Contents

Page

CONTROL SELECTION GUIDE . . . . . . . . . . . . . . . 3

STANDARD WIRING PACKAGES . . . . . . . . . . . . 4-8

Manual Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . 4

Thermostatic Fan Control,

2-Pipe Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Thermostatic Fan Control,

2-Pipe System with Safety Cycle . . . . . . . . . . . . 5 Thermostatic Electric Valve Control, 2-Pipe . . . 5

Thermostatic 2-Pipe Auxiliary Electric Heat with Valve Control . . . . . . . . . . . . . . . . . . . . . . . . . 6

Thermostatic 2-Pipe Total Electric Heat

with Valve Control . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermostatic Valve Control, 4-Pipe . . . . . . . . . . . 8

ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Heater Construction . . . . . . . . . . . . . . . . . . . . . . . . . 9

Heater Electrical Data . . . . . . . . . . . . . . . . . . . . . . . 9

REMOTE-MOUNTED CONTROLS . . . . . . . . . . . . 10

Standard 3-Speed Switch . . . . . . . . . . . . . . . . . . . 10

Combination Thermostat/3-Speed Switch . . . . 10

Wall Thermostat, 2-Pipe . . . . . . . . . . . . . . . . . . . . 10

Wall Thermostat, 4-Pipe . . . . . . . . . . . . . . . . . . . . 10

ALTERNATE WALL THERMOSTATS . . . . . . . . . 11

Wall Thermostat (Honeywell) with Manual 3-Speed Fan Switch and ON-OFF Switch . . . 11

Wall Thermostat (Sunne) with Manual

3-Speed Fan Switch and ON-OFF Switch . . . 11

Page

UNIT MOUNTED CONTROLS . . . . . . . . . . . . . . 12,13

Standard 3-Speed Switch . . . . . . . . . . . . . . . . . . . 12

Combination Thermostat/3-Speed Switch . . . . 12

Combination Thermostat/ON-OFF

Toggle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Two-Pipe Thermostat . . . . . . . . . . . . . . . . . . . . . . . 13

Four-Pipe Thermostat . . . . . . . . . . . . . . . . . . . . . . 13

Automatic Changeover . . . . . . . . . . . . . . . . . . . . . 13

BASIC DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . 14

FIELD PIPING CONNECTIONS . . . . . . . . . . . . . . 15

VALVE PACKAGES . . . . . . . . . . . . . . . . . . . . . . . 16-19

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Two-Way Motorized Control Valve . . . . . . . . . . . 18

Two-Way Motorized Control Valve

with Aquastat Bleed Bypass Line . . . . . . . . . . 18 Three-Way Motorized Control Valve . . . . . . . . . 19 No Motorized Control Valve . . . . . . . . . . . . . . . . . 19

VALVE PACKAGE ARRANGEMENTS . . . . . . . 20-23

PIPING COMPONENTS . . . . . . . . . . . . . . . . . . . . 24-27

Cv FACTOR vs WATER PRESSURE DROP . . . 28

SYSTEM COMPONENT WORKING PRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

COPPER WATER TUBE AND JOINT MATERIAL PRESSURE RATINGS . . . . . . . . . . . . . . . . . . . . . 30

CORRECTION FACTORS FOR GLYCOL . . . . . . 31

STANDARD ACCESSORIES AND OPTIONS . . 32

Carrier 42 SERIES specifications Contents

Models: 42 SERIES