1F83-261

Non-Programmable Electronic Digital

Multi-Stage Thermostat

INSTALLATION AND OPERATION INSTRUCTIONS

Operator: Save these instructions for future use!

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 Digital Thermostat 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:

• Simultaneous heat and cool setpoint storage

• Pre-set temperature control

• LCD continuously displays setpoint and room temperature

• Backlit display when any key is pushed

• °F/°C convertibility

• Temperature range 45° to 90°F

• R, C, W, W2, G , Y and Y2 terminals

• Optional C terminal (Dual Power option)

• Setpoint storage in case of power loss

• 2 “AA” Energizer

®

alkaline batteries included

PRECAUTIONS

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.

CAUTION

To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit breaker box until installation is complete.

WARNING

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.

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

SPECIFICATIONS

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

WHITE-RODGERS

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398 www.white-rodgers.com

Printed in U.S.A.

PART NO. 37-6321A

0143

INSTALLATION

REMOVE OLD THERMOSTAT

1. Shut off electricity at the main fuse box until installation is complete. Ensure that electrical power is disconnected.

2. Remove the front cover of the old thermostat. With wires

still attached, remove wall plate from the wall. If the old thermostat has a wall mounting plate, remove the thermostat and the wall mounting plate as an assembly.

3. Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat.

4. Disconnect the wires from old thermostat one at a time. DO

NOT LET WIRES FALL BACK INTO THE WALL.

5. Install new thermostat using the following procedures.

ATTENTION!

This product does not contain mercury. However, 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 nonabsorbent gloves, take up the spilled mercury with sand or other absorbent material and place into a container which can be sealed. If a cell becomes damaged, the unit should be discarded.

Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable container and return to White-Rodgers at 9797 Reavis

Road, St. Louis, MO, 63123-5398 for proper disposal.

Mounting holes

Electric/Gas switch

Screw anchors

Figure 1. Thermostat Base

Mounting holes

ELECTRIC HEAT SYSTEMS

This thermostat is configured from the factory to operate a heat/ cool, fossil fuel (gas, oil, etc.), forced air system. It is configured correctly for any system that DOES NOT require the thermostat to energize the fan on a call for heat. If your system is an electric heat or heat-pump system that REQUIRES the thermostat to turn on the fan on a call for heat, locate the GAS/ELECTRIC

switch on the thermostat base (see fig. 1) and switch it to the

ELECTRIC position. This will allow the thermostat to energize the fan immediately on a call for heat. If you are unsure if the heating/cooling system requires the thermostat to control the fan, contact a qualified heating and air conditioning service person.

material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

BATTERY LOCATION

2 "AA" alkaline batteries are included in the thermostat at the factory with a battery tag to prevent power drainage. You must

remove the battery tag to engage the batteries.

If BATT is displayed, the batteries are low and should be replaced with fresh "AA" Energizer ® alkaline batteries. To replace batteries, install the batteries along the top of the base

(see Fig. 1). The batteries must be installed with the positive (+) end to the left.

HYDRONIC (HOT WATER OR STEAM)

HEATING SYSTEMS

This thermostat is set to operate properly with a forced-air heating system. If you have a hydronic heating system (a system that heats with hot water or steam), you must set the thermostat to operate properly with your system. Change the second option in the configuration menu to SL (see CONFIGU-

RATION MENU, page 4).

ATTACH THERMOSTAT BASE TO WALL

1. Remove the packing material from the thermostat. Gently pull the cover straight off the base. Forcing or prying on the thermostat will cause damage to the unit. If necessary, move the electric heat switch (see ELECTRIC HEAT SYSTEMS, above).

2. Connect wires beneath terminal screws on base using appropriate wiring schematic (see figs. 2 through 4).

3. Place base over hole in wall and mark mounting hole locations on wall using base as a template.

4. Move base out of the way. Drill mounting holes.

5. Fasten base loosely to wall, as shown in fig. 1, using two mounting screws. Place a level against bottom of base, adjust until level, and then tighten screws. (Leveling is for appearance only and will not affect thermostat operation.) If you are using existing mounting holes, or if holes drilled are too large and do not allow you to tighten base snugly, use plastic screw anchors to secure subbase.

