Digital
Digital
Thermostat
Thermostat
residential
THERMOSTAT
900
T1
7-DAY
7-DAY
PROGRAMMABLE
PROGRAMMABLE
up to
up to
& 2-cool
3-heat
3-heat
& 2-cool
HEAT
COOL
with HUMIDITY
CONTROL
Dry Contact Equipped
Outdoor Sensor Ready with
Control up to 3 Heat &
2 Cool Stages
3 Configurable Outputs
Adjustable 2nd & 3rd Stage
Timers & Deadbands
Backlit Display & Button
Legends
Aux Heat Indicator
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
Venstar Inc. 08/07
High/Low Readouts for the Day
Equipped with Optional Humidity
Module: Controls Humidification,
Dehumidification and Reheat
Programmable Output
Accepts EZ Programmer
Accepts Optional IR Remote Control
Accepts Comfort Call
Phone Control Accessory
MANUAL
HEAT
PUMP
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
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 T1900
Tested to Comply
c
with FCC Standards
C
F
4Z95
FOR HOME OR OFFICE USE
MISC3
Page i
How to Use This Manual
The Table of Contents divides the thermostat features into sections
The first page of each section contains a more detailed Contents of each
SECTION 14
Timers and Deadbands
making it easier to quickly find information.
section, such as the example page shown below.
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
control 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.
Reheat: Running the cooling and 2nd stage strip heaters at the
same time in order to dehumidify the air without cooling down
the room temperature.
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
Page iv
Getting to Know Your
Thermostat
Quick Start
Setting Clock and Day
Basic Operation
Viewing Outdoor and Remote
Temperature and Humidity
Programming the
Daily Schedule
Programming the
Fan Operation
Thermostat Display
Options
Humidification
Dehumidification
Viewing Equipment
Run-Times
Electric Heat and
Heat Pump Operation
Dual Fuel Operation
Timers and Deadbands
Using the
Programmable Output
Programming Remote
Sensor Operation
Dry Contact 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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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
1
Backlit LCD Display
I2:00
Mo
AUTO
Heat or Cool Demand Indicator
Red = Heat, Green = Cool
QUICK RELEASE FOR
ACCESSORY PORT
(pg. 23.1)
OUTDOOR
FAN
Pm
PLATINUM
COMMERCIAL PROGRAMMABLE THERMOSTAT
I2:00
Su
AUTO
74
COOL
HEAT
72
Mode
Button
eries
Pm
FAN
HUMIDITY
OUTDOOR
HUMIDITY
Page 1.2
Warmer Button sometimes referred
(glows red) to as the UP button
74
COOL
HEAT
72
PROGRAM SET CLOCK
VACATION
PROGRAM
[ ]
Cooler Button sometimes refer-
(glows blue) red to as the
DOWN button
MODE
[ ]
SET CLOCK
VACATION
111
Display Features
Program On
Am
I8:88
SuMoTuWeThFrSa
Service Filter
Pan 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 schedules.
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.
Pm
StartStop
DeHumidify
I88
Section 4
Page 1.3
Setup
HI
88
COOL
Outside
Vacation
AUXHEAT
LO
88
Display Features
1
Program On
Am
I8:88
SuMoTuWeThFrSa
Service Filter
Pan 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.
Fan On icon - Section 7
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 - Section 19
Appears when the filter should be serviced under normal conditions.
Adjustable from 0 - 1950 hours of blower operation.
icon - Section 8
Indicates the keypad has been locked.
StartStop icon - Section 6
Appears when programming timer functions.
UV Light icon - Section 19
Appears when the UV bulb should be serviced under normal
conditions. Adjustable from 0 - 1990 days of operation.
Pm
StartStop
DeHumidify
I88
Sections 6-19
Page 1.4
Setup
HI
88
COOL
Outside
Vacation
AUXHEAT
LO
88
1
Display Features
I8:88
SuMoTuWeThFrSa
Service Filter
Pan UV Light
AUTO
OFFON
Morning
DayNight
Evening
FanOn
Program On
Am
Pm
StartStop
DeHumidify
Setup
AUXHEAT
I88
HI
88
COOL
Outside
Vacation
LO
88
Vacation icon Indicates the thermostat has Vacation setpoints in use.
