White Rodgers 1E78-144 White-Rodgers 70 Series Non-Programmable Single Stage Thermostat Installation and Operation Instructions

White Rodgers Thermostats Installation and Operation Instructions - 1E78-144 White-Rodgers 70 Series Non-Programmable Single Stage Thermostat.
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CONTENTS

Preparations .................................................. 1
Thermostat Details ........................................ 1
Removing Old Thermostat ............................. 1
Mounting and Wiring ...................................... 2
Check Thermostat Operation ......................... 3
Specifications ................................................ 5
Troubleshooting ............................................. 5

  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 com-

plete. 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 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.

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.

PART NO. 37-6599B

Replaces 37-6599A

1026

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.

WIRE CUTTER/STRIPPER

Base

Back of 

Thermostat Body 

RC

G

RH

Y

O

B

W

W904

W905

Mounting

Hole

Mounting

Hole

Figure 1. Thermostat

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

NOTE: Earlier models refer to 37-7006 for jumper locations.

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

FLAT BLADE SCREWDRIVER

Installation Instructions for 

Heating & Air Conditioning 

1E78

Non-Programmable Thermostat

 

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)

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 (Two Wire) Systems

Yes

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

Yes

12 VDC Mobile Home Application

Yes

Multistage Systems

No

Systems Exceeding 30VAC, 1.5 Amp

No

CAUTION

!

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