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AGM2 Service Manual - Western Enterprises

1. ui SLM MEE 2 7 PIOSSHEOCOWIEICIIGS zs Du a LE 2 8 Intermediate Regulator 2 9 Line Press re Begulator 5 sanere enn 2 9 SECTION 3 FIELD TESTING AND TROUBLE SHOOTING 3 1 Performance Verification Procedure 3 1 55 uu 3 4 SECTION 4 SERVICE PROCEDURES 4 1 2 4 1 Safety Precautions c oie er mr 4 1 Cleaning Lubrication and 4 2 GeneraliRepalr Procedures orc E REPE e er evi ee 4 3 Howto Open the Manifolds gu EHE PER ER EE 4 3 Manitold Cabinet Cover Remova uuu u re err EO Ha Eve 4 3 How to Deplete the Secondary Bank 4 4 How to Shut Down the Mantold AAA 4 4 Gauge eet E 4 4 4 5 Pressure Switch Replacement eene nennen nena 4 7 Check Valve Repair 4 8 Check Valve Repair Primary 4 9 Four Way Valve Replacement mer REEL venti oi 4 10 Intermediate Pressure Regulator 2 4 11 Line Regulator Heger ge ORE en ED 4 13 20454 REL 0000 0503 SECTION 5 MAINTENANCE AND REPAIR PARTS 5 1
2. 2 4 20454 REL 0000 0503 MANIFOLD 115 SUPPLY BOX DUAL LIGHT B BULB RED LENS e 3i ms 1 115 24 A BULB ER GREEN LENS TRANSFORMER J J 2d BROWN WHITE CIRCUIT BOARD RED rs 9 N C 01 1 MANIFOLD Ji C 1 l LEFT PRESSURE SWITCH RIGHT PRESSURE SWTCH 124 vac A N O N O REMOTE ALARM INTERFACING TERNINAL STRIP LOCATED ON RICHT SIDE OF THE PCH IN THE POWER SUPPLY BOX 24 VAC POWER SUPPLY N C RELAY PROVIDES DRY 5 AT POSITIONS 5 6 AND 7 NOTE PRESSURE SWTCHES AND RELAY REFLECTS UNPRESSURIZED MANIFOLD FIGURE 2 6 Electrical Schematic less heater The gas from the Primary supply is routed through the four way valve outlet on the back of the four way valve to the intermediate block assembly The intermediate block has 5 ports all connected to the same chamber The gas pressure at all 5 ports is the same as the pressure at the inlet to the block Gas enters the intermediate block from the Primary supply through the tubing connected at the right side The left port is connected via tubing with check valve from the in termediate regulator The top port connects to the inlet of the dual line assembly Attached to the cen
3. Right Line Regulator for AGM2HP Air CO N2O RK 1160 Repair Kit for WLR 13 200R L RK 1161 Repair Kit for WLR 13 60R L 2 Series Intermediate Regulators WLR 15 125 Intermediate Regulator for AGM2 amp AGM2HL Air He N2O O gt WLR 15 225 Intermediate Regulator for AGM2HP Air He CO N5O O gt RK 1160 Repair Kit for WLR 15 125 and WLR 15 225 RELIEF VALVES WMV 4C 75 AGM2 amp AGM2HL Line Relief Valve WMV 4C 250 AGM2HP Line Relief Valve WMV 4C 300 2 amp AGM2HL Intermediate Relief Valve WMV 4C 450 AGM2HP Intermediate Relief Valve 4 7 Pipe Away Adaptor 5 2 B20454 REL 0000 0503 Western Enterprises Repair Drawing Automatic Changeover Manifold AGM2 amp AGM2HP Series Components amp Miscellaneous Hardware Not Shown KEY DESCRIPTION 1 Outlet Nut Outlet Nipple Intermediate Regulator 4 way to Intermediate Tube CV Assembly Relief Tubing Left Prim Reg Four Way Valve Assembly Pressure Switch Joo OP PART D 7 D 20 See Page 5 2 WMS 13 58 WMS 13 48 WMS 13 54 WMS 13 53 AGM2 amp AGM2HP other gases WMS 13 66 2 9 amp AGM2HP O2 air 9 Left Primary Regulator 10 Right Primary Regulator 11 Left Inlet Block 12 Right Inlet Block 13 Left Primary to 4 way Tube 14 Right
4. V Vent Pressure Line Regulator Ball Valves Lr z 3 Check Valve Intermediate Pressure Gauge Intermediate Regulator Four Way Valve Intermediate Relief Valve Intermediate Relief Valve Pressure Switch Pressure Switch Check Valve Left Bank Pressure Gauge laci Right Bank Pressure Gauge E do Left Bank Header 4 Right Bank Header L 222277 Right Primary Regulator Regulator Figure 2 4 AGM2 AND AGM2HP SERIES MANIFOLD PIPING SCHEMATIC To Pipeline Distribution System Line Relief Valve 1 y Bleeder Valve Line Pressure Gauge Line Pressure Intermediate D Pressure Y Line Regulator A I Line Regulator Valves Pressure jw J x gt lt gt lt Check Valve Intermediate Pressure Gauge Four Way Valve be Intermediate Relief Valve Intermediate Regulator lt H Pressure Switch Check Valve 2 Right Bank Pressure Gauge Left Bank Pressure Gauge N 4 Intermediate Relief Valve Pressure Switch Te Check Valve Left Bank Header Right Bank Header Left Primary Regulator Right Primary Regulator FIGURE 2 5 AGM2HL SERIES MANIFOLD PIPING SSCHEMATIC
5. 40 41 42 43 45 46 47 48 49 50 51 Rotate the control knob counterclockwise to make the left bank the Primary supply Close the cylinder valve on the left bank of cylinders Observe the cylinder contents gauges the left bank gauge pressure should begin to drop the right cylin der bank pressure should remain constant Observe the intermediate gauge as the left side pres sure continues to drop As the cylinder pressure drops on the left side the intermediate area also loses pressure Verify that the pressure falls to the set point of the intermediate regulator see the speci fication chart in Section 1 S I o w I y open one cylinder valve on the left bank of cylinders Verify that the intermediate gauge has returned to the set pressure of the left primary regulator Close the bleeder valve Both banks remain under cylinder pressure Disconnect the case wiring harness from the fail safe wiring harness The three leads for both harnesses are joined together with flat blade connectors Connect an ohmmeter across the black and brown wires of the fail safe wiring harness The ends are female flat blade connectors The ohmmeter nor mally reads approximately zero 0 ohms resistance If the ohmmeter does not indicate approximately zero 0 ohms then one or both switches are faulty Con nect the meter across the normally open N O and common C terminal on each pressure sw
6. 2 Remove the nut from the primary regulator 3 Reinstall the control knob on the four way valve in the same orientation as it was prior to removal Rotate the knob to select the side the regulator is to be adjusted is on 4 the bank is not pressurized s l o w l y open the cylinders on the side of the regulator to be adjusted 5 Verify the cylinder pressure readout indicates a minimum pressure of 2000 psig on Oxygen Air and Nitrogen systems or a minimum of 700 psig on Nitrous Oxide and Carbon Dioxide systems 6 Create a slight flow of gas by cracking open the bleeder valve 7 Using a flat blade screwdriver turn the adjusting screw of the regulator while observing the intermediate 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 8 Close the bleeder valve The test gauge will go up slightly higher than the flowing adjusted pressure 9 Verify that the regulator does not creep by observing the intermediate gauge for two minutes The gauge must indicate the same pressure at the end of the two minute period 10 Install and tighten the nut on the primary regulator Use the flat blade screwdriver to keep the adjusting screw from turning while nut is tightened on the regulator PRESSURE SWITCH REPLACEMENT Removal 1 Open and shutdown the
7. 3 Remove the bonnet by holding the body hex with a wrench to stabilize the assembly and using another wrench to loosen the bonnet The adjusting spring vibration dampener and pivot will come off with the bonnet 4 Remove the diaphragm assembly and slip ring 5 Using a 1 socket wrench rotate the seat capsule counterclockwise and remove the seat capsule CAUTION Do not stand directly in front of the body and ports 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 6 Blow out the regulator body and ports with oil free Air or Nitrogen to remove all foreign materials and dry all surfaces Re assembly 1 2 3 Assemble the new seat capsule into the regulator body and torque to 20 25 ft Ibs Place the pivot on the bonnet spring and insert inside the inverted regulator bonnet Insert the vibration dampener between the spring and the bonnet Assemble the slip ring and diaphragm into the bonnet diaphragm should be on top of the stack and end up against the regulator body Assemble the bonnet to the regulator while the regulator is inverted and torque to 40 50 ft lbs 4 11 B20454 REL 0000 0503 Replacement 1 Position the intermediate regulator in the control section and attach the union fitting to the back of the four way valve finger tight 2 Connect the compression nut from the check valve assembly to the intermediate
