WHITE-RODGERS

1F94-80

Multi-stage Electronic Digital Thermostat

INSTALLATION 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

This wall-mounted, low voltage thermostat maintains room temperature by controlling the operation of multistage systems. Use this thermostat for applications requiring up to two stages of heat and/or cool. Indicator lights show the system status. The user will program two time/temperature settings per 24 hour period. The thermostat stores programs for seven independent days. The thermostat will store both heating and cooling programs simultaneously. A 9 volt Energizer ® battery will maintain the stored program for approximately one week, if incoming power should fail. If power failure is extensive and the program is lost, after power restoration, the thermostat will automatically maintain a factory preprogrammed heating temperature of 64

°

F or a cooling temperature of 82

°

F.

If in doubt about whether your wiring is millivolt, line, or low voltage, have it inspected by a qualified heating and air conditioning contractor, electrician, or someone familiar with basic electricity and wiring.

Do not exceed the specification ratings.

PRECAUTIONS

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.

CONTENTS

Description ......................................................... 1

Precautions ........................................................ 1

Specifications ..................................................... 2

Installation .......................................................... 2

New Installation

Select Thermostat Location

Route Wires to Location

Replacement Installation

Remove Old Thermostat

Attach Subbase to Wall

Attach Thermostat to Subbase

Operation ........................................................... 5

System Configuration

Set Option Switches

Check Thermostat Operation

Fan Operation

Heating System

Cooling System

Troubleshooting

!

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 burn out thermostat and could cause personal injury and/or property damage.

R

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

Printed in U.S.A.

PART NO. 37-5185A

9329

2

SPECIFICATIONS

THIS CONTROL IS DESIGNED FOR USE WHERE BOTH SIDES OF THE TRANSFORMER ARE PRESENT

TO THE THERMOSTAT (both the hot and common sides of the 24vAC end of the transformer.)

ELECTRICAL DATA

Electrical Rating:

20 to 30v AC 50/60 Hz.

0.01 to 1.5 Amps (Load per terminal)

2.5 Amps Maximum Total Load (All terminals

combined)

Anticipation:

Heating 4 to 40

Cooling 4 to 40

Auxiliary 4 to 40

}

Reference Values

THERMAL DATA

Setpoint Temperature Range:

40

°

F to 99

°

F (4

°

C to 37

°

C)

Operating Ambient Temperature Range:

32

°

F to 105

°

F

Operating Humidity Range:

0 to 90% RH (non-condensing)

Shipping Temperature Range:

-40

°

F to 150

°

F

STAGING DATA

Up to two heating stages

Up to two cooling stages

ACCESSORIES

Remote Sense Kit W. R. Part No. F145-1049

Thermostat Guard W. R. Part No. F29-0198 (clear) or

F29-0238 (opaque)

INSTALLATION

NEW INSTALLATION

ROUTE WIRES TO LOCATION

YOU SHOULD PROGRAM THE THERMOSTAT WITH

BATTERY INSTALLED BEFORE ATTACHING ON

SUBBASE. SEE OPERATION GUIDE FOR PROGRAM-

MING INSTRUCTIONS.

All wiring must conform with local and national electrical codes and ordinances.

SELECT THERMOSTAT LOCATION

Proper location insures that the thermostat will provide a comfortable building temperature. Observe the following general rules when selecting a location:

1.

Locate thermostat about 5 ft. above the floor.

2.

Install thermostat on a partitioning wall, not on an outside wall.

3.

Never expose thermostat to direct light from lamps, sun, fireplaces or any temperature radiating equipment.

4.

Avoid locations close to windows, adjoining outside walls, or doors that lead outside.

5.

Avoid locations close to air registers or in the direct path of air from them.

6.

Make sure there are no pipes or duct work in that part of the wall chosen for the thermostat location.

7.

Never locate thermostat in a room that normally warmer or cooler than the rest of the building.

8.

Avoid locations with poor air circulation, such as behind doors or in alcoves.

1.

Probe for obstructions in partition before drilling 1/2" hole in wall at selected location. Take up quarter round and drill a small guide hole for sighting (see fig.

1). From basement, drill 3/4" hole in partition floor next to guide hole. In buildings without basements, drill 1/

2" hole through ceiling and into partition from above

(see fig. 1).

2.

