AN-137 Replacement Instructions for
Models ESU14 & ESU20
SUPPLEMENT TO THE ELECTRONIC STEAM
POWER HUMIDIFIERS MODEL #S2000 AND S2020
Field Controls Humidifiers
This service bulletin describes the steps that may be necessary to replace your existing Model ESU14 or ESU20 Steam Humidifier, with the new Model S2000 or S2020 Power Steam Humidifier. The new “S” models have been redesigned and improved. There are some differences which must be taken into account when installing this unit or replacing an older model.
1. MOUNTING - First and most important is the mounting of the new humidifier. The new model has a larger reservoir but measures the same width and height as the old “ESU”. The reservoir protrudes deeper into the duct and occupies more space inside the duct. The new “Under Duct Mounting Flange” is an integral part of the reservoir. As a result, the modification to perform when mounting the new S2000 or S2020, is to snip and lengthen the flange dimension on your existing reservoir cutout opening in the warm air supply plenum.
CUT ON LINE
MOUNTING TEMPLATE
CUT ON LINE
MODEL S2000& S2020
1.TAPE TEMPLATE IN LEVEL POSITION.
2.DRILL (8) HOLES FOR SHEET METAL SCREWS SHOWN ON TEMPLATE (DO NOT DRILL LARGER THAN 1/8" DIAMETER.
3.CUT OUT SOLID LINE AREA AS MARKED.
4.MOUNT HUMIDIFIER PER INSTRUCTIONS.
CUT ON LINE
CUT ON LINE
FIG. 4
P/N 094021B0037
With this modification done, you should be able to insert the new humidifier into the cutout opening and secure the unit with the 8 self tapping screws provided. The hole dimensions on the front plate have not changed and should match up. If necessary, locally reinforce the opening with sheet metal sleeves to insure that the unit will remain level and not sag with the added weight of the water.
A 2nd template is included with the “S” series humidifiers for mounting the unit under the duct on the return or cold air side of the furnace. Note that there is no need to order an under the duct mounting kit, due to the new integrated mounting flange.
P/N 090376A0137 | REV. D 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 | |
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