Venstar EXPLORER Mini T2100 Original instructions

Owner’s Manual
& Installation
Instructions
7 Day Programmable •Fan Coil Control
with
Wi-Fi
and local
API
FAN COIL THERMOSTAT
RESIDENTIAL MODEL T2100

TheT2100 can be used to replace any of the following thermostats.
No re-wiring or backplate change should be required.
Venstar, Inc
T1070 Non-programmable**
T1075 programmable
Carrier, Corp
33CSSN2-FC* Non-programmable**
33CSSP2-FC* programmable
International Environmental Corp
E055-71308102*, E055-71520301, E055-71520304
E055-71308115*, E055-71520316, E055-71520318 Non-programmable**
E055-71308103*, E055-71520302, E055-71520305
E055-71308116*, E055-71520317, E055-71520319 programmable
Johnson Controls
T701DFN-1,T701DFN-2,T701DFN-3,T701DFN-4 Non-programmable**
T701DFP-1, T701DFP-2,T701DFP-3, T701DFP-4 programmable
* : setup step 20 (Fan Coil Type) should be set to ‘SPECIAL’ for 33ZCRLYBRD
** : setup step 4 (PROG) should be set to ‘NO’
Note : TheT2100 uses a different remote temperature sensor than the
models shown so if a remote sensor had been in use, it should be
replaced with a ACC-DSEN.

i
Follow the Installation Instructions before proceeding. Set the
thermostat mode to “OFF” prior to changing settings in setup
or restoring Factory Defaults.
CAUTIO
N
FCC Compliance Statement
This equipment 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 a residential
installation.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 communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that
of the receiver.
• Consult the dealer or an experienced radio or TV technician for help.
Notice: Only peripherals complying with FCC limits may be attached to this
equipment. Operation with noncompliant peripherals or peripherals not
recommended by Venstar, is likely to result in interference to radio and TV
reception. Changes or modifications to the product, not expressly approved by
Venstar could void the user’s authority to operate the equipment.
FCC - INDOOR Mobile Radio Information:
To comply with FCC/IC RF exposure limits for general population / uncontrolled
exposure, the antenna(s) used for this transmitter must be installed to provide a
separation distance of at least 20 cm from all persons and must not be co-located
or operating in conjunction with any other antenna or transmitter.
This Device complies with Industry Canada License-exempt RSS standard(s).
Operation is subject to the following two conditions: 1) this device may not
cause interference, and 2) this device must accept any interference, including
interference that may cause undesired operation of the device.

ii
This Mini thermostat has the ability to receive updates to its firmware.
Periodically firmware updates are released by the manufacturer to add features
and/or performance enhancements.This manual was produced reflecting the
most current firmware/feature set at the time of publication, firmware rev. 1.0.
Firmware releases after rev. 1.0 may not be adequately depicted in this manual.
Please refer to the appropriate website or contact your place of purchase to learn
about changes to the thermostat after firmware release 1.0.
Under Industry Canada regulations, this radio transmitter may only operate using
an antenna of a type and maximum (or lesser) gain approved for the transmitter
by Industry Canada.To reduce potential radio interference to other users, the
antenna type and its gain should be so chosen that the equivalent isotropically
radiated power (e.i.r.p.) is not more than that necessary for successful
communication.
Cet appareil est conforme avec Industrie Canada, exempts de licence standard
RSS(s). Son fonctionnement est soumis aux deux conditions suivantes: 1) ce
dispositif ne doit pas causer d’interférences, et 2) ce dispositif doit accepter
toute interférence, y compris les interférences qui peuvent causer un mauvais
fonctionnement de l’appareil.
En vertu des règlements d’Industrie Canada, cet émetteur de radio ne peut
fonctionner en utilisant une antenne d’un type et maximale (ou moins) Gain
approuvé pour l’émetteur par Industrie Canada. Pour réduire les interférences
radio potentielles aux autres utilisateurs, le type d’antenne et son gain doivent
être choisis afin que la puissance isotrope rayonnée équivalente (PIRE) ne est pas
plus de ce qui est nécessaire pour une communication réussie.
We, Venstar, declare under our sole responsibility that the device to which
this declaration relates: 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.
FCC ID: MUH-SKYPORT8
IC: 12547A-SKYPORT8
Innovation, Science and Economic Development Canada
ICES-003 Compliance Label: CAN ICES-3 (B)/NM8-3(B)

