White Rodgers 1F94 80 Thermostat User Manual

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1F94-80

Multi-stage Electronic Digital Thermostat

WHITE-RODGERS

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 multi-

stage systems. Use this thermostat for applications re-

quiring 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 ther-

mostat 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 incom-

ing power should fail. If power failure is extensive and the

program is lost, after power restoration, the thermostat

willautomaticallymaintainafactorypreprogrammedheat-

ing temperature of 64°F or a cooling temperature of 82°F.

PRECAUTIONS

Ifindoubtaboutwhetheryourwiringismillivolt,line,orlow All wiring must conform to local and national electrical

voltage, have it inspected by a qualified heating and air codes and ordinances.

conditioning contractor, electrician, or someone familiar

with basic electricity and wiring.

This control is a precision instrument, and should be

handled carefully. Rough handling or distorting compo-

nents could cause the control to malfunction.

Do not exceed the specification ratings.

CAUTION

CONTENTS

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

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

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

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

New Installation

To prevent electrical shock and/or equipment

damage, disconnect electric power to system, at

mainfuseorcircuitbreakerbox,untilinstallation

is complete.

Select Thermostat Location

Route Wires to Location

WARNING

Replacement Installation

Remove Old Thermostat

Do not use on circuits exceeding specified volt-

age. Higher voltage will damage control and

could cause shock or fire hazard.

Attach Subbase to Wall

Attach Thermostat to Subbase

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

System Configuration

Set Option Switches

Do not short out terminals on gas valve or pri-

marycontroltotest. Shortorincorrectwiringwill

burn out thermostat and could cause personal

injury and/or property damage.

Check Thermostat Operation

Fan Operation

Heating System

Cooling System

Troubleshooting

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

PART NO. 37-5185A

Printed in U.S.A.

9329

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:

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

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

}

ACCESSORIES

STAGING DATA

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

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

F29-0238 (opaque)

Up to two heating stages

Up to two cooling stages

INSTALLATION

ROUTE WIRES TO LOCATION

NEW INSTALLATION

All wiring must conform with local and national electrical

codes and ordinances.

YOU SHOULD PROGRAM THE THERMOSTAT WITH

BATTERY INSTALLED BEFORE ATTACHING ON

SUBBASE. SEEOPERATIONGUIDEFORPROGRAM-

MING INSTRUCTIONS.

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).Frombasement,drill3/4"holeinpartitionfloornext

to guide hole. In buildings without basements, drill 1/

2" hole through ceiling and into partition from above

(see fig. 1).

SELECT THERMOSTAT LOCATION

Proper location insures that the thermostat will provide a

comfortable building temperature. Observe the following

general rules when selecting a location:

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.

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 equip-

ment.

3. Attachthermostatwirestocordandpullwiresthrough

hole in wall so that 6" of wire protrudes.

4. Avoid locations close to windows, adjoining outside

walls, or doors that lead outside.

1/2" hole for

thermostat wire

5. Avoid locations close to air registers or in the direct

path of air from them.

Stout cord with 6"

chain attached

6. Make sure there are no pipes or duct work in that part

of the wall chosen for the thermostat location.

Approximately

5 feet from floor

Baseboard

strip moulding

7. Never locate thermostat in a room that normally

warmer or cooler than the rest of the building.

1/4" guide hole

for sighting

8. Avoid locations with poor air circulation, such as

behind doors or in alcoves.

Quarter round

removed

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 installa-

tion 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.

PULL STRAIGHT OUT

3. If the old thermostat has a wall mounting plate,

removethethermostatandthewallmountingplateas

an assembly.

Figure 2. Removing thermostat from subbase

4. UsetheCrossReferenceGuidetofindthethermostat

type you are replacing.

TABLE 1. WIRE IDENTIFICATION LABELS

5. Identify each wire attached to the old thermostat

using the labels enclosed with the new thermo-

stat. 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 proce-

dures.

ATTACH SUBBASE TO WALL

NOTE

THIS THERMOSTAT REQUIRES BOTH THE HOT AND

COMMON SIDES OF THE 24vAC TRANSFORMER TO

BE PRESENT TO THE THERMOSTAT FOR OPERA-

TION.

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

gentlypullstraightout(seefig.2). Thethermostathas

pin and socket connectors. Forcing or prying on the

thermostat will cause damage to the unit.