8. Primary to 4 way Tube 15 Relief Tubing Right Prim Reg 16 Left Line Regulator Assembly AGM2 AGM2HP WMS 13 67 See Page 5 2 See Page 5 2 WMS 13 4 WMS 13 3 WMS 13 56 WMS 13 57 WMS 13 55 WLR 13 60L WLR 13 200L KEY DESCRIPTION 17 18 19 20 Right Line Regulator Assembly AGM2 AGM2HP Intermediate Gauge Line Pressure Gauge 2 AGM2HP AGM2HL Inlet Pressure Gauge AGM2 CO2 amp N20 AGM2 amp AGM2HP other gases Inlet Union Ball Valve Ball Valve O Ring Relief Union Relief Tubing Line Regulator Backplate Assembly Bleeder Valve Relief Block Assembly AGM2 AGM2HP PART t WLR 13 60R WLR 13 200R WMG 3 4 WMG 3 3 WMG 3 4 WMG 3 8 WMG 3 12 WMS 1 40 WMV 5 12 RO 016E WLF 3 12 WMS 13 60 WMS 13 61 203 WMS 13 49 WMS 13 50 5 3 B20454 REL 0000 0503 Western Enterprises Repair Drawing Automatic Changeover Manifold AGM2 amp AGM2HP Series Components amp Miscellaneous Hardware d KEY DESCRIPTION PA _ s 70250 LINE PRESSURE 30 WESTERN INNOVATOR AGM2 28 E u elt 2 i 30 31 PART Case WMC 2 70A Outlet Union D 34 8 Sht Metal Case Screw WMC 6 23 Control Knob WMV 5 3A Lens Cover MGL 71 1 Case Wiring Harness WMS 13 62 Switch Wiring Harness WMS 13 63 Power Supply Box 8570D Item not pictured 5 4 B20454 REL 0000 050
9. The heater operates at 115 VAC and draws four amperes Piping Connections Header Inlets Carbon Dioxide CGA 320 Relief Valve Nitrous Oxide CGA 326 Outlet Delivery Pipeline Breathing Air CGA 346 Oxygen CGA 540 Helium CGA 580 Nitrogen CGA 580 Manifold 115 Control Manifold Outlet 1 2 male pipe thread located VAC Cabinet on the top center of the cabinet Conduit Relief Valve 1 2 male pipe thread located on the top left side of the cabinet CR FIGURE 1 2 Connection Locations 1 2 20454 REL 0000 0503 ADJUSTMENT SPECIFICATIONS Primary Intermediate Pressure Intermediate Line Line Regulator Pressure Switch Regulator Regulators Pressure Relief Valve Relief Valve 195 205 135 140 120 125 50 55 295 305 235 240 220 225 160 165 AGM2HL 235 245 135 140 120 125 50 55 Units above are PSIG All testing must be done with full cylinders Primary regulator set pressure will vary with inlet pressures CAUTION e Resetting adjusting manifold components with cylinders that are not full may cause the manifold to function improperly 1 3 B20454 REL 0000 0503 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 th
10. back of the four way valve to the intermediate block and the bottom port on the back of the four way valve through an intermediate regulator and check valve before it also goes to the intermediate block When the valve knob is rotated counterclockwise to the left position the four way valve connects the left primary regulator directly to the intermediate block through the top rear port on the four way valve This direct connection makes the left bank the primary supply In this position the valve also connects the right primary regulator to the inter mediate regulator and check valve through the bottom port on the four way valve This route through the intermediate regulator defines the right bank as the secondary supply Rotating the four way valve clockwise to the right position now channels the gas from the right primary regulator directly to the intermediate block and gas from the left primary regulator through the intermediate regulator and check valve This reverses the service of the cylinder banks by making the right bank primary and the left bank secondary The turn of the four way valve allows the operator to select which bank is the primary supply and secondary supply 2 1 B20454 REL 0000 0503 LEGEND 1 Outlet Block with D size Adaptor 2 Line Pressure Gauge 3 Ball Valves 4 Line Regulators 5 Intermediate Relief Valve 6 High Pressure Check Valve 7 Four way Valve 8 Pressure Switch 9 Interm
11. high a delivery pressure Total draw from equipment on manifold is too high Loose bonnet REMEDY OR CHECK Replace regulator seat and nozzle components Tighten bonnet Replace diaphragm Tighten screws Replace valve Replace valve Replace valve Tighten bonnet Adjust intermediate regulator per specifications Adjust intermediate regulator per specifications Reduce the amount of equipment so total draw matches manifold flow capacity Tighten bonnet Pipeline not at desired pressure Required gas flow not available Line regulator not set correctly Line regulator not set correctly Total draw from equipment on manifold is too high 8 4 Set delivery pressure per specifications Set delivery pressure per specifications Reduce the amount of equipment so total draw matches manifold flow capacity B20454 REL 0000 0503 Trouble Shooting SYMPTOM ELECTRICAL SYSTEM No indicator lights on front panel come on when power is hooked up Red indicator light does not come on when one bank is empty and changeover occurs Green indicator light does not come on even though both banks are full Red indicator light stays on With both banks full PROBABLE CAUSE No power to unit Change over occurring at too high pressure One or both pressure switches may be set to low a pressure Master valve or cylinder valves on bank are closed All pigtails on
12. of cylinders Complete steps 13 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 This valve stays open for the duration of this test through step 43 Verify that the line pressure regulator maintains a constant pressure by observing the line pressure gauge S I 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 the cylinder contents gauges the right cylinder bank pressure should begin to drop the left cylinder bank reading should remain constant Observe the 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 the set point of the Intermediate regulator see the 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 right primary regulator 3 2 38 39
13. of cylinders is the bank and the left bank is the Secondary Inlet from Inlet from Right Primary Intermediate Left Primary CYL 1 Regulator CYL 2 EXH FIGURE 2 10 Four Way Valve Back View 2 7 B20454 REL 0000 0503 Dutlet to intermediate Outlet to intermediate Outlet to intermediate Block PRESS Block PRESS Block PRESS Inlet from Outlet to Inlet from rom Outlet to Inlet from Inlet from Outlet to Inlet from Right Primary Intermediate Left Primary Primary Intermediate Left Pr mary Right Primary Intermediate Left Primary CYL 1 Regulator CYL 2 Regulator CYL 2 CYL 1 Regulator CYL 2 EXH FIGURE FIGURE FIGUR FIGURE 2 11 Four Way Valve Back View Gas is directed from inlet CYL 1 to outlet PRESS and from inlet CYL 2 to outlet EXIT only The seals in the valve prevent gas from traveling to the other ports With the valve in the full right position the gas from the right primary regu lator is routed to the intermediate block and the gas from the left primary regulator is routed to the intermediate regulator Figure 2 11b shows the valve in the OFF position The OFF position is only used during shipment of the manifold Notice that the internal porting of the valve shown
14. of the regulator body with a 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 outlet and relief tube compression fittings to the primary regulator finger tight Connect the pressure switch to the tee on the primary regulator finger tight Tighten the CGA connection on the regulator inlet using two 1 1 8 wrenches Using 11 16 open end wrench tighten the 3 8 outlet and relief tube compression fittings When retighting the compression fittings follow the procedure outlined on page 4 2 Using 11 16 and 5 8 open end wrenches tighten pressure switch B size swivel nut to regulator tee 4 6 B20454 REL 0000 0503 Adjustment 1 not already done open the manifold by following the How to open the manifold as explained earlier in this section
15. psi Line gauge AGM2 AGM2HL WMG 34 400 psi Line gauge AGM2HP 3 4 400 psi Intermediate gauge WMG 3 8 2000psi Cylinder pressure gauge AGM2 4 AGM2 8 AGM2HL WMG 3 12 4000psi Cylinder pressure gauge AGM2 2 5 7 9 AGM2HP VALVES AND VALVE REPAIR KITS WMS 1 53 CGA 540 Check Valve Bushing WMS 1 59 CGA 326 Check Valve Bushing WMV 2 16 Master Valve WMS 1 62 CGA 346 Check Valve Bushing WMS 13 58 Four way valve assembly WMS 1 54 CGA 580 Check Valve Bushing 1085 Repair kit for WMV 2 16 WMS 1 65 CGA 320 Check Valve Bushing RK 1041 Repair kit for low pressure check valves PRESSURE SWITCHES 4 4 Pressure Switch all gases except amp Compressed Air WME 4 4C Pressure Switch Oxygen amp Compressed Air POWER SUPPLY REPLACEMENT PARTS 8570D Power Supply Assembly transformer PCB case cable WME 8 1 Power Supply PCB includes dry contacts for remote alarms 9103002 2 5 luse for line holder INDICATOR LAMP REPLACEMENT Square Style WMS 1 136 Dual indicator light assembly MK 1011 Replacement bulb kit 5 1 B20454 REL 0000 0503 MANIFOLD MAINTENANCE am
