White Rodgers 1E56 User Manual

TYPE 1E56

WHITE-RODGERS

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.

This low voltage thermostat is designed to provide conve­nient control of the heating/cooling system. To provide
greater room comfort, the sensitive spiral bimetal is com­bined with an adjustable heating anticipator and a fixed
cooling anticipator to provide maximum comfort.

Low Voltage Heating/Cooling Thermostat

INSTALLATION INSTRUCTIONS

DESCRIPTION

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.

CONTENTS

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

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

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

Select Thermostat Location
Route Wires to Location
Attach Subbase to Walls
Attach Thermostat to Subbase

Operation & Maintenance .................................. 5

Adjusting Heat Anticipator
Calibrating Thermostat

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.

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398

Printed in U.S.A.

PART NO. 37-2196B

Replaces 37-2196

9509

INSTALLATION

SELECT THERMOSTAT LOCATION

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.

1

thermostat wire

Stout cord with 6”

chain attached

Baseboard

strip moulding

Quarter round

removed

⁄2” hole for

1

⁄4” guide hole

for sighting

Approximately

5 feet from floor

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.

ROUTE WIRES TO LOCATION

NOTE

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

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

2. If a new location is chosen or if this is a new installation,
thermostat wiring must first be run to the location
selected.

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).

3

⁄4” hole in floor of partition

Hooked wire for snagging chain

Figure 1. Routing thermostat wires

ATTACH SUBBASE TO WALL

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.

1. Disconnect electrical power at main fuse or circuit
breaker.

2. Pull wires through opening near center of subbase and
connect wires beneath terminal screws (see figs. 2
and 3 for typical wiring for each application.

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

4. Position subbase over hole in wall and mark mounting
hole locations on wall.

5. Drill mounting holes.

6. 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.

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

2

Heating

Hot

24 VAC

Neutral

COOL

HEAT

Field Installed

Jumper

120 VAC

In “OFF” position
system switch breaks
both heating and
cooling circuits

AUTO

G

Fan

Relay

Fan

Switch

Cooling

Anticipator

COOL HEAT

ON

RCY

Cooling
System

System

Heating

System

Thermostat

Contacts

Anticipator

W

4

Figure 2. For installations where heating and

cooling systems are powered by the same transformer

Heating

Hot

24 VAC

Neutral

COOL

HEAT

In “OFF” position
system switch breaks
both heating and
cooling circuits

Hot

24 VAC

Neutral

120 VAC

Cooling Transformer

AUTO

G

Fan

Relay

Fan

Switch

Cooling

Anticipator

COOL HEAT

ON

RCY

Cooling
System

System

Heating
System

Thermostat

Contacts

Anticipator

W

4

Figure 3. For installations where heating system

is powered by a separate transformer

120 VAC

Heating Transformer

ATTACH THERMOSTAT TO SUBBASE

1. Remove cover from thermostat base by gripping the
base in one hand. Use the other hand to pull gently at
the top or bottom of the cover.

2. Carefully remove the shipping protective packing from
the switch.

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

4. Snap cover on thermostat and set switches and tem­perature lever to desired setpoint (see OPERATION
section).

5. Turn on power to the system.

This thermostat is easy to operate. Fig. 5
shows how the heating/cooling system
and fan operate when the switches are in
various positions. Use the system switch
to select either heating or cooling, or to
turn the heating/cooling system off. Use
the fan switch to control fan operation.
When the fan switch is in the AUTO
position, the fan will cycle with the heating
or cooling system (the fan will not run if
the system switch is in the OFF position
and the fan switch is in the AUTO posi­tion). When the fan switch is in the ON
position, the fan will run continuously,
regardless of system switch position (even
if the system switch is set to OFF, the fan
will run if the fan switch is in the ON
position).

Shows switch position

FAN

AUTO ON

Figure 5. Subbase switching and thermostat/system operation

70

60

50

50

60

70

80

Figure 4. Attach thermostat to subbase

SYSTEM

COOL OFF HEAT

Captive
screws

O

80

90

90

COVER

THERMOSTAT

BASE

ARH

Y

W

B

OPERATION &

MAINTENANCE

OPERATION

No heating; no cooling; no fan

No heating; no cooling; fan runs continuously
Cooling system cycles from thermostat; fan runs

continuously

Cooling system and fan cycle from thermostat

Heating system cycles from thermostat; fan cycles
from fan control on furnace

Heating system cycles from thermostat; fan runs
continuously

A
U
T

F

O

A
N

O

G

N

RC

C
O
O
L

S

O

Y

F

S

F

T
E

H

M

E
A
T

3

ADJUSTING HEAT ANTICIPATOR

CAUTION

!

The adjustable heat anticipator WILL BURN OUT
if 25 VAC is applied directly to the thermostat by
shorting out the primary control during testing.
This may cause personal injury and/or property
damage.

This thermostat is equipped with an adjustable heat
anticipator and was preset at the factory to provide
satisfactory operation of the heating system under normal
conditions. If additional adjustments are necessary, they
may be made as follows (see fig. 6):

1. Remove thermostat cover.

2. If heat cycle is too long, set heat anticipator to a slightly
lower dial setting (1⁄2 division).

3. If heat cycle is too short, set heat anticipator to a
slightly higher dial setting (1⁄2 division).

4. Replace thermostat cover.

CALIBRATING THERMOSTAT

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

Due to environmental conditions, during normal operation
there may be a few degrees of difference between the
indicator setting of the thermostat and actual room tem­perature. 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. Replace thermostat cover. Wait 10 minutes for bimetal
temperature to stabilize. Do not stand near the thermo­stat during this period, as your breath and body heat
will affect bimetal temperature.

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

7. Slip 7⁄32” wrench onto hex nut. While holding tempera­ture adjustment lever stationary, turn hex nut counter­clockwise until mercury just barely shifts to the left end
of the tube (see fig. 7).

8. Replace thermostat cover and set temperature adjust­ment lever to desired temperature. Turn on electrical
power to system.

.25

.3

.4

E

R

G

N

C

O

Y

C

L

E

S

.18

.15

.2

Move this lever

to adjust heat

anticipator

L

.5

.6

.8

1.

Arrow points to the

matched current rating

of the primary control

Figure 6. Anticipator adjustment

CAUTION

!

To prevent electrical shock and/or equipment
damage, disconnect electrical power to the sys­tem until recalibration is complete.

1. The anticipator’s heat may adversely affect thermostat
recalibration. To prevent this, disconnect electrical
power to the thermostat at the furnace, main fuse, or
breaker box.

2. Move temperature adjustment lever to a setting about
5° above room temperature.

3. Remove thermostat cover. Slip 7⁄32” wrench onto hex
nut beneath bimetal. While holding temperature ad­justment lever stationary, turn hex nut clockwise until
mercury shifts to the right end of the tube (see fig. 7).

4. Move temperature adjustment lever to lowest setting.

7

⁄

32

”

Calibration

wrench

Bimetal

Temperature

adjustment

lever

Figure 7. Calibrating thermostat