Lennox X4146 Installation Instructions Manual

E2005 Lennox Industries Inc.

Dallas, Texas, USA

Elite® Series 1 Heat / 1 Cool Programmable

Touch Screen Thermostat

INSTALLATION

INSTRUCTIONS

WARNING

This thermostat is to be installed by a qualified service technician or
other qualified agency in accordance with the manufacturer’s instruc­tions, all codes, and requirements of the authority having jurisdiction.

505,043M
10/2005

Page 2

Table of Contents

General...................................Page 2

Shipping and Packing List........Page 2

NecessaryTools.......................Page 2

Thermostat Location................Page 2

Remove Existing Thermostat...Page 3

Thermostat Installation............Page 4

Wiring Connections..................Page 4

LED Indicator...........................Page 5

Outdoor Temperature Sensor...Page 5

Field Wiring Diagrams..............Page 6

Install Batteries........................Page 8

Attach T’stat to Wallplate..........Page 8

Set Calendar and Clock............Page 8

Installer Set−Up........................Page 9

System Test...........................Page 15

Troubleshooting.....................Page 16

General

The Lennox Elite® Series X4146 ther­mostat provides control for single−
stage heating and cooling. The ther­mostat may be used to control either a
conventional HVAC system which in­cludes an outdoor condensing unit and
indoor furnace or a heat pump unit and
indoor air handler. The thermostat ter­minal block accommodates 24V power
common from the furnace or air han­dler. Three AAA alkaline batteries are
provided to be used as an alternate
power source or as a back−up in case
of an interruption of power.

Shipping and Packing List

Package 1 of 1 contains

1 − Assembled thermostat

(includes wallplate and thermostat)

1 − Bag assembly containing the fol-

lowing:

2 − Screws

2 − Wall anchors

3 − AAA alkaline batteries

1 − Installation instruction

1 − Owner’s guide

1 − Warranty certificate

Necessary Tools

• No. 2 Phillips screwdriver

• Standard pocket screwdriver

• Drill

• Drill bits (use 3/16" for drywall and

7/32" for plaster)

• Pencil

• Level

• Hammer

• Electrical tape

Thermostat Location

Install the thermostat about 5 feet
(1.5m) above the floor in an area with
good air circulation.

Do not install the thermostat where it
may be affected by the following:

• Drafts or dead spots behind doors
and in corners.

• Hot or cold air from ducts.

• Radiant heat from the sun or ap-

pliances.

• Concealed pipes or chimneys.

• Adjacent unconditioned areas

(outside wall behind the thermo­stat)

Page 3

Remove Existing Thermostat

If this thermostat is being used to re­place an existing thermostat, remove
the old thermostat:

1 − Turn off power at the heating and/or

cooling system or fuse/circuit
breaker panel.

2 − Remove the cover from the existing

thermostat.

3 − Remove securing screws and re-

move existing thermostat from wall
or wallplate. Disconnect the exist­ing wires.

4 − Remove any remaining portion of

the existing thermostat from the
wall. Do not install the replacement
thermostat faceplate on the exist­ing wallplate. Though the wall­plates may appear to be the same
and the faceplate may fit on the ex­isting wallplate, the terminal posi­tions may vary in important ways.
In addition, serial number and part
number information is carried on
the replacement wallplate.

Do not allow the thermostat wires
to fall behind the drywall.

WARNING

This thermostat must be
installed using the provided re­placement wallplate.

Failure to do so will bypass ther­mostat control and activate con­tinuous heating.

Y

G

C

R

W

OLD THERMOSTAT

.18

.

2

.

25

.

3

.

9

.

7
.

5

.

4

L
O

N

G

E

R

THERMOSTAT

COVER

WALLPLATE

WARNING

MERCURY NOTICE

If the existing thermostat includes a mercury bulb, the thermostat must
be disposed of properly.

Contact your local waste management authority for instructions re­garding recycling and proper disposal of thermostats which include
mercury bulbs.

Page 4

Thermostat Installation

The thermostat may be installed hori­zontally in a 4 in. X 2 in. (101.6 mm X

50.8 mm) wiring box or on the wall us­ing the provided anchors.

1 − Separate the wallplate from the

thermostat as shown.

THERMOSTAT

WALLPLATE

WIRE HOLE

2 − Pass the labeled wires through the

hole on the wallplate.

3 − Position the wallplate on the wall

with the arrow pointing up. Level
the wallplate (for appearance only)
and use a pencil to mark the mount­ing holes.

