AMIAD Automatic Filters

Transcription

1 1. Model EBS AMIAD Automatic Filters Maintenance Guidelines General inspection In order to check the proper operation of the filter, close the low-pressure 1/4" valve to the pressure differential switch for a period of 5 seconds. This will initiate the selfcleaning cycle: Check that the exhaust valve opens, that the scanner moves upwards, and when it reaches the top limit switch - verify that the exhaust valve closes. Weekly maintenance 1. Check that the filter operates properly, following a general inspection. 2. Clean the 3/4" filter (close the 3/4" valve and operate a flushing cycle in order to release pressure and then open the bowl). 3. Check that there is grease on the drive shaft, and drive bushing. Add grease if necessary. 4. Take care of any leakage from the scanner shaft. If necessary, replace the Sealing flange Internal O-Ring (24.1) Changing the sealing flange internal O-ring 1. Close the inlet valve to the filter and release the pressure. 2. Verify that if the Suction Scanner is in the lower position. 3. Remove the Split pin (20.2) and pull out the connecting pin (20.1). 4. Operate a flushing cycle. 5. Stop the motor operation when the drive shaft reaches half way of its movement. The drive shaft is now separated from the Suction Scanner. 6. Unscrew nuts (27) and pull the sealing flange (26). 7. Remove the used internal o-ring and clean the o-ring seat. 8. Insert a new o-ring (24.1) 9. Apply some grease on the external o-ring and on the shaft. 10. Tighten the sealing flange nuts (27). 11. Re-connect the drive shaft to the suction scanner shaft. 12. Operate the control board and open the filter inlet valve. Maintenance prior to long term cessation of filter operation The following must be done if the filter will not operate for more than a month. 1. Operate flushing cycle (If possible, with a closed downstream valve). 2. Disconnect the control board from the power before the limit switch disc reaches the switch. 3. Release pressure from the filter. 4. Grease the drive shaft and the drive bushing. 5. Clean the 3/4" control filter.

2 WINTERIZING In regions where temperature during winter ( but not at irrigation season) drops below 40C, and freezing hazard exist, please act according to Winterizing instructions in chapter Winterizing guidelines attached. Maintenance prior to re-operation 1. Connect the control board to the mains. 2. Check proper operation of the filter. 3. Grease the drive shaft and the drive bushing. 4. If necessary change the Sealing flange Internal O-Ring. IMPORTANT!! THE DRIVE SHAFT MUST BE LUBRICATED WITH HEAVY-DUTY, WATER RESISTANT GREASE THAT WILL NOT OXIDIZE. (SHELL, DARINA EP-2 OR SIMILAR).

3 DISMANTLING AND ASSEMBLING THE FILTER COMPONENTS Opening the filter and disassembling its inner components is necessary for changing screens, periodic maintenance and repairs. Prior to opening the filter it is recommended to operate a flushing cycle by pressing the "TEST" push button. Dismantling: 1. Disconnect electrical power. 2. Close the water and drain the filter housing. 3. Pull the electrical plug from the solenoid valve (13). Disconnect the raccord connector (17.1). 4. Unscrew the bolts (14.1) and remove exhaust valve (14). 5. Unscrew bolts (33) and remove drive unit (34). Put the drive unit on a dry and protected surface near the filter. If the electric cable is not long enough, disconnect it from the motor. 6. Pull out the split pin (20.2) from the connecting pin (20.1) then pull out the connecting pin as well. If the connecting pin is not facing one of the shaft housing windows, turn the drive shaft (20) a little. Use 17mm or 11/16 spanners. 7. Turn the drive shaft (20) counter clockwise so that it will be separated from the suction scanner shaft (7.4). 8. Unscrew bolts (29.2) and remove the limit switches sling without disconnecting and changing the limit switches position. 9. Unscrew bolts (23) connecting shaft housing (22) to filter lid (10). 10. Pull up the shaft housing. Put it near the filter, make sure not to damage the limit switches electric wires. If necessary, disconnect the wires from the connecting box (4). (Do not forget to mark all wires for proper reconnections). 11. Remove O-ring seal (21). 12. Unscrew the housing bolts (11) and pull the lid using a crane or other lifting device, which is assembled exactly above the lid center. Note: the lid must be removed in a horizontal position in order to prevent damage to the suction scanner and the upper bearing seals. 13. Remove and keep the two centering sleeves (9). 14. Remove the housing O-Ring (2). 15. Pull the scanner (7) and the screen (5) (including screen seals 5.1). Reassembling the "EBS" filter: Before reassembling, visually check that all components are complete and in good mechanical condition. 1. Install the seals (5.1) on the screen (5) and insert the screen into the filter housing (1). 2. Position the scanner (7) in the filter housing. Make sure the lower shaft goes through the bearing (3). 3. Locate the housing O-ring (2) properly in its groove. 4. Apply some grease on the suction scanner shaft (7.4) and on the O-rings (8.2 and 24.1). 5. Lower the filter lid (10) carefully toward the filter housing (1) in a horizontal position. Make sure the lid is centered with the suction scanner. 6. For centering the lid properly use the two centering sleeves (9) together with two bolts (11) in opposite positions. 7. Screw the rest of the housing bolts. (11) Tightening opposite positioned bolts will achieve proper sealing. 8. Locate the O-ring (21) in its groove under the shaft housing (22). Place the bolts (23) but do not yet tighten them firmly. 9. Turn the drive shaft (20) clockwise until it reaches the suction scanner shaft. Insert the connecting pin (20.1) to the hole in the drive shaft through the suction scanner shaft hole.