Table of Contents
Installation Instructions..........................................................1
Thermostat Backplate ........................................................2
Wire Connections................................................................3
Connect to Wi-Fi.......................................................................5
Front Panel.................................................................................8
Display........................................................................................9
Basic Operation......................................................................11
User Setup Steps ....................................................................13
Backlight Operation .......................................................15
Setpoint Limits.................................................................16
Fan Coil Operation ..........................................................18
Deadband Settings..........................................................19
Keypad Lock ............................................................................25
Programming a Daily Schedule...........................................26
About Advanced Features & Operation..............................28
Advanced Setup Table...........................................................31
Follow Installation Instructions carefully. Disconnect
Power to the Heater/Air Conditioner before removing
the old thermostat and installing the new thermostat.
CAUTION
IMPORTANT
© Copyright 2019, All Rights Reserved T2100
iii

Auto-Changeover: A mode in which the thermostat will turn on the
heating or cooling based on room temperature demand.
Cool Setpoint: The warmest temperature that the space should rise
to before cooling is turned on (without regard to deadband).
Deadband: The number of degrees the thermostat will wait, once a
setpoint has been reached, before energizing heating or cooling.
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 regard to deadband).
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 runningTime Period Programming.
Programmable Thermostat: A thermostat that has the capability of
runningTime 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 the day.
iv
Glossary of Terms

Installation Instructions
1
Remove and Replace the old thermostat
To install the thermostat properly, please follow these step by step
instructions. If you are unsure about any of these steps, call a qualified
technician for assistance.
• Installation tools: Small flat blade screwdriver, Phillips screwdriver,
wire cutters and wire strippers.
• Make sure your Heater/Air Conditioner is working properly before
beginning installation of the thermostat.
• Carefully unpack the thermostat. Save the screws, any brackets,
and instructions.
• Turn off the power to the Heating/Air Conditioning system at the main
fuse panel. Most residential systems have a separate breaker or
switch for disconnecting power to the furnace.
• Remove the cover of the old thermostat. If it does not come off easily,
check for screws.
• Loosen the screws holding the thermostat base or subbase to the
wall and lift away.
• If you have a smart phone handy, take a photo of the wiring for
future reference.
• 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.
• Keep the old thermostat for reference purposes, until your new
thermostat is functioning properly.

Installation Instructions
2
SCALE 1 : 1
The Explorer Mini Thermostat Backplate
RS Remote Sensor
R 24 VAC return
GLow speed fan relay
Y1 Cool
G3 High speed fan relay
W1 Heat
G2 Medium speed fan relay
C24 VAC common
H20 Water Temp. Changeover Sensor
CK1 Dry Contact
IMPORTANT: This thermostat requires both R (24 VAC Return) and C (24 VAC
Common) wires be connected to the backplate terminals to operate properly.
To remove the thermostat backplate:
Gently separate the display from the
base by pulling from the center.
RS R G Y1 G3 W1 G2 C H20 CK1

SCALE 1 : 1
3
Installation Instructions
Thermostat If 2-pipe with
auxiliary electric heat
Generic relay board
24vac24 volt
water
valve
H20 Changeover Sensor
(ACC-SENFC)
(closes below 60˚,
opens above 75˚)
Wiring Diagram
2-Pipe, Low Voltage Valve, H20 Changeover Sensor
R
G
Y1
G3
W1
G2
C
H20
R
VEH
C
G
G2
G3
COM
L
M
H
R
C

