DEHUMIDIFIER DehuTech 2400 Technical Manual Valid from serial no: 690502 © 2005 DehuTech AB
EC-declaration of conformity Fuktkontroll AB Enhagsslingan 23 187 40 TÄBY Sweden declare under own responsibility that the product: Dehumidifier DehuTech 2400 (type DA-2400 in Swedish market) from unit no 690502 which is detailed in this declaration complies to the following harmonised European standards and technical specifications: SS-EN 60335-1 issue 2 Electrical domestic appliances - general requirements SS-EN 60335-2-40 issue 1 Specified requirements for electrical heat pumps, air conditioning units
Contents General safety information..........................................................................................................................4 Applications..................................................................................................................................................5 Method of operation.....................................................................................................................................5 Product description.................
General safety information • Anyone operating the DehuTech 2400 should have access to this manual, and should be aware of the safety information. • Only personnel with adequate knowledge of the dehumidifier should be allowed to operate and service it. • Only personnel with authorisation for electrical installations are allowed to make repair of electrical components. • The service panels should remain closed except when servicing is carried out.
Applications Method of operation Dehumidifier DehuTech 2400 is of the solid desiccant wheel type designed to dry air of atmospheric pressure. The dehumidifier can be used for drying air of up to 100 % relative humidity (RH) with temperatures from -30 ºC to +40 ºC. The dehumidifier operates with two air streams. A larger air stream to be dehumidified, and a smaller air stream to exhaust the moisture out of the desiccant rotor. The applications are numerous and wide spread.
Product description The dehumidifier is designed to meet the requirements of IEC protective class IP 44. Casing The casing is fabricated from stainless steel 2333. The top of the dehumidifier has a top panel that can be removed for service access to the electrical components. The front panel of the dehumidifier can be removed for service access to all mechanical parts. All duct connections to the dehumidifier are designed for connections to standard size spiral ducts.
Installation Installation and service access Reactivation air into the dehumidifier Dehumidifier DehuTech 2400 is designed for indoor installation, and must be installed in a upright position, preferably bolted to the floor. For inspection and service, a space of 800 mm must be left free in front of the dehumidifier to accommodate for servicing of filters, fans and rotor. The reactivation air duct into the dehumidifier should be as short as possible.
Commissioning On initial start up, the following steps should be taken in this order: 1. Ensure that the external isolation switch is isolating the unit from the mains, and that the main switch on the dehumidifier is set in the OFF position. 2. Open the service panels of the dehumidifier and ensure no foreign objects are left inside the unit or in the electrical compartment 3. Ensure that the dry and wet air dampers are open, and that ducts are clean and free of blockages. 9.
Maintenance NOTE ! With all maintenance and service of the dehumidifier: • Switch off the dehumidifier approximately 15 minutes prior to opening any service panel, allowing the heater to cool down. • Disconnect the dehumidifier from main electrical supply by turning the external switch to the off position. The maintenance intervals for the dehumidifier depend on the surrounding environment and installation site. Recommended maintenance intervals could therefore differ from one installation to another.
General summary of maintenance intervals Filter On demand Rotor Bearing Motors Rotor drive Heater √ √ Every 6th month Every 12th month Sealings √ √ √ √ Transportation Observe the following for transport or handling of the dehumidifier: • Check the dehumidifier on delivery for any transport damage. • The dehumidifier should be protected from rain and snow. • The dehumidifier should always stand upright on its feet. • Never put other goods on top of the dehumidifier.
Fault finding Malfunction Possible cause of trouble Corrective action None, or reduced dehumidification capacity Filter clogged Clean or replace filters Electrical heater faulty Check fuses Airflow reduced Check openings and dampers No rotation of rotor Check belt tensioning Internal leakage in unit Check sealings and springs Altered air volumes Measure and check air volumes Altered reactivation temperature Check reactivation heater Air leakage Check panels and check seals Fan faulty
Technical data Performance chart CAPACITY DIAGRAM 20 15 20 tp=30°C 10 15 tp=20°C 5 Temperature rise (oC) XT (g/kg) 25 10 tp�10°C 0 5 0 5 10 15 XP (g/kg) 20 EXAMPLE: Process air: xp = 9,0 g/kg, tp = +20°C giving Dry air: xT = 3,3 g/kg, tT = 20+20 = 40°C Subject to change without notice DehuTech 2400
Dimensions The image above is a right-hand unit. Technical data Dehumidification capacity 16,4 kg/h (at +20 ºC and 60 % RH. See performance chart for other data) Dry air flow (at 250 Pa available pressure) 2 400 m3/h Wet air flow (at 410 Pa available pressure) 800 m3/h Power supply (3 x 400 V, 50 Hz) 25 kW Current (A / phase) (connection fuse: 50 A / phase) 37,5 A Weight 190 kg Max noise level 75 dB(A) Note: Valid only for standard units, with standard air-flows.
Spare parts list Part Technical specification Drive motor No installed No of recommended spare parts Gearmotor 230-240 V 50 Hz, low temp grease 1 1 Capacitor 0,5 µF 700 V 1 Belt pulley 18 H 075 1 Drive belt 850 H 075 1 Belt tensioner Comment 1 Process air fan MB 22/9 T2M 2,2 kW 1 Wet air fan MB 20/8 T2K 1,1 kW 1 Heater Electrical 1 Rotor PPS 2400 1 Process air filter Corrugated paper filter 715 x 494 x 45 mm 1 2 Reactivation air filter Metal frame filter 300 x 300 x
Component data Unit part: Process air side Reactivation air side (Dry air side) (Wet air side) AirVac AirVac MB 22/9 T2M MB 20/8 T2K 2 850 2 750 RD RD m3/h 2 400 800 Head pressure Pa 1 000 1 000 External pressure available Pa 250 410 Marin & Maskin AB IEC Rotek 1 AT 90 L-2 80 T2 1.
Continued from previous page. FILTERS Corrugated paper Metal frame Filter class EU-5 EU-3 Filter media Glass fibre Metal Type Dimensions mm 1p. 715 x 494 x 45 1p.
Miscellaneous / Notes DehuTech AB Enhagsslingan 23 S-187 40 TÄBY Sweden Tel: Fax: E-mail: Website: +46 8 792 04 08 +46 8 792 55 59 info@dehutech.com www.dehutech.
Appendix 1 - Electrical wiring Subject to change without notice DehuTech 2400