WALLPLATE

LEVEL

PLACE LEVEL ON
SUPPORT TABS

MARK
MOUNTING
HOLES (2)

4 − If anchors are used, move the wall-

plate aside and drill two new holes
(3/16" for drywall; 7/32" for plaster).

5 − Tap the provided wall anchors into

the drilled holes until the back of the
anchor head touches the wall sur­face.

6 − Position the wallplate over the an-

chors and pull the thermostat wires
back through the wiring opening.

7 − Secure the wallplate using the pro-

vided screws.

DRILLED
HOLES (2)

WALL
ANCHORS (2)

MOUNTING
SCREWS (2)

WALLPLATE

NOTE

Thermostat heat function will
not operate if thermostat has
been stored at, or is being used
in, ambient temperatures at or
above 90°F. Heat function will be
enabled after thermostat has
been placed in ambient tempera­tures less than 90°F for about 30
minutes.

Wiring Connections

WARNING

Use minimum 18 guage wire for
all thermostat connections.

IMPORTANT

Do not connect the wires to this
thermostat based on wire color.
Improper wiring may cause
damage to the HVAC system.

Page 5

1 − Make wiring connections per the

appropriate wiring diagram on
pages 6 and 7. Refer to the table
below for terminal designations.

Terminal Description

W

First−stage heating

(conventional)
S1 Remote outdoor sensor
S2 Remote outdoor sensor

R 24V power
O Reversing valve
B Reversing valve
G Fan relay

Y

First−stage compressor

(Conventional or

heat pump)

C 24V common

L Equipment monitor

2 − Refer to inner terminal labels when

using the thermostat with conven­tional systems (gas, oil or electric
heat plus air conditioning). Refer to
outer terminal labels in heat pump
applications. See figure below.

3 − Loosen screws of terminals that will

be used. Insert appropriate wires in
the terminal block under the loos­ened screws. Securely tighten
each screw.

C

Y

B

O

R

G

INSERT WIRE IN HOLE

WIRE HOLE

WALLPLATE

SCREW

TERMINALS

LETTER

DESIGNATIONS

LABELED WIRES

TERMINAL

BLOCK

4 − Connect wires to the correspond-

ing screw terminals per the ap­propriate diagram.

5 − Push excess wire back into the

wall.

6 − Plug hole with nonflammable in-

sulation to prevent drafts from af­fecting thermostat.

LED Indicator

An LED indicator is located in the up­per right corner of the thermostat. It is
only visible when lit.

When an equipment monitor is con­nected to the thermostat L terminal,
the LED lights when the monitor sends
a check or failure message to the ther­mostat.

The LED requires the use of 24Vac
common power. The indicator will not
light when the thermostat is powered
by the batteries alone, or when 24Vac
power is interrupted.

Outdoor Temperature Sensor

Install the optional outdoor tempera­ture sensor (X4148) as outlined in the
instructions provided with the sensor.

Page 6

Field Wiring Diagrams

TYPICAL COOL ONLY SYSTEM

TYPICAL CONVENTIONAL SINGLE−STAGE HEAT / COOL SYSTEM

Page 7

Field Wiring Diagrams (Continued)

TYPICAL HEAT ONLY SYSTEM WITH FAN

TYPICAL HEAT ONLY SYSTEM

Page 8

Install Batteries

1 − Install three provided AAA alkaline

batteries in the back of the thermo­stat as shown.

BACK OF THERMOSTAT

BATTERIES

(3)

+

+

+

2 − Remove tab from the lower right−

hand corner of the thermostat back
to activate the real−time clock.

REMOVE DURING

INSTALLATION

REMOVE
TAB

REMOVE DURING

INSTALLATION

Attach Thermostat to Wallplate

1 − Align the terminal blocks on the

walplate with the pins on the back
of thermostat.

2 − Push the thermostat straight onto

the pins until it snaps into place.

3 − Turn on power at the furnace or air

handler or at the fuse or circuit
breaker.

PINS ON

BACK OF

THERMOSTAT

WALLPLATE

TERMINAL
SCREW
BLOCK

Set Calendar and Clock

This thermostat is designed to auto­matically keep the current time and
date in memory for up to ten years, un­der normal use, once the calendar has
been set. When power is first applied to
the thermostat, the display is ready to
set the calendar.

1 − Use the arrow keys to set the year,

month and day.

2 − Press the DONE key.

