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Blue 4” Universal Thermostat with
Automatic Heat/Cool Changeover Option
Single Stage, Multi-Stage or Heat Pump
Installation and Operating Instructions for Model:
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS
CAREFULLY BEFORE INSTALLING OR OPERATING
THIS CONTROL COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
Save these instructions for future use!
APPLICATIONS
SPECIFICATIONS
Electrical Rating:
Battery Power .................................................... mV to 30 VAC, NEC Class II, 50/60 Hz or DC
Input-Hardwire ................................................... 20 to 30 VAC
Terminal Load ........................................................... 1.5 A per terminal, 2.5A maximum all terminals combined
Setpoint Range ......................................................... 45° to 90°F (7° to 32°C)
Rated Differentials: Fast Med. Slow
Heat (SS1, MS2) ............................................... 0.4 °F 0.6 °F 1.7 °F
Cool (SS1, MS2) ................................................ 0.9 °F 1.2 °F 1.7 °F
Heat Pump (HP1, HP2) ..................................... 0.9 °F 1.2 °F 1.7 °F
Emer (HP1, HP2) ............................................... 0.6 °F – 1.7 °F
Operating Ambient .................................................... 32° to +105°F (0° to +41°C)
Operating Humidity ................................................... 90% non-condensing max.
Shipping Temperature Range ................................... -40° to +150°F (-40° to +65°C)
Dimensions Thermostat ............................................ 3-7/8”H x 5-1/8”W x 1-1/4”D
1F85-0477 Thermostat
Model Programming Choices
1F85-0477
7 Day 5/1/1 Day
ATTENTION: MERCURY NOTICE
This product does not contain mercury. However, this product
may replace a product that contains mercury.
Mercury and products containing mercury must not be
discarded in household trash. Do not touch any spilled
mercury. Wearing non-absorbent gloves, clean up any spilled
mercury and place in a sealed container. For proper disposal
of a product containing mercury or a sealed container. Refer
to www.white-rodgers.com for location to send product
containing mercury.
THERMOSTAT APPLICATION GUIDE
Description
Heat Pump (No Aux. or Emergency Heat) Yes
Heat Pump (with Aux. or Emergency Heat) Yes
Systems with up to 2 Stages Heat, 2 Stages Cool Yes
Heat Only Systems (with optional fan switch) Yes
Millivolt Heat Only Systems – Floor or Wall Furnaces Yes
Cool Only Systems Yes
Gas or Oil Heat Yes
Electric Furnace Yes
Hydronic (Hot Water) Zone Heat – 2 Wires Yes
Hydronic (Hot Water) Zone Heat – 3 Wires Yes
Index Page
Installation 2
Wiring Connections 2
Wiring Diagrams 3
Thermostat Quick Reference 5
Installer Configuration Menu 6
Operating Your Thermostat 8
Programming 9
Troubleshooting 10
PART NO. 37-7238A
1118
CAUTION
!
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
www.white-rodgers.com
www.emersonclimate.com