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Energy Savers

Gardner Denver RCD cycling refrigerated dryers provide stable 33–39°F pressure dew point control with automatic energy savings operation. Cold energy storage system is precision engineered to guarantee that the refrigeration compressor uses no energy for at least 10 minutes during every cycle.

The controller continuously monitors the cold energy solution temperature to maintain the dew point selected and maximize energy efficiency. Ample solution volume and temperature controls ensure the continuous delivery of dry compressed air long after the refrigeration compressor has turned off.

Voltage: 208–230/1/60 available on RCD200–600 models. 208–230/3/60 additional charge on RCD3250–12000 models. 575/3/60 additional charge on all models.
De-rate dryer capacity by 17% for 50 Hz.
Standard dryer enclosures and controls meet NEMA1.
For 208–230/3/60 incoming power applications, purchase 230/1/60 and simply drop a leg at installation (200–600 only.)
Models 200–600: Maximum operating pressure 225 psig; Maximum inlet temperature 120°F
Models 3250–12000: Maximum operating pressure 150 psig; Maximum inlet temperature 130°F; ASME pressure vessel; UL listed refrigeration and electrical components; CSA listed electrical components
Unit of Measure

Specifications

Flow

 N/A 6250

Pressure Drop

 N/A 5.0

Average Power

 N/A 19.2 kW

Required Cooling Water Flow at 85°F

 N/A 53.6 gpm

Water Conn In/Out FLG/MPT

 N/A 2 in

Compressor

 N/A 30 hp

Height

 N/A 90 in

Width

 N/A 66 in

Base-Mounted Length

 N/A 160 in

In/Out Connection

 N/A 8 in

Weight

 N/A 15150 lb

Operating Conditions

Max Working Pressure Range

 N/A 30 to 150 psig

Inlet Temp. Range

 N/A +40 to 130 ºF

Ambient Temp. Range

 N/A +40 to 120 ºF

Cycling Technology

N/A RCD Series is top of the line cycling technology available in 200–600 and 3,250–12,000 scfm.

  • Precision engineered for dew point performance and energy efficiency
  • Low operating cost—Cycling performance RCD series dryers store and actively circulate cooling energy allowing the dryer’s refrigeration compressor to maintain long off cycle
  • Rugged construction—High quality components make the RCD easy to access and maintain
  • Energy efficient cycling operation matches energy costs to actual plant air demands
  • Environmentally friendly refrigerant—R507 in models 200–600 scfm and R-22 in models 3,250–12,000 scfm, both efficiently absorb heat loads
  • Polyethylene tank is lightweight and durable. The tank is double walled, polyethylene filled with highly efficient foam to ensure maximum glycol insulation. Tanks are precision molded (no seams) to prevent leaks
  • Heavily insulated seamless Cold Energy Storage reservoir provides superior temperature stability
  • Proprietary smooth bare, copper heat exchangers for fast efficient heat transfer
  • Models RCD 200–600 have precision-fit steel cabinets with easy access panels and are coated inside and outside with durable powder paint for protection and aesthetic
  • Consistent 33°F–39°F dew points under all rated flow conditions
  • Cold energy storage system reduces compressor run time to gain long component life
  • Selectable dew point settings increase energy savings

    • System Features Models 200–600

    N/A RCD 200–600 scfm
    Energy Management Controler (EMC) functions

  • Selectable membrane switches
  • LED text display
  • Warm up delay after power loss
  • Auto drain valve open/close LED
  • Fahrenheit or Celsius temperature selection
  • High & low temperature alarm LEDs
  • Set auto drain open time (seconds)
  • Set auto drain closed time (minutes)
  • Percent of energy savings
  • Timed drain valve
  • CFC-free
  • Selectable dew point temperatures to 50°F

    Operation - Models 200–600
    Compressed air, saturated with water vapor; enters the air-to-air heat exchanger (A) where it is chilled by the cold dry outgoing air. It then enters the air-torefrigerant heat exchanger; which is immersed in a cold water/glycol solution inside the Cold Energy Storage reservoir (B). The cold water/glycol solution lowers the dew point temperature to condense the water vapor into a liquid. An integral moisture separator (C) collects the condensate for removal by the automatic drain valve (D). Cold dry compressed air is reheated by the incoming compressed air before exiting the dryer.

    An environmentally friendly HFC refrigerant system chills the solution inside the Cold Energy Storage reservoir. The Energy Management Control [EMC] (E) maintains the Cold Energy Storage solution temperature (F) to within a 1°F differential. The refrigeration compressor (G) automatically starts-and-stops as needed to match the air demands and save energy.

    • System Features Models 3,250–12,000

    N/A RCD 3,250–12,000 scfm
    System Operation Monitor functions

  • Normal operation LED
  • Check operating conditions LED; temperature inside the evaporator is too high
  • Service due LED; indicates when routine maintenance should be performed, temperature sensor probe is sensing temperature outside of normal range or it has failed
  • System alarm LED; inlet air temperature is too high, refrigerant suction temperature is too low, ambient air temperature is too low, ambient air temperature is too high
  • Inlet air temperature
  • Refrigerated suction temperature
  • Glycol solution temperature
  • Cooling water temperature
  • Remote dry alarm contacts
  • Dual electronic timer drains
  • RS - 232 port
  • Fahrenheit or Celsius temperature selection
  • Schematic with lights that indicate location of temperature sensors

    Operation - Models 3,250–12,000
    Warm saturated air enters an air-to-air heat exchanger, where it is cooled by outgoing cold air. The inlet air is further cooled in the glycol chiller (air-to-glycol solution heat exchanger). Cooling condenses entrained moisture which is then removed from the airstream by a centrifugal separator and discharged from the dryer by an automatic drain valve. The cold air is reheated by incoming warm air as it passes back through the airto- air heat exchanger. Using the outgoing air to pre-cool the inlet air condenses up to 65 percent of the moisture out of the inlet air before it reaches the chiller. Precooling the inlet air also significantly reduces the heat load on the refrigerant compressor, permitting the use of a smaller refrigerant compressor.