DONE

USE

ARROWS

TO SET

YEAR

SET

CURRENT

DATE

SET

MONTH

MON WED THU FRI SATTUE

3 − Use the arrow keys to set the cur-

rent time.

4 − Press the DONE key.

DONE

MON WED THU FRI SAT

AM
PM

USE

ARROWS

TO SET

TIME

TUE

NOTE − Date and time may be ad­justed after the initial set−up using ei­ther the installer or user set−up menu.

Page 9

Installer Set−Up

Use the following steps and the Install­er Set−Up menu to match the thermo­stat to the HVAC system.

1 − Press and release the SYSTEM

key.

2 − Press and hold the two blank keys

on either side of the center blank
key for approximately five seconds.

MON

CANCEL

UET WED THU FRI SATAAT SUN

PM

SS M

EMHT

Y TE

COOL

FOLLOWING

SCHEDULE

SET TO

OFF

DONE

3 − Release the two keys when the

thermostat display matches the
display below.

DONE

4 − Refer to the following figure to see

how the thermostat keys are used
to make selections from the set−up
menu.

DONE

INSTALLER

SET−UP

NUMBER

CURRENT

SETTING

ADVANCE TO NEXT

INSTALLER SET−UP

EXIT

INSTALLER

SET−UP

CHANGE THE

CURRENT

SETTING

5 − The installer set−up number is dis-

played on the left−hand side of the
screen. The current installer set−up
number is displayed on the right−
hand side of the screen. Use the up
and down arrows on the right−hand
side of the thermostat to select the
proper setting for that particular
set−up number.

6 − After the proper selection has been

made, use the up arrow in the cen­ter of the thermostat to advance to
the next set−up screen.

7 − Refer to the tables on pages 10

through 14 to make proper set−up
choices for your application.

8 − When all set−up selections have

been made, press the DONE key to
save your settings. Thermostat dis­play will return to the main screen.

NOTE − Press and release the SYS­TEM key, then press and hold the cen­ter blank key to access the user set−up
screens. The user set−up options are
limited to those features that would be
used by the homeowner. Press the
DONE key when finished.

Page 10

Installer

Set−Up

Number

Installer

Set−Up

Name

Selection Description

(Factory setting in bold print)

Notes

0120

Date

(Year/first)

Select first two digits of current calendar
year (20 for 2005, etc.)

Factory setting = 20.

0130

Date

(Year/last)

Select last two digits of current calendar
year (05 for 2005, etc.); 01 to 99 available.

0140

Date

(Month)

Select number that represents current cal­endar month. Factory setting = 8.

0150

Date

(Day)

Select number that represents current cal­endar date. Factory setting = 19.

Schedule

0 − Non−programmable.

0160

Schedule

Options

4 − 7−day programming. Factory setting.

1 − Single−Stage Heating and Cooling
(Conventional). Factory setting.

Available
options

-

2 − Single−Stage Heat Pump with No Back−
Up or Auxiliary Heat.

and de

­faults vary
by system

System

3 − Heat Only without Fan (Conventional)

−− Gas, oil or electric heating without cen­tral air conditioning.

type

.

System
type
selection

0170

T

ype

4 − Heat Only with Fan (Conventional).

automati­cally

5 − Hot Water Heat Only (Conventional) −−
Gas or oil hot water heat. Power open/
power close hot water zone valves or nor­mally open valves.

modifies
certain
default
settings
and

6 − Cooling Only (Conventional) −− Central
air conditioning only.

installer
set−up
options.

0180

Fan

Control

0 − Gas or Oil Heat −− Heating system
controls fan during heating demand.
Factory setting.

Available

only if

conven-

tional

system

chosen.

Settin

g

0180

Control

Heating

1 − Electric Heat −− Thermostat control fan
during heating demand.

Setting

defaults to

electric

heat if

heat
pump is
chosen.

Page 11

Installer

Set−Up

Number

Installer

Set−Up

Name

Selection Description

(Factory setting in bold print)

Notes

0220

Cycles
per Hour
(cph) 1st

Stage

Compres-

sor

3 − Recommended setting for
compressors. Factory setting.

Settings of 1 − 6 cph available.

1 − Recommended for use with steam and
gravity.

Cycles
per Hour

3 − Recommended for use with hot water
heat and high−efficiency (90% or higher)
furnaces.

Shown

only when

0240

(cph) 1st

Stage

Conven-

tional

5 − Recommended for use with stan­dard−efficiency (less than 90%) fossil
fuel furnaces. Factory setting.

y

conven-

tional sys-

tem is

Heating

9 − Recommended for use with electric
furnaces.

selected

.

