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 circuits per the NEC
code.
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
Your new White-Rodgers 5-Day/1-Day/1-Day Digital Thermo-
stat 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), 1-day (Sat) and 1-day (Sun) pro-
gramming with four separate time/temperature periods per day
• Simultaneous heat and cool program storage
• Preprogrammed temperature control
• LCD continuously displays set point, and alternately
displays time and room temperature
• Backlit display when any key is pushed
• Temperature override until next program period
• Manual program override (HOLD temperature)
• Temporary HOLD
• °F/°C convertibility
• Temperature range 45° to 90°F
• R, C, W, W2, G, Y and Y2 terminals
• Optional C terminal (Dual Power option)
• Program storage in case of power loss.
• 2 “AA” Energizer
®
alkaline batteries included.
SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
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 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:
-4°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 1.5 amps
• 3-wire zoned hydronic heating systems
1F81-261
Programmable Electronic
Digital Multi-stage Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
Printed in U.S.A.
PART NO. 37-6228B
Replaces 37-6228A
0145
WHITE-RODGERS
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
www.white-rodgers.com
PRECAUTIONS
CAUTION
!
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 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.
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.
WARNING
!
Operator: Save these instructions for future use!
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