INSTEON 2441V, T1800 Quick Start Manual

Quick-Start Guide

INSTEON™ Thermostat Adapter, Totaline™ / Venstar™

Model: #2441V

Introduction

LED

The INSTEON Thermostat Adapter adds remote control and monitoring to 3
compatible models of Totaline
plugs into the bottom of compatible thermostats and communicates via
INSTEON RF giving you wireless remote control and monitoring from
anywhere in your home, or the world.
The 3 compatible models are:

1-Day Programmable Venstar Thermostat (30410A)
7-Day Programmable Venstar Thermostat (30411A)

7-Day Programmable, Dual-Fuel Venstar Thermostat (30412A)

Note: To use the above mentioned thermostats, make sure your install
location’s wiring has 5 wires or check with a local installer.

TM

/ VenstarTM brand thermostats. It simply

INSTEON Thermostat Adapter

Installation

1) Simply plug the INSTEON Thermostat Adapter into the jack on the bottom of your thermostat

Green LED will turn on

Un-Install

1) Open the front cover of the thermostat by gently pulling the right edge of the cover towards you

2) While pressing firmly on the small round button (center, bottom of thermostat) pull down gently on the INSTEON Thermostat Adapter

INSTEON Thermostat Adapter will disconnect from the thermostat

Adding your Thermostat Adapter to a Scene on an INSTEON Compatible Controller

Button

For example, let’s say you would like to remotely control your thermostat to 73 degrees, heat mode from the comfort and convenience of your couch,
using the Scene A button on your RemoteLinc (If you want to use another INSTEON Compatible Controller, see its user manual)
Note: Linking your Adapter to a scene allows your thermostat to go to a chosen setting.

Here, you will link your Scene A button to “recall” both the setpoints and mode of the thermostat.

1) Tap the mode button on your thermostat until the mode indicated is heat

2) Tap the up and/or down arrows on your thermostat until the temperature set point is 73 degrees

3) Press & hold the top of the Scene A button on your RemoteLinc (for about 10 seconds) until it beeps

LED will start blinking (Press & hold for 10 seconds works for just about every INSTEON-compatible Controller;
please check the controller’s owner’s manual if you need help)

4) Press & hold the button on the INSTEON Thermostat Adapter (for about 5 seconds)

LCD display on your thermostat will briefly display all its characters, then return to normal
INSTEON Adapter’s LED will blink off faintly, then return to steady on
RemoteLinc will beep and its LED will stop blinking

5) Tap the mode button on your thermostat (this will temporarily change the operating mode to allow you to test your remote control)

Your thermostat’s mode will change to cool

6) Now to test your new link, tap the Scene A (up arrow) on your RemoteLinc

Your thermostat should return to heat mode with a 73-degree set point

7) Repeat steps 1 through 6 for as many scenes and setpoints on your INSTEON-Compatible Controller as you wish.

Note: Sending an Off command will not change the mode or setpoints of the thermostat. These commands are ignored to minimize unintended results.
Note: Different set points can be linked to different buttons should you need more flexibility.

Page 1 of 2
Rev. 20080213

Quick-Start Guide INSTEON Thermostat Adapter

Removing from a Scene

1) Put your Controller into “Delete from Scene” mode (usually “Unlinking” mode (two 10-second press & holds) – please check its Owner’s Manual if

you need help)

2) Press & hold the INSTEON Thermostat Adapter’s button for about 5 seconds

The LCD display on your thermostat will briefly display all its characters, then return to normal
The INSTEON Adapter’s LED will blink off faintly, then return to steady on

Factory Reset

1) Unplug the INSTEON Thermostat Adapter from your thermostat (see Un-Install section on page 1 for details)

2) Press & hold the button on the INSTEON Thermostat Adapter

3) While continuing to hold the button, plug the INSTEON Thermostat Adapter back into your thermostat

4) Continue to hold the button for approximately 5 seconds

All user settings will be erased and the unit restored to its factory settings

Advanced Operations

Using software, you will be able to integrate the automation of your thermostat with the wide array of INSTEON compatible products saving you
time and energy. For example, applications can include having an email sent to you if the temperature goes above or below any chosen set points,
have a “goodbye” scene automatically set back your thermostat, etc. – the applications are almost endless. Check with your favorite INSTEON
Compatible Software for their latest support for this product.

Specifications FCC Compliance Statement

INSTEON communications RF

INSTEON Controller functionality Not supported

INSTEON Responder functionality Supported

INSTEON message repeating Supported, always on

Mode control Heat, Cool, Auto, OFF

Fan control On, Auto

Degree format Fahrenheit (Celsius is not available)

Maximum number of INSTEON
scenes / links

All Linking Supported (10 sec set button push n hold)

Unlink Supported (10 seconds press n hold, twice)

Heat set point Supports all set points of Thermostat

Cool set point Supports all set points of Thermostat

Temperature status request Supported

Humidity status request Supported

Mode status request Supported

Fan status request Supported

X10 Not supported

Dimensions 2.89” W x 1.75” H x 0.58” D

LED Green

Interconnect type Male, RJ10 4 conductor (aka RJ22)

Input power 5VDC, 30 ma max (supplied by thermostat)

Installation Indoor use only

Approvals FCC, Industry Canada

Warranty 2 years

417

This device complies with FCC Rules Part 15.
Operation is subject to two conditions:

(1) This device may not cause harmful interference,
and

(2) this device must accept any interference that
may be received or that may cause undesired
operation. The digital circuitry of this device has
been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide
reasonable protection against harmful interference
in residential installations. This equipment
generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance
with the instructions, may cause harmful
interference to radio and television reception.
However, there is no guarantee that interference will
not occur in a particular installation. If this device
does cause such interference, which can be verified
by turning the device off and on, the user is
encouraged to eliminate the interference by one or
more of the following measures:

x Re-orient or re-locate the receiving antenna of

the device experiencing the interference.

x Increase the distance between this device

and the receiver.

x Connect the device to an AC outlet on a

circuit different from the one that supplies
power to the receiver.

x Consult the dealer or an experienced radio/TV

technician.

WARNING! Changes or modifications to this unit
not expressly approved by the party responsible for
compliance could void the user's authority to
operate the equipment.

SmartLabs Limited Warranty – SmartLabs warrants to the original consumer of this product that, for a period of two years from the date of purchase, this product will be free from defects in material and

For HELP

workmanship and will perform in substantial conformity to the description of the product in the owner's manual and/or quick start guide. This warranty shall not apply to defects or errors caused by misuse
or neglect. © Copyright 2008 SmartLabs, 16542 Millikan Ave., Irvine, CA 92606-5027 – 866-243-8018 www.smartlabsinc.com

, call our friendly tech support @ 866-243-8018

Page 2 of 2
Rev. 20080213

Digital

Digital

Thermostat

Thermostat

residential

THERMOSTAT

800

T1

7-DAY

7-DAY

PROGRAMMABLE

PROGRAMMABLE

Control up to 3 Heat &
2 Cool Stages
3 Configurable Outputs
Adjustable 2nd & 3rd Stage
Timers & Deadbands
Backlit Display & Button
Legends
Aux Heat Indicator

up to

up to

& 2-cool

& 2-cool

HEAT
COOL

Outdoor Sensor Ready
with High/Low Readouts
for the Day
Accepts Optional Humidity Module:
Controls Humidification and
Dehumidification
Accepts EZ Programmer
Accepts Optional IR Remote Control
Accepts Comfort Call
Phone Control Accessory

3-heat

3-heat

HEAT
PUMP

Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.

INSTALLATION

INSTALLATION

INSTRUCTIONS

INSTRUCTIONS

Venstar Inc. 08/07

CAUTION

Follow the Installation Instructions before proceeding.
Set the thermostat mode to “OFF” prior to changing
settings in setup or restoring Factory Defaults.

CAUTION

NEVER PUT MORE THAN ONE
JUMPER ON THE SAME MISC
JUMPER BLOCK!

THIS MAY DAMAGE YOUR
THERMOSTAT AND VOID
YOUR WARRANTY.

MISC3

OK

NOTE: Due to variations in environmental conditions, it is not

MISC3

always possible to achieve the desired humidification or
dehumidification setpoint.

This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.

Thermostat T1800

Tested to Comply

c

with FCC Standards

C

F

4Z95

FOR HOME OR OFFICE USE

Page

i

Table of Contents

Preparation

Remove & Replace the
Old Thermostat
Configuring the MISC
Outputs

Wire Connections

Wiring Diagrams

Test Operation

Calibrating the
Thermostat Sensors

TroubleShooting

1
2
3
4
5
6
7
8

Page iii

SECTION 1

Preparation

1

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accomplished by following these step by step
instructions. If you are unsure about any of these
steps, call a qualified technician for assistance.

Proper installation of the thermostat will be

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Assemble tools

Flat Blade
Screwdriver

Wire cutter
& Stripper

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Make sure your Heater/Air Conditioner is working

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properly before beginning installation of the
thermostat.

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Carefully unpack the thermostat. Save the screws,

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bracket, and instructions.

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Turn off the power to the Heating/Air Conditioning

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system at the main fuse panel. Most residential
systems have a separate breaker for disconnecting
power to the furnace.

Page 1.1

SECTION 2

Remove & Replace the Old Thermostat

2

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Remove the cover of the old thermostat.
If it does not come off easily check for screws.

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Loosen the screws holding the thermostat
base or subbase to the wall, and lift away.

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Disconnect the wires from the old thermostat.
Tape the ends of the wires as you disconnect
them, and mark them with the letter of the
terminal for easy reconnection to the new
thermostat.

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Keep the old thermostat for reference purposes,
until your new thermostat is functioning properly.

Page 2.1

SECTION 3

Configuring the MISC Outputs

3

Section 3 Contents:

Configuring the Jumpers........3.2

Explanation of Jumper

Settings..................................3.3

Page 3.1

C

Configuring the Jumpers

For additional flexibility, your thermostat has three configurable
outputs. These outputs are designed to have different functions
depending on how the jumpers are set (below).
Each output, labeled MISC1, MISC2, and MISC3 may be set for one
of the five choices available.
In the diagram below, the MISC3 jumper has been set for HUM*
(humidification) operation, the MISC2 jumper has been set for
DEHUM* (dehumidification) operation, and the MISC1 jumper has
been set for W3 (3rd stage of heat) operation.

