Home

FHM2 Service Manual - Western Enterprises

Contents

1. KEY DESCRIPTION 1 Box and Cover 115 to 24 VAC Transformer PCB Assembly 18 Gauge Black Wire Cord Assembly Strain Relief Bushing Transformer Wire Sub Assy O A N 6 Wire Connector PART WME 7 6 8440 WME 8 85 WME 8 96A WMS 13 40 WMC 6 42 WMS 13 41 WME 8 94 5 10 B20353 ECN 13787 0701
2. Example FHM2 9 4 Total number of cylinders Overall manifold length 9 3 107 117 Figure 1 1 Installation Dimensions 1 1 B20353 ECN 13787 0701 MANIFOLD SPECIFICATIONS Flow Capability Oxygen 2200 SCFH at 50 psig delivery with a 15 psi pressure drop and 2000 psig inlet pressure 800 SCFH at 50 psig delivery with a 5 psi pressure drop and 2000 psig inlet pressure Nitrogen 4650 SCFH at 160 psig delivery with a 15 psi pressure drop and 2000 psig inlet pressure 400 SCFH at 160 psig delivery with a 5 psi pressure drop and 2000 psig inlet pressure Nitrous Oxide The flow capability of a Nitrous Oxide cylinder manifold will depend upon conditions at the installation site demands of the delivery system and the number of cylinders in supply service Capability is 500 SCFH at 50 psig delivery and 750 psig inlet pressure Installing a Nitrous Oxide manifold in a location which exposes it to ambient temperatures below 20 F 7 C is not recommended Breathing Air 2500 SCFH at 50 psig delivery with a 15 psi pressure drop and 2000 psig inlet pressure 650 SCFH at 50 psig with a 5 psi pressure drop and 2000 psig inlet pressure Helium 2500 SCFH at 50 psig delivery with a 15 psi pressure drop and 2000 psig inlet pressure 650 SCFH at 50 psig delivery with a 5 psi pressure drop and 2000 psig inlet pressure Carbon Dioxide The flow capability of a C
3. 4 4 Gauge Replacement uero e d e re Hi Ite pe Lx EH eee Rae D ia ee tus 4 4 Primary Regulator ebd ic repete 4 5 Pressure Switch Replacement 4 7 Check Valve Repair 4 8 Solenoid Valve 4 9 deae RS reote ene 4 12 e tt M a tc aba aute 4 14 Electrical PowerUp orta hun AR Ss a R uay Sh Gk ala has as aa 4 15 Transducer sse enne sensn 4 18 iii B20353 ECN 13787 0701 SECTION 5 MAINTENANCE AND REPAIR PARTS 5 1 Replacement Pigtalls on 3 O h 5 1 GAUGES wikis ee e Re e eH de 5 1 Regulators and Repair Kits uu eee nennen nennen nennen aa 5 1 Valves and Valve Repair 5 2 ta tereti Ca ERN 5 2 Power Supply Replacement Parts ninian ainats 5 2 tdt cheese D tein
4. Low Pressure Chamber Seat and Nozzle High Pressure Chamber INLET PORT e OUTLET PORT B N MNA FIGURE 2 8 Primary Regulator 2 6 B20353 ECN 13787 0701 Gas enters the regulator through the inlet port and fills the high pressure chamber and the port to the cylinder contents gauge with gas See Figure 2 8 Gas in these areas is at the same pressure as the gas in the cylinders The gas is sealed in this chamber by the seat holder and stem being pushed against the nozzle seal by gas pressure and the body spring An o ring seals between the nozzle and the regulator body The next area of the regulator is the low regulated pressure area of the regulator This chamber is sealed from the high pressure area by the seat nozzle assembly and the o ring around the nozzle and is isolated from the atmospheric pres sure by the diaphragm sub assembly forming a seal around the body of the regulator The diaphragm is squeezed be tween the body of the regulator a slip ring washer and the regulator bonnet as the bonnet is tightened down on the The third chamber of the regulator is open to atmospheric pressure This chamber contains the regulator bonnet adjust ing screw pivot bonnet spring washer and the top side of the diaphragm sub assembly As the adjusting screw is turned in against the
5. WESTERN AUTOMATIC CHANGEOVER MANIFOLD FHM2 FHM2HL 4 FHM2HP SERIES SERVICE MANUAL WESTERN INNOVATOR xs Eo 5 9 25 0 m FHM2 f WESTERN ENTERPRISES PRINTED IN USA B20353 ECN 13787 0701 SAFETY Statements in this manual preceded by the following safety signal words are of special significance Definitions on the SAFETY signal words follow DANGER Means a hazard that will cause death or serious injury if the warning is ignored WARNING Means a hazard that could cause death or serious injury if the warning is ignored CAUTION Means a hazard that may cause minor or moderate injury if the warning is ignored It also means a hazard that will only cause damage to property NOTE Indicates points of particular interest for more efficient and convenient operation INTRODUCTION This manual provides the information needed to service the Western Enterprises FHM2 FHM2HL and FHM2HP series manifolds This information is intended for use by technicians or personnel qualified to repair and service manifold equip ment The information contained in this document including performance specificat
6. Left Primary Regulator Right Primary Regulator Pressure Transducer T9 E Pressure Transducer cnn E ia FIGURE 2 5 Piping Schematic FHM2HL 2 4 B20353 ECN 13787 0701 POWER SUPPLY CONNECTIONS RELAY 5 1 24 VAC 1 26 24 VAC 2 12 VAC 1 ALARM RELAY ALARM CHASSIS 2 DIP SWITCHES PARR SOTVNV ANALOG GROUND RIGHT N C ARANE Eg RIGHT BANK PRESSURE RIGHT BANK PRESSURE ANALOG 5V LEFT ANALOG GROUND BLACK BANK PRESSURE LEFT WHITE BANK PRESSURE TRANSDUCER ANALOG SV RED ANALOG GROUND LINE PRESSURE LINE PRESSURE AS SOTVNV BLACK UTLET WHITE TRANSDUCER creen AS SOTVNV RED ANALOG 5V COMMON BLACK ANALOG GROUND N O BROWN N O N C RED PRESSURE RIGHT WHITE 24 VAC 1 SW ITCH SOLENOID RIGHT SOLENOID OWA v7 Z OWA Z BLACK 24 VAC 1 LEFT r 4 SOLENOID RED LEFT SOLENOID o o s o m FIGURE 2 6 Electrical Schematic less heater The gas from the open solenoid valve is routed through the check valve to the interme
7. Med Breathing Mix CGA 280 Outlet P d Manifold Outlet 1 2 NPT male pipe thread located Ni isi on the top center of the cabinet 1 15 p WESTERN Relief Valve 1 2 NPT male pipe thread located Manifold on the top left side of the cabinet Ne Control Ses Cabinet Ail 61 ner st kB ap FIGURE 1 2 Connection Locations 1 2 B20353 ECN 13787 0701 ADJUSTMENT SPECIFICATIONS Primary Intermediate Pressure Line Line Regulator Pressure Switch Regulators Pressure Relief Valve Relief Valve haa 195 205 120 125 295 305 220 225 160 165 FHM2HL 235 245 120 125 Unit above are PSIG v4 0 x and up 170 175 v2 02 All testing must be done with full cylinders Primary regulator set pressure will vary with changing inlet pressures Software version is located on back of circuit board CAUTION e Resetting adjusting manifold components with cylinders that are not full may cause the manifold to function improperly B20353 ECN 13787 0701 RECOMMENDED TOOLS AND TEST EQUIPMENT Volt Ohm meter Isopropyl alcohol Phillips screwdriver Flat blade screwdriver Needle nose pliers Wire cutters 5 32 hex key wrench 5 8 hex socket wrench 13 16 hex socket wrench Set of combination wrenches 1 4 thru 1 1 1 8 1 3 8 1 1 2 and 1 3 4 Krytox 240 AC Liquid leak detector Teflon tape Av
8. FIGURE 4 9 Line Regulator 4 13 B20353 ECN 13787 0701 PCB Replacement Removal 1 2 Open the manifold as explained in the How to open the Manifold section Remove power by disconnecting the cable from the power supply Remove the 4 hex nuts holding the PCB cover in place Remove the 2 wire clips from the PCB Pop the PCB off the door Replacement 1 2 3 Align the PCB on the standoffs and carefully press into place Install the two wire clips to the PCB Install the PCB cover and tighten the 4 hex nuts Reconnect power 4 14 B20353 ECN 13787 0701 ELECTRICAL POWER UP Software version 4 0 x and higher 1 When power is applied to the manifold the displays will cycle through a power up sequence before displaying pres sure This process takes approximately 12 seconds All six status indication lights will be lit A solenoid test will be performed on each bank The left green status light will turn off and on followed by the right green status Switches light A noticeable click can be heard from each solenoid valve The state of the DIP switches will be shown on the right bank display and right most digits of the left bank display A 1 represents each open switch a 0 for closed The status lights will extinguish in the order green yellow red for each bank Each digit of the displays will read 8 A pressure switch status test will be conducted If the
9. 8P RWS 1 12 RWS 3 26 RWS 3 17 RWS 3 28 WLR 14 200L RWS 5 1 RWS 6 9 RO 015E RWS 6 8 RWS 6 3 RWS 6 5 RWS 1 8 5 8 KEY DESCRIPTION 15 16 17 18 19 20 Teflon Ring Filter Spring Retainer Regulator Body Pipe Away Adaptor Relief Valve FHM2 FHM2HL FHM2HP 1 4 NPT Plug 90 Elbow 3 8 Tube CGA 580 Nut CGA 580 Nipple Bushing 1 8 x 1 4 Elbow Tee 1 4 x 1 4 Adaptor Item included in repair kits PART RWS 3 47 5 5 RWS 3 81 RWS 1 3 WMV 4 7 WMV 4C 300 WMV 4C 450 P 4HP WLF 3 6 92 15 8 BB 2 4HP BL 4HP BST 4LP BA 4LP B20353 ECN 13787 0701 Western Enterprises Repair Drawing Automatic Changeover Manifold FHM2 FHM2HL amp FHM2HP Series Check Valve Components qu KEY DESCRIPTION PART 1 Poppet WMV 1 5 2 Spring WMV 1 6 3 Washer WMV 1 7 4 Cap WMV 1 8 Repair Kit for FHM2 FHM2HL RK 1041 FHM2HP series All items included in repair kit B20353 ECN 13787 0701 Western Enterprises Repair Drawing Automatic Changeover Manifold FHM2 FHM2HL amp FHM2HP Series Power Supply Components A stern A A 9 5 Dew 59 b
10. Check Valve FHM2 SERIES PRINTED CIRCUIT BOARDS CALIBRATED WME 8 98A PCB Calibrated for FHM2 Air N gt WME 8 98B PCB Calibrated for FHM2HL CO amp WME 8 98C PCB Calibrated for FHM2HP Air He N2 O2 5 2 B20353 ECN 13787 0701 Western Enterprises Repair Drawing Automatic Changeover Manifold 2 amp FHM2HP Series Components amp Miscellaneous Hardware 19 32 48 24 29 KEY DESCRIPTION 1 O N 10 11 12 13 14 15 16 Right Inlet Block Assembly Left Inlet Block Assembly Right Primary Assembly Left Primary Assembly Right Side Check Valve Assembly Right Primary CV to CV Block Tube Left Side Check Valve Assembly Left Primary CV to CV Block Tube Pressure Switch FHM2 FHM2HL FHM2HP Oxygen Center Block Assembly Left Line Regulator Assembly FHM2 FHM2HP Right Line Regulator Assembly FHM2 FHM2HP Bulkhead to RV Block Tube Relief Block Assembly Line RV to RV Block Tube Backplate Assembly PART WMS 13 3 WMS 13 4 WMS 14 31 WMS 14 30 WMS 14 20R WMS 14 15 WMS 14 20L WMS 14 16 WME 4 4 WME 4 4C WMS 14 2 WLR 14 50L WLR 14 200L W
