Bosch BCC50 Assembly instructions

Bosch
Connected Control
BCC50 Wi-Fi Thermostat
Installation Guide and User Manual
BoschHeatingAndCooling.com
GET THE MOST
OUT OF YOUR NEW
THERMOSTAT
Download The Bosch
Connected Control App
SEE PAGE 37
FOR MORE INFO

2
Compatibility
Thermostat Installation
Initial Setup
Advanced Settings
Troubleshooting
Wiring Diagrams
4
6
11
16
21
23
Table of Contents
Main Screen Thermostat
Icons
Temperature Setpoints
Installation Guide BCC50 User Manual
29
30
32
BCC App User Manual
Additional Features
BCC App
App Main Screen Overview
Setpoint(s) on the App
Schedule Overview
Alexa
Google Assistant
Warranty & Legal
33
33
34
34
35
35
36
36
Thermostat Overview
System
Fan
Accessory
Wi-Fi
Schedule
Display
Device Info
Factory Reset
37
38
39
40
42
42
43
43
43
App Menu Overview
Mode
Wi-Fi
Device Messages
Device Settings
System Settings
44
46
48
2

3
The Bosch Connected Control BCC50 Thermostat is compatible with the majority of 24VAC heating and cooling equipment to
help you save energy and money. Easily control your home's temperature from the intuitive interface using the 5 back-lit touch
buttons, the Bosch Connected Control smartphone app or your voice with the Bosch Connected Control Alexa Smart Home
Skill and your Alexa-enabled smart devices or with Google Assistant.
Connectivity
Connect to your HVAC equipment from anywhere
Sleek Design with Touch Buttons
Sleek design that will look great in your home, with
5 bright illuminated touch buttons & color screen
Programmable
Follows preset or user-defined schedules
Compatibility
Compatible with majority of HVAC systems
(requires C-wire)
Auto-on Safety Control
Keep your home safe using app alerts & auto-on feature
Enabled Smart Devices Compatible
Works with Google Assistant or Alexa
HVAC Filter Reminder
Get alerts when its time to replace your system's filter
Meet the Bosch Connected Control (BCC50 Thermostat)

4
Compatibility
u A C-wire (common wire) is required to power the unit
Two wire systems are not supported. If a C-wire is not
readily available, we recommend you seek professional
support from your local contractor.
u The Bosch Connected Control BCC50 Thermostat works
with most 24VAC systems, including gas, oil, propane,
electric, forced air, variable speed, heat pump and radiant.
The thermostat cannot support
u Line voltage thermostats
u Electric baseboard heaters
u Proprietary communicating thermostats
u Millivolt systems
u Remote sensors
Are you unsure of your system compatibility
or how to install your thermostat and need help?
u Self-support videos can be found on our website at:
BoschHeatingAndCooling.com/BCC50
u Contact our support team at 1-800-283-3787
Professional installation is recommended
for the following systems
u Dual Fuel systems (Heat Pump combined with a Furnace)
u Whole-home humidifiers and dehumidifiers

5
Included in the box
u Thermostat
u Wall Plate
u Screws & Wall Anchors
u Installation Guide and User Manual
u Wire Labels
Tools you will need
u Small flathead screwdriver
(for fastening the Wall Plate wire terminals)
u Medium Phillips screwdriver
(for attaching the Wall Plate to the wall)
u Smartphone
(for taking pictures of the existing wiring)
u Bosch Connected Control smartphone app
(for configuring the thermostat settings)
Tools you may need
u Needle-Nose Pliers (for pulling wires from the wall)
u Drill with 7/32” Drill Bit (for mounting wall anchors)
u Wire Stripper (for cutting and stripping wires)
u Multimeter (for testing circuit continuity)
u Pen or Pencil (for preventing wires from falling into the wall)
Installation Overview
Once you have everything you need, let’s get started!

6
Thermostat Installation
Turn OFF power
Turn off all power to your
HVAC (Heating, Ventilation,
and Air Conditioning) system
by using the master
equipment switch or
circuit breaker box.
Confirm that your system is off
Try to adjust the temperature on your old thermostat. If
you don’t hear the system turn on within 5 minutes, air
does not come out from the vents or the old thermostat
does not even power on, then you have successfully
turned off the power to your system.
Step 1 Step 2
Make sure your
old thermostat
Does Not Contain
Line Voltage Wiring
If you see any of these wire nuts,
unfortunately the BCC50 will not work
with your system. If you are unsure or
would like to discuss your options,
please contact a professional or our
support line: 1-800-283-3787.
Step 3
WARNING: Failure to turn off the power may
result in electrical shock and/or damage to the
equipment.
Remove the old thermostat from the
old wall plate
ON OFF
Y2 W2 G W C Y R RC
EL AUX G OB C Y R RC
OLD WALL PLATE
OLD THERMOSTAT