4 10. Insert the split pin (20.2) in its original position. 11. Make sure that the drive shaft key (20.3) is in its place. Apply grease on it and reassemble the drive unit (34). 12. Tighten firmly the shaft housing bolts (23) and the drive unit bolts (33) in a controlled and balanced method. 13. Reassemble the limit switches sling (29.3), make sure the limit switches (29 and 29.1) are tight in their place. 14. Reassemble the exhaust valve (14), solenoid plug and pilot tube. (Raccord connector 17.4). 15. Make sure that all bolts are tightened. 16. Switch on the power. The motor will run until limit plate (28) reaches the lower limit switch (29). 17. Press the "test" push button and make sure the filter works according to stages of cleaning cycle (page 6). 18. Slowly turn on the water, watch and eliminate any leaking.

5 PARTS SCHEDULE NO. DESCRIPTION 1 Housing (EBS, ABF-10000) 1.1 Ball valve 3/4" (Brass) 2 O-Ring P Lower bearing (ABF-10000, EBS) 4 Electrical junction box 4.1 Bolt M5 x 16 (St.St.) 4.2 Nut M5 (St.St.) 4.3 Washer M5 (St.St.) [x4] 5 Weavewire screen (EBS) 5.1 Hydraulic seal AM-04 7 Suction scanner (EBS) 7.2 Slotted spring pin 10 x Suction scanner nozzle (EBS) [x6] 7.4 Suction scanner shaft (EBS) 8 Upper bearing (EBS) 8.1 O-Ring P2-041 [external] 8.2 O-Ring 71 x 5 [internal] 9 Centering sleeve (ABF-10000, EBS) 10 Lid (EBS) 11 Bolt M20 x 100 [x16] 11.1 Washer 3/4" [x16] 11.2 Washer 3/4" [x16] 11.3 Nut M20 [x16] 12 Flange seal 3" 13 Solenoid valve 24V AC, "NO" (Gem- Sol) Solenoid valve 24V AC, "NO" (ASCO) 13.1 L-Connector 5/16" x 1/4" 13.2 Air-brake tube 8 mm (5/16") 13.3 Connector 5/16" x 1/4" 13.4 L-Connector 5/16" x 1/8" [with Gem- Sol] Connector 5/16" x 1/4" [with Asco] 13.5 Air-brake tube 8 mm (5/16") 13.6 Connector 1/4" x 1/4" (Brass) 14 Hydraulic valve 3" (GAL) Hydraulic valve 3" (RAF) Hydraulic valve 3" (RAM) 14.1 Bolt M16 x 65 [x4] 14.2 Washer 5/8" (Galvanized) [x4] 14.3 Washer 5/8" (Galvanized) [x4] 14.4 Nut M16 [x4] 15 L-Connector 3/4"F-M (Galvanized) 16 Ball valve 3/4" (Brass) 17 3/4" Filter (AC), w/o valve, 200 micron 17.1 Raccord nut 3/4" 17.2 O-Ring P Raccord nipple 1/4" 17.4 L-Connector 5/16" x 1/4" 18 Pressure differential switch (Midwest) 18.1 Connector 5/16" x 1/8" 18.2 Connector 5/16" x 1/8" 18.3 Air-brake tube 8 mm (5/16") 18.4 L-Connector 5/16" x 1/4" 18.5 Set screw M6 x 25 (St.St.) [x2] 18.6 Nut M6 (St.St.) [x2] 18.7 Spring washer M6 (St.St.) [x2] 18.8 Washer M6 (St.St.) [x2] 18.9 Air-brake tube 8 mm (5/16") L-Connector 5/16" x 1/4" T-Connector 1/4" (Brass) Manometer valve 1/4" 19 Three-way valve 1/4" NO. DESCRIPTION 19.1 L-Connector 5/16" x 1/4" 19.2 L-Connector 5/16" x 1/4" 19.3 Air-brake tube 8 mm (5/16") 19.4 Connector 5/16" x 1/4" 19.5 T-Connector 1/4" (Brass) 19.6 Pressure gauge 1/4" (DI) 20 Drive shaft (EBS) 20.1 Connecting pin (EBS) 20.2 Split pin 2 x Drive shaft key (EBS) 21 O-Ring P Drive shaft housing (EBS) 22.1 Drive shaft housing cover (EBS) 23 Bolt M16 x 60 [x8] 23.1 Washer 5/8" (Galvanized) [x8] 23.2 Washer 5/8" (Galvanized) [x8] 23.3 Nut M16 [x8] 24 O-Ring 38 x 4 [external] 24.1 O-Ring 30 x 4 [internal] 25 Set screw M10 x 50 (St.St.) [x2] 26 Sealing flange (EBS) 27 Nut M10 (St.St.) [x2] 27.1 Washer M10 (St.St.) [x2] 28 Limit switch plate (EBS) 28.1 Set screw M4 x 16 (St.St.) [x2] 29 Limit switch "NC" [lower] 29.1 Limit switch "NC" [upper] 29.2 Bolt M6 x 20 (St.St.) [x2] 29.3 Limit switch sling (EBS) 29.4 Nut M6 (St.St.) [x2] 29.5 Spring washer M6 (St.St.) [x2] 29.6 Washer M6 (St.St.) [x2] 29.7 Washer M6 (St.St.) [x2] 29.8 Bolt M4 x 25 (St.St.) [x4] 29.9 Washer M4 (St.St.) [x4] Lock nut M4 (St.St.) [x4] 31 Drive bushing (EBS) 32 Bolt M6 x 35 (St.St.) 32.1 Lock nut M6 (St.St.) [x3] 32.2 Washer M6 (St.St.) 32.3 Washer M6 (St.St.) [x3] 33 Bolt M10 x 40 [x4] 33.1 Washer M10 (St.St.) [x4] 33.2 Washer M10 (St.St.) [x4] 33.3 Nut M10 [x4] 33.4 Spring washer M10 [x4] 34 Drive unit (EBS) 34.1 Electric motor V 50/60 Hz 1/2 HP 34.2 Worm gear RMI 70, 70:1(71) 35 Drive shaft cover (EBS) 35.1 Nut M6 (St.St.) [x2] 35.2 Set screw M6 x 45 [x2] 35.3 Nut M6 (St.St.) [x2] 36 Drive shaft housing assembly

