Medical Air Oil-Less Scroll System

Ohio Medical Oil-Less Rotary Scroll Compressed Air System is fully NFPA 99 compliant. The unit consists of electric motor driven single stage Oil-Less rotary scroll air compressor module(s), electrical control system, ASME air receiver, air cooled aftercooler(s) with individual drains, inline intake air filters, air treatment module, interconnection copper/brass piping, and wiring. The components are modularly assembled to accommodate most existing doorways and designed for serviceability. The packaged unit is factory tested prior to shipment and warranted for a period of 30 months from date of shipment or 24 months from date of start-up.

The compressor(s) have PTFE composite tip seals and be rated for 10,000 hours of operation. Compressor’s bearings are external to the compression chamber and serviceable. Compressors with bearings that are not accessible for service and have limited life span are not accepted. Each belt driven compressor module inlet includes an inline filter with particle retention of 5 microns, inlet isolation valve and flex connector. The compressor discharge piping includes air cooled after cooler with moisture separator and automatic drain, isolation valves, ASME safety pressure relief valve, thermal malfunction shutdown device. Recirculation liquid control is interactive through a temperature sensor, with a range of 75°F to 90°F. Each recirculation liquid line will include a strainer and isolation/flow regulation valve. The make-up water lines include a strainer, regulating valve, solenoid valve with manual priming valve and flexible connector.

The corrosion resistant coated receiver is equipped with an ASME safety pressure relief valve, sight glass pressure gauge, automatic drain, three-valve by-pass and source isolation valve.

The Air Treatment Module includes dual dryers, dual filtration system, and a CO and Dew Point monitoring device with local audible and visual signals and dry contacts for remote monitoring. The components are mounted on a common base with interconnecting copper/brass piping and upstream and downstream isolation valves. The isolation valves allow either set of components to be serviced without shutting down the system.
The dryer system is duplexed and provide a pressure dew point of 10°F. Dryers are heatless desiccant design, selected and sized to provide for the peak-calculated demand. The desiccant dryer is equipped with a Dewpoint Dependent Switching feature to minimize the need for purge air.
The dual filtration system is designed to remove liquids and particulate matter and consists of one micron coalescing filter with differential pressure indicators, automatic drain, air line pressure regulators with gauges, final pressure relief valve and sampling valve.

The UL listed electrical motor control system contains a fuse less design in a NEMA 12 enclosure. The “Continuous On Demand” feature stops the operation of the motors during periods of low or no demand. The controls include individual self-protected combination motor controls with short circuit, single phase and thermal overload protection, individual 120 volt control circuit transformers with fuse less primary and secondary protection, pressure sensors, temperature switches with reset button, and an electronic controller to automatically change the operating sequence of the compressors. The cabinet door has an HMI (Human Machine Interface) Color Touch Screen system status display to include system pressure, dewpoint, pump operation, accumulated time, maintenance interval, fault conditions, and silence button; lighted Hand-Off-Automatic selector switches and safety disconnect operating handles. All required local alarm functions are integrated into the packaged system.
All required local alarm functions are integrated into the packaged system. The circuitry is designed so the audible signal can be silenced, and the visual indicator will remain until the fault has been cleared and the reset button actuated. Local alarm functions are provided for reserve pump in use (lag alarm). Dry contacts and/or remote communication protocols provided for remote alarm signals or BMS.

Accessories included for job site installation are inlet and discharge flexible connectors, vibration mounting pads, and source isolation valve.

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