11. Model FHM2HL Model FHM2HP Left Display Right Display Left Display Right Display Left Display Right Display 0 0 011 1 0 010 01010 00 0 0 1 1 9 4 17 B20353 ECN 13787 0701 TRANSDUCERS HIGH PRESSURE Removal 1 Shutdown and open the manifold as explained in the How to shut down the Manifold and How to open the Manifold sections NOTE e This item may be replaced without shutting down the manifold completely To work on the manifold while it is still in service follow the steps in How to open the Manifold and How to deplete the Service Bank sections 2 Using a 7 8 open end wrench turn the high pressure transducer counter clockwise If gas is heard escaping stop rotating the transducer and wait for the trapped pressure to deplete 3 Clean any remnant of Teflon tape from the port on the inlet block Replacement 1 Apply Teflon tape to the 1 4 NPT thread on the new transducer leaving the first thread exposed 2 Using a 7 8 open end wrench thread the transducer into the inlet block TRANSDUCER LINE PRESSURE Removal 1 Shutdown and open the manifold as explained in the How to shut down the Manifold and How to open the Mani fold sections NOTE e The manifold must be fully shut down in order to replace the line pressure transducer 2 Using a 7 8 open end wrench turn t
12. cA EL eode 2 6 E 2 7 Solenoid Bypass Check 2 7 Solenoid Valve REC 2 8 Pressure SWitchx z u ug adel 2 8 Line Pressure Regulator tedio Rud 2 9 Pressure 5 ooi neret ere eee vet ed 2 9 SECTION 3 3 1 FIELD TESTING AND TROUBLESHOOTING Performance Verification Procedure 3 1 Troubleshooting eee 3 4 SECTION 4 4 1 SERVICE PROCEDURES n DR one 4 1 Safety PrecautilOns m rh E tbt eet 4 1 Cleaning Lubrication i i rtt ettet 4 2 General Repair 4 3 How to Open the Manifolds uu L 4 3 Manifold Cabinet Case 4 3 How to Deplete the Secondary 4 4 How to Shut Down the
13. door of the manifold e Locate the DIP switches at the bottom edge of the PC Board on the door e For PSI set the switches as shown Model FHM2 Model FHM2HL Model FHM2HP tata fetta fatten Switch Position e For KPa set the switches as show Model FHM2 Model FHM2HL Model FHM2HP 444 445 gy e For BAR set the switches as shown Model FHM2 Model FHM2HL Model FHM2HP FILLES Close the cover and reconnect power to the manifold e Verify that during power up the status of the switches are displayed on the digits of the right bank display and the right most digit of the left bank display as a series of 1 s and 0 5 as follows 4 16 B20353 ECN 13787 0701 DIP SWITCH DISPLAY OPTION e For PSI Model FHM2 Model FHM2HL Model FHM2HP Left Display Right Display Left Display Right Display Left Display Right Display 11 011110 11 01010 11 00 110 e For KPA Model FHM2 Model FHM2HL Model FHM2HP Left Display Right Display Left Display Right Display Left Display Right Display 011 011111110 011 01010 01 0 0 111 0 e For BAR Model FHM2
14. for external leakage 2 Check valves for closure ability Annually 1 Check relief valve pressures 2 Check primary regulator seats Manifold header 8 Daily 1 Observe Nitrous Oxide and Carbon Dioxide systems for cylinder frosting or surface condensation Should excessive condensation or frosting occur it may be necessary to increase manifold capacity Monthly 1 Inspect valves for proper closure 2 Check oylinder pigtails for cleanliness flexibility wear leakage and thread damage Replace damaged pig tails immediately 3 Inspect pigtail check valves for closure ability SAFETY PRECAUTIONS WARNING e Repairs to manifold high pressure regulators valve connections and piping should be made only by qualified personnel Improperly repaired or assembled parts could fly apart when pressurizing causing death or serious injury Examine all parts before repair Note Because manifold parts may be exposed to high pressure Oxygen and Nitrous Oxide and the condition of the unrepaired parts is unknown a repair inspection should be per formed before exposing the parts to high pressure gas Keep manifold parts tools and work surfaces free of oil grease and dirt These and other flammable materials may ignite when exposed to high pressure Oxygen or Nitrous Oxide Use only proper repair tools and parts Parts for Western manifolds are shown in this instruction Special tools are called out as needed Before connectin
15. lights digital readouts for both cylinder pressure and line pressure internal intermediate and line pressure gauge internal dual line assembly and line relief valve Supply banks consist of a header with 24 stainless steel flexible pigtails with check valves individual check valve bushings master shut off valves and union connections for attachment to the control unit The main components of the manifold are shown in Figures 2 1 through 2 3 Figures 2 4 and 2 5 show the piping schematics Figure 2 6 is the schematic diagram of the electrical system of the manifold Figure 2 7 is the heater schematic The cylinder bank that supplies the piping system is known as the Service supply while the cylinder bank on stand by is referred to as the Secondary supply Gas flows from the cylinder through the pigtails check valves headers and shut off valves into the left and right inlets of the control section Gas enters the manifold cabinet and enters a pressure transducer The pressure transducer displays the bank pressure on the front of the cabinet The transducer also monitors bank pressure and signals all connected alarms when the sys tem changes from the service to the secondary bank Gas then flows to the primary regulators on all manifolds except those for Nitrous Oxide and EN Carbon Dioxide service Nitrous Oxide and Master Valve Carbon Dioxide systems include a 500 SCFH capacity heater The thermostatically controlled he
16. pivot the bonnet spring is compressed and puts a downward force on the diaphragm sub assembly The bottom of the diaphragm sub assembly is in direct contact with the seat holder and stem When the diaphragm is forced down by the spring the stem is pushed away from the nozzle and gas can then flow from the high pressure chamber to the low pressure chamber When the low pressure chamber fills with gas the gas will push upward against the diaphragm sub assembly As the pressure con tinues to build in the low pressure chamber more upward force will be exerted against the diaphragm and the diaphragm will push up against the bonnet spring compressing the bonnet spring As the diaphragm is gradually raised by the gas pressure the seat and nozzle gradually come closer together filling the low pressure chamber slowly and eventually the upward pressure exerted by the gas will be slightly greater than the downward pressure of the bon net spring and the seat nozzle will close As gas is released from the low pressure chamber a proportional amount of gas will be let into the low pressure area from the high pressure chamber As the Gas from Solenoid Valve Gas from Intermediate Block adjusting screw is turned in farther and the bonnet spring com pressed the gas pressure required to lift the diaphragm increases FIGURE 2 9 Check Valve resulting in a higher delivery pressure from the outlet port of the regulator CHECK VALVES The check valves prevent
17. red and green status lights are on the pressure switch is in an open state no inlet pressure wired incorrectly broken connection Otherwise no status lights will be on Each digit of the display will be lit individually 2 The displays and status indicators will then be allowed to operate normally Software version 2 02 1 When power is applied to the manifold the displays will first cycle through a power up sequence before displaying pressure This process takes approximately 16 seconds All six status indication lights will be lit The lights will turn off sequentially The status of the DIP switches will be shown on the digits of the right bank display and the right most digits of the left bank display A 1 represents each open switch a 0 for closed Each digit of the displays will read 8 Each digit of the displays will be lit individually 2 The displays and status indicators will then be allowed to operate normally Software version located on back of PCB 4 15 B20353 ECN 13787 0701 UNITS OF MEASURE 1 The FHM2 manifold can be configured to display pressure in PSI KPa or BAR The manifold is shipped with PSI as the default unit of measure To switch the units proceed to step 2 If PSI units are desired no changes are necessary and step 2 may be skipped 2 To change the units perform the following steps Remove power to the manifold switches are only read during power up Open the
18. relief valve PROBABLE CAUSE Leakage at oylinder valve Gauge leaks Regulator leaks Line regulator setting too high Overpressure due to creeping or faulty regulation by primary regulator Regulator freeze up Nitrous oxide or Carbon Dioxide Heater failure Nitrous oxide or Carbon Dioxide REMEDY OR CHECK Replace oylinder valve Reseal or replace Repair or replace Set delivery pressure to specification Replace regulator seat and nozzle components Reduce the flow demand or increase the number of supply cylinders Reduce the flow demand or increase the number of supply cylinders Gas leakage around regulator body or bonnet Loose bonnet Diaphragm leak Tighten bonnet Replace diaphragm Gas leakage around valve stem or packing nut on master valve or header valve LOSS OF RESERVE BANK CONTENTS Both banks feeding Opposite bank feeding Valve packing leaks Faulty valve Solenoid valve seat leak Faulty primary regulator Loss of electrical power Faulty primary regulator Faulty solenoid bypass check valve Solenoid valve wiring incorrect Tighten packing nut Repair or replace valve Replace solenoid valve Replace regulator seat and nozzle components Check electrical power supply Replace regulator seat and nozzle components Replace solenoid bypass Swap wiring from one solenoid valve to the other B20353 ECN 13787 07
19. status PROBABLE CAUSE Power supply wiring is incorrect Flow demand too high Power supply PCB defective REMEDY OR CHECK Check wiring connection on both power supply terminal strips Reduce flow demand Replace power supply PCB Remote alarm signals are opposite of manifold status Faulty connection to remote alarm unit ABNORMAL LINE PRESSURE SIGNAL Low pressure alarm activated Line pressure regulator improperly adjusted Closed master valves header valves or cylinder valves Empty cylinders Check input from alarm unit to terminal strip Readjust line pressure regulator Slowly open valves Replace with full cylinders High pressure alarm activated LOSS OF CYLINDER CONTENTS Audible or inaudible gas leakage origin unknown Line regulator setting too high Regulator freeze up Nitrous Oxide or Carbon Dioxide Faulty pressure transducer Faulty PCB Leakage at manifold piping connections Leakage in downstream piping connections Leakage at manifold tubing system 3 6 Readjust line pressure regulator Reduce the flow demand or increase the number of supply cylinders Replace pressure transducer Replace PCB Tighten reseal or replace Tighten reseal or replace Repair as necessary B20353 ECN 13787 0701 SYMPTOM LOSS OF CYLINDER CONTENTS continued Audible or inaudible gas leakage unknown origin continued Venting at