16. regulator fitting and tighten with 11 16 open end wrench to make gas tight seal 3 Tighten union connection between intermediate regulator and four way valve using 11 16 and 5 8 open end wrenches Adjustment 1 If not already done open the manifold as explained in the How to open the Manifold section Reinstall the four way valve knob and rotate to select one bank of cylinders as the supply bank 2 S o w l y open the cylinder valves on the secondary supply bank 3 Close the cylinder valves on the primary bank 4 Open the bleeder valve slightly to relieve pressure from the manifold while observing the intermediate gauge 5 Allow the gas to vent until the intermediate gauge stabilizes or indicates less than the setting for the intermediate regulator listed in the Adjustment Specification chart in Section 1 e If the gauge stabilizes at a pressure higher than the chart specification turn the adjusting screw on the intermediate regulator counterclockwise out to decrease the gauge reading e If the gauge stabilizes at a pressure lower than the chart specification turn the adjusting screw on the intermediate regulator clockwise in to increase the gauge reading 6 Close the bleeder valve 7 Pressurize the service bank 8 Simulate the changeover sequence from both sides and observe the intermediate gauge to verify proper setting 4 12 B20454 REL 0000 0503 LINE REGULATOR REPAIR NOTE Removal and Replaceme
17. that they may be properly reattached later 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 8 20454 REL 0000 0503 HOW DEPLETE THE SECONDARY BANK While primary bank remains operational 1 Open the manifold as explained in the How to open the manifold section 2 Rotate the knob to make the bank that is going to be serviced the secondary bank 3 Close the cylinder valves on the secondary bank 4 Mark the compression fitting at the outlet of the primary regulator per the instructions on page 4 2 5 Crack open the compression fitting and allow the reserve bank to deplete CAUTION e The compression fitting on the secondary bank primary regulator should be used to deplete pressure from the reserve bank This fitting will release gas at an intermediate pressure Use of another connection may release gas at high pressure 6 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 2 Open the manifold as explained in the How to open the manifold section WARNING p
18. 0 5 10 B20454 REL 0000 0503 Western Enterprises Repair Drawing Automatic Changeover Manifold AGM2 AGM2HL amp AGM2HP Series Right amp Left Line Regulator Components ss N 13 10 6 7 Note Right side regulator shown above with Fittings installed Open end of elbows part 14 pointed in opposite direction for left side regulator assembly KEY 1 O1 11 12 13 14 DESCRIPTION PART Regulator Body WLR 1 1 Seat Capsule WLR 1 10 Nut for AGM2 amp AGM2HL Only Not Shown WMC 6 90 Pivot RWC 2 8 Bonnet RWS 2 2P Bushing Retainer RWC 3 14 Bonnet Bushing RWC 3 12 Slip Ring 2 amp AGM2HL RWS 3 17 AGM2HP RWS 7 4 Diaphragm Assembly 2 amp AGM2HL RWS 3 16 AGM2HP RWS 3 28 Delivery Spring 2 amp AGM2HL WLR 1 31 AGM2HP RWS 1 12 Adjusting Screw 2 amp AGM2HL WLR 2 4 AGM2HP WLR 1 11 1 4 NPT Plug WLF 1 21 Anti Vibrator 2 amp AGM2HL WLR 1 14A AGM2HP WLR 1 14 1 4 Male Elbow BLM 4HP Part of Repair Kit RK 1161 AGM2 amp AMG2HL and RK 1160 AGM2HP 5 11 B20454 REL 0000 0503
19. 03 SECTION 1 INTRODUCTION amp GENERAL INFORMATION PRODUCT DESCRIPTION The 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 99 type 1 facility requirements The manifold has an equal number of cylinders in its Primary supply and Secondary supply banks automatically switching to the Secondary supply when the Primary 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 replaced with full cylinders After new cylinders are in place and turned on no manual resetting of the manifold is necessary except for turning the control knob 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 in an open location should be protected against weather conditions During winter pro
20. 1 2 5 Assemble the new seat capsule into the regulator body and torque to 20 25 ft Ibs Place the pivot on the bonnet spring and insert inside the inverted regulator bonnet Insert the vibration dampener between the spring and the bonnet Assemble the slip ring and diaphragm into the bonnet diaphragm should be on top of the stack and end up against the regulator body Assemble the bonnet to the regulator while the regulator is inverted and torque to 40 50 ft Ibs Replacement 1 Teflon tape and assemble the union fittings from the regulator that were removed into the new regulator 2 Insert the regulator into the dual line assembly 3 Using 1 and 1 1 4 open end wrenches tighten the union fittings 4 Open the ball valves supplying the new regulator and leak check the union connections 5 Close the ball valves isolating the other regulator for future service Adjustment 1 Open the manifold as described in the How to open the Manifold section 2 S l o w I y open the ball valves that were isolating the regulator 3 Close the ball valves isolating the regulator that is not being adjusted 4 Verify the cylinder pressure gauge indicates minimum pressure of 2000 psig on Oxygen Air and Nitrogen sys tems or a minimum of 700 psig on Nitrous Oxide and Carbon Dioxide systems 5 Open the bleeder valve to create a slight flow of gas through the manifold 6 Using a flat blade screwdriver turn the adjusting scre
21. 2HL Series Components amp Miscellaneous Hardware 30 33 d 31 UNE PRESSURE Se WESTERN INNOVATOR MANIFOLD SYSTEMS _AGM2 kk wt 29 ye LEFT BANK RIGHT BANK 32 33 KEY DESCRIPTION 29 Case 30 Outlet Union 31 8 Sht Metal Case Screw 32 Control Knob 33 Lens Cover Case Wiring Harness Switch Wiring Harness Power Supply Box PART t WMC 2 70A D 34 WMC 6 23 WMV 5 3A MGL 71 1 WMS 13 62 WMS 13 63 8570D Item not pictured 5 6 B20454 REL 0000 0503 Western Enterprises Repair Drawing Automatic Changeover Manifold AGM2 AGM2HL amp AGM2HP Series Left Regulator Components KEY DESCRIPTION NOOR 8 9 10 11 12 13 Nut Preset Adjusting Screw Regulator Bonnet Bonnet Bushing Bushing Retainer Pivot Bonnet Spring Washer Slip Ring Diaphragm Assembly Nozzle for AGM2 Models oxygen AGM2 Models other Gases Large O Ring Seat Holder amp Stem for AGM2 Models oxygen AGM2 Models other gases PART t WMC 6 90 RWS 3 3 RWS 2 3P RWC 3 12 RWC 3 14 RWC 2 8P RWS 1 12 RWS 3 26 RWS 3 17 RWS 3 28 RWS 5 1 RWS 6 9 RO 015E RWS 6 3 RWS 6 8
22. 3 Western Enterprises Repair Drawing Automatic Changeover Manifold AGM2HL Series Components amp Miscellaneous Hardware 4 KEY DESCRIPTION PART amp KEY DESGRIPTION PART amp 1 Outlet Nut D 7 17 Right Line Regulator Assembly WLR 13 60R 2 Outlet Nipple D 20 18 Intermediate Gauge WMG 3 4 3 Intermediate Regulator See 5 2 19 Line Pressure Gauge WMG 3 3 4 4 way to Intermediate Tube WMS 13 58 20 Inlet Pressure Gauge WMG 3 8 5 CV Assembly WMS 13 48 21 Inlet Union WMS 1 40 6 Relief Tubing Left Prim Reg WMS 13 54 22 Ball Valve WMV 5 12 7 Four Way Valve Assembly WMS 13 53 Ball Valve Ring RO 016E 8 Pressure Switch WMS13 66 23 Relief Union WLF 3 12 9 Left Primary Regulator See Page 5 2 24 Relief Tubing Line Regulator WMS 13 60 10 Right Primary Regulator See Page 52 25 Backplate Assembly WMS 13 61 11 Left Inlet Block WMS 13 33 26 Bleeder Valve 203 12 Right Inlet Block WMS 13 32 27 Relief Block Assembly WMS 13 49 13 Left Primary to 4 way Tube WMS 13 56 28 Heater WMS 13 37 14 Right Primary to 4 way Tube WMS 13 57 15 Relief Tubing Right Prim Reg WMS 13 55 16 Left Line Regulator Assembly WMS 13 60L Not Shown 5 5 B20454 REL 0000 0503 Western Enterprises Repair Drawing Automatic Changeover Manifold AGM
23. KEY DESGRIPTION 14 15 Valve Spring AGM2 Models oxygen AGM2 Models other gases Teflon Ring Filter Spring Retainer Regulator Body 90 CGA 022 Elbow NPT Street Tee 1 4 NPT Plug 90 Tube Elbow CGA 580 Nut CGA 580 CV Nipple O ring Back up Ring Seal Retainer Part of Repair Kit RK 1038 OXYGEN and RK 1037 other gases 5 7 B20454 REL 0000 0503 Western Enterprises Repair Drawing Automatic Changeover Manifold AGM2 AGM2HL amp AGM2HP Series Right Regulator Components 23 24 LO KEY DESCRIPTION NOOR GQ N 8 10 11 12 13 Nut Preset Adjusting Screw Regulator Bonnet Bonnet Bushing Bushing Retainer Pivot Bonnet Spring Washer Slip Ring Diaphragm Assembly Nozzle AGM2 Models oxygen 2 Models other gases Large O Ring Seat Holder amp Stem for 2 Models oxygen AGM2 Models other gases PART t WMC 6 90 RWS 3 3 RWS 2 3P RWC 3 12 RWC 3 14 2 8 RWS 1 12 RWS 3 26 RWS 3 17 RWS 3 28 RWS 5 1 RWS 6 9 RO 015E RWS 6 3 RWS 6 8 KEY DESCRIPTION 14 15 Valve Spring 2 Models oxygen AGM2 Models other gases O Ring Filter Spring Retainer Regulator Body 90 CGA022 Elbow NPT Street Tee 90 Tube Elbow 1 4 Plug CGA 580 Nut CGA 580 O ring Back Up Ring Seal Retainer Strai
