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The Emerson logo is a trademark and
a service mark of Emerson Electric Co.
70 Series
™
Single Stage Thermostat
White-Rodgers
WR-6526-2
1E78-140
Non-Programmable, Heat only
1E78-144
Non-Programmable
1E78-151
5/2 Day Programmable
St. Louis, Missouri Markham, Ontario
314-553-3600 905-201-4701
www.white-rodgers.com
Programming
Choice of 5/2 day programming
(weekday/weekend) or non-programmable
4 time and 4 temperature settings per
program for heating and cooling
(1E78-151)
Energy savings up to 33%
Display
Large, easy-to-read thermostat display
Lighted display for easier low-light viewing
Comfort & Convenience
Electronic temperature accuracy
Adjustable room temperature calibration
Performance
B & O terminals
Meets California Building Code, Title 24 (1E78-151)
Millivolt compatible
Battery-powered thermostat for maximum
compatibility (2 “AAA” premium brand batteries included)
Maintains room temperature differential
within +/- 1 degree
Dimensions
3.25"W x 5.3"H x 1.1"D
Electrical Specifications
Rating
0 to 30 VAC, 50/60 Hz or DC
0.05 to 1.0 Amp (load per terminal)
1.5 Amps maximum load (all terminals combined)
Standard Systems
Single stage gas, oil, electric
Single stage heat pump
(1E78-151 and 1E78-144)
Millivolt compatible
Thermal Specifications
Setpoint Temperature Range:
45° to 90°F (7° to 32°C)
Rated Differential:
0.6° to 1.9°F with adjustable anticipation
Operating Ambient Temperature:
32° to 105°F (0° to 40°C)
Operating Humidity Range:
90% non-condensing maximum
Shipping Temperature Range:
-40° to 150°F (-40° to 65°C)
Accessories
Wall Plate F61-2593 (4.5"W x 6.6"H)
Subbase F4-1748 (3.25"W x 5.3"H)
“New Construction Stat” 1D78-140 with
heat only 65 setpoint (Must be used with
F4-1748 subbase)
Thermostat Guard F29-0143
(For additional guard options refer
to White-Rodgers catalog)
For Additional Information
Visit www.white-rodgers.com
“New Construction Stat”
1D78-140
Wall Plate F61-2593
F4-1748 Subbase mounted on 2" x 4" Junction Box (not supplied)
with 1D78-140 “New Construction Stat”
1D78-140
F4-1748
Terminal Designations (1E78-151, 1E78-144, F4-1748)
Y
W
O
G
B
RC
RH
Heating
System
Cooling
System
Energized
in Heating
Energized
in Cooling
Blower/Fan
24V Hot
(cooling)
24V Hot
(heating)
Terminal Designations (1E78-140)
RH
W
24V Hot
(heating)
Heating
System