20. the cylinder contents readouts the right cylinder bank pressure should begin to drop the left cylinder bank reading should remain constant Observe the right intermediate gauge as the right side pressure continues to drop As the cylinder pressure drops on the right side the intermediate area also loses pressure Verify that the pressure falls to 208 psig before the opposite solenoid valve opens see Specification Chart in Section 1 S I o w l y open one cylinder valve on the right bank of cylinders Verify that the intermediate gauge has returned to the set pressure of the primary regulator 35 36 37 38 39 40 41 42 43 44 45 46 3 2 Close the cylinder valve on the left bank of cylinders Observe the cylinder contents gauges the left bank gauge should begin to drop the right cylinder bank should remain constant Observe the intermediate gauge as the right side pres sure continues to drop As the cylinder pressure drops on the left side the intermediate area also loses pres sure Verify that the pressure falls to 208 psig before the opposite solenoid valve opens see specification chart in Section 1 S l o w l y open one cylinder valve on the left bank of cylinders Verify that the intermediate gauge has returned to the set pressure of the primary regulator Close the bleeder valve Disconnect the 3 wires from the manifold wiring har ness that leads to the intermedi
21. when one bank is empty and changeover occurs Master valve header valves or cylinder valves on bank are closed Wiring to pressure transducer not correct Change over occurring at too high a pressure Slowly open valves Check internal leads to the pressure transducer Check transducers and pressure Switch setting Green indicator light does not come on even though both banks are full New service side set without changing empty cylinders Pressure transducer wiring incorrect or disconnected Pressure transducer reading too high a pressure Replace depleted cylinders Check pressure transducer wiring Replace pressure transducer Display reads 0 even when pressure is present Display incorrect Pressure transducer wiring disconnected or faulty Pressure transducer faulty Dip switches set incorrectly Check pressure transducer and controller board connections Replace transducer Check setting of the Dip switches One or both of the red indicators are blinking No display on the green indicator flashing Pressure transducer faulty Non volatile memory failure Input out of range during calibration routine 3 5 Replace transducer Replace the controller board Adjust the line and primary regulators prior to calibration B20353 ECN 13787 0701 SYMPTOM RESERVE IN USE SIGNAL Remote alarm signal stays in one mode constantly regardless of changeover
22. 01 9 Close the bleeder valve Using a allen wrench turn the knurled adjustment screw on the pressure switch clockwise to raise the set point or counterclockwise to lower the set point The pressure switch should be set per the Adjustment Specification chart in Section 1 Cycle between actuation and re actuation signal and make adjustments as required to achieve the signal setting The setting should be made on descending pressure Make adjustments in response to the reading obtained in step 4 WARNING e sure power is off when electrical connections are made Current flowing though the wires may shock the service technician or damage the Ohmmeter or pressure switch After the setting has been made connect the signal wires to the appropriate contacts on the pressure switch CHECK VALVE REPAIR INTERMEDIATE Removal 3 Open and shutdown the manifold as explained in the to open the manifold and How to shut down the mani fold sections Mark the compression fittings per the instructions on page 4 2 Disconnect the tubing at the compression fittings from the solenoid valve and the intermediate block using an 11 16 open end wrench Remove the check valve and tubing assembly from the control section Disassembly 1 Secure the check valve in a vise or similar holding fixture Using a 1 1 8 hex wrench rotate the valve cap counter clockwise and remove Remove the seal washer from the valve ca
23. 01 SYMPTOM Premature changeover to reserve bank PROBABLE CAUSE Flow demand too high Faulty Transducer Faulty PCB REMEDY OR CHECK Readjust line pressure regulator Replace Transducer Replace PCB PIPELINE DISTRIBUTION Pipeline not at desired pressure Required gas flow not available Line regulator not set correctly Line regulator not set correctly Flow demand too high Adjust line regulator Adjust line regulator Consult factory MANIFOLD LOCKS UP OR WON T FLOW Reserve bank won t flow or the manifold locks up and neither bank will flow Leakage at outlet fitting of the solenoid that will not open O Remove power from the system Close valves on the cylinders Deplete gas from the headers by cracking open a fitting Tighten solenoid outlet fitting Open the oylinder valves Reconnect power to the manifold Primary regulator set pressure 150 psig higher than the change over pressure 3 8 O N Remove power from the system Close valves on the cylinders Deplete gas from the headers by cracking open a fitting Reset the primary regulator Open the oylinder valves Reconnect power to the manifold B20353 ECN 13787 0701 SECTION 4 SERVICE PROCEDURES GENERAL MAINTENANCE 1 Main section 8 b Daily 1 Record line pressure Monthly 1 Check regulators valves and compression fittings
24. 0353 ECN 13787 0701 Western Enterprises Repair Drawing Automatic Changeover Manifold FHM2HL Series Components amp Miscellaneous Hardware 31 20 17 8 24 5g 19 28 13 11 10 4 30 2 KEY DESCRIPTION PART KEY DESCRIPTION PART 1 Right Inlet Block Assembly WMS 13 3 18 Exit Block Assembly WMS 14 38 2 Left Inlet Block Assembly WMS 13 4 19 Bulkhead Connector WLF 3 49 3 Right Primary Assembly WMS 14 31 20 Relief Tube Adaptor WLF 3 12 4 Left Primary Assembly WMS 14 30 21 Left Solenoid Valve Assembly WMS 14 12 5 Right Side Check Valve Assembly WMS 14 20R 22 Right Solenoid Valve Assembly WMS 14 13 6 Right Primary CV to CV Block Tube WMS 14 15 23 Hole Plug WME 8 97 7 Left Side Check Valve Assembly WMS 14 20L 24 Line Pressure Gauge WMG 3 3 8 Left Primary CV to CV Block Tube WMS 14 16 25 Inlet Transducer WME 9 1A 9 Pressure Switch WME 4 4 26 Intermediate Gauge G 15 400W 10 Center Block Assembly WMS 14 2 27 Ball Valve WMV 5 13 11 Left Line Regulator Assembly WLR 14 50L Ball Valve O Ring RO 303E 12 Right Line Regulator Assembly WLR 14 50R 28 Bleeder Valve 203 13 Bulkhead to RV Block Tube WMS 14 18 29 Line Relief Valve WMV 4C 75 14 Relief Block Assembly WMS 14 1 30 Inlet Union WMS 1 40 15 Line RV to RV Block Tube WMS 14 17 31 Nipple D 20 16 Backplate Assembly WMS 14 24 32 Nut D 7 17 Line Transducer WME 9 3A 33 Heater WMS 13 37 5 5 B20353 ECN 13787 0701 Western Enterprises Automatic Cha
25. 14 RWC 2 8P RWS 1 12 RWS 3 26 RWS 3 17 RWS 3 28 WLR 14 200L RWS 5 1 RWS 6 9 RO 015E RWS 6 8 RWS 6 3 RWS 6 5 RWS 1 8 5 7 KEY DESCRIPTION 15 16 17 18 19 20 Teflon Ring Filter Spring Retainer Regulator Body Pipe Away Adaptor Relief Valve 2 FHM2HL FHM2HP 1 4 NPT Plug 90 Elbow 3 8 Tube CGA 580 Nut CGA 580 Nipple Bushing 1 8 x 1 4 Elbow Tee 1 4 x 1 4 Adaptor Item included in repair kits PART RWS 3 47 5 5 RWS 3 81 RWS 1 3 WMV 4 7 WMV 4C 300 WMV 4C 450 P 4HP WLF 3 6 92 15 8 BB 2 4HP BL 4HP BST 4LP BA 4LP B20353 ECN 13787 0701 Western Enterprises Repair Drawing Automatic Changeover Manifold FHM2 FHM2HL amp FHM2HP Series Right Regulator Components ii KEY DESCRIPTION Nut Preset Adjusting Screw Regulator Bonnet Bonnet Bushing Bushing Retainer Pivot Bonnet Spring Washer Slip Ring Diaphragm Assembly Nozzle for FHM2 9 Series for all other models Large O Ring Seat Holder and Stem for FHM2 FHM2HL FHM2HP FHM2 9 Series Valve Spring for FHM2 9 Series for all other models PART WMC 6 90 RWS 3 3 RWS 2 3P RWC 3 12 RWC 3 14 RWC 2
26. LR 14 50R WLR 14 200R WMS 14 18 WMS 14 1 WMS 14 17 WMS 14 24 Not Shown KEY DESCRIPTION PART 17 Line Transducer FHM2 WME 9 3A FHM2HP WME 9 2A 18 Exit Block Assembly WMS 14 38 19 Bulkhead Connector WLF 3 49 20 Relief Tube Adaptor WLF 3 12 21 Left Solenoid Valve Assembly WMS 14 6 22 Right Solenoid Valve Assembly WMS 14 7 23 Hole Plug WME 8 97 24 Line Pressure Gauge FHM2 WMG 3 3 FHM2HP WMG 3 4 25 Inlet Transducer WME 9 1A 26 Intermediate Gauge G 15 400W 27 Ball Valve WMV 5 13 u Ball Valve O Ring RO 303E 28 Bleeder Valve 203 29 Line Relief Valve FHM2 WMV 4C 75 FHM2HP WMV 4C 250 30 Inlet Union WMS 1 40 31 Nipple D 20 32 Nut D 7 5 3 B20353 ECN 13787 0701 Western Enterprises Automatic Changeover Manifold FHM2 amp FHM2HL Series Repair Drawing Components amp Miscellaneous Hardware 34 a 35 WESTERN 35 INNOVATOR LIN E PRESSURE morma NORMAL eme som LEFT RGHTBANK FULLY AUTO MATT HEALTH CAREGASM AN FO ID 35 35 KEY DESCRIPTION PART 33 Case WMC 2 59A 34 Outlet Union D 34 35 8 Sheet Metal Screw WMC 6 23 Case Wiring Harness WMS 13 51 u Switch Wiring Harness WMS 1 13 T Power Supply Box WMS 13 23 Manifold WME 8 98 Item Not Pictured 5 4 B2
27. ailable from local source Available from local source Available from local source Available from local source Available from local source Available from local source Available from local source Available from local source Available from local source Available from local source Available from Du Ponte Wilmington Delaware Available from Western Enterprises Part number LT 100 Available from Western Enterprises Part number MTT 1 or MTT 2 Teflon is a registered trademark of E du Pont de Nemours amp Co Inc Krytox is a register trademark of E du Ponte de Nemours amp Co Inc B20353 ECN 13787 0701 SECTION 2 THEORY OF OPERATION GENERAL INFORMATION This section concentrates on the basic theory of operation of the components of the fully automatic changeover manifold The first part of this section is an operating summary and traces the flow of gas through the various components of the manifold The second part of this section explains in detail the operation of the individual components contained in the manifold control section MANIFOLD OPERATION The automatic changeover manifold consists of a manifold control and two supply bank headers one service and one secondary supply to provide an uninterrupted supply of gas for the specific gas application The manifold control in cludes the following components and features green in service yellow ready for use and red bank depleted indica tor
