Bosch TSTBT4H2CP-M--A User manual

Owner’s Manual Thermostat
Series
BOSCH COMMUNICATING THERMOSTATS
TSTBT4H2CP SERIES
TSTBT4H2CP-M--A
TSTBT4H2CPHM--A
6 720 220 380 Revised 06-13

6 720 220 380 Subject to change without prior notice Revised 06-13
2TSTBT4H2CP SERIES
TABLE OF CONTENTS
The TSTBT4H2CP Series offers:................................... 3
Thermostat Application Guide ..................................... 3
TSTBT4H2CP Series Thermostat Quick Reference ...... 4
Features of the Transmitting and Receiving Module
(TRM)........................................................................... 5
Installing the TSTBT4H2CP Thermostat Series............ 6
Wall Locations ............................................................. 6
Installing the TRM Receiving Module ........................... 6
Temperature Sensor Connections ............................... 7
TS1 and TS2 ................................................................ 7
Remove the Battery Tab ............................................... 8
Install the Thermostat on the Sub-Base ....................... 8
Displaying and Resetting the Service Messages .......... 9
Fault Codes.................................................................. 9
Enabling Fault Code Messages..................................... 9
Displaying Equipment Service Messages..................... 9
High Pressure Alert ...................................................... 9
Low Pressure Alert....................................................... 9
Freeze Condition Alert ............................................... 10
Condensate Line Alert ............................................... 10
Brownout Alert .......................................................... 10
Evaporator Freeze Alert ............................................. 10
Lost Equipment Communication ............................... 11
Lost Gateway Communication ................................... 11
Low Heating Output................................................... 11
Low Cooling Output................................................... 11
Lost Power................................................................. 11
Initial Thermostat Settings ........................................ 12
Selecting Heating or Cooling ..................................... 12
Selecting Auto or Cont Fan ........................................ 12
Adjusting the Temperature Setting. ........................... 12
Adjusting RH Setpoints for Humidity Control............. 12
Selecting Operating Mode ......................................... 12
Setting the Time and Day of the Week........................ 13
Schedule Programming.............................................. 13
7 Day Program Schedule............................................ 14
Custom Program Schedule ........................................ 14
Locking the Thermostat ............................................. 15
Hidden Lock key......................................................... 15
Displaying the Time and Temperature Schedule ........ 15
TSTBT4H2CP Thermostat Series Installation
Troubleshooting ........................................................ 17
Available Accessories for the
TSTBT4H2CP Thermostat Series ............................... 18
Product Limited Warranty.......................................... 19
Warranty Coverage .................................................... 19
Items Not Covered ..................................................... 19
Limited Warranty ....................................................... 20
Warranty Claims Process ........................................... 20

6 720 220 380
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TSTBT4H2CP SERIES 3
Thermostat Application Guide
The Bosch TSTBT4H2CP Thermostat Series consists of
4-wire MODBUS communicating thermostats. Utilizing
RS485 MODBUS protocol, the TSTBT4H2CP Thermostat
Series can communicate with the equipment, monitor the
performance, and report the status of the equipment.
The MODBUS protocol is received and then translated to
pulses to be received by the HVAC equipment. This
translation is performed by the TRM (Transmitting and
Receiving Module). The thermostat and TRM
communicate via 2 wire MODBUS, the TRM and the HVAC
equipment communicates via 4-12 wires utilizing pulses.
The Bosch TSTBT4H2CP Thermostat Series
communicates utilizing MODBUS protocol to the TRM
THE TSTBT4H2CP SERIES OFFERS:
• ModbusthermostatwithlargeLCDandtouch
screenwith blue LED back lighting
• Lowbacklightlevelwhentouchkeysnotused
• Fourschedulesperday,7-dayprogrammable
• Uptofour-stageheatingand2-stagecooling
• Optionalautomaticfanoperationduringdaytimeon
selected days
• Compatiblewithconventionalanddualfuelheatpumps
and gas electric systems
• Optionaltemperaturesensorsfordis-chargeair
temperature and outdoor air temperature
• Optionalremotespacetemperaturesensors
• Diagnosticmonitorindicatesequipmentalertsandloss
of communications
• Servicemonitorsforlter,UVBulbandhumidierpad
• Optionalkeyboardlock
• ReceivingModuleCOMLEDblinksduring
Modbuscommunication and turns red if communication
with thermostat is lost
• Optionalreturnairtemperaturesensormaintainssafe
space temperature if communication with thermostat is
lost for 10 minutes
THERMOSTAT APPLICATION GUIDE
Description Available
Gas or Oil Heat Yes
Electric Furnace Yes
Heat Pump (No Aux. or Emergency Heat) Yes
Heat Pump (With Aux. or Emergency Heat) Yes
Multi-Stage Systems Yes
Heat Only Systems Yes
Cool Only Systems Yes
Dual Fuel Systems Yes
Milivolt Yes
Humidier Control Yes
Auto Changeover Yes
MODBUS Communicating Yes

