Carrier 42 SERIES specifications Three-Way Motorized Control Valve, No Motorized Control Valve

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Three-Way Motorized Control Valve

On the 3-way motorized valve ¯ow is normally closed to coil and open to system return. Motor closes bypass ¯ow to system return while opening ¯ow through coil. Water bypasses coil and ¯ows directly to system return when unit is OFF.

The aquastat (A) clips on supply line upstream from

3-way valve (as shown above). It senses system water temperature to prevent cooling operation with hot wa- ter in system piping or heating operation with chilled wa- ter in system piping. Aquastat(s) required for 2-pipe cooling and heating with automatic changeover control and/or auxiliary electric heat.

A bypass balancing valve may be speci®ed in the by- pass line to permit equal ¯ow balancing.

Supply and return connections at coil will be swage ®t for ®eld braze (standard) or unions (option).

Check job speci®cations for system pressure, pres- sure drop limitations and ¯ow rate prior to selecting valve package components or valve package size (1¤2 , 3¤4 , etc.).

2-PIPE SYSTEM (One Valve Package) or 4-PIPE SYS- TEM (Two Valve Packages) Application:

·2 Pipe - Hydronic Heating Only

·2 Pipe - Hydronic Cooling Only

·2 Pipe - Hydronic Cooling with Total Electric Heat

·2 Pipe - Hydronic Cooling and Heating

·2 Pipe - Hydronic Cooling and Heating with Auxiliary Electric Heat

·4 Pipe - Hydronic Cooling and Heating

No Motorized Control Valve

When isolation valves only are speci®ed, they will be brazed to the coil stub-outs.

Check job speci®cations for system pressure, pres- sure drop limitations and ¯ow rate prior to selecting spe- ci®c components or valve package size 1(¤2 , 3¤4 , etc.).

2-PIPE SYSTEM ONLY (One Valve Package) Application:

·2 Pipe - Hydronic Heating Only

·2 Pipe - Hydronic Cooling Only

NOTES:

1.Continuous water ¯ow, chilled water or hot water.

2.Not recommended for high humidity applications.

3.Not recommended with unit-mounted thermostat on vertical units (except package R).

4.The addition of any other component(s) will require swage ®tting for ®eld braze or optional union conec- tion.

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Contents Application Data Contents Pipe Control Selection GuideThermostatic Fan Control, 2-Pipe Systems Ð Standard Wiring PackagesOnly Thermostatic Electric Valve Control, 2-Pipe ÐUnit Location Wiring Package Electric Type Unit Location Wiring Package Electric Type Unit Type Location Wiring Package Electric Heater Construction Electric HeatHeater Electrical Data REMOTE-MOUNTED Controls Combination Thermostat/3-Speed SwitchThermostat Electrical Data Pilot Duty Ð 125 VA Thermostat Electrical Ratings Amperes Thermostat Valve Load Fan SwitchThermostat and Fan Switch Electrical Ratings Alternate Wall ThermostatsUNIT-MOUNTED Controls Combination Thermostat/ON-OFF Toggle SwitchMED Thermostat Electrical Data Pilot Duty Ð 125 VA at 120-277 Standard 2-pipe units will be the same end connection Basic DefinitionsField Piping Connections Hydronic Coil ArrangementValve Packages Symbol And Placement Of ValvesPage Valve Packages Two-Way Motorized Control Valve No Motorized Control Valve Three-Way Motorized Control ValveValve Package Arrangements Page Description Valve Package ArrangementsCapacity Acceptable Field-Furnished Pneumatic ValvesPiping Components SYMBOL/SKETCH Description CV Factor Rating Steam PSI USEHayes Compression Stop Valve Piping ComponentsWAY Pneumatic Valve SYMBOL/SKETCH Description CV Factor Rating SteamUSE WAY Motorized Valve ElectricGraph Example CV Factor vs Water Pressure DropFormula Example Page Joint Materials Copper Water Tube and Joint Material Pressure RatingsEquivalent water ¯ow method for all 42 Series Models Correction Factors for GlycolExample Cabinet Changes Standard Accessories and Options

42 SERIES specifications

The Carrier 42 SERIES represents a cutting-edge solution in the realm of HVAC systems, meticulously designed to provide efficient heating, cooling, and ventilation for residential and commercial spaces. Known for their reliability and superior performance, these units combine advanced technologies with user-friendly features, catering to diverse climate needs.

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