6 PARTS DRAWING Section 1

7 PARTS DRAWING Section 2

8 PARTS DRAWING Section 3

9 2. Model"SAF-3000" Maintenance Guidelines General inspection Initiate a flush cycle by closing the 1/4" valve at the low pressure sensing port of the pressure differential switch for 5 seconds. Check that the exhaust valve opens, that the scanner moves properly, and when it reaches the limit switch - verify that the exhaust valve closes. Weekly maintenance: 1. Perform a general inspection as described above. 2. Clean the 3/4" filter connected to the exhaust solenoid. (Close the 3/4" valve and activate a flush cycle in order to release pressure and then unscrew the filter bawl). 3. Check that there is grease on the drive shaft, and drive bushing. Add grease if necessary. 4. Check for any leakage from the scanner shaft. If necessary, replace the sealing nut internal O-ring (7.7) Changing the sealing nut internal O-ring: 1. Close the inlet valve to the filter and release the pressure. 2. Remove the cover (23) from the drive shaft housing (7) by unscrewing the wing nuts (23.6). 3. If the Suction Scanner is in the outer position, operate a flush cycle and bring it to the inner position. 4. Remove the split pin (10.2) and pull out the connecting pin (10.1). 5. Operate a flush cycle. 6. Power down the unit when the drive shaft is half way through its cycle. The drive shaft is now separated from the suction scanner. 7. Unscrew the sealing nut (7.5). 8. Remove the used internal O-ring and clean the O-ring seat. 9. Insert a new O-ring (7.7) 10. Apply some grease on the external O-ring and on the shaft. 11. Tighten the sealing nut (7.5). 12. Re-connect the drive shaft to the suction scanner shaft. 13. Operate the control board and open the filter inlet valve. Maintenance prior to long term shutdown (end of season): The following must be done if the filter will not be in operation for longer than a month. 1. Perform a flush cycle (If possible, with a closed downstream valve). 2. Release pressure from the filter. 3. Power down the unit when the drive shaft is half way and none of the limit switches is pressed. 4. Disconnect the power supply to the control board. 5. Grease the drive shaft and the drive bushing. 6. Clean the 3/4" control filter. 7. Clean the coarse screen. WINTERIZING In regions where temperature during winter ( but not at irrigation season) drops below 40C, and freezing hazard exist, please act according to Winterizing instructions in chapter Winterizing guidelines attached.

10 Maintenance prior to renewing filter operation: 1. Connect the control board to the power supply. 2. Check proper operation of the filter, especially noting proper rotation. 3. Grease the drive shaft and the drive bushing. 4. If necessary, change the sealing nut internal O-ring. IMPORTANT!! THE DRIVE SHAFT MUST BE LUBRICATED WITH HEAVY-DUTY, WATER RESISTANT GREASE THAT WILL NOT OXIDIZE. (SHELL, DARINA EP-2 OR SIMILAR). Cleaning the coarse screen: 1. Close the filter inlet valve. 2. Release pressure from the filter by performing a flush cycle. 3. Remove the filter lid (1), pull out the flushing chamber (2) with its seal (2.1). 4. Pull out the coarse screen (3) and clean it. 5. Insert the coarse screen (3) in its position, so that it rests on its supports. 6. Insert the flushing chamber (2), Make sure the seal is on top of the chamber centering ring with its opening facing the inside of the filter housing. The insertion should be done at a slight angle and in a circular motion. 7. Close and tighten the filter lid.

11 DISMANTLING AND ASSEMBLING THE FILTER COMPONENTS Prior to opening the filter perform a flush cycle by pressing the "TEST" push button. The screens: Dismantling: 1. Close the filter inlet and outlet valves and release the pressure by performing a flush cycle. Power down the control board. 2. Unscrew the lid bolts (1.5) and remove the lid (1). 3. Pull out the flush chamber (2) with its seal (2.1). 4. Pull out the coarse screen (3) and clean it if necessary. 5. Pull out the upper cylinder seal (4.2). 6. Pull the fine screen (4) from the filter housing. 7. If required, remove the lower screen seal (4.3). Assembly: 1. Mount the lower screen seal (4.3) on the fine screen. 2. Insert the screen into the filter housing (6) with the support legs pointing upwards. After pushing the screen all the way in, rotate the screen so that it sits on the support legs. Jiggle the screen until the locking pin (on the inner side of the housing wall) seats in the slot on the centering ring (4.1). 3. Insert the cylinder seal (4.2), so that its open side faces outward. 4. Clean and apply some grease on the suction scanner pipe and on the O-ring (2.3) of the suction scanner bearing (2.2), located in the flush chamber. 5. Insert the coarse screen (3) in its position, so that it rests on its supports. 6. Insert the flush chamber (2), make sure the seal is on top of the chamber s centering ring with its open side facing inward. The installation should be done at a slight angle and in circular motion. 7. Assemble the lid on the filter housing. Tighten the bolts (1.5) evenly. 8. Open the filter inlet valve; first and then open the outlet valve. Turn on the control board. 9. Check proper operation of the filter. The suction scanner: Dismantling: 1. Close the filter s inlet valve, release the pressure and disconnect power supply from the control board. 2. Remove the cover (23) from the drive shaft housing (7) by unscrewing the wing nuts (23.6). 3. Remove the Split pin (10.2) and pull out the connecting pin (10.1). 4. Begin the dismantling procedure as per 1-6 in the chapter "dismantling the screens". 5. Pull the suction scanner (5) with a spiral motion from the filter housing.

