Carrier 48NP Installation Instructions Manual
Also see for 48NP: Installation, Start-Up and Service Instructions
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Installation InstructionsGENERALThe accessory refrigerant pressure transducer and suc-tion superheat package is intended for use with the48NP/50NB,NP units only. When installed using these in-stallation instructions, this accessory package will improvehead pressure control, as well as provide increased diagnos-tic capability by monitoring compressor discharge and suc-tion pressures and suction superheat. See Package Contentstable and Fig. 1 for package contents.Installation of the discharge pressure transducers in thiskit will replace the function of the saturated condensing tem-perature thermistors (T3 and T4), and installation of the suc-tion pressure transducers will replace the function of the low-pressure switches. The control will no longer require inputsfrom these thermistors and switches once this installation iscomplete.IMPORTANT: The PSIO2 accessory package number50DJ902431 must also be installed in order to providesuction superheat monitoring.PACKAGE CONTENTSITEM QUANTITY*Thermistor 2Transducer 4Compression Fitting 2Wire Nuts (2 types) 13PSIO1 Plug Assembly 1Transducer Plug Harness 4Connection Box 2Connection Box Cover 2Connection Box Connector 4Connection Box Bracket 1PVC-Jacketed Cable 28 ftRed and Black Wire Assembly 2Varnish Cloth 4Wire Tie 2Screw 2*Not all items will be used in each installation. Refer to the Installationsection for the items and quantities required for each individual in-stallation. Extra parts not needed may be discarded.TRANSDUCER1/4-IN. FEMALE QUICK CONNECTSRED AND BLACKWIRES (USEDFOR 034-074UNITS ONLY)PSIO PLUGASSEMBLYPVC-JACKETED CABLETRANSDUCER PLUG HARNESSLEAD ENDTHERMISTORPROBE ENDCOMPRESSIONFITTINGWIRE NUTSNOTE: Screws, varnish cloth, connectors, connection boxes andcovers, and connection box mounting bracket not shown.Fig. 1 — Package Contents48NP/50NB,NPAccessory Pressure TransducerManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 1Tab 1a 1bPC 111 Catalog No. 564-923 Printed in U.S.A. Form 48/50N-1SI Pg 1 12-93 Replaces: New |
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