7
Take a picture of the existing wiring
Make sure that you can clearly read the terminal labels and
see which wires are connected to which terminal from your
photo. You will need to reference this
photo later during the initial setup.
Note: You can also use the wire labels
we have provided you to correctly
label each wire based on the terminal
where it is connected.
Step 4
Y2 W2 G W C Y R RC
EL AUX G OB C Y R RC
Confirm you have a C-wire connected
to your old thermostat wall plate
If you do not have a C-wire connected to your old
thermostat, please contact a professional or our support
line for further assistance to determine if the BCC50
Thermostat is compatible with your system.
Step 5
Y2 W2 G W C Y R RC
EL AUX G OB C Y R RC
Y2 W2 G W C Y R RC
EL AUX G OB C Y R RC
Disconnect the wires from the old thermostat and
remove the wall plate using a screwdriver
Some thermostats will also require you to use a screwdriver to
disconnect the wires. After the wires are disconnected and
the wall plate removed, we recommend wrapping a pen or
pencil around the wires to prevent them from falling back into
the wall.
Step 6
Step 7
Note: If the new Wall Plate
does not cover up any
holes or unpainted spaces
left by your old thermostat,
use this opportunity to
patch any holes and paint.
Pull thermostat wires through the hole in the center
of the BCC50 wall plate and mark the location of
the mounting screws
It is recommended to use the BCC50 Wall Plate as a reference
guide to mark the mounting holes and ensure that
all holes and unpainted
surfaces are covered.

8
Drill and insert wall anchors (if necessary)
Drill two 7/32” holes where you marked the location of the
mounting screws and then insert the wall anchors provided
into these mounting holes.
Check if the wall plate is level and insert screws
Make sure your new BCC50 wall plate is level and insert the
included screws from the package and mount your new wall
plate to the wall using a Phillips head screw driver.
Step 8 Insert each wire into the corresponding
terminal and close each terminal using a
flat head screw driver
Use the image you took with your
smartphone of your old thermostat wiring
or the wire labels as a reference for where
to place each wire. Be sure that you insert
each wire, one by one, and then
immediately close the terminal and confirm
that the wire is secure inside the terminal
before moving to the next wire. Repeat this
process for each wire to be installed. If you
are unsure of the terminal names on the
BCC50 Wall Plate, refer to BCC50 Terminal
Key on the next page:
Step 9
SMALL
FLAT HEAD
SCREWDRIVER
NEEDED
PHILLIPS HEAD
SCREWDRIVER NEEDED
Thermostat Installation
LEVEL

9
R/RC
R/RC
Note: The color of your wires may not be the same as shown
(1)Emergency Heat and Auxiliary Heat activated at W/E/AUX
BCC50 Terminal
After all wires are securely connected,
gently push any excess wires back into
the hole in the wall
Step 10
Attach the BCC50 thermostat to the
BCC50 wall plate
Step 11
PUSH
HOOK
CLICK
BCC50 Terminal Key
Not Used
C-wire (common)
1st Stage Heating1
1st Stage Compressor
Heating Appliance Power
Cooling Appliance Power
Not Used
Fan
Not Used
2nd Stage Compressor
2nd Stage Heating
Humidifier/Dehumidifier
Reversing Valve
R/RC

10
Step 12 Step 13
Turn ON the power to
your HVAC by using the
master equipment switch
or circuit breaker box
The thermostat will power on
and display a Bosch logo and
loading bar.
Note: After loading completes,
the thermostat will display the
following screen:
ON OFF Great Job, The Hard Parts Over!
Next get your smartphone and visit your app
store. Download the Bosch Connected Control app
to setup your new BCC50
Your BCC50 Thermostat is not yet configured to your home’s
HVAC system. Go to the App Store or Google Play to download
the app, create an account and finish configuring your system.
Three ways to download the
Connected Control App:
u In the App Store or Google Play,
search “Bosch Connected Control” or
“BCC50” and then download the app.
u Visit www.bosch-climate.us/bcc50
or scan QR code below. Click the
links for the app in the Download
App section.
Thermostat Installation