(FAN)

DEHUM

MISC2

W3

HUM

W1

Y1

MISC3 MISC2 MISC1

G

R

C

(MISC1
ONLY)

ELEC

GAS

HP

GAS

Y2

HUM

NO HUM

2

8

4

6

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

1

3

579

B

O

W2

MISC1

RS2

MISC3

RS+5

Z

X
1

Rs1

RSGND

Y

W3

HUM

DEHUM

MISC3 MISC2 MISC1

3

Y2

(MISC1

ONLY)

CAUTION

NEVER PUT MORE THAN

ONE JUMPER ON THE SAME

MISC JUMPER BLOCK!

DOING SO MAY DAMAGE

YOUR THERMOSTAT AND

VOID THE WARRANTY.

*The Humidity Module (sold separately) must
be installed to operate a humidification
and/or dehumidification system.

Page 3.2

MISC3

OK

MISC3

Explanation of Jumper Settings

3

W3 MULTI-STAGE OPERATION EXPLAINED - SECTION 13 of the Owner’s
Manual

The 3rd Stage of Heat is turned on when:

(A) The 1st and 2nd stages have been on for the time required (steps #22
and #23, page 13.6). It is adjustable from 0-60 minutes and the default

And

is two minutes.
(B) The temperature from the setpoint is equal to or greater than: the set-

point plus the 1st stage deadband (step #19, 13.5), plus the 2nd stage
deadband (step #20, 13.5) plus the 3rd stage deadband (step #21,

13.5). This 3rd stage deadband is adjustable from 0-10 degrees and

the default is two degrees.

If the jumper for MISC1, MISC2, or MISC3 is set to W3, the corresponding MISC screw
terminal on the backplate will control a third stage of heat.

Cooling

1st Stage

turn on

3rd Stage

turn on

2nd Stage

turn on

Heating

Deadband Deadband DeadbandDeadbandDeadband

1st Stage

turn on

db 1 db 1db 2 db 2db 3

(adj. 1-6 )(adj. 0-10 )(adj. 0-10 ) (adj. 0-10 )(adj. 1-6 )

Heat

Setpoint

Cool

Setpoint

2nd Stage

turn on

W3 JUMPER SETTING

DECREASE INCREASE

TEMPERATURE

HUM JUMPER SETTING

If the jumper for MISC1, MISC2, or MISC3 is set to HUM,
terminal on the backplate will control a humidification system.

HUMIDIFICATION OPERATION - SECTION 9 of the Owner’s Manual

If your HVAC unit is equipped with a humidification system and the
Humidity Module (sold separately) has been installed, the thermostat will
provide power to the MISC1, MISC2, or MISC3 terminal of the thermostat
when the humidity in the home falls below the humidity setpoint you have
chosen. The value for this setpoint ranges from 0% to 60%. If no
humidity is desired or if a humidification system has not been installed, set
the value to OFF.

Page 3.3

the corresponding MISC screw

Explanation of Jumper Settings (continued)

DEHUM JUMPER SETTING

If the jumper for MISC1, MISC2, or MISC3 is set to DEHUM,
terminal on the backplate will be connected to the dehumidification terminal of a furnace board.
NOTE: Not all furnaces have a dehumidification terminal.

DEHUMIDIFICATION OPERATION - SECTION 10 of the Owner’s Manual

If your HVAC unit is equipped with a dehumidification system the thermostat will
operate in one of two ways.

1) Normally Closed (NC): The thermostat will de-energize the MISC1, MISC2,
or MISC3 terminal of the thermostat (this MISC terminal is connected to the
DEHUM terminal on your furnace) to allow the fan to run in low speed when
the humidity in the home is above the dehumidify setpoint you have chosen
and there is a call for 1st stage cooling.

2) Normally Open (NO): The thermostat will energize the MISC1, MISC2, or
MISC3 terminal of the thermostat (this MISC terminal is connected to the
DEHUM terminal on your furnace) to allow the fan to run in low speed when
the humidity in the home is above the dehumidify setpoint you have chosen
and there is a call for 1st stage cooling.

the corresponding MISC screw

3

Page 3.4

Explanation of Jumper Settings (continued)

3

Y2 JUMPER SETTING

If the jumper for MISC1 is set to Y2 the
second stage of cooling.

MISC1 screw terminal on the backplate will control a

Y2 OPERATION - SECTION 13 of the Owner’s Manual

Control up to two Cool stages.
The 2nd Stage of heat or cool is turned on when:
(A) The 1st Stage has been on for the time required (step #22,
page 13.6). It is adjustable from 0-60 minutes and the default
is two minutes.

And

(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the deadband (step #20, page 13.5), plus
the 2nd deadband (step #20, page 13.5). This 2nd deadband is
adjustable from 0-10 degrees and the default is two degrees.

db 1 db 2

Cooling

DeadbandDeadband

(adj. 0-10 )(adj. 1-6 )

TEMPERATURE

Cool

Setpoint

1st Stage

turn on

INCREASE

Page 3.5

2nd Stage

turn on

SECTION 4

Wire Connections

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If the terminal designations on your old thermostat
do not match those on the new thermostat, refer

to the chart below, or the wiring diagrams
that follow.

Wire from the

old thermostat

terminal marked

G or F Fan G

Y1, Y or C

W1, W or H

C

O/B

W2

MISC1

Function

Cooling Y1

Heating

PowerRh, R, M, Vr, A R

Common

Rev. Valve

2nd Stage Heat

Configurable Output #1

4

Install on the

new thermostat

connector marked

W1/O/B

C

W1/O/B*

W2

MISC1

MISC2

MISC3

RS+5

RS1

RSGND

RS2

* O/B is used if your system is a Heat Pump.
** For instructions on connecting these terminals see page 14.2
of the Owner’s Manual.

Configurable Output #2

Configurable Output #3

Remote Sensor +5vdc

Remote Sensor Signal

Remote Sensor Ground

Remote Sensor Signal #2

Page 4.1

MISC2

MISC3

RS+5**

RS1**

RSGND**

RS2**

SECTION 5

Sample Wiring Diagrams

Section 5 Contents:

5

HVAC Equipment Wiring............5.2

MISC1, MISC2, and MISC3

Wiring........................................5.6

Page 5.1

6 Wire, 1 Stage Cooling, 1 Stage Heat

Residential & Commercial 1 Stage Cooling,
with 1st stage Gas Heat

OR

Commercial Heat Pump 1 Stage Cooling
with 2 Stage Heat

5

(FAN)

ELEC

GAS

HP

GAS

B

O

24 vac common

HUM

DEHUM

MISC2

W3

MISC3 MISC2 MISC1

W1

Y1

G

R

C

W2
MISC1
RS2
MISC3

RS+5
RS1
RSGND

Y2

(MISC1
ONLY)

HUM

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

C

W1/O/B

Y1

G

MISC2

R
C

(FAN)
ELEC

GAS

HP

GAS

B

O

W2

MISC1

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.

24 vac return

fan relay

compressor relay

1st stage heat circuit

2nd stage heat circuit

R

G

Y1

W1

W2

Page 5.2

6 Wire, 1 Stage Cooling, 1 Stage Heat

Residential & Commercial 1 Stage Cooling,
with 1st stage Electric Heat

5

(FAN)

ELEC

GAS

HP

GAS

B

O

24 vac common

DEHUM

MISC2

W3

HUM

W1

Y1

G

C

MISC3 MISC2 MISC1

R

W2
MISC1
RS2
MISC3

RS+5
RS1
RSGND

Y2

(MISC1
ONLY)

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

W1/O/B

Y1

G

MISC2

R

C

(FAN)
ELEC

GAS

HP

GAS

B

O

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.

24 vac return

fan relay

compressor relay

1st stage heat circuit

2nd stage heat circuit

RC

G

Y1

W1

W2

Page 5.3

6 Wire, 1 Stage Cooling, 2 Stage Heat

Residential Heat Pump with O Reversing
Valve 1 Stage Cooling, with 2 stage Heat

5

(FAN)

ELEC

GAS

HP

GAS

B

O

24 vac common

HUM

DEHUM

MISC2

W3

MISC3 MISC2 MISC1

W1

Y1

G

R

C

W2
MISC1
RS2
MISC3

RS+5
RS1
RSGND

Y2

(MISC1
ONLY)

HUM

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

W1/O/B

Y1

G

MISC2

R
C

(FAN)
ELEC

GAS

HP

GAS

B

O

W2

MISC1

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.

24 vac return

Fan Relay

Compressor Relay

Reversing Valve

2nd stage heat circuit

RC

G

Y1

O

W2

Page 5.4

6 Wire, 1 Stage Cooling, 2 Stage Heat

Residential Heat Pump with b Reversing
Valve 1 Stage Cooling, with 2 stage Heat

5

(FAN)

ELEC

GAS

HP

GAS

B

O

24 vac common

HUM

DEHUM

MISC2

W3

W1

Y1

G

R

C

MISC3 MISC2 MISC1

W2
MISC1
RS2
MISC3

RS+5
RS1
RSGND

Y2

(MISC1
ONLY)

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

W1/O/B

Y1

G

MISC2

R
C

(FAN)
ELEC

GAS

HP

GAS

B

O

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

6 Conductor 18 gauge
unshielded cable from the
thermostat to the equipment.

24 vac return

Fan Relay

Compressor Relay

Reversing Valve

2nd stage heat circuit

RC

G

Y1

b

W2

Page 5.5

Adding a (MISC1) and (MISC3)2nd Stage of Cooling 3rd Stage of Heating

5

W3

HUM

DEHUM

W2
MISC1
RS2
MISC3

RS+5
RS1
RSGND

MISC3 MISC2 MISC1

Y2

(MISC1

ONLY)

HUM

DEHUM

MISC2

W3

MISC3 MISC2 MISC1

W1

Y1

G

R

C

W1/O/B

Y1

MISC2

Y2

(MISC1
ONLY)

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

G

R
C

HUM

(FAN)
ELEC

GAS

HP

GAS

B

O

W2

MISC1

NO HUM

RS2

MISC3

RS+5

RS1

RSGND

3rd Stage Heat

2nd Stage Cooling

W3

Y2

Page 5.6

Adding a Humidification System (MISC1) and Dehumidification System (MISC2)*.

5

W3

HUM

DEHUM

MISC3 MISC2

W2
MISC1
RS2
MISC3

RS+5
RS1
RSGND

MISC1

Y2

(MISC1

ONLY)

PROG

HUM

DEHUM

MISC2

W3

MISC3 MISC2 MISC1

W1

Y1

G

R

C

W1/O/B

Y1

G

MISC2

R

C

(FAN)

ELEC

GAS

HP

2

4

INSTALL HUMIDITY

1

3

GAS

B

O

W2

MISC1

HUM

NO HUM

RS2

MISC3

RS+5

Z

8

6

X

RS1

1

RSGND

Y

579

Y2

(MISC1

ONLY)

MODULE WITH SENSING

ELEMENT OUTWARD

Humidity Module

(Sold Separately)

2

4

6

HUM

NO HUM

Z

8

X

1

Dehumidification
System

Humidification
System

* Requires Humidity Module.