6. Push excess wire into wall and plug hole with a fire-resistant

CHECK THERMOSTAT OPERATION

If at any time during testing your system does not operate properly, contact a qualified service person.

Turn on power to the system.

Fan Operation

If your system does not have a G terminal connection, skip to

Heating System.

1. Move fan switch to ON position. The blower should begin to operate.

2. Move fan switch to AUTO position. The blower should stop immediately.

2

NOTE

The following wiring diagrams show typical terminal identification and wiring. For proper installation, refer to the original manufacturer’s instructions.

Relay contacts shown are thermostatically operated.

Y Y2

Compressor

Contactor

Stage 2

G W

Heat

Relay

Stage 1

W2

Thermostat

Control

Circuit

C* R

THERMOSTAT

SYSTEM

* The 24 Volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer ® alkaline batteries.

Compressor

Contactor

Stage 1

Fan

Relay

Heat

Relay

Stage 2

Hot

120 VAC 24 VAC

Neutral

TRANSFORMER

Figure 2. Typical wiring diagram for single transformer systems

CUT AND

TAPE OFF!

Y Y2 G

Hot

120 VAC

Neutral

TRANSFORMER

24 VAC

Compressor

Contactor

Stage 1

Compressor

Contactor

Stage 2

Fan

Relay

W

Heat

Relay

Stage 1

W2

Thermostat

Control

Circuit

C* R

THERMOSTAT

SYSTEM

* The 24 Volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer ® alkaline batteries.

Heat

Relay

Stage 2

24 VAC

Hot

120 VAC

Neutral

TRANSFORMER

TWO COMMONS MUST

BE JUMPERED TOGETHER!

Figure 3. Typical wiring diagram for two-transformer systems with NO safety circuits

Thermostat

Control

Circuit

* The 24 Volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer ® alkaline batteries.

Y Y2 G W W2 C* R

THERMOSTAT

SYSTEM

Compressor

Contactor

Stage 1

Compressor

Contactor

Stage 2

Fan

Relay

Heat

Relay

Stage 1

Heat

Relay

Stage 2

Limit or

Safety

Switches

24 VAC

Accessory

Relay N.O.

Contact

Common

24 VAC 120 VAC

Limit or

Safety

Switches

Hot

Neutral

HEATING

TRANSFORMER

TWO COMMONS MUST

BE JUMPERED TOGETHER!

Common

Limit or

Safety

Switches

24 VAC 120 VAC

Limit or

Safety

Switches

Hot

Neutral

COOLING

TRANSFORMER

Figure 4. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems

3

Heating System

1. Move SYSTEM switch to HEAT position. If the heating system has a standing pilot, be sure to light it.

2. Press to adjust thermostat setting above room temperature. The heating system should begin to operate.

3. Both stages of the heating system should begin to operate when the setpoint is set greater than 3°F above ambient.

4. Press to adjust temperature setting below room temperature. The heating system should stop operating.

Cooling System

CAUTION

To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

1. Move SYSTEM switch to COOL position.

2. Press to adjust thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation.

3. Both stages of the cooling system should begin to operate when the setpoint is set greater than 3°F below ambient.

4. Press to adjust temperature setting above room temperature. The cooling system should stop operating.

OPERATION

Before you begin using your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat cover and the base. To remove the cover, pull it straight out from the base. To replace the cover, line up the cover with the base and press until the cover snaps onto the base.

2

1

The Thermostat Buttons and Switches

(see figure 5)

➀

Raises temperature setting.

➁

Lowers temperature setting.

➂

FAN switch (ON, AUTO).

➃

SYSTEM switch (COOL, OFF, HEAT).

The Display

➄

Flame icon ( ) is displayed when the SYSTEM switch is in the HEAT position. Snowflake icon ( )is displayed (nonflashing) when the SYSTEM switch is in the COOL position.

