The product to which this manual refers must not be supplied, installed, used, operated or serviced until the contents of the manual has been fully read and understood by all relevant personnel. Please complete the following information at the time of installation found on the rating label on the upper right hand side of dryer Model Number Serial Number...
Contents Safety Safety Guidelines Symbols General Description Function of the Dryer Package Contents Mechanical Installation Electrical Installation Operation Start-Up Shut Down Maintenance Servicing Purge Plug Exhaust Replacing Shuttle Valves Energy Management Troubleshooting Technical Data Component Parts Spares Information Warranty...
Section 1: Safety Safety The following safety guidelines must be • If carrying out installation work above head height, use strictly observed. suitable and safe working platforms or other means of working access. • Do not make any constructional changes to the product. •...
Section 1: Safety Figure 1.1: Definition of symbols Manual Handling As with all areas of the workplace, Health and Safety is of great importance and must be given due care and attention. While working with this equipment, manual handling regulations must be considered and adhered to. Full advice, support and guidance should be detailed in your Health and Safety Policy and Manual Handling guide, please take the time to familiarize yourself with these documents.
Section 2: General Description General Description This manual is valid for the following dryer models ACC 4 ACC 6 ACC 8 ACC 10 ACC 15 ACC 25 ACC 35 Function of the Dryer The dryer is designed to provide a smooth, controlled and uninterrupted delivery of dry compressed air.
Section 2: General Description Package Contents The dryer is delivered in protective packaging. Take care when transporting, loading and unloading the unit. The package contains the following items (refer to figure 2.1): Figure 2.1: Package contents DRYPOINT ACC DRYER INSTRUCTION MANUAL 04 1705 001 01 Ra TUBING CLEARPOINT FILTER...
Section 2: General Description Figure 2.2: Models 4 SCFM – 35 SCFM 1. Top valve assembly 9. Pressure housing retaining bolt 17. Exhaust silencer 2. Control unit 10. Desiccant cartridge (comes with dust filter) 18. Purge plug 3. Bottom valve assembly 11.
Section 3: Mechanical Installation Mechanical Installation Connecting the pre-filter to the dryer Figure 3.1: Connecting pre-filter • 4 SCFM – 35 SCFM, Utilize O-ring and bolts supplied to assemble filter as per figure 3.1. • Fit 5/32” (4mm) tubing to filter and dryer’s built-in drain valve inlet.
Section 3: Mechanical Installation Orientation Figure 3.3: Horizontal orientation The dryers are designed to operate in both vertical and horizontal orientation. Figure 3.4: Vertical orientation Heatless Desiccant Dryers | Instruction Manual...
Section 3: Mechanical Installation Reconfiguration of the inlet / outlet ports Figure 3.5: Inlet/outlet ports 4 SCFM – 35 SCFM models The dryer provides a choice of 3 inlet ports (A, B & C) and 3 outlet ports (D, E & F). Any inlet or outlet port may be used. Make sure the remaining two inlet or outlet ports are blanked off using provided pressure plugs.
Section 3: Mechanical Installation Figure 3.7: Level ground Figure 3.8: Drainage (all tubing should be secured up to the point of drain to prevent whipping during discharge) Heatless Desiccant Dryers | Instruction Manual...
Section 3: Mechanical Installation Figure 3.9: Location Figure 3.10: Hard piped installation Figure 3.11: Exposure to heat Max 122 >Max 122 Max 122 Max 122 >Max 122 >Max 122 Max 122 >Max 122 Max 122 >Max 122 Max 122 >Max 122 Heatless Desiccant Dryers | Instruction Manual...
Section 3: Mechanical Installation Figure 3.12: Direction of flow Figure 3.13: Typical installation To prevent back flow into the dryer a non-return valve should be placed in-line, downstream of the dryer. This is essential when more than one dryer is used in a single application. Heatless Desiccant Dryers | Instruction Manual...
Section 4: Electrical Installation Electrical Installation Connection Power Supply The dryer is designed to operate on either AC or DC supply Supply voltage. Electrical wiring must comply with local regulations. Voltage 12 VDC 0.80 requirements must be confirmed to be within the specification 24 VDC 0.40 on the dryers rating plate.
