APPLICATION NOTE
AN 129
HEATING ELEMENT REPLACEMENT INSTRUCTIONS
732-446-5362
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Heating Element Assembly
Parts List:
* 1 - 120 or 220 volt element
* 2 - Fiber washers
* 2 - Metal flat washers
* 2 - Metal hex lock nuts
1. Unplug the power cord from the 120 volt source for the S2000. (240 volt for the S2020).
2. Close the water supply valve and disconnect the 1/4” water supply line.
3. It is assumed the element is faulty and the water is cool, but be careful of hot water!
4. Open the manual drain valve and drain the water tank completely. Have a container ready to catch the water.
5. Disconnect the overflow and drain hoses.
6. Unplug the automatic drain valve from the right side of the front cover, by pressing on the plastic
locking lever and pulling the connector straight out. Use snips or pliers to cut the plastic wire tie.
7. Use an adjustable wrench to unscrew and remove the entire automatic drain valve assembly.
CAUTION: There may still be some water in the tank. Have a container ready to catch the water.
8. Unplug the green low voltage connector hub at the top of the front cover by pulling straight up.
9. The entire unit can now be removed by unscrewing all of the 1/4”hex screws which secure the humidifier
to the duct. Pull the unit straight out or off of the duct, and set it on a flat work table or surface.
10. Remove the 2 phillips screws which hold the stainless steel baffle to the main tank and remove the baffle.
You can now see the entire heating element in full view.
11. Loosen the 4 phillips screws which secure the plastic front cover. Pull and remove the front cover.
12. Use a 5/16” nut driver to remove the nut which secures the water probe to the printed circuit board.
13. Use a phillips screwdriver to remove the ground screw at the top of the printed circuit board, and the
two small screws at the bottom corners.
14. The printed circuit board is now loose enough to be moved up slightly. Be careful not to damage it.
15. Use needle nose pliers to grasp and pull off the blue and yellow insulated wire connectors at the
heating element connections.
16. Use the 3/4” wrench or socket to loosen and remove the hex lock nuts, which secure the heating element.
17. It will be necessary to use pliers and unbend the 90° spade connectors to a 45° angle to allow the use of
the deep well socket and ease the removal of the old element through the holes in the tank. Remove the
flat washers and pull out the old element.
Required tools and materials:
* 3/4” deep well socket
* Torque wrench
* 3/4” open end wrench
* 1/2” open end wrench
* Phillips & standard screwdrivers
* 1/4” & 5/16” nut drivers
* Needle nose pliers
* Adjustable wrench 8”
* Drain bucket
1
REPAIRS SHOULD BE PERFORMED
BY A QUALIFIED TECHNICIAN
C
E
W
CONTROLS INC.
Excellence Without Compromis
e
INSTALLATION INSTRUCTIONS & OWNER'S MANUAL
HEATING ELEMENT REPLACEMENT INSTRUCTIONS
SUPPLEMENT TO THE ELECTRONIC STEAM POWER HUMIDIFIERS
Field Controls Humidifiers
P/N 090376A0129 REV. F 10/2011 Copyright © 2011, Field Controls Inc., All Rights Reserved
Field Controls Inc. 2630 Airport Road Kinston, NC 28504 PH: 252.522.3031 FAX: 252.522.0214
(1 pages)
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