Venstar T2900SCH User manual

Venstar Inc. 08/07

Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage

Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.

Digital

Thermostat

PROGRAMMABLE

up to 3-heat

& 2-cool

Digital

Thermostat

PROGRAMMABLE

up to 3-heat

& 2-cool

SCHOOL THERMOSTAT

T2900SCH

commercial

Energy Saving Operation

Programmable Override

Unoccupied until button press

Perfect for Classroom Operation

Setpoint Limiting Security

Separate Weekend/Weekday

Programs

99 Days of Configuration

Holiday Mode

Morning Warm-up Period

Soft Start Capability

Back-Lit Display

One for All Works with

Virtually All Equipment

Non-Volatile Memory

Keypad Lockout

3 Security Levels

Remote Sensor Ready

48 Hour Clock Backup

Compressor Protection

Economizer Operation

OWNER’S

MANUAL

OWNER’S

MANUAL

Designed Specifically for the School Environment

HEAT

COOL HEAT

PUMP

Page i

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.

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 AND VOID

YOUR WARRANTY.

CAUTION

FOR HOME OR OFFICE USE

Tested to Comply

with FCC Standards

Thermostat T2900SCH

4Z95

CAUTION

MISC3 MISC3

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

The first page of each section contains a more detailed list of the contents

within 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, 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.

Quick Start

Getting to Know Your

Thermostat

Setting Clock and Day

Basic Operation

Viewing 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

Timers and Deadbands

Using the

Programmable Output

Programming Remote

Sensor Operation

Dry Contact Operation

Override Timer

Operation

Programming the Run-

Time Alerts

Programming the

Holiday Mode

Configuring the MISC

Outputs

Factory Defaults,

Calibration, and Sensors

Accessories

Advanced Setup Table

Light Activated

Operation

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

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.

Setup

I2:00

Setup

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

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

COOL

I2:00

HEAT

COOL

AUTO

I2:00

HEAT

COOL

I2:00

Program On

OFF

I2:00

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

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

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

Page 1.4

Selecting Your Desired Temperature

(adjusting the setpoints)

Press

FAN

HEAT

COOL

I2:00

AUTO

FanOn

Using the Fan Button

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.

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