Carrier 50TCQA Installation Instructions Manual

Also see for 48TC*D: Service and maintenance instructions Installation instructions

Contents

16TRACKFLANGEC08135Fig. 25 -- Typical Module InstallationSingle Point Boxes and Supplementary Fuses — Whenthe unit MOCP device value exceeds 60--A, unit--mountedsupplementary fuses are required for each heater circuit.These fuses are included in accessory Single Point Boxes,with power distribution and fuse blocks. The single pointbox will be installed directly under the unit control box,just to the left of the partition separating the indoorsection (with electric heaters) from the outdoor section.The Single Point Box has a hinged access cover. SeeFig. 26. The Single Point Box also includes pigtails tocomplete the wiring between the Single Point Box and theunit’s main control box terminals. Refer to the accessoryheater and Single Point Box installation instructions fordetails on tap connections.ALLIED PAMODEL NO.ERIAL NO.CORP.11 1321 23OD22.23123ISTED AIRNDITIONINGUIP ACCESS346N.P / N 2- 5610-4 REV11 1321 23CONTROLBOXBUSHINGSINGLEPOINT BOXMOUNTINGSCREWSFOAMBUSHINGDRIP BOOTBRACKETMOUNTINGSCREWSHEATERRELAYSPOWERWIRESHEATERMOUNTINGSCREWSC08136Fig. 26 -- Typical Single Point InstallationAll fuses on 50TCQ units are 60--A. (Note that all heatersare qualified for use with a 60--A fuse, regardless of actualheater ampacity, so only 60--A fuses are necessary.)Single Point Boxes without Fuses — Refer to accessoryheater and Single Point Box installation instructions fordetails on tap connections.Low--Voltage Control Connections — Run thelow--voltage control leads from the heater module(s) --VIO and BRN (two of each if two modules are installed;identify for Module #1) -- to the 4--pole terminal boardTB4 located on the heater bulkhead to the left of Heater#1. Connect the VIO leads from Heater #1 and Heater #2to terminal TB4--1. Connect the BRN leads to terminalTB4--3. See Fig. 27.DEFROSTBOARDORNBRNFieldConnectionsE-HEATP3-31 3ORN BRNVIO BRN BRNVIOTB4VIO HR2HR1BRNVIO BRNElec HtrHR1: On Heater 1 in Position #1HR2: On Heater 2 in Position #2 (if installed)C09013Fig. 27 -- Accessory Electric Heater Control Connections50TCQA