Models and Variants
| Series | Door Type | Motor | Key Features |
|---|---|---|---|
| DT-Series | Counterbalanced sectional | 1 HP 3-phase inverter-duty, TENV, IP-55 | Optional 24 VDC disc brake (DTB/DTBC); hand crank, floor disconnect or chain hoist with electrical interlock |
| DH-Series | Non-counterbalanced sectional or rolling | 1 to 7.5 HP 3-phase inverter-duty brake motor, totally enclosed, IP-55 | Same manual options; high-end worm gear reducer; single-turn mechanical limits |
| DS-Series | Non-counterbalanced sectional or rolling | Inverter-duty rated, totally enclosed, IP-55 | Direct drive worm reducer; limits stay synchronized during motor removal or manual operation |
Typical Applications
The IP-55 sealed, inverter-duty construction makes these units a fit for wash-down environments, food processing plants and dusty industrial sites where an open motor would not survive. DT models handle counterbalanced sectional doors; DH and DS models cover non-counterbalanced sectional and rolling doors where performance, speed and long service life are specified.
What Fails and How We Repair It
Removing the chain drive shifts the failure profile to the motor, VFD, gear reducer and limit system. Because the motors are inverter-duty rated, a fault often originates in the drive parameters rather than the motor itself , symptoms like hunting, stopping short or running slow usually mean the VFD needs recalibration before any motor replacement. The single-turn mechanical limit system holds its settings through manual operation and motor removal, so limit drift is uncommon. When the worm gear reducer shows wear or the optional disc brake needs attention, we replace the affected components with factory parts and re-commission the drive on site.
Choosing Between Models
If your door is counterbalanced sectional, the DT-Series is the direct drive match. For non-counterbalanced sectional or rolling doors, DH and DS models scale from 1 to 7.5 HP. The data plate on the operator housing lists the exact model code, voltage and phase , note those plus the approximate daily cycle count and we can confirm the right unit or repair kit for your application.
Parts and Accessories
Manaras supplies a full accessory range for these operators, including monitored and non-monitored photo-eyes, edge sensors, push-button stations and loop detectors. We source genuine replacement motors, VFDs, brake assemblies, worm reducers and limit components so repairs restore original specifications.
Service in Metro Vancouver
We diagnose VFD parameter issues, replace gear reducers, rebuild brake assemblies and re-commission limits from our Richmond shop. Whether the unit needs a drive recalibration or a complete operator swap, our trucks carry the common parts for the DT, DH and DS series.
Call 778-873-7282 or tap to dial for a service visit or a quote on a new direct drive installation.
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