Carrier WeatherExpert 48N2 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for WeatherExpert 48N2: Installation instructions Installation instructions Controls, start-up, operation, service, and troubleshooting Installation instructions

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Carrier WeatherExpert 48N2 Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 5 page image

5force by selecting the point that is forced with the ENTER keyand then pressing both arrow keys simultaneously.Depending on the unit model, factory-installed options andfield-installed accessories, some of the items in the variousmode categories may not apply.Conventions Used in This Manual — This manualwill use the following conventions for discussing configurationpoints for the local display (Navigator™).Parameter names will be written with the Mode name first,then any sub-modes, then the parameter name, each separatedby an arrow symbol (). Names will also be shown in boldand italics. As an example, the IAQ Economizer Override Po-sition which is located in the Configuration mode, Indoor AirQuality Configuration sub-mode, and the Air Quality SetPoints sub-sub-mode, would be written as ConfigurationIAQIAQ.SPIQ.O.P.This path name will show the user how to navigate throughthe local display structure to reach the desired configuration.The user would scroll through the modes and sub-modes usingthe UP ARROW and DOWN ARROW keys. The arrow sym-bol in the path name represents pressing ENTER to move intothe next level of the menu structure.When a value is included as part of the path name, it will beshown at the end of the path name after an equals sign. If thevalue represents a configuration setting, an explanation will beshown in parenthesis after the value. As an example, Configu-rationIAQAQ.CFIQ.AC = 1 (IAQ Analog Input).Pressing the ESCAPE and ENTER keys simultaneouslywill display an expanded text description of the parametername. The expanded description is shown in the local displaytables but will not be shown with the path names in text.The CCN (Carrier Comfort Network®) point names are alsocross-referenced in the local display tables (Appendix A) forusers interface with the unit via CCN instead of the local dis-play. The CCN tables are located in Appendix B of thismanual.System Pilot™ Interface — The System Pilot inter-face (33PILOT-01) is a component of the Carrier 3V™ systemand can serve as a CCN user-interface and configuration tool.Additionally, the System Pilot interface can serve as a wall-mounted temperature sensor for space temperature measure-ment. The occupant can use the System Pilot interface tochange set points. A security feature is provided to limit accessof features for unauthorized users. See Fig. 2 for System Pilotinterface details.CCN Tables and Display — In addition to the Naviga-tor display, the user can also access the same informationthrough the CCN tables by using the System Pilot, ServiceTool or other CCN programs. Details on the CCN tables aresummarized in Appendix B. The point names displayed in theCCN tables and the corresponding local display acronymsavailable via the Navigator display may be different and moreitems are displayed in the CCN tables. As a reference, the CCNpoint names are included in the local display menus shown inAppendix A.GENERIC STATUS DISPLAY TABLE — The GENERICSpoints table allows the service/installer the ability to create a cus-tom table in which up to 20 points from the 5 CCN categories(Status, Config/Service-Config, Set Point, Maintenance, and Oc-cupancy) may be collected and displayed.In the Service-Config table section, there is a table named"generics." This table contains placeholders for up to 20 CCNpoint names and allows the user to decide which points are dis-played in the GENERIC points table. Each one of these place-holders allows the input of an 8-character ASCII string.Using a CCN method of interface, go into the Edit mode forthe Service-Config table "generics" and enter the CCN name foreach point to be displayed in the custom points table in the orderthey will be displayed. When done entering point names, down-load the table to the rooftop unit control.START-UPUnit Preparation — Check that unit has been installed inaccordance with the installation instructions and applicablecodes. Make sure that the economizer hoods have been in-stalled and that the outdoor filters are properly installed.Internal Wiring — Ensure that all electrical connectionsin the control box are tightened as required. If the unit has mod-ulating gas or SCR electric heat make sure that the LAT (leav-ing air temperature) sensors have been routed to the supplyducts as required.IMPORTANT: The computer system software (Com-fortVIEW™, Service Tool, etc.) that is used to interactwith CCN controls always saves a template of items itconsiders as static (e.g., limits, units, forcibility, 24-character text strings, and point names) after the soft-ware uploads the tables from a control. Thereafter, thesoftware is only concerned with run time data likevalue and hardware/force status. With this in mind, itis important that anytime a change is made to the Ser-vice-Config table "generics" (which in turn changesthe points contained in the GENERIC point table), thata complete new upload be performed. This requiresthat any previous table database be completelyremoved first. Failure to do this will not allow theuser to display the new points that have been createdand the software will have a different table databasethan the unit control.IMPORTANT: Do not attempt to start unit, evenmomentarily, until all items on the Start-Up Checklist(at the back of this book) and the following steps havebeen completed.IMPORTANT: The unit is shipped with the unit controldisabled. To enable the control, set Local Machine Disable(Service TestSTOP) to No.SCROLL +-NAVIGATE/EXITMODIFY/SELECTPAGEFig. 2 — System Pilot User Interface