24. Manifold header a Daily 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 b Monthly 1 Inspect valves for proper closure 2 Check cylinder pigtails for cleanliness flexibility wear leakage and thread damage Replace damaged pigtails immediately 3 Inspect pigtail check valves for closure ability C Every 2 years 1 Replace all copper pigtails d Every 4 years 1 Replace all stainless flex pigtails 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 pressurized causing death or serious injury 1 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 performed before exposing the parts to high pressure gas 2 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 3 Use only proper repair tools and parts Parts for Western manifolds are shown in this instruction Special tools are called out as needed 4 Before connecting the cylinder to the manifol
25. Q WESTERN AUTOMATIC CHANGEOVER MANIFOLD AGM2 AGM2HL amp AGM2HP SERIES SERVICE MANUAL LINE PRESSURE WESTERN KH D H O O O WESTERN ENTERPRISES PRINTED IN USA B20454 REL 0000 0503 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 AGM2 AGM2HL and AGM2HP 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 specifications is subject to change without notice WARRANTY Western Enterprises makes no warranty
26. RMEDIATE REGULATOR intermediate regulator controls the gas flow from the secondary bank of cylinders to the intermediate block termediate regulator pressure setting is the pressure at which the manifold will switchover from Primary to Secondary supply The intermediate regulator has an inlet port connected to the four way valve The outlet port of the intermediate regulator is connected via tubing to the intermediate block A check valve is located immediately upstream of the regula tor The regulator is comparable to the line regulator illustrated in Figure 2 14 The regulator seat is held shut by the gas pressure from the Primary bank regulator not allowing the check valve immediately downstream of the intermediate regulator to open The gas pressure from the intermediate regulator is pushing against the bottom of the check valve seat When both cylinder banks are full and the regulators properly adjusted the pressure on the downstream side of the valve is greater than the intermediate regulator pressure This pressure differential holds the valve closed Turning the adjusting screw of the intermediate regulator in clockwise will increase the intermediate regulator pressure thereby in creasing the pressure at which the valve will open Turning the adjusting screw out counterclockwise will decrease the intermediate regulator pressure thereby decreasing the pressure at which the valve will open As the gas in t
27. Replacement 5 1 Pressure Gauges cd e dala dla dla 5 1 Valves and Valve Repair 5 1 Pressure SWItCHOS c 5 1 Power Supply Replacement Parts AA 5 1 Indicator Lamp 2 1 0 5 1 Regulat rs and aa Oa 5 2 Heliet ValVes ee tener ero 5 2 SECTION 5 MAINTENANCE AND REPAIR PARTS Repair Drawing 5 3 Components and Miscellaneous Hardware AGM2 amp AGM2HP Series 5 3 Components and Miscellaneous Hardware AGM2HL 5 5 Left Primary Regulator Components 5 7 Right Primary Regulator Componente 5 8 o 5 9 Intermediate Regulator 5 10 Right amp Left Line Regulator Components 5 11 iv B20454 REL 0000 0503 This page intentionally left blank B20454 REL 0000 05
28. as solid fill does not connect any of the inlet ports of the valve with the outlet ports Figure 2 11c shows the flow channels within valve at the full left position to make the left bank of cylinders Primary the right bank Secondary The only function the four way valve serves is to route the gas to the other components of the manifold PRESSURE SWITCHES The pressure switches are used to signal Secondary in Use These Seen Adjusting Screw Pressure Port switches are piston type with one common contact one normally closed contact and one normally open m contact See Figures 2 12 and 2 13 d When the manifold is pressurized to normal pressures the piston in the switch is pushed up End View Side View The piston 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 depleted the piston moves down FIGURE 2 12 Low Pressure Switch releasing the force against the switch activator The contacts of the switch then return to the normally open and normally closed positions switches complete the electrical circuits to the indicator on the front of the control section and to the O remote alarm interface board in the power supply box FIGURE 2 13 Switch Schematic 2 8 20454 REL 0000 0503 INTE
29. atients requiring medical gas are being supplied from portable supplies e Do not shutdown the manifold until all personnel have been advised of the intended service and all Turn off right and left supply bank cylinder valves 3 4 Open the bleeder valve to vent residual gas from the system 5 Close the bleeder valve once all gas has depleted 6 Turn off power to manifold Alarms may sound 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 Cylinder bank pressure gauges may be replaced without shutting down the mani fold See How to deplete the secondary bank section 2 Using a 9 16 open end wrench remove the pressure gauge from the system Use second 3 4 wrench to keep attached fittings from rotating 3 Remove old sealant from the 1 4 NPT female pipe threads Replacement 1 Apply Teflon amp tape to the 1 4 NPT male pipe thread on the new gauge and reassemble in the reverse order of the removal procedure 2 Make sure gauge face is properly oriented through the opening in the door 3 Close manifold per the How to open the manifold section 4 4 B20454 REL 0000 0503 REGULATOR REPAIR NOTE e Removal and Replacement procedures are to be followed only if the primary regulator assembly is to be scrapped All service may be performed to the primary regula
30. banks are full the switches complete the electrical circuit to display the green system normal light Oylinder pressures for each bank are indicated on the gauges on the manifold front cover The Primary supply is indi cated by the position of the control knob The intermediate pressure is indicated by the gauge located on the intermediate block The line pressure is indicated by the gauge located on the outlet block As the gas from the Primary supply is depleted the gas pressure to the primary regulator will begin to fall Simultaneously the pressure to the pressure switch intermediate block and the line regulator also falls When the Primary side pressure falls below the set point of the bank pressure switch the red replace depleted cylinders light comes on and the green system normal light is extinguished Any remote alarms are activated at this time When the Primary pressure falls to the set point of the intermediate regulator the check valve between the regulator and the intermediate block is pushed open by pressure applied from the intermediate regulator The Secondary bank begins to supply the system After replacing empty cylinders and opening the cylinder valves the pressure switch will activate and extinguish the red replace depleted cylinders light and the green system normal light will come on The operator should then turn the con trol knob to the opposite cylinder bank This will make the partially used se
31. condary bank the Primary supply and the newly installed cylinders will become the Secondary supply 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 regulators function is to reduce the cylinder pressure of the supply banks to a more usable regulated pressure Adjusting Screw Low Pressure Chamber Seat and Nozzle High Pressure Chamber INLET PORT ENG OUTLET PORT FIGURE 2 8 Primary Regulator 26 20454 REL 0000 0503 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 regula
32. d momentarily open and close the cylinder valve to blow out any dirt or debris 5 After connecting the cylinder to the manifold open the cylinder valve s l o w l y to allow the heat of compression to dissipate 6 Useonly cleaning agents sealants and lubricants as specified in this instruction 4 1 B20454 REL 0000 0503 CLEANING LUBRICATION AND SEALING Clean metal parts of the manifold with isopropyl alcohol or oxygen compatible cleaner detergent or solvent prior to assembly Dry thoroughly Do not clean o rings with solvent Teflon 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 Approximately 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 NOTE e 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 Torque the nut with the wrench until the marks line up which indicates that the fitting has been tightened to its original position A noticeable increase in mechanical resis tance will be felt indicating the ferrule is being resprung into sealing position Th
