White Rodgers 1e+78 Installation Instructions

Installation Instructions for
Heating & Air Conditioning Heating & Air Conditioning Heating & Air Conditioning Heating & Air Conditioning Heating & Air Conditioning
1E78 1E78 1E78
1E78 1E78
Non-Programmable Heat Only Thermostat Non-Programmable Heat Only Thermostat Non-Programmable Heat Only Thermostat Non-Programmable Heat Only Thermostat Non-Programmable Heat Only Thermostat
YOUR THERMOSTAT REPLACES YOUR THERMOSTAT REPLACES YOUR THERMOSTAT REPLACES YOUR THERMOSTAT REPLACES YOUR THERMOSTAT REPLACES
Typical System Compatibility Chart Typical System Compatibility Chart Typical System Compatibility Chart Typical System Compatibility Chart Typical System Compatibility Chart
Standard Heat Only Two Wire Gas or Oil Fired Systems (24 volt)
Electronic Ignition Heat Only Two Wire Systems (24 volt)
Electronic Ignition Heat Only Gas or Oil Fired Systems (24 volt)
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
Hot Water Zone Heat Only (Three Wire) Systems
Line Voltage Heating or Baseboard 110/240 Volt Systems
Millivolt Systems Floor or Wall Furnaces
12 VDC Mobile Home Application
Multistage Systems
Systems Exceeding 30VAC, 1.5 Amp
2
THERMOSTAT DETAILS THERMOSTAT DETAILS THERMOSTAT DETAILS THERMOSTAT DETAILS THERMOSTAT DETAILS
Mounting
Hole
RC G RH W
Y O B
Mounting
Base
Hole
W904 - clip for Celcius display
W905 - clip for hydronic system
Figure 1. Thermostat
1E78 1E78 1E78 1E78 1E78
Yes
Yes
Yes
No
No
No
No
No
Yes
No
No
Yes
Yes
No
No
W905
W904
Back of
Thermostat Body
White-Rodgers is a division
of Emerson Electric Co.
www.white-rodgers.com
CONTENTS CONTENTS CONTENTS CONTENTS CONTENTS
Preparations ............................................... 1
Thermostat Details ..................................... 1

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

Mounting and Wiring ................................... 2
Check Thermostat Operation ..................... 3
Specifications .............................................. 4
Troubleshooting .......................................... 4
1
PREPARATIONS PREPARATIONS PREPARATIONS PREPARATIONS PREPARATIONS
Assemble tools required as shown below.
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
Failure to follow and read all instructions carefully Failure to follow and read all instructions carefully Failure to follow and read all instructions carefully 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 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. personal injury and/or property damage. personal injury and/or property damage. personal injury and/or property damage.
3
REMOVING OLD THERMOSTAT REMOVING OLD THERMOSTAT REMOVING OLD THERMOSTAT REMOVING OLD THERMOSTAT REMOVING OLD THERMOSTAT
CAUTION
!
To prevent electrical shock and/or equipment dam- To prevent electrical shock and/or equipment dam-
To prevent electrical shock and/or equipment dam- 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 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. or circuit breaker box until installation is complete. or circuit breaker box until installation is complete. or circuit breaker box until installation is complete.
Before removing wires from old thermostat's switching subbase,
label each wire label each wire
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: Remove Old Thermostat: A standard heat/cool thermostat Remove Old 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, still attached, still attached, 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 Identify each wire attached to the old thermostat using 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. the labels enclosed with the new thermostat. the labels enclosed with the new thermostat. the labels enclosed with the new thermostat. 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. DO NOT LET WIRES FALL BACK INTO THE WALL. 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.
FLAT BLADE SCREWDRIVER
WIRE CUTTER/STRIPPER
With wires With wires
With wires With wires
PART NO. 37-6620A PART NO. 37-6620A
PART NO. 37-6620A PART NO. 37-6620A PART NO. 37-6620A
0451