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Essential safety precautions to follow during installation, operation, and maintenance.
Guidelines for locating the dryer based on ambient air temperature.
Requirements for dryer mounting location and necessary clearances.
Recommendations for dryer placement within the compressed air system.
Guidelines for installing piping and making connections to the dryer.
Explanation of how the automatic no-loss drain valve functions.
Details on EOCR status indicators and fault conditions for specific models.
Explains the PCM-based cooling mechanism of the FLEX dryer.
Describes how compressed air is processed through the dryer's cooling system.
Outlines the basic and advanced functions of the OPTI-Eco Controller.
Instructions on operating the OPTI-Eco Controller and interpreting its displays.
Details on alarm indicators and error codes displayed by the controller.
Pre-operation checks and preparations required before starting the dryer.
Step-by-step procedure for starting the FLEX dryer.
Procedure for safely shutting down the dryer for maintenance or other reasons.
Overview of routine maintenance for good dryer performance.
Daily checks required for the no-loss drain valve.
Recommended monthly inspection of condenser coils.
Annual replacement recommendations for drain service and filter elements.
Technical specifications including dimensions and weight for all models.
Electrical power supply requirements and consumption for each model.
Defines the minimum and maximum operating limits for pressure and temperature.
Details cut-out and cut-in pressure settings for refrigerant control.
Multipliers for adjusting performance based on air and ambient temperatures.
Displays dew point levels and corresponding color indicators.
The SPXFLOW FLEX Series is a line of refrigerated type compressed air dryers designed to remove moisture from compressed air systems, preventing issues like rust and sludge in pipelines. These dryers utilize a Phase Change Material (PCM) to achieve energy-efficient operation, reportedly saving up to 99% of energy at no-load conditions.
The dryers operate by cooling warm, saturated compressed air to condense entrained moisture. Air first enters an air-to-air heat exchanger where it is pre-cooled by outgoing cold, dry air. This pre-cooling step condenses up to 65% of the moisture before the air reaches the refrigeration chiller, reducing the heat load on the refrigerant compressor. In the chiller (evaporator), the air is further cooled by cold refrigerant, which also cools and solidifies the PCM. Once the PCM is sufficiently cooled and solidified, the refrigeration compressor and condenser fan can stop, allowing the PCM to continue cooling the compressed air without consuming power. As the PCM gradually liquefies by absorbing heat from the compressed air, and when it's fully melted, the compressor and fan resume operation to re-cool the PCM. An electronic drain valve then removes the condensate from the air stream. The cold, dry air is reheated by incoming warm air as it passes back through the air-to-air heat exchanger before exiting the dryer.
The FLEX Series includes models DFX 1.1, DFX 1.2, DFX 1.5, DFX 2.1, DFX 3.1, DFX 4.1, DFX 4.5, and DFX 5.5. Rated Flow Capacity (according to ISO 7183, Option A2) ranges from 75 scfm (DFX 1.1) to 550 scfm (DFX 5.5). Inlet/Outlet Connections are NPT 1" for DFX 1.1 and DFX 1.2, and NPT 2" for DFX 1.5 through DFX 5.5. Net Weight ranges from 120 lbs (54.5 kg) for DFX 1.1 to 396 lbs (180 kg) for DFX 5.5. Electrical Data:
The dryers are designed for indoor installation in a clean, well-ventilated area with ambient air temperatures between 39°F (4°C) and 122°F (50°C). A minimum clearance of 39 inches (1000 mm) on the sides and front is required for cooling airflow and service access. The OPTI-Eco Controller, available in Level 1 (basic functions for DFX 1.1, DFX 1.2) and Level 2 (advanced functions for DFX 1.5 through DFX 5.5), provides operational status. It displays energy saving percentage, dryer operating time, refrigerant compressor operating time, and dew point level. Level 2 controllers also feature data storage for up to 30 days of operating data, a MICRO-USB connection port for data download and firmware upgrades, and a communication port for Bluetooth or RS485 Modbus monitoring (optional). The automatic no-loss drain valve uses two electrostatic capacity sensors to detect and discharge condensate selectively, preventing energy loss. The drain valve can be manually tested using a "push-to-test" button. Safety features include warnings against operating with improper line voltage, exceeding maximum pressures or temperatures, and removing cabinet panels during operation. An Electronic Over Current Relay (EOCR) on DFX 3.1, DFX 4.5, and DFX 5.5 models monitors compressor motor circuits for overcurrent, phase unbalance, phase failure, and reverse phase, indicated by fault LEDs and error codes on the LCD. Start-up procedure requires energizing the dryer for 24 hours prior to starting the refrigeration compressor for models DFX 1.5 through DFX 5.5 to prevent non-warrantable compressor failure. The dryer is designed for repeated start/stop cycles and will not freeze up if compressed air demand is interrupted.
The FLEX Dryer requires minimal routine maintenance for satisfactory operation.
General| Brand | SPX FLOW |
|---|---|
| Model | Deltech FLEX Series |
| Category | Dehumidifier |
| Language | English |
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