Installation Instructions
4
SCALE 1 : 1
Thermostat
Connect directly to R
terminal on backplate
IMPORTANT NOTE:
If a duct sensor is
connected to this
thermostat it is
suggested that the fan
be programmed for
continuous operation
(Setup Step 16, page 18
of the Owner’s Manual)
Generic relay board
24vac24 volt
water
valves
Dry Contact
Duct Sensor
ACCDSEN
Wiring Diagram
4-Pipe, Low Voltage Valves, Duct
Temperature Sensor & Dry Contact
RS
R
G
Y1
G3
W1
G2
C
H20
CK1
R
CH
C
G
G2(W)
G3(Y)
COM
R
C
RS
RS
GND

5
At minimum the first 3 tasks below must be completed to access your
thermostat remotely from a browser. The 4th step is optional (highly
recommended) and only is needed to access your thermostat(s) from
a mobile device.
These steps are:
1. Successful connection to a local Wi-Fi Access Point with
internet access.
2. Confirm receipt of a Skyport generated verification email
(this only occurs once during the Skyport account setup).
3. A 6-digit code obtained from the thermostat is successfully
entered into a Skyport account.
4. Successfully download and install the Venstar Skyport app
on to your mobile device(s).
Your thermostat operates on the 2.4 Ghz, Wi-Fi b/g/n band.
Wi-Fi Symbol Legend
When the only the ‘dot’ of the Wi-Fi symbol appears = not
connected to an access point.
When the full Wi-Fi symbol appears = connected to an
access point.
When the full Wi-Fi symbol appears and the ‘dot’ of the symbol is
flashing = connected to Skyport.
Connect to Wi-Fi Overview

6
Connect to Wi-Fi Overview
ICON
Wi-Fi Setup
The Venstar Configurator App is needed to configure the Wi-Fi
Settings of this thermostat
• Download the Venstar Configurator App
from your mobile device’s App Store.
• Open the Venstar Configurator App
- Select the Explorer Mini Thermostat.
- Press and hold the FAN button of the thermostat for
approximately 5 seconds to enter Wi-Fi setup screens.
- Press the cooler button on the thermostat to setup Wi-Fi.
- Follow the instructions that appear on the Venstar
Configurator App.
Connect to Skyport
Although there is more than one way to create a Skyport account, the
steps below illustrate account creation from a browser. To create a
Skyport account a thermostat must be joined to the account.
If the thermostat is connected to the local Wi-Fi Access Point, but you
do not have a Skyport account, you may create an account and join the
thermostat to the account by doing the following:
1. Open your browser to: http://venstar.skyportcloud.com
2. Select “If you don’t have any account, create an account here”
3. Follow on screen instructions to create an account and add a
thermostat to the Skyport account, after verifying the Skyport email.

7
Connect to Wi-Fi Overview
Join a Thermostat to Skyport
If the thermostat is connected to the local Wi-Fi access point but not yet
joined to an existing Skyport account, you may join the thermostat to the
account by doing the following:
1. Log in to your Skyport account.
2. Select the “Location” you want to add a thermostat into.
3. Select “Add a new thermostat”. A screen will ‘pop-up’ asking for a
six digit code.
4. Press the FAN button on the thermostat for 5 seconds.
5. Press the Warmer button on the thermostat.
6. A six digit code will appear on the thermostat’s display.
7. Enter the six digit code into your Skyport account.
Wi-Fi Status Screens
Press and hold the FAN button on the thermostat for 5 seconds. When
“Wi-Fi Setup” appears on the display, press the MODE button. Pressing
the up or down button will sequence through the following information:
• AP Name
• AP Signal Strength
• IP Address
• Mac address
• Skyport Status
• API Status
Press and hold the FAN button on the thermostat for 5 seconds to return
to normal operation.
NOTE: You may only enter Wi-Fi screens if the thermostat is NOT running
the programmed schedule.

