1200 DUAL HEATING ELEMENT


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Part #RCH026-2391
OEM Part #40266

DUAL HEATING ELEMENT
  • 1350W, 120VAC, ~10ohm; 100W, ~144ohm
  • Sheathing: Electrogalvanized Sheet Steel
  • Mounts on outside of chamber

Model(s) This Part Fits: 1200, 1250

How To Test The Dual Heating Element Instructions Are Lower On This Page

RCH026-2391 Heating Element

CAUTION!!!
DO NOT INSTALL HEATER
BEFORE READING!

The RCH026-2391 Heating Element MUST fit flush against the surface it is heating. If not, a pocket of air is formed between the heater and the sleeve creating a “hot spot”. This concentration of heat is enough to cause premature failure of the heater.

The lower sleeve is particularly subject to warping due to the extreme temperature cycles on a piece of metal restricted in only a few places. Flatness can be checked by placing a straight edge down the center of the sleeve where the old heater was mounted.

If gaps are visible, apply a little pressure. If the gaps disappear, the sleeve is most probably useable. If the gaps remain, the sleeve needs replacement before heaters can be successfully mounted.

RCH026-2391 HEATING ELEMENT INSTALLATION INSTRUCTIONS

1. Remove old heater in normal fashion.
2. Inspect and clean outside of chamber.
3. Install new heaters, making sure that contact between heater and chamber is evenly distributed.

Caution: To assure no burnout due to hot spots, be certain:

A. Chamber surface is dry and smooth.
B. 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 (40 in. lbs.).
6. Perform final inspection. Verify that the curvature of the heaters matches the chamber and no gaps exist.
7. Note:
A. Heater may show discoloration due to post production burn in and may smoke slightly for up to two minutes when first installed.
B. After testing the unit, retighten the tie down bands.
C. Excessive tightening of nuts may cause heater to fail.

Tech Tip:  Be sure your original MDT Ritter Castle 1200 Dual Heating Element is defective before replacing it, by performing the following test

Testing The MDT Ritter Castle 1200 Dual Heating Element

This test consists of measuring the amount of resistance in the element. To do this, first, turn the autoclave off and unplug it from the wall

WARNING: CURRENT MUST NOT BE PRESENT WHEN MEASURING RESISTANCE.

Set your volt/ohm meter on 200 ohms (200 NOT 200k). The ohms range is located within the Omega (Ω )(look for this symbol) section of your meter. It is also the area with "k" ranges (ie: 2000k,. 200k, 20K and then 2000, 200).

Place a probe from the volt/ohm meter on each fitting where the wire connects to each element (it really doesn't matter which color probe goes where). 

Note:  The MDT Ritter Castle 1200 Dual Heating Element assembly consists of 2 different heating elements assembled together.  Be sure to check them both & compare them to the ranges in the table below

For the heating elements to be good, they must fall within the resistance range in this table.   If your readings for either element are outside of this range, then it is defective and the entire assembly needs to be replaced.
Model Volts Watts Amps Resistance Resistance Range
MDT Ritter Castle 1200 Dual Heating Element 120v 1350 Watts 11.250 amps ~10.0 Ohms 9.00 11.00 ohms
MDT Ritter Castle 1200 Dual Heating Element 120v 100Watts 00.833 amps ~144 Ohms 129.6158.4 ohms


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