Carrier 42 SERIES Manuel d'utilisateur

Application DataControl Selection Guidefor Fan Coil Air Conditioners42 SeriesFan Coil UnitsManufacturer reserves the right to discontinue, or change a

REMOTE-MOUNTED CONTROLSStandard 3-Speed Switch —This standard switchhas 4 positions: OFF, HIGH, MEDIUM, and LOW. Switchhas auxiliary contact that is e

ALTERNATE WALL THERMOSTATSWall Thermostat (Honeywell Model T4039) withManual 3-Speed Fan Switch and ON-OFF SwitchTemperature range is approximately 55

UNIT-MOUNTED CONTROLSOFFHIMEDLOStandard 3-Speed Switch — Switch has OFF, HIGH,MED and LOW positions. Switch is also equipped with aux-iliary connectio

Two-Pipe Thermostat, Model TF103 — This single-pole, double-throw (SPDT) thermostat has snap-action con-tacts. The standard temperature range is 60 -

BASIC DEFINITIONSUnit Hand — When facing the supply air outlet from the front of the unit (air blow-ing in your face), your right hand will be the rig

Hydronic Coil ArrangementFIELD PIPING CONNECTIONS*VERTICAL FLOOR UNITS — 42VB, VE, VFPipe into cabinet end compartment(opening in bottom and back).VER

VALVE PACKAGESGeneral —Table 1 lists acceptable pneumatic valves forinstallation on 42 series fan coil units. There are limitationson physical size of

LEGEND For Fig. 1Component Sizing —1⁄29 nominal (for5⁄89 OD copper tubing) or3⁄49 nominal (for7⁄89 OD copper tubing).Manual Air Vent — Standard compon

VALVE PACKAGES (cont)Two-Way Motorized Control ValveThe 2-way motorized valve motor drives valve openand a spring returns valve to normally closed pos

Three-Way Motorized Control ValveOn the 3-way motorized valve flow is normally closedto coil and open to system return. Motor closes bypassflow to syste

CONTENTSPageCONTROL SELECTION GUIDE ... 3STANDARD WIRING PACKAGES ... 4-8Manual Fan Control ... 4Thermostat

VALVE PACKAGE ARRANGEMENTS20

LEGEND— Ball Valve— Ball Valve with Memory Stop— Gate Shut Off Valve— Balancing Valve— Circuit Setter— Motorized 2-Way Valve— Motorized 3-Way Valve* W

VALVE PACKAGE ARRANGEMENTS (cont)LEGENDITEM DESCRIPTIONPneumatic Control Valve, 2-WayCode 18(typical) -2* (1⁄2-or5⁄8-in. ODF tubing conn) orCode 18(ty

Table 1 — Acceptable Field-Furnished Pneumatic ValvesMANUFACTURER VALVE NUMBER TYPE MODESIZE (in.)(OD Male Flare)CAPACITY(CV) RATINGHONEYWELLVP517A 3-

PIPING COMPONENTSSYMBOL/SKETCH DESCRIPTIONCVFACTOR RATINGSTEAMUSE1⁄23⁄4PSI FMANUAL AIR VENT: Threaded brassneedle valve with screwdriver slotfor adjus

SYMBOL/SKETCH DESCRIPTIONCVFACTOR RATINGSTEAMUSE1⁄23⁄4PSI FPRESSURE TEST PORT: Brass body1⁄4service access fitting withremovable depressor type core.Ap

PIPING COMPONENTS (cont)SYMBOL/SKETCH DESCRIPTIONCVFACTOR RATINGSTEAMUSE1⁄23⁄4PSI FSTRAINER: Y-type body with50 mesh stainless steel screen.Applicatio

SYMBOL/SKETCH DESCRIPTIONCVFACTOR RATINGSTEAMUSE1⁄23⁄4PSI F2-WAY MOTORIZED VALVE: Electric2-position flow control valve(open/closed). Normally-closed b

CVFACTOR vs WATER PRESSURE DROPCVFACTOR:The flow rate in gallons per minute (gpm) through a piping component when the pressure drop (DP) in pounds pers

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CONTROL SELECTION GUIDEUse this guide to make sure that all necessary components are provided for and that the components are compatiblewith the requi

COPPER WATER TUBE AND JOINT MATERIAL PRESSURE RATINGSJOINT MATERIALSA 50-50 Lead-Tin at 200 FNote 1D 95-5 Tin-Antimony at 200 FNote 2B 50-50 Lead-Tin

CORRECTION FACTORS FOR GLYCOL(Equivalent water flow method for all 42 Series Models)This method allows you to calculate cooling and heating performance

Table 2 — Standard Accessories and OptionsSTANDARD ACCESSORIESAND OPTIONSUNIT SERIES — 42Ceiling — Horizontal Floor — Vertical Ducted — HorizontalBelt

STANDARD WIRING PACKAGESIMPORTANT: Wiring diagrams shown depict typicalcontrol functions. Refer to unit wiring label for spe-cific functions.Manual Fan

Thermostatic Fan Control, 2-Pipe System withSafety Cycle —This control is used for high humiditysituations in which condensate problems can occur if f

STANDARD WIRING PACKAGES (cont)Thermostatic 2-Pipe Auxiliary Electric Heatwith Valve Control —This system, also called Twi-light or Intermediate Seaso

Thermostatic 2-Pipe Total Electric Heat with-Valve Control —With this system, the complete heat-ing requirement for the space is provided by the elect

STANDARD WIRING PACKAGES (cont)Thermostatic Valve Control, 4-Pipe —The 4-pipesystem provides the ultimate in economy and room tem-perature control. Bo

ELECTRIC HEATApplication —Electric heaters are available forin-stallation on Carrier fan coil units in the followingapplications.TOTAL ELECTRIC HEAT —