Carrier 42 SERIES Application Data

CONTENTSPageCONTROL SELECTION GUIDE . . . . . . . . . . . . . . . 3STANDARD WIRING PACKAGES . . . . . . . . . . . . 4-8Manual Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . 4Thermostatic Fan Control,2-Pipe Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Thermostatic Fan Control,2-Pipe System with Safety Cycle . . . . . . . . . . . . 5Thermostatic Electric Valve Control, 2-Pipe . . . 5Thermostatic 2-Pipe Auxiliary Electric Heatwith Valve Control . . . . . . . . . . . . . . . . . . . . . . . . . 6Thermostatic 2-Pipe Total Electric Heatwith Valve Control . . . . . . . . . . . . . . . . . . . . . . . . . 7Thermostatic Valve Control, 4-Pipe . . . . . . . . . . . 8ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Heater Construction . . . . . . . . . . . . . . . . . . . . . . . . . 9Heater Electrical Data . . . . . . . . . . . . . . . . . . . . . . . 9REMOTE-MOUNTED CONTROLS . . . . . . . . . . . . 10Standard 3-Speed Switch . . . . . . . . . . . . . . . . . . . 10Combination Thermostat/3-Speed Switch . . . . 10Wall Thermostat, 2-Pipe . . . . . . . . . . . . . . . . . . . . 10Wall Thermostat, 4-Pipe . . . . . . . . . . . . . . . . . . . . 10ALTERNATE WALL THERMOSTATS . . . . . . . . . 11Wall Thermostat (Honeywell) with Manual3-Speed Fan Switch and ON-OFF Switch . . . 11Wall Thermostat (Sunne) with Manual3-Speed Fan Switch and ON-OFF Switch . . . 11PageUNIT MOUNTED CONTROLS . . . . . . . . . . . . . . 12,13Standard 3-Speed Switch . . . . . . . . . . . . . . . . . . . 12Combination Thermostat/3-Speed Switch . . . . 12Combination Thermostat/ON-OFFToggle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Two-Pipe Thermostat . . . . . . . . . . . . . . . . . . . . . . . 13Four-Pipe Thermostat . . . . . . . . . . . . . . . . . . . . . . 13Automatic Changeover . . . . . . . . . . . . . . . . . . . . . 13BASIC DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . 14FIELD PIPING CONNECTIONS . . . . . . . . . . . . . . 15VALVE PACKAGES . . . . . . . . . . . . . . . . . . . . . . . 16-19General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Two-Way Motorized Control Valve . . . . . . . . . . . 18Two-Way Motorized Control Valvewith Aquastat Bleed Bypass Line . . . . . . . . . . 18Three-Way Motorized Control Valve . . . . . . . . . 19No Motorized Control Valve . . . . . . . . . . . . . . . . . 19VALVE PACKAGE ARRANGEMENTS . . . . . . . 20-23PIPING COMPONENTS . . . . . . . . . . . . . . . . . . . . 24-27Cv FACTOR vs WATER PRESSURE DROP . . . 28SYSTEM COMPONENT WORKINGPRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29COPPER WATER TUBE AND JOINT MATERIALPRESSURE RATINGS . . . . . . . . . . . . . . . . . . . . . 30CORRECTION FACTORS FOR GLYCOL . . . . . . 31STANDARD ACCESSORIES AND OPTIONS . . 322