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4TSTBT4H2CP SERIES
TSTBT4H2CP SERIES THERMOSTAT QUICK REFERENCE
Getting to know your thermostat
Insid e
We
Day
HEAT
Schedule
AUTO
FANMENU MODE NEXT ENTER
Heat
Set To
SYSTEM
AM
Displays heating, cooling or RH setpoint.*
Up and Down keys used
to adjust setpoints.*
System key selects Off, Heat only,
Em Heat, Cool only or Autmatic
Heat/Cool.
Displays the indoor temperature when
setting the heating or cooling or the indoor
RH% when setting the RH setpoint*.
Switches the setpoint display between
heating, cooling or RH%*.
Mode key selects between Schedule,
temporary Hold or continuous Hold.
Menu key used to display
User menu selection.
Battery charge indicator
(program saving battery
only; the battery will not
power the thermostat)
.
Displays the schedule period,
Morning, Daytime, Evening or Night.
Displays the operating mode,
Schedule, Temporary Hold or Hold.
Displays time of day and weekday
Inside
Outside
Option
Message
Filter
HumPad
UV Bulb
Zone
WeTuMo
MornDay EveNight
Th Fr Sa Su
Home
Locked
AuxHeat RH%
ON
HEAT
AUTO
OFF
COOL
Schedule
Temp Hold
Vacant
Clean
AUTO
FANMENU MODE NEXT ENTER
EmHeat
Com
HeatCool RH%
FrAi r
Set To
SYSTEM
PM
AM
Filter, HumPad or UV Bulb will blink when
service is required. Press the hidden key
area to reset the service timers after
servicing the equipment.
Press the hidden Lock key when
the Lock feature is enabled to
lock or unlock the keys using the
2-digit code.
Press the hidden clock key to set the
time of day and weekday.
Press the hidden Message key
when blinking to display the
equipment alert messages.
Press the hidden schedule key
to program the Morning, Day,
Evening and Night schedules.
When in a menu setup, this
MODE button is blank and is
used as a Cancel button.
*Humidity Features only available with the TSTBT4H2CPHM--A model and the TSTBT4H2CPHMW-A model.
Fan key selectsAutomatic or On.
Previous key when in programming mode
Quick Reference
Caution
MENU, MODE, NEXT, & ENTER buttons change
functionalities during programming or other type of menu
setting changes. Their function is described for that specifi c
function within the Tech Setup Section.
Insid e
We
Day
HEAT
Schedule
AUTO
FANMENU MODE NEXT ENTER
Heat
Set To
SYSTEM
AM
Displays heating, cooling or RH setpoint.*
Up and Down keys used
to adjust setpoints.*
System key selects Off, Heat only,
Em Heat, Cool only or Autmatic
Heat/Cool.
Displays the indoor temperature when
setting the heating or cooling or the indoor
RH% when setting the RH setpoint*.
Switches the setpoint display between
heating, cooling or RH%*.
Mode key selects between Schedule,
temporary Hold or continuous Hold.
Menu key used to display
User menu selection.
Battery charge indicator
(program saving battery
only; the battery will not
power the thermostat)
.
Displays the schedule period,
Morning, Daytime, Evening or Night.
Displays the operating mode,
Schedule, Temporary Hold or Hold.
Displays time of day and weekday
Inside
Outside
Option
Message
Filter
HumPad
UV Bulb
Zone
WeTuMo
MornDay EveNight
Th Fr Sa Su
Home
Locked
AuxHeat RH%
ON
HEAT
AUTO
OFF
COOL
Schedule
Temp Hold
Vacant
Clean
AUTO
FANMENU MODE NEXT ENTER
EmHeat
Com
HeatCool RH%
FrAi r
Set To
SYSTEM
PM
AM
Filter, HumPad or UV Bulb will blink when
service is required. Press the hidden key
area to reset the service timers after
servicing the equipment.
Press the hidden Lock key when
the Lock feature is enabled to
lock or unlock the keys using the
2-digit code.
Press the hidden clock key to set the
time of day and weekday.
Press the hidden Message key
when blinking to display the
equipment alert messages.
Press the hidden schedule key
to program the Morning, Day,
Evening and Night schedules.
When in a menu setup, this
MODE button is blank and is
used as a Cancel button.
*Humidity Features only available with the TSTBT4H2CPHM--A model and the TSTBT4H2CPHMW-A model.
Fan key selectsAutomatic or On.
Previous key when in programming mode

