AMIAD Automatic Filters 1. Model “EBS”

Transcription

AMIAD Automatic Filters
1. Model “EBS”
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.
2.
3.
4.
5.
Close the inlet valve to the filter and release the pressure.
Verify that if the Suction Scanner is in the lower position.
Remove the Split pin (20.2) and pull out the connecting pin (20.1).
Operate a flushing cycle.
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.
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.
2.
3.
4.
Connect the control board to the mains.
Check proper operation of the filter.
Grease the drive shaft and the drive bushing.
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).
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.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Disconnect electrical power.
Close the water and drain the filter housing.
Pull the electrical plug from the solenoid valve (13). Disconnect the raccord connector (17.1).
Unscrew the bolts (14.1) and remove exhaust valve (14).
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.
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.
Turn the drive shaft (20) counter clockwise so that it will be separated from the suction scanner
shaft (7.4).
Unscrew bolts (29.2) and remove the limit switches sling without disconnecting and changing
the limit switches position.
Unscrew bolts (23) connecting shaft housing (22) to filter lid (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).
Remove O-ring seal (21).
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.
Remove and keep the two centering sleeves (9).
Remove the housing O-Ring (2).
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.
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.
PARTS SCHEDULE
NO.
1
1.1
2
3
4
4.1
4.2
4.3
5
5.1
7
7.2
7.3
7.4
8
8.1
8.2
9
10
11
11.1
11.2
11.3
12
DESCRIPTION
Housing (EBS, ABF-10000)
Ball valve 3/4" (Brass)
O-Ring P2-471
Lower bearing (ABF-10000, EBS)
Electrical junction box
Bolt M5 x 16 (St.St.)
Nut M5 (St.St.)
Washer M5 (St.St.) [x4]
Weavewire screen (EBS)
Hydraulic seal AM-04
Suction scanner (EBS)
Slotted spring pin 10 x 60
Suction scanner nozzle (EBS) [x6]
Suction scanner shaft (EBS)
Upper bearing (EBS)
O-Ring P2-041 [external]
O-Ring 71 x 5 [internal]
Centering sleeve (ABF-10000, EBS)
Lid (EBS)
Bolt M20 x 100 [x16]
Washer 3/4" [x16]
Washer 3/4" [x16]
Nut M20 [x16]
Flange seal 3"
Solenoid valve 24V AC, "NO" (Gem13
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"
L-Connector 5/16" x 1/8" [with Gem13.4
Sol]
13.5
13.6
14
14.1
14.2
14.3
14.4
15
16
17
17.1
17.2
17.3
17.4
18
18.1
18.2
18.3
18.4
18.5
18.6
18.7
18.8
18.9
18.10
18.11
18.12
19
Connector 5/16" x 1/4" [with Asco]
Air-brake tube 8 mm (5/16")
Connector 1/4" x 1/4" (Brass)
Hydraulic valve 3" (GAL)
Hydraulic valve 3" (RAF)
Hydraulic valve 3" (RAM)
Bolt M16 x 65 [x4]
Washer 5/8" (Galvanized) [x4]
Nut M16 [x4]
L-Connector 3/4"F-M (Galvanized)
3/4" Filter (AC), w/o valve, 200
micron
Raccord nut 3/4"
O-Ring P2-112
Raccord nipple 1/4"
L-Connector 5/16" x 1/4"
Pressure differential switch (Midwest)
Connector 5/16" x 1/8"
Set screw M6 x 25 (St.St.) [x2]
Nut M6 (St.St.) [x2]
Spring washer M6 (St.St.) [x2]
T-Connector 1/4" (Brass)
Manometer valve 1/4"
Three-way valve 1/4"
NO.
19.1
19.2
19.3
19.4
19.5
19.6
20
20.1
20.2
20.3
21
22
22.1
23
23.1
23.2
23.3
24
24.1
25
26
27
27.1
28
28.1
29
29.1
29.2
29.3
29.4
29.5
29.6
29.7
29.8
29.9
29.10
31
32
32.1
32.2
32.3
33
33.1
33.2
33.3
33.4
34
34.1
34.2
35
35.1
35.2
35.3
36
DESCRIPTION
T-Connector 1/4" (Brass)
Pressure gauge 1/4" (DI)
Drive shaft (EBS)
Connecting pin (EBS)
Split pin 2 x 20
Drive shaft key (EBS)
O-Ring P2-433
Drive shaft housing (EBS)
Drive shaft housing cover (EBS)
Bolt M16 x 60 [x8]
Nut M16 [x8]
O-Ring 38 x 4 [external]
O-Ring 30 x 4 [internal]
Sealing flange (EBS)
Limit switch plate (EBS)
Limit switch "NC" [lower]
Limit switch "NC" [upper]
Bolt M6 x 20 (St.St.) [x2]
Limit switch sling (EBS)
Spring washer M6 (St.St.) [x2]
Lock nut M4 (St.St.) [x4]
Drive bushing (EBS)
Bolt M6 x 35 (St.St.)
Washer M6 (St.St.)
Bolt M10 x 40 [x4]
Nut M10 [x4]
Spring washer M10 [x4]
Drive unit (EBS)
Electric motor 380-480V 50/60 Hz 1/2 HP
Worm gear RMI 70, 70:1(71)
Drive shaft cover (EBS)
Set screw M6 x 45 [x2]
Drive shaft housing assembly
PARTS DRAWING Section 1
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.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Close the inlet valve to the filter and release the pressure.
Remove the cover (23) from the drive shaft housing (7) by unscrewing the wing nuts (23.6).
If the Suction Scanner is in the outer position, operate a flush cycle and bring it to the inner position.
Remove the split pin (10.2) and pull out the connecting pin (10.1).
Operate a flush cycle.
Power down the unit when the drive shaft is half way through its cycle. The drive shaft is now
separated from the suction scanner.
Unscrew the sealing nut (7.5).
Remove the used internal O-ring and clean the O-ring seat.
Insert a new O-ring (7.7)
Apply some grease on the external O-ring and on the shaft.
Tighten the sealing nut (7.5).
Re-connect the drive shaft to the suction scanner shaft.
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.
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.
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.
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.
2.
3.
4.
5.
6.
Close the filter inlet valve.
Release pressure from the filter by performing a flush cycle.
Remove the filter lid (1), pull out the flushing chamber (2) with its seal (2.1).
Pull out the coarse screen (3) and clean it.
Insert the coarse screen (3) in its position, so that it rests on its supports.
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.
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.
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".
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.
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-01
Suction scanner bearing - (SAF2.2
3000)
NO. DESCRIPTION
7.5
Tightening nut (SAF-1500, 3000,
4500)
7.6
O-Ring 24 x 3
7.7
O-Ring 14 x 3
7.8
Drive bushing (SAF)
7.9
7.10 Washer M6 (St.St.) [x3]
7.12 Lock nut M6 (St.St.) [x3]
8
Limit switch sling (SAF)
2.3
O-Ring 60 x 4
8.1
3
Coarse screen (SAF-1500, 3000)
8.2
4
Weavewire screen (SAF-3000)
8.3
4.1
Screen centering ring (SAF-3000)
8.4
4.2
9
Limit switch "NC" (EBS, SAF) [x2]
4.3
9.1
5
Suction scanner (SAF-3000)
9.2
Suction scanner nozzle (SAF-3000)
9.3
10
Drive shaft (SAF-1500, 3000, 4500)
5.1
[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.)
10.2 Split pin 1.6 x 12
6
Housing (HydroS-3000, SAF-3000)
10.3 Limit switch plate (SAF)
6.1
O-Ring P2-433
10.4 Limit switch plate locking ring
6.2
Plug 3/4"
11
Drive shaft key (SAF)
6.3
12
Drive unit (SAF-1500, 3000, 4500)
6.4
6.5
6.6
Instrumentation bracket (SAF)
7
Drive shaft housing (SAF-1500,
3000)
12.4 Washer M8 [x4]
7.1
Bolt M16 x 60 [x4]
12.5 Washer M8 [x4]
7.2
12.6 Spring washer 5/16" [x4]
7.3
12.7 Nut M8 [x4]
7.4
Nut M16 [x4]
13
10.1
12.1
Connecting pin (SAF-1500, 3000,
4500)
Electric motor 380-480V 50/60 Hz 1/4
HP
12.2 Worm gear RMI 50, 28:1 (63)
12.3 Bolt M8 x 40 [x4]
Drive shaft cover (SAF)
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-
Pressure differential switch
(Midwest)
19.1 Connector 5/16" x 1/8"
19.2 L-Connector 5/16" x 1/8"
19.4 L-Connector 5/16" x 1/4"
19.5 Set screw M6 x 25 (St.St.) [x2]
Solenoid valve 24V AC, "NO"
(ASCO)
19.6 Nut M6 (St.St.) [x2]
15.3 Connector 5/16" x 1/4"
16
19
Sol)
15.1 L-Connector 5/16" x 1/4"
15.4
NO. DESCRIPTION
L-Connector 5/16" x 1/8" [with Gem-
Sol]
19.7 Spring washer M6 (St.St.) [x2]
20
Manometer valve 1/4"
20.1 Connector 5/16" x 1/4"
Connector 5/16" x 1/4" [with Asco]
21
Electrical junction box (SAF)
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"
16.5 O-Ring P2-112
17
L-Connector 3/4"F-M (Galvanized)
18
23
DS housing cover (SAF-1500,
3000,4500)
23.1 Bolt M6 x 60 (St.St.) [x2]
23.4 Nut M6 (St.St.) [x2]
23.6 Wing nut M6 (St.St.) [x2]
PARTS DRAWING
Section 1
PARTS DRAWING
Section 2
PARTS DRAWING
Section 3
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.
ELECTROMECHANICAL PRESSURE & VACUUM SWITCHES (DP)
Troubleshooting
Problem
Switch does
not actuate
Malfunctionin
g of the
pressure
sensor
Reason
1)Electrical
Problems
1a)Wrong wiring
Check
Wiring
Solution
Re-wire according to instructions
1b)Too much
current,
burned out
switch
Current level
Substitute higher contact switch
1c)Dry circuit,
too little current
Contacts in DP
Substitute gold contact switch to
minimize oxidation
1d)A wire is
grounded
Wiring
Re-wire properly
1e)Control head
subjected to high
temperature
Switch type and
condition
Use hi-ambient switch
2)Mechanical
Problems
2a)Set point had
been changed
Set point
Re-set to required point
2b)Plunger binds
Plunger
Replace the plunger
3a)Plunger is not
moving
If depressed
regardless of
pressure exerted
Sensor
movement
Replace sensor
3b)Control head is
over-pressured
3d)Pivots binding
Over pressures
Replace sensor with a high pressure
type and / or protect from overpressure
Use sensor that resists corrosive
media or use chemical seal
Confirm system over pressures
4)Over pressure
beyond control
specifications
Check system
pressure
Replace sensor with a high pressure
sensor
5)Water is
corrosive
6)Vibration
Check water
quality
Origin of
vibrations
Origin of pulses
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)
3c)Sensor corroded Corrosive media
Sensor is not
operating or
water is
leaking
Switch is
chattering
7)There are pulses
in pressure line

AMIAD Automatic Filters 1. Model “EBS”

Transcription

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