Through this hole drop a light chain, or 6" chain attached to a strong cord. nag cord in basement with hooked wire. In buildings without basements, drop cord through hole in ceiling and down partitioning; snag cord at the thermostat location.

3.

Attach thermostat wires to cord and pull wires through hole in wall so that 6" of wire protrudes.

1/2" hole for thermostat wire

Stout cord with 6" chain attached

Baseboard strip moulding

1/4" guide hole for sighting

Quarter round removed

Approximately

5 feet from floor

3/4" hole in floor of partition

Hooked wire for snagging chain

Figure 1. Routing thermostat wires

REPLACEMENT INSTALLATION

REMOVE OLD THERMOSTAT

1.

Shut off electricity at the main fuse box until installation is complete. Verify power is off with a voltmeter.

2.

Remove the front cover of the old thermostat. With

wires still attached, remove wall plate from the wall.

3.

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

4.

Use the Cross Reference Guide to find the thermostat type you are replacing.

5.

Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat. Record the identification of the wire on the corresponding blank in Table 2.

6.

Disconnect the wires from old thermostat one at a time. Pull at least 6 inches of wire out of the wall. DO

NOT LET WIRES FALL BACK INTO THE WALL.

7.

Install new thermostat using the following procedures.

PULL STRAIGHT OUT

Figure 2. Removing thermostat from subbase

G

1

9

Y1

Y1

9

1

G

TABLE 1. WIRE IDENTIFICATION LABELS

2

C

3

L

4

R

5

O

6

B

7

E1

8

E2

C

2

10

Y2

Y2

10

L

3

11

W1

W1

11

R

4

12

W2

W2

12

O

5

13

A1

A1

13

B

6

14

S1

S1

14

E1

7

15

S2

S2

15

E2

8

16

S3

S3

16

ATTACH SUBBASE TO WALL

1.

Remove the packing material from the thermostat.

Place the fingers of one hand on the center top and bottom portion of the thermostat. Grasp the subbase in the other hand on the top and bottom center, and gently pull straight out (see fig. 2). The thermostat has pin and socket connectors. Forcing or prying on the thermostat will cause damage to the unit.

NOTE

THIS THERMOSTAT REQUIRES BOTH THE HOT AND

COMMON SIDES OF THE 24vAC TRANSFORMER TO

BE PRESENT TO THE THERMOSTAT FOR OPERA-

TION.

LABEL

NUMBER

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(13)

TABLE 1. TERMINAL REFERENCE

NEW THERMOSTAT

TERMINAL

DESIGNATION FUNCTION

Y1

Y2

W1

W2

A1

G

C

L

R

O

B

E1

E2

Fan Output

Transformer 24VAC Common

Malfunction Light

Transformer 24VAC Hot

Changeover Output (cool)

Changeover Output (hot)

Emergency Heat Relay (cycles on first

stage in emergency mode)

Emergency Heat Relay (continually

energized in emergency mode)

Stage 1 Cool

Stage 2 Cool

Stage 1 Heat (compressor)

Stage 2 Heat (compressor)

Damper Motor

OLD THERMOSTAT

TERMINAL

DESIGNATION

3

2.

Connect wires beneath terminal screws on subbase using appropriate wiring schematic (see figs.

3 through 6).

3.

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

4.

Move subbase out of the way. Drill mounting holes.

5.

Fasten subbase loosely to wall, as shown in fig. 3, using two mounting screws. Place a level against bottom of subbase, 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 subbase snugly, use plastic expansion plugs to secure subbase.

6.

Push excess wire into wall and plug hole with a fireresistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

Mounting hole O

B

Y1

S1 S2 S3

W1

E1

E2

Y2

C

G

9-pin connector

L

R

W2

A1

4-pin connector

Pull wires through this opening

Expansion plugs

Connect wires under terminal screws

Figure 3. Subbase

Mounting hole

4

!

WARNING

DO NOT EXCEED MAXIMUM VOLTAGE OR

CURRENT RATINGS. FIRE, PERSONAL IN-

JURY, AND/OR EQUIPMENT DAMAGE COULD

!

CAUTION

RESULT.

To prevent electrical shock and/or equipment damage, disconnect electrical power at the main fuse box until installation is complete. Verify

NOTE

power is off with a voltmeter.

The following wiring diagram shows typical terminal identification and wiring. For proper installation, refer to the original manufacturers' instructions.