33. e area from the outlet high pressure chamber As the adjusting screw is turned in farther and the bonnet spring is compressed the gas pressure required to lift the diaphragm increases resulting in a higher delivery pressure from the outlet port of the regulator Gas from Intermediate Gas from Primary Regulator Regulator CHECK VALVE FIGURE 2 9 Check Valve The check valve keeps gas from the primary regulator from flowing backward See Figure 2 9 Pressure from the primary regulator must drop below the pressure setting of the intermediate regulator Then gas enters the check valve from the intermediate regulator 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 FOUR WAY VALVE The four way valve assembly is used to route the gas from the primary regulators to either the intermediate block or the intermediate regulator four way valve has two inlet ports on the back side of the valve and two outlet ports located 180 apart on the sides of the valve See Figure 2 10 Figure 2 11a shows the flow channels within the valve O Outlet to Outlet to intermediate PRESS when the right bank
34. e valve body Place the valve cap over the spring and push the cap towards the body until the threads engage Rotate the cap clockwise and tighten securely Replacement 1 2 Position the check valve and tube assembly in the control section with the check valve flow arrow pointing towards the intermediate block Connect the compression fittings to the four way 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 CHECK VALVE REPLACEMENT PRIMARY REGULATOR 1 2 Remove the primary regulator from the manifold as described in the Primary Regulator Repair section Place the regulator in a vice or similar holding fixture Using an 11 16 open end wrench remove the check valve nipple from the regulator inlet port Remove any remaining pipe sealant from the regulator inlet port Teflon tape the threads on the replacement check valve nipple Nut must be replaced on the check valve nipple before it is assembled onto the regulator Using an 11 16 open end wrench tighten the check valve nipple into the regulator Install the regulator back in the manifold as described in the Primary regulator repair section 4 9 B20454 REL 0000 0503 FOUR WAY VALVE REPLACEMENT NOTE If valve comes with Fittings in place then skip 5 amp 6 in Removal section 1 thru 3 in the Replacement s
35. eater The thermostatically controlled heater warms the gas before entering the regulator preventing IS m freeze up and loss of pressure due to the extreme JO p 9 low temperatures generated when these gases rapidly expand LEFT BANK RIGHT BANK Header Check Valves Control Section Header Check Valves Gas then enters the inlet nipple on the primary regulator which has an integral check valve This check valve prevents gas from _ bank feeding out into the other bank HENNES EEA Components From the check valve nipple gas flows to the primary regulator Pressure is reduced 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 Each primary regulator has two ports on the low pressure side One port is connected to an inter mediate relief valve on the relief block assembly and pressure switch The other port is the outlet port and is con nected via tubing to the four way valve The gas then flows from the primary regulators to the four way valve Tubing connects the left primary regulator to the left port of the four way valve and the right primary regulator to the right port of the four way valve The four way valve assembly has three positions The center position is OFF The OFF position is only used during shipment of the mani fold Tubing connects the top port on the
36. ection Removal 1 Open and shutdown the manifold as explained in the How open the manifold and How to shut down the manifold sections 2 Mark the compression fittings per the instructions on page 4 2 Disconnect the three tubing assemblies at the com pression fittings to the four way valve and loosen the compression fittings at the other end of the tubing assemblies using an 11 16 open end wrench 3 Using 11 16 wrench to loosen and disconnect the union fitting on the bottom of the four way valve 4 Use a flat blade screwdriver to remove the two screws that secure the four way valve to the support bracket and remove the four way valve assembly 5 Secure the valve assembly in a vise or similar holding fixture and use a 5 8 open end wrench to remove the two inlet and two outlet adpators from the valve for use on the replacement valve 6 Remove the old sealant from the 1 4 male pipe threads on the compression fittings Replacement 1 Apply Teflon tape to the 1 4 male pipe threads on the compression fittings 2 Secure the new four way valve vise 3 Install the fittings in the same orientation as they were removed see sections 5 for the proper valve assembly configuration 4 Remove the valve from the vise and position it behind the support bracket with the CYL 2 port on the left and the CYL 1 port on the right 5 Reinstall the two screws through the bracket and into the two top thread
37. ed holes of the valve Tighten with a flat blade screwdriver 6 Reconnect the tubing to the new valve When retightening the compression fittings follow the procedure outlined on page 4 2 7 Reconnect the intermediate regulator to the bottom port of the new valve 8 Using the 11 16 open end wrench tighten the compression fitting at the ends of the tubing assemblies to effect gastight seal When retightening the compression fittings follow the procedure outlined on page 4 2 4 10 B20454 REL 0000 0503 INTERMEDIATE PRESSURE REGULATOR REPAIR Removal 1 Shutdown and open the manifold as explained in How to open the Manifold and How to shutdown 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 section Mark the compression fitting at the regulator outlet per the instructions on page 4 2 Disconnect the tubing at this compression fitting using an 11 16 open end wrench Disconnect the union fitting between the intermediate regulator and the four way valve Remove the intermediate regulator from the control section Disassembly 1 Remove the intermediate regulator following the instructions above 2 Rotate the adjusting screw of the regulator counter clockwise with a flat blade screwdriver and remove
38. ediate Check Valve 10 Left Inlet Block 11 Intermediate Regulator 12 Primary Regulator 13 Intermediate Test Gauge 14 Right Inlet Block 15 High Pressure Gauge 16 Relief Outlet Connection 17 Relief Block Connection Part of relief block assembly that includes relief valves 5 amp 19 18 Intermediate Block 19 Line Pressure Relief Valve FIGURE 2 2 Internal Components AGM2 amp AGM2HP 2 2 20454 REL 0000 0503 LEGEND 1 Outlet Block with D size Adaptor 2 Line Pressure Gauge 3 Ball Valves 4 Line Regulators 5 Intermediate Relief Valve 6 High Pressure Check Valve 7 Four way Valve 8 Pressure Switch 9 Intermediate Check Valve 10 Left Inlet Block 11 Intermediate Regulator 12 Primary Regulator 13 Intermediate Test Gauge 14 Right Inlet Block 15 High Pressure Gauge 16 Relief Outlet Connection 12 17 Intermediate Relief Block Connection part of relief block assembly that includes relief valves 45 amp 19 18 Intermediate Block 19 Line Pressure Relief Valve 20 Heater Unit Note Carbon Dioxide an Nitrous Oxide units ordered without a heater do not include item 20 FIGURE 2 3 Internal Components AGM2HL 2 3 20454 REL 0000 0503 Pipeline Line Relief Valve Distribution System l Pressure Gauge Bleeder Valve 5 Line Pressure Pressure Cylinder Pressure ki Line Regulator
39. en 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 to prevent corrosion 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 items or call Western Enterprises for parts information 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
40. ght Tube Adaptor PART t RWS 6 5 RWS 1 8 RWS 3 70 S 5 RWS 3 81 RWS 1 3 253 BST 4LP WLF 3 6 P 4HP 92 15 8CV RWS 3 47 RWS 5 7 RWS 6 4 WLF 3 5 Part of Repair Kit RK 1038 oxygen and RK 1037 other gases 5 8 B20454 REL 0000 0503 Western Enterprises Repair Drawing Automatic Changeover Manifold AGM2 AGM2HL amp AGM2HP Series Check Valve Components DESCRIPTION Poppet Spring Washer Cap included in repair kit RK 1041 PART t WMV 1 5 WMV 1 6 WMV 1 7 WMV 1 8 B20454 REL 0000 0503 Western Enterprises Automatic Changeover Manifold AGM2 AGM2HL amp AGM2HP Series Repair Drawing Intermediate Regulator Components 2 11 4 1 Z KEY DESCRIPTION PART amp 1 Regulator Body WLR 1 1 2 Seat Capsule WLR 1 10 3 NPT Adaptor BA 4HP 4 Pivot RWC 2 8 5 Bonnet RWS 2 2P 6 Bushing Retainer RWC 3 14 7 Bonnet Bushing RWC 3 12 8 Slip Ring AGM2 amp AGM2HL RWS 3 17 AGM2HP RWS 7 4 9 Diaphragm Assembly RWS 3 28 10 Delivery Spring AGM2 amp AGM2HL WLR 1 8 AGM2HP RWS 1 12 11 Adjusting Screw WLR 1 11 12 1 4 NPT Plug WLF 1 21 13 Anti Vibrator AGM2 AGM2HL WLR 1 14A AGM2HP WLR 1 14 14 Size Elbow 253 15 3 8 Tube Elbow WLF 3 6 Part of Repair Kit RK 116