11
Initial Setup
User Account Setup
1. After downloading the Bosch Connected Control app,
open the app on your smartphone and click the Register
button to create a new account.
2. Read and accept the Terms and Conditions and Privacy
policy, and press continue in the top right hand corner.
3. Follow the on-screen instructions to create your account
and then press OK at the bottom of the screen.
4. After a successful registration, you can use your newly
created user ID and password to log into your account.
Note: You will also receive a confirmation email from the
Bosch Team confirming your account creation.
Add Device
1. After signing into your account, click the plus sign (+) in the
top right hand corner to add a new device.
2. On the next screen, click the device you would like to add,
in this case the BCC50.
3. Return to your thermostat and click Ok to initiate the Initial
Setup. Return to your app, and follow the on-screen
instructions to connect the BCC50 Thermostat to your
home’s Wi-Fi network.
Note: If you skip this step, you will be required to repeat the
initial setup in the future to make any changes or
adjustments to the thermostat settings.
4. After you have successfully connected to your home’s Wi-Fi
Network, follow the on-screen instructions to name your
thermostat and connect your smartphone directly to the
thermostat to complete the initial setup.
5. Use the up and down arrows on your thermostat to change
between Automatic Entry and Manual Entry.
6. If your thermostat is unable to connect to the app, follow
the on-screen instructions.
7. After the Initial Setup, the Thermostat will say ‘You are
connected to the app. Please follow the guided setup
process in your app’
Note: You can use the QR code scanner by clicking the QR
icon in the Device SSID field to automatically enter the
Device SSID and Device password by scanning the QR code
on your thermostat. You can also manually enter the
information into the app using the information provided on
the thermostat.

12
If you have a furnace
1. Select Fossil Fuel and click the setup button to the right
2. Then select Appliance or Thermostat depending on your
personal preferences for fan control.
3. Click Next at the bottom of the screen to continue.
Initial Setup
If you have a dual fuel system
1. Select Dual Fuel and click the setup button to the right
2. Then follow the on-screen instructions to configure the
fossil fuel heating appliance settings
3. Click Next at the bottom of the screen to continue.
Then follow the on-screen instructions to configure
the heat pump heating appliance settings.
If you have a heat pump
1. Select Heat Pump and click the setup button to the right
2. Then follow the on-screen instructions.
3. Click Next at the bottom of the screen to continue.
If you have a boiler
1. Select Fossil Fuel and click the setup button to the right
2. Then select Appliance
3. Click Next at the bottom of the screen to continue.
Unit Configuration
Select your Heat Type according to the heating appliance
located in your home. Below is a list of helpful tips that may
guide you to selecting the correct option for your home.
Note: If you are unsure of which option to select, contact
your local contractor or our support line: 1-800-283-3787.

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If you have an electric system:
Select Electric and click Next at the bottom of the
screen to continue.
If you have no heating appliance:
Select No Heating and click Next at the bottom of the
screen to continue.
Select your stage configuration:
According to the heating and cooling appliances you
have in your home and then click Next.
4. Use the Balance Point to set the outdoor temperature value
the thermostat will use to switch between your heat pump
and fossil fuel appliance. Above this value, your thermostat
will use your heat pump to heat your home and below this
value, your thermostat will use your fossil fuel heating
appliance.
5. Use the Change over Delay to set the time the system will be
off when changing between heat pump and fossil fuel
heating sources. This delay allows for the coil to cool before
switching between heating appliances.
Note: In a dual fuel system, the BCC50 automatically enables
auxiliary heating and emergency heating using the fossil fuel
heating appliance.
Note: In a dual fuel system, the BCC50 will stage up from
heat pump to fossil fuel following the stage settings, which
can be modified in Advanced Settings > Installer Access > by
using the ST Action Code.
6. Click Next at the bottom of the screen to continue.
If you have a whole home humidifier or dehumidifier
accessory wired to your thermostat, select the type of
accessory you have in your home; otherwise, click None
and then click Next.
Note: Professional installation is recommended for humidifiers
and dehumidifiers.
If you have a Humidifier:
1. Select Humidifier and click the setup button to the right.
2. Then select Evaporative or Steam following the on-screen
instructions.
3. Click Next at the bottom of the screen to continue.
If you have a Dehumidifier:
1. Select Dehumidifier and click the setup button to the right.
2. Then enabled or disabled Cool to Dehumidify following the
on-screen instructions.
3. Click Next at the bottom of the screen to continue.
Need Help?
If you are unsure of which option to select,
contact your local contractor or our
support line: 1-800-283-3787.

14
Initial Setup
Date & Time
Follow the on-screen instructions to set the date and time of
BCC50 Thermostat and then click Next.
Schedule
1. Choose the schedule you would like to modify or click No
Schedule if you do not wish to set up a schedule at this
time, and click Next.
Note: Home is the default schedule for your BCC50. If you
wish to add a different schedule, click the plus (+) button in
the top right hand corner of the screen.
2. To set up your periods for the day, click on the Start Time
bubble of the period and use the scroll wheel to set the
start time of the first period of the day.
3. Next, click the Heat bubble and use the scroll wheel to set
the heating setpoint for the first period of the day.
4. Then, click the Cool bubble and use the scroll wheel to set
the cooling setpoint for the first period of the day.
Note: There is a 5 degree deadband required between
heating and cooling setpoints to prevent your equipment
from short cycling.
5. If you want to add more periods, then click add period
button and repeat the above 3 steps until you have set all
your periods for the day.
Note: You are allowed a maximum of 8 periods per day.
6. If you want to delete a period, swipe left on the period and
click delete.
7. After you have set up one day of the week, use the Copy
section to mirror the same daily schedule to other days of
the week by clicking on the days you would like to copy that
daily set of periods. Then click next.
Note: If you have not copied your schedule to all 7 days of
the week, you will be required to repeat the above steps until
you have set a schedule for everyday of the week.
Need
Screen

