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White Rodgers 1F78-151 White-Rodgers 70 Series Single Stage Thermostat Installation Instruction

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Failure  to  follow  and  read  all  instructions  carefully   
before  installing  or  operating  this  control  could  cause 
personal injury and/or property damage
Installation Instructions for 
Heating & Air Conditioning 
1F78
5/2 Day Programmable Thermostat 
CONTENTS
Preparations .................................................. 1
Thermostat Details ........................................ 1
Removing Old Thermostat ............................. 1
Mounting and Wiring ...................................... 2
Check Thermostat Operation ......................... 3
Programming your Thermostat ...................... 4
Specifications ................................................ 6
Troubleshooting ............................................. 6
2
 THERMOSTAT DETAILS
HAND OR POWER 
DRILL WITH 3/16 INCH 
DRILL BIT, IF NEEDED
FLAT BLADE SCREWDRIVER
WIRE CUTTER/STRIPPER
1
 PREPARATIONS
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
!
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.
PART NO. 37-6614C
Replaces 37-6614B
1027
Assemble tools required below.
3
 REMOVING OLD THERMOSTAT
Figure 1. Thermostat base
Mounting
hole
W903 Clip to
Disable EMR
Feature
W904 Clip for
Celsius Display
Mounting
hole
Electric/Gas
Switch
NOTE: Earlier models refer to 37-7006 for jumper locations.
W905 Clip for
Hydronic System
W
RH
B
RC
G
O
Y
+
-
+
-
GAS
ELEC
W904
W905
W903
www.white-rodgers.com
www.emersonclimate.com
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