Nexus Installation and Start-Up Instructions


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Nexus Installation and Start-Up Instructions

Thank you for ordering from Vacuum/Atmospheres Co. The purpose of this document is to provide the information required to successfully install and start your NEXUS DRI-LAB system.

Shortly after VAC received your order, your VAC account representative contacted you. During that conversation, details of your order and system configuration were discussed. A system diagram was prepared for you based on that conversation. When you receive the diagram, please check it carefully to be sure the configuration is as discussed. The diagram also specifies critical dimensions of your system and the clearances required. Please note these dimensions carefully to determine first that the system can be moved from the receiving dock to your laboratory and second, to confirm that you have sufficient room in your lab. Please contact VAC immediately if there appears to be any problem

I. Things you will need to be ready to start your system when it arrives.

A. Materials needed:

1) Inert gas- helium, nitrogen or argon. Typically a volume equal to 10 to 15 times the volume of the glove box plus one K type cylinder. This is a total of 625 cubic feet for a single length Dri-Lab and 875 cubic feet for a dual length Dri-Lab. (1 K type cylinder = approx. 250 cu. ft.)_

  • 2 to 3 ea. K type cylinders for a single length Dri-Lab

  • 3 to 4 ea. K type cylinders for a dual length Dri-Lab

2. 1ea. Cylinder of regeneration gas, 1% to 4% hydrogen in argon or nitrogen. Helium is not recommended for this purpose.

3. Dual stage gas regulators, 1 ea. for inert gas supply and 1 ea. for regeneration gas supply. The regeneration gas regulator should be a left handed thread type used for explosive gasses. Please note that the recommended regeneration gas mixture is NOT an explosive gas. (Need recommended flow rate e.g. 35 psi @? cfm for each regulator)

4. 3/8" stainless steel or soft copper tubing. The length should be sufficient to connect the inert gas and the regeneration gas to the utility strip on the Dri-Train and to connect the regeneration gas outlet to your fume hood or exhaust gas duct. If your system options include antechamber purge, the antechamber purge outlet should also be connected to the fume hood. VAC recommends that the regeneration outlet line be kept at as short a length as possible.

5. 1" or larger tubing to connect the glove box purge outlet and the vacuum pump outlet to exhaust gas duct or fume hood. These outlets have 1" npt fittings. PVC piping or Tygon tubing is satisfactory for this connection. We recommend that you consult your facilities manager for further recommendations.

B. Utilities:

1. 3 ea. 120 VAC 50/60 HZ 20 Amp. power outlets.

  • 1 ea. for the Nexus Dri-Train (15A), 1 ea. for the DL-Light. (2A)

  • 1 ea. for user utilities inside the Dri-Lab

  • If your system includes a CS-40 Dri-Cold, add a fourth 120 Volt 20 Amp. circuit. Please consult your VAC account representative if your system includes other electrical devices. For areas where 120 Volt power is not available, consult VAC.

2. Cooling water and compressed air are not required.
Materials and Utilities Checklist

  • Inert gas

  • Regeneration gas

  • Tubing

  • regulators

  • Electrical

II. Unpacking and Inspection

A. Remove all the plastic wrapping from the unit. Carefully inspect for any sign of shipping damage. Call VAC immediately if any damage is noted. Be careful NOT to open the circulation valves on the back of the Dri-Lab. (See Figure 2)

B. Unpack the antechamber. Please unwrap all packing material to be sure no small system parts are accidentally discarded. The antechamber is where many small items such as manuals, gloves, foot switch and spare filters are packed for shipping.

C. Do not discard the packing material until you have checked the packing list to make sure that all the items you ordered were received. When the inventory is complete, then dispose of the packing material. If an item appears to be missing, contact your VAC account representative immediately.

D. The vacuum pump is bolted to the drip pan in the Dri-Lab stand to prevent damage due to movement during shipment. Optimum vibration free performance will be achieved if the lock-down nuts are released before placing the unit in service. The lock-down nuts are wing nuts located at two of the four feet of the vacuum pump. (Note to Production: these should be wing nuts) Remove them and put them in a safe place in case you need to move the unit in the future. (Figure 2). Examine the vacuum pump to make certain that no oil leaked during shipment. Proper vacuum pump maintenance is essential to continued good performance of the system. Please read the vacuum pump manual completely. The vacuum pump should be plugged into the receptacle in the system junction box marked "vacuum pump".

E. If your system includes an HE-213-4E Internal Glove Port Cover, release it from the glove port it was mounted on during shipment and stow it on the glove port cover bracket that hangs from the ceiling of the Dri-Lab. Please see attached instructions for the Internal Glove Port Cover for details.

III. Final Setup

A. If your system includes adjustable shelves, install them on the shelf standards at this time.

B. (Insert section and figure 2-1 from Dri-Lab manual on glove installation.)

C. Remove plugs and caps from the glove box purge vent outlet (fig x), the regeneration gas oultet (fig.y).

D. Remove the monitor from shipping box and follow the enclosed directions for installing the base. Place monitor on top of the antechamber. Plug the monitor electrical cord into the system junction box. Connect the video signal cord to the back of the monitor and to the video output on the top of the system control unit. (fig.2). These connections are exactly the same as those used to connect a monitor to a PC (Personal Computer).

E. If your system includes a Moisture monitor, unpack the moisture probe/transmitter at this time. Install it in the moisture probe port on the side of the glove box using Teflon tape or Loktite as a sealant. Plug the moisture data line cord into the back of the moisture transmitter, taking care that it is "keyed" correctly. Read the instruction packed with the moisture probe. (There must be a better way to say this.)

IV. Utility Connections

A. Before proceeding to the next step, ascertain that the main on/off switch on the user interface control panel is in the OFF position.

B. Plug the system electrical cord, the user utility cord and the DL-Light cord into 120 VAC outlets specified in section I.

C. If your system includes a CS-40 Dri-Cold Freezer, open the door at this time, but DO NOT turn the unit on.

D. Install the inert gas regulator and the regeneration gas regulator on the proper gas cylinders. Now connect the inert gas regulator to the inert gas inlet. Connect the regeneration gas regulator to the regeneration inlet. See fig x.

E. Connect exhaust lines as follows:

1. Vacuum pump exhaust and glove box purge outlet to fume hood or exhaust duct using 1" tubing.

  1. Regeneration gas outlet, and antechamber purge outlet to fume hood or exhaust duct. It is important to make the regeneration gas exhaust line as short as possible or install a water trap in the line to prevent condensed water from the regeneration process from draining back into the gas purifier. Use 3/8” tubing for these lines.

  1. Set both the inert gas regulator and the regeneration gas regulator to 35 psi.

  2. Cut the plastic cable ties off of the circulation valves in the back of the unit but DO NOT open the valves yet.



You are now ready to start your NEXUS system


  1. Turn on the power switch on the user interface keypad. Allow a few seconds for the system to “boot-up”. The monitor should display a screen labeled “START-UP/RESTART MENU”. Read the screen instructions carefully. Press the “esc “ key to enter the normal operating mode.

  2. Prior

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