Bosch 3H/2C Installation & Operation Manual

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Bosch Programmable Thermostat

3H/2C Touch-Technology Thermostat

- Compatible with Bosch SM Water Source Heat Pumps

Installation, Operation & Application Manual

Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

Data subject to change

08.2016 | Bosch Thermotechnology Corp.

Installation, Operation & Application Manual Bosch 3H/2C Touch-TechnologyThermostat | 3

Table of Contents

1 Key to symbols and safety instructions 4

1.1 Key to symbols 4

1.2 Safety 4

2 Thermostat speciﬁ cations and features 5

2.1 Thermostat Controls 5

2.2 Thermostat features 5

2.3 Package contents/tools required 5

2.4 Speciﬁ cations 5

3 Installation 6

3.1 Removing existing thermostat 6

3.2 Battery installation and information 6

3.3 Installing thermostat 6

4 Wiring diagram 7

4.1 Terminal designator descriptions 7

7 Factory preprogramming 19

8 Troubleshooting 20

5 System setup and conﬁ guration 8

5.1 Connection to the UPM 8

5.2 Conﬁ guration of the UPM 8

5.3 Output chart 8

5.4 Conﬁ guration and thermostat lock 8

5.5 Locking & unlocking thermostat 8

5.6 Changing the lock code 9

5.7 Conﬁ guration mode 9

5.8 Conﬁ guration Mode Settings 9

6 Mode of operation 13

6.1 Icon Functions 13

6.2 Operating Modes 14

6.3 Testing the Thermostat 15

6.4 Setting the Time and Date 15

6.5 Setting the program schedule 16

6.6 View screen options 16

6.7 Viewing fault codes 17

6.8 Schedule override 18

6.9 Setting the vacation timer 18

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Data subject to change

Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

1 Key to symbols and safety instructions

1.1 Key to symbols

Warnings

Warnings in this document are identiﬁ ed by a warning triangle

printed against a grey background. Keywords at the start of a warning indicate the type and seriousness of the ensuing risk if measures to prevent the risk are not taken.

The following keywords are deﬁ ned and can be used in this document:

 DANGER indicates a hazardous situation which, if not avoided, will result

in death or serious injury.

 WARNING indicates a hazardous situation which, if not avoided, could

result in death or serious injury.

 CAUTION indicates a hazardous situation which, if not avoided, could

result in minor to moderate injury.

 NOTICE is used to address practices not related to personal injury.

1.2 Safety

Please read before proceeding

WARNING:

 Always turn off power at the main power supply before

installing, cleaning, or removing thermostat.

Read this manual carefully before installing or operating your new

thermostat. Make sure to save this manual for future reference.

WARNING:

 This thermostat is for 24 VAC applications only; do not use on

voltages over 30 VAC.

 Do not short across terminals of gas valve or system control

to test operation; this will damage your thermostat and void your warranty.

Important information

This symbol indicates important information where

there is no risk to people or property.

 All wiring must conform to local and national electrical and

building codes.

WARNING:

 Do not use air conditioning when the outdoor temperature

is below 50 degrees; this can damage your A/C system and cause personal injuries.

WARNING:

 Use this thermostat only as described in this manual.

WARNING: CLEANING AND MAINTENANCE

 Turn off the device and pull the plug before cleaning. Failure

to do so can cause electrical shock.

 Do not clean the air conditioner with excessive amounts of

water.

Data subject to change

 Do not clean the air conditioner with combustible cleaning

agents. Combustible cleaning agents can cause fire or deformation.