TABLE 1. TERMINAL REFERENCE

NEW THERMOSTAT

TERMINAL

OLD THERMOSTAT

TERMINAL

LABEL

NUMBER

DESIGNATION

FUNCTION

DESIGNATION

(1)

(2)

(3)

(4)

(5)

(6)

(7)

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

(8)

(9)

(10)

(11)

(12)

(13)

Stage 2 Cool

Stage 1 Heat (compressor)

Stage 2 Heat (compressor)

Damper Motor

Expansion

plugs

2. Connect wires beneath terminal screws on sub-

base using appropriate wiring schematic (see figs.

3 through 6).

Connect wires under

terminal screws

3. Place subbase over hole in wall and mark mounting

hole locations on wall using subbase as a template.

S1S2

Mounting

hole

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

4-pin connector

Mounting

hole

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.

9-pin connector

Pull wires through

this opening

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

resistant material (such as fiberglass insulation) to

prevent drafts from affecting thermostat operation.

Figure 3. Subbase

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 iden-

tification and wiring. For proper installation, refer to the

original manufacturers' instructions.

Malfunction

Light

Thermostat

Control

Circuit

THERMOSTAT

SYSTEM

System

Monitor

Switch

Emergency

Relay

Constant

Output

Changeover

Energized

In Heat

Compressor

Contactor

Stage 2

Heat

Relay

Damper

Motor

Stage 1

Hot

120vAC

24vAC

Emergency

Relay

Switched

Output

Heat

Relay

Changeover

Energized

In Cool

Compressor

Contactor

Stage 1

Fan

Neutral

Relay

TRANSFORMER

Stage 2

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.

Malfunction

Light

Thermostat

Control

Circuit

THERMOSTAT

SYSTEM

Emergency

Relay

Constant

Output

Changeover

Energized

In Heat

Compressor

Contactor

Stage 2

System

Monitor

Switch

Limit or

Safety

Damper

Motor

CUT AND

TAPE OFF!

Switches

Hot

Emergency

Relay

Switched

Output

Heat

Relay

Changeover

Energized

In Cool

Compressor

Contactor

Stage 1

Limit or

Safety

Heat

Relay

120vAC

24vAC

Fan

TRANSFORMER

Hot

Relay

Neutral

TRANSFORMER

Stage 2

Switches

Stage 1

120vAC

Neutral

24vAC

HEAT PUMP SYSTEM

AUXILIARY HEATING SYSTEM

DEPENDING ON SYSTEM

REQUIREMENTS, REPLACE

WITH A 75VA TRANS-

TWO COMMONS MUST

BE JUMPERED TOGETHER!

FORMER, IF NEEDED

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

NOTE

CAUTION

Relaycontactsshownarethermostaticallyoperated. The

accessory relay scheme is required when safety circuits

exist in both systems.

Polarity must be observed. If the HOT side of the

secondtransformerisjumperedtotheCOMMON

side of the first transformer, a short will be made.

Damage to equipment will occur when power is

restored.

Malfunction

Light

Thermostat

Control

Circuit

THERMOSTAT

SYSTEM

Limit or

Safety

Limit or

Safety

Emergency

Relay

Constant

Output

System

Monitor

Switch

Changeover

Energized

In Heat

Compressor

Contactor

Stage 2

Damper

Motor

Hot

Switches

24vAC

120vAC

Neutral

Emergency

Relay

Switched

Output

Heat

Relay

Changeover

Energized

In Cool

Compressor

Contactor

Stage 1

AUXILIARY

HEATING

TRANSFORMER

Heat

Relay

24vAC

Fan

Accessory

Relay N.O.

Contact

Relay

Stage 2

Stage 1

Limit or

Safety

Limit or

HEAT PUMP SYSTEM

AUXILIARY HEATING SYSTEM

Safety

Hot

Switches

24vAC

TWO COMMONS MUST

BE JUMPERED TOGETHER!

120vAC

Neutral

HEAT PUMP

TRANSFORMER

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

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.

ATTACH THERMOSTAT TO SUBBASE

WERECOMMENDTHATYOUSETOPTIONSWITCHES

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 program-

ming instructions).

