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Agilent Technologies 6850 II Series Installing Manual

Installing the co2 cryogenic oven cooling kit, network gc system accessory
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Installing the CO
Oven Cooling Kit
Agilent 6850 Series II Network GC System
Accessory G2625B
This kit contains:
Description
Chassis
Chassis Cover
Ship kit:
•
Cooling coil
•
Coil bracket
•
Coolant filter
•
1/16-inch Vespel ferrule
•
Port connector
•
Stainless steel nut for 1/16-inch tubing
Restrictor tube
Machine screws, M4 x .7 12 mm
Installation sheet (this document)
The kit is factory-assembled. Do not disassemble it during installation. The
GC must have firmware revision A.03.00 or higher.
Cryogenic
2
Quantity
1
1
1
1
1
1
2
1
2
1
8
1

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Summary of Contents for Agilent Technologies 6850 II Series

  • Page 1 Installing the CO Cryogenic Oven Cooling Kit Agilent 6850 Series II Network GC System Accessory G2625B This kit contains: Description Quantity Chassis Chassis Cover Ship kit: • Cooling coil • Coil bracket • Coolant filter • 1/16-inch Vespel ferrule • Port connector •...

  • Page 2: Parts Identification

    Installing the CO Cryogenic Oven Cooling Kit Parts identification Parts identification Chassis cover Coil bracket Cooling coil Chassis Nuts Restrictor tube Vespel ferrules Machine screws Connector Filter Tools required ® • Torx T-20 screwdriver • Open-end wrench • Cylinder wrench •...
  • Page 3 Installing the CO Cryogenic Oven Cooling Kit Overview Overview Caution Before continuing, read the safety information at the end of this document. Disconnect the GC. Install the inlet if you will be using a cool on-column inlet with cryo blast or PTV inlet with cryo cooling. Open the GC.
  • Page 4 Installing the CO Cryogenic Oven Cooling Kit Install the inlet Turn off the GC and unplug the power cord. Allow time for all heated zones to cool. Open the lid. If a column is installed, disconnect it at the detector end. Remove the nut warmer, insulation, and capillary adapter, if present.
  • Page 5 Installing the CO Cryogenic Oven Cooling Kit Open the GC Open the GC Open the lid and locate the counterbalance cam in the left rear corner under the lid. Keeping the lid open with one hand, loosen the screw on the right side of the cam and lower the stop plate (on the right side of the counterbalance cam).
  • Page 6 Installing the CO Cryogenic Oven Cooling Kit Open the GC Remove the seven T-20 Torx screws on the back panel. Tilt the top of the panel away from the GC. Remove Follow the wires from the ventilating fan to the cable connector. (Not all units have this fan.) Disconnect the cable and set the panel aside.
  • Page 7 Installing the CO Cryogenic Oven Cooling Kit Open the GC Locate the plastic plug in the large hole on the left side of the GC. From the back of the unit, depress the locking ribs on the sides of the plug with a long, flat-blade screwdriver and remove it.

  • Page 8: Install The Chassis

    Installing the CO Cryogenic Oven Cooling Kit Install the chassis Install the chassis The chassis holds the cryo valve and related hardware. If you are installing PTV cryo, install the valve onto the lower-left position of the chassis, including the screws to hold it in place. See the figure on the next page.
  • Page 9 Installing the CO Cryogenic Oven Cooling Kit Install the restrictor tube There are four mounting holes for the chassis on the left side of the GC (two of them are in the row of ventilation slots at the top). Place the chassis over the holes.
  • Page 10 Installing the CO Cryogenic Oven Cooling Kit Install the cooling coil Inside the oven, check that the bend on the end of the restrictor tube points up. Tighten the union nut an additional 1/2 turn. Tube bends up Install the cooling coil The cooling coil is part of the ship kit.
  • Page 11 Installing the CO Cryogenic Oven Cooling Kit Install the cooling coil Place the cooling coil in the oven with the fitting at the upper left. The bottom center of the coil should rest on the coil bracket. Remove the stainless steel plug from the fitting on the end of the restrictor tube.
  • Page 12 Installing the CO Cryogenic Oven Cooling Kit Install the chassis cover Check that: • The restrictor tube enters the oven and turns upward. • The restrictor tube is connected to the coil and the fittings are finger tight. • The coil is near to, but makes minimal contact with the heater shroud. Tighten the nut on the restrictor tube 1/2 turn past finger tight.
  • Page 13 Installing the CO Cryogenic Oven Cooling Kit Install the coolant filter Add two more screws at the top, and tighten all four. Top screws (bottom screws not shown) Install the coolant filter Some GC owners have problems with particles in the CO supply that clog the cryo valve.
  • Page 14 Installing the CO Cryogenic Oven Cooling Kit Install the coolant filter One fitting Remove the nut and ferrules from the coolant inlet fitting. Use these parts to attach the filter/connector assembly to the inlet fitting. Two fittings The following graphic identifies the fittings for the oven and the inlet. Oven coolant fitting PTV Inlet coolant fitting...
  • Page 15 Installing the CO Cryogenic Oven Cooling Kit Close the GC Install a “Tee” (part number 0100-0542) at the coolant fittings. Agilent recommends that you use spectral-link tubing (part SL-8). WARNING The high pressure LCO requires thick-walled, high pressure stainless steel tubing to avoid ruptures.
  • Page 16 Installing the CO Cryogenic Oven Cooling Kit Connect the cryogenic coolant supply Connect the cryogenic coolant supply Liquid CO is available in high-pressure tanks containing 50 pounds of liquid. The tank must have an internal dip tube or eductor tube to deliver liquid CO instead of gas.
  • Page 17 Installing the CO Cryogenic Oven Cooling Kit Restore the GC to operating condition Restore the GC to operating condition Install the capillary adapter, if used. Restore the column connection. Restore carrier and other gases to the instrument. Restore power. Apply your normal operating pressures. Leak-check the manifold, back panel, and column fittings.
  • Page 18 Failure to comply with these precautions violates safety standards of design and the intended use of the instrument. Agilent Technologies assumes no liability for the customer’s failure to comply with these requirements.

This manual is also suitable for:

G2625b