12 Assembly: 1. Apply some grease on the smooth side of the suction scanner shaft (5.2) and insert it through the filter housing. 2. Insert the end of the suction scanner shaft (5.2) into the drive shaft (10) and align the holes 3. Insert the connecting pin (10.1) through the holes of the two shafts and lock it with the split pin (10.2). 4. Continue to assemble the parts as per 1-9 in the chapter "Assembling the screens".

13 The drive shaft housing: Dismantling: 1. Close the filter s inlet valve, release the pressure and disconnect power supply from the control board. 2. Dismantle the suction scanner and screens as described above. 3. Remove the limit switch sling (8) from the drive shaft housing by unscrewing the bolts (8.1). Carefully put the limit switch sling near the filter to avoid damaging the electrical wires. 4. Remove the drive unit (12) from the drive shaft housing (7) by unscrewing the nuts (12.7) from the bolts (12.3). Slide the drive unit off the shaft and make sure not to lose the drive shaft key (11). 5. Dismantle the drive shaft housing (7) from the housing flange (6) by unscrewing the bolts (7.1). Assembly: 1. Verify that the O-ring (6.1) is clean and properly placed. 2. Tighten the bolts (7.1) to secure the flange of the drive shaft housing to the filter. 3. Insert the suction scanner (5), the fine screen (4) and the coarse screen as described previously. 4. Connect the drive shaft (10) to the scanner shaft using the connecting pin (10.1) and split pin (10.2). 5. Make sure the drive shaft key (11) is fitted properly in the gearbox. Slide the drive unit over the drive shaft and make sure that the drive shaft groove is aligned with the drive shaft key. 6. Connect the drive unit (12) to the drive shaft housing (7) with the bolts (12.3), and tighten them. 7. Assemble the limit switch sling (8) in its place. Make sure that the Limit Switch Plate is halfway between the two limit switches. 8. Power up the control board and make sure the filter is operating properly. Check Rotation! 9. Open the filter inlet valve; first and then open the outlet valve and recheck filter operation.

