FLK Gas Sampling System - MPIP - Free

More documents

Recommendations

Info

Siemens SQ252 Electrically Heated Dedusting Filter 4.3 Cleaning the filter or replacing the filter tube The filter should be removed and cleaned If an excessively large negative pressure occurs at the filter, or, when a valve combination is used, the filter flushing is often initiated by the low pressure, or at the latest after the signal "Filter / probe blocked" occurs. Careful - danger of burning ! Electrically heated filter has an operating temperature of up to 210° Cel. See Figure 3 for the procedure • Switch off the fuse for the filter heater or unplug the plug for the filter on the valve combination. • Start the compressed air flushing, if available, a few times to cool the filter. • Loosen and remove the hoses on the filter head at the filter end (compressed air connection, Item 82 and measuring gas connection, Item 83). • Loosen the tommy screw (Item 14) on the retaining clip (Item 15). • Swivel the retaining clip to the side. • Withdraw the filter head (Item 1) with the filter tube (Item 4) downwards. • Loosen the screw (Item 7), retaining it with a mandrel. • Remove the cup springs (Item 5) and retaining washer (Item 6). • Remove the filter tube (Item 4) and clean it inside and outside with a brush and compressed air. With obstinate soiling, the filter tube can be cleaned with a suitable chemical solvent. However, if the filter tube is mechanically damaged or cleaning is no longer possible, then it must be replaced. • Before fitting the cleaned or new filter tube, check the O-rings (Item 3) for sealing on the front side of the filter tube and the sealing gasket (Item 2) on the filter head, renewing them if required. • Replace the filter tube, place the retaining washer (Item 6) and the cup springs (Item 5) flat, tighten with screw (Item 7) and retain using the mandrel. Make sure that the filter tube does not become misaligned. • Replace the filter insert and fasten with the retaining clip and tommy screw. • Blow out the gas lines from the filter to the probe sampling chamber as well as the condensate vessel with compressed air or clean them by hand. • Reconnect the hoses, ensuring sealing tightness. • Carry out a leakage test according to Section 4.2.1. • Plug in the electrical connectors and switch on the heater fuse. Copyright ® SIEMENS Page 54 04/04
Siemens SQ252 Electrically Heated Dedusting Filter 4.4 Replacing the thermostat • Switch off the fuse for the filter heater or withdraw the plug for the filter on the valve combination. • Start the compressed air flushing a few times, if available, to cool the filter. • Loosen the electrical connection cable in the terminal box (Item 12) and pull back the cable. • Remove the thermostat after loosening the screws at the top of the filter. • Smear the new thermostat with heat conducting paste on the bottom and firmly screw to the filter. • Insert the cable into the terminal box and connect according to the wiring diagram. • Carry out a functional test. 4.5 Measures for fault rectification 4.5.1 Filter does not reach operating temperature after about 15min. • Check the voltages in the terminal box. • If there is no voltage on the heater, replace the thermostat. • If voltage is present on the heater, replace the heater or the complete filter housing. 4.5.2 No release of the measuring gas pump • Check that the filter operating temperature is about 200 ºCel. • Check the voltages in terminal box. • If the temperature is still too low after about 15 min., carry out procedure in 4.4.1. • If the operating temperature is reached, but thermostat not closed for release, replace the thermostat. 4.5.3 Filter becomes blocked too quickly If the filter becomes blocked soon after cleaning: • Check whether the release for the measuring gas pump only occurs after reaching the operating temperature. • Replace auxiliary-contact thermostat. Procedure as in 4.3. • Is there enough compressed air available for flushing? • Check the compressed air pressure and check supply line if necessary. • Is there compressed air available as required (free of oil and dry) ? • Check the filter tube for blocked pores (black, burnt deposits). Note: If oil compounds are present in the compressed air, then baked-on deposits which are difficult to remove occur in the filter tube. The tube can then only be replaced. Copyright ® SIEMENS Page 55 04/04
Page 1:
FLK Gas Sampling System Operating M
Page 4 and 5: SQ250 FLK Gas Sampling System 1. In
Page 6 and 7: SQ250 FLK Gas Sampling System 1.5 M
Page 8 and 9: SQ250 FLK Gas Sampling System Fig.
Page 10 and 11: SQ250 FLK Gas Sampling System 2. In
Page 12 and 13: SQ250 FLK Gas Sampling System If a
Page 14 and 15: SQ250 FLK Gas Sampling System 2.7 C
Page 16 and 17: SQ250 FLK Gas Sampling System 2.10
Page 18 and 19: SQ250 FLK Gas Sampling System • S
Page 20 and 21: SQ250 FLK Gas Sampling System If fa
Page 22 and 23: SQ250 FLK Gas Sampling System 4. Ma
Page 24 and 25: SQ250 FLK Gas Sampling System The p
Page 26 and 27: • When the pump has switched off,
Page 28 and 29: SQ250 FLK Gas Sampling System 4.5 M
Page 30 and 31: Copyright ® SIEMENS Page 30 04/04
Page 32 and 33: SQ251 FLK Gas Sampling Probe Note:
Page 34 and 35: SQ251 FLK Gas Sampling Probe 1.4 Co
Page 36 and 37: SQ251 FLK Gas Sampling Probe 2 Inst
Page 38 and 39: SQ251 FLK Gas Sampling Probe 2.3 Co
Page 40 and 41: SQ251 FLK Gas Sampling Probe 3 Oper
Page 42 and 43: SQ252 Electrically Heated Dedusting
Page 52 and 53: Siemens SQ252 Electrically Heated D
Page 56 and 57: Siemens SQ253 Valve Combination Cop
Page 58 and 59: Siemens SQ253 Valve Combination Con
Page 60 and 61: Siemens SQ253 Valve Combination 1.3
Page 62 and 63: SQ253 Valve Combination 1.5 Mode of
Page 64 and 65: SQ253 Valve Combination 2. Installa
Page 66 and 67: SQ253 Valve Combination 3. Operatio
Page 68 and 69: SQ253 Valve Combination 4.3 Compres
Page 70 and 71: SQ253 Valve Combination 4.4 Condens
Page 72 and 73: SQ253 Valve Combination 4.6 Low-pre
Page 74 and 75: SQ253 Valve Combination 4.8.2 Clean
Page 76 and 77: SQ254 Heat Exchanger Note: We would
Page 78 and 79: SQ254 Heat Exchanger 1.4 Function d
Page 80 and 81: SQ254 Heat Exchanger 2. Installatio
Page 82 and 83: SQ254 Heat Exchanger 3.3 Adjustment
Page 84 and 85: Siemens Copyright ® SIEMENS Page 8
Page 86 and 87: Siemens SQ255 Control Unit Note: We
Page 88 and 89: Siemens SQ255 Control Unit 1.4 Cons
Page 90 and 91: SQ255 Control Unit 2. Installation
Page 92 and 93: Copyright ® SIEMENS Page 92 04/04
Page 94 and 95: SQ256 Retraction Device Note: We wo
Page 96 and 97: SQ256 Retraction Device 1.4 Constru
Page 98 and 99: SQ256 Retraction Device 2 Installat
Page 100 and 101: SQ256 Retraction Device The probe c
Page 102 and 103: SQ256 Retraction Device 4. Maintena
Page 104 and 105:
SQ256 Retraction Device 4.3 Chain w
Page 106 and 107:
SQ256 Retraction Device Manufacture
show all

FLK Gas Sampling System - MPIP - Free

Create successful ePaper yourself

Delete template?

Save as template?