Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 42S, 42C, 42D, 42V specifications a42-4067

Models: 42V 42D 42S 42C

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a42-4067

a42-4067

NEC CLASS 2 WIRING

Fig. 60 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with

Auxiliary Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v)

Thermostat 2-Pipe Total Electric Heat with Valve Con- trol — With this system, the complete heating requirement for the space is provided by the electric heater; the water system is never changed over for heating. It is therefore possible, just as with 4-pipe systems, to have heating or cooling at any time of the year.

The fan runs continuously unless it is manually switched to OFF position. Fan must be on before thermostat can send signal to open chilled water valve or turn on electric heater.

Normally, an automatic changeover thermostat with a dead band between heating and cooling is used, but a manual changeover thermostat is also suitable. A 2-way or 3-way valve must also be used so that the chilled water is off whenever the heater is on. No changeover device to sense water temperature is necessary.

NOTE: Wiring diagrams are for 120-v power supply. If other voltages for heaters or controls are specified, wiring may differ from that shown. See Fig. 61 and 62 for line voltage control. See Fig. 63 and 64 for 24-v control.

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Carrier 42S, 42C, 42D, 42V specifications a42-4067

Contents

42C,D,S,V Series Fan Coil Air Conditioners Installation, Start-Upand Service InstructionsTable 2 — Physical Data — 42V Series Units Table 1 — Physical Data — 42C Series UnitsPRE-INSTALLATION Fig. 1 — 42CA Furred-InHorizontal Unit Dimensions UNIT a42-4101 A42-4102 A42-4103 A42-4104 A42-4105 Fig. 7 - 42CG Horizontal Cabinet Unit DimensionsLEGEND 1 — Junction Box, 4 in. x 4 in A42-4149 Front Supply, and Bottom Return Dimensionsa42-4150 a42-4151 Front Supply, and Rear Return Dimensionsa42-4152 Front Supply, Rear Return, and Heater DimensionsUNIT UNIT SIZE Fig. 15 — 42VA Furred-InVertical Unit Dimensions Fig. 16 - 42VB Vertical Cabinet Unit Dimensions LEGEND 1 — Standard Stamped Supply Grille Fig. 18 - 42VC Furred-InLowboy Unit Dimensions LEGEND 1 — Unit-MountedControl Box Optional Fig. 20 — 42VE Cabinet Lowboy Unit Dimensions LEGEND A42-4116 Fig. 22 — 42VG Furred-InWall Unit Dimensionsa42-4120 A42-4121 Blower A42-4122Motor Blower A42-4123Motor A42-4124 A42-4125 Fig. 28 — 42SG Furred-InStack DimensionsA42-4126 Fig. 29 — 42SH Cabinet DimensionsA42-4127 A42-4128 Fig. 31 - 42SGM Furred-InMaster Stack DimensionsA42-4129 Fig. 32 — 42SGS Furred-InSlave Stack Dimensionsa42-4154 a42-4155 a42-4169 a42-4167A42-4173 A42-4171A42-4168 PANEL AND FRAME DIMENSIONS inA42-4170 A42-4161INSTALLATION Step 1 — Place Units in Position Fig. 38 — 42SJ Unit as Shipped Fig. 39 — 42SJ Unit InstallationFig. 37 — 42SJ Unit with Standard and Siamese Risers7.Attach unit risers Fig. 41 — Pipe Connection Configurations Field Piping Connections Hydronic Coil Arrangement42VG a42-4177Fig. 43 — Symbols and Placement of Valves Fig. 44 — Two-WayMotorized Control Valve Package a42-4174a42-4175 COILCOIL a42-4176COIL COILCOIL COILCOIL COIL42D Unit Shown Fig. 48 - Typical Drain Line DetailsTable 5 — Piping Components Table 5 — Piping Components cont Table 5 - Piping Components cont SYMBOL/SKETCHTable 5 — Piping Components cont SYMBOL/SKETCHJOINT MATERIALS Fig. 50 — Manual Fan Control Fig. 51 — Thermostatic Fan Control 2-PipeSystem Remote/Wall-MountedThermostat Line Voltage a42-4060Unit-MountedDebonair Thermostat 24-v,Duct Sensor a42-4059a42-4061 Unit-MountedThermostat Line Voltage a42-4066THERMOSTAT PART # LIMIT SWITCHTHERMOSTAT #33CSSN2-FC VALVEThermostat 2-PipeTotal Electric Heat with Valve Con- trol— With this system, the complete heating requirement for the space is provided by the electric heater; the water system is never changed over for heating. It is therefore possible, just as with 4-pipesystems, to have heating or cooling at any time of the year a42-4067Unit-MountedThermostat Line Voltage a42-4073Remote/Wall-MountedThermostat Line Voltage THERMOSTAT #33CSSN2-FC a42-4072Unit-MountedThermostat Line Voltage a42-4079a42-4078 Remote/Wall-MountedThermostat Line VoltageRemote/Wall-MountedDebonair Thermostat To Clean Coil SERVICEStep 7 — Make Final Preparations START-UPc.Reinstall fan deck if removed Page Catalog No. Copyright 2009 Carrier CorporationPrinted in U.S.A Form 42-3SII.Project Information INSPECTION, INSTALLATION, AND START-UPCHECKLISTFAN AND MOTOR