WHITE-RODGERS
1F89-211
Non-programmable
Electronic
Digital
Heat Pump Thermostat
INSTALLATION
AND
OPERATION
INSTRUCTIONS
Operator: Save these instructions for future use
FAILURE
TO READ
AND FOLLOW
ALL INSTRUCTIONS
CAREFULLY
BEFORE INSTALLING
OR OPERATING
THIS CONTROL
COULD CAUSE
PERSONAL
INJURY AND/OR
PROPERTY
DAMAGE.
Your
new White-Rodgers
Digital
Thermostat
uses the
technology of a solid-state
microcomputer
to provide precise
temperature control.
Features:
• Simultaneous
heat and cool setpoint storage
• Setpoint storage in case of power loss
• Pre-set temperature
control
• LCD continuously displays setpoint and room temperature
DESCRIPTION
• Continuous Backlit display option
• °F/°C convertibility
• Temperature range 45 ° to 90°F
• R, C, Y, W2, G, O/B, E, and L terminals for single or two-
transformer systems
• Optional "AA" batteries to provide continuous temperature
display during loss of AC power
PRECAUTIONS
This thermostat is intended for use with a low voltage system; do
not use this thermostat with a line voltage system. If in doubt
about whether your wiring is mittivolt, line, or tow voltage, have
it inspected by a qualified heating and air conditioning contractor
or electrician.
Do not exceed the specification
ratings.
All wiring must conform to local and national electrical codes and
ordinances.
This control is a precision instrument,
and should be handled
carefully. Rough handling or distorting components could cause
the control to malfunction.
To prevent electrical shock and/or equipment
dam-
age, disconnect electric power to system at main fuse
or circuit breaker box until installation is complete.
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
Do not short out terminals
on gas valve or primary
control to test. Short or incorrect wiring will damage
thermostat
and could cause personal
injury and/or
property damage.
Thermostat
installation
and all components
of the
system shall conform to Class II (current limited) cir-
cuits per the NEC code. Failure to do so could cause a
fire hazard.
SPECIFICATIONS
ELECTRICAL
DATA
APPLICATIONS
Electrical Rating:
20 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.0 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals combined)
THERMAL
DATA
For use with:
Standard heat pump systems with electric, gas or oil Aux
heat with 24 VAC HOT and COMMON available
Single-stage
heat pump systems with no Aux heat with
24 VAC HOT and COMMON available
Setpoint Temperature
Range:
45°F to 90°F (7°C to 32°C)
Operating
Ambient
Temperature
Range:
32°F to 105°F
Operating
Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature
Range:
-4°F to 149°F
DO NOT USE WITH:
Mittivolt systems
Systems exceeding 30 VAC and 1.5 amps
3-wire zoned hydronic heating systems
WHITE-RODGERS
EMERSON ELECTRIC
CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI
63123-5398
www.white-rodgers.com
Printed in U.S.A.
PART NO. 37-6233D
Replaces 37-6233C
0225