Venstar T2800 User manual

Venstar Inc. 08/07
Meets Commercial California Title 24
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
HEAT
COOL HEAT
PUMP
Digital
Thermostat
PROGRAMMABLE
up to 3-heat
& 2-cool
7-DAY
Digital
Thermostat
PROGRAMMABLE
up to 3-heat
& 2-cool
7-DAY
THERMOSTAT
T2800
commercial
Control up to 3 Heat &
2 Cool Stages
3 Configurable Outputs
Timers & Deadbands
Backlit Display & Button
Legends
Aux Heat Indicator
Set Point Limiting
Adjustable 2nd & 3rd Stage
Outdoor Sensor Ready with
High/Low Readouts for the Day
Accepts EZ Programmer
Accepts Optional Humidity
Module: Controls Humidification
and Dehumidification
Accepts Optional IR
Remote Control
Accepts Comfort Call
Phone Control Accessory
OWNER’S
MANUAL
OWNER’S
MANUAL

Page i
NOTE: Due to variations in environmental conditions, it is not
always possible to achieve the desired humidification or
dehumidification setpoint.
MISC3 MISC3
OK
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.
Follow the Installation Instructions before proceeding.
Set the thermostat mode to “OFF” prior to changing
settings in setup or restoring Factory Defaults.
NEVER PUT MORE THAN ONE
JUMPER ON THE SAME MISC
JUMPER BLOCK!
THIS MAY DAMAGE YOUR
THERMOSTAT.
CAUTION
CAUTION
C
c
F
FOR HOME OR OFFICE USE
Tested to Comply
with FCC Standards
Thermostat T2800

Page ii
Page 14.1
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
SECTION 14
Timers and Deadbands
14
The first page of each section contains a more detailed list of the contents
withing that section, such as the example page shown below.
The Table of Contents divides the thermostat features into sections
making it easier to quickly find information.
In addition, this manual also has an Index to help you find any information
regarding this thermostat quickly.
How to Use This Manual
Header shows section #
and title of section
Section contents
Visible section tab
on the side of the
page
Section and page #

Glossary of Terms
Page iii
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, and
3rd stage heating.
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.

2
1
3
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
4
5
Quick Start
Getting to Know Your
Thermostat
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
Timers and Deadbands
Energy Save
Operation
Programming the Run-
Time Alerts
Programming the
Holiday Mode
Configuring the MISC
Outputs
Factory Defaults,
Calibration, and Sensors
Accessories
Advanced Setup Table
Page iv
Table of Contents

Page 1.1
Section 1 Contents:
Setting the Clock and Day...........1.2
Selecting the Heat or Cool
Mode............................................1.3
Selecting Your Desired
Temperature................................1.4
Using the Fan Button...................1.4
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.
SECTION 1
Quick Start
1

Buttons.
To adjust the
Clock or Day use
Press the MODE and
HUMIDITY buttons
at the same time
Press the MODE
and HUMIDITY
buttons at the
same time to
return to normal
operation.
Su
Setup
2
Am
I2:00
Setup
I
Setting the Clock
During Setup &
Programming:
Pressing the UP or DOWN
buttons will modify the flashing
selection.
Setting the Day
Press
MODE
Page 1.2
1
To adjust the time by
hours press and hold
the FAN button while
pressing the UP or
DOWN buttons.
HUMIDITY
MODE
SET CLOCK
HUMIDITY
MODE
SET CLOCK

Selecting the Heat or Cool Mode
Press
MODE
Press
MODE
Press
MODE
Press
MODE
HEAT
I2:00
Su
70
Pm
68
COOL
I2:00
Su
70
Pm
76
HEAT
COOL
AUTO
I2:00
Su
70
Pm
68
76
HEAT
COOL
I2:00
Su
Program On
70
Pm
68
76
OFF
I2:00
Su
70
Pm
occupied
Program On will activate the
stored timer operation for the
heating and cooling
setpoints. (occupied or
unoccupied periods)
Time Schedule for
Heating or Cooling
Select Mode by Pressing the MODE Button
The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.
Heating Only
The COOL setting indicates the
temperature the room has to
reach before the air conditioner
will turn on to cool the room.
Cooling Only
OFF indicates both heating
and air conditioning
systems are turned off.
Off
AUTO will automatically select
heat or cool based on room
temperature demand.
Heating or Cooling
Page 1.3
1

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.
buttons.
Adjust the desired
set temperature with the
HEAT
COOL
AUTO
I2:00
Su
70
Pm
68
76
HEAT OR COOL MODE
Pressing the UP or DOWN buttons in Heat or Cool mode will
adjust only the heat or cool set temperature.
buttons.
Adjust the desired
set temperature with the
COOL
I2:00
Su
70
Pm
76
Page 1.4
Selecting Your Desired Temperature
(adjusting the setpoints)
Press
FAN
Fan On indicates constant fan operation.
If Fan On is selected the fan will run
continuously at all times, except in Off,
and will only run if there is a heating or
cooling demand in Unoccupied periods.
Pressing the FAN button toggles this
feature on or off.
HEAT
COOL
AUTO
Su
70
Pm
68
76
I2:00
FanOn
Using the Fan Button
1