8
Front Panel
1Backlit Display
2Up/Warmer, Down/Cooler Buttons
3MODE Button
4FAN Button
5Heat or Cool Indicator
Heat = Red, Cool = Green
1
3
2
4 5

9
Display
1Mode Indicators
Selects the operational mode of the equipment.
HEAT - Indicates the heating mode.
COOL - Indicates the cooling mode.
AUTO - Indicates the system will automatically changeover
between heat and cool modes as the temperature
varies.
OFF - Indicates heating and cooling are turned off.
2 Clock with Day of the Week
Indicates the current time and day. This clock is also used to
program the time period schedules.
3Room Temperature Display
Indicates current room temperature.
4Desired Set Temperature
Indicates desired room temperature(s).
2
3
4
1
1
1
4

10
Display
5Morning, Day, Evening & Night icons
Indicates the day part of the time period program.
6Setup icon
Indicates the thermostat is in the setup mode.
7Fan icon
When only the FAN icon is displayed, the fan is always
on. If the FAN is not on the display, then the FAN is in
Auto mode and will run only when necessary to heat
or cool. = low speed, = med. speed, = high speed.
8 Locked icon
Indicates the thermostat’s control buttons have
been locked.
6
5
8
7

11
Basic Operation
Selecting Your Desired Temperature (adjusting the setpoints)
Heat or Cool Mode
Auto-Changeover Mode
Pressing the WARMER or COOLER buttons in
Auto mode will adjust both the heat and cool
setpoints simultaneously. To adjust the heat
and cool setpoints individually, choose HEAT
mode to adjust the heat setpoint, and/or COOL
mode to adjust the cool setpoint, then return
to AUTO mode.
Pressing the UP or DOWN buttons in
Heat or Cool mode will adjust only the
heat or cool set temperature.
Adjust the desired set
temperature with these buttons

12
Basic Operation
Using the FAN button for Fan Operation
Note: When the thermostat is placed in OFF with the MODE button the fan
will not operate, unless Setup Step #13 is set to ON (page 30).
Press
FAN
Press
FAN
Press
FAN
Press
FAN
low speed medium speed high speed auto
FAN

13
How to Change Settings in the Setup Screens
To enter the setup screens, press the MODE button, and
simultaneously press FAN button for 5 seconds. Release the buttons
when you see “Setup” on the display. Use the WARMER or COOLER
buttons to adjust the value of your selection. Press MODE to advance
to the next setup step. Press MODE and FAN together again for 5
seconds to leave the setup screens.
Setup Steps
FANMODE
press together for
5 seconds
TO ENTER MENUS BUTTON PRESS
Setup Steps MODE & FAN for 5 seconds
Time Schedule MODE & UP for 2 seconds
Emergency Heat UP & FAN for 2 seconds
Lockout Buttons MODE, UP & DOWN for 2 seconds
Calibration MODE & DOWN for 2 seconds, then MODE
Wireless Setup FAN for 5 Seconds (when schedule is inactive)
Table for button
presses that are
required for
entering various
menus

14
Setting the Clock and Day (setup steps 1-2)
When your thermostat is connected to Skyport Cloud Services, the
time and day of the week are controlled by Skyport. There is no local
adjustment, Skyport also adjusts the time for Daylight Savings Time as well.
To set the time and day when not connected to
Skyport; enter the setup screens by pressing the
MODE button and simultaneously pressing the
FAN button for 5 seconds.
Setup step 1 adjusts the clock. Use the Warmer/Up
or Cooler/Down buttons to adjust the time.
Press the MODE button to advance to step 2.
Select the day of the week using the Warmer/Up
or Cooler/Down buttons.
Leave the setup screens by again pressing the
MODE button and simultaneously pressing the
FAN button for 5 seconds.
Show Clock (setup step 3)
This setup step will allow for removal of the
clock and day of the week from the display.
OFF removes the time and day from the display.
Programmable (setup step 4)
When the very simplest operation is desired,
this thermostat may be configured to be non-
programmable, with or without Auto-Changeover.
If “ON” 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 “OFF” if you would like your thermostat to be
programmable, then the Program mode will be
accessible through the use of the MODE button.
Setup Steps