White Rodgers 1C21 Bedienungsanleitung
BASE
COVER
CAPTIVE SCREWS
MOUNTING SCREWS
Figure 1.
OFF
Installation Instructions for
Cooling only
1C21
CONTENTS
Preparations...........................................
Thermostat Features..............................
Removing Old Thermostat .....................
Mounting and Wiring ..............................
New Thermostat Operation ....................
Specifications .........................................
Troubleshooting .....................................
PREPARATIONS
THERMOSTAT FEATURES REMOVING OLD THERMOSTAT
Before removing wires from old thermostat’s switching subbase,
label each wire withtheterminaldesignationitwasremovedfrom.
Some models also include an adaptor plate to cover unpainted
surfaces.Thermostatwirespassthroughtheadaptorplatecenter
opening.
1. Remove Old Thermostat: A standard heat/cool thermostat
consists of two basic parts:
a. The cover, which may be either a snap-on or hinge type.
b. Thebase,whichisremovedbylooseningallcaptivescrews.
PART NO. 37-6370B
Replaces 37-6370A
0835
Failure to follow and read all instructions carefully be-
fore installing or operating this control could cause
personal injury and/or property damage
Assemble tools required as shown below.
YOUR THERMOSTAT REPLACES
Adaptor Plate
(optional)
Description
1C21
Standard Heating & Cooling Systems - 4 or 5 wires No
Standard Cool Only Systems Yes
Millivolt Cool Only Systems - Floor or Wall Furnaces Yes
Standard Central Air Conditioning Yes
Gas or Oil Heat No
Electric Furnace No
Hydronic (Hot Water) Zone Heat - 2 Wires No
Hydronic (Hot Water) Zone Heat - 3 Wires No
Heat Pump (No Aux or Emergency Heat) No
Heat Pump (with Aux or Emergency Heat) No
Baseboard Electric Heating or Line Voltage (120 or 240 Volt) No
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WIRE CUTTER/STRIPPER
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL—
THERMOSTAT MUST BE LEVEL TO WORK PROPERLY
FLAT BLADE SCREWDRIVER
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
To prevent electrical shock and/or equipment damage,
disconnect electrical power to the system at the main
fuse or circuit breaker until installation is complete.
CAUTION
!
ATTENTION! This product does not contain mercury. How-
ever, this product may replace a unit which contains mercury.
Do not open mercury cells. If a cell becomes damaged, do not
touch any spilled mercury. Wearing non-absorbent gloves, take
up the spilled mercury and place into a container which can be
sealed.If a cellbecomes damaged, theunit should bediscarded.
Mercurymustnotbediscardedinhouseholdtrash.Whentheunit
this product is replacing is to be discarded, place in a suitable
container.Refertowww.white-rodger.comforlocationtosendthe
product containing mercury.
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A. Mount base and adaptor plate: Mount base and adaptor
plate (optional) to wall using screws provided (see Fig. 1).
B. Attach wires: Attach one wire to R and the other wire to Y on
base.
C. Snap on cover: Carefully align the cover with the base and
snap the cover onto the base.
MOUNTING AND WIRING NEW THERMOSTAT OPERATION
After power is turned on, slide temperature lever to desired
setting. To turn cool off, slide lever all the way to the left until it
clicks.
Take care when securing and routing wires so they do
not short to adjacent terminals or rear of thermostat.
Personal injury and/or property damage may occur.
CAUTION
!
TERMINAL CROSS REFERENCE CHART
New Thermostat
Terminal Designation
Other Manufacturers’
Terminal Designation
R
YV
C
ELECTRICAL DATA
Switch Rating ........................24 VAC (30 VAC max.)
Cooling ....................................0 to 1.5 Amps
Switch Action ........................Snap Action
Anticipator Rating:
Cooling ....................................Fixed
THERMAL DATA:
Temperature Range .............. 50°F to 90°F (10°C to 32°C)
Operating Humidity Range ... 0 – 90% noncondensing
SPECIFICATIONS
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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 sys-
tem shall conform to Class II circuits per the NEC code.
WARNING
!
Symptom Possible Cause Corrective Action
No Cool 1. Blown fuse or tripped circuit breaker. Replace fuse or reset breaker.
2. Furnace power switch to OFF. Turn switch to ON.
3. Furnace blower compartment door or Replace door panel in proper position to engage
panel loose or not properly installed. safety interlock or door switch.
4. Loose connection to thermostat or system. Verify thermostat and system wires are securely
attached.
5. Thermostat or cooling system requires Your cooling system manufacturer or service
replacement 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.
Cool Runs Constantly 1. Possible short in wiring. Check each wire connection to the thermostat to
2. Possible short in thermostat. verify it is neatly looped under the terminals. No
extra wire should stick out from under the
terminals.
Cooling Cycles Too Fast or Too Slow 1. Poor thermostat location for sensing room The cycle rate for cooling can not be adjusted.
(narrow or wide temperature swing) temperature. The location of the thermostat, size of the Cool
2. Cooling system over or undersized. system and current draw can influence the cycle
3. Excessive Current draw influencing thermostat. rate. Contact a local service person for suggestions.
Thermostat Setting and Thermostat 1. Thermostat thermometer setting requires The thermometer can be adjusted by using a
Thermometer Disagree adjustment. standard slotted screwdriver.Turn the thermom-
2. Thermostat setting lever requires calibration. 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.
Adjusting Thermometer 1. Thermostat thermometer disagrees with The thermometer on the thermostat is accurately
other room thermometers. calibrated at our factory but you can adjusted it
by using a standard slotted screwdriver.Turn the
thermometer pointer screw located inside the
front cover to change the setting.
TROUBLESHOOTING
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7
The Emerson logo is a
trademark and a service mark
of Emerson Electric Co.
White-Rodgers is a division
of Emerson Electric Co.
www.white-rodgers.com
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