Page 5.7

1

3

579

Y

SECTION 6

Test Operation

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Turn the power on to the Heating/Air Conditioning
system.

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Press the MODE button repeatedly until the
HEAT icon appears on the display. Press

the

6

Up or Down buttons until the set temperature is
10 degrees above room temperature. The
furnace should turn on.

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Press the MODE button repeatedly until the
COOL icon appears on the display.

Press the Up
or Down buttons until the set temperature is 10
degrees below room temperature. The air
conditioner should turn on. NOTE: Most

equipment has a time delay of 5 minutes between
cool cycles. This feature is defeatable on the
thermostat. Consult the Owner's Manual under
Setup, cycles per hour.

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Press the UP button until the setpoint is equal to
the room temperature. Press the FAN
button to Fan On. The fan should turn on and run
continuously.

Page 6.1

SECTION 7

Calibrating the Thermostat Sensors

Under normal circumstances it will not be necessary to adjust the
calibration of the temperature and humidity sensors. If calibration is
required, please contact a trained HVAC technician to correctly
perform the following procedure.

7

MODE

MODE

PRESS

TWICE

Place the thermostat in the
OFF mode.

Press
button. While holding the
MODE button, press and hold
the FAN button for 5 seconds.

FA N

Press the UP and buttons
at the same time twice. The
thermostat temperature will be
displayed and may be calibrated
using the UP or DOWN buttons.

All icons will appear on the
display.

THERMOSTAT SENSOR

and hold the MODE

DOWN

I2:00

Su

OFF

Pm

72

Program On

Am

I8:88

SuMoTuWeThFrSa

Service Filter

AUTO
OFFON

Morning
DayNight
Evening

FanOn

Pm

StartStop

DeHumidify

I88

Setup

H

I

88

Outside

Vacation

AUXH

L

O

88

CALIBRATE

C

OOL

EAT

REMOTE SENSOR

Press the MODE button once. The
remote sensor temperature will be

MODE

MODE

displayed and may be calibrated using the
UP or DOWN buttons. If a remote sensor
is not installed, only dashes will appear.

HUMIDITY SENSOR

Press the MODE button once. The
relative humidity at the thermostat will be
displayed and may be calibrated using the
UP or DOWN buttons.

After calibration is complete, press the MODE button once to return to
normal operation.

Page 7.1

Outside

CALIBRATE

CALIBRATE

SECTION 8

TroubleShooting

Pm

I2:00

AUTO

SYMPTOM: The air conditioning does not attempt to

74

C

OOL

H

EAT

72

turn on.
CAUSE: The compressor timer lockout may prevent the
air conditioner from turning on, for a period of time.
REMEDY: Consult the Owner's Manual in the Setup
section to defeat the cycles per hour and
compressor timeguard.

8

Pm

I2:00

AUTO

SYMPTOM: The display is blank.

74

C

OOL

H

EAT

72

CAUSE: Lack of proper power.
REMEDY: Make sure power is turned on to the furnace

and that you have 24vac between R & W. If C is
used, 24vac between R & C.

Pm

I2:00

AUTO

SYMPTOM: The air conditioning does not attempt to

74

C

OOL

H

EAT

72

turn on.

CAUSE: The cooling setpoint is set too high.
REMEDY: Consult the Owner's Manual in the Setup

section to lower the cooling setpoint limit.

Pm

I2:00

AUTO

SYMPTOM: The heating does not attempt to turn on.

74

C

OOL

H

EAT

72

CAUSE: The heating setpoint is set too low.
REMEDY: Consult the Owner's Manual in the Setup

section to raise the heating setpoint limit.

Page 8.1

TroubleShooting

Pm

I2:00

74

C

8

OOL

AUTO

H

EAT

72

Pm

I2:00

74

C

OOL

AUTO

H

EAT

72

SYMPTOM: When controlling a residential heat pump,
and asking for cooling, the heat comes on.
CAUSE: The thermostat reversing valve jumper is set
for “b”.
REMEDY: Set the reversing valve jumper for “O”. See
pages 5.4 and 5.5.

SYMPTOM: When calling for cooling, both the heat
and cool come on.
CAUSE: The thermostat equipment jumper is configured
for “HP” and the HVAC unit is a Gas/Electric.
REMEDY: Set the equipment jumper for “Gas”. See
pages 5.2 and 5.3.

Page 8.2

P/N 88-598
Rev. 1

Digital

Digital

Thermostat

Thermostat

residential

THERMOSTAT

800

T1

7-DAY

7-DAY

PROGRAMMABLE

PROGRAMMABLE

Control up to 3 Heat &
2 Cool Stages
3 Configurable Outputs
Adjustable 2nd & 3rd Stage
Timers & Deadbands
Backlit Display & Button
Legends
Aux Heat Indicator

up to

up to

& 2-cool

& 2-cool

HEAT
COOL

Outdoor Sensor Ready
with High/Low Readouts
for the Day
Accepts Optional Humidity Module:
Controls Humidification and
Dehumidification
Accepts EZ Programmer
Accepts Optional IR Remote Control
Accepts Comfort Call
Phone Control Accessory

3-heat

3-heat

HEAT
PUMP

Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.

OWNER’S

OWNER’S

MANUAL

MANUAL

Venstar Inc. 08/07

CAUTION

Follow the Installation Instructions before proceeding.
Set the thermostat mode to “OFF” prior to changing
settings in setup or restoring Factory Defaults.

CAUTION

NEVER PUT MORE THAN ONE
JUMPER ON THE SAME MISC
JUMPER BLOCK!

THIS MAY DAMAGE YOUR
THERMOSTAT AND VOID
YOUR WARRANTY.

MISC3

OK

NOTE: Due to variations in environmental conditions, it is not

MISC3

always possible to achieve the desired humidification or
dehumidification setpoint.

This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.

Thermostat T1800

Tested to Comply

c

with FCC Standards

C

F

4Z95

FOR HOME OR OFFICE USE

Page

i

Timers and Deadbands

How to Use This Manual

The Table of Contents divides the thermostat features into sections

making it easier to quickly find information.

The first page of each section contains a more detailed Contents of each

section, such as the example page shown below.

SECTION 14

Header shows section #

Section 14 Contents:

Adjusting the Heat/Cool

Differential..............................14.2

Adjusting the Cycles

Per Hour..................................14.3

Adjusting the Deadband..........14.4

Adjusting the Minutes of
Run-Time Before the

Next Stage...............................14.6

Selecting 2nd Stage Turn

Off Temperature.....................14.7

and title of section

Section contents

14

Visible section tab
on the side of the
page

Section and page #

Page 14.1

In addition, this manual also has an Index to help you find any information

regarding this thermostat quickly.

Page

ii

Glossary of Terms

Auto-Changeover: A mode in which the thermostat will turn on
the heating or cooling based on room temperature demand.
Configurable Output Jumper: Using jumpers on the thermostat
you can configure the MISC1, MISC2, and MISC3 terminals to
operate with regards to humidification, dehumidification, 2nd
stage cooling, 3rd stage heating, and a programmable output.
Cool Setpoint: The warmest temperature that the space should
rise to before cooling is turned on (without regards to
deadband).
Deadband: The number of degrees the thermostat will wait, once
setpoint has been reached, before energizing heating or cooling.

Dehumidify: To reduce the amount of moisture in the air.
Differential: The forced temperature difference between the
heat setpoint and the cool setpoint.
Heat Setpoint: The coolest temperature that the space should

drop to before heating is turned on (without regards to
deadband).

Humidify: To increase the amount of moisture in the air.
Icon: The word or symbol that appears on the thermostat

display.
Mode: The current operating condition of the thermostat (i.e. Off,
Heat, Cool, Auto, Program On).
Non-Programmable Thermostat: A thermostat that does not
have the capability of running the Time Period Programming.
Programmable Thermostat: A thermostat that has the capability
of running the Time Period Programming.

Temperature Swing: Same as Deadband.
Time Period Programming: A program that allows the

thermostat to automatically adjust the heat setpoint and/or the
cool setpoint based on the time of day.

Page

iii

Table of Contents

Getting to Know Your
Thermostat

Quick Start

Setting Clock and Day

Basic Operation

Viewing Temperature
and Humidity Sensors

Programming the
Daily Schedule

Programming the
Fan Operation

Thermostat Display
Options

Humidification

Dehumidification

Viewing Equipment
Run-Times

Electric Heat and
Heat Pump Operation

1
2
3
4
5
6
7
8

9
10
11
12

Timers and Deadbands
Programming Remote

Sensor Operation
Energy Save

Operation
Programming the Run-

Time Alerts
Programming the

Vacation Mode
Configuring the MISC

Outputs
Factory Defaults and

Calibration

Accessories

Advanced Setup Table

13
14
15
16
17
18
19
20
21

Page iv

SECTION 1

Getting to Know Your Thermostat

1

Section 1 Contents:

Front Panel Buttons.....................1.2

Display Features...........................1.3

Page 1.1

Front Panel

HUMIDITY

PROGRAM SET CLOCK

FAN

MODE

VACATION

OUTDOOR

1

Backlit LCD Display

Pm

I2:00

Mo

AUTO

74

C

H

OOL

EAT

72

Heat or Cool Demand Indicator

Red = Heat, Green = Cool

Mode
Button

Warmer Button sometimes referred
(glows red)

to as the UP button

[]

Cooler Button sometimes refer-
(glows blue)

DOWN button

red to as the

[]

QUICK RELEASE FOR
ACCESSORY PORT

(pg. 20.1)

FAN

PLATINUM

COMMERCIAL PROGRAMMABLE THERMOSTAT

I2:00

Su

AUTO

OUTDOOR

eries

Pm

HUMIDITY

Page 1.2

74

C

H

72

OOL

EAT

PROGRAM

SET CLOCK

VACATION

Display Features

1

1

1

D

Am

I8:88

SuMoTuWeThFrSa

Service Filter

UV Light

AUTO

OFFON

Morning
DayNight
Evening

FanOn

Mode Indicators ­ Selects the operational mode of the equipment.
HEAT - Indicates the heating mode.
COOL - Indicates the air conditioning mode.
AUTO - Indicates the system will automatically changeover
between heat and cool modes as the temperature varies.
OFF - Indicates heating and cooling is turned off.
PROGRAM ON - Indicates the time period program is enabled to
run.
Clock with Day of the Week - Section 3
Indicates the current time and day. This clock is also used to program
the time period schedule.

