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Details the procedure for inspecting the dryer upon delivery for any damage.
Provides instructions on safely unpacking and handling the dryer using appropriate equipment.
Lists essential safety rules for operating and maintaining the dryer, including personnel qualifications.
Explains the meaning of Warning, Caution, and Notice symbols used throughout the manual.
Provides a general overview of how Nirvana Cycling dryers remove moisture by cooling compressed air.
Describes the components that interact with compressed air and the airflow path within the dryer.
Explains the process of separating and removing liquid condensate from the compressed air stream.
Details the components and operation of the R-404A refrigerant circuit for cooling.
Describes the closed-loop system that circulates thermal mass fluid for efficient cooling.
Explains the automatic control functions, thermostat, and gauges that manage dryer operation.
Guidelines for selecting a suitable location and properly mounting the dryer for optimal performance and access.
Instructions for installing piping, fittings, and valves for proper dryer connection and maintenance.
Recommends using prefilters and afterfilters to protect the dryer from contaminants and ensure performance.
Details the procedure for connecting the dryer to the power supply, including wiring and safety.
Step-by-step guide for safely starting the dryer for the first time after installation.
States that the dryers require minimal maintenance, with recommended periodic inspections.
Emphasizes the importance of cleaning condenser fins regularly for efficient operation.
Provides instructions for checking and cleaning the drain system to prevent blockages and ensure proper operation.
Introduces the troubleshooting guide designed to help identify and correct dryer malfunctions.
A comprehensive guide listing common problems, their symptoms, possible causes, and corrective actions.
Details the procedure for inspecting the dryer upon delivery for any damage.
Provides instructions on safely unpacking and handling the dryer using appropriate equipment.
Lists essential safety rules for operating and maintaining the dryer, including personnel qualifications.
Explains the meaning of Warning, Caution, and Notice symbols used throughout the manual.
Provides a general overview of how Nirvana Cycling dryers remove moisture by cooling compressed air.
Describes the components that interact with compressed air and the airflow path within the dryer.
Explains the process of separating and removing liquid condensate from the compressed air stream.
Details the components and operation of the R-404A refrigerant circuit for cooling.
Describes the closed-loop system that circulates thermal mass fluid for efficient cooling.
Explains the automatic control functions, thermostat, and gauges that manage dryer operation.
Guidelines for selecting a suitable location and properly mounting the dryer for optimal performance and access.
Instructions for installing piping, fittings, and valves for proper dryer connection and maintenance.
Recommends using prefilters and afterfilters to protect the dryer from contaminants and ensure performance.
Details the procedure for connecting the dryer to the power supply, including wiring and safety.
Step-by-step guide for safely starting the dryer for the first time after installation.
States that the dryers require minimal maintenance, with recommended periodic inspections.
Emphasizes the importance of cleaning condenser fins regularly for efficient operation.
Provides instructions for checking and cleaning the drain system to prevent blockages and ensure proper operation.
Introduces the troubleshooting guide designed to help identify and correct dryer malfunctions.
A comprehensive guide listing common problems, their symptoms, possible causes, and corrective actions.
The Ingersoll Rand Nirvana Cycling refrigerated air dryer is designed to remove moisture, oil vapor, and other contaminants from compressed air, which are detrimental to pneumatically operated appliances, controls, instruments, machinery, and tools. This removal is achieved by cooling the air with a refrigeration unit to a temperature at which moisture in the air condenses and separates from the air stream. The air is typically cooled to a dew point between 34°F (1°C) and 38°F (3°C). This dryer can be easily integrated into various pneumatic systems requiring or desiring dry air.
The dryer operates through several major systems: the Air System, Moisture Removal System, Refrigeration System, Thermal Mass Circulating System, and Controls. In the Air System, hot saturated air from the compressor enters a precooler/reheater, where its temperature is reduced by the cool air exiting the air/moisture separator. This precooling allows for a smaller refrigeration system. The air then moves into the chiller section, where it is further cooled to the desired dew point by a thermal mass fluid. The temperature of this fluid is maintained by the refrigeration circuit and controls. The air then proceeds to the separator, where moisture is removed. The cool, dry air returns to the precooler/reheater to be heated by the incoming moist hot air. The air exiting the reheater portion of the dryer should be approximately 15°F to 20°F lower than the inlet air temperature under standard conditions at full rated flow.
The Moisture Removal System removes liquid droplets from the air stream in the separator. As the air and liquid mixture passes through the separator, it spins, slows down, and changes direction, causing condensate to fall out of the air stream and collect at the bottom of the separator. The collected liquid is then removed by a drain.
The Refrigeration System handles R-404A within a hermetically sealed closed-loop system. Refrigerant leaves the evaporator section, where it removes heat and changes from a low-pressure liquid to a low-pressure gas. This gas enters the suction side of the compressor, where it is compressed into a high-pressure gas. The high-pressure gas is then cooled in the air-cooled condenser section, becoming a high-pressure liquid. It passes through a permanent filter dryer, ensuring the refrigeration system is free of contaminants. A small diameter capillary tube meters the refrigerant for introduction into the evaporator, reducing its pressure as it enters and evaporates, removing heat from the thermal mass fluid.
The Thermal Mass Circulating System continuously circulates thermal mass fluid in a closed pump loop. Heat is removed from the fluid in the evaporator by the refrigeration system. The thermal mass reservoir is sized to minimize refrigeration cycles during reduced air load periods. The fluid is pulled from the bottom of the reservoir and pumped through the chiller, removing heat from the air, and then returned to the evaporator. The maintenance-free, quiet cartridge circulator pump, similar to those used in residential water systems, runs continuously to maintain flow through the chiller, even when the refrigeration system cycles on and off based on loading conditions. However, the circulating pump will not operate if the power switch is off.
