AMSCO 900 Series Heating Element Installation Guide






How To Replace The AMSCO 900 Series Heating Element

Part #AMH096-1395


  1. Remove old heater
  2. Inspect and clean outside of chamber
  3. Install new heater(s), making sure that contact between heater and chamber is evenly distributed


    4. CAUTION: To assure no burnouts due to hot spots, be certain that Chamber surface is dry and smooth & Contact of heater to chamber is completely even and uniform

  4. Replace back-up plate
  5. Sequentially tighten tie down bands. The same amount of torque should be applied to all three bands (maximum 40 in. lbs.)
  6. Perform final inspection. Verify that the curvature of the heater(s) matches the chamber and no gaps exist
Notes

This Heating element contains a mica material with an adhesive that may cause a non-toxic smoke when initially energized.
Heater installation should be performed in a well ventilated area. Also, allow 10 to 15 minutes “burn in” time before placing the autoclave back in service
After “burn in” time, retighten the tie down bands. This will ensure better surface contact between heater and chamber
Excessive tightening of screws may cause heater to fail


Service Tips

Do’s and Don’ts of Heater Replacement

    After removing the heater element

    DO inspect the chamber for distortions and holes in the surface. During inspection, look for:
    1. High or low spots on the chamber surface which could cause hot spots to develop thus causing the element to prematurely fail; and
    2. Holes which would allow water leaks. If any distortions or holes are found, it is recommended to replace the chamber


    When installing the new heater element

  • DON’T forget to remove the copper plate if one exists
  • DO install the overtemp switch (Part #PCT042-1396) on the new heater element’s flip out tab (on the center heater only) when replacing the original mica element
  • DO make sure that the backup plate is not touching the electrical terminals on your new heater before tightening down bands
  • DO make sure all wires are away from the heater and not pinched before tightening down the bands
  • DO make sure that contact between the heater and chamber is evenly distributed
  • DO expect some “smoking” during the “burn-in” procedure after installing a new heater element
  • DO tighten bands (about 40 lb in. maximum torque) when the machine is “cool” and then again after the first few cycles when the machine is “warm”
  • DO stress to the operator the importance of not letting the chamber run dry - the operator must remember to turn the machine “off” after each use and especially at the end of the day.
    If the chamber runs dry, the surface could become warped and/or holes could develop on the surface of the chamber
  • DO stress to the operator the importance of using distilled water, not tap water

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