WHITE-RODGERS

1F58-72

Low Voltage Multi-Stage Heat PumpThermostat

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 thermostat and subbase combination is designed to control a heat pump system where automatic changeover is not required. The reversing valve may be energized when the SYSTEM switch is moved to the HEAT or COOL position.

The subbase is equipped with EMER HEAT, AUX HEAT, and CHECK operation indicator lights.

CHECK

LIGHT

AUX

HEAT

EMER

HEAT

FAN

AUTO

ON

COOL

SYSTEM

OFF

HEAT EMER.

50

60

70

80

90

90

80

70

60

50

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.

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.

!

PRECAUTIONS

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.

Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will burn out heat anticipator and could cause personal injury and/or property damage.

!

WARNING

Do not use on circuits exceeding 30 volts. Higher voltage will damage control and could cause shock or fire hazard.

ELECTRICAL DATA

Switch Rating:

24 VAC

Stage 1 heat – 0 to 1.2 amp

Stage 2 heat – 0.15 to 1.2 amp

Cooling – 0 to 1.5 amp

Switch Action:

Stage 1 heat & cool – SPDT

Stage 2 heat – SPST (sealed mercury contacts)

Anticipator Rating:

Stage 1 heat – 24 VAC, fixed

Stage 2 heat – 0.15 to 1.2 amp, adjustable

Cooling – 24 VAC, fixed

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

Printed in U.S.A.

SPECIFICATIONS

Circuit: Manual Changeover – Reversing valve may be energized when the SYSTEM switch is switched either the HEAT or COOL position on the subbase (see wiring diagram).

THERMAL DATA

Temperature Range: 50

°

F to 90

°

F (10

°

C to 32

°

C)

Rated Differential: Stage 1 heat – 1.5

°

F

Stage 2 heat – 1

°

F

Cooling – 1.5

°

F

DIMENSIONS (INCLUDING SUBBASE):

Height 3 1 ⁄

4

”, width 5 3 ⁄

4

”, depth 2 1 ⁄

8

”

PART NO. 37-4046F

Replaces 37-4046E

9414

INSTALLATION

SELECT THERMOSTAT LOCATION ATTACH SUBBASE TO WALL

Proper location insures that the thermostat will provide a comfortable home 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 is warmer or cooler than the rest of the home, such as the kitchen.

8.

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

9.

The living or dining room is normally a good location, provided there is no cooking range or refrigerator on opposite side of wall.

1.

Pull wires through opening near center of subbase and connect wires under terminal screws (see figs. 2 & 3).

2.

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

3.

Place subbase over hole in wall for wires and mark mounting hole locations on wall.

4.

Drill mounting holes.

5.

Fasten subbase loosely to wall, as shown, using two mounting screws. Place a level against bottom of subbase, adjust until level, and then tighten mounting screws to secure subbase. If holes in wall are too large and do not allow you to tighten subbase snugly, use plastic screw anchors to secure subbase.

6.

Check anticipator setting and adjust, if required (see

OPERATION & MAINTENANCE).

!

CAUTION

Care must be taken when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Shorted wires may result in personal injury and/or property damage.

ROUTE WIRES TO LOCATION

1.

If an old thermostat is being replaced and is in a satisfactory location, and the wiring appears to be in good condition, use existing wiring. If in doubt, rewire.

2.

If a new location is chosen or if this is a new installation, thermostat wire must first be run to the location selected. All wiring must conform with local and national electrical codes and ordinances.

3.

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 houses without basements, drill 1 ⁄

2

” hole through ceiling and into partition from above (see fig. 1).

4.

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

5.

Attach thermostat wire to cord and pull wire 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

2

!

CAUTION

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

!

FAN CAUTION

To prevent personal injury and/or equipment damage, check equipment manufacturer’s wiring of fan relay circuit when in EMER HEAT. When the thermostat system switch is in the EMER HEAT position, the thermostat DOES NOT energize the fan relay when the fan switch is in the AUTO position.

NOTE

This typical wiring diagram shows only the terminal identification and wiring hookup. Always refer to wiring instructions provided by equipment manufacturer for system hookup.

All wiring should be installed in accordance with local and national codes and ordinances.

COOL

STAGE 1

HEAT

Fixed Stage 1 Heat

& Cool Anticipator

STAGE 2

HEAT

Adjustable Stage 2

Heat Anticipator

THERMOSTAT

Fan

Switch

AUTO ON

G R

24 VAC

FAN

RELAY

120 VAC

TRANSFORMER

SUBBASE

COOL

OFF

HEAT

EMER.

COOL

System

Switch

HEAT

OFF

CHECK

Light

EMER

Light

EMER.

AUX Light

L

Malfunction

Switch

X1 E B W2 Y O

EMER. HEAT

RELAY

* AUXILIARY

HEAT RELAY

COMPRESSOR

CONTACTOR

*

* Reversing Valve – if the reversing valve in your heat pump energizes during HEAT, then make your electrical connection at terminal B on the subbase. If the reversing valve is energized during COOL, then make your connection at terminal O on the subbase.

Always refer to equipment manufacturer’s instructions for proper identification of the reversing valve electrical connections.

HEAT PUMP

SYSTEM

Figure 2. Typical wiring diagram

The emergency light cycles with emergency heat.

The auxiliary light cycles with stage

2 heat in either HEAT or EMER system switch positions.

If a malfunction switch is wired to terminal L, the check light will indicate a malfunction when switch contacts close.

3

ATTACH THERMOSTAT TO SUBBASE

1.

Remove cover from thermostat base by gripping the base in one hand and with the fingers of the other hand, pull lightly at the top or bottom of the cover.

2.

Carefully remove the shipping protective packing from the mercury switches.