28. arbon Dioxide cylinder manifold will depend upon conditions at the installation site demands of the delivery system and the number of cylinders in supply service Capability is 500 SCFH at 50 psig delivery and 750 psig inlet pressure Installing a Carbon Dioxide manifold in a location which exposes it to ambient temperatures below 20 F 7 C is not recommended Power Source Requirements A 115 VAC 24 VAC power supply is provided with the manifold to operate the status lights on the manifold Under nor mal operation the manifold will draw a maximum of 1 5 amperes A five terminal remote alarm terminal strip is on the right side of the circuit board in the power supply box for remote alarm interfacing The top three terminals on this strip N C N O and C provide dry contacts for hookup to the hospital or clinic s medical gas alarm system Contacts are rated up to 3 amps 30 VDC or 2 amps 250 VAC Nitrous Oxide and Carbon Dioxide systems include a 500 SCFH capacity heater The thermostatically controlled heater warms the gas before entering the primary regulator preventing freeze up The heater operates at 115 VAC and draws 4 amperes Piping Connections Header Inlets Carbon Dioxide CGA 320 Nitrous Oxide CGA 326 Breathing Air CGA 346 540 Pad Relief Valve pply Helium CGA 580 Box E Delivery Pipeline Nitrogen CGA 580
29. art of the manifold for maintaining the stand by or reserve bank The solenoid valves are constructed of two basic functional units a solenoid electromagnet with its core and a valve body containing one or more orifices See Figure 2 11 Flow through an orifice is stopped or allowed by the action of the core when the sole noid is energized or de energized The solenoid is mounted directly on the valve body The core is enclosed and free to move in a sealed tube providing a compact packless assembly The valve has a pilot and bleed orifice and utilizes the line pressure for operation When the solenoid is energized the pilot orifice is closed and full line pressure is applied to the top of the diaphragm through the bleed orifice thereby pro viding a seating force for tight closure When the solenoid is de energized the core opens the pilot orifice and relieves pressure from the top of the valve diaphragm to the outlet side of the valve This results in an unbalanced pressure which causes the line pressure to lift the diaphragm off the main orifice thereby opening the valve HOUSING SOLENOID COIL OR 2 1 MOVABLE CORE DIAPH BLEED ORIFICE INLE FIGURE 2 11 PRESSURE SWITCH The pressure switch is used as a redundant safety feature to signal Secondary in Use The swit
30. ate pressure switch Note Alarm will sound and red indicator lights will be lit Connect an ohmmeter across the black and brown wires of the wiring harness The ohmmeter should indicate approximately zero 0 ohms resistance If the ohmmeter does not indicate approximately zero 0 ohms connect the meter across the normally open N O and common C terminal on the pressure switch The ohmmeter should register approximately zero 0 ohms resistance when connected to the switch Adjust or replace the faulty switch See Sec tion 4 for servicing the pressure switches Disconnect the ohmmeter leads from the black and brown wires Close the Cylinder valve on the left bank of cylinders Open the bleeder valve to create a slight flow of gas through the manifold Verify an ohmmeter reading of infinite resistance as soon as the intermediate gauge pressure drops to the value for the pressure switch setting indicated in the specification chart in Section 1 S I o w l y open one cylinder valve on the left bank of cylinders B20353 ECN 13787 0701 4T 48 49 50 51 52 53 54 55 56 Verify that the ohmmeter returns to approximately zero 0 ohms resistance Remove the ohmmeter leads from the black and brown wires Connect the switch wires to the manifold wiring harness Close all cylinder valves and vent all remaining gas from the manifold Close the bleeder valve Observe the cabinet status i
31. ater warms the gas before entering the regulator preventing freeze up and loss of pressure due to the extreme EEFT BANE low temperatures generated when these gases rapidly expand gt D Header Check Valves FIGURE 2 1 External Components Pressure is regulated in the primary regulators to the pressures noted in the adjustment specification chart in Section 1 Both primary regulators are factory preset to deliver the same pressure The primary regulators have two ports on the low pressure side One port is connected to the intermediate relief valve and intermediate pressure gauge The other port is the outlet port and is connected via fittings to the solenoid valves The gas flows from the primary regulators to the solenoid valves The solenoid valves are either open or closed depend ing on which side is in Service and whether the Reserve cylinders have adequate pressure The solenoid valve on the side that is in Service will be open The solenoid valve on the Reserve side will be closed if the cylinder pressure on that side is above the pressure transducer setting The Service side is determined by whichever side of the manifold is initially pressurized Gas on the Reserve side is stopped at this point by the closed solenoid valve The gas from the Service side contin ues to flow entering a check valve after leaving the solenoid valve The check valve prevents the gas from flowing back ward toward t
32. ating a mini mum of 50 psig on all system except Nitrogen Nitro gen should indicate a minimum of 160 psig Adjust to the proper line pressure if necessary Open the bleeder valve to create a slight flow of gas through the manifold Observe the intermediate gauge and verify the primary regulator setting under a flow condition Adjust the left primary regulator as necessary to obtain the required pressure Turn off the left cylinder valve and allow all gas to vent from the manifold Close the bleeder valve B20353 ECN 13787 0701 21 22 23 24 25 26 2T 28 29 33 31 32 33 34 S I o w l y open one cylinder valve the right bank of cylinders Complete steps 11 21 for the right primary regulator Close the bleeder valve Pressurize the right bank by opening one cylinder valve Verify that the line pressure regulator is functioning properly by observing the line pressure gauge for two minutes The gauge should indicate the same pressure at the end of the two minute period Open the bleeder valve to create a slight flow of gas through the manifold Verify that the line pressure regulator maintains a constant pressure by observing the line pressure gauge S l o w l y open one cylinder valve on the left bank of cylinders Observe the cylinder contents pressure gauges to verify cylinder pressure Close the cylinder valve on the right bank of cylinders Observe
33. ch is a piston type with one common contact one normally closed contact and one normally open contact See Figures 2 12 and 2 13 When the manifold is pressurized to the normal pres sures the piston in the switch is pushed up The pis ton pushes the activator of the switch up This action closes the normally open contact and opens the normally closed contacts As gas from the cylinder banks is depleted the piston moves down releasing the force against the switch activator The contacts of the switch then return to the normally open and normally closed positions The switch completes the electrical circuits to the indi cators on the front of the control section and to the remote alarm interface board in the power supply box Switch a e IU gt End View Adjusting Screw Pressure Port Side View FIGURE 2 12 Low Pressure Switch mE FIGURE 2 13 Switch Schematic 2 8 B20353 ECN 13787 0701 LINE PRESSURE REGULATOR The line pressure regulator used in the manifold is a single stage four port adjustable regulator Refer to Figure 2 14 It has one inlet port and three outlet ports The inlet port is piped to the outlet of the manifold control assembly One outlet port is piped to the outlet of the dual line assembly for connection to the main pipeline The other two outlet ports are plugged Gas enters the regulator through the inlet port and with
34. diate block assembly The inter mediate block has 4 ports all connected to the same chamber The gas pressure at all 3 ports is the same as the pres sure at the inlet to the block Gas enters the intermediate block from the Service supply through the tubing connected at either the right or left side depending on which side is in service The opposite side would then be the reserve side The top port connects to the inlet of the dual line assembly The bottom port is connected to a pressure switch The pressure switch monitors the intermediate pressure Should the intermediate pressure drop below a preset level the switch will indicate an alarm condition that changeover has occurred The switch provides a redundant feature to ensure proper changeover and alarming has taken place The intermediate pressure relief valves prevents over pressurization of the intermediate controls of the manifold should the primary regulators fail The relief valve settings are noted in the adjustment specification chart in Section 1 As the gas enters the dual line assembly it can flow to either line regulator Under normal operation one line regulator will be isolated by closed ball valves This regulator would only be used if the other regulator failed Gas flows through the line regulator on the side with the open ball valves The pressure is reduced to the line pressure which is shown on the line pressure gauge and on the digital display on the front of the cabinet T
