White-rodgers 1F78H User Manual download pdf

Installation Instructions for

Heating & Air Conditioning

1F78H

5/2 Day Programmable Thermostat

CONTENTS

Preparations .................................................. 1

Thermostat Details ........................................ 1

Removing Old Thermostat ............................ 1

Mounting and Wiring ..................................... 2

Check Thermostat Operation ........................ 3

Configuration Menu ....................................... 4

Programming your Thermostat ..................... 5

Specifications ................................................ 7

Troubleshooting ............................................ 8

PREPARATIONS

THERMOSTAT DETAILS

REMOVING OLD THERMOSTAT

Before removing wires from old thermostat’s switching subbase,

label each wire with the terminal designation it was removed from.

1. Remove Old Thermostat: A standard heat/cool thermostat

consists of three basic parts:

a. The cover, which may be either a snap-on or hinge type.

b. The base, which is removed by loosening all captive screws.

c. The switching subbase, which is removed by unscrewing

the mounting screws that hold it on the wall or adaptor plate.

2. Shut off electricity at the main fuse box until installation is

complete. Ensure that electrical power is disconnected.

3. Remove the front cover of the old thermostat. With wires still

attached, remove wall plate from the wall. If the old thermostat

has a wall mounting plate, remove the thermostat and the wall

mounting plate as an assembly.

4. Identify each wire attached to the old thermostat.

5. Disconnect the wires from the old thermostat one at a time.

DO NOT LET WIRES FALL BACK INTO THE WALL.

6. Install new thermostat using the following procedures.

To prevent electrical shock and/or equipment damage,

disconnect electrical power to the system at the main

fuse or circuit breaker until installation is complete.

CAUTION

Printed in U.S.A.

PART NO. 37-6448A

0247

WHITE-RODGERS

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

www.white-rodgers.com

Failure to follow and read all instructions carefully

before installing or operating this control could cause

personal injury and/or property damage

Assemble tools required as shown below.

YOUR THERMOSTAT REPLACES

WIRE CUTTER/STRIPPER

Typical System Compatibility Chart 1F78H

Standard Heat Only Gas or Oil Fired Systems (24 volt)* Yes

Electronic Ignition Heat Only Two Wire Systems (24 volt)* Yes

Electronic Ignition Heat Only Gas or Oil Fired Systems (24 volt)* Yes

Standard Heat/Cool Systems (24 volt)* Yes

Heat/Cool Systems Electric Heat (24 volt)* Yes

Heat Only Electric Heat Systems (24 volt)* Yes

Cool Only Systems (24 volt)* Yes

Heat Pump Systems (No Aux or Emergency Heat)* Yes

Hot Water Zone Heat Only Systems No

Hot Water Zone Heat Only (Three Wire) Systems No

Line Voltage Heating or Baseboard 110/240 Volt Systems No

Millivolt Systems Floor or Wall Furnaces No

12 VDC Mobile Home Application No

Multistage Systems No

Systems Exceeding 30VAC, 1.5 Amp No

* Requires common wire for 24VAC at the thermostat

BRC

GAS

ELEC

W904

W905

Figure 1. Thermostat base

Mounting

hole

Mounting

hole

W905

Clip for

Hydronic

System

W904

Clip for

Celsius Display

Electric/Gas

Switch

HAND OR POWER

DRILL WITH 3/16 INCH

DRILL BIT, IF NEEDED

FLAT BLADE SCREWDRIVER

SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL—

THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - FLAT BLADE SCREWDRIVER

Installation Instructions forHeating & Air Conditioning1F78H5/2 Day Programmable ThermostatCONTENTSPreparations ...

Page 2 - REMOVING OLD THERMOSTAT

MOUNTING AND WIRINGTake care when securing and routing wires so they donot short to adjacent terminals or rear of thermostat.Personal injury and/or pr

Page 3 - Cooling System

CHECK THERMOSTAT OPERATIONwww.white-rodgers.com5RH24 VAC120 VACHotNeutralTHERMOSTATSYSTEMG WFigure 2. Typical wiring diagram forheat only, 4-wire, si

Page 4 - OPERATING FEATURES

CHECK THERMOSTAT OPERATIONCONTINUED FROM THIRD PAGEwww.white-rodgers.comBefore you begin programming your thermostat, you should befamiliar with its f

Page 5 - Set Current Time and Day

www.white-rodgers.comPress or to select: SLOFFOFFON4 LO to 4 HICConfiguration Menu* Press HOLD to advance to next item or TIME to mo

Page 6 - Check your programming

www.white-rodgers.comPROGRAMMING YOUR THERMOSTATCONTINUED FROM FIFTH PAGE6. Press or until you reach the current day of the week.7. Press RUN onc

Page 7 - SPECIFICATIONS

www.white-rodgers.comSymptom Possible Cause Corrective ActionNo Heat/No Cool/No Fan 1. Blown fuse or tripped circuit breaker. Replace fuse or reset br

Page 8 - CONTINUED FROM SEVENTH PAGE

Symptom Possible Cause Corrective ActionHeat, Cool or Fan Runs Constantly. 1. Possible short in wiring. Check each wire connection to verify they are

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White-rodgers 1F78H User Manual

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