FIELD CONTROLS ESU14 User's Manual
Contents
1. Field Controls Inc All Rights Reserved Field Controls Inc 2630 Airport Road Kinston NC 28504 PH 252 522 3031 FAX 252 522 0214 32. APPLICATION NOUE AN 137 Replacement Instructions for Models ESU14 amp ESU20 SUPPLEMENT TO THE ELECTRONIC STEAM FIELD CONTROLS 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 MODEL S2000 amp 2020 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 Ia CUT ON LINE 3 CUT OUT SOLID LINE AREA AS MARKED 4 MOUNT HUMIDIFIER PER INSTRUCTIONS F CUT ON LINE E FIG 4 With this modification done you should
3. 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 1s 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 1 APPLICATION NOUE AN 137 Replacement Instructions for Models ESU14 amp ESU20 SUPPLEMENT TO THE ELECTRONIC STEAM F E L D C O N T R O L S POWER HUMIDIFIERS MODEL S2000 AND S2020 Field Controls Humidifiers 2 WIRING Another important difference in the replacement of an ESU model with a new S series humidifier is the wiring connections On the ESU the humidity control was connected to the two WHITE wires on the molded plug When upgrading to the S series simply cut the two white wires and connect them to the two H terminals on the top of the front cover The blower fan interlock was connected via the two red w
4. difiers 3 DRAINS Itis still necessary to run an overflow drain line from the humidifier to a suitable drain Now it is also required to run an additional drain line from the new automatic drain valve to a suitable drain The new S series humidifiers have an automatic drain valve which will drain the tank every 12 hours to minimize chemical buildup inside the tank The water is allowed to cool down to 140 degrees F before the water 1s drained out The humidifier drains by gravity only so it must be mounted at a sufficient height to allow for proper drainage DO NOT route the drain hoses above the level of the humidifier and watch for kinks or cuts in the hoses If you have a basement installation and require draining into a condensate pump we recommend a Beckett Model CU451ULHT or CU551ULHT These pumps are rated for high temperature water and have built in check valves 4 WAIER The frequency which the water fill solenoid on the new steam unit will activate can exceed the older model This more frequent filling of the tank may be noticeable in the form of water hammer noise or spikes in the water line Install an optional water hammer arrester WH 100 and the noise will dissipate If this Engineering notice does not cover a question or issue that you have encountered during your installation or replacement project please contact the Technical Support Hotline 1 800 446 3110 P N 090376A0137 REV D 10 2011 Copyright 2011
5. ires on the old ESU model and usually incorporated a field installed transformer and interlocking relay Just cut the two red wires and connect them to the R and G2 terminals on the top of the front cover In this method you can reuse the field relay and transformer which were originally installed with the ESU If this is a new install then you can fully utilize the on board relay provided with the S series humidifier and interlock your blower fan by following the low voltage diagram There is no need to install a separate transformer or relay S 2000 amp S2020 T ypicd Wiring ond Blowe Inte lock Diag am S2000 amp S2020 Humidifier Typical E H Thermostat R W G Y Humidistat H ect amp Cod Systeam DO NOT plug the molex connector from the old ESU humidifier into the socket on the side of the front cover on the new S series humidifier That socket connection is now reserved for the automatic drain valve only Doing so will damage the unit and void the warranty 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 P APPLICATION NOUE AN 137 Replacement Instructions for Models ESU14 amp ESU20 SUPPLEMENT TO THE ELECTRONIC STEAM FIELD CONTROLS POWER HUMIDIFIERS MODEL S2000 AND S2020 Field Controls Humi
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