35. essurized first The intermediate pressure is indicated by the gauges located on the respective primary regulator The line pressure is indicated by the digital readout as well as the gauge located on the outlet block As the gas from the Service supply is depleted the gas pressure to the Service primary regulator will begin to fall Simultaneously the pressure to the pressure switch intermediate block and the line regulator also falls When the Service side pressure falls below the set point of the bank pressure transducer the red bank depleted light comes on and the green in service light is extinguished Any remote alarms are activated at this time When the Service pressure falls to the set point of the pressure transducer the solenoid valve opens and the secondary supply begins to supply the system After replacing empty cylinders and opening the cylinder valves the pressure transducer will extinguish the red bank de pleted light and the yellow ready for use light will come on energizing the secondary bank solenoid valve The system incorporates a fail safe configuration so that the red light can only be extinguished when sufficient pressure is supplied from both banks PRIMARY REGULATORS The primary regulator s function is to reduce the cylinder pressure of the supply banks to a more usable regulated pres sure e Bonnet Spring
36. et Position core small end up on plugnut assem bly 5 Replace solenoid base sub assembly and torque 117 25 in lbs WARNING Be sure power is off when electrical connections are made Current flowing through the wires my shock the service technician 6 Replace solenoid enclosure and retaining cap or clip 7 Connect the wires to the appropriate wires coming from the manifold controller PCB 8 After maintenance restore power to the system and operate the valve several times to be sure of proper opening and closing 4 10 B20353 ECN 13787 0701 hu m Retaining Clip ln Washer Solenoid Valve T Spring Washer Diaphragm Return Spring 9 T E Pinger Tube Assembly Plunger Tube Assembly Gasket Torque plunger tube assembly to 117 25 inch pounds Hand tighten all cover screws first Torque cover screws a crisscross manner to 110 10 inch pounds Parts included in rebuild kit FIGURE 4 8 Parker Solenoid Valve 4 11 B20353 ECN 13787 0701 LINE REGULATOR REPAIR Refer to Figure 4 9 Removal 2 3 Turn the two ball valves to feed the reserve line regulator and close the two ball valves to isolate the service regula tor The manifold does not have to be shut down Using 7 8 and 1 wrenches disconnect the union connections on both sides of the regulator Carefully remove the line regulator from the manifold Disa
37. g resprung into sealing position Then snug the nut 1 12 of a turn 1 2 of a wrench flat past the original position Leak Testing There are four types of manifold piping connections sealed soldered threaded unions and elbows compression tubing connections and gasket diaphragms and o rings When leak is suspected and cannot be easily located a leak detector solution should be applied to all connections in the event of leaks at more than one connection Be certain to wipe fittings dry after testing Western s LT 100 leak detector dries clean and will not harm apparatus If a leak is detected at sealed connections replace the assembly which is joined by the leaking connection threaded connections union sealing surfaces may have burrs or nicks which may be polished out Be certain to clean parts before reassembly If the surface will not seal replace the union Elbows and tees may be cleaned of old sealant and resealed with Teflon tape Refer to cleaning sealing and lubricating instructions compression fittings sealing surfaces of fittings or brass ferrules may be damaged and must be replaced Refer to the parts list for appropriate part numbers gasket seals leaks may occur at seals made by gaskets such as diaphragms or o rings Gas may leak to atmosphere or across the seal into the opposite pressure circuit External leaks are evidenced by application of leak detector while leaks across the seal are detected by fau
38. g the cylinder to the manifold momentarily open and close the cylinder valve to blow out any dirt or debris After connecting the cylinder to the manifold open the cylinder valve s l o w I y to allow the heat of compression to dissipate Use only cleaning agents sealants and lubricants as specified in this instruction 4 1 B20353 ECN 13787 0701 CLEANING LUBRICATION AND SEALING Clean metal parts of the manifold with isopropyl alcohol or oxygen compatible media prior to assembly Dry thoroughly Teflon amp Tape Application Threaded pipe connections should be sealed with Teflon tape Remove the old sealant from both male and female threads Apply Teflon tape to the male pipe thread Approxi mately 1 1 2 turns of tape should be sufficient Do not cover the first thread with tape Assemble the fittings wrench tight to effect a gastight seal Assembly and Disassembly of Compression Fittings NOTE Incorrect re assembly of fittings may initially seal however they may start to leak over time Mark the fitting and nut prior to disassembly Before re tightening make sure the assembly has been inserted into the fitting until the ferrule seats in the fitting Retighten the nut by hand Tighten the nut with an appropriate wrench until the marks line up which indicates that the fitting has been tightened to its original position A noticeable increase in me chanical resistance will be felt indicating the ferrule is bein
39. gas from flowing backward See Figure 2 9 Gas enters the check valve from the solenoid valves and pushes the check valve seat assembly away from the sealing surface of the valve body This allows the gas to flow to the outlet port of the valve When the gas flow stops the spring of the check valve pushes the valve seat down on the sealing surface preventing any gas flow backward through the valve SOLENOID BYPASS The bypass is to provide gas to the outlet of the sole noid in case the outlet fitting leaks The bypass will ensure that the maximum pressure differential across the solenoid is not exceeded Gas enters the inlet of the bypass check valve from the solenoid inlet Gas also enters the outlet of the bypass from the outlet of the solenoid During normal operation the inlet and the outlet pressures are equal The by pass check valve is set around 130 psig it takes 130 psig differential from the inlet to the outlet to open the bypass check valve The only time this check valve will open is if the solenoid outlet fitting leaks If the outlet fitting leaks the bypass check valve will open and per mit gas to flow This flow of gas will ensure that the FIGURE 2 10 Solenoid Bypass Valve maximum allowable differential pressure of the solenoid is not exceeded 2 7 B20353 ECN 13787 0701 SOLENOID VALVES The solenoid valves are the he
40. gulator per compression fitting instructions on page 4 2 4 Crack open the compression fitting and allow the reserve bank to deplete CAUTION compression fitting on the secondary bank primary regulator should be used to deplete pressure from the reserve bank If a different fitting is used there may be pressure trapped in the secondary bank 5 Once pressure has been depleted retighten the fitting per the instructions on page 4 2 HOW TO SHUTDOWN THE MANIFOLD 1 Turn off the piping system isolation valve if present If an isolation valve is not present the entire buildings gas piping system will be reduced to atmospheric pressure WARNING Do not shutdown the manifold until all personnel have been advised of the intended service and all patients requiring medical gas are being supplied from portable supplies 2 Open the manifold as explained in the How to open the manifold section 3 Turn off right and left supply bank cylinder valves 4 Open the bleeder valve to vent residual gas from the system 5 Close the bleeder valve once all gas has depleted GAUGE REPLACEMENT Removal 1 Shutdown the manifold and open the manifold as explained in the How to open the manifold and How to shut down the manifold sections 2 Using a 9 16 open end wrench remove the subject pressure gauge from the system 3 Remove old sealant from the 1 4 NPT female pipe threads Replacement 1 Apply Teflon tape t
41. he high pressure transducer counter clockwise If gas is heard escaping stop rotating the transducer and wait for the trapped pressure to deplete 3 Clean any remnants of Teflon tape from the port on the inlet block Replacement 1 Apply Teflon tape to the 1 4 NPT thread on the new transducer leaving the first thread exposed 2 Using a 7 8 open end wrench thread the transducer into the inlet block 4 18 B20353 ECN 13787 0701 This page intentionally left blank 4 19 B20353 ECN 13787 0701 SECTION 5 MANIFOLD MAINTENANCE amp REPAIR PARTS REPLACEMENT PIGTAILS 24 Stainless Steel Flexible Braid with Check Valves PFP 320CV 2A 320 for Carbon Dioxide Service PFP 326CV 24 CGA 326 for Nitrous Oxide N20 Service WPR 63CV 24 CGA 540 for Oxygen O2 Service PFP 92CV 2A CGA 580 for Inert Gas Service N gt except Helium PFP 346CV 24 CGA 346 for Breathing Air Air Service 24 Synthetic Fiber Braid Hose with Check Valve PFS 92CV 24 CGA 580 for Helium He Service for non medical service GAUGES 2 Diameter 1 4 NPT Back Port 3 3 100 psi Line gauge FHM2 FHM2HL WMG 3 4 400 psi Line gauge FHM2HP G 15 400W 400 psi Intermediate Gauge REGULATORS Primary Regulators 5 14 27 Rig
42. he line relief valve prevents overpressurization should the line regulator fail The relief valve settings are noted in the adjustment specifications chart in Section 1 TO 120 VAC THERMOSTATS HEATER FIGURE 2 7 Heater Electrical Schematic 2 5 B20353 ECN 13787 0701 The line pressure regulator further reduces the pressure to the final pressure delivered to the medical gas piping system The regulator has one inlet port and three outlet ports Two outlet ports are plugged The delivery outlet port is located 180 from the inlet Gas flows out of the line regulator and into the outlet block The outlet block has 4 ports A line relief valve is connected to the right port The center port is connected to a line pressure gauge and bleeder valve The left port is connected to the line pressure transducer which displays the line pressure on the front of the cabinet The top port is connected to the pip ing distribution system The pressure relief valve outlet port should be routed to the outside of the building for manifolds located indoors When both cylinder banks are full the transducers and the switch complete the electrical circuit to display the green system normal light of the primary bank and a yellow ready for use light for the secondary bank Cylinder pressures for each bank are indicated on the readouts on the manifold front cover As stated the Service supply is determined by which bank is pr