Pm

I88

Section 4

Program On

StartStop

DeHumidify

Setup

A

L

H

I

88

C

OOL

Outside

Vacation

UXHEAT

O

88

Room Temperature Display - Section 5
Indicates the current room temperature and displays the outdoor
temperature when selected.

Desired Set Temperature - Section 4/5
Indicates desired room temperature(s). Also displays the highest
and lowest temperatures for the day.

Outside icon - Section 5
Indicates the temperature displayed is from the optional outdoor
sensor.

Page 1.3

Display Features

1

Am

I8:88

SuMoTuWeThFrSa

Service Filter

UV Light

AUTO

OFFON

Morning
DayNight
Evening

FanOn

Morning, Day, Evening & Night icons - Section 6

Indicates the day part of the time period program.

Setup icon ­ Indicates the thermostat is in the setup mode.

Sections 6-17

Pm

I88

Program On

StartStop

DeHumidify

Setup

A

L

H

I

88

C

Outside

Vacation

UXHEAT

O

88

OOL

Fan On icon -

Indicates constant, continuous fan operation.
When Fan On is not lit - indicates the fan will only operate when
necessary to heat or to cool.

Service Filter icon ­ Appears when the filter should be serviced under normal conditions.
Adjustable from 0 - 1950 hours of blower operation.

icon ­ Indicates the keypad has been locked.

StartStop icon ­ Appears when programming timer functions.

UV Light icon ­ Appears when the UV bulb should be serviced under normal
conditions. Adjustable from 0 - 1990 days of operation.

Section 7

Section 8

Section 6

Section 19

Section 16

Page 1.4

Display Features

1

Am

I8:88

SuMoTuWeThFrSa

Service Filter

UV Light

AUTO

OFFON

Morning
DayNight
Evening

FanOn

Vacation icon -

Indicates the thermostat has Vacation setpoints in use.

Pm

I88

Section 17

Program On

StartStop

DeHumidify

Setup

A

L

H

I

88

C

OOL

Outside

Vacation

UXHEAT

O

88

AuxHeat icon - Page 13.4
Indicates 2nd stage electric strip heat is being used when the
thermostat is programmed for Heat Pump operation.

Humidify/DeHumidify icon ­ Indicates the system is currently humidifying/dehumidifying the air.

Lo icon ­ Indicates the lowest recorded outdoor temperature for the day.

Hi icon ­ Indicates the highest recorded outdoor temperature for the day.

Section 5

Section 5

Sections 9/10

Page 1.5

SECTION 2

Quick Start

Section 2 Contents:

Setting the Clock and Day...........2.2

Selecting the Heat or Cool

Mode............................................2.3

2

Selecting Your Desired

Temperature................................2.4

Using the Fan Button...................2.4

Note: Following the instructions in this section will allow you to

operate your thermostat using the factory default settings. These
settings are depicted in the illustrations throughout this manual.

Page 2.1

Setting the Clock

Setting the Day

GRAM SET CLOCK

MO

VACATION

GRAM SET CLOCK

MO

VACATION

2

Press the SET
CLOCK button

During Setup & Programming:

Pressing the UP or DOWN
buttons will modify the flashing

I2:00

Am

Mo

Press the SET
CLOCK button

Setup

Setup

I

2

selection.

To adjust the

Clock or Day use

Press

MODE

buttons.

To adjust the time by
hours press and hold
the FAN button while
pressing the UP or
DOWN buttons.

to return to
normal operation.

Page 2.2

Selecting the Heat or Cool Mode

Select Mode by Pressing the MODE Button

2

Heating Only

The HEAT setting indicates the

temperature the room has to
reach before the furnace will

turn on to heat the room.

Cooling Only

The COOL setting indicates the

temperature the room has to

reach before the air conditioner

will turn on to cool the room.

Heating or Cooling

AUTO will automatically select

heat or cool based on room

temperature demand.

I2:00

Su

I2:00

Su

I2:00

Su

AUTO

Pm

70

Pm

70

Pm

70

H

EAT

68

76

C

OOL

76

C

OOL

H

EAT

68

Press

MODE

Press

MODE

Press

Time Schedule for
Heating or Cooling

The Program On setting will

activate the time period

programming for the cooling

or heating setpoint ONLY

(Morning, Day, Evening

& Night Periods).

Off

OFF indicates both heating

and air conditioning

systems are turned off.

Program On

I2:00

Su

Day

Pm

70

I2:00

Su

OFF

Pm

70

Page 2.3

76

C

OOL

H

EAT

68

MODE

Press

MODE

Selecting Your Desired Temperature (adjusting the setpoints)

Using the Fan Button

2

AUTO OR PROGRAM MODE

Pressing the UP or DOWN buttons in Auto or Program mode
will adjust both the heat and cool set temperatures
simultaneously.

I2:00

Su

AUTO

HEAT OR COOL MODE

Pressing the UP or DOWN buttons in Heat or Cool mode will
adjust only the heat or cool set temperature.

Pm

70

76

C

OOL

H

EAT

68

Adjust the desired

set temperature with the

buttons.

I2:00

Su

Pm

70

I2:00

Su

AUTO

FanOn

Pm

70

76

C

OOL

76

C

OOL

H

EAT

68

Adjust the desired

set temperature with the

buttons.

Press

FAN

Fan On indicates constant fan
operation. You may turn the fan
on even if the thermostat is in the
Off mode. Pressing the FAN button
toggles this feature on or off.

Page 2.4

SECTION 3

Setting the Clock and Day

Section 3 Contents:

Setting the Clock..........................3.2

Setting the Day.............................3.2

3

Note: During setup & programming pressing the UP or DOWN
buttons will modify the flashing selection.

Page 3.1

Setting the Clock

Setting the Day

GRAM SET CLOCK

MO

VACATION

GRAM SET CLOCK

MO

VACATION

3

Press the SET
CLOCK button

During Setup & Programming:

Pressing the UP or DOWN
buttons will modify the flashing
selection.

I2:00

Am

Mo

Press the SET
CLOCK button

Setup

Setup

I

2

To adjust the

Clock or Day use

Press

MODE

buttons.

To adjust the time by
hours press and hold
the FAN button while
pressing the UP or
DOWN buttons.

to return to
normal operation.

Page 3.2

SECTION 4

Basic Operation

Section 4 Contents:

Programmable or Non-

Programmable Thermostat........4.2

4

Manual or Auto-Changeover

Thermostat..................................4.3

Selecting the Operating Mode....4.4

Selecting Your Desired

Temperature................................4.8

Note: During setup & programming pressing the UP or DOWN

buttons will modify the flashing selection.

Page 4.1

Programmable or Non-Programmable
Thermostat

When the very simplest operation is desired, this thermostat

4

If ‘NO’ is selected, the thermostat will lockout the Program On screen;
only the Off, Heat, Cool, and Auto screens may be accessed by
pressing the MODE button.

Select ‘YES’ if you would like your thermostat to be programmable,
then the Program mode will be accessible through the use of the
MODE button.

PROGRAM

may be configured to be non-programmable, with or without
Auto-Changeover. Follow the step below.

Note: Press the MODE
button momentarily

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

to move through the
setup screens. Press
and hold the
button to move back­wards th rough th e
setup screens.

MODE

YES

Select Yes if you would like
the thermostat to be program­mable or No for non-program­mable.

NO

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Program On

Setup

i

PROGRAM

Page 4.2

Press

Manual or Auto-Changeover
Thermostat

When the very simplest operation is desired, this thermostat may

be configured to be a manual heat and cool thermostat, with or

4

without time period programmability. Follow the step below.

The thermostat may be programmed to function as a Heat Only or
Cool Only thermostat by selecting ‘NO’ in the setup screen below.
This will lockout the Auto-Changeover screen and only allow the Off,
Heat, Cool, and Program On screens to be accessed.

MODE

PROGRAM

MODE

YES

Select Yes if you would
like the thermostat to
be Auto-Changeover or
No for a Heat Only and
Cool Only Thermostat.

NO

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

AUTO

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

2

Press

PROGRAM

MODE

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 4.3

Operating Mode when the Thermostat
is Configured to be:

NON-PROGRAMMABLE WITH MANUAL-CHANGEOVER - If the
thermostat is configured to be a non-programmable thermostat with

4

Manual-Changeover, the following screens will be available by
pressing the MODE button.

Select the Mode by Pressing the MODE Button

Heating Only

The HEAT setting indicates the

temperature the room has to

reach before the furnace will

turn on to heat the room.

Cooling Only

The COOL setting indicates the

temperature the room has to

reach before the air conditioner

will turn on to cool the room.

Off

OFF indicates both heating

and air conditioning

systems are turned off.

I2:00

Su

I2:00

Su

I2:00

Su

OFF

Pm

70

Pm

70

Pm

H

EAT

68

76

C

OOL

Press

MODE

Press

MODE

70

Page 4.4

Operating Mode when the Thermostat
is Configured to be:

NON-PROGRAMMABLE WITH AUTO-CHANGEOVER - If the
thermostat is configured to be a non-programmable thermostat
with Auto-Changeover, the following screens will be available by
pressing the MODE button

Select the Mode by Pressing the MODE Button

4

Heating Only

The HEAT setting indicates the

temperature the room has to
reach before the furnace will

turn on to heat the room.

Cooling Only

The COOL setting indicates the

temperature the room has to

reach before the air conditioner

will turn on to cool the room.

Heating or Cooling

AUTO will automatically select

heat or cool based on room

temperature demand.

I2:00

Su

I2:00

Su

I2:00

Su

AUTO

Pm

70

Pm

70

Pm

H

EAT

68

76

C

OOL

76

C

OOL

H

EAT

Press

MODE

Press

MODE

Off

OFF indicates both heating

and air conditioning

systems are turned off.

70

I2:00

Su

OFF

Pm

70

Page 4.5

68

Press

MODE

Operating Mode when the Thermostat
is Configured to be:

PROGRAMMABLE WITH MANUAL-CHANGEOVER - If the thermostat is
configured to be a programmable thermostat with Manual-Changeover, the
following screens will be available by pressing the MODE button.

4

Select the Mode by Pressing the MODE Button

Heating Only

The HEAT setting indicates the

temperature the room has to
reach before the furnace will

turn on to heat the room.

Cooling Only

The COOL setting indicates the

temperature the room has to

reach before the air conditioner

will turn on to cool the room.

Time Schedule for
Heating Only

The HEAT Program On setting

will activate the time period

program for the heating

setpoint ONLY (Morning, Day,

Evening & Night Periods).