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2 Thermostat speciﬁ cations and features

2.1 Thermostat Controls

Alarm Indicator

Check Filter Indicator

Left Arrow (Go Back)

Figure 1

2.2 Thermostat features

 7-Day, 5-2-Day, or 5-1-1- Day Programmable

 Configurable for Multiple Systems

 Large Display with Backlight

 Selectable Fahrenheit or Celsius

 Icon Indicator Lights

 Relay Outputs – Minimum Voltage Drop in Thermostat

 Remote Sensor Compatible

 Ideally Suited for:

— Residential (New Construction/Replacement)

— Light Commercial

 Service Alarm

 Fault Detection and History

CALL

SERVICE

TECH

t /C

HomeMode (Hea

ool) Fan Schedule

2.4 Speciﬁ cations

Description Value

Electrical Rating:

DC Power: 3.0 VDC (2 “AA”Alkaline batteries)

Temperature Control Range: 45°F to 90°F (7°C to 32°C) Accuracy: ±1°F (±0.5°C)

Anti-short Cycle

Backlight Operations: 15 seconds

Table 1

Up Arrow

Down Arrow

Right Arrow (Forward)

24 VAC (18-30 VAC), 1 amp maximum per output terminal,

5 amp maximum total load

4 minutes (bypass anti-short cycle delay by returning to

OFF mode and pressing the

icon).

2.3 Package contents/tools required

Package includes:

 Thermostat, base

 Wiring labels

 Screws and wall anchors

 2 “AA” Alkaline batteries

 Installation, Operation and Application Manual

Tools required for installation:

 Drill with 3/16” bit,

 Hammer

 Screwdriver

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Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

3 Installation

3.1 Removing existing thermostat

DANGER: ELECTRICAL SHOCK HAZARD

 Turn off power at the main service panel by removing the fuse

or switching the appropriate circuit breaker to OFF position before removing the existing thermostat.

1. Turn oﬀ power to heating and cooling system by removing the fuse or switching the appropriate circuit breaker oﬀ .

2. Remove cover of old thermostat; this should expose the wires.

3. Label the existing wires with the enclosed wire labels before removing wires.

4. After labeling wires, remove wires from wire terminals.

5. Remove existing thermostat base from wall.

6. Refer to the following section for instructions on how to install this thermostat.

3.2 Battery installation and information

Two “AA” alkaline batteries are used for backup power only. They are installed into the back of the thermostat. Orient them in the correct direction as shown on the plastic thermostat case.

The batteries should be changed yearly to prevent leakage from damaging the thermostat and voiding your warranty.

If the batteries are not changed or low and the thermostat is not connected to 24 VAC or loses 24 VAC power, the thermostat will eventually display and conserve energy by maintaining a lower setpoint in heating and a higher setpoint in cooling.

3.3 Installing thermostat

DANGER: ELECTRICAL SHOCK HAZARD

 Turn off power at the main service panel by removing the fuse

or switching the appropriate circuit breaker to OFF position before removing the existing thermostat.

CAUTION:

 Thermostat installation must conform to local and national

building and electrical codes and ordinances.

Mount the thermostat about ﬁ ve feet above the ﬂ oor. Do not mount the

thermostat on an outside wall, in direct sunlight, behind a door, or in an area aﬀ ected by a vent or duct.

1. Turn oﬀ power to heating & cooling system by removing the fuse or switching the appropriate circuit breaker oﬀ .

2. To remove sub base, pull it from the thermostat.

3. Put thermostat sub base against the wall where you plan to mount it (be sure wires will feed through the wire opening in the sub base of the thermostat).

4. Mark the placement of the mounting holes.

5. Set thermostat sub base and thermostat away from working area.

6. Using a 3/16” drill bit, drill holes in the places you have marked for mounting.

Data subject to change

7. Use a hammer to tap supplied anchors in mounting holes.

8. Insert stripped, labeled wires in matching wire terminals. Tighten screws to secure wires.

CAUTION:

 Be sure exposed portion of wires does not touch other wires.