The dryer incorporates automatic controls for proper operation. A thermostat monitors the thermal mass fluid temperature and cycles the refrigeration system in response to varying air flow and temperature. When the thermal mass fluid temperature increases, the compressor cycles on. Once the fluid cools to its control set point, the compressor cycles off. The thermal mass fluid acts as a thermal storage mass. A suction pressure gauge monitors the refrigerant gas pressure before it enters the compressor. When the refrigeration system is running, the suction pressure typically drops to between 55 to 65 psig, depending on load and ambient conditions. After the thermal mass fluid cools and the refrigeration system shuts off, the system pressure equalizes to between 80 and 150 psig, depending on ambient temperature. A "High Temp" alarm light indicates an elevated thermal mass temperature, controlled by a thermostat that energizes the light at approximately 50°F.
For installation, the dryer should be placed in an area where ambient temperature remains between 45°F (7°C) and 113°F (45°C), with at least 18 inches of clearance for free air flow to the condenser inlet and easy access for servicing. It must be installed on a level surface (less than 5° slope). For steady flow rates, the dryer is typically connected after the air receiver. For fluctuating loads, it should be positioned ahead of the receiver with sufficient downstream storage capacity to prevent excessive air flow. If installed after compressors causing significant vibration or air pulsation, proper vibration isolation and pulsation dampening devices should be added. Failure to follow these instructions may result in equipment malfunction and void the warranty.
Piping, fittings, and accessory items should be installed as indicated in the manual. Bypass and isolating valves may be field installed. An isolation valve allows maintenance of the drain valve without isolating air flow to the dryer. To operate the dryer, all valves labeled in the diagram should be closed except for specific operational valves. A bypass valve is used for bypass purposes, and a test and manual drain valve is also provided. Always use a backup wrench when making threaded connections to prevent damage to tubing and internal components.
A prefilter is recommended to protect the air dryer from residual compressor oil and ensure maximum performance. Highly efficient prefilters and afterfilters, sized for the drying application, can be provided by Ingersoll Rand. Condensate discharge oil/water separators are also available to meet EPA regulations.
Electrical connections vary by model. 115V/1/60 units come with a three-wire cord assembly and plug into a suitable 115V/1/60Hz outlet. 230V/1/60 and 220V/1/50 units are furnished with a power cord with leads for a field-installed plug, which must be wired according to the appropriate wiring diagram in the manual. A suitable fused disconnect switch or circuit breaker is recommended. Never wire directly or connect additional wires to the compressor junction box, as this may cause severe system malfunction. Care must be taken to ensure no excessive voltage variations, which can affect compressor starting and potentially cause burnout. Maximum allowable voltage variation is +15% and -10% from rated voltage; exceeding these tolerances will void the warranty.
For initial start-up, depress the ON/OFF switch, and the "Power On" light will illuminate. The "High Temp" light will illuminate until the thermal mass fluid reaches 50°F, then it will go out. The suction pressure gauge will typically pull down to between 60 and 80 PSIG upon initial start-up, and then to between 55 and 65 PSIG as the system operates and cools. After the refrigeration system shuts off, air flow can be introduced to the dryer. Slowly pressurize the dryer after start-up. After installation or a prolonged shutdown, start the dryer with no air load to allow it to reach its proper operating temperature within approximately 30 minutes.
Maintenance is minimal, as the dryers use hermetically sealed compressors that do not require lubrication. Regular component inspection and service are recommended for maximum performance. Condenser fins should be inspected and cleaned regularly, more frequently in dusty environments. An optional ambient air filter kit can be installed. The condensate discharge system drain should be checked monthly and periodically removed and cleaned to prevent debris accumulation. The dryers are equipped with a drain isolation valve, allowing the drain to be cleaned during dryer operation after the valve is manually closed. The isolation valve requires a quarter turn to isolate the drain from system pressure. If the dryer is installed without drain isolation valves, failure to depressurize the dryer before removing the drain valve may result in serious injury.
Troubleshooting guidance is provided for common issues. If moisture is downstream, check for drain failure or adjustment, excessive flow, or an open bypass valve. If inlet and outlet temperatures are the same, check for no power to the dryer, high suction pressure, or a refrigerant leak. If the compressor is not running but the fan is, check the condenser/ambient air filter and ambient temperature. If neither the compressor nor the fan is running, the compressor relay may be faulty, or there may be loose wire connections or loss of power at the control board. If there is high pressure drop across the dryer, check for fluid circulating system malfunction, incompletely open inlet/outlet valves, blocked filters, or a clogged heat exchanger. If the system operating temperature is below 32°F, turn off the dryer and consult your local distributor. Always ensure the dryer is isolated from the compressed air stream and fully depressurized before any maintenance involving disassembly of pipe fittings, valves, or other components. All circuit breakers, disconnect switches, and compressed air valves should be tagged "OUT OF SERVICE" before working on the unit.
General| Phase | 3 |
|---|---|
| Weight | 220 lbs |
| Airflow Capacity | 50 scfm |
| Maximum Pressure | 150 PSIG |
| Inlet Size | 1 in |
| Outlet Size | 1 in |
| Maximum Inlet Temperature | 120°F |
| Voltage | 230/460 V |