Time Schedule for
Cooling Only

The COOL Program On setting

will activate the time period

program for the cooling

setpoint ONLY (Morning, Day,

Evening & Night Periods).

Off

OFF indicates both heating

and air conditioning

systems are turned off.

I2:00

Su

I2:00

Su

I2:00

Su

Day

I2:00

Su

Day

I2:00

Su

OFF

Pm

70

Pm

70

Program On

Pm

70

Program On

Pm

70

Pm

H

EAT

68

76

C

OOL

H

EAT

68

76

C

OOL

Press

MODE

Press

MODE

Press

MODE

Press

MODE

70

Page 4.6

Operating Mode when the Thermostat
is Configured to be:

PROGRAMMABLE WITH AUTO-CHANGEOVER - If the thermostat is
configured to be a programmable thermostat with Auto-Changeover,
the following screens will be available by pressing the MODE button.

Select the Mode by Pressing the MODE Button

4

Heating Only

The HEAT setting indicates the

temperature the room has to
reach before the furnace will

turn on to heat the room.

Cooling Only

The COOL setting indicates the

temperature the room has to

reach before the air conditioner

will turn on to cool the room.

Heating or Cooling

AUTO will automatically select

heat or cool based on room

temperature demand.

Time Schedule for
Heating or Cooling

The Program On setting will

activate the time period

programming for the cooling

or heating setpoint ONLY

(Morning, Day, Evening

& Night Periods).

Off

OFF indicates both heating

and air conditioning

systems are turned off.

I2:00

Su

I2:00

Su

I2:00

Su

AUTO

I2:00

Su

Day

I2:00

Su

OFF

Pm

70

Pm

70

Pm

70

Program On

Pm

70

Pm

H

EAT

68

76

C

OOL

76

C

OOL

H

EAT

68

76

C

OOL

H

EAT

68

Press

MODE

Press

MODE

Press

MODE

Press

MODE

70

Page 4.7

Selecting Your Desired Temperature (adjusting setpoints)

AUTO OR PROGRAM MODE
Pressing the UP or DOWN buttons in Auto or Program

4

modes will adjust both the heat and cool set temperatures
simultaneously. For more information on this see page 13.2.

Adjust the desired

I2:00

Su

AUTO

HEAT OR COOL MODE

Pressing the UP or DOWN buttons in Heat or Cool modes will
adjust only the heat or cool set temperature.

Pm

70

76

C

OOL

H

EAT

68

set temperature with the

buttons.

I2:00

Su

Pm

70

76

C

OOL

Page 4.8

Adjust the desired

set temperature with the

buttons.

SECTION 5

Viewing the Temperature and Humidity Sensors

Section 5 Contents:

Viewing the Outdoor

Temperature..............................5.2

5

Viewing the Indoor

Humidity....................................5.3

Page 5.1

Viewing the Outdoor Temperature

HUM

N

OUTDOOR

HUM

N

OUTDOOR

This requires an outdoor sensor (optional accessory) to be installed
(see page 14.2 for wiring instructions). To read the temperature
from the outdoor sensor, press the OUTDOOR button. The display
will then show the current outdoor temperature along with the
highest and lowest temperatures for the day. The day starts at

5

12:00 am.

The highest and lowest
temperatures for the day
will be displayed along
with the current outdoor
temperature. This
reading is from the sensor
connected to RS2.

This reading is from the
sensor connected to
RS1.

Press the OUTDOOR
button.

83

HI

92

Outside

LO

68

High temperature
for the day.

Current outdoor
temperature.

Low temperature
for the day.

Press

MODE

Press the OUTDOOR
button to return to
normal operation.

Note: If no sensors are connected 2 dashes [- -] will appear on the display.

78

Page 5.2

Viewing the Indoor Humidity

Requires the Humidity Module (optional accessory) to be
installed. To display the current humidity at the thermostat,
press the HUMIDITY button of the thermostat. The display will
then show the current indoor humidity along with the
humidification setpoint (Section 9).

Note: The humidity reading will not appear unless the Humidity
Module has been installed. If a sensor has not been installed
dashes will appear in place of the humidity reading.

5

HUMIDITY

Current Room Humidity

To view the indoor humidity
reading, press the
HUMIDITY button

40

Humidify

Setup

I

0

Press the HUMIDITY button
again to return the display
to normal operation.

Press

HUMIDITY

NOTE: Due to variations in environmental conditions, it is not always possible
to achieve the desired humidification or dehumidification setpoint.

Page 5.3

SECTION 6

Programming the Daily Schedule

Section 6 Contents:

6

Programming a Daily

Schedule...................................6.2

Page 6.1

Programming a Daily Schedule

Press

PROGRAM

Press the PROGRAM button to enter time period programming.

Use the Programming Worksheet on the back cover
to help with this section.

Select the day of week

(Mo - Su)

Adjust the start time
for Morning.

Adjust the cooling
setpoint for Morning.

Mo

6:00

Mo

Morning

6:00

Mo

Am

Am

Start

78

C

OOL

6

Press

MODE

Press

MODE

(35 - 99 )

Adjust the heating
setpoint for Morning.

(35 - 99 )

Morning

6:00

Mo

Morning

Am

Page 6.2

78

C

OOL

H

EAT

70

Continued

Press

MODE

Press

MODE

Adjust the start time
for Day.

8:00

Mo

Day

Am

Start

Press

MODE

6

Adjust the cooling
setpoint for Day.

(35 - 99 )

Adjust the heating
setpoint for Day.

(35 - 99 )

Adjust the start time
for Evening.

8:00

Mo

Day

8:00

Mo

Day

6:00

Mo

Am

Am

Pm

Start

85

C

OOL

85

C

OOL

H

EAT

62

Press

MODE

Press

MODE

Adjust the cooling
setpoint for Evening.

(35 - 99 )

Evening

6:00

Mo

Evening

Pm

Page 6.3

78

C

Continued

Press

MODE

OOL

Press

MODE

Adjust the heating
setpoint for Evening.

(35 - 99 )

6:00

Mo

Evening

Pm

78

C

OOL

H

EAT

70

Press

MODE

6

Adjust the start time
for Night.

Adjust the cooling
setpoint for Night.

(35 - 99 )

Adjust the heating
setpoint for Night

(35 - 99 )

I0:00

Mo

Night

I0:00

Mo

Night

I0:00

Mo

Night

Pm

Pm

Pm

Start

82

C

OOL

82

C

OOL

H

EAT

62

Press

MODE

Press

MODE

Press

MODE

Continued

Page 6.4

6

The copy command becomes available after

programming the entire previous day.

Yes

Tu

Select Yes to copy the
previous day’s program
to this day displayed.

No

If Yes is selected:

Selecting Yes, then pressing mode will copy the

Press

MODE

If No is selected, as in previous steps, flashing prompts for input will appear for
the four time periods for the next day.

Press

PROGRAM

After programming for all seven days is complete, press the PROGRAM button to
leave the Setup screens. If no buttons are pressed, the display will leave the setup
screens after 30 seconds.

previous day’s program. If yes is selected again,
or each time, this routine will repeat.

If No is selected:

Press

MODE

Page 6.5

SECTION 7

Programming the Fan Operation

Section 7 Contents:

Using the Fan Button.................7.2

Programming the Fan................7.3

Setting the Fan-Off Time

Delay..........................................7.4

7

Page 7.1

Using the Fan Button

When the fan is set for automatic operation it will energize any time
there is a call for heating or cooling, otherwise the fan will remain off.
Pressing the FAN button will energize the fan and display the FanOn
icon on the thermostat display. To operate the fan in the automatic
mode, press the FAN button again and the FanOn icon will disappear.

Press

7

FAN

I2:00

Su

AUTO

FanOn

Pm

70

76

C

OOL

H

EAT

68

Fan On indicates constant fan
operation. You may turn the fan
on even if the thermostat is in the
Off mode. Pressing the FAN button
toggles this feature on or off.

Page 7.2

Programming the Fan

This timer will start the fan at the top of each hour and the fan will run
for the number of minutes selected in step #3. Steps 4 & 5 restrict the
hours during which the programmable fan may operate; step #4 is the
start time and step #5 is the stop time. Selecting the same start and
stop times will cause the fan to operate 24 hours a day.

MODE

PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Adjust the Programmable
Fan timer.
0 - 60 minutes.
0:00 = off

Adjust the Programmable
Fan start time. (step 4
appears only if step 3
is not 0:00)

0:00

FanOn

7:00

Am

Start

Setup

Setup

3

4

7

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

MODE

Press

MODE

Press

Adjust the Programmable
Fan stop time. (step 5
appears only if step 3
is not 0:00)

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

FanOn

9:00

OFF

FanOn

Pm

Page 7.3

MODE

Setup

Stop

5

Press

PROGRAM

Setting the Fan-Off Time Delay

To increase the cooling efficiency of your unit, the thermostat may be
programmed to continue running the fan after a call for cooling has
been satisfied. This delay may be set for 30, 60, or 90 seconds. If
the Fan Off Delay is set for zero seconds, the fan will not energize
after a call for cooling has been satisfied.

7

MODE

PROGRAM

MODE

Press the PROGRAM button to leave the Setup screens. If no buttons are

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

:00

6

Set the Fan Off Delay
to 0, 30, 60, or 90
seconds.

FanOn

pressed, the display will leave the setup screens after 30 seconds.

MODE

Press

PROGRAM

Page 7.4

SECTION 8

Thermostat Display Options

Section 8 Contents:

Turning On/Off the

Backlight...................................8.2

Programming the Thermostat

8

to Display Temperature in

Fahrenheit or Celsius..............8.2

Locking/Unlocking the

Keypad......................................8.3

Page 8.1

T

Turning On/Off the Backlight

Programming the Thermostat to Display
Temperature in Fahrenheit or Celsius

MODE

PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

8

Setup

Select backlight operation:
AUTO - Light from 6pm to
6am nightly.

ON - Light continuously.
OFF - Light for 8 seconds

after a button press.

AUTO

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

MODE

7

Press

MODE

C

Select thermostat
operation in degrees
Fahrenheit or Celsius.

F

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 8.2

Setup

f

8

Press

PROGRAM

Locking/Unlocking the Keypad

To prevent unauthorized use of the thermostat, the front panel
buttons may be disabled. To disable, or ‘lock’ the keypad, press
and hold the MODE button. While holding the MODE button,
press the UP and DOWN buttons together. The icon will
appear on the display, then release the buttons.