Settings of 1 − 12 cph available.

Continu-

0 − Backlight not lit continuously. Back­light comes on when key is pressed.
Factory setting.

Option
always

shown;

however,

0280

Continu

ous

Backlight

1 − Backlight is continuously lit.
(Thermostat must be powered by 24V
common wire for this feature to be
allowed.)

however,

t’stat must

be pow-

ered by

24V com-

mon.

Change-

0 − Manual changeover from heating
mode to cooling mode. Factory setting.

0300

Change

over

1 − Auto−changeover from heating mode to
cooling mode.

2 − 2°F (1.5°C)

Deadband

3 − 3°F (2°C). Factory setting.

Opti

on

(Mini

mum

4 − 4°F (2.5°C)

shown

only when

differential

between

5 − 5°F (3°C)

only when

auto−

0310

between

heating

6 − 6°F (3.5°C)

auto

change-

heating

and

7 − 7°F (4°C)

g

over has

cooling

8 − 8°F (4.5°C)

been

setpoints)

9 − 9°F (5°C)

selected.

Tempera-

0 − Fahrenheit (factory setting).

0320

t

ure Dis-

play Scale

1 − Celsius

Page 12

Installer

Set−Up

Number

Installer

Set−Up

Name

Selection Description

(Factory setting in bold print)

Notes

0 − Daylight savings disabled.

Set to 0 in

areas that

0330

Daylight

Savings

1 − Daylight savings enabled.
Factory setting.

d

o not

follow

daylight

savings.

0 − No remote outdoor temperature
sensor. Factory setting.

Defaults

and

options

depend

on system

0340

Remote

Outdoor
Tempera­ture Sen-

sor

1 − Outdoor temperature sensor used for
display only.

on system

type

selection.

When set-

ting 0210

is set to 0,

so

2 − Outdoor temperature sensor used to
control heat pump lock−out settings.

is set to 0

,

setting

defaults to

2 and

item is not

shown.

0 − Filter change reminder off.
Factory setting.

1 − 10 run time days.

Filter

2 − 30 run time days.

Run time

0500

Change

3 − 60 run time days.

based on

call for

Reminder

4 − 90 run time days.

fan.

5 − 120 run time days.

6 − 365 run time days.

Humidifier

0 − Humidifier pad replacement remind­er off. Factory setting.

0510

Pad

Re

p

lace-

1 − 90 run time days.

0510

Replace

ment Re-

2 − 180 run time days.

minder

3 − 365 run time days.

0520

UV Lamp

Replace-

0 − UV lamp replacement reminder off.

Factory setting.

0520

ment Re-

minder

1 − 365 run time days.

Page 13

Installer

Set−Up

Number

Installer

Set−Up

Name

Selection Description

(Factory setting in bold print)

Notes

0 − Conventional Recovery −− System
starts recovery at programmed time.

0530

Ad

aptive
Intelligent
Recovery

1 − Adaptive Intelligent Recovery −− Sys­tem starts recovery early so that set­point is reached by the start of the pro­gram period. Factory setting.

Number

2 − Two periods (wake and sleep) avail­able.

Shown

only when

program-

mable is

0540

Number

of Periods

4 − Four periods (wake, leave, return,
sleep) available. Factory setting.

chosen

.

Setting

applies to

all days of

the week.

0580

Minimum

Compres-

sor− Off

Time

Settings of 0 − 5 available.

5 − Five−minute compressor−off time
setting. Factory setting.

0600

Heat

Tempera-

ture

Range(°F)

Settings of 40 − 90 available in 1°F incre­ments.

Factory setting = 90.

Shown in

1/2°C

increments

0610

Cool

Tempera-

ture

Range

(°F)

Settings of 50 − 99 available in 1°F incre­ments.

Factory setting = 50.

Shown in

1/2°C

increments

Clock

12 − 12−hour clock. Factory setting.

0640

Clock

Format

24 − 24−hour clock.

0650

Heating

Mode

Extended

0 − No extended fan operation after
heating demand satisfied.
Factory setting.

Not

shown

when fan

operation

is set to

0650

Extended

Fan On

Time

90 − Fan operation continues for 90 sec­onds after heating demand satisfied.

is set to

fossil fuel
or in cool

only sys-

tems.

0660

Cooling

Mode

Extended

0 − No extended fan operation after
cooling demand satisfied.
Factory setting.