43. he manifold as explained earlier in this section 2 Disconnect the electrical wires at the wire nut attachment points CAUTION e When metal retaining clip disengages it could spring upwards 3 Remove the retaining cap or clip spacer nameplate and cover 4 Slip entire solenoid enclosure off the solenoid base sub assembly 5 Unscrew the solenoid base sub assembly and remove the core plugnut gasket plugnut assembly and solenoid base gasket 6 Remove the four valve bonnet screws valve bonnet disc holder sub assembly disc holder spring diaphragm spring sub assembly and body gasket NOTE Should diaphragm spring sub assembly become disassembled be sure to replace the diaphragm spring support with the lip facing upward towards the valve bonnet 4 9 B20353 ECN 13787 0701 Reassembly 1 Reassemble in reverse order of disassembly paying careful attention to exploded views provided for identification and placement of parts see Figure 4 8 2 Replace body gasket and diaphragm spring sub assembly Locate bleed hole in diaphragm spring sub assembly approximately 45 from valve outlet Replace the disc holder spring and disc holder sub assembly 3 Replace valve bonnet and bonnet screws sliding valve under mounting bracket and lining up screw mounting holes Torque bonnet screw a crisscross manner to 110 10 in Ibs 4 Install solenoid base gasket plugnut assembly and plugnut gask
44. he solenoid valve when the reserve side is in use 2 1 B20353 ECN 13787 0701 LEGEND 1 Outlet Adaptor 2 Line Pressure Gauge 3 Ball Valves 4 Line Regulators 5 ntermediate Relief Valve 6 Bleed Valve 7 Pressure Switch 8 Intermediate Check Valves 9 Left Inlet Block 10 Primary Regulator 11 Intermediate Test Gauge 12 Relief Block 13 High Pressure Transducer 14 Line Pressure Transducer 15 Intermediate Pressure Relief Connection 16 Intermediate Block 17 Line Pressure Relief Valve 18 Relief Outlet Connection 19 Solenoid Bypass Check Valve 20 Right Inlet Block 21 Solenoid Valves FIGURE 2 2 Internal Components FHM2 amp FHM2HP 2 2 B20353 ECN 13787 0701 LEGEND 1 Outlet Adaptor 2 Line Pressure Gauge 3 Ball Valves 4 Line Regulators 5 Intermediate Relief Valve 6 Bleed Valve 7 Pressure Switch 8 Intermediate Check Valves 9 Left Inlet Block 10 Primary Regulator 11 Intermediate Test Gauge 12 Relief Block 13 High Pressure Transducer 14 Line Pressure Transducer 15 Intermediate Pressure Relief Connection 16 Intermediate Block 17 Line Pressure Relief Valve 18 Relief Outlet Connection 19 Solenoid Bypas
45. ht Primary Regulator FHM2 Air He 5 14 9 Right Primary Regulator for FHM2 Oxygen and Medical Mixture 5 14 29 Right Primary Regulator for FHM2HL amp N20 WMS 14 31 Right Primary Regulator for FHM2HP Air He 5 14 26 Left Primary Regulator for 2 Air He 5 14 8 Left Primary Regulator FHM2 Oxygen and Medical Mixture 5 14 28 Left Primary Regulator FHM2HL 8 5 14 30 Left Primary Regulator for FHM2HP Air He N gt Line and Intermediate Regulators WLR 14 50R Right Line Regulator for FHM2 amp FHM2HL series manifolds WLR 14 200R Right Line Regulator for FHM2HP series manifolds WLR 14 50L Left Line Regulator for FHM2 amp FHM2HL series manifolds WLR 14 200L Left Line Regulator for FHM2HP series manifolds REGULATOR REPAIR KITS Primary Regulator Kits RKS1037 Repair Kits for WMS 14 26 L amp R WMS 14 27 L amp R WMS 14 28 L amp R WMS 14 29 L amp R WMS 14 30 L amp R WMS 14 31 L amp R Primary Regulators 1038 Repair Kits for WMS 14 9 4 WMS 14 8 L amp R Primary Regulators 5 1 B20353 ECN 13787 0701 REGULATOR REPAIRS KITS co
46. hting the compression fittings follow the procedure outlined on page 4 2 4 6 B20353 ECN 13787 0701 PRIMARY REGULATOR ADJUSTMENT 1 If not already done open the manifold by following the How to open the manifold as explained earlier in this sec tion 2 Remove the nut from the primary regulator 3 Ifthe bank is not pressurized s l o w l y open the cylinders on the side of the regulator to be adjusted 4 Verify the cylinder pressure readout indicates a minimum pressure of 2000 psig for Oxygen Air and Nitrogen sys tems or a minimum of 700 psig on Nitrous Oxide and Carbon Dioxide systems 5 Create a slight flow of gas by cracking open the bleeder valve 6 Using a flat blade screwdriver turn the adjusting screw of the regulator while observing the test gauge rotating the set screw clockwise will increase the regulator setting while rotating it counterclockwise will lower the regulator setting Set the regulator to the pressure indicated on the Adjustment Specification chart in Section 1 7 Close the bleeder valve The test gauge will go up slightly higher than the flowing adjusted pressure 8 Verify that the regulator does not creep by observing the intermediate gauge for two minutes The gauge must indi cate the same pressure at the end of the two minute period 9 Install the nut on the primary regulator PRESSURE SWITCH REPLACEMENT Removal 1 Open and shutdown the manifold as explained in the How to open
47. ions is subject to change without notice WARRANTY Western Enterprises makes no warranty of any kind with regard to the material in this manual Including but not limited to the implied warranties of merchantability and fitness for a particular purpose Refer to the Installation and Operation Instructions manual for warranty information B20353 ECN 13787 0701 CAUTION Failure to adhere to the following instructions may result in person injury or property damage Never permit oil grease or other combustible materials to come in contact with cylinders manifold and connections Oil and grease may react and ignite when in contact with some gases particularly oxygen and nitrous oxide Cylinder header and master valves should always be opened very s l o w l y Heat of recompression may ignite combustible materials Pigtails should never be kinked twisted or bent into a radius smaller than 3 inches Mistreatment may cause the pigtail to burst Do not apply heat Some materials may react while in contact with some gases particularly oxygen and nitrous oxide Cylinders should always be secured with racks chains or straps Unrestrained cylinders may fall over and damage or break off the cylinder valve which may propel the cylinder with great force Oxygen manifolds and cylinders should be grounded Static discharges and lightning may ignite materials in an oxygen atmosphere creating a fire or explosive force Welding should ne
48. laced with full cylinders After new cylinders are in place and turned on no manual resetting of the manifold is necessary INSTALLATION INFORMATION Manifolds should be installed in accordance with guidelines stated by the National Fire Protection Association the Com pressed Gas Association OSHA and all applicable local codes The carbon dioxide and nitrous oxide manifolds should not be placed in a location where the temperature will exceed 120 F 49 C or fall below 20 F 7 C The manifolds for all the other gases should not be placed in a location where the temperature will exceed 120 F 49 C or fall below 20 F 29 C A manifold placed an open location should be protected against weather conditions During winter protect the manifold from ice and snow In summer shade the manifold and cylinders from continuous exposure to direct rays of the sun Leave all protective covers in place until their removal is required for installation This precaution will keep moisture and debris from the piping interior avoiding operational problems CAUTION Remove all protective caps prior to assembly The protective cap may ignite due to heat of recompression an oxygen system Overall Manifold Length Manifold 10
49. lty manifold function When replacing seals use care not to damage sealing surfaces 4 2 B20353 ECN 13787 0701 GENERAL REPAIR PROCEDURES Be sure all pressure and electrical power is removed from the system prior to initiating any repair procedures WARNING Do not shutdown the manifold until personnel have been advised of the intended service and all patients requiring medical gas are being supplied from portable supplies Patients still on the pipeline will not receive gas Note When servicing a manifold component with a repair kit use all components supplied with the kit HOW TO OPEN THE MANIFOLD Door Open 1 Turn the latch counter clockwise and open the door Door Closed 1 Close door and rotate knob clockwise until secure MANIFOLD CABINET COVER REMOVAL Disassembly 1 Open the manifold as explained in the How to open the manifold section 2 Disconnect the two wire harness terminal blocks from the manifold PCB 3 Using the appropriate screwdriver or 1 4 hex wrench remove the 4 screws 2 on each side holding the cover in place 4 Carefully pull the cover straight out to clear the components Reassembly 1 Reverse order of disassembly 4 3 B20353 ECN 13787 0701 HOW TO DEPLETE THE SECONDARY BANK 1 Open the manifold as explained in the How to open the manifold section 2 Close the cylinder on the secondary bank 3 Mark the compression fitting at the outlet of the primary re
50. ndicators Verify that both the green indicators and both the red indicators are illuminated S I o w l y open the cylinder valve on the left and right banks of cylinders Observe the cabinet status indicator Verify that the green and yellow indicators are lit and both red indicators are Close the cylinder valve on the service bank of cylinders Open the bleeder valve to create a slight flow of gas through the manifold 3 3 57 58 59 60 61 62 63 64 Verify that the red light illuminates and the yellow light on the secondary bank changes to green when the manifold changes over from service to secondary supply S l o w l y open one cylinder valve on the depleted bank of cylinders Observe the cabinet system status indicators Verify that the green and yellow indicators are lit and the red indicators are off Close the cylinder valve on the service bank of cylin ders Verify that the red light illuminates and the yellow light is extinguished when the manifold changes over from service to secondary supply Close the bleeder valve and test for leaks using a leak detect solution S I o w l y open all cylinder valves on the left and right banks of cylinders Reinstall the manifold section cover as explained in Section 4 B20353 ECN 13787 0701 Trouble Shooting SYMPTOM PRIMARY REGULATOR Venting at relief valve Gas leakage around primary valve body halves Pressure reg