41. he Primary bank of cylinders is depleted the gas pressure from the primary regulator will begin to fall When the Primary pressure falls below the pressure setting of the intermediate regulator the check valve is pushed open and the Secondary bank of cylinders begins to supply the system 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 regulator inlet port is connected to the outlet of the intermediate block on the manifold control assembly One regulator outlet port is connected to the outlet block The other two outlet ports are plugged Gas enters the regulator through the inlet port and with 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 dia
42. itch The ohmmeter should register approximately zero 0 ohms resistance when connected to each switch Adjust or replace any faulty switch See Section 4 for servicing the pres sure switches Reconnect the ohmmeter to the female flat blade connectors on the end of 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 Close the bleeder valve S l o w I y open one cylinder valve on the left bank of cylinders 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 6 70 Verify that the ohmmeter returns to approximately zero 0 ohms resistance Rotate the control knob clockwise to make the right cylinder bank the supply Close the cylinder valve on the right 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 settings indicated in the specification chart in Section 1 Close the bleeder valve S l o w l y open one cylinder valve on the right bank of cylinder
43. ld control and two supply bank headers one primary and one secondary supply to provide an uninterrupted supply of gas for the specific gas application The manifold control includes the following components and features green system normal and red replace depleted cylinders indicator lights cylinder pressure gauges 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 rigid copper pigtails for oxygen 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 schemat ics 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 Primary 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 the pressure gauge one ey Master vawe Gas then flows to the primary regulators on all manifolds except those for Nitrous Oxide and kee Carbon Dioxide service Nitrous Oxide and Carbon Dioxide systems include 500 SCFH capacity h
44. ll interior surfaces of the regulator body with isopropyl alcohol or 1 1 1 trichloroethylene solvent CAUTION e 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 and debris may be propelled into unprotected eyes 6 Blow out the regulator body and ports with oil free air or nitrogen to remove all Foreign materials and dry all surfaces 4 5 B20454 REL 0000 0503 Reassembly 1 Apply a thin coating of Fluorolube S 30 lubricant to the o rings CAUTION See section 5 for a picture showing the proper assembly of the regulator 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 gasket over the seat holder and stem Place the spring retainer on the compensating 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
45. lluminates and the green light is extinguished when the manifold changes over from Primary to Secondary supply Close the bleeder valve and recap S l o w I y open all remaining cylinder valves on the left and right banks of cylinders Rotate the control knob to select the bank that was in service before maintenance was performed Remove the control knob from the four way valve Note position of knob before removal Close cabinet door and replace control knob on four way valve Align knob to same position as be fore removal See section 4 How to open the manifold Trouble Shooting SYMPTOM PRIMARY REGULATOR Venting at relief valve Gas leakage around primary valve body halves Pressure regulator body and bonnet FOUR WAY VALVE Gas leakage around joint in valve body halves Gas leakage through body wall Both banks feeding PROBABLE CAUSE Over pressure due to creeping or faulty regulation of primary regulator Loose bonnet Diaphragm leak Body halves not joined tightly enough O rings worn Porosity holes developed in casing Four way valve seats leaking INTERMEDIATE PRESSURE REGULATOR Gas leakage around regulator body bonnet Required gas flow not available after change over occurs Both banks feeding LINE PRESSURE REGULATOR Gas leakage around regulator body bonnet Loose bonnet Intermediate regulator not set correctly Intermediate regulator set at too
46. manifold as explained in the How to open the manifold and How to shut down the mani fold sections Note e 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 2 Using an 11 16 and 5 8 open end wrenches remove the pressure switch from the regulator tee The connection is a CGA 022 swivel WARNING e Be sure power is off when making electrical connections Current flowing though the wires may shock the service technician blow fuses and or damage test equipment 3 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 Replacement 1 Using an 11 16 and a 5 8 open end wrench Install the pressure switch on the primary regulator and tighten to effect a gastight seal 2 Complete the adjustment instructions below prior to installing the signal wires to the pressure switch 4 7 B20454 REL 0000 0503 Adjustment WARNING Be sure power is off when making electrical connections Current flowing though the wires may shock the service technician blow fuses and or damage test equipment Connect an ohmmeter to the normally closed and common electrical contacts on the switch The ohmmeter should register nearly zero resistance Begin pressurizing the bank ma
47. n chart in Section 1 Should the intermediate pressure for either bank drop below this preset level the switch will indicate an alarm condition that changeover has or is about to occur FIGURE 2 7 Heater Electrical Schematic HEATER pressure switches off each primary regulator monitor the 2 5 20454 REL 0000 0503 check valve between the intermediate regulator and intermediate block provides seal barrier between the higher pressure gas from the primary regulator and the lower pressure gas from the intermediate regulator This barrier provided by the check valve is the dividing point between the left and right bank It also under certain conditions prevents backflow through the intermediate regulator When gas pressure from the depleted primary bank drops below the pressure setting of the intermediate regulator the check valve opens and allows gas flow through the intermediate regulator from the secon dary bank The relief block assembly is a common junction for all of the relief valves connected by tubing to their respective compo nents The relief valves prevent dangerous over pressurization of the manifold in the event that a regulator should fail The relief valve settings are noted in the adjustment specification chart in Section 1 For manifolds located inside the out let of the relief block assembly should be vented to the outside When both cylinder
48. nifold by opening one cylinder valve on the side of the manifold switch is on At the actuation pressure the ohmmeter reading will jump from nearly zero resistance to infinite resistance Close the cylinder valve 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 nearly zero resistance Note If switch adjustment is performed while manifold is in service then the steps outlined in How to deplete the sec ondary bank must be used instead of opening the bleeder valve in step 4 above Close the bleeder valve The pressure switch knurled adjustment screw also has holes along with the knurling to accommodate a 5 64 Allen wrench The inserted Allen wrench provides leverage to make adjustment easier Using an Allen wrench or flat blade screwdriver turn the knurled adjustment screw on the pressure switch clockwise to raise the set point or counterclock wise 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 8 After the setting has been made connect the signal wires to the appropriate contact