Snowflake is displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly.

➅

Displays current temperature.

➆

Displays FILTER when the system has run for the selected filter time period as a reminder to change or clean your air filter.

➇

Displays setpoint temperature (this is blank when SYS-

TEM switch is in the OFF position).

➈

Displays BATTERY and LO in the current temperature location when the 2 "AA" batteries are low and should be replaced.

➉

1 indicates first stage is energized.

+2 indicates second stage is energized.

10

F

1 + 2

FAN

3

SYSTEM

ON AUTO COOL OFF HEAT

4

C

BATTERY FILTER

9 8 5 7 6 5

Figure 5. Thermostat display, buttons, and switches

CONFIGURATION MENU

The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements.

Move SYSTEM switch to the OFF position, then press and

at the same time to enter the configuration menu. The display will show the first item in the configuration menu.

The configuration menu chart below summarizes the configuration options. An explanation of each option follows.

Press and at the same time to change to the next menu item. To exit the menu, move the SYSTEM switch to HEAT or

COOL. If no keys are pressed within fifteen minutes, the thermostat will exit the configuration menu.

4

3

4

Step

1

2

5

6

7

8

Press Button(s)

Set SYSTEM switch to OFF and and and and and and and

Configuration Menu

Displayed (Factory Default) Press or to select: COMMENTS

SYSTEM switch must be OFF to configure thermostat options

SL Select FA or SL (Fast or Slow) heating cycle rate

(FA) d-L

(ON)

FILTER

(000)

LOC

(OFF)

0 HI

(0)

( F)

1 + 2

FA

(ON)

OFF

0 to 1950 hours

(in 50 hour increments)

ON

Select display backlight OFF or ON

Select Filter replacement run time

Select Compressor lockout OFF or ON

4 LO to

4 HI

C

OFF

Select temperature display adjustment higher or lower

Select temperature display to F or C

Select ON to start 2nd stage immediately when the setpoint is manually raised more than 3˚F in HEAT or lowered more than 3˚F in COOL from room temperature

Returns to normal operation

9

Set SYSTEM switch to HEAT

or COOL

2) Select FA or SL (Fast or Slow) Heating Cycle Rate - The

FA setting is frequently used for gas, oil or electric heat. The

SL setting produces a longer heating cycle which is normally for hot water or steam (hydronic) systems. Both settings produce very accurate temperature control and can be set to your personal preference. FA cycles the system just under 1°F and the SL setting cycles at approximately 1.5°F.

3) Select Display Backlight (d-L OFF or ON) - The display backlight improves display contrast in low lighting conditions. Selecting backlight ON will keep the light on for a short period of time after any key is pressed. Selecting OFF will keep the light off.

4) Select filter replacement run time - The thermostat will display FILTER after the selected time of operation. This is a reminder to change or clean your air filter. This time can be set from 0 to 1950 hours in 50 hour increments. A

selection of 000 will cancel this feature. When FIL-

TER is displayed, you can clear it by pressing and

at the same time. This resets the timer and starts counting the hours until the next filter change.

OPERATING FEATURES

Now that you are familiar with the thermostat buttons and display, read the following information to learn about the many features of the thermostat.

• SIMULTANEOUS HEATING/COOLING SETPOINT

STORAGE — You can enter both your heating and cooling setpoints at the same time. There is no need to change the thermostat at the beginning of each season.

• CONFIGURATION MENU — Allows you to customize certain thermostat options.

SETTING THE THERMOSTAT

This thermostat is very easy to operate. Set the SYSTEM switch to either HEAT or COOL then press or until the temperature you want to maintain is shown on the right side of the display. If you want to turn the system off, just move the

SYSTEM switch to OFF.

5) Select Compressor Lockout (LOC OFF or ON) - Selecting LOC ON will cause the thermostat to wait 5 minutes before turning on the compressor if the heating and cooling system loses power. It will also wait 5 minutes minimum between cooling cycles. This is intended to help protect the compressor from short cycling. Some newer compressors already have a time delay built in and do not require this feature. Your compressor manufacturer can tell you if the feature is already present in their system. When the compressor time delay occurs it will flash the (snowflake icon) for about five minutes then turn on the compressor.

