1. Identify the required rescue operation
Record whether the elevator is hydraulic or traction and whether the required operation is automatic or manual. LR750 product applications include hydraulic automatic rescue and traction manual rescue. MRL describes a machine-room-less arrangement, not a separate drive type.
Bring the controller manufacturer, model, and relevant electrical drawings to the application review. Do not assume compatibility with every controller of the same voltage.
2. Select the voltage class
The current manual specifies adjustable 200-240 VAC output for LR750-2 and 400-480 VAC output for LR750-4. These are two separate classes. For a 480 V requirement, review the -4 configuration with Dynavect.
Check the required supply connections as well as the output. The manual describes an external 120 VAC charging input at J3; the charger supply is a separate selection consideration.
3. Check the loads and generation time
The manual rates the LR750 at 500 W. Identify all loads supplied during rescue, their operating sequence, and starting or inrush requirements. Confirm the application against actual load requirements rather than the power rating alone.
The documented runtime is nine minutes total at maximum output. Generation stops after three minutes, with Button B restart as described in the manual. A design requiring nine uninterrupted minutes must not be inferred from that total.
4. Choose the enclosure
Standard and MRL configurations accommodate different cabinet arrangements. The manual is authoritative for Standard enclosure dimensions: height 7.3 in, width 6 in, depth 8.5 in. The older Standard drawing has conflicting values; request a corrected drawing before establishing mounting or installation clearances. MRL dimensions must be checked separately.
5. Review the interface and documentation
Check ready and rescue signals, safety input, mainline and output connections, charger supply, and any CAN interface requirements with the controller documentation. Use the terminal reference and wiring diagram as part of the review.
Installation and commissioning belong with qualified elevator personnel following the current documentation. Product selection does not replace that process.
Information to include with your inquiry
- Controller manufacturer and model.
- Hydraulic or traction elevator and intended rescue mode.
- Required voltage and available charger supply.
- Connected loads and any known inrush requirements.
- Preferred enclosure and available mounting space.
- Quantity, project location, and required delivery timing.