Troubleshooting; Typical Wiring; Specifications - White Rodgers 1E50N-303 Installation Instructions

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NEW THERMOSTAT OPERATION
This thermostat is easy to operate. After power is turned on, raise temperature abo-
ve room temperature to turn the heating system on. Lower temperature below room
temperature to turn heating system off.
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SPECIFICATIONS

ELECTRICAL DATA
Switch Rating...................................... 24 VAC (30 VAC max.)
Heating.................................................. 0.15 to 1.2 Amps
Anticipator Rating:
Heating.................................................. Adjustable from 0.15 to 1.2 Amps
THERMAL DATA:
Temperature Range............................. 50°F to 90°F (10°C to 32°C)
Operating Humidity Range................. 0 – 90% noncondensing
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TROUBLESHOOTING

Symptom Possible Cause
No Heat/ No Fan 1. Blown fuse or tripped circuit breaker.
(common problems)
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
No Heat 1. Pilot light not lit.
2. Broken or melted anticipator wire.
3. Loose connection to thermostat or
system.
4. Thermostat or heating system requires
replacement or service.
5. Setpoint temperature below room
temperature.
Intermittent Heat 1. Furnace Lock-Out Condition
Heat or Fan Runs 1. Possible short in wiring.
Constantly.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan system.
Furnace Cycles Too See Step 5, Adjusting the Anticipator.
Fast or Too Slow
(Narrow or wide
temperature swing)
Thermostat Setting 1. Thermostat thermometer setting
and Thermostat requires adjustment.
Thermometer Disagree
2. Thermostat setting lever requires
calibration.
Adjusting Thermometer 1. Thermostat thermometer disagrees
with other room thermometers.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
Heating
System
Figure 3. Typical wiring for single transformer heating system
Corrective Action
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage safety interlock or door switch.
Re-light pilot.
Excessive current or dead short in system. Have a qualifi ed service person check the system
before replacing thermostat.
Verify thermostat and system wires are securely attached.
Your furnace manufacturer or service person can describe how to test the heating system to
verify it is operating correctly. If the heating system is capable of operation and the no heat
condition persists, replace the thermostat.
Raise temperature above room temperature.
Many furnaces have safety devices that shut the system down when a lock-out condition
occurs. If the heat works intermittently contact the furnace manufacturer or local service
person for assistance.
Check each wire connection to the thermostat to verify it is neatly looped under the terminals.
No extra wire should stick out from under the terminals.
The anticipation setting is the only adjustment that effects the heating cycle rate. If an
acceptable cycle rate is not achieved using the anticipator contact a local service person for
additional suggestions. The location of the thermostat, size of the Heat/Cool System and
current draw can infl uence the cycle rate.
The thermometer can be adjusted by using a standard slotted screwdriver. Turn the
thermometer pointer screw located inside the front cover to change the setting. For calibrating
the setting lever contact a local heating and cooling service person.
The thermometer on the thermostat is accurately calibrated at our factory but you can adjust
it by using a standard slotted screwdriver. Turn the thermometer pointer screw located inside
the front cover to change the setting.
Heat
Anticipator
(adjustable)
THERMOSTAT
W R
24 VAC
SYSTEM
Hot
120 VAC
Neutral