Section 4: Electrical Installation Different voltage setting Figure 4.2: Wiring diagram AC POWER SUPPLY (Open Connection From Factory) INPUT L1 (100 - 240 VAC) N or L2 (100 - 240 VAC) Not used Controller Controller Earth Front Rear DIN Connector DC POWER SUPPLY (Blanked off From Factory) (Attached to Power cord from factory)
Section 4: Electrical Installation Controller Description Controller Specification Ambient temperature 35°F to 122°F (1.5°C to 50°C) Max. relative humidity 80% up to 87.8°F, decreasing linearly to 50% RH at 122°F Input voltage range 100–240VAC, 50–60Hz, 12–24VDC Mains supply voltage not to exceed ±10% of nominal Protection class IP65 Transient over voltage...
Section 5: Operation Operation Background / Function of the dryer a. After 120 seconds, tower LED X switches off and drain LED Z illuminates green. b. After a further 50 seconds drain LED Z switches off and The dryer operation is designed to give smooth, uninterrupted tower LED Y illuminates green.
Section 5: Operation Shut-down Procedure • Close valve B. • Close valve A. • Leave dryer running for 15 minutes to fully depressurize. • Switch off all electrical power to the dryer. Under no circumstances must compressed air be allowed to flow through the dryer following switch off of electrical power.
Section 5: Operation Figure 5.3: Initial Pressurization (Power O ) Figure 5.3: Initial Pressurization (Power Off) With power off to the dryer, both towers pressurize to line pressure. The N.C., 2/2 solenoid valves are both de-energized. Air pressure on the outside of the diaphragm increases as air flows through the tiny bleed hole in the diaphragm.
Section 5: Operation Figure 5.4: Stage 1: Left Tower Purging, Right Tower Drying Figure 5.4: Stage 1: Left Tower Purging, Right Tower Drying The left solenoid is energized allowing air on the outside of the diaphragm to vent through the solenoid valve to atmosphere. As air pressure on the outside of the diaphragm drops, the diaphragm is pushed away from the valve seat by the internal air pressure of the dryer and air rushes out the silencer as the left tower depressur- izes.
Section 5: Operation Figure 5.5: Stage 2: Repressurization Figure 5.5: Stage 2: Repressurization At completion of Stage 1, the left solenoid valve is de-energized. Air pressure on the outside of the right diaphragm increases as air flows through the tiny bleed hole in the diaphragm.
Section 5: Operation Figure 5.6: Stage 3: Left Tower Drying, Right Tower Purging Figure 5.6: Stage 3: Left Tower Drying, Right Tower Purging The right solenoid is energized allowing air on the outside of the diaphragm to vent through the solenoid valve to atmosphere. As air pressure on the outside of the diaphragm drops, the diaphragm is pushed away from the valve seat by the internal air pressure of the dryer and air rushes out the silencer as the left tower depressuriz- The shuttle valves move to the lower pressure (right) side and seal off against the main process flow.
Section 5: Operation Figure 5.7: Repressurization Figure 5.7: Repressurization At completion of Stage 3, the left solenoid valve is de-energized. Air pressure on the outside of the left diaphragm increases as air flows through the tiny bleed hole in the diaphragm. The air pressure on the outside of the diaphragm quickly equalizes with the internal air pressure of the dryer allowing the small spring on the outside of the diaphragm to press the diaphragm against its seat, keeping air from exiting the silencer.
Section 6: Maintenance Maintenance Figure 6.1: Models 4 SCFM – 35 SCFM Servicing Important information. Ensure shutdown and start-up procedures are followed prior to carrying out any maintenance work on the dryer. The manufacturer will not accept responsibility for physical injury, damage or delays caused by failure to observe the instructions in this manual and manuals provided with your equipment.
Section 6: Maintenance Desiccant Changeout Figure 6.5: Models 4 SCFM – 35 SCFM with pre-filter removed Models 4 SCFM – 35 SCFM 1. See figure 6.5. 2. Remove prefiltration. 3. Unscrew four bolts ¾ turn on the opposite tower to aid desiccant changeout process.
Section 6: Maintenance Resetting the Controller Figure 6.9: Controller reset • After following the start-up procedure it is necessary to reset the controller. This is done by using the re-set disc (supplied with cartridge service kit) then: • Hold the disc against the blue pad on the front display of the dryer panel for 5 seconds.
Section 7: Energy Management Energy Management Overview devices mentioned as they might be connected for use in controlling a dryer’s purge function. Please note that specific details differ between device manufacturers, so in all cases the Regenerative dryers must expel a portion of the process air manufacturer’s specifications should be adhered to.
