White Rodgers 1E78 Manual Do Utilizador

Base

Back of

Thermostat Body

W905
W904

Mounting

Hole

Mounting

Hole

Figure 1. Thermostat

W904 - clip for Celcius display
W905 - clip for hydronic system

Heating & Air Conditioning

1E78

Non-Programmable Heat Only Thermostat

PART NO. 37-6620A

0451

Installation Instructions for

White-Rodgers is a division

of Emerson Electric Co.

www.white-rodgers.com

To prevent electrical shock and/or equipment dam-

To prevent electrical shock and/or equipment dam-
age, disconnect electric power to system at main fuse

age, disconnect electric power to system at main fuse

age, disconnect electric power to system at main fuse
or circuit breaker box until installation is complete.

or circuit breaker box until installation is complete.

CAUTION

YOUR THERMOSTAT REPLACES

Typical System Compatibility Chart

1E78

Standard Heat Only Two Wire 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)

Heat/Cool Systems Electric Heat (24 volt)

Heat Only Electric Heat Systems (24 volt)

Cool Only Systems

Heat Pump Systems (No Aux. or Emergency Heat)

Hot Water Zone Heat Only (Two Wire) Systems

Yes

Hot Water Zone Heat Only (Three Wire) Systems

Line Voltage Heating or Baseboard 110/240 Volt Systems

Millivolt Systems Floor or Wall Furnaces

Yes

12 VDC Mobile Home Application

Yes

Multistage Systems

Systems Exceeding 30VAC, 1.5 Amp

PREPARATIONS

Assemble tools required as shown below.

HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED

FLAT BLADE SCREWDRIVER

WIRE CUTTER/STRIPPER

THERMOSTAT DETAILS

REMOVING OLD THERMOSTAT

Before removing wires from old thermostat’s switching subbase,
label each wire

label each wire

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

1. Remove Old Thermostat:

Remove Old Thermostat:

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

With wires

still attached,

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 using

Identify each wire attached to the old thermostat using

the labels enclosed with the new thermostat.

5. Disconnect the wires from the old thermostat one at a time.
DO NOT LET WIRES FALL BACK INTO THE WALL.

DO NOT LET WIRES FALL BACK INTO THE WALL.

6. Install new thermostat using the following procedures.

CONTENTS

Preparations ............................................... 1
Thermostat Details ..................................... 1
Removing Old Thermostat ......................... 1
Mounting and Wiring ................................... 2
Check Thermostat Operation ..................... 3
Specifications .............................................. 4
Troubleshooting .......................................... 4

Failure to follow and read all instructions carefully

Failure to follow and read all instructions carefully
before installing or operating this control could cause

before installing or operating this control could cause

before installing or operating this control could cause
personal injury and/or property damage.

personal injury and/or property damage.