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To prevent electrical shock and/or equipment damage
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.
Printed in U.S.A.
DESCRIPTION
1F81-71
Programmable Electronic
Digital Automatic Changeover Multi-stage Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
PART NO. 37-5938B
Replaces 37-5938A
9912
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 5-Day/2-Day Digital Multi-stage Ther-
mostat uses the technology of a solid-state microcomputer to
provide precise time/temperature control. This thermostat offers
you the flexibility to design heating and cooling programs that fit
your needs.
Features:
• Separate 5-day (weekday) and 2-day (weekend) programming
with four separate time/temperature periods per program
• Simultaneous heat and cool program storage
• Optional C terminal (dual power option)
• Optional Energy Management Recovery (EMR)
PRECAUTIONS
SPECIFICATIONS
• Optional B and O terminals
• Preprogrammed temperature control
• LCD continuously displays set point, and alternately dis-
plays time and room temperature
• Temperature override until next program period
• Manual program override (HOLD temperature)
• °F/°C convertibility
• Temperature range 45° to 90°F
• Two-stage heat/two-stage cool
• Armchair programming capability
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 components could cause
the control to malfunction.
ELECTRICAL DATA
Electrical Rating:
20 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.5 Amps (Load per terminal)
2.5 Amps Maximum Total Load (All terminals combined)
THERMAL DATA
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
APPLICATIONS
For use with:
• Heat/cool systems with up to two stages heat, two
stages cool
DO NOT USE WITH:
• Millivolt systems
• Systems exceeding 30 VAC and 2.5 amps
• 3-wire zoned hydronic heating systems
CAUTION
!
WARNING
!
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
WHITE-RODGERS