Hz · 533 = 380V 3-ph 50Hz |
| 4. Horsepower | Motor size | 2 = 1/2 HP · 3 = 3/4 HP · 4 = 1 HP · 5 = 1-1/2 HP · 6 = 2 HP · 7 = 3 HP · 8 = 5 HP |
| 5. Mechanical | Hoist mount or chain | Jackshaft hoist: 0 = right, 1 = left · Trolley chain: 0 = #48/#410, 1 = #41 · Sliding door: 1 = #41 · Apartment: A |
| 6. Control Board | ECB configuration | M = monitored with photoelectric cells · N = monitored without photoelectric cells · P = external control panel |
| 7. Other | Additional modifications | Application-specific, if any |
Worked example: OTBH W 611 3 1 M 00 decodes as a heavy-duty trolley with brake (OTBH), washdown trim (W), 120V single-phase (611), 3/4 HP motor (3), #41 chain (1), monitored board with photo eyes (M), no extra modifications (00).
Typical Applications by Model Class
- Medium-duty jackshaft & trolley (OMJ, OMH, MLT, OMT): Light commercial sectional doors, low-cycle loading docks, storage facilities.
- Heavy-duty jackshaft & trolley (OPJ, OPH, OHJ, OTH, OTBH): Standard commercial/industrial sectional doors, higher cycle counts, doors requiring brake for safety.
- Industrial gearhead & ultra heavy-duty (OGH, MGH, MRGH, MSJ, MGT): Large, heavy doors, very high cycle rates, mining, manufacturing, distribution centres.
- Apartment / parkade / Silencio (OTH-A.00, OTBH-A.00/.05/.06, RTBH-A.06): Residential parkades, multi-family buildings where quiet operation matters.
- High-speed Rapido & Allegro (RGH, RSH, RMSJ, RTBH, RVH, ALLE): High-traffic openings, cold storage, clean rooms, vinyl rolling doors , any application demanding fast cycle times.
- Sliding & direct drive (OSL, MGSL, DT/DH/DS): Horizontal sliding doors, specialized direct-drive installations.
- Washdown, corrosive & hazardous (GHW/C, OPH-W/C, OSH-W/C, GHX): Food processing, chemical plants, vehicle wash bays, classified hazardous locations.
Common Failure Modes & How We Repair Them
Because we service what we sell, we see the same wear patterns across the Manaras line. The most frequent issues we handle in our Richmond shop:
- Limit switch drift or failure , causes over-travel or door not opening fully. We replace the limit assembly and recalibrate.
- Brake solenoid or lining wear on OTBH, OMBT, OTBH-A models , door drifts down or won't hold. We install factory brake kits and adjust air gap.
- ECB control board faults , monitored boards (M/N config) can lose photo-eye inputs or relay outputs. We diagnose with Manaras test equipment and swap boards.
- Hoist mechanism binding on Opera-MH, Opera-H, Opera-HJ, Opera-BH , manual chain hoist seizes from lack of lubrication or corrosion. We disassemble, clean, grease and replace worn sprockets.
- Worm gear wear on OGH, MGH, MRGH, MGT , high-cycle industrial units develop backlash. We inspect gear sets and replace worm/wheel pairs as needed.
- VFD parameter errors on Rapido RMSJ and other VFD-driven high-speed units , incorrect acceleration/deceleration ramps cause door slam or faults. We reprogram drives to Manaras specs.
- Environmental seal degradation on W/C/X trim units , water or chemical ingress corrodes limit switches, brakes and motor windings. We reseal enclosures and replace corroded components.
- Chain stretch or sprocket wear on trolley and sliding door operators , causes jerking, noise, missed limits. We tension or replace chain and sprockets per position 5 specs.
All repairs use genuine Manaras parts. We carry common limit switches, brake kits, ECB boards, hoist components, chain and sprockets in our Richmond warehouse; specialty gear sets and VFD modules are ordered direct from the factory with typical 2 to 3 business day lead time.
Choosing Between Models
Selection depends on door weight, cycle count, environment and required speed:
- Cycle rating: Medium-duty (OMJ, OMT, MLT) suits under 25 cycles/day. Heavy-duty (OPJ, OPH, OTH, OTBH) handles 25 to 75 cycles/day. Industrial gearhead (MGH, MRGH, MSJ, MGT) and Rapido high-speed units are built for 75+ cycles/day.
- Hoist requirement: If manual operation during power loss is required, choose a hoist model (OMH, OPH, OHJ, OBH, MSJ). Hoist-a-matic (OBH) self-engages automatically.
- Brake: Required on doors over 14 ft high or where uncontrolled descent is a hazard , specify OTBH, OMBT or OTBH-A variants.
- Environment: Washdown (W)