9. Gently tug wire to be sure of proper connection. Double check that each wire is connected to the proper terminal.

10. Install 2 “AA” batteries into back of thermostat.

11. Snap thermostat onto the sub base.

12. Turn on power to the system at the main service panel.

13. Conﬁ gure thermostat to match the type of system you have.

14. Test thermostat operation as described in “Testing the Thermostat”.

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4 Wiring diagram

UPM

OUT

ALR

COM

Figure 2

Factory installed jumper between RH and RC is required.

Thermostat is powered between RH & C.

Transformer

120 VAC

24 VAC

Cool/Compressor #1

Heat #1/Reversing Valve

Heat #2

Cool/Compressor #2

Heat #3

Fan

W1 O/B

AUX

T H E

R M O

4.1 Terminal designator descriptions

 A – Alarm/display (24 VACinput, switched from RH)

 RC, RH – 24 VAC hot

 C – 24 VAC common

 Y1 – 1st stage cool, 1st stage heat for heat pumps

 Y2 – 2nd stage cool for 2-stage or 2-compressor systems. 2nd stage heat

for 2-stage or 2-compressor heat pump systems.

 G – Fan

 W1/O/B – Configurable

— W1 – 1st stage heat for non-heat pump systems

— O – Cool active reversing valve

— B – Heat active reversing valve

 W2 – 2nd stage heat for 1 compressor heat pump and non-heat pump

 AUX – 3rd stage heat

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Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

5 System setup and conﬁ guration

5.1 Connection to the UPM

The UPM’s ALARM COM terminal should be connected to R on the UPM board (refer to unit manual for more information), and the ALARM OUT terminal should be connected to the A terminal on the thermostat. The UPM must be conﬁ gured as described in Section 5.2.

5.2 Conﬁ guration of the UPM

The ALARM DIP switch on the UPM has to be set to the ON position (“PULSE”). Simply push the right side of this switch, so it is down on the right side and up on the left side.

CONT

YES

UPM

PULSE

ALR

DISPLAY

OUTCOM

4321

LOCKOUT

RESET ALARM

TEST

The thermostat is conﬁ gurable for all systems. The conﬁ guration directly aﬀ ects the outputs. Use the output chart to correctly conﬁ gure and wire the thermostat to your system.

5.4 Conﬁ guration and thermostat lock

During Conﬁ guration Mode, certain settings are protected by a numeric code access screen to prevent unintentional changes that could potentially damage the system or create a dangerous condition.

Whenever changes are attempted to one of the critical settings, the unlock code screen will appear:

The unlock code for these critical settings can be found during the power-up sequence.

The large number (indicated by “98” in the diagram) is the code that will unlock the desired conﬁ guration setting. The smaller numbers (indicated by “93” and “82” in the diagram) are codes used to lock and unlock your thermostat to prevent tampering.

To view the default codes for your thermostat, remove the thermostat from the sub base and, if using batteries, remove one battery for 10 seconds. Replacing the batteries or reinstalling thermostat will cause the codes to display for approximately 5 seconds.

Y1 W/O/B G W2 Y2 AUX

RH RC

Thermostat Back Plate

Figure 3

5.3 Output chart

Description 1st Cool 2n d Cool 1st Heat 2nd Heat 3rd Heat

W1, W2,

AUX, G*

Y1, W2,

AUX, G, B

Y1, Y2, W2,

G, B

N/A

Heat/Cool Y1, G YI, Y2, G W1, G* W1, W2, G*

Heat Pump (one compressor, single stage )

Heat Pump (one compressor, two stage and two compressor.)

Emergency Heat (heat pump only)

Y1, G, O Y1, G, O Y1, G, B

Y1, G, O

N/A N/A W2, G

Y1, Y2,

G, O

Y1, G, B

Y1, W2,

G, B

Y1, Y2,

G, B

W2, AUX**,

Table 2

* G not on for gas/oil systems

** One compressor only

Figure 4

5.5 Locking & unlocking thermostat

 Press , then , then

 Use & to select digit.

 Use & to set number.

 Press to lock or unlock.

LOCK

Write your

codes here

Thermostat lock