5.2.2 AUTO mode – automatic level control ......14 5.2.3 Adjusting the level sensor ..........15 5.2.4 Setting the time relay ............15 5.2.5 Setting the level relay ............15 5.3 Backwash system ..............15 5.4 Drum rotation ................15 5.5 Re-tightening of bolts ..............15 Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
Page 3
B. Spare parts list C. Dimensional drawing d. Circuit diagram for control system (optional) E. Control cabinet component list (optional) F. The gear motor G. Backwash Strainer (optional) H. Backwash pump (optional) I. Frequency converter Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
PREFACE This manual comprises instructions for operation and maintenance of Hydrotech Discfilter HSF31-series. The manual should always be available to the personnel who work with the equipment. It is important that: The manual and other applicable documents are preserved during the whole life span of the equipment.
Directive of EU 98/37/EU (AFS 1994:48). 1.3.Redesigned.equipment. The CE marking does not cover components not approved by Hydrotech AB, used in redesigning or rebuilding of the equipment. Warning signs and the CE marking shall be placed fully visible. If any part of the equipment with a sign is being replaced, a new sign must be attached at the same place.
The vapours from the backwash water may also contain harmful substances. Use suitable personal protection according to local regulations. Measured noise level from the filter is less than 74 dB(A). If necessary, use suitable personal protection according to local regulations. Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
2..HYdROTECH.dISCFIlTER.3100-SERIES 2.1.Overview Control cabinet (optional) Backwash pump (optional) Drive unit INLET SIDE MOTOR SIDE Disc Filter Piping segment (optional) Figure 2.1 Parts of Discfilter HSF31-series Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
The filter designator definitions are: HSF 31 10 / 8 -2 F Type of microscreen filter Model HSF = Hydrotech Disc Filter H = Aquaculture model F = Industrial model Drum diameter incl. discs 31 = 3100 mm...
(operational) site. WARNING! Before unloading, the working area should be fenced off according to Figure 3.3 Lifting points for filters local regulations to prohibit access by without tank (type 2/3) unauthorised persons. Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
6 expansion-shell bolts. Check the alignment of the drum. The distance between inlet side (the open side) of the drum and the filter frame should be approx. 10 mm. Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
(see Appendix A & D). 4.4.Equipotential.Earth.Bonding The Hydrotech Discfilter and its associated equipment should be protected using a suitable Equipotential Earth Bonding system. This is very important to avoid galvanic corrosion. Typically use a cable with an area of 10-16 mm .
Thoroughly check that no rinse nozzles are clogged. Any particles in the rinse water supply must be removed. A standard in-line strainer can normally be used to remove particles (see section 7.7). Figure 4.6 In line strainer (optional) Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
8. Open the main valve completely. The filter is now running in automatic level control mode. It may be needed to adjust the level sensor to make the filter run optimally (see section 5.2.2). Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
3s ramp up and min. 1s ramp down. The filter operates with 50 Hz as standard. If the filter is equipped with a Hydrotech standard control, the filter has two operation modes: 1. Continuous rotation (HAND mode) 2.
380 mm. The filter can withstand maximum pressure for a limited period of time and only if the filter is stationary. If a constant water level inside the drum is required, the filter should run continuously (HAND mode). Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
1.4 mm. For some applications it may be necessary to use a lower rinse water flow. This can be achieved by installing nozzles with a smaller opening size. Contact the supplier or Hydrotech for more information. The backwash system pressure is set to 7-8 bars.
The filter is not a pressure vessel. 6.2.Non-foreseen.use If not approved by Hydrotech, the filter may not be used for other liquids than water. The filter must not be installed in an area where there is an explosive atmosphere or any other risk of explosion, e.g.
7.1.1.Removing.and.cleaning.the.spray.nozzles 1. Set the safety switch to OFF and the selector switch to 0. If a backwash pump not supplied by Hydrotech is used, make sure that the rinse water supply is shut off. 2. Remove the lids on the side where the backwash pipe is located.
Figure 7.1.2. In the worn out nozzle, a change in the nozzle opening can be seen. Figure 7.1.2 a Figure 7.1.2 b New nozzle Worn out nozzle Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
(see Figure 7.2.1 and Figure 2.1). Figure 7.2.1 The bearings should be lubricated with the grease recom- Lubrication label mended in the maintenance schedule (see section 7.9). Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
(based on hydrochloric acid) designed for cleaning of filter cloths. If the clogging is caused by fat or oil, diluted sodium hydroxide (NaOH) can be used. WARNING! HCl and NaOH is highly cauterant. See local regulations for protection. Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
This will prevent unintentional rotation of the filter drum and also reduce the load on the drive chain and the gearbox. Figure 7.3.1b The right way to change filter panels Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
7.7.Backwash.strainer A backwash strainer can be used to remove particles in the rinse water. Cleaning instructions of the backwash strainer is found Figure 7.6 in Appendix G. Inlet rubber sealing Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
Every year or other interval (see 7.1.2). based on experience for the actual application. Change the gearbox oil. See appendix F. Oil type: ISO viscosity VG 680 (e.g. Omala oil 680 (Shell) or equivalent). Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
(when there is power to the relay). D. The level relay is defective. The red D. Replace the defective level diode lamp does not go out when the relay. water level drops below the sensor. Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
Page 26
Operation and maintenance manual for Hydrotech Discfilter HSF31-series...
Need help?
Do you have a question about the HSF31 Series and is the answer not in the manual?
Questions and answers