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TSTBT4H2CP SERIES 5
Transmitting and Receiving Module
FEATURES OF THE TRANSMITTING AND RECEIVING MODULE (TRM)
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Features, Receiving Module HVAC Status
Optional Return Air Temperature Sensor
Optional Temperature Sensors
Modbus Thermostat Communication
De-Humidication Control
Humidifier Control
Equipment Monitor
Communication Status
HVAC Control
Red if heating call, blinks during second stage heating call.
If communication is lost between the Receiving
Module and Thermostat for 10 minutes, the sensor
is used to control the space temperature.
TS1 and TS2 can be used to monitor dis-charge air temperature,
outdoor temperature or can be used as remote space temperature
sensors. See Installer options 13 and 14.
A 4-wire thermostat cable between the Receiving
Module and the Thermostat provides Modbus
communication using RS485.
The HUM terminal can be used to
control de-humidification using the
cooling or hot gas reheat.
These terminals are used to
control a humidifier.
The PDU terminal is used to monitor
Bosch equipment and indicate any
alert messages at the Thermostat.
Blinks green during Modbus communication
with thermostat and turns red if communication with
thermostat fails 10 times.
Terminals can be configured for
conventional or dual fuel heat
pumps or gas/electric systems.
Yellow if cooling call, blinks during second stage cooling call.
Green if fan call.
Caution
Mercury Notice: All Bosch thermostats are
mercury free. However, if the product you are
replacing contains mercury, dispose of it properly.
Your local waste management authority can give
you instructions on recycling.

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6TSTBT4H2CP SERIES
INSTALLING THE TSTBT4H2CP
THERMOSTAT SERIES
Caution
A trained, experienced technician must install this
product. Carefully read these instructions. You could
damage this product or cause a hazardous condition if
you fail to follow these instructions. See the product
specifi cations at the end of this manual prior to installing.
WALL LOCATIONS
Do not install thermostats in locations that are:
• OnanexteriorWall
• Indirectsunlight
• Wheretheremaybeconcealedchimneysorpipes
behind the wall
• Closetoawindowordoorleadingoutside
• Closetoobjectsradiatingheatsuchasreplaces,
lighting, space radiators, or any other applicance
• Inareasthatdonotrequireconditioning
• Indeadspotsorwheredraftscanoccur(behinddoors
or in corners)
• Closetohotorcoldairducts
Caution
Pick an installation location that is easy for the
user to access. The temperature of the location
should be representative of the building.
Mounting the Thermostat
First,separatethethermostatandsub-baseusingaat
blade screw driver as shown below.
Screw driver
Rotate the screw driver tip so the thermostat separates
from the sub-base and then pull the thermostat away from
the sub-base.
Align the 4 tabs on the subbase with corresponding slots
on the back of the thermostat or base module. Then push
gently until the thermostat or base module.
Caution
To insure a solid fi t between the thermostat
and the subbase:
1. Mount subbase to a fl at wall
2. Use screws provided
3. Drywall anchors should be fl ush with the wall
4. Wires should be pushed into the wall
INSTALLING THE TRM RECEIVING MODULE
TRM stands for Transmitting and Receiving Module. The
TRM communicates with the TSTBT4H2CP Thermostat
Series using the MODBUS protocol and then translates
the MODBUS protocol to pulses and relays these signals
to the HVAC equipment.
The Receiving Module can be installed adjcent to or
within the HVAC equipment.
Secure to wall or equipment
with screws at top and bottom.
Remove these screws (4)
to access terminals.
Descriptive Part#
TSTB-TRM--6--A
P/N 7738002948
Receiving Module
24VAC, 2VA, No Load
Made in USA
COM
HVAC
There are two LED lights on the TRM. One is the COM
light which blinks green when communication is
happening between the TRM and the thermostat. This
light will normally blink about every 10 seconds as the
thermostat and TRM are in constant communication for
status updates. If communication is lost for more than 10
minutes,theCOMLEDwillbecomered.Acertied
licensed technician should be called to service the system
if this occurs.
The other LED is labeled HVAC. This light indicates if the unit
is actively heating or cooling. If the unit is cooling, then the
LED is yellow, if the unit is in heating, then the LED is red. If
thethermostatissatised,thentheLEDifoff.
Installing the Thermostat

