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