6) Select Temperature Display Adjustment (4 LO to 4 HI)

- Allows you to adjust the room temperature display 4° higher or lower. Your thermostat was accurately calibrated at the factory but you have the option to change the display temperature to match your previous thermostat.

7) Select Temperature DIsplay (°F or °C) - Changes the display readout to Celsius or Fahrenheit as required.

The FAN switch controls the fan operation. When the FAN switch is set to AUTO, the fan will cycle with the furnace or air conditioner. When the FAN switch is set to ON, the fan will run continuously, regardless of SYSTEM switch position.

Reset Operation

TROUBLESHOOTING

If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat by pressing

OFF to HEAT at the same time. This also resets the factory

defaults to the configuration menu. If the thermostat has power, has been reset and still does not function correctly contact your heating/cooling service person or place of purchase.

, and move the SYSTEM switch from

8) Select Stage Fast (ON or OFF) - When selected ON, the second stage starts as soon as the setpoint temperature is manually raised 3°F in heat or lowered 3°F in cool from room temperature. When selected OFF, the second stage will delay approximately 15 minutes before starting.

5

Batteries

For optimum performance, we recommend replacing batteries once a year with fresh "AA" Energizer ® alkaline batteries.

TROUBLESHOOTING

Symptom

No Heat/No Cool/No Fan

(common problems)

No 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 Thermometer

Disagree

Blank Display and/or Keypad Not

Responding

Possible Cause

1. Blown fuse or tripped circuit breaker.

2. Furnace power switch to OFF.

3. Furnace blower compartment door or panel loose or not properly installed.

1. Pilot light not lit.

2. System Switch not set to Heat.

3. Loose connection to thermostat or system.

4. Furnace Lock-Out Condition. Heat may also be intermittent.

5. Heating System requires service or thermostat requires replacement.

1. System Switch not set to Cool.

2. Loose connection to thermostat or system.

3. Cooling System requires service or thermostat requires replacement.

1. Fan Switch set to Fan On.

2. Possible short in wiring.

3. Possible short in thermostat.

4. Possible short in Heat/Cool/Fan system.

1. The location of the thermostat and/or the size of the Heating System may be influencing the cycle rate.

1. The location of the thermostat and/or the size of the Cooling System may be influencing the

cycle rate.

1. Thermostat thermometer setting requires

adjustment.

1. Loss of power and dead batteries.

2. Voltage Spike or Static Discharge.

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.

Set System Switch to Heat and raise setpoint above room temperature.

Verify thermostat and system wires are securely attached.

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.

Diagonistic: Set System Switch to Heat and raise the setpoint above room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed above. If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating system is operating correctly.

Set System Switch to Cool and lower setpoint below room temperature.

Verify thermostat and system wires are securely attached.

Same procedure as diagnostic for No Heat condition except set the thermostat to Cool and lower the setpoint below the room temperature.

There may be up to a five minute delay before the thermostat clicks in Cooling if the compressor lock-out option is selected in the configuration menu (Item 6).

Check each wire connection to verify they are not shorted or touching together. No bare wire should stick out from under terminal screws.

Try resetting the thermostat. If the condition persists the manufacturer of your system or service person can instruct you on how to test the Heat/Cool system for correct operation. If the system operates correctly, replace the thermostat.

Item 2 in the Configuration Menu is the adjustment that controls the cycle rate. If an acceptable cycle rate is not achieved using the FA (Fast) or SL

(Slow) adjustment contact a local service person for additional suggestions.

The cycle rate for cooling is fixed and can not be adjusted. Contact a local service person for suggestions.

The thermometer can be adjusted +/- 4 degrees as listed in item 7 of the Configuration Menu. No other adjustment is possible.

Replace batteries and check heat/cool system for proper operation. If a voltage spike or static discharge occurs use the Reset Operation listed above.

For additional product information, visit www.white-rodgers.com