1C20R200 White-Rodgers, 1C20R200 Datasheet - Page 4

• Manufacturer Part Number: 1C20R200
• Description: THERMOSTAT; ECONOMY MODEL 200; MECHANICAL; HEAT ONLY
• Manufacturer: White-Rodgers
• Type: Temperaturer

Specifications of 1C20R200

• Brand/series: Model 200/300
• Display Type: Analog
• Function: Temperature
• Mounting Style: Wall
• Primary Type: Controller
• Range, Measurement: 50 to 90
• Voltage, Operating: 24 VAC
• Lead Free Status / Rohs Status: RoHS Compliant part
• For Use With: HVAC

8
Symptom
No Heat/No Cool/No Fan
(common problems)
No Heat
Intermittent Heat
No Cool
Heat, Cool or Fan Runs Constantly.
Furnace Cycles Too Fast or Too Slow
Narrow or wide temperature swing
Cooling Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
Thermostat Setting and Thermostat
Thermometer Disagree
Adjusting Thermometer
White-Rodgers is a division
TROUBLESHOOTING
of Emerson Electric Co.
Possible Cause
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
1. Pilot light not lit.
2. Broken or melted anticipator wire.
3. Loose connection to thermostat or system.
4. Thermostat or heating system requires
5. System Switch not set to Heat.
1. Furnace Lock-Out Condition
1. Loose connection to thermostat or system.
2. Thermostat or cooling system requires
3. System Switch not set to Cool.
1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan system.
See Step 5, Adjusting the Anticipator.
1. Poor thermostat location for sensing room
2. Cooling system over or undersized.
3. Excessive Current draw influencing thermostat.
1. Thermostat thermometer setting requires
2. Thermostat setting lever requires calibration.
1. Thermostat thermometer disagrees with
panel loose or not properly installed.
replacement or service.
replacement or service.
temperature.
adjustment.
other room thermometers.
www.white-rodgers.com
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 qualified 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.
Set System Switch to Heat and raise temp above
room temp.
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.
Verify thermostat and system wires are securely
attached.
Your cooling system manufacturer or service
person can describe how to test the cooling
system to verify it is operating correctly. If the
cooling system is capable of operation and the no
cooling condition persists, replace the thermostat.
Set System Switch to Cool and lower temp below
room temp.
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
influence the cycle rate.
The cycle rate for cooling can not be adjusted.
The location of the thermostat, size of the Cool
system and current draw can influence the cycle
rate. Contact a local service person for suggestions.
The thermometer can be adjusted by using a
standard slotted screwdriver. Turn the thermom-
eter 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
by using a standard slotted screwdriver. Turn the
thermometer pointer screw located inside the
front cover to change the setting.
calibrated at our factory but you can adjusted it
The Emerson logo is a
trademark and a service mark
of Emerson Electric Co.