White Rodgers 1F90W-51 installation instructions Operator Save these instructions for future use

WHITE-RODGERS	1F90W-51
	5-Day/2-Day Electronic Digital Thermostat
	INSTALLATION INSTRUCTIONS

Operator: Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL 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 maintain 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.

PRECAUTIONS

If in doubt about whether your wiring is millivolt, line, or low Do not exceed the specification ratings. voltage, have it inspected by a qualified heating and air

conditioning contractor, electrician, or someone familiar with basic electricity and wiring.

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
Energy Management Recovery (EMR)
Check Thermostat Operation
Fan Operation
Heating System
Cooling System
Troubleshooting

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.

!CAUTION

To prevent electrical shock and/or equipment damage, disconnect electric power to system, at main fuse or circuit breaker box, until installation is complete.

!WARNING

Do not use on circuits exceeding specified volt- age. Higher voltage will damage control and could cause shock or fire hazard.

Do not short out terminals on gas valve or pri- mary control to test. Short or incorrect wiring will burn out thermostat and could cause personal injury and/or property damage.

WHITE-RODGERS DIVISION	PART NO. 37-5089A
EMERSON ELECTRIC CO.
9797 REAVIS ROAD	Printed in U.S.A.
	9139
RST. LOUIS, MISSOURI 63123