Not

shown in

0660

Extended

Fan On

Time

90 − Fan operation continues for 90 sec­onds after cooling demand satisfied.

heat

only

systems.

Page 14

Installer

Set−Up

Number

Installer

Set−Up

Name

Selection Description

(Factory setting in bold print)

Notes

0 − Keypad unlocked −− all functions are
available. Factory setting.

0670

Keypad

Lock−Out

1 − Keypad partially locked −− only temp. up
and down keys and ability to enter installer
set−up mode and modify set−up selections
are enabled.

2 − Keypad fully locked −− only ability to en­ter installer set−up mode and modify set−up
selections are enabled.

Heating

1 − Less aggressive control. Select this
setting if temperature is overshooting the
setpoint. Heating may turn off before the
setpoint is reached.

Applies to

recovery

ramp and

0680

g

Mode

2 − Standard control. Factory setting.

p

use of

Temp

.

Control

3 − More aggressive control. Select this
setting if temperature is undershooting the
setpoint. Heating may remain on after the
setpoint is reached.

auxiliary

heat

during

recovery.

Cooling

1 − Less aggressive control. (Cooling may
turn off before setpoint reached).

0690

g

Mode

2 − Standard control. Factory setting.

Applies to

recovery

Temp

.

Control

3 − More aggressive control. (Cooling may
remain on after setpoint reached).

y

ramp.

−3°F (−1.5°C).

−2°F (−1°C).

−1°F (−.5°C).

0700

Temp.

Display

Offset

0 − No difference in displayed tempera­ture and actual room temperature.
Factory setting.

1°F (.5°C).

2°F (1.5°C).

3°F (2°C).

0 − No thermostat reset. Factory setting.

Only

calendar

0710

R

ese

t

Thermo-

stat

1 − Resets all installer set−up options to
default values and resets schedule to de­fault setting.

calendar

settings

and time

are re­tained.

Page 15

System Test

The system test function allows the in­staller to check the HVAC system after
the thermostat set−up has been com­pleted. The system test function is ac­cessed through the installer set−up
menu.

1 − Press and release the SYSTEM

key.

2 − Press and hold the two blank keys

on either side of the center blank
key for approximately five seconds,
until the screen changes.

3 − Use the down arrow in the center of

the thermostat to reach the installer

test selections.

4 − The installer test number is dis-

played on the left−hand side of the
screen. The factory setting for the
test screen is displayed on the
right−hand side of the screen. Use
the up and down arrows on the
right−hand side of the thermostat to
select the desired test option.

5 − Refer to the following table to select

proper test options.

CAUTION − While the system is in
the test mode, the compressor mini­mum off time is bypassed.

Installer

Test

Number

Installer

Set−Up

Name

Selection Description

Installer Test

0 − Cooling is off (factory setting).

Test 1

Installer Test

Cool

1 − Cooling is activated.

Installer Test

0 − Fan is off (factory setting).

Test 2

Installer Test

Fan

1 − Fan is activated.

Installer Test

0 − Heating is off (factory setting).

Test 3

Installer Test

Heat

1 − Heat is activated.

Page 16

Troubleshooting

Symptom Possible Cause Action

Display does not come Thermostat is not being

Check to see that there
is 24V between R and C
terminals.

Display does not come

on.

Thermostat is not being

powered.

Check to see that
batteries are properly
installed.

Check temperature
setpoints.

Temperature settings do
not change.

Upper or lower tempera­ture limits were reached.

Check installer set−up
numbers 0600 and

0610. Modify, if neces­sary.

g

Keypad is fully locked.

Check installer set−up
numbers 0670 and
change keypad lock
option, if necessary.

Thermostat minimum−off
time is activated.

Wait up to 5 minutes for
the system to respond.

Heating or cooling does

System selection has
not been set to heat or
cool.

Select proper system
mode.

not come on

.

System type selection is
incorrect.

Check installer set−up
number 0170 and make
sure proper system type
is selected.

Check wiring.

Thermostat is calling for
heat (Heat ON) or cool
(Cool ON); but HVAC

Heating or cooling
equipment is not

Check installer set−up
number 0170 and make
sure proper system type
is selected.

()

system is not operating.

operating

.

Verify operation of
equipment in system
test mode.

Thermostat does not
respond when touch
screen is pressed.

Keypad is fully locked.

Check installer set−up
numbers 0670 and
change keypad lock op­tion, if necessary.

NOTE − Perform installer system tests (page 15) to verify thermostat control
of HVAC system.