49. nt procedures are to be followed only if the line regulator assembly is to be scrapped All service may be performed to the line regulator without removing it from the manifold Open the valves isolating the bypass line regulator and close the valves isolating the regulator being serviced Removal 1 2 Using 1 and 1 1 4 wrenches disconnect the union connections on both sides of the line regulator Remove the regulator from the dual line assembly Disassembly 1 2 Remove regulator following the instructions above Use 11 16 wrench to loosen retaining nut Rotate the adjusting screw of the regulator counter clockwise out with a 5 8 socket wrench and remove Remove the bonnet by holding the body hex with wrench to stabilize the assembly and using another wrench to loosen the bonnet The adjusting spring vibration dampener and pivot will come off with the bonnet Remove the diaphragm assembly and slip ring Using a 1 socket wrench rotate the seat capsule counterclockwise and remove the seat capsule CAUTION Do not stand directly in front of the body and ports 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 regulator body and ports with oil free air or nitrogen to remove all Foreign materials and dry all surfaces 4 18 B20454 REL 0000 0503 Reassembly
50. ocation which exposes it to ambient temperatures below 20 F 7 C is not recommended Breathing Air 1200 SCFH maximum at 50 psig delivery with a 15 psi pressure drop and 2000 psig inlet pressure Helium 1200 SCFH maximum at 50 psig delivery with a 15 psi pressure drop and 2000 psig inlet pressure Carbon Dioxide The flow capability of a Carbon Dioxide cylinder manifold will depend upon conditions at the installation site demands of the delivery system and the number of cylinders in supply service Maximum 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 alarm lights on the manifold Under normal operation the manifold will draw a maximum of 40 milliamperes 040 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 regulator preventing freeze up
51. 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 Instruction manual for warranty information B20454 REL 0000 0503 CAUTION e Failure to adhere to the following instructions may result in person injury or property damage e 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 e Cylinder header and master valves should always be opened very s l o w l y Heat of recompression may ignite combustible materials e Pigtails should never be kinked twisted or bent into a radius smaller than 3 inches Mistreatment may cause the pigtail to burst not apply heat Some materials may react while in contact with some gases particularly oxygen and nitrous oxide e Cylinders should always be secured individually 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 e Welding should never be performed near nitrous oxide piping Excessive heat may cau
52. one or both banks installed in direction against flow of the check valve Control knob was rotated to select new service side without changing empty cylinders Pressure switch wiring incorrect or disconnected One or both pressure switches may be set at too high a pressure Primary regulator set at too low a pressure REMEDY OR CHECK Check Electrical power supply Adjust intermediate regulator setting per specification Adjust pressure switch per specifications Slowly open valves Check that all pigtails are installed correctly check valve ends connect to cylinders Replace depleted cylinders Check pressure switch wiring Adjust pressure switch per specifications Adjust primary regulator delivery pressure per specifications OPERATIONAL One or more cylinders remain full after manifold indicates a depleted bank Some pigtails installed in direction against the flow of the check valve 3 5 Check that all pigtails are installed correctly check valve ends connect to cylinders B20454 REL 0000 0503 This page intentionally left blank 3 6 B20454 REL 0000 0503 SECTION 4 SERVICE PROCEDURES GENERAL MAINTENANCE 1 Main section a Daily record line pressure b Monthly 1 Check regulators valves and compression fittings for external leakage 2 Check valves for closure ability c Annually 1 Check relief valve pressures 2 Check primary regulator seats 2
53. p REPAIR PARTS AGM2 SERIES REGULATORS AND REGULATOR REPAIR KITS AGM2 Series Primary Regulators WMS 13 68 Left Primary Regulator for AGM2 Oxygen amp Air WMS 13 73 Right Primary Regulator for AGM2 Oxygen amp Air WMS 13 69 Left Primary Regulator for AGM2 He WMS 13 74 Right Primary Regulator for AGM2 He WMS 13 72 Left Primary Regulator for AGM2 AGM2HL amp AGM2HP amp 20 WMS 13 77 Right Primary Regulator for AGM2 AGM2HL amp AGM2HP CO amp 0 WMS 13 70 Left Primary Regulator for AGM2HP He WMS 13 75 Right Primary Regulator for AGM2HP He WMS 13 71 Left Primary Regulator for AGM2HP Oxygen amp Air WMS 13 76 Right Primary Regulator for AGM2HP Oxygen amp Air RK 1037 Repair Kit for WMS 13 69 WMS 13 70 WMS 13 72 WMS 13 74 WMS 13 75 amp WMS 13 77 Primary Regulators 1038 Repair Kit for WMS 13 68 and WMS 13 71 WMS 13 73 WMS 13 76 Primary Regulators Oxygen amp Air AGM2 Series Line Regulators WLR 13 60L Left Line Regulator for AGM2 amp AGM2HL Air He CO 0 O gt N gt WLR 13 60R Right Line Regulator for AGM2 amp AGM2HL Air N2O O gt WLR 13 200L Left Line Regulator for AGM2HP Air He CO 0 No WLR 13 200R
54. phragm 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 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 is compressed the gas pressure required to lift the diaphragm increases resulting a higher delivery pressure from the outlet port of the regulator 2 9 B20454 REL 0000 0503 LEGEND 1 Adjusting Screw 2 Bonnet Assembly 3 Pivot 4 Adjusting Spring 5 Diaphragm Assembly 6 Slip Ring 7 O ring 8 Body 9 Capsule 10 Seat Assembly 11 Filter 12 Friction Damper FIGURE 2 14 Line and Intermediate Pressure Regulator 2 10 B20454 REL 0000 0503 FIELD TESTING amp TROUBLE SHOOTING SECTION 3 The manifold performance tests are use to verify the manifold functional performance When used in conjunction with the trouble shooting charts the technician can verify proper performance or rapidly identify the probable so
55. r valve The 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 intermediate gauge for two minutes Verify that the primary regulator does not exhibit creep which is a gradual increase in pressure Verify that the left side cylinder contents gauge indi cates a minimum of 2000 psig for Oxygen Nitrogen or Air systems Nitrous Oxide and Carbon Dioxide systems should indicate a minimum of 700 psig Ad just to the proper line pressure if necessary Verify the line pressure gauge is indicating a mini mum of 50 psig on all systems except Nitrogen Ni trogen 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 B20454 REL 0000 0503 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 Rotate the control knob to its fully clockwise position S I o w I y open one cylinder valve on the right bank
56. ru 1 1 1 8 1 3 8 1 1 2 and 1 3 4 Fluorolube amp 5 30 lubricant 240 Liquid leak detector Teflon tape Available from local source Available from local source Available from local source Available from local source Available from local source Available from local source Provided with manifold Available from local source Available from local source Available from local source Manufactured by Occidental Chemical Corporation Niagara Falls New York Available from E I Du Ponte Wilmington Delaware Available from Western Enterprises Part number LT 100 Available from Western Enterprises Part number MTT 1 or MTT 2 Fluorolube is a registered trademark of Occidental Chemical Corporation Teflon is a registered trademark of E du Pont de Nemours amp Co Inc Krytox is a register trademark of E I du Ponte de Nemours amp Co Inc 1 4 B20454 REL 0000 0503 2 GENERAL INFORMATION This section concentrates on the basic theory of operation of the components of the 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 manifo
57. s Verify that the ohmmeter returns to approximately zero 0 ohms resistance Close all cylinder valves and vent all remaining gas from the manifold Remove the ohmmeter leads from the black and brown wires Close the bleeder valve Connect the fail safe wire harness to the case wiring harness Be sure wire colors match Observe the cabinet indicator light Verify that the green indicator is off and the red indicator is lit S I o w l y open one cylinder valve on the left and right banks of cylinders Observe the cabinet indicator light Verify that the green indicator is lit and the red indicator is off Close the cylinder valve on the right bank of cylinders Open the bleeder valve to create a slight flow of gas through the manifold Verify that the red light illuminates and the green light is extinguished when the manifold changes over from Primary to Secondary supply Close the bleeder valve 71 72 73 74 75 76 77 78 79 80 81 3 3 S l o w I y open one cylinder valve on the right bank of cylinders Rotate the control knob counterclockwise to make the left cylinder bank the Primary bank Observe the cabinet indicator light Verify that the green indicator is lit and the red indicator is off 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 that the red light i