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TSTBT4H2CP SERIES 7
Terminal Designations on the TSTBT4H2CP Thermostat Series
3 Heat / 2 Cool Conventional System 3 Heat / 2 Cool Heat Pump System 4 Heat / 2 Cool Heat Pump System
C24 Volt Common 24 Volt Common 24 Volt Common
R24 Volt Power 24 Volt Power 24 Volt Power
OEnergized in Cooling Energize Reversing Valve in Cooling Energize Reversing Valve in Cooling
BEnergized in Heating Energize Reversing Valve in Heating Energize Reversing Valve in Heating
W1 Heating - 1st Stage Aux Heating - 1st Stage Aux Heating - 1st Stage Aux / Emergency Heat
W2 Heating - 2nd Stage Aux Emergency Heat Relay Heating - 2nd Stage Aux
Y1 Compressor - 1st Stage Cooling Compressor - 1st Stage Heating/Cooling Compressor - 1st Stage Heating/Cooling
Y2 Compressor - 2nd Stage Cooling Compressor - 2nd Stage Heating/Cooling Compressor - 2nd Stage Cooling
GFan Relay Fan Relay Fan Relay
DH "Cool to Dehumidify Relay
(Cooling Mode Only)”
“Cool to Dehumidify Relay
(Cooling Mode Only)”
“Cool to Dehumidify Relay
(Cooling Mode Only)”
HUM "Humidi er Contact Relay
(Dry Contact-Heating Mode Only)”
“Humidi er Contact Relay
(Dry Contact-Heating Mode Only)”
“Humidi er Contact Relay
(Dry Contact-Heating Mode Only)”
HUM “Humidi er Contact Relay
(Dry Contact-Heating Mode Only)”
“Humidi er Contact Relay
(Dry Contact-Heating Mode Only)”
“Humidi er Contact Relay
(Dry Contact-Heating Mode Only)”
ALR This terminal is used only for Bosch / Florida Heat Pump Equipment. This connection is used for fault code communication from the
UPM board in the heat pump. The fault type being transmitted will be displayed on the thermostat. Do not use with any other equipment.
Caution
TSTBT4H2CP Thermostat Series Wiring
Notes: Bosch Water Source Heat Pumps
utilize “O” type reversing valve operation. If
your heat pump utilizes “B” type reversing
valve operation, substitute the wiring for the
“O” terminals for “B”.
TEMPERATURE SENSOR CONNECTIONS
ZONB-LAS---M--A Return Air
Temperature Sensor
Optionally, a temperature sensor can be installed in the
return air duct. This sensor is automatically detected by
the TRM and used to control the equipment should the
communication between the thermostat and TRM fail.
This insures the indoor temperature does not drop below
55°F or rise above 85°F.
Use AWG 18–22 thermostat wire to connect the sensors
to the TRM.
TS1 AND TS2
Temperature sensor 1 and Temperature sensor 2 inputs on
theTRMcanbeconguredinthethermostatsetupmenuas
an outdoor temperature sensor, a leaving air temperature
sensor, or as a remote room temperature sensor.
Either TS1 or TS2 can be designated as the outside air
temperature sensor, however once one of the input
sensors are designated as the outdoor temperature
sensor, the option will not be available for the other
sensor input in the menu setup. The same logic applies for
the leaving air temp. You cannot have two sensor inputs
designated as outdoor temperature or leaving air temp.
For the remote room temperature sensor function, either
TS1 or TS2 can be desingnated or both can. Two remote
room temp sensors are allowed.
TS1 Used as Outdoor Temperature Sensor
An outdoor temperature sensor is required for dual fuel
heal pumps and for automatic emergency heat activation
in cold weather. The sensor should be installed under the
eves and in the shade.
Temperature Sensor Connections

6 720 220 380 Subject to change without prior notice Revised 06-13
8TSTBT4H2CP SERIES
TS1 Used as Leaving Air Temperature
Sensor
A sensor can be installed in the supply duel to monitor the
Leaving air temperature for monitoring equipment
performance. The stainless steel tube should inserted in
the duct down stream from the plenum.
TS1 Used as a Remote Space
Temperature Sensor
A sensor can be installed in a remote location, such as the
secondoor,andthetemperatureattheremotesensor
will be averaged with the sensor in the thermostat when
controlling the heating and cooling.
TS2 Temperature Sensor #2
When both TS 1 and TS2 are used as remote space
temperature sensors, both sensor readings will be
averaged with the thermostat sensor reading.
See the available accessories at the end of this manual for
compatibility, part numbers and descriptions for
ordering.
REMOVE THE BATTERY TAB
The TSTBT4H2CP-M--A Thermostat Series has a coin cell
battery for maintaining the clock, schedules, and user
settings during power outages. After the wiring of the
installation, remove the battery tab. Do not remove the
tab until the Receiving Module, Thermostat and
equipment wiring is complete.
INSTALL THE THERMOSTAT ON THE
SUB-BASE
Align the four prongs on the sub-base with the square
holes in the thermostat back cover and push the
thermostat onto the sub-base until it locks in place.
Battery Tab