Section 7: Energy Management Figure 7.2: Using a standard pressure switch for Purge Control. Using a Standard Pressure Switch for Purge Control Many compressors come equipped with pressure switches with extra contacts that can be utilized to switch off the dryer’s purge when the compressor is in an unloaded state.
PIN 2 PIN 1 (puts out +5 VDC signal) MANUAL SWITCH (Field Installed) Section 7: Energy Management N.C.* SIGNAL OUT SIGNAL BACK * Normally Closed, open to turn purge off Fig 7.3 Pressure switch setting ADJUST TO SUIT SYSTEM (pressure switch deactivation point) PURGE OFF (switch activated) PURGE OFF (switch activated) DRYER...
RELAY SIGNAL OUT N.O. N.C.* SIGNAL BACK Section 7: Energy Management * Normally Closed, open to turn purge off Using a Dew Point Transmitter and Process Controller Figure 7.5: Using process controller for Purge Control The best option for purge control if the delivered dryness DC POWER PROCESS (pressure dew point) of the air from the dryer is critical.
Section 7: Energy Management Figure 7.6: connecting to EM port Installation • Make the connection at the switch end first. This way you can check continuity at the dryer end before connecting to the dryer. Make sure that the contacts on the switch are normally closed.
Section 7: Energy Management Figure 7.8: Remote alarm wiring diagram Alarm External Power Source Remote fault alarm: - A remote alarm relay is built into the controller. This facilitates the activation of a remote audible or visual indicator. The alarm can be set to activate at the service interval and/or after a pre-defined number of electrical faults.
Section 8: Troubleshooting Troubleshooting General troubleshooting Before specific identification of any fault is looked for, the following general points must be verified: • Has the unit been damaged externally or are any parts missing? • Is power being supplied to the unit? •...
Section 8: Troubleshooting Troubleshooting: Electrical Problem Possible Cause Display Priority Location Action No dryer function No power supply None Check supply Incorrect dryer Left solenoid open or short Flashing red X LED Replace solenoid valve operation circuit Right solenoid open or short Flashing red Y LED Replace solenoid valve...
Section 8: Troubleshooting LED Controller Display Status LED Signal Description Power off Left-hand tower purge cycle Repressurization cycle Right-hand tower purge cycle Repressurization including drain Service warning every 11,500 hours Heatless Desiccant Dryers | Instruction Manual...
Section 8: Troubleshooting LED Controller Display Status LED Signal Description Service due every 12,000 hours Right-hand solenoid fault Left-hand solenoid fault Drain valve fault Controller fault Low power fault Heatless Desiccant Dryers | Instruction Manual...
Section 9: Technical Data Technical Data Environmental Conditions All dryers are designed to be safe under the following conditions: • Indoor use • Altitude up to 6560 ft. • Ambient temperature 41°F (5°C ) to 104°F (40°C) • Maximum RH 80% for temperatures up to 87.8°F (31°C), decreasing linearly to 50% RH at 104°F (40°C) •...
Section 11: Spares Information Spares Purge Plug Identification Each dryer is set with the appropriate purge plug for the operating pressure specified at point of order. The purge plug fitted on the unit will be identified on the purge plug label, located underneath the rating plate on the right. If the inlet pressure to the dryer is adjusted to operate at an alternative working pressure other than initially specified, please contact the manufacturer and order an appropriate purge plug (identified in the table below).
Section 11: Spares Information Service kits 6,000 hours or Annual Maintenance Kit Dryer Model Kit Part Number (with float drain) Kit Part Number (with BEKOMAT ® Description Change-Out Period ACC 4 - ACC 35 4048821 4022723 Pre-filter replacement element and drain service kit Every 6,000 Hours or 1 Year 12,000 hours or 2 years, Maintenance Kit A ®...
Section 12: Warranty Warranties and liabilities Claims for warranty and liability concerning personal injury or material damage are excluded if they resulted due to one or more of the following factors: • Inappropriate use. • Inappropriate application of the dryer. •...
BEKO TECHNOLOGIES CORP. 900 Great SW Parkway, Atlanta, Georgia 30336, USA +1 (800) 235-6797 Phone +1 (404) 629-6666 Fax firstname.lastname@example.org www.bekousa.com BEKO reserves the right to make changes and improvements to the product and/or this manual without prior notice. 1340-BEK-710-01 3/22...