Press all three

buttons in the order

outlined above for

keypad lockout

I2:00

Su

AUTO

MODE

Pm

65

85

C

H

55

OOL

EAT

8

To unlock the keypad,
holding the MODE button, press the UP and DOWN buttons
together. The icon will disappear from the display, then
release the buttons.

press and hold the MODE button. While

Page 8.3

SECTION 9

Humidification

Section 9 Contents:

Installing the Humidity

Module.......................................9.2

Configuring a Thermostat Output
Jumper for Humidity

Operation...................................9.3

9

Adjusting the Humidification

Setpoint.....................................9.4

Energizing the Fan with

Humidification..........................9.5

NOTE: The humidification functions described in this section will
only be available if a Humidity Module has been properly installed.

Disclaimer:

The manufacturer of this thermostat cannot be liable for
misinstallation, improper connection or improper programming of
the humidity functions of this thermostat that may result in water
damage or mold growth.

Additionally, the manufacturer of this thermostat is not responsible
for the fitness of the humidifier and/or installation of said humidifier
connected to this thermostat. Furthermore, the maintenance of the
humidifier components, including but not limited to, the filters and
pads are not the responsibility of the thermostat manufacturer.

The Humidifier Service icon is only a suggestive reminder and
should not take the place of the humidifier manufacturer’s
required maintenance requirements and schedule.

Page 9.1

Installing the Humidity Module

To install the Humidity Module the thermostat must be detached
from the back plate. Plug the Humidity Module into the Humidity
Module connector as shown in Figure 2 below. Follow the detailed
instructions included with the Humidity Module accessory. Once the
Humidity Module has been installed, you must adjust the Humidity
jumper setting to HUM as shown in Figure 1 below. This will allow
you to access the humidification and dehumidification setup steps.

Back of T1800

For proper humidity operation, this
jumper must be set for HUM.

Figure 1

HUM

9

DEHUM

W3

HUM

W1

MISC2

MISC3 MISC2 MISC1

Y1

G

R

C

Y2

(MISC1
ONLY)

(FAN)

ELEC

GAS

HP

GAS

B

O

W2

HUM

NO HUM

2

8

4

6

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

1

3

579

MISC1

RS2

MISC3

RS+5

Z

X

Rs1

1

RSGND

Y

Figure 2

Humidity Module

Thermostat Circuit
Board.

OR

NO HUM

Install the Humidity Module

(see Humidity Module Instruction
Sheet for more detailed information).

Humidity Module
Plug located on
the Thermostat
Circuit Board.

Page 9.2

Setting a Thermostat Output Jumper
for Humidity Operation

To control a MISC output for humidification,

install the Humidity
Module and place the Humidity Jumper on HUM (see previous page).
Then place the MISC1, MISC2, or MISC3 jumper on the terminal
labeled HUM (see diagram below). This will supply 24VAC to the
selected MISC terminal based on the humidification programming in
the following pages. Only one of the three outputs (MISC1, MISC2,
or MISC3) is required to have this jumper. For more information

regarding the MISC1, MISC2, and MISC3 outputs, please see
section 18.

9

In the diagram below, the MISC3 jumper
has been set for HUM (humidify) operation.

(FAN)

ELEC

GAS

HP

GAS

B

O

W2

MISC1

RS2

MISC3

RS+5

Z

X
1

Rs1

RSGND

Y

HUM

DEHUM

HUM

DEHUM

MISC2

W3

W1

Y1

G

C

MISC3 MISC2 MISC1

R

(MISC1

Y2

ONLY)

HUM

NO HUM

2

8

4

6

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

1

3

579

W3

MISC3 MISC2 MISC1

(MISC1

ONLY)

Y2

MISC3

MISC3

OK

IMPORTANT CAUTION

NEVER PUT MORE THAN ONE JUMPER

ON THE SAME MISC JUMPER BLOCK!

THIS MAY DAMAGE YOUR THERMOSTAT

AND VOID YOUR WARRANTY

Page 9.3

Adjusting the Humidification Setpoint

If your HVAC unit is equipped with a humidification system and the
Humidity Module has been installed, the thermostat will provide power
to the appropriate terminal on the backplate of the thermostat when
the humidity in the home falls below the setpoint you have chosen.
The value for this setpoint ranges from 0% to 60%.

NOTE: Due to variations in environmental conditions, it is not always possible
to achieve the desired humidification or dehumidification setpoint.

HUMIDITY

Press the HUMIDITY
button to enter the
Humidity Setup screen.

NOTE: Each step # is located at

the top right corner of the
display for easy reference.

9

Current Room Humidity

Adjust the desired
humidification setpoint

(0%-60%)

40

Humidify

0

Press the HUMIDITY button to leave the
Humidity Control screens (if no buttons are
pressed, the display will leave the Humidity
Control screens after 30 seconds).

Setup

I

Press

HUMIDITY

Humidification Notes: Press the button to set the humidity
setpoint to 0% for no humidification operation.

You cannot set the dehumidify setpoint any lower than the humidify setpoint; a
5% differential is forced between the humidify and dehumidify setpoints.

Page 9.4

E

Energizing the Fan with Humidification

Selecting YES for this setup step will enable the Fan to automatically
energize any time there is a call for humidity. The HUM/NO HUM
jumper must be set for HUM in order to access this setup step. If NO
is selected, the Fan will not automatically energize on a call for
humidity.

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM

PROGRAM

9

MODE

Step 9 only appears if the HUM/NO HUM jumper is
set for HUM (see page 9.2) and the Humidification
setpoint is not 0% (see page 9.4).

Press the PROGRAM button to leave the Setup screens. If no buttons are

button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Select fan operation with
a call for humidification:
NO: Fan will not energize
when there is a call
for humidification.

YES: Fan will energize
when there is a call
for humidification.

pressed, the display will leave the setup screens after 30 seconds.

FanOn

Humidify

Setup

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

PROGRAM

MODE

Press

Page 9.5

SECTION 10

Dehumidification

Section 10 Contents:

Configuring a Thermostat Output
Jumper for Dehumidification

Operation................................10.2

Adjusting the Dehumidification

10

Setpoint...................................10.3

Using Your Air Conditioner

to Dehumidify.........................10.4

Using the DEHUM

Terminal..................................10.5

NOTE: The dehumidification functions described in this section will
only be available if a Humidity Module has been properly installed.
For instructions on installing the Humidity Module please see page 9.2.

Page 10.1

Setting a Thermostat Jumper for
Dehumidification Operation

To control a MISC output for dehumidification,

install the Humidity
Module and place the Humidity Jumper on HUM (see page 9.2).
Then place the MISC1, MISC2, or MISC3 jumper on the terminal
labeled DEHUM (see diagram below). This will supply 24VAC to the
selected MISC terminal based on the dehumidification programming
in the following pages. Only one of the three outputs (MISC1, MISC2,
or MISC3) is required to have a jumper. For more information

regarding the MISC1, MISC2, and MISC3 outputs, please see
section 18.

In the diagram below, the MISC2 jumper has

10

been set for DEHUM (dehumidification) operation.

(FAN)

DEHUM

MISC2

W3

HUM

W1

MISC3 MISC2 MISC1

Y1

G

R

C

(MISC1
ONLY)

ELEC

GAS

HP

GAS

Y2

HUM

NO HUM

2

8

4

6

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

1

3

579

B

O

W2

MISC1

RS2

MISC3

RS+5

Z

X
1

Rs1

RSGND

Y

W3

HUM

DEHUM

MISC3 MISC2 MISC1

(MISC1

ONLY)

Y2

MISC3

MISC3

OK

IMPORTANT CAUTION

NEVER PUT MORE THAN ONE JUMPER

ON THE SAME MISC JUMPER BLOCK!

THIS MAY DAMAGE YOUR THERMOSTAT

AND VOID YOUR WARRANTY

Page 10.2

Adjusting the Dehumidification Setpoint

Dehum Terminal: If a MISC terminal selected for DEHUM operation
(see page 10.2) then the thermostat will provide power to this terminal
the when the humidity in the home is above the setpoint you have
chosen. See page 10.6 for detailed programming instructions. To utilize
this feature your HVAC unit must be equipped with a DEHUM terminal.

Cool to Dehumidify: If the thermostat is programmed for Cool to
Dehumidify operation, then the thermostat will energize the cooling
system any time the humidity in the home is above the setpoint you
have chosen. See page 10.4 for detailed programming instructions.

In each case, when the indoor humidity falls below the setpoint you
have selected, Cool to Dehumidify and the MISC terminal will be
de-energized. The value for this setpoint ranges from 25% to 99%.

NOTE: Due to variations in environmental conditions, it is not always
possible to achieve the desired humidification or dehumidification setpoint.

HUMIDITY

MODE

ON /

OFF /

+

Adjust the desired
dehumidification setpoint

-

Press the HUMIDITY button
to enter the Humidification
Setup screens.

Press the MODE button once

Current Room Humidity

(25%-99%)

Press the HUMIDITY button to leave the Humidity
Control screens (if no buttons are pressed, the display
will leave the Humidity Control screens after 30 seconds).

40

NOTE: Each step # is located at
the top right corner of the
display for easy reference.

Setup

DeHumidify

99

2

Press

HUMIDITY

10

Dehumidification Notes: Press the button to set the
dehumidification setpoint to 99% for no dehumidification operation.
This will lockout Advanced Setup steps 10 and 11 (see page 10.4).

You cannot set the dehumidify setpoint any lower than the humidify setpoint; a
5% differential is forced between the humidify and dehumidify setpoints.

Page 10.3

U

Using Your Air Conditioner to Dehumidify

If Cool to Dehumidify is on and the Humidity Module is installed,
the thermostat has the ability to initiate a cooling cycle for advanced
dehumidification operation. When the thermostat detects the humidity
percentage is above the setpoint for dehumidification, and heating or
cooling is not on, the thermostat will force the compressor to run with
the fan, thus reducing moisture in the air. The green LED will blink
once every eight seconds to indicate this is taking place. This feature
will also allow you to adjust the cooling overshoot of the setpoint, from
0 to 5 (adjustable in step #11).

°°

set for 3 F and the cooling setpoint is set for 74 F, then as long as the room
temperature reads between 71 F and 74 F this feature will energize the
compressor and fan to dehumidify the air.

°°

°°

For Example: If the cooling overshoot is

MODE

10

PROGRAM

MODE

Steps 10 and 11 only appear if the Dehumidification
setpoint is not 99% (see page 10.3).

On

Select Cool to
Dehumidify feature.

Off

Step 11 appears only if step 10 is set to “ON”

Adjust the maximum
overshoot of the set
temperature in Cool to
Dehumidify mode.

