Emerson 1F78H - Manual
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Table of Contents:
- Page 2 – MOUNTING AND WIRING; CAUTION; REMOVING OLD THERMOSTAT; CONTINUED FROM FIRST PAGE; WARNING; TERMINAL CROSS REFERENCE CHART; Electric Heat or Single-Stage; Remove the packing material from the thermostat. Gently pull
- Page 3 – CHECK THERMOSTAT OPERATION; Figure 2. Typical wiring diagram for; Figure 3. Typical wiring diagram for; NOTE; Fan Operation; F, DO NOT operate the; Cooling System; CONTINUED FROM SECOND PAGE
- Page 4 – CONTINUED FROM THIRD PAGE; The Thermostat Buttons and Switches; C CONVERTIBILITY — The factory default setting is; CONFIGURATION MENU; Not Available
- Page 5 – SPECIFICATIONS; Configuration Menu; TROUBLESHOOTING; Symptom; No Heat
Installation Instructions for
Heating & Air Conditioning
1F78H
Non-Programmable Thermostat
CONTENTS
Preparations .................................................. 1
Thermostat Details ........................................ 1
Removing Old Thermostat ............................ 1
Mounting and Wiring ..................................... 2
Check Thermostat Operation ........................ 3
Configuration Menu ....................................... 4
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
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. 37-6450A
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
1
2
3
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
W
RH
B
RC
G
C
O
Y
GAS
ELEC
W 904
W 905
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
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Summary
MOUNTING AND WIRING Take care when securing and routing wires so they donot short to adjacent terminals or rear of thermostat.Personal injury and/or property damage may occur. CAUTION ! ATTENTION! This product does not contain mercury. How-ever, this product may replace a unit which contains mercury...
CHECK THERMOSTAT OPERATION www.white-rodgers.com 5 RH 24 VAC 120 VAC Hot Neutral THERMOSTAT SYSTEM G W Figure 2. Typical wiring diagram for heat only, 4-wire, single transformer systems TRANSFORMER Heating System Fan Relay Y RC JUMPER WIRE O B C For Heat only, attach to RH and W NOTE RH Y 24 VAC 120...
CHECK THERMOSTAT OPERATION CONTINUED FROM THIRD PAGE www.white-rodgers.com Before you begin using your thermostat, you should be familiarwith its features and with the display and the location andoperation of the thermostat buttons. Your thermostat consists oftwo parts: the thermostat cover and the ...
