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Printed in U.S.A.
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
Non-Programmable Electronic Digital
Heat Pump Thermostat
PART NO. 37-5741A
Operator: Save these instructions for future use!
20 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.5 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals
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:
-40°F to 150°F
For use with:
• Heat pump systems with up to two stages heat,
one stage cool
DO NOT USE WITH:
• Millivolt systems
• Systems exceeding 30 VAC and 1.5 amps
• 3-wire zoned hydronic heating systems
Your new White-Rodgers Digital Heat Pump Thermostat
uses the technology of a solid-state microcomputer to
provide precise temperature control. This thermostat of-
fers you the flexibility to set heating and cooling tempera-
tures that fit your needs.
• Simultaneous heat and cool temperature storage
• LCD continuously displays set point and room tem-
• °F/°C convertibility
• Temperature range 45° to 90°F
• Eight terminals for single or two-transformer systems
• O/B terminal for heat pump systems
• Armchair Demonstration Capability
To prevent electrical shock and/or equipment
damage disconnect electric power to system at
main fuse or circuit breaker box until installation
Do not use on circuits exceeding specified volt-
age. Higher voltage will damage control and
could cause shock or fire hazard.
Do not short out terminals on gas valve or pri-
mary control to test. Short or incorrect wiring will
damage thermostat and could cause personal
injury and/or property damage.
This thermostat is intended for use with a 24-volt system;
do not use this thermostat with a millivolt or line voltage
system. If in doubt about whether your wiring is millivolt,
line, or low 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 compo-
nents could cause the control to malfunction.