6 720 220 380
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TSTBT4H2CP SERIES 9
DISPLAYING AND RESETTING THE
SERVICE MESSAGES
The“Filter”,“HumPad”or“UV Bulb”will blink whenever
theirservicehourshaveexceededthetimeintervalin
100s of hours for cleaning or replacement. After servicing
thelter,humidierpadorUVbulb,pressandholdthe
key area in gray for 4 seconds to reset the hours.
Inside
Filter
We
Day
HEAT
Schedule
AUTO
FANMENU MODE NEXT ENTER
Heat
Set To
SYSTEM
AM
Press and hold in this area
for 4 seconds to reset filter
monitor hours.
“Filter” linking
Ifmultipleagsareblinking,youwillhavetorepeatthe
processforeachag.
FAULT CODES
The TSTBT4H2CP Thermostat Series communicates with
a Florida Heat Pump or Bosch heat pump through the
compressor protection module (UPM) board. The UPM
communicates fault codes utilizing a combination of
pulses. The translating module deciphers these pulses
and relays the associated fault to be displayed on the
thermostat.
ENABLING FAULT CODE MESSAGES
Run a low voltage wire from the ALR-OUT terminal
connection on the UPM board to the PDU terminal on the
TRM.
Caution
This feature is only available with a Florida
Heat Pump or Bosch Heat Pump.
Caution
See page 8 for wiring diagram.
DISPLAYING EQUIPMENT SERVICE
MESSAGES
The word“Message”will blink anytime an equipment
service message is present. To display the message, Press
in the key area shown in gray for 4 seconds.
Inside
Message
We
Day
HEAT
Schedule
AUTO
FANMENU MODE NEXT ENTER
Heat
Set To
SYSTEM
AM
HIGH PRESSURE ALERT
The equipment has detected a high head pressure
condition and prohibited heating and cooling calls.
Contact your local contractor for service. Press the
ENTER key to return to normal thermostat display.
Message
HEAT
AUTO
FANMENU MODE NEXT ENTER
SYSTEM
Message
HEAT
AUTO
FANMENU MODE NEXT ENTER
SYSTEM
LOW PRESSURE ALERT
The equipment has detected a low head pressure
condition and prohibited heating and cooling calls.
Contact yourlocal contractor for service. Press the ENTER
key to return to normal thermostat display.
Service Messages

6 720 220 380 Subject to change without prior notice Revised 06-13
10 TSTBT4H2CP SERIES
Message
Message
HEAT
HEAT
AUTO
AUTO
FAN
FAN
MENU
MENU
MODE
MODE
NEXT
NEXT
ENTER
ENTER
SYSTEM
SYSTEM
Caution
HP & LP faults will indicate whether the fault
has occurred on compressor 1 or compressor
2. HP1 is a high pressure fault on compressor
1, LP2 is a low pressure fault on compressor 2
FREEZE CONDITION ALERT
The equipment has detected a freeze condition and
prohibited heating and cooling calls.
The sensor that has triggered this fault is monitoring the
refrigerant temperature between the TXV and the air coil.
The UPM board is aware of the mode of operation, and
this sensor will be monitored in the cooling mode.
Contact your local contractor for service. Press ENTER
key to return to normal thermostat display.
Message
HEAT
AUTO
FANMENU MODE NEXT ENTER
SYSTEM
CONDENSATE LINE ALERT
The equipment has detected a condensate line blockage
condition and prohibited cooling calls. Contact yourlocal
contractor for service. Press the ENTER key to return to
normal thermostat display.
Message
HEAT
AUTO
FANMENU MODE NEXT ENTER
SYSTEM
BROWNOUT ALERT
The equipment has detected a power brownout condition
and prohibited heating and cooling calls. Contact
yourlocal contractor for service. Press the ENTER key to
return to normal thermostat display.
Message
HEAT
AUTO
FANMENU MODE NEXT ENTER
SYSTEM
EVAPORATOR FREEZE ALERT
The equipment has detected a freeze condition and
prohibited heating and cooling calls.
The sensor that has triggered this fault is monitoring the
refrigerant temperature between the TXV and the water
coil. The UPM board is aware of the mode of operation,
and this sensor will be monitored in the heating mode.
Contact your local contractor for service. Press ENTER
key to return to normal thermostat display.
Message
HEAT
AUTO
FANMENU MODE NEXT ENTER
SYSTEM
Freeze Condition Alert