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

OFF

(0 - 5 )

DeHumidify

DeHumidify

3

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

Setup

I0

Setup

I i

C

OOL

PROGRAM

MODE

Press

MODE

Press

Dehumidification Notes: The thermostat must be in the Cool, Auto, or
Program On mode for the Cool to Dehumidify feature to be available.

Page 10.4

U

Using the Dehum Terminal

If you configure a MISC output jumper for DEHUM, it may be
programmed to operate in one of two ways:

1) Normally Closed (NC): The thermostat will de-energize the
DEHUM terminal to allow the fan to run in low speed when there
is a call for 1st stage cooling and the room humidity is greater than
the dehumidification setpoint.

2) Normally Open (NO): The thermostat will energize the DEHUM
terminal to allow the fan to run in low speed when there is a call
for 1st stage cooling only and the room humidity is greater than
the dehumidification setpoint.

MODE

PROGRAM

MODE

NC

NO

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Normally Closed (NC) =
DEHUM deenergized for
low speed fan.

Normally Open (NO) =
DEHUM energized for
low speed fan.

DeHumidify

Setup

I2

10

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

Press

PROGRAM

MODE

Dehumidification Notes: The DEHUM terminal will “release” and allow

the fan to operate normally if there is call for 2nd stage cooling or if the call
for Cooling and/or Cool to Dehumidify has been satisfied.

Page 10.5

SECTION 11

Viewing Equipment Run-Times

Section 11 Contents:

Viewing the Humidifier

Run-Time................................ 11.2

Viewing the UV Light

11

Run-Time.................................11.3

Page 11.1

Viewing the Humidification Run-Time

After your humidification system has been operating for the number of
days set in step #13 below, the Service Humidify icon will appear. This
counter keeps track of the number of days since the Service Humidify
icon was reset.

MODE

PROGRAM

MODE

Press

Press the PROGRAM button to leave the Setup screens. If no buttons are

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Counts the number of
days the humidifier has
been running. Press
FAN to reset the
Service Humidify

FAN

counter and remove the
icon from the display.

pressed, the display will leave the setup screens after 30 seconds.

Service

0

Humidify

Setup

I3

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

MODE

11

Press

PROGRAM

Page 11.2

V

Viewing the UV Light Run-Time

After the UV light has been operating for the number of days set in
step #14 below, the Service UV Light icon will appear. This counter
keeps track of the number of days since the UV light icon was last
reset.

PROGRAM

11

Press

FAN

MODE

MODE

Counts the number of days

since the UV Light was last
reset. Press FAN to reset
the Service UV Light counter
and remove the icon from the
display.

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

0

Service

UV Light

Setup

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

I4

PROGRAM

MODE

Press

Page 11.3

SECTION 12

Electric Heat and Heat Pump Operation

Section 12 Contents:

Viewing the Heat Pump and
Reversing Valve Jumper

Setting.....................................12.2

Viewing the Electric Heat

12

Jumper Setting.......................12.3

Using Emergency Heat............12.4

Page 12.1

V

Viewing the Heat Pump and

Reversing Valve Jumper Settings

Steps 15 and 16 are ‘Read Only’ and may only be set with the
jumpers on the circuit board of the thermostat.

PROGRAM

12

MODE

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

ON = Heat Pump

operation
OFF = Gas Electric
operation

Indicates that the
thermostat jumper
is set for an O
reversing valve
(energize in cooling)
or a b reversing valve
(energize in heating).

OFF

Setup

O

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards th rough th e
setup screens.

I5

Press

MODE

I6

Press

PROGRAM

MODE

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 12.2

V

Viewing the Electric Heat Jumper Setting

Placing the jumper on ELEC will cause the thermostat to turn on the
fan immediately any time there is a heat demand. Since most gas
furnaces control the fan, this feature should be off unless it is
necessary for the thermostat to energize the fan with first stage heat.

Step 17 is ‘Read Only’ and may only be set with the jumpers on the
circuit board of the thermostat (see page 5.3 of the Installation
Instructions).

MODE

PROGRAM

MODE

ON indicates that the
thermostat jumper is
set for Electric Heat
operation, or OFF for
Gas/Electric or Heat
Pump operation.

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

I7

OFF

EH

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

MODE

12

Press

PROGRAM

Page 12.3

Using Emergency Heat

ENTER EMERGENCY HEAT: Only available if you have a Heat Pump
installed. To initiate the Emergency Heat feature, press the FAN
button. While holding the FAN button press the UP button. The
Cool setpoint display will read ‘EH’ (emergency heat).

12

I2:00

Su

Press for

Emergency Heat

FAN

OPERATION: During Emergency Heat operation the
thermostat will turn on the fan and the 2nd stage of heat
when there is a demand for heat. Also during Emergency
Heat the 1st stage of heating or cooling will be unavailable.

EXIT EMERGENCY HEAT: Follow the same steps as entering
Emergency Heat by pressing the FAN and UP buttons. During
Emergency Heat, only OFF and HEAT modes are available by

Pm

73

H

EAT

74

pressing the MODE button.

Page 12.4

SECTION 13

Timers and Deadbands

Section 13 Contents:

Adjusting the Heat/Cool

Differential..............................13.2

Adjusting the Cycles

Per Hour..................................13.3

Adjusting the Deadband..........13.4

Adjusting the Minutes of

13

Run-Time Before the

Next Stage...............................13.6

Selecting 2nd Stage Turn

Off Temperature.....................13.7

Page 13.1

A

Adjusting the Heat/Cool Differential

The Heat and Cool setpoints will not be allowed to come any closer to
each other than the value in this step. This minimum difference is
enforced during Auto-Changeover operation.

MODE

PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

MODE

Adjust the minimum
difference between
cooling & heating
setpoints.

(0 - 6 )

I8

C

OOL

H

EAT

Press

2

13

Press the PROGRAM button to leave the Setup screens. If no buttons

are pressed, the display will leave the setup screens after 30 seconds.

Note: To increase the spread between the heating and cooling
setpoints, press the MODE button until only the heat setpoint is
displayed. Adjust the desired setpoint. Press the MODE button
until only the cool setpoint is displayed. Adjust the desired setpoint.

PROGRAM

Press the MODE button again to enter the Auto-Changeover mode
where both the heat and cool setpoints are displayed.

Page 13.2

A

Adjusting the Cycles Per Hour

The Cycles Per Hour setting may limit the number of times per hour
your HVAC unit may energize. For example, at a setting of 6 cycles
per hour the HVAC unit will only be allowed to energize once every 10
minutes. The Cycles Per Hour limit may be overridden and reset by
pressing the UP or DOWN buttons on the thermostat.

MODE

PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

Select the cycles per
hour limit.
d=cycles per hour
limit defeated.
d1=d + defeat 5 min.
compressor lockout.

(d1, d, 2 - 6)

6

I9

Cy

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

Press

PROGRAM

MODE

13

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 13.3

A

Adjusting the Deadband

MULTI-STAGE OPERATION - Controls up to three Heat and two Cool
stages.

The 2nd Stage of heat or cool is

turned on when:
(A) The 1st Stage has been on for the time required (step #23,
page 13.6). It is adjustable from 0-60 minutes and the default
is two minutes.

And

(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the 1st stage deadband (step #20, next

page), plus the 2nd stage deadband (step #21, next page).
This 2nd stage deadband is adjustable from 0-10 degrees and

the default is two degrees.

The 3rd Stage of Heat is turned on when:

(A) The 2nd stage has been on for the time required (step #24,

page 13.6). It is adjustable from 0-60 minutes and the default

is two minutes.

And

13

(B) The temperature from the setpoint is equal to or greater
than: the setpoint plus the 1st stage deadband (step #20, next

page), plus the 2nd stage deadband (step #21, next page)
plus the 3rd stage deadband (step #22, next page). This 3rd

stage deadband is adjustable from 0-10 degrees and the
default is two degrees.

Heating

Deadband Deadband DeadbandDeadbandDeadband

3rd Stage

turn on

The above figure assumes the minimum on time for the prior stage has
been met to allow the next stage to turn on, once the deadbands have
been exceeded.

2nd Stage

turn on

DECREASE INCREASE

1st Stage

turn on

db 1 db 1db 2 db 2db 3

(adj. 1-6 )(adj. 0-10 )(adj. 0-10 ) (adj. 0-10 )(adj. 1-6 )

Heat

Setpoint

TEMPERATURE

Cool

Setpoint

Page 13.4

Cooling

1st Stage

turn on

2nd Stage

turn on

A

Adjusting the Deadband

For more detailed information, please see the explanation on the
previous page.

MODE

PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

Adjust the deadband
for the 1st stage.

(1 - 6 )

20

2

Setup

Adjust the deadband
for the 2nd stage.

2 i

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

Press

MODE

MODE

13

(0 - 10 )

Adjust the deadband
for the 3rd stage.

(0 - 10 )

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 13.5

2

Setup

2

Press

MODE

22

Press

PROGRAM

A

Adjusting the Minutes of Run-Time

Before the Next Stage

For more detailed information, please see the explanation on page 13.4.

PROGRAM

13

MODE

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

0:02

Adjust the amount of
time stage 1 must be
on before stage 2 turns
on.

(0 - 60 min.)

2

0:02

Adjust the amount of
time stage 2 must be
on before stage 3 turns
on.

(0 - 60 min.)

3

Setup

Setup

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

23

Press

MODE

24

Press

PROGRAM

MODE

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 13.6

S

Selecting 2nd Stage Turn

Off Temperature

If ON is selected, the second stage of cooling or heating will remain
energized until the thermostat reaches the setpoint on the thermostat
display.

If OFF is selected, the second stage of cooling or heating will turn off
after reaching the 1st stage deadband (

information).

MODE

PROGRAM

MODE

On

Off

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Select On or Off:
On - 2nd stage will
remain on until
setpoint is reached.
Off - 2nd stage will
turn off after reaching
1st stage deadband.

OFF

see page 13.4 for more

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

Setup

25

2

PROGRAM

MODE

13

Press

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 13.7

SECTION 14

Programming Remote Sensor Operation

Section 14 Contents:

Installing the Remote

Sensors...................................14.2

14

Controlling or Reading the
Remote Temperature (RS1)...14.3

Page 14.1

Installing the Remote Sensors

The Remote Sensor measures indoor air temperature and sends this
information to the thermostat; it measures temperature with a range of
32 to 99 F.

The Remote Sensor should be connected to the thermostat using solid
conductor CAT 5, CAT 5e, or CAT 6 type network communication cable.
This is an unshielded cable with four twisted pairs of 24 gauge solid wire;
DO NOT use stranded cable. The cable length should not exceed 250
feet. If less than 75 feet of cable is required to connect the thermostat to

the Remote Sensor, a three conductor thermostat cable (18-24 gauge)
may be used; this cable is NOT suitable for any length greater than 75
feet.

