• 100% Outdoor Air

• Precooling

• Humidity Control

• Free Reheat

2

The Wringer – Mechanical Dehumidifier

The key element of the Wringer is an efficient plate or heat pipe air-to-air heat exchanger. The airstream makes two passesthrough the heat exchanger. In the first pass, the warm, humid air is pre-cooled (T1 to T2, see Figure 1b), reducing refrigerationrequirements by up to 50%. In the second pass, the air is reheated (T3 to T4), reducing or eliminating the need for supplementalreheat. Because the heat exchanger is a passive element, it does not appreciably add to the system complexity or maintenancerequirements. Typically designed to deliver dry air at 50°F dew point or lower, and at a relatively neutral dry bulb condition, theWringer offsets building internal latent loads and controls building humidity levels without affecting space temperature. Whenpurchased with return air damper option, the Wringer may be used to control building humidity levels during unoccupied hours bydrying recirculated air from the space – an extremely efficient and practical dehumidification strategy. If chilled water units areused in conjunction with the Wringer, then the chiller can be shut down during unoccupied periods and only the DX Wringers willoperate to control space conditions.

A - Heat Pipe Heat ExchangerB - S/A Fan with Motor and DrivesC - S/A Filter Bank (30% Pleated)D - O/A Hood with Birdscreen

E - O/A Shut-off DamperF - Cooling Coil (Direct Expansion)G - Unit Access Door (Typical)H - Unit Bolt-on Panel (Typical)

J - Air Cooled Condensing Unit(ACCU)

K - Unit Electrical Panel

Major ComponentsA - Wrap-Around Heat ExchangerB - S/A Fan with Motor and DrivesC - S/A Filter Bank (30% Pleated)D - O/A Shut-off Damper

E - Cooling Coil (Direct Expansion)F - S/A Filter Bank (85% Pleated)G - Unit Access Door (Typical)H - Unit Bolt-on Panel (Typical)

J - Unit Electrical PanelK - O/A Hood with Birdscreen

Major Components

O/A: Outdoor AirS/A: Supply Air

O/A: Outdoor AirS/A: Supply AirR/A: Return AirE/A: Exhaust Air

Plan View - Roof Removed Plan View - Roof Removed

Figure 1a. Wringer Psychrometrics

Figure 1c. Air-Cooled Wringer Schematic with Straight Heat Pipe Figure 1d. Wringer with Wrap-Around Heat Pipe and Separate Condenser Unit

Figure 1b. Wringer with Straight Heat Pipe Heat Exchanger

DES CHAMPS PRODUCTS

3

The Wringer Plus – Energy Recovery with Mechanical Dehumidifier

Offering all of the benefits and features of the Wringer, the Wringer Plus goes a step beyond to reduce winter heating and summermechanical cooling requirements through efficient recovery of energy from building exhaust air. Designed to deliver filtered, dehu-midified outdoor air while allowing building pressure to be controlled (using the system's exhaust/relief fan) – all whileminimizing heating and cooling requirements through efficient air-to-air energy exchange. The Wringer Plus provides the ultimateinternal air quality solution in humid climates. Wringer Plus systems generally require the minimum supplemental cooling andheating capacities of the many available dehumidification options, allowing for chiller and boiler plant downsizing relative to otherdesigns. It should not come as a surprise to learn that Wringer Plus systems also have the ability to save the most energy on anannual basis. In fact, the Wringer Plus, in many cases, requires less energy to condition outdoor air than would be required tocondition recirculated air.

Available in sizes from 1,000 to greater than 50,000 CFM, with options typical of the Wringer, and including any combination ofstraight heat pipe, wrap-around heat pipe, total energy recovery wheel, and sensible plate heat exchangers. The Wringer andWringer Plus are equipped with fully factory mounted and tested DDC control systems as standard equipment.

Dehumidificatio

n Load

A - Enthalpy Wheel Heat ExchangerB - S/A Fan with Motor and DrivesC - E/A Fan with Motor and DrivesD - S/A Filter Bank (30% Pleated)E - E/A Filter Bank (30% Pleated)

F - O/A Shut-off DamperG - E/A Shut-off DamperH - O/A Hood with BirdscreenJ - E/A Hood with BirdscreenK - Unit Access Door (Typical)

L - Unit Bolt-on Panel (Typical)M - Unit Electrical PanelN - Heating Coil (Hot Water)P - Cooling Coil (Chilled Water)Q - Heat Pipe Heat Exchanger

Major ComponentsA - Heat Pipe Heat ExchangerB - Heat Wheel Heat ExchangerC - S/A Fan with Motor and DrivesD - E/A Fan with Motor and DrivesE - S/A Filter Bank (30% Pleated)F - S/A Filter Bank (85% Pleated)G - E/A Filter Bank (30% Pleated)

H - O/A Hood with BirdscreenJ - E/A Hood with BirdscreenK - O/A Shut-off DamperL - E/A Shut-off DamperM - Heat Pipe By-pass DamperN - Recirculation DamperP - Cooling Coil (Direct Expansion)

R - Heating CoilS - Unit Access Door (Typical)T - Unit Bolt-on Panel (Typical)V - Water-Cooled Condensing

Unit (WCCU)W - Unit Electrical Panel

Major Components

O/A: Outdoor AirS/A: Supply AirR/A: Return AirE/A: Exhaust Air

O/A: Outdoor AirS/A: Supply AirR/A: Return AirE/A: Exhaust Air

Plan View - Roof Removed Plan View - Roof Removed

Figure 2a. Wringer Plus Psychrometrics

Figure 2c. Wringer Plus Series with Enthalpy Wheel,Dehumidification Coil, and Heat Pipe

Figure 2d. Wringer Plus Modular Unit with Enthalpy Wheel,Dehumidification Coil, and Heat Pipe

Figure 2b. Wringer Plus Schematic Illustrating Arrangement of Enthalpy Wheel,Dehumidification Coil, and Heat Pipe

225 South Magnolia Avenue • Buena Vista, VA • 24416540.291.1111 • Fax 540.291.2222 • marketing@des-champs.com • www.des-champs.com

Wringer_3_07/2.5M © 2007 Des Champs Technologies

DES CHAMPS PRODUCTS

Typical Wringer Application

• Available in sizes from 1,000 to greater than 100,000 cfm• Chilled water or direct expansion coils• Integral or remote air-cooled condensing units with multiple

scroll compressors• Integral water-cooled condensing units with multiple

scroll compressors• Hot water, steam, or electric heating coils• Hot-gas reclaim coils• Indirect-fired gas heat with minimum 10:1 turndown• Direct-fired gas heat with 20:1 turndown or greater

• Special filtration to meet job specific requirements• Humidification for winter humidity control• Factory programmed DDC controls• Corrosion resistant coatings for process or seacoast applications• Outdoor and recirculation dampers• Heat exchanger face and bypass air dampers for regulating

supply air reheat• Variable frequency drives or inlet guide vanes for air volume control• Special fan and motor options• Roof curb

• 100% outdoor air• Summer humidity control• Plenum fans for quiet

operation• Medium efficiency filters• Access doors to internal

components

• Factory wired electricalcomponents with disconnect

• Heavy gauge, double-wall,weatherproof housing

• High efficiency air-to-airexchanger

• Sloped drain pans

• Includes all of the Wringerfeatures

• Integral exhaust air fan

• Summer energy recovery• Winter heat recovery• Building pressure control

Sample of Options

Wringer Features Wringer Plus Features