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

4-pin connector

Battery

SYSTEM CONFIGURATION

SET OPTION SWITCHES

1. Single Stage Compressor Heat Pump System —

with reversing valve energized through B or O termi-

nals

Option

diode

(CR5)

Field jumper W1 & Y1

Switch #1 OFF

Switch #2 (see step 3)

Switch #3 (see step 4)

Switch #4 (see step 5)

Option switches

9-pin connector

Figure 8. Back of thermostat

2. Two Compressor (Split) or Two Speed Compres-

sor System

5. Total Keypad Lockout (Enabled)

Field jumper W1 & Y1

Field jumper W2 & Y2

NOTE

Option switches #1, #2, and #3 should be changed (if

required), programming should be completed, and bat-

teryshouldbeinstalledbeforechangingoptionswitch#4.

Switch #1 ON

Switch #2 (see step 3)

Switch #3 (see step 4)

Switch #4 (see step 5)

Switch #1 (see steps 1 & 2)

3. Economizer Enabled for 1st Stage Cooling — use

with fresh air damper to conserve energy by bringing

temperature down more slowly

Switch #2 (see step 3)

Switch #3 (see step 4)

Switch #4 ON

Switch #1 (see steps 1 & 2)

Switch #2 ON

REVERSING VALVE DELAY OPTION

Switch #3 (see step 4)

Switch #4 (see step 5)

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,

therewillbeasix-seconddelaybeforethereversingvalve

is switched.

4. Energy Management Recovery Option (Enabled)

Switch #1 (see steps 1 & 2)

Switch #2 (see step 3)

Switch #3 ON

Switch #4 (see step 5)

EMERGENCY MODE OPERATION

CHECK THERMOSTAT OPERATION

SYSTEM

SWITCH

FAN OPERATION

1. Press

until EMER is displayed. The red

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

regardless of system cycling.

1. Turn on power to the system. If the auxiliary heat

source has a standing pilot, be sure to light it.

2. 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.

FAN

SWITCH

2. Press

untilFANONisdisplayed. Theblower

should begin to operate.

FAN

SWITCH

3. Press

until FAN AUTO is displayed. The

blower should stop operating within approximately

one minute.

After the system has been checked and is running prop-

erly, determine if automatic changeover is desired (see

SYSTEM CONFIGURATION).

HEATING SYSTEM

Refer to the OPERATION GUIDE if you need additional

information on thermostat operation.

SYSTEM

SWITCH

1. Press

until HEAT is displayed (it may al-

ready be displayed).

2. Press toadjustthermostatto99°F. Allstagesof

TROUBLESHOOTING

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 tempo-

rarily override the compressor lockout feature during

testing).

Refer to the Question & Answer section of the OPERA-

TION GUIDE for information on troubleshooting the ther-

mostat.

LOCKOUT BYPASS OPTION

COOLING SYSTEM

FOR QUALIFIED SERVICE TECHNICIANS’ USE

ONLY. OPERATORS SHOULD NOT USE THIS

FEATURE DUE TO POSSIBILITY OF EQUIPMENT

ORPROPERTYDAMAGE,ORPERSONALINJURY.

CAUTION

Topreventcompressorand/orpropertydamage,

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 com-

pressor was off! This will allow the compressor

heaters to warm the compressor oils to avoid

damage due to slugging.

COMPRESSOR SHORT TERM

CYCLE PROTECTION

This thermostat has a built-in short term (5-minute)

time delay. During this 5-minute period, the thermo-

stat will lock out the compressor to allow head pres-

sure to stabilize. If you want to override this feature

VIEW

SYSTEM

SWITCH

1. Press

2. Press

until COOL is displayed.

while testing thermostat operation, simply press

PRGM

toadjustthermostatto40°F. Allstagesof

VIEW

and

buttons at the same time at initial startup.

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 tempo-

rarily override the compressor lockout feature during

testing).

TEMP

DO NOT USE THE LOCKOUT BYPASS OPTION

UNLESSTHECOMPRESSOROILHEATERSHAVE

BEEN OPERATIONAL FOR 6 HOURS AND THE

SYSTEM HAS NOT BEEN OPERATIONAL FOR AT

LEAST 5 MINUTES.

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

THISWARRANTYSTATEMENTSUPERSEDESALLWARRANTY

STATEMENTS DATED PRIOR TO OCTOBER 1, 1991.

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.

White-Rodgers Division of Emerson Electric Co. (“Seller”) war-

rants 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’sobligationunderthiswarranty,andPurchaser’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, mainte-

nance, repair or alteration; or (3) which has been subjected to

misuse, negligence, or accident.

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 typi-

cally 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.

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