O

Changeover

Energized

In Cool

B

Changeover

Energized

In Heat

Y1

Compressor

Contactor

Stage 1

Y2

Compressor

Contactor

Stage 2

G

Fan

Relay

E2

Emergency

Relay

Constant

Output

E1

Emergency

Relay

Switched

Output

W1

Heat

Relay

Stage 1

W2

Heat

Relay

Stage 2

A1

Damper

Motor

Thermostat

Control

Circuit

Malfunction

Light

C L R

THERMOSTAT

SYSTEM

System

Monitor

Switch

Hot

120vAC 24vAC

Neutral

TRANSFORMER

Figure 4. Typical wiring diagram for single transformer systems

NOTE

IF SAFETY CIRCUITS ARE IN ONLY ONE OF THE

SYSTEMS, REMOVE THE TRANSFORMER OF THE

SYSTEM WITH NO SAFETY CIRCUITS.

Thermostat

Malfunction

Light

Control

Circuit

O B Y1 Y2 G A1 W1

CUT AND

TAPE OFF!

Changeover

Energized

In Heat

Hot

120vAC

Neutral

TRANSFORMER

24vAC

Changeover

Energized

In Cool

Compressor

Stage 1

Contactor

Contactor

Stage 2

Compressor

Fan

Relay

Damper

Motor

Heat

Relay

Stage 1

E1 E2

Emergency

Relay

Constant

Output

Emergency

Relay

Switched

Output

W2

Heat

Relay

Stage 2

C

System

Monitor

Switch

L R

THERMOSTAT

SYSTEM

Limit or

Safety

Switches

24vAC

TRANSFORMER

Hot

Limit or

Safety

Switches

120vAC

Neutral

HEAT PUMP SYSTEM

TWO COMMONS MUST

BE JUMPERED TOGETHER!

AUXILIARY HEATING SYSTEM DEPENDING ON SYSTEM

REQUIREMENTS, REPLACE

WITH A 75VA TRANS-

FORMER, IF NEEDED

Figure 5. Typical wiring diagram for two-transformer system with NO safety circuits

NOTE

Relay contacts shown are thermostatically operated. The accessory relay scheme is required when safety circuits exist in both systems.

!

CAUTION

Polarity must be observed. If the HOT side of the second transformer is jumpered to the COMMON side of the first transformer, a short will be made.

Damage to equipment will occur when power is restored.

O B Y1 Y2 G A1 W1 E1 E2 W2

Changeover

Energized

In Heat

Compressor

Contactor

Stage 2

Changeover

Energized

In Cool

Compressor

Contactor

Stage 1

Fan

Relay

Damper

Motor

Heat

Relay

Stage 1

Emergency

Relay

Constant

Output

Emergency

Relay

Switched

Output

Heat

Relay

Stage 2

Thermostat

Control

Circuit

Malfunction

Light

C L R

System

Monitor

Switch

THERMOSTAT

SYSTEM

Limit or

Safety

Switches

Hot

24vAC

Accessory

Relay N.O.

Contact

24vAC 120vAC

Neutral

AUXILIARY

HEATING

TRANSFORMER

Limit or

Safety

Switches

HEAT PUMP SYSTEM

TWO COMMONS MUST

BE JUMPERED TOGETHER!

AUXILIARY HEATING SYSTEM

Limit or

Safety

Switches

24vAC

Hot

120vAC

Neutral

HEAT PUMP

TRANSFORMER

Limit or

Safety

Switches

Figure 6. Typical wiring diagram for two-transformer system with safety circuits in BOTH systems

5

ATTACH THERMOSTAT TO SUBBASE

WE RECOMMEND THAT YOU SET OPTION SWITCHES

TO DESIRED POSITION BEFORE ATTACHING ON

SUBBASE (see OPERATION). WE ALSO RECOM-

MEND THAT YOU PROGRAM THE THERMOSTAT

WITH BATTERY INSTALLED BEFORE ATTACHING

ON SUBBASE (see OPERATION GUIDE for programming instructions). tors and the plastic snaps lock into place (see fig. 7). Be

gentle when attaching thermostat. If the thermostat does not seem to be attaching to the subbase easily, make sure that the connector pins and plastic snaps are properly aligned, and that excess wire is pushed into the wall. Damage to the thermostat may occur if force is used.