Review
Review your BCC50’s Initial Setup configuration and click Complete if you are happy with the setup. If you would like to change
any of the settings, click on the section you would like to change to be brought back to that section of the Initial Setup.
Congratulations!
You have finished the
installation and setup of
your BCC50 Thermostat.
Thank you for choosing
Bosch and enjoy the
savings and comfort
of owning your
Bosch Connected
Control thermostat!
Choose Bosch,
Choose Comfort!
Maximum Comfort,
From Anywhere!
15

16
Advanced Settings
Advanced Settings allow HVAC professionals
the ability to modify specific thermostat
settings for better control of the heating and
cooling appliance(s). In order to access the
Advanced Settings of the BCC50
Thermostat, your thermostat must be
connected to Wi-Fi. The Advanced Settings
section is accessible from the Menu of the
BCC50 smartphone app.
NOTE: Advanced Settings are for
professional use only and require
Access Code: 1886
16

17
Advanced Settings
Heating & Cooling
u To access the Heating and Cooling, click Advanced Settings, and enter the Professional Access Code
u Click on a setting and use the scroll wheel to modify the default value. From this menu you can adjust:
TITLE Default Max Min Description
Fan Delay On 15 Seconds 120 Seconds 0 Seconds The fan’s lag time after the heating or cooling call is initiated when in Fossil Fuel,
Heat Pump, or Cooling operation.
Fan Delay On Elec 0 Seconds 5 Seconds 0 Seconds The fan’s lag time after the heating or cooling call is initiated when in Electric,
Auxiliary, or Emergency operation.
Fan Delay Off 60 Seconds 120 Seconds 30 Seconds The fan’s lag time after the heating or cooling call is terminated.
Min. Run Time 5 Minutes Stage Delay 3 Minutes The minimum amount of time the system will cycle upon engagement.
Anti Short Cycle 5 Minutes 5 Minutes 0 Minutes The Anti Short Cycle (ASC) timer represents the minimum amount of time the
system will remain off upon stage down engagement.
Cycle Time 180 Seconds 300 Seconds 60 Seconds Time delay between active heating and cooling transition
Zero Energy
Band Heating 1° F/ 0.5° C 2° F/ 1° C 0.5° F/ 0.3° C A temperature range between the current temperature and the heating set point, where heating is not engaged (also called deadband).
Zero Energy
Band Cooling 1° F/ 0.5° C 2° F/ 1° C 0.5° F/ 0.3° C A temperature range between the current temperature and the cooling set point, where cooling is not engaged (also called deadband).

18
Advanced Settings
Installer Access
u To access the Installer Access,click Advanced Settings, enter the Professional Access Code and click Installer
u Enter any one of the Action Codes in parenthesis below to gain access to that specific setting:
Humidity Calibration (HC)
Ability to adjust humidity readings to improve sensor accuracy as the thermostat nears the end of its lifecycle
after years of use.
Relative Humidity Hysteresis (HSD)
A humidity range between the current humidity and humidity set point, where the humidifier or dehumidifier
is not engaged (also called a deadband)
Initial Setup (IS)
Use this code to repeat the initial setup process.
Sensor Calibration (SC)
Ability to adjust temperature readings to improve sensor accuracy as the thermostat nears the end of its
lifecycle after years of use.
Sensitivity Level (SS)
Ability to adjust how sensitive your thermostat sensor is to changes in the air temperature. The lower the level,
the more your system cycles to maintain the setpoint.
Staging (ST)
Ability to adjust 3 configuration options for custom stage up and stage down control. Refer to next page.
Unit Configuration (UC)
Use this code to repeat the unit configuration process.

19
Latching
Enables staging logic that will
not cycle between stages
until the setpoint is met.
Stage Delay
Set the time delay between the
stage up logic for non-latching,
multi stage equipment.
Stage Temp
Set the temperature delay
between the stage up and stage
down logic for non-latching, multi
stage equipment.

20
Advanced Settings
Device Log
u To access the Device Log, click Log on the Advanced Settings
screen and enter the Professional Access Code.
u The Device Log stores up to 90 days’ worth of thermostat activity.
To view historical data, select the time period you would like to view.
Then select the function you would like to view:
Functions
u Adjustment shows changes to temperature set point and hold
u Operation mode shows changes to system mode, fan mode,
and power switching
u Device Alerts shows temperature warning information
u General shows changes to temperature units, date,
and screen brightness
u Other shows all other information that the thermostat stores