How To Install The Midmark M7 Heating Element

A. Removal

Warning: Always unplug the power cord from the wall outlet before removing any of the sterilizers cover / panels or making any repairs to prevent the possibility of electrical shock. Failure to comply with these instructions could result in severe personal injury or death.

1. Disconnect power cord from wall outlet.
2. Unscrew drain (1, Figure 4-6) and drain all water from condensing tank.
3. Remove wire rack and trays (Refer to para 4.20).
4. Lay unit onto its side.
5. Remove two screws (2) and inspection cover (3) from base (4).
6. Taking care not to kink rod (5), flex rod and remove it from rocker bracket (6).
   
   
   
   Figure 4-6. Inspection Cover Removal / Installation
   
   
   
7. Tag and disconnect four wires (7) from terminals of heating element (8).
   
   NOTE: Step 8 applies only to units which have an old style heating element. Units with a new style heating element have built in terminals.
   
   
8. If unit has an old style heating element, remove nut (1), two terminals (2), and nut (3) from each terminal post of heating element (4). Discard nuts and terminals - will receive new style heating element.
9. Remove two nuts (1, Figure 4-8), lockwashers (2), and washers (3) from terminal posts of heating element (4).
10. Pull bracket (5) off of terminal posts of heating element (4).
11. Remove heating element (4) and spacer (6)from inside of chamber.
12. Remove one gasket (7) from each terminal post of heating element (4).

B. Installation

1. Install one gasket (7, Figure 4-8) on each terminal post of heating element (4).
   
   CAUTION: Hold heating element firmly in position while tightening nuts. Otherwise, damage to heating element or improper positioning of heating element may result. Also, spacer must remain above gaskets. If spacer is installed under gasket, leaking will result.
   
   NOTE: Flat side of nut should be facing lockwasher.
   
   
2. Install spacer (6) and heating element (4) on chamber wall and secure with bracket (5), two washers (3), lockwashers (2), and nuts (1).
3. Connect four wires (7, Figure 4-6) to terminals of heating element (8).
4. Taking care not to kink rod (5), flex rod and insert it into rocker bracket (6).
5. Install inspection cover (3) on base (4) and secure with two screws (2).
6. Turn unit upright.
7. Install wire rack and trays (Refer to para 4.20).
8. Tighten drain (1).
9. Connect power cord to wall outlet.
10. Fill condensing tank with distilled or demineralized water