58. s on the pressure switch CHECK VALVE REPAIR INTERMEDIATE Removal 1 3 Open and shutdown the manifold as explained in the How 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 four way 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 cap 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 1 1 1 trichloroethylene solvent CAUTION e Do not stand directly in font 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 6 Blow out the check valve body with oil free Air or Nitrogen to remove all foreign material and dry all surfaces 4 8 20454 REL 0000 0503 Reassembly 1 2 3 4 Insert a new valve poppet into the valve body Insert the spring into the valve body Position the new seal washer in the groove of th
59. se the gas to dissociate creating an explosive force e Do not use leak test solution that contains ammonia Solutions containing ammonia may cause brass tubing and fittings to crack ABBREVIATIONS C Common NPT National Pipe Taper Threading CGA Compressed Gas Association NFPA National Fire Protection Association FT LBS Foot Pounds OSHA Occupational Safety amp Health Administration IN LBS Inch Pounds PSIG Pounds per Square Inch Gauge N C Normally Closed SCFH Standard Cubic Feet per Hour N O Normally Open VAC Voltage Alternating Current 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 B20454 REL 0000 0503 TABLE CONTENTS SECTION 1 INTRODUCTION 1 1 Product 1 1 Installation 1 1 Manifold Specifications 1 2 Adjustment Specifications 1 3 Recommended Tools and Test Equipment 1 4 SECTION 2 THEORY OF OPERATION 2 1 General Information 2 1 Manifold Operati ERES 2 1 Primary Regulator TT 2 6 Check VAVO S dee 2 7 Four Way
60. tect 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 Overall Manifold Length Manifold s Depth 10 WESTERN INNOVATOR AM me Example 2 9 4 Overall manifold length 5 8 7 4 9 0 10 8 12 4 1 73 m 2 24 m 2 74 m 3 25 m 3 76 m Figure 1 1 Installation Dimensions 1 1 20454 1 0000 0503 MANIFOLD SPECIFICATIONS Flow Capability Oxygen 1200 SCFH maximum at 50 psig delivery with a 15 psi pressure drop and 2000 psig inlet pressure 500 SCFH maximum at 50 psig delivery with 5 psi pressure drop and 2000 psig inlet pressure Nitrogen 1200 SCFH maximum at 160 psig delivery with 15 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 Maximum capability is 500 SCFH at 50 psig delivery and 750 psig inlet pressure Installing a Nitrous Oxide manifold in a l
61. ter port is a gauge which indicates intermediate pressure The bottom port is plugged 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 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 outlet port is located 180 from the inlet The line pressure is shown on the line pressure gauge on the front of the cabinet Gas flows out of the line regulator and into the outlet block The outlet block has 5 ports The bottom port is connected di rectly to the dual line assembly The left port is connected through tubing to the line relief valve in the relief block assem bly The center port is connected to a line pressure gauge 1 SOWIE NAE The right port is connected to a shutoff valve for testing The top port is connected to the piping distribution system A THERMOSTATS intermediate pressure both banks Both switches the same setting which is between the settings of the primary regu lator and intermediate regulator The switch settings are noted a in the adjustment specificatio
62. the seal are detected by faulty manifold function When replacing seals use care not to damage sealing surfaces 4 2 B20454 REL 0000 0503 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 Replace parts with all components in the repair kit HOW TO OPEN THE MANIFOLD Disassembly 1 Using the 5 32 allen wrench provided with manifold remove the knob NOTE e Prior to removing the knob make note of the knob orientation When re attaching the knob it should be oriented in the same position as when it was removed 2 Turn the latch counter clockwise and open the door 3 The knob should be reattached with the door open to allow the four way valve to be rotated Reassembly 1 Reverse order of disassembly MANIFOLD CABINET COVER REMOVAL Disassembly 1 Open the manifold as explained in the How to open the manifold section NOTE e Prior to removing the knob make note of the knob orientation When re attaching the knob it should be oriented in the same position as when it was removed 2 Disconnect wires from indicator light on cabinet door Note how the wires are connected so
63. tor a slip ring washer and the regulator bonnet as the bonnet is tightened down on the body 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 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 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 Spring will be slightly greater than the downward pressure of the bonnet spring and the seat nozzle will close As gas is released Seat from the low pressure chamber a proportional amount 3 Valve of gas will be let into the low pressur
64. tor without removing it from the manifold Shutdown the manifold and open the manifold as explained in the How to open the manifold section NOTE e 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 Mark the compression fittings per the instructions on page 4 2 Using an 11 16 open end wrench disconnect the 1 3 outlet tubing and relief tubing from the regulator at the compression fitting joints Using 11 16 and 5 8 open end wrenches remove the pressure switch from the tee on the regulator The connection uses a B size swivel nut Using two 1 1 8 hex wrenches disconnect the regulator from the inlet block at the CGA union connection Disassembly 1 2 Remove the nut from the regulator by turning it counterclockwise using a 11 16 wrench Using a flat blade screwdriver turn the adjusting screw counterclockwise until it turns freely and all compression is removed from the bonnet spring 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 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 Clean a
65. urce of the problem NOTE All testing should be done using full cylinders Using partially empty cylinders may result in improperly set components PERFORMANCE VERIFICATION PROCEDURE 1 10 11 12 Remove control knob from four way valve Note position of knob before removal See Section 4 How to open the manifold Open cabinet door and reinstall the control knob on the shaft of the four way valve Align knob to same position as before removal Connect the electrical power source to the manifold and verify that the red light is on Rotate the control knob counterclockwise to make the left cylinder bank the Primary supply and the right the Secondary supply Open the master valves located on the cylinder header prior to pressurizing the manifold S l o w l y open one cylinder valve on the left bank of cylinders S l o w l y open one cylinder valve on the right bank of cylinders Using a leak detect solution verify that there are no leaks present at the connections Close the cylinder valves on the left and right banks of cylinders 20 Uncap and 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 21 Close the bleeder valve S l o w l y open one cylinder valve on the left bank 22 of cylinders 3 1 13 14 15 16 17 18 19 Create a slight flow of gas through the bleede
66. w of the regulator in while observing the line pressure gauge Set the regulator to the desired pressure 7 Readjust the regulator to the proper specifications if necessary Use Adjustment Specification chart in Section 1 8 Close the bleeder valve The line pressure gauge will go up slightly higher than the flowing adjusted pressure 9 Verify that the regulator does not creep by observing the line pressure gauge for two minutes The gauge must indi cate the same pressure at the end of the two minute period 4 14 B20454 REL 0000 0503 SECTION 5 MANIFOLD MAINTENANCE amp REPAIR PARTS REPLACEMENT PIGTAILS 24 Stainless Steel Flexible Braid with Check Valves 36 Pigtails for staggered systems have part numbers that end with 36 320 24 0 00000 CGA 320 for Carbon Dioxide COs Service 326 24 CGA 326 for Nitrous Oxide 0 Service WDRGOCHN kuR 540 for O gt Service 926 24 igenes CGA 580 for Nitrogen Service 346 24 346 24 Synthetic Fiber with Check Valve 5 92 24 580 for Helium Service for medical service PRESSURE GAUGES 2 Diameter 1 4 Back Port 3 3 100

AGM2 Service Manual - Western Enterprises

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