Installation Sheets Manual 121 Pressure Controls Section P Application Note Issue Date 0414 APPLICATION NOTE Installing the External Potentiometer Replacement Cover The external potentiometer replacement cover (VFD66-CVR-1C) is an accessory that facilitates adjusting the potentiometers without removing the terminal access cover each time a potentiometer adjustment is desired. The replacement cover may be used on VFD66 controls with a NEMA 1 enclosure and without an alarm board. WARNING: Risk of Electrical Shock. Disconnect the power supply before making electrical connections. The printed circuit board and its components are at AC line voltage. Contact with components carrying hazardous voltage can cause electric shock and may result in personal injury or death. ADVERTISSMENT: Risque de décharge électrique. Débrancher l'alimentation avant de réaliser tout branchement électrique. Le circuit imprimé et ses composants présentent une tension CA. Tout contact avec des composants conducteurs de tensions dangereuses risque d'entraîner une décharge électrique et de provoquer des blessures graves, voire mortelles. CAUTION: Risk of Equipment Damage. Before connecting power to the VFD66 control, check for proper wire and terminal plug placement. Improper electrical connections may damage the monitor. MISE EN GARDE: Risque de dégâts matériels. Vérifier le positionnement correct des fils et de la fiche de raccordement avant de connecter l'[appareil] à l'alimentation électrique. Des connexions électriques incorrectes risquent d'endommager le moniteur. © 2014 Johnson Controls, Inc. Part No. 24-7664-1970, Rev. A Code No. LIT-121419 Use these instructions to install the cover. Refer to Figures 1 and 2. 1. Disconnect power from the VFD66 control. 2. Wait five minutes for the capacitors to discharge before continuing. 3. Remove the terminal access cover from the VFD66 control. 4. Remove the control cover by unscrewing the four cover screws and lifting the cover off the control. (See Figure 1.) 5. Replace the control cover with the external potentiometer kit cover. 6. Completely remove the jumpers on Jumper Blocks J5 and J6. Do not discard these jumpers if there is any possibility of using the internal potentiometers at some time in the future. 7. Connect the external potentiometers to the appropriate 4-pin jumper block using the connectors provided. • External P1 connects to J5 • External P2 connects to J6. Note that the red wire on both potentiometer harnesses must connect to Pin 4 on the appropriate jumper block. Pin 4 is the pin closest to the internal potentiometers P1 and P2. See the detail in Figure 2. 8. Replace the terminal access cover. 9. Reconnect power to the VFD66 control. Note: When external potentiometers are installed, the internal potentiometers are disabled. R epairs and Replacement Field repairs of the External Potentiometer Replacement Cover cannot be made. For a replacement control, contact your local Johnson Controls/PENN distributor. 1 www.johnsoncontrols.com Control Cover Ventilation Holes Diagnostic Display Terminal Access Cover Terminal Cover Screw Conduit Openings Control Cover Screws Heat Sink Figure 1: VFD66 Condenser Fan Speed Control with Standard NEMA 1 Cover Replacement Cover External P1 External P2 Terminal Access Cover PO WE R AL A P1 Connector RM Detail P2 Connector Black P1 or P2 Connector Blue Red Pin 4 Jumper Block J5 or J6 Internal P2 Internal P1 J6 J5 Internal Potentiometer P1 or P2 Figure 2: Installing an External Potentiometer Replacement Cover Building Efficiency 507 E. Michigan Street, Milwaukee, WI 53202 ® Johnson Controls and PENN are registered trademarks of Johnson Controls, Inc. in the United States of America and/or other countries. All other trademarks used herein are the property of their respective owners. © Copyright 2014 by Johnson Controls, Inc. All rights reserved. 2 P—Installing the External Potentiometer Replacement Cover