AuxHeat icon - Page 14.4
Indicates 2nd stage electric strip heat is being used when the
thermostat is programmed for Heat Pump operation. Only the
Aux icon will appear during Cool to Dehumidify to indicate Reheat
operation.
Humidify/DeHumidify icon - Sections 9-10
Indicates the system is currently humidifying/dehumidifying the air.
Lo icon - Section 5
Indicates the lowest recorded outdoor temperature for the day.
Hi icon - Section 5
Indicates the highest recorded outdoor temperature for the day.
Service Pan icon - Section 17
Indicates that a sensor (optional accessory) has detected the
condensate drain pan is full and the compressor (Y1) has been
locked out.
Section 20
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
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.
2
Page 2.1
GRAM SET CLOCK
2
VACATION
MO
Press the SET
CLOCK button
Setting the Clock
Am
I2:00
Setup
I
During Setup &
Programming:
Pressing the UP or DOWN
buttons will modify the flashing
selection.
To adjust the
Clock or Day use
Setting the Day
Mo
Press the SET
CLOCK button
to return to
normal operation.
Setup
2
GRAM SET CLOCK
VACATION
MO
Page 2.2
Press
MODE
To adjust the time by
hours press and hold
the FAN button while
pressing the UP or
DOWN buttons.
Buttons.
Selecting the Heat or Cool Mode
Select Mode by Pressing the MODE Button
Pm
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
70
Pm
70
Pm
70
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 indicates both heating
Off
and air conditioning
systems are turned off.
I2:00
Su
Day
I2:00
Su
OFF
Program On
Pm
70
Pm
70
Page 2.3
HEAT
68
76
COOL
76
COOL
HEAT
68
76
COOL
HEAT
68
2
Press
MODE
Press
MODE
Press
MODE
Press
MODE
Selecting Your Desired Temperature (adjusting the setpoints)
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.
Pm
I2:00
Su
AUTO
70
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
I2:00
Su
76
COOL
HEAT
68
76
COOL
Adjust the desired
set temperature with the
buttons.
Adjust the desired
set temperature with the
70
buttons.
Using the Fan Button
Pm
I2:00
Su
AUTO
FanOn
70
76
68
COOL
HEAT
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
GRAM SET CLOCK
3
VACATION
MO
Press the SET
CLOCK button
Setting the Clock
Am
I2:00
During Setup & Programming:
Pressing the UP or DOWN
buttons will modify the flashing
selection.
Setup
I
To adjust the
Clock or Day use
Setting the Day
Mo
Press the SET
CLOCK button
to return to
normal operation.
Setup
2
GRAM SET CLOCK
VACATION
MO
Page 3.2
Press
MODE
To adjust the time by
hours press and hold
the FAN button while
pressing the UP or
DOWN buttons.
buttons.
SECTION 4
Basic Operation
Section 4 Contents:
Programmable or Non-
Programmable Thermostat........4.2
Manual or Auto-Changeover
Thermostat..................................4.3
Selecting the Operating Mode....4.4
Selecting Your Desired
Temperature................................4.8
4
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
may be configured to be non-programmable, with or without
Auto Changeover. Follow the step below.
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.
Note: Press the MODE
butto n momen taril y
MODE
PROGRAM
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.
YES
Select Yes if you would like
the thermostat to be programmable or No for non-programmable.
NO
pressed, the display will leave the setup screens after 30 seconds.
Program On
to move through the
setup screens. Press
and hold the MODE
button to move backward s thro ugh the
setup screens.
Setup
i
Press
PROGRAM
Page 4.2
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
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.
4
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.
YES
Select Yes if you would
like the thermostat to
be Auto-Changeover or
No for a Heat Only and
Cool Only Thermostat.
NO
pressed, the display will leave the setup screens after 30 seconds.
AUTO
Setup
Page 4.3
Note: Press the MODE
butto n momen taril y
to move through the
setup screens. Press
and hold the MODE
button to move backward s thro ugh the
setup screens.