14 PARTS SCHEDULE NO. DESCRIPTION 1 Lid (SAF-1500, 3000) 1.1 Hydraulic seal AM-07 (Polyester lid) 1.2 Plug 2" 1.3 Washer 3/4" [x4] 1.4 Nut M20 [x4] 1.5 Bolt M20 x 130 [x4] 2 Flushing chamber (SAF-3000) 2.1 Flushing chamber seal AM Suction scanner bearing - (SAF- 3000) 2.3 O-Ring 60 x 4 3 Coarse screen (SAF-1500, 3000) 4 Weavewire screen (SAF-3000) 4.1 Screen centering ring (SAF-3000) 4.2 Hydraulic seal AM Hydraulic seal AM-05 5 Suction scanner (SAF-3000) 5.1 Suction scanner nozzle (SAF-3000) [x3] 5.2 Suction scanner shaft (SAF-3000) 5.3 Slotted pin 5 x 50 (St.St.) 5.4 Slotted pin 3 x 30 (St.St.) 6 Housing (HydroS-3000, SAF-3000) 6.1 O-Ring P Plug 3/4" 6.3 Bolt M6 x 20 (St.St.) [x2] 6.4 Washer M6 (St.St.) [x2] 6.5 Nut M6 (St.St.) [x2] 6.6 Instrumentation bracket (SAF) 7 Drive shaft housing (SAF-1500, 3000) 7.1 Bolt M16 x 60 [x4] 7.2 Washer 5/8" (Galvanized) [x4] 7.3 Washer 5/8" (Galvanized) [x4] 7.4 Nut M16 [x4] NO. DESCRIPTION 7.5 Tightening nut (SAF-1500, 3000, 4500) 7.6 O-Ring 24 x O-Ring 14 x Drive bushing (SAF) 7.9 Bolt M6 x 35 (St.St.) [x3] 7.10 Washer M6 (St.St.) [x3] 7.11 Washer M6 (St.St.) [x3] 7.12 Lock nut M6 (St.St.) [x3] 8 Limit switch sling (SAF) 8.1 Bolt M6 x 20 (St.St.) [x2] 8.2 Washer M6 (St.St.) [x2] 8.3 Washer M6 (St.St.) [x2] 8.4 Lock nut M6 (St.St.) [x2] 9 Limit switch "NC" (EBS, SAF) [x2] 9.1 Bolt M4 x 20 (St.St.) [x4] 9.2 Washer M4 (St.St.) [x4] 9.3 Lock nut M4 (St.St.) [x4] 10 Drive shaft (SAF-1500, 3000, 4500) 10.1 Connecting pin (SAF-1500, 3000, 4500) 10.2 Split pin 1.6 x Limit switch plate (SAF) 10.4 Limit switch plate locking ring 11 Drive shaft key (SAF) 12 Drive unit (SAF-1500, 3000, 4500) 12.1 Electric motor V 50/60 Hz 1/4 HP 12.2 Worm gear RMI 50, 28:1 (63) 12.3 Bolt M8 x 40 [x4] 12.4 Washer M8 [x4] 12.5 Washer M8 [x4] 12.6 Spring washer 5/16" [x4] 12.7 Nut M8 [x4] 13 Drive shaft cover (SAF)

15 NO. DESCRIPTION 13.1 Set screw M8 x 20 (St.St.) [x4] 14 Hydraulic valve 2" (GAL) Hydraulic valve 2" (RAM) Hydraulic valve 2" (RAF) 14.1 Connector 1/4" x 1/4" (Brass) 15 Solenoid valve 24V AC, "NO" (Gem- Sol) Solenoid valve 24V AC, "NO" (ASCO) 15.1 L-Connector 5/16" x 1/4" 15.2 Air-brake tube 8 mm (5/16") 15.3 Connector 5/16" x 1/4" 15.4 L-Connector 5/16" x 1/8" [with Gem- Sol] Connector 5/16" x 1/4" [with Asco] NO. DESCRIPTION 19 Pressure differential switch (Midwest) 19.1 Connector 5/16" x 1/8" 19.2 L-Connector 5/16" x 1/8" 19.3 Air-brake tube 8 mm (5/16") 19.4 L-Connector 5/16" x 1/4" 19.5 Set screw M6 x 25 (St.St.) [x2] 19.6 Nut M6 (St.St.) [x2] 19.7 Spring washer M6 (St.St.) [x2] 19.8 Washer M6 (St.St.) [x2] 20 Manometer valve 1/4" 20.1 Connector 5/16" x 1/4" 20.2 Air-brake tube 8 mm (5/16") 21 Electrical junction box (SAF) 16 3/4" Filter (AC), w/o valve, 200 micron 22 Pressure check point - complete (steel) 16.1 Raccord nut 3/4" 16.2 Raccord nipple 1/4" 16.3 L-Connector 5/16" x 1/4" 16.4 Air-brake tube 8 mm (5/16") 16.5 O-Ring P L-Connector 3/4"F-M (Galvanized) 18 Ball valve 3/4" (Brass) 23 DS housing cover (SAF-1500, 3000,4500) 23.1 Bolt M6 x 60 (St.St.) [x2] 23.2 Washer M6 (St.St.) [x2] 23.3 Washer M6 (St.St.) [x2] 23.4 Nut M6 (St.St.) [x2] 23.5 Washer M6 (St.St.) [x2] 23.6 Wing nut M6 (St.St.) [x2]

