• SIGNA™ Hero 3.0T Service Methods
  • 5852800-8EN Revision 1.0
  • Object ID: 00000018WIA3091D230GYZ
  • Topic ID: id_15668211 Version: 1.13
  • Date: Jan 26, 2022 3:41:24 PM

VRMw manifold replacement

Prerequisites

Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1-8 hours-
Tools and test equipment
ItemQuantityPart numberManufacturer
Safety Glasses1 for each person--
Authorized Personnel Floor Sign (included with Safety Signage Kit 46-258770G4)12289812-
Nonmagnetic Titanium Service Tool Kit, Large Set15112581-
5 Gallon Pail12239133-
Dispenser of 100 #6005 Large N-DEX Nitrile Disposable Gloves Best #6005L146-194427P400-
Consumables
ItemQuantityPart numberManufacturer
Coolant (1 Gallon Container) (See Required Conditions)155174313-
Coolant Fluid (5 Gallon Container) (See Required Conditions)35174313-2-
Coolant Manifold Replacement Kit1

See FRU Manual

-
Replacement parts
ItemQuantityPart numberManufacturer
VRMw Manifold 1

Refer to FRU manual

-
Required conditions

Approximately 4 gallons of coolant fluid is needed for each manifold replacement. FEs will decide which type of container to order.

Power to the ISC is turned off and the LOTO procedures are implemented.

LOTO for ISC (Integrated System Cabinet)

Remove the body coil.

RF Body Coil Replacement

Table 1. Safety
Topic ID: id_SL2292397-1180650

VRMw coil water removal

Procedure

  1. Note: Nitrile Gloves must be worn when performing coolant removal.
    Note: Follow customers procedure for proper disposal of coolant.
    Turn off the valve in coolant supply line at the service end of the magnet.
    Figure 1. Turn off the valve
  2. Put an empty tank close to the magnet service-end to accept discharge coolant.
    Figure 2. Draining manifold supply
  3. Carefully disconnect manifold supply and return lines (one at a time) from the barbed connections below the closed valves. Direct supply line towards the reservoir and empty as much coolant as possible into the reservoir. (See Figure 2.)
  4. Obtain a one inch barbed fitting from the Coolant Removal Kit and attach it to return line. Connect the pump-to-mainfold adapter to return line through the barbed fitting. (See Figure 2.)
  5. Attach the manual pump from the Coolant Removal Kit to the other end of the adapter (if not attached already).
  6. Start pumping air while observing coolant discharge.
  7. Continue pumping until no more coolant comes out. This should take approximately 10 to 15 minutes.
Topic ID: id_SL2292407-1180650

Old manifold removal

Procedure

  1. With the magnet rear end-bell and the rear pedestal removed, the VRMw manifolds are accessible.
  2. Ensure that the valves in coolant supply line at the VRMw service-end are turned off and coolant has been purged from the VRMw coil.
  3. Remove the five cable ties that are securing the manifolds. (See Figure 3.)
    Figure 3. Cable ties
  4. Note: A non-magnetic side cutter is required to cut heat shrink.
    Using a non-magnet knife, carefully cut open the heat shrinks at the manifold-to-inner coil connections making sure not to cut the temperature sensor and wire when removing the heat shrink. (See Figure 4.)
    Figure 4. Removing heat shrink
  5. The stainless steel hose clamp will be exposed once the heat shrink is removed. If this is a crimped clamp, it cannot be opened with a screwdriver. Use a combination of non-magnet screwdriver and needle nose pliers to push the clamp away from the coil and slide it towards the flexible hose
  6. Once the hose clamp is open or pushed off the copper tube terminal, disconnect the manifold hose from the tube terminal.
  7. Repeat Step 4 through Step 6 to disconnect all manifold hoses from VRMw inner coil.
  8. Disconnect the manifold tubes from the copper fittings.
Topic ID: id_SL2972924-1180650

New manifold installation

Procedure

  1. Take the VRMw Manifold Coolant Supply (5500297) and assemble it on the coil. (See Figure 5 for corresponding hoses and coil locations.) Make sure an 18.5 stainless steel hose clamp (5339948) and a 35mm long piece of heat shrink (5322136) are inserted on each manifold leg before pushing the hoses into position, and make sure that all hose clamps are in a similar orientation.
    Figure 5. VRMw manifold coolant supply
  2. Make sure the manifold supply assembly is in the correct position. (See Figure 6.)
    Figure 6. Manifold coolant supply
  3. Take VRMw Manifold Coolant Return (5500298) and assemble it on the coil. Make sure an 18.5 stainless steel hose clamp (5339948) and a 35mm long piece of heat shrink (5322136) are inserted on each manifold leg before pushing the hoses into position, and make sure that all hose clamps are in a similar orientation. (See Figure 7 for corresponding hoses and coil locations.)
    Figure 7. VRMw manifold coolant return
  4. Make sure the VRMw Manifold Coolant Return is on the correct position. (See Figure 8.)
    Figure 8. Manifold coolant return
  5. Tighten the hose with five cable ties in below locations. (See Figure 9.)
    Figure 9. Cable ties
  6. Apply rubber splicing tape (46-294167P91 provided with the manifold replacement kit) to the clamps and any exposed copper tube terminals.
  7. Connect the supply and return manifold to the fittings of the main coolant lines on the magnet.
  8. Secure the connection with stainless steel hose clamps. Use a nonferrous screwdriver to make sure all connections are tight.
  9. Open the main coolant valve.
Topic ID: id_15838627

Finalization

Procedure

  1. Restore Body Coil by reverse order of removal.
  2. Remove the LOTO for the ISC.
  3. Refer to the ICC Hose and Valve Inspection, Coolant Fill, and Coolant Leak Check to add coolant to the GCU reservoir, turn on the heat exchanger pumps, and check the coolant system for leaks. The volume added should be close to that of the discharged coolant.
  4. Restore magnet front and rear end bells by reverse order of removal.
  5. Do a check scanto ensure the system is functioning correctly.