POWER TO THERMOSTAT MUST BE OFF BEFORE

ATTACHING THERMOSTAT TO WALL. FAILURE TO

TURN OFF POWER BEFORE ATTACHING THERMO-

STAT MAY CAUSE EQUIPMENT DAMAGE DUE TO

RAPID COMPRESSOR CYCLING.

To attach thermostat to subbase, line up the plastic snap guides at the top of the thermostat and the 4 connector pins on the thermostat with the connectors near the top right section of the subbase (when viewed from the front).

Gently pivot the thermostat down until the 9-pin connec-

ENGAGE TWO UPPER GUIDES;

PIVOT DOWN

Figure 7. Attaching thermostat to subbase

OPERATION

SYSTEM CONFIGURATION

4-pin connector Battery

SET OPTION SWITCHES

1.

Single Stage Compressor Heat Pump System — with reversing valve energized through B or O terminals

W1

ON

Y1

1 2 3 4

Field jumper W1 & Y1

Switch #1 OFF

Switch #2 (see step 3)

Switch #3 (see step 4)

Switch #4 (see step 5)

Option diode

(CR5)

Option switches 9-pin connector

Figure 8. Back of thermostat

2.

Two Compressor (Split) or Two Speed Compressor System

5.

Total Keypad Lockout (Enabled)

W1 Y1 Field jumper W1 & Y1

W2 Y2 Field jumper W2 & Y2

ON

1 2 3 4

Switch #1 ON

Switch #2 (see step 3)

Switch #3 (see step 4)

Switch #4 (see step 5)

3.

Economizer Enabled for 1st Stage Cooling — use with fresh air damper to conserve energy by bringing temperature down more slowly

NOTE

Option switches #1, #2, and #3 should be changed (if required), programming should be completed, and battery should be installed before changing option switch #4.

ON

1 2 3 4

Switch #1 (see steps 1 & 2)

Switch #2 (see step 3)

Switch #3 (see step 4)

Switch #4 ON

ON

1 2 3 4

Switch #1 (see steps 1 & 2)

Switch #2 ON

Switch #3 (see step 4)

Switch #4 (see step 5)

4.

Energy Management Recovery Option (Enabled)

ON

1 2 3 4

Switch #1 (see steps 1 & 2)

Switch #2 (see step 3)

Switch #3 ON

Switch #4 (see step 5)

REVERSING VALVE DELAY OPTION

The diode designated as CR5 controls whether or not there will be a delay in reversing valve switching (see fig.

8). With the diode installed and operational, there is no delay. If the diode is not operational or is disconnected, there will be a six-second delay before the reversing valve is switched.

6

CHECK THERMOSTAT OPERATION

EMERGENCY MODE OPERATION

FAN OPERATION

1.

Turn on power to the system. If the auxiliary heat source has a standing pilot, be sure to light it.

2.

Press FAN

SWITCH

until FAN ON is displayed. The blower should begin to operate.

3.

Press FAN

SWITCH

until FAN AUTO is displayed. The blower should stop operating within approximately one minute.

1.

Press SYSTEM

SWITCH

until EMER is displayed. The red

EMER LED should be lit continuously (non-flashing),

2.

regardless of system cycling.

Press to adjust thermostat about 5

°

F above room temperature. Any systems (such as electric strip heaters, fossil fuel systems, etc.) that are wired or jumpered to the emergency circuit (thermostat terminal E1) should begin to cycle.

After the system has been checked and is running properly, determine if automatic changeover is desired (see

SYSTEM CONFIGURATION).

HEATING SYSTEM

1.

Press SYSTEM

SWITCH

until HEAT is displayed (it may already be displayed).

2.

Press to adjust thermostat to 99

°

F. All stages of the heating system should begin to operate within approximately five minutes. However, if the PUMP

LED is flashing, the compressor lockout feature is operating (see Lockout Bypass Option to temporarily override the compressor lockout feature during testing).

Refer to the OPERATION GUIDE if you need additional information on thermostat operation.

TROUBLESHOOTING

Refer to the Question & Answer section of the OPERA-

TION GUIDE for information on troubleshooting the thermostat.

COOLING SYSTEM

!

