White Rodgers 1F90-51 Specifications download pdf (Page 1)

PART NO. 37-5043B

Replaces 37-5043A

9533

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY

BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE

PERSONAL INJURY AND/OR PROPERTY DAMAGE.

INSTALLATION INSTRUCTIONS

1F90-51

5-Day/2-Day Electronic Digital Thermostat

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

Printed in U.S.A.

WHITE-RODGERS

Operator: Save these insructions for future use!

CONTENTS

Description ......................................................... 1

Precautions ........................................................ 1

Specifications ..................................................... 2

Installation.......................................................... 2

New Installation

Select Thermostat Location

Route Wires to Location

Replacement Installation

Remove Old Thermostat

Attach Subbase to Wall

Attach Thermostat to Subbase

Operation ........................................................... 6

System Configuration

Electric Heat Systems

Emergy Management Recovery (EMR)

Check Thermostat Operation

Fan Operation

Heating System

Cooling System

Troubleshooting

PRECAUTIONS

If in doubt about whether your wiring is millivolt, line, or low

voltage, have it inspected by a qualified heating and air

conditioning contractor, electrician, or someone familiar

with basic electricity and wiring.

Do not exceed the specification ratings.

All wiring must conform to local and national electrical

codes and ordinances.

This control is a precision instrument, and should be

handled carefully. Rough handling or distorting compo-

nents could cause the control to malfunction.

To prevent electrical shock and/or equipment

damage, disconnect electric power to system at

main fuse or circuit breaker box until installation

is complete.

Do not use on circuits exceeding specified volt-

age. Higher voltage will damage the control and

could cause shock or fire hazard.

Do not short out terminals on gas valve or primary

control to test. Short or incorrect wiring will burn

out thermostat and could cause personal injury

and/or property damage.

DESCRIPTION

This wall-mounted, low voltage thermostat maintains

room temperature by controlling the operation of heating

and cooling systems. The user may program up to four

time/temperature settings per 24 hour period. The ther-

mostat stores independent heating and cooling programs

for 5-day (weekday) and 2-day (weekend) periods. The

thermostat will store both heating and cooling programs

simultaneously. Three “AA” Energizer

batteries will main-

tain the stored program for approximately one year, if

incoming power should fail. If power failure is extensive

and the program is lost, after power restoration, the

thermostat will automatically maintain a factory

preprogrammed heating temperature of 64°F or a cooling

temperature of 82°F.

CAUTION

WARNING

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - WHITE-RODGERS

PART NO. 37-5043BReplaces 37-5043A9533FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLYBEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSEPERS

Page 2 - NEW INSTALLATION

2SPECIFICATIONSELECTRICAL DATAElectrical Rating:17 to 30 VAC, 50/60 Hz.0.05 to 1.5 Amps1.5 Amps Maximum Total Load (All terminalscombined)Anticipation

Page 3 - REPLACEMENT INSTALLATION

3REPLACEMENT INSTALLATIONREMOVE OLD THERMOSTAT1. Shut off electricity at the main fuse box until installa-tion is complete. Verify power is off with a

Page 4 - From 24 VAC transformer

4CAUTION!RHY24 VAC120 VACHotNeutralTHERMOSTATSYSTEMG WFigure 7. Typical wiring diagram for heat/cool, 4-wire, single transformer systemsTRANSFORMERCoo

Page 5 - ENGAGE TWO LOWER GUIDES;

5CAUTION!RHY24 VAC 120 VACHotNeutralTHERMOSTATSYSTEMG WHEATING TRANSFORMER24 VAC120 VACHotNeutralCOOLING TRANSFORMERCoolingSystemFanRelayHeatingSystem

Page 6 - HEATING SYSTEM

6SYSTEM CONFIGURATIONELECTRIC HEAT SYSTEMSFor central electric heat systems where the blower isenergized by a separate circuit through the fan relay(m

Page 7 - COOLING SYSTEM

7LOCKOUT BYPASS OPTIONFOR QUALIFIED SERVICE TECHNICIANS’ USEONLY. OPERATORS SHOULD NOT USE THIS FEA-TURE DUE TO POSSIBILITY OF EQUIPMENT ORPROPERTY DA

Page 8

If you need further information about this product, please write to:WHITE-RODGERSDivision of Emerson Electric Co.9797 Reavis RoadSt. Louis, MO 63123-5