IMPORTANT: Do no use shielded wire. Do not run sensor wiring in the
same conduit as the 24VAC thermostat wiring. Electrical interference
may cause the sensor to give incorrect temperature readings.

14

Page 14.2

Controlling or Reading the
Remote Temperature (RS

1)

The thermostat may be programmed to only READ the remote sensor,
or to CONTROL to the remote sensor. Refer to advanced setup step
#26, below.

Read Only Sensor (RS1): If step #26 is set to only READ to the
remote sensor, the thermostat will not use this sensor for
temperature control. This sensor may be viewed by pressing the
OUTDOOR button on the thermostat and then pressing the MODE
button.

Control Sensor (RS1): If step #26 is set to CONTROL to the remote
sensor, the thermostat will ignore the reading of its internal
temperature sensor and only display the temperature reading from
the remote sensor. The degree icon on the thermostat will blink
once per second to indicate that a remote sensor reading is being
displayed.

MODE

14

PROGRAM

MODE

YES

Optional Remote Sensor:
YES = Read Only Remote
Sensor RS1.
NO = Control to Remote
Sensor RS1.

NO

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

26

Outside

Page 14.3

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

Press

PROGRAM

MODE

How to Use the Energy Save Feature

SECTION 15

Energy Save Operation

If the thermostat is configured to be programmable (Section 4), and
Energy Save has been selected in step #27 (below), the room will
attempt to reach the selected comfort temperature at the exact time
programmed into the thermostat. Energy Save, or more commonly
known as Smart Recovery, only works when the thermostat enters the
Morning mode from the Night mode. For example, if the Night
program is set for 11pm at 65°F heating and 85°F cooling, and the
Morning program is set for 6am at 72°F heating and 75°F cooling, the
thermostat will turn the system on before 6am in an effort to bring the
temperature to its correct setting at exactly 6am.
The T1800 learns from experience, so please allow 4-8 days
after a program change or after initial installation to give Energy Save
time to adjust to local weather, the construction of your home, and
your heating and cooling system.

MODE

PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

On

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards th rough th e
setup screens.

Setup

MODE

15

27

Select Energy Save
on or off.

Off

OFF

Press

PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 15.1

SECTION 16

Programming Run-Time Alerts

Section 16 Contents:

Setting and Resetting the
Service Filter (Fan Run-Time)

16

Alert........................................16.2

Setting and Resetting the UV

Light Run-Time Alert.............16.3

Setting and Resetting the

Humidify Run-Time Alert......16.4

Page 16.1

H

How to Set and Reset the Service Filter

(Fan Run-Time) Alert

This counter keeps track of the number of hours of fan run-time
whether the fan is energized in the Heating or Cooling modes, or in
stand alone fan operation. The Service Filter icon will appear after the
preset number of hours of fan run-time in step #29 (below) has been
achieved. Setting this counter to zero in step #29 will prevent the
Service Filter icon from ever appearing.

MODE

PROGRAM

MODE

Press

FAN

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Hours the fan has
run since last reset

Reset the counter to 0 to
remove the Service Filter
icon from the display.

Adjust the number of
hours, in increments of
50, the fan will run
before the Service
Filter icon appears on
the display. 0 = off.

(0 - 1950 hours)

0

Service Filter

0

Service Filter

Setup

Setup

28

29

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards th rough th e
setup screens.

Press

MODE

Press

PROGRAM

MODE

16

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

Page 16.2

H

How to Set and Reset the UV Light

Run-Time Alert

This counter keeps track of the number of days since the UV Light
counter has been reset. The UV Light icon will appear after the
number of days has been achieved, as shown in step #30 (below).
Setting the counter to zero in Step #30 will prevent the Service UV
Light icon from ever appearing.

16

MODE

PROGRAM

MODE

Press

FAN

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Days since the UV Light
icon has been reset

Reset the counter to 0 to
remove the Service UV
Light icon from the display.

Press the MODE button repeatedly
until this setup screen appears.

Service

UV Light

0

Setup

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

MODE

I5

Adjust the number of days
in increments of 10 before
the UV Light icon appears
on the display. 0 = off.

(0 - 1990 days)

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

0

Service

UV Light

Page 16.3

Setup

30

Press

PROGRAM

H

How to Set and Reset the Humidifier

Run-Time Alert

This counter keeps track of the number of days since the Service
Humidify icon was last reset; this icon will appear after the number of
days set in step #31 (below) has elapsed. Setting this counter to zero
in step #31 will prevent the Service Humidify icon from ever appearing.

MODE

PROGRAM

MODE

Days since the last reset
of the Service Humidify
counter.

Press

FAN

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Press the MODE button repeatedly
until this setup screen appears.

0

Reset the counter to 0 to
remove the Service Humidify
icon from the display.

Press the MODE button repeatedly
until this setup screen appears.

Service

0

Adjust the number of days
in increments of 10 before
the Service Humidify icon
appears.
0 = Off

(0 - 1990 days)

Service

Humidify

Humidify

Setup

Setup

I2

3 i

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the
button to move back­wards through the
setup screens.

MODE

16

Press

PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are

pressed, the display will leave the setup screens after 30 seconds.

The humidifier run-time alert does not take the place of
any humidifier manufacturer’s recommended maintenance
plan; it only serves as a helpful reminder.

Page 16.4

SECTION 17

Programming Vacation Mode

PROGRAM SET CLOCK

VACATION

PROGRAM SET CLOCK

VACATION

When the thermostat is programmed for Vacation mode, it will take
effect at 12:00 am of the next day.
The thermostat will control to the cooling and heating setpoints set in
Vacation programming steps 2 and 3.
Vacation setpoints will be enforced for the number of days specified in
step #1 (0 - 99 days).

Press the SET CLOCK button. While
holding the SET CLOCK button, press
the PROGRAM button to enter the
Vacation programming setup steps.

Select the number of days
that the Vacation schedule
will be in effect. A value
of 0 disables Vacation
mode.

(0 - 99 days)

Adjust the cooling setpoint
for Vacation mode.

(35 - 99 )

Setup

0

Setup

80

Setup

I

Vacation

y
2

C

OOL

Vacation

Press

MODE

Press

MODE

Adjust the heating

17

You cannot set the Heat setpoint any higher than the Cool setpoint minus
the deadband setting in Advanced Setup step #18 on page 13.2.

setpoint for Vacation
mode.

(35 - 99 )

Press the PROGRAM and SET CLOCK buttons to
exit the setup screens. If no buttons are pressed, the
display will leave the setup screens after 30 seconds.

65

Page 17.1

3

Vacation

H

EAT

Programming Vacation Mode (continued)

VACATION DISPLAY - When the thermostat is placed into the
Vacation mode, the thermostat will display the screen shown below.

2

To return the thermostat to normal operation from Vacation mode,
press the PROGRAM and SET CLOCK buttons and adjust the days
in step #1 to zero (see previous page).

Press the PROGRAM and SET CLOCK buttons to return to normal
operation.

y

17

Page 17.2

SECTION 18

Configuring the MISC Outputs

Section 18 Contents:

Configuring the Jumpers........18.2

Explanation of Jumper

Settings..................................18.3

18

Page 18.1

C

Configuring the Jumpers

For additional flexibility, your thermostat has three configurable
outputs. These outputs are designed to have different functions
depending on how the jumpers are set (below).
Each output, labeled MISC1, MISC2, and MISC3 may be set for one
of the five choices available.
In the diagram below, the MISC3 jumper has been set for HUM*
(humidification) operation, the MISC2 jumper has been set for
DEHUM* (dehumidification) operation, and the MISC1 jumper has
been set for W3 (3rd stage of heat) operation.

(FAN)

HUM

DEHUM

MISC2

W3

W1

Y1

MISC3 MISC2 MISC1

G

R

C

(MISC1

ELEC

GAS

HP

GAS

Y2

ONLY)

HUM

NO HUM

2

8

4

6

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

1

3

579

B

O

W2

MISC1

RS2

MISC3

RS+5

Z

X

1

Rs1

RSGND

Y

W3

HUM

DEHUM

MISC3 MISC2 MISC1

Y2

(MISC1

ONLY)

CAUTION

NEVER PUT MORE THAN

ONE JUMPER ON THE SAME

MISC JUMPER BLOCK!

DOING SO MAY DAMAGE

YOUR THERMOSTAT AND

VOID THE WARRANTY.

*The Humidity Module (sold separately) must
be installed to operate a humidification
and/or dehumidification system.

MISC3

OK

Page 18.2

18

MISC3

Explanation of Jumper Settings

W3 JUMPER SETTING

If the jumper for MISC1, MISC2, or MISC3 is set to W3, the corresponding MISC screw terminal
on the backplate will control a third stage of heat.

W3 MULTI-STAGE OPERATION EXPLAINED - PAGE 13.4

The 3rd Stage of Heat is turned on when:

(A) The 1st and 2nd stages have been on for the time required (steps #23
and #24 page 13.6). It is adjustable from 0-60 minutes and the default

And

is two minutes.
(B) The temperature from the setpoint is equal to or greater than: the set-

point plus the 1st stage deadband (step #20, 13.5), plus the 2nd stage
deadband (step #21, 13.5) plus the 3rd stage deadband (step #22,

13.5). This 3rd stage deadband is adjustable from 0-10 degrees and

the default is two degrees.

3rd Stage

turn on

2nd Stage

turn on

Heating

Deadband Deadband DeadbandDeadbandDeadband

db 1 db 1db 2 db 2db 3

(adj. 1-6 )(adj. 0-10 )(adj. 0-10 ) (adj. 0-10 )(adj. 1-6 )

1st Stage

turn on

DECREASE INCREASE

TEMPERATURE

Heat

Setpoint

Cool

Setpoint

HUM JUMPER SETTING

If the jumper for MISC1, MISC2, or MISC3 is set to HUM,
terminal on the backplate will control a humidification system.

18

HUMIDIFICATION OPERATION - SECTION 9

If your HVAC unit is equipped with a humidification system and the
Humidity Module (sold separately) has been installed, the thermostat will
provide power to the MISC1, MISC2, or MISC3 terminal of the thermostat
when the humidity in the home falls below the humidity setpoint you have

chosen. The value for this setpoint ranges from 0% to 60%. If no
humidity is desired or if a humidification system has not been installed, set
the value to 0%.

Page 18.3

the corresponding MISC screw

Cooling

1st Stage

turn on

2nd Stage

turn on