51. ngeover Manifold FHM2 amp FHM2HL Series Repair Drawing Components amp Miscellaneous Hardware 35 34 36 36 WESTERN INNOYATOR SERVER READY PO R USE STEM NO RM READY FOR USE PLETED EPLETED LEFT BANK RGEHT BANK lt FHM 2 waw 36 4 36 KEY DESCRIPTION PART 34 Case WMC 2 59A 35 Outlet Union D 34 36 8 Sheet Metal Screw WMC 6 23 u Case Wiring Harness WMS 13 51 Switch Wiring Harness WMS 1 13 Power Supply Box WMS 13 23 Manifold PCB WME 8 98 Item Not Pictured 5 6 B20353 ECN 13787 0701 Western Enterprises Repair Drawing Automatic Changeover Manifold FHM2 FHM2HL amp FHM2HP Series Left Regulator Components 5 TN lt gt KEY DESCRIPTION Nut Preset Adjusting Screw Regulator Bonnet Bonnet Bushing Bushing Retainer Pivot Bonnet Spring Washer Slip Ring Diaphragm Assembly Nozzle for FHM2 9 Series for all other models Large O Ring Seat Holder and Stem for FHM2 FHM2HL FHM2HP FHM2 9 Series Valve Spring for FHM2 9 Series for all other models PART WMC 6 90 RWS 3 3 RWS 2 3P RWC 3 12 RWC 3
52. ntinued Line amp Intermediate Regulator Kits RK 1100M Repair Kit for all line regulators VALVES AND VALVE REPAIR KITS WMS 1 65 CGA 320 Check Valve Bushing WMS 1 59 CGA 326 Check Valve Bushing WMS 1 62 CGA 346 Check Valve Bushing WMS 1 53 CGA 540 Check Valve Bushing WMS 1 54 CGA 580 Check Valve Bushing WMS 1 64 CGA 280 Check Valve Bushing WMV 2 16 Master Valve RK 1044 Repair Kit for Low Pressure Check Valve RK 1085 Repair Kit for WMV 2 16 PRESSURE SWITCHES WME 4 4 All Gases except Oxygen 4 46 For Oxygen Manifolds POWER SUPPLY REPLACEMENT PARTS WMS 13 23 Power Supply Assembly transformer PCB with dry contacts case and cable WME 8 85 Power Supply PCB for WMS 13 23 includes dry contact for remote alarms TRANSDUCERS 9 Inlet Transducer WME 9 2A Line Transducer for FHM2HP WME 9 3A Line Transducer for FHM2 amp FHM2HL WME 8 98A Manifold PCB for FHM2 WME 8 98B Manifold PCB for FHM2HL WME 8 98C Manifold PCB for FHM2HP SOLENOIDS 8423 Solenoid Valve for oxygen nitrogen and air systems 9422 ictus Solenoid Valve for CO N20 systems WMV 5 15 Solenoid Bypass
53. o the 1 4 NPT male pipe thread on the new gauge and reassemble the reverse order of the removal procedure 2 Make sure gauge face is properly oriented 3 Re assemble the case per the How to shut down the manifold and How to open the manifold sections 4 4 B20353 ECN 13787 0701 PRIMARY REGULATOR REPAIR NOTE Removal and Replacement procedures are to be followed only if the primary regulator assembly is to be dis carded All service may be performed to the primary regulator without removing it from the manifold as long as the regulator is properly supported Shutdown the manifold and open the manifold as explained in the How to open the manifold and How to shut down the manifold sections NOTE This item may be repaired replaced without shutting down the manifold completely To work on the manifold while it is still in service follow the steps outlined in How to deplete the secondary bank Removal 1 2 Mark the compression fittings per the instructions on page 4 2 Using an 11 16 open end wrench disconnect the outlet tubing and relief tubing from the regulator at the compression fitting joints Using two 1 1 8 hex wrenches disconnect the regulator from the inlet block at the CGA union connection Disassembly 1 Remove the nut from the regulator by turning it counterclockwise using a 3 4 hex wrench 2 Using a flat blade screwdriver turn the adjusting screw c
54. ompensating spring The boss on the retainer will enter the internal diameter of the spring Grasp the flats of the nozzle with one hand and carefully guide the seat nozzle assembly into the body of the regula tor until the threads are engaged Rotate the nozzle clockwise and hand tighten Using the 13 16 hex socket and torque wrench tighten the nozzle to approximately 5 ft Ibs torque Lubricate the outer regulator body to diaphragm sealing surface of the regulator body with small amount of water Do not allow water to enter the low pressure chamber of the regulator Hold the bonnet upside down and place the pivot and bonnet spring in the bore provided The small diameter of the pivot should enter the internal diameter of the spring Place the washer in the large bonnet cavity beveled side up Lay the slip ring on top of the washer Insert the diaphragm sub assembly in the bonnet cavity The side marked UP should be against the slip ring Carefully place the bonnet on the regulator body Rotate the bonnet clockwise and tighten to 85 95 ft Ibs torque Replacement 1 2 Connect the inlet of the regulator to the CGA bushing located on the inlet block handtight Connect the compression fitting to the primary regulator finger tight Tighten the CGA connection on the regulator inlet using two 1 1 8 wrenches Using an 11 16 open end wrench connect the outlet and relief tubing to the 3 8 tube compression fittings When retig
55. oove Place the conical spring large end first into the backcap cavity Carefully line up the spring small end so that it slides over the wrench flats on the seat stem assembly and screw the backcap into position Tighten with a 1 1 2 hex wrench Line up the diaphragm holes with the screw holes in the body Set the bonnet spring in the retainer on the diaphragm assembly 4 12 B20353 ECN 13787 0701 8 Setthe pivot on top of the spring pointed end down 9 the body 10 a crisscross manner 11 Remove the regulator from the vice Replacement Set the bonnet carefully over the spring and pivot and line up the screw holes in the bonnet with the screw holes in Insert the screws in the screw holes and tighten by hand Use a phillips head screwdriver and tighten the screws in 1 Install the regulator in the manifold following the removal procedure in reverse order 2 Leak test all of the line regulator connections and the connections on the check valve Locknut ocknu Screw Bonnet xd Bonnet Spring Diaphragm Spring Assembly Retainer Bonnet a Screw Body i JE Stainless Steel Rod ERE Stem IIIIIIIIII i VA WI Conical 2 NOI Spring 555 UO Gasket Be V Seat Stem Assembly Ee FG 2250 0 S NS Backcap S
56. ounterclockwise until it turns freely and all compression is removed from the bonnet spring 3 Using a 1 3 8 hex wrench rotate the bonnet counterclockwise and remove it along with the pivot bonnet spring washer slip ring and diaphragm sub assembly 4 Using a 13 16 hex socket wrench rotate the nozzle counterclockwise and remove it along with the seat holder and stem compensating spring and the spring retainer 5 Clean all interior surfaces of the regulator body with isopropyl alcohol or oxygen compatible media 6 Blow out the regulator body and ports with oil free Air or Nitrogen to remove all foreign materials and dry all surfaces CAUTION Do not stand directly in front of the body or ports when performing the next step Eye protection should be worn to protect the service technician Chips of debris may be propelled into unprotected eyes 4 5 B20353 ECN 13787 0701 Reassembly 1 Apply a thin coating of Krytox lubricant or oxygen compatible equivalent to the o rings NOTE See section 5 for a picture showing the proper assembly of the regulator 10 11 12 13 14 Assemble small o rings with the spring retainer Push the smaller o ring to the bottom of the bore it rests in Assemble the large o ring with the nozzle Insert the new seat holder and stem into the nozzle Place the spring filter and Teflon amp gasket over the seat holder and stem Place the spring retainer on the c
57. p Pull the spring from the valve body Using a small needle nose pliers or tweezers grasp the valve poppet and remove it from the valve body Clean the interior of the valve body with isopropyl alcohol or oxygen compatible media CAUTION Donot stand directly in front of the valve when performing the next step Eye protection should be worn to protect the service technician Chips and or debris may be propelled into unprotected eyes Blow out the check valve body with oil free Air or Nitrogen to remove all foreign material and dry all surfaces 4 8 B20353 ECN 13787 0701 Reassembly 1 Insert a new valve poppet into the valve body 2 Insert the spring into the valve body 3 Position the new seal washer in the groove of the valve body 4 Place the valve cap over the spring and push the cap towards the body until the threads engage Rotate the cap clockwise and tighten to 35 ft lbs torque Replacement 1 Position the check valve and tube assembly in the control section with the check valve flow arrow pointing towards the back of the manifold 2 Connect the compression fittings to the solenoid valve and intermediate block using an 11 16 open end wrench and tighten to effect a gastight seal When retightening the compression fitting follow the procedure outlined on page 4 2 SOLENOID VALVE REPAIR Refer to Figure 4 8 CAUTION e Solenoid valve may be hot when energized Disassembly 1 Shutdown t
58. pen the master valves located on the cylinder header prior to pressurizing the manifold 4 S l o w l y open one cylinder valve on the left bank of cylinders 5 S l o w l y open cylinder valve on the right bank of cylinders 6 Using a leak detect solution verify that there no leaks present at the connections 7 Close the cylinder valves on the left and right banks of cylinders 8 Open the bleeder valve to create a slight gas flow through the manifold Vent the system until all gas has been removed from the manifold 9 Close the bleeder valve 10 S I o w I y open one cylinder valve on the left bank of cylinders 12 13 14 15 16 17 18 19 20 3 1 Create a slight flow of gas through the bleeder valve The left bank intermediate gauge should settle and remain constant Turn off the flow of gas through the manifold Verify that the intermediate gauge indicated the pres sure as shown in the specification chart in Section 1 for the primary regulator Observe the test gauge for two minutes Verify that the primary regulator does not exhibit creep and or increase in pressure Verify that the left side cylinder contents gauge indi cates a minimum of 2000 psig for Oxygen Nitrogen Air or gas mixtures Nitrous Oxide and Carbon Diox ide systems should indicate a minimum of 750 psig Adjust to the proper line pressure if necessary Verify the line pressure gauges is indic
