Carrier 42 SERIES Application Data

STANDARD WIRING PACKAGESIMPORTANT: Wiring diagrams shown depict typicalcontrol functions. Refer to unit wiring label for spe-cific functions.Manual Fan Control — On all Vertical Cabinet units,the standard fan-speed switch is furnished unit-mounted andwired. On all Vertical Furred-In units and all Horizontal units,the switch is shipped separately on a decorative wall platefor field mounting and wiring.The standard switch has LOW, MEDIUM, HIGH and OFFpositions plus an auxilliary contact to energize thermostats,valves, dampers, etc.NOTE: Wiring diagrams are for 120-v power supply. If othervoltages for heaters or controls are specified, wiring may dif-fer from that shown.The standard 3-speed switches are illustrated on page 12(unit mounted) and on page 10 (wall mounted).For NOTES, see below.Thermostatic Fan Control, 2-Pipe Systems —The thermostat cycles the fan on and off from any selectedspeed setting to maintain selected room temperature. Con-trols can be wired for heating-only, cooling-only or for heating/cooling by the addition of an automatic changeover devicethat senses water temperature and changes the action of thethermostat as required.For control package descriptions, see control componentssections entitled Remote-Mounted Controls and Unit-Mounted Controls, pages 10-13.UNITTYPE LOCATIONTHERMOSTAT ORWIRING PACKAGE*Heating orCooling OnlyHeating and CoolingPlus Changeover†Vertical Unit Mounted N/A N/AVerticalorHorizontalWall Mounted 22-C, 22-D22-E, 22-F 22-A, 22-B*Packages listed on current price pages. First 2 digits are itemnumbers.†For alternate thermostat with manual changeover. Refer to currentprice pages.NOTES:1. Motors are thermally protected.2. Use copper conductors only.3. See unit nameplate for power supply. Provide disconnect meansand overload protection as required.4. Unit-mounted thermostats are not recommended for fan controlbecause of poor temperature sensing. Fan control not availableon 42VC,VE Loboy units.4