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Carrier 42 SERIES User Manual

Carrier 42 SERIES
32 pages
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Application Data
Control Selection Guide
for Fan Coil Air Conditioners
42 Series
Fan Coil Units
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 3
Tab 7a
PC 201 Catalog No. 514-203 Printed in U.S.A. Form 42-3XC Pg 1 6-90 Replaces: 42-2XC
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Carrier 42 SERIES Specifications

General IconGeneral
RefrigerantR-410A
Voltage208/230V
Sound Pressure Level (Indoor)Not Available
Operating Temperature Range (Cooling)Not Available
Weight (Outdoor Unit)Vary by model
Indoor Unit TypeWall Mounted

Summary

Control Selection Guide

2-Pipe Heating-Cooling Systems

Control options for 2-pipe heating and cooling fan coil systems.

Electric Heat Systems

Control options for fan coil units with electric heat.

4-Pipe Systems

Control options for 4-pipe fan coil systems.

Standard Wiring Packages

Thermostatic Fan Control, 2-Pipe Systems

Wiring for thermostatic fan control in 2-pipe systems.

Thermostatic Fan Control, 2-Pipe System with Safety Cycle

Thermostatic Electric Valve Control, 2-Pipe

Superior control using a thermostatically controlled 2-position valve.

Thermostatic 2-Pipe Auxiliary Electric Heat with Valve Control

Thermostatic 2-Pipe Total Electric Heat with Valve Control

Thermostatic Valve Control, 4-Pipe

Electric Heat Application

Total Electric Heat

System provides complete heating, cooling available individually.

Auxiliary Electric Heat

Used for heating between seasons or during cooling.

Remote-Mounted Controls

Wall Thermostat, 2-Pipe

TC-126 thermostat for heating/cooling on line voltage.

Wall Thermostat, 4-Pipe

TH-126 thermostat for 4-pipe systems with electric heat.

Alternate Wall Thermostats

Honeywell Model T4039

Thermostat with manual 3-speed fan switch and ON-OFF switch.

Sunne Model 154

Thermostat with manual 3-speed fan switch and ON-OFF switch.

Unit-Mounted Controls

Standard 3-Speed Switch

Unit-mounted switch with OFF, HIGH, MED, LOW positions.

Combination Thermostat/ON-OFF Toggle Switch

Combines thermostat with toggle switch for fan control.

Combination Thermostat/3-Speed Switch

Unit-mounted thermostat and 3-speed switch in one box.

Two-Pipe Thermostat, Model TF103

Four-Pipe Thermostat, Model TH104

Thermostat for sequenced heating/cooling with 6-degree separation.

Automatic Changeover (Summer-Winter Switch)

Senses water temperature for cycle changes.

Valve Packages

General

Limitations on pneumatic valves, quantities, and types.

VALVE PACKAGES (cont)

Two-Way Motorized Control Valve

Electric 2-position valve that opens and closes.

Two-Way Motorized Control Valve with Aquastat Bleed Bypass Line

Valve with bypass for system temp sensing by aquastat.

Three-Way Motorized Control Valve

VALVE PACKAGE ARRANGEMENTS (cont)

Pneumatic Valve Packages

Illustrates pneumatic valve package arrangements, including legend and notes.

PIPING COMPONENTS (cont)

2-WAY MOTORIZED VALVE

Electric 2-position flow control valve with manual override.

3-WAY MOTORIZED VALVE

Electric 3-way flow control valve with manual override.

2-WAY PNEUMATIC VALVE

Pneumatically operated 2-way control valve.

3-WAY PNEUMATIC VALVE

Pneumatically operated 3-way control valve.

CORRECTION FACTORS FOR GLYCOL

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