59. s Check Valve 20 Right Inlet Block 21 Solenoid Valves 22 Heater Unit Note Carbon Dioxide an Nitrous Oxide units ordered without a heater do not include item 22 FIGURE 2 3 Internal Components FHM2HL 2 3 B20353 ECN 13787 0701 Line Pressure Transducer Line Pressure Gauge Line Relief Valve Ball Valve AA Ball Valve Line Regulator Line DESEE EN Check Valve Pressure Switch Check Valve Solenoid Valve Solenoid Valve Bypass Solenoid Check Valve Bypass Solenoid Check Valve Intermediate Pressure Gauge Intermediate Pressure Gauge Intermediate Relief Valv Intermediate Relief Valve Left Primary Regulator Right Primary Regulator Pressure Transducer 7 Pressure Transducer FIGURE 2 4 Piping Schematic FHM2 amp FHM2HP Line Pressure Transducer Bleeder Valve Pad Line Relief Valve mr ni Line Pressure Gauge 2 EI Ball Valve v Line Regulator 4 Line Regulator Pressure Switch Check Valve Check Valve Y Solenoid Valve Bypass Solenoid 41 Check Valve Intermediate Pressure Gauge Solenoid Valve Bypass Solenoid Check Valve Intermediate Pressure Gauge Intermediate Relief Valve N Intermediate Relief Valve
60. ssembly 1 2 Place the regulator in a vise or similar holding fixture Using an 11 16 open end wrench loosen the locknut on the regulator adjusting screw and back off the adjusting screw until it turns freely and all compression is removed from the bonnet spring Using a 1 1 2 hex wrench remove the backcap and conical spring from the regulator Remove the gasket from the backcap and discard Use a phillips head screwdriver to remove the six screws attaching the bonnet to the body Lift the bonnet off of the body and set aside the bonnet pivot bonnet spring and screws The diaphragm assembly and the seat stem assembly are attached at each end of the stainless steel rod The stainless steel rod is threaded on both ends Using a 5 8 hex wrench to stabilize the diaphragm assembly reach under the regulator with a 1 4 open end wrench placing it over the wrench flats provided on the bottom of the seat assembly and loosen the seat assembly The seat can be unscrewed by hand after loosening Remove and discard the diaphragm and seat assemblies Reassembly 1 2 Set the new diaphragm assembly on the body with the spring retainer facing up Insert the new stem seat assembly through the backup port and screw into the diaphragm assembly by hand Stabilize the diaphragm assembly using one hand and snug up the seat stem assembly with the other hand using a 1 4 open wrench Do not over tighten Place the new gasket in the backcap gr
61. t 522046 FIGURE 2 14 Line Regulator PRESSURE TRANSDUCER The pressure transducers vary their outlet voltage depending on the pressure being supplied The voltage output is monitored by the manifold PCB The voltage is converted to a pressure reading which is displayed on the PCB The line pressure transducer is used only to display the delivery pressure of the manifold The bank pressure transduc ers display inlet pressures opens and closes the solenoid valves and signals when changeover has occurred 2 9 B20353 ECN 13787 0701 This page intentionally left blank 2 10 B20353 ECN 13787 0701 FIELD TESTING amp TROUBLE SHOOTING SECTION 3 The manifold performance tests are used to verify the manifold functional performance When used in conjunction with the troubleshooting charts the technician can verify proper performance or rapidly identify the probable source of the problem NOTE components e All testing should be done using full cylinders Using partially full cylinders may result in improperly set PERFORMANCE VERIFICATION PROCEDURE 1 Open the manifold as explained in Section 4 2 Connect the electrical power source to the manifold and verify that the 2 red 2 yellow and 2 green lights are on and the 3 pressure displays are illuminated The manifold will go through a start up sequence that lasts about 15 seconds when power is supplied 3 O
62. te Martens edet a 5 2 Printed Board a 5 2 fonte M P 5 2 Components and Miscellaneous Hardware FHM2 8 FHM2HP Series 5 3 Components and Miscellaneous Hardware FHM2HL 5 5 Left Primary Regulator 5 7 Right Primary Regulator 5 8 Check Valve Components vi x iier 5 9 Power Supply 2 5 10 B20353 ECN 13787 0701 This page intentionally left blank B20353 ECN 13787 0701 SECTION 1 INTRODUCTION amp GENERAL INFORMATION PRODUCT DESCRIPTION The fully automatic changeover manifold is designed to provide a reliable uninterrupted supply of gas to a hospital or clinic s medical gas pipeline system It is designed to meet NFPA 99 type 1 facility requirements The manifold has an equal number of cylinders in its Service supply and Secondary supply banks automatically switching to the Secondary supply when the Service supply becomes depleted When the manifold changes to Secondary supply it sends a signal to the hospital or clinic s medical gas alarm system alerting the personnel of the need for the exhausted bank of cylinders to be rep
63. the adjusting screw backed away from the spring is sealed in the high pressure chamber of the regulator by the seat and nozzle As the adjusting screw is turned in it compresses the spring and puts a downward force on the diaphragm sub assembly When the diaphragm is forced down by the spring it pushes on the stem of the seat assembly The seat is pushed away from the nozzle and gas can then flow from the high pressure chamber to the low pressure chamber When the low pressure chamber fills with gas the gas will push upward against the diaphragm sub assembly As the pressure continues to build in the low pressure chamber more upward force will be exerted against the diaphragm and the diaphragm will push up against the bonnet spring compressing the bonnet spring As the diaphragm is gradually raised by the gas pressure the seat and nozzle gradually come closer together filling the low pressure chamber slowly and eventually the upward pressure exerted by the gas will be slightly greater than the down ward pressure of the bonnet spring and the seat nozzle will close As gas is released from the low pressure chamber a proportional amount of gas will be let into the low pressure area from the high pressure chamber As the adjusting screw is turned in farther and the bonnet spring compressed the gas pressure required to lift the diaphragm increases result ing in a higher delivery pressure from the outlet port of the regulator 524 96594 220 lt l
64. the manifold and How to shut down the mani fold sections 2 Label the three wires attached to the switch Loosen the slot head screws on the pressure switch using a flat blade screwdriver and remove the wires 3 Using an open end wrench remove the pressure switch from the intermediate block CAUTION The alarm will trigger upon disconnecting the wires Replacement 1 Apply Teflon tape to the male threads making sure not to cover the first thread 2 Using an open end wrench install the pressure switch on the intermediate block and tighten to effect a gastight seal 3 Complete the adjustment instructions below prior to installing the signal wires to the pressure switch Pressure Switch Adjustment 1 Mark and disconnect the three wires from the pressure switch 2 Connect an ohmmeter to the normally closed and common electrical contacts on the switch The ohmmeter should register zero resistance 3 Begin pressurizing the service bank manifold by opening one cylinder valve on the service side of the manifold At the actuation pressure the ohmmeter reading will jump from zero resistance to infinite resistance 4 Close the cylinder valve 5 Open the bleeder valve slightly to relieve pressure from the manifold while observing the test gauge and ohmmeter to determine switch setting At actuation pressure the ohmmeter reading should drop from infinite resistance to zero resistance 4 7 B20353 ECN 13787 07
65. ulator body and bonnet LINE PRESSURE REGULATOR Gas leakage around regulator body bonnet PROBABLE CAUSE Over pressure due to creeping or faulty regulation of primary regulator Loose bonnet Diaphragm leak Loose bonnet REMEDY OR CHECK Replace regulator seat and nozzle components Tighten bonnet Replace diaphragm Tighten bonnet Pipeline not at desired pressure Required gas flow not available SOLENOID VALVES Gas leakage through a close solenoid Solenoid not actuating properly not clicking during power up v4 0 x and up Line regulator not set correctly Line regulator not set correctly Flow capacity too high Solenoid faulty Power not reaching the solenoid Power not reaching the solenoid PCB not driving solenoid PCB configured for HGM2 Solenoid faulty 3 4 Set delivery pressure per specifications Set delivery pressure per specifications Reduce flow capacity Replace solenoid Check all wiring connections Check all wiring connections Component failure on PCB Replace PCB Check DIP switch settings Replace solenoid B20353 ECN 13787 0701 SYMPTOM Electrical System No indicator lights or displays on front panel come on when power is hooked up PROBABLE CAUSE Power Input REMEDY OR CHECK Check electrical power supply Red indicator light s on but both banks are full Red indicator light does not come on
66. ver be performed near nitrous oxide piping Excessive heat may cause the gas to dissociate creating an explosive force ABBREVIATIONS C Common NFPA National Fire Protection Association CGA Compressed Gas Association OSHA Occupational Safety amp Health Administration FT LBS Foot Pounds PSIG Pounds per Square Inch Gauge IN LBS Inch Pounds SCFH Standard Cubic Feet per Hour N C Normally Closed VAC Voltage Alternating Current N O Normally Open VDC Voltage Direct Current NPT National Pipe Taper PCB Printed Circuit Board Western Enterprises shall not be liable for errors contained herein or incidental or consequential damages in connection with providing this manual or the use of material in this manual B20353 ECN 13787 0701 SECTION 1 TABLE OF CONTENTS INTRODUCTION 1 1 Product Description cantine e u e t dde E Gal 1 1 Installation Information teet ote ER die erede aee ede ec dedo ase sete dent teneo dag 1 1 Manifold Specifica OTS ete dele tdg tert eiii ex P ade de 1 2 Adjustment 1 3 Recommended Tools and Test 200 0 000 1 4 SECTION 2 THEORY OF OPERATION 2 1 General Information i ote aaa 2 1 Manifold Operation ia 2 1 Primary Regulator Sia idit better elati Ud ar bae

Download Pdf Manuals

Related Search

Related Contents

EPC-12 Configuration Software User Manual  Peltor™ DECT-Com II™  DEXTER AXLE  取扱説明書 - yodobashi.com  Memory Troubleshooting Facts Memory Troubleshooting Facts  6 - SEW Eurodrive  SISTEMA DVD CINE EN CASA  CubeSuite+ V1.00.00 Integrated Development Environment User`s  Teledex AC9205S Cordless Telephone User Manual  User Manual T28s, German  

Copyright © All rights reserved. Failed to retrieve file