2
Press
PROGRAM
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
Pm
Heating Only
The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.
The COOL setting indicates the
reach before the air conditioner
Cooling Only
temperature the room has to
will turn on to cool the room.
OFF indicates both heating
systems are turned off.
Off
and air conditioning
I2:00
Su
I2:00
Su
I2:00
Su
OFF
70
Pm
70
Pm
68
76
70
HEAT
Press
MODE
COOL
Press
MODE
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
Pm
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.
OFF indicates both heating
Off
and air conditioning
systems are turned off.
I2:00
Su
I2:00
Su
I2:00
Su
AUTO
I2:00
Su
OFF
70
Pm
70
Pm
70
Pm
HEAT
68
76
COOL
76
COOL
HEAT
68
70
4
Press
MODE
Press
MODE
Press
MODE
Page 4.5
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
Pm
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 indicates both heating
systems are turned off.
Off
and air conditioning
I2:00
Su
I2:00
Su
I2:00
Su
Day
I2:00
Su
Day
I2:00
Su
OFF
70
Pm
70
Program On
Pm
70
Program On
Pm
70
Pm
HEAT
68
76
COOL
HEAT
68
76
COOL
70
Page 4.6
Press
MODE
Press
MODE
Press
MODE
Press
MODE
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
Pm
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 wil
activate the time period
programming for the cooling
or heating setpoint ONLY
(Morning, Day, Evening
& Night Periods).
OFF indicates both heating
Off
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
70
Pm
70
Pm
70
Program On
Pm
70
Pm
HEAT
68
76
COOL
76
COOL
HEAT
68
76
COOL
HEAT
68
70
Page 4.7
4
Press
MODE
Press
MODE
Press
MODE
Press
MODE
Selecting Your Desired Temperature (adjusting setpoints)
AUTO OR PROGRAM MODE
Pressing the UP or DOWN buttons in Auto or Program
modes will adjust both the heat and cool set temperatures
4
simultaneously. For more information on this see page 14.2.
Adjust the desired
Pm
I2:00
Su
AUTO
70
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
I2:00
Su
76
COOL
HEAT
68
76
COOL
set temperature with the
buttons.
Adjust the desired
set temperature with the
70
buttons.
Page 4.8
SECTION 5
Viewing the Temperature and Humidity Sensors
Section 5 Contents:
Viewing the Outdoor
Temperature..............................5.2
Viewing the Indoor
Humidity....................................5.3
5
Page 5.1
Viewing the Outdoor Temperature (RS2)
This requires an outdoor sensor (optional accessory) to be installed
(see page 16.2 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.
N
HUM
OUTDOOR
Press the OUTDOOR
button.
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.
83
HI
92
Outside
LO
68
78
Press the OUTDOOR
button to return to
normal operation.
Note: If no sensors are connected 2 dashes [- -] will appear.
N
OUTDOOR
Page 5.2
HUM
High temperature
for the day.
Current outdoor
temperature.
Low temperature
for the day.
Press
MODE
Viewing the Indoor Humidity
To display the current humidity measured at the thermostat,
press the HUMIDITY button of the thermostat. The display
will then show the current indoor humidity along with the
humidification setpoint
5
HUMIDITY
Current Room Humidity
NOTE: Due to variations in environmental conditions, it is not always possible
to achieve the desired humidification or dehumidification setpoint.
To view the indoor humidity
reading, press the
HUMIDITY button
40
Press the HUMIDITY button
again to return the display
to normal operation.
Humidify
0
Setup
I
Press
HUMIDITY
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.
Mo
Select the day of week
(Mo - Su)
MODE
Am
Adjust the start time
for Morning.
Adjust the cooling
setpoint for Morning.
(35 - 99 )
Adjust the heating
setpoint for Morning.
(35 - 99 )
6:00
Morning
6:00
Morning
6:00
Morning
Page 6.2
Start
Mo
MODE
Am
Mo
Am
Mo
78
COOL
78
COOL
HEAT
70
Continued
MODE
MODE
6
Press
Press
Press
Press
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