White Rodgers 1C21 Manuel utilisateur

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

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

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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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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