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Table of Contents
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Summary of Contents for Master DHA 250
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Page 2: Table Of Contents
Rotor drive belt...............................10 General summary of maintenance intervals......................11 Transportation............................11 Fault finding...............................12 Technical data.............................13 Performance chart..............................13 Dimensions................................14 Technical data.................................14 Noise data................................15 Symbols................................15 Noise path................................15 Noise data................................15 Spare parts list............................16 Electrical wiring............................17 Electrical components..........................18 Miscellaneous / Notes..........................19 Subject to change without notice DHA 250... -
Page 3: General Safety Information
General safety information • Anyone operating the DHA 250 should • The service panels should remain closed have access to this manual, and should be except when serviceing is carried out. aware of the safety information. • The dehumidifier can only be used for dehu- •... -
Page 4: Applications
Applications Method of operation Dehumidifier DHA 250 is of the solid des- The dehumidifier operates with two air streams. iccant wheel type designed to dry air of atmos- A larger air stream to be dehumidified, and a pheric pressure. The dehumidifier can be used... -
Page 5: Product Description
The rotor shaft is made from stain- less steel. The complete rotor part can easily be removed and lifted as one piece out from the casing. Filter The dehumidifier has one common filter for process- and reactivation air. Subject to change without notice DHA 250... -
Page 6: Installation
Reactivation air into the dehumidifier Installation and service access For reactivation of the dehumidifier an addi- Dehumidifier DHA 250 is designed for tional air volume is needed. This air enters the indoor installation. The dehumidifier should be unit along side the process air. As an option the installed horizontally. -
Page 7: Temporary Installation
Electrical installation See the electrical wiring diagram on page 17. Subject to change without notice DHA 250... -
Page 8: Commissioning
ON, or alternatively connect the power plug to the socket. See the electrical wiring diagram on page 17. Subject to change without notice DHA 250... -
Page 9: Maintenance
Cleaning with water is no routine matter, please contact distributor prior to this procedure. Check the rotor bearing and the rotor surface once a year. Subject to change without notice DHA 250... -
Page 10: General Summary Of Maintenance Intervals
• The dehumidifier should be protected from rain and snow. • The dehumidifier should always stand upright on its feet. • Transport and lift the dehumidifier by the two handles on each side of the transportation box. Subject to change without notice DHA 250... -
Page 11: Fault Finding
Check centre shaft, rim of rotor Drive motor faulty Replace complete gear motor No dry- or wet air volume Filter clogged Clean or replace filters Fan faulty Check fan, motor and impeller Ducts blocked Check dampers and ducts Subject to change without notice DHA 250... -
Page 12: Technical Data
Technical data Performance chart CAPACITY DIAGRAM =30°C =20°C �10°C (g/kg) EXAMPLE: Process air: x = 9,0 g/kg, t = +20°C giving Dry air: x = 6,1 g/kg, t = 20+8,5 = 28,5°C Subject to change without notice DHA 250... -
Page 13: Dimensions
290 m (freeblowing) Wet air flow 80 m (freeblowing) Power supply 1,4 kW (1 x 230 V, 50 Hz) Current 6,1 A (connection fuse: 10 A) Weight 18 kg Noise level 61 dB(A) Subject to change without notice DHA 250... -
Page 14: Noise Data
Total noise level in dB(A) (rel. 10 Noise power level in octave band dB(A) (rel. 10 Correction for calculation of LWAO (L + K) dB(A) = Noise power level at room condition R = 10 Subject to change without notice DHA 250... -
Page 15: Spare Parts List
Filter AAF R29 EN779:G3 220 x 330 mm Toggle switch 2x1 pol. electric switch Ampere meter RQ48E 10A IP 54 Cord H07RNF/3 x 1,5 Process air duct con- 2 x Ø80 Option nection Subject to change without notice DHA 250... -
Page 16: Electrical Wiring
Electrical wiring Subject to change without notice DHA 250... -
Page 17: Electrical Components
5.08/4 sn or Weidmüller AB Blind panel, 48 x 48 11110 Tälje mätinstrum. Blind plug, 22,0-25,5 mm P208/4 OEM Component Cord, H07RNF/3G1.5/3,5m 2440032 OEM Component Runtime meter Humidistat plug connection *) Option Subject to change without notice DHA 250...