16 PARTS DRAWING Section 1

17 PARTS DRAWING Section 2

18 PARTS DRAWING Section 3

19 Delta-Pro Pressure and Differential Pressure Switches GENERAL The 24 Series pressure switch utilizes a diaphragm sensor to monitor pressure changes. Pressures which exceed the calibrated set point cause an actuator to operate a snap action switch. The differential pressure version utilizes dual diaphragm sensors to monitor the difference in pressure between two sources. Installation Never tighten by turning the control into the fitting. WIRING All live supply circuits must be disconnected before wiring the control. For enclosed units, connect the conduit to the hole in accordance with national and local codes. Bring wires up to the terminals from the rear. Maximum recommended wire size is 16 awg. MOUNTING Locate switch where vibration, shock, and ambient temperature fluctuations are minimal. To avoid damage to control, always hold the wrench on the wrench flats or hex portion of the pressure connection when tightening. The control can be mounted in any position. Locate where ambient temperature is above 30 f and below 160 f. RECOMMENDED PRACTICES AND WARNINGS United Electric Controls Company recommends careful consideration of the following factors when specifying and installing UE pressure and temperature units. Before installing a unit, the Installation and Maintenance instructions provided with unit must be read and understood. To avoid damaging unit, proof pressure and max temperature limits stated in literature and on nameplates must never be exceeded, even by surges in the system. Operation of the unit up to proof pressure or max temperature is acceptable on a limited basis (i.e.start-up, testing) but continuous operation must be restricted to the designated adjustable range. Excessive cycling at proof pressure or maximum temperature limits could reduce sensor life. A back-up unit is necessary for applications where damage to a primary unit could endanger life, limb or property. A high or low limit switch is necessary for applications where dangerous runaway condition could result. The adjustable range must be selected so that incorrect, inadvertent or malicious setting at any range point can not result in an unsafe system condition. Install unit where shock, vibration and ambient temperature fluctuations will not damage unit or affect operation. Orient unit so that moisture does not enter the enclosure via the electrical connection. Unit must not be altered or modified after shipment. Consult UE if modification is necessary. Monitor operation to observe warning signs of possible damage to unit, such as drift in set point. Check unit immediately. Preventative maintenance and periodic testing is necessary for critical applications where damage could endanger property or personnel. For all applications, a factory set unit should be tested before use. Electrical ratings stated in literature and on nameplate must not be exceeded. Overload on a switch can cause damage, even on the first cycle. Wire unit according to local and national electrical codes, using wire size recommended in installation sheet. Use only factory authorized replacement parts and procedures. Do not mount unit in ambient temp. exceeding published limits. For remote mounted temperature units, capillary lengths beyond 10 feet can increase chance of error, and may require re-calibration of set point and indication.

20 ELECTROMECHANICAL PRESSURE & VACUUM SWITCHES (DP) Troubleshooting Problem Reason Check Solution Switch does not actuate 1)Electrical Problems 1a)Wrong wiring Wiring Re-wire according to instructions 1b)Too much current, burned out switch 1c)Dry circuit, too little current 1d)A wire is grounded 1e)Control head subjected to high temperature 2)Mechanical Problems 2a)Set point had been changed Current level Contacts in DP Wiring Switch type and condition Set point Substitute higher contact switch Substitute gold contact switch to minimize oxidation Re-wire properly Use hi-ambient switch Re-set to required point 2b)Plunger binds Plunger Replace the plunger Malfunctionin g of the pressure sensor 3a)Plunger is not moving 3b)Control head is over-pressured If depressed regardless of pressure exerted Sensor movement 3c)Sensor corroded Corrosive media Replace sensor Replace sensor with a high pressure type and / or protect from overpressure Use sensor that resists corrosive media or use chemical seal 3d)Pivots binding Over pressures Confirm system over pressures Sensor is not operating or water is leaking Switch is chattering 4)Over pressure beyond control specifications 5)Water is corrosive 6)Vibration 7)There are pulses in pressure line Check system pressure Check water quality Origin of vibrations Origin of pulses Replace sensor with a high pressure sensor Replace sensor with a suitable one for the type of water used *Mount away from vibration *Order 12 Series unit (anti vibration) Use pulsation dampener in line (such as a hydrofor tank)

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