3.

Attach thermostat base to subbase. Be sure that all captive screws are tightened snugly, because they serve as electrical connections between thermostat and subbase (see fig. 4).

4.

Snap cover onto thermostat and set temperature lever to desired setpoint. Turn on electrical power.

FAN

AUTO ON COOL

SYSTEM

OFF HEAT EMER.

CHECK

LIGHT

AUX

HEAT

AUTO

FAN

ON

Mounting screws

COOL

SYSTEM

OFF

HEAT

CHECK

LIGHT

Captive terminal screws

G Y EMER

HEAT

R

AUX

HEAT

E

B

W2

EMER

HEAT

X1 L O

Mounting screw

KEEP THIS AREA

CLEAR OF WIRES!

Hole in wall

Mounting screw

Figure 3. Thermostat subbase

50

60

70

80

90

90

80

70

60

50

Thermostat

Subbase

Captive terminal screws

Cover

Figure 4. Attach thermostat to subbase

OPERATION &

MAINTENANCE

The chart below shows the how the system functions when the system and fan switches are in various positions.

SUBBASE SWITCH POSITIONS

FAN SYSTEM

Auto On Cool Off Heat Emer

Fan

Relay

Rev

Valve

SYSTEM FUNCTION

Emer

Heat

Relay

Aux

Heat

Relay

Compr.

Contact

Emer

Light

Aux

Light

COMPONENT OPERATION

No heat - no cool - no fan - no lights

G

G

B

Indicates switch position on thermostat subbase and system function at those switch positions.

Reversing valve energized if connected to B terminal.

B

B

B

B

O

Heat Mode: stage 1 calling. Fan relay and compressor contactor energized by thermostat.

Heat Mode: both stages calling. Fan relay, compressor contactor, and auxiliary heat relay are energized. Aux. light on.

Emergency Heat Mode: stage 1 calling. Emergency heat relays energized. Compressor locked out at thermostat. Emer. light on.

Emergency Heat Mode: both stages calling. Emergency and auxiliary heat relays energized. Compressor locked out at thermostat. Emer. and aux. lights on.

Cool Mode: Compressor contactor and fan relay energized.

Fan relay energized. Fan runs continuously, regardless of system switch position.

When check light is wired to a malfunction switch in the heat pump system, check light will come on when the malfunction switch contacts close, regardless of system switch position.

O Reversing valve energized if connected to the O terminal.

G See fig. 2 (fan caution)

4

ADJUSTING STAGE 2 HEAT ANTICIPATOR

This thermostat is equipped with two anticipators. The anticipator for stage 1 heat and cool is fixed and does not require any adjustments. The stage 2 anticipator is adjustable and must be set to the current draw of the component it is controlling.

To determine the correct stage 2 anticipator setting, measure the current draw of the stage 2 (auxiliary heat) relay. You may use the following procedure to determine current draw.

The stage 2 heat anticipator is located on the thermostat base. Adjust the anticipator by turning the lever until the pointer is set on the correct anticipator setting determined above (see fig. 6). If additional adjustments are necessary, they may be made as follows (adjust the anticipator

1 ⁄

2

division at a time; for example, from 0.6 to 0.55).

1.

If shorter heating cycles are desired, set the anticipator to a slightly lower setting.

2.

If longer heating cycles are desired, set the anticipator to a slightly higher setting.

1.

Loosely wrap exactly 10 coils of thermostat wire around the jaws of a split-jaw induction-type current meter (see fig. 5).

2.

With the subbase correctly wired to the heat pump system, attach one end of the 10-turn coil to terminal

R and attach the other end to terminal W1.

3.

With the heat pump system power on, center the coil on the meter jaws and read the current draw of the stage 2 heat relay on the meter and divide the reading by 10. This is the value that should be set on the adjustable anticipator.

Split jaw current meter

10 turns of wire

Figure 5. Current meter

Example:

Meter reads 6.0 amp

10 turns of wire

= 0.6 amp anticipator setting

4.

Turn power to heat pump system off, then remove coil leads from the subbase and move system switch to OFF.

.4

.5

.6

.8

1.0

.3

.25

L

O N

G ER

C

Y

S

.15

.2

.18

Arrow points to the matched current rating of the primary control

Move this lever to adjust heat anticipator

Figure 6. Anticipator adjustment

CALIBRATION ADJUSTMENT

This thermostat has been carefully adjusted at the factory and should not require recalibration.

A few degrees difference between the indicator setting of the thermostat and actual room temperature is not considered important. If the disagreement is appreciable, however, first make sure that the thermostat is properly located and leveled. Then, if recalibration still seems necessary, proceed as follows:

5.

Move temperature adjustment lever to correspond to actual room temperature. Then remove thermostat cover.

6.

Slip 7 ⁄

32

” wrench onto hex nut, holding temperature adjustment lever stationary, and turn hex nut counterclockwise until mercury just barely shifts to left end of tube. Then replace cover and set thermostat to desired temperature.

1.

Move temperature adjustment lever to a setting about

5

°

above room temperature.

2.

Remove thermostat cover. Slip 7 ⁄

32

” wrench onto hex nut beneath bimetal and hold temperature adjustment lever stationary. Turn hex nut clockwise until mercury shifts to right end of tube (see fig. 7).

3.

Move temperature adjustment lever to lowest setting.

4.

Replace thermostat cover. Wait 10 minutes for bimetal temperature to stabilize. Don’t stand near thermostat during this period as your breath and body heat will affect temperature of bimetal.

Bimetal

Temperature

Adjustment

Lever

7/32" Calibration

Wrench

Figure 7. Calibrating thermostat

5

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

Attn: Technical Service Department