CAUTION

To prevent compressor and/or property damage, if power to the compressor has been off or interrupted for more than 1 hour and the outdoor temperature is below 50

°

F, DO NOT operate the system for at least the amount of time the compressor was off! This will allow the compressor heaters to warm the compressor oils to avoid damage due to slugging.

1.

Press SYSTEM

SWITCH

until COOL is displayed.

2.

Press to adjust thermostat to 40

°

F. All stages of the cooling system should begin to operate within approximately five minutes. However, if the PUMP

LED is flashing, the compressor lockout feature is operating (see Lockout Bypass Option to temporarily override the compressor lockout feature during testing).

LOCKOUT BYPASS OPTION

FOR QUALIFIED SERVICE TECHNICIANS’ USE

ONLY. OPERATORS SHOULD NOT USE THIS

FEATURE DUE TO POSSIBILITY OF EQUIPMENT

OR PROPERTY DAMAGE, OR PERSONAL INJURY.

COMPRESSOR SHORT TERM

CYCLE PROTECTION

This thermostat has a built-in short term (5-minute) time delay. During this 5-minute period, the thermostat will lock out the compressor to allow head pressure to stabilize. If you want to override this feature while testing thermostat operation, simply press VIEW

PRGM and VIEW

TEMP

buttons at the same time at initial startup.

DO NOT USE THE LOCKOUT BYPASS OPTION

UNLESS THE COMPRESSOR OIL HEATERS HAVE

BEEN OPERATIONAL FOR 6 HOURS AND THE

SYSTEM HAS NOT BEEN OPERATIONAL FOR AT

LEAST 5 MINUTES.

7

If you need further information about this product, please write to

White-Rodgers Division, Emerson Electric Co.

9797 Reavis Road

St. Louis, MO 63123-5398

Attention: Technical Service Department

WARRANTY INFORMATION

THIS WARRANTY STATEMENT SUPERSEDES ALL WARRANTY

STATEMENTS DATED PRIOR TO OCTOBER 1, 1991.

White-Rodgers Division of Emerson Electric Co. (“Seller”) warrants that its products purchased for resale (the “Products”) will be free from defects in material and workmanship under normal use and service for a period of twelve (12) months from date of installation. Seller’s obligation under this warranty, and Purchaser’s exclusive remedy for the breach thereof, shall be limited to, at

Seller’s option, Seller’s replacement of any defective Product

F.O.B. Seller’s factory (excluding the cost of labor and any other expenses incurred in servicing the unit on which the Product is installed), or Seller’s issuance of a credit in the amount of the purchase price of such Product for resale as described below.

Seller shall have the option of requiring the return of any defective

Product, transportation charges prepaid, before recognizing any claim. This warranty shall not apply to any Product (1) which has been repaired or altered outside Seller’s factory by other than

Seller in any manner so as, in Seller’s judgment, to affect its serviceability or proper operation; (2) which has been subjected by persons other than Seller to improper handling, operation, maintenance, repair or alteration; or (3) which has been subjected to misuse, negligence, or accident.

This warranty extends only to persons or organizations who purchase the Products for resale. THE FOREGOING CONSTI-

TUTES SELLER’S SOLE RESPONSIBILITY UNDER THIS WAR-

RANTY, AND PURCHASER’S EXCLUSIVE REMEDY FOR THE

BREACH THEREOF. EXCEPT AS OTHERWISE EXPRESSLY

SET FORTH IN THIS AGREEMENT, THERE ARE NO OTHER

WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MER-

CHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR

OTHERWISE. SELLER SHALL NOT BE LIABLE FOR ANY SPE-

CIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAM-

AGES OF ANY CHARACTER IN CONNECTION WITH THE

SALE, RESALE OR USE OF THE PRODUCTS.

Complete warranty information and instructions for replacing/ returning warranty products can be found in the White-Rodgers

Product Catalog, or by telephoning or writing to:

White-Rodgers Division

Emerson Electric Co.

9797 Reavis Road

St. Louis, Missouri 63123-5398

(314) 577-1300

WARRANTY INFORMATION FOR CONSUMERS

When you purchase a White-Rodgers Division product, it is typically for replacement of a device which has failed on existing residential or commercial equipment, or a component of new equipment purchased for modernization.

While our warranty does not extend to you, your contractor or dealer is protected by a one-year product warranty from White-

Rodgers. Your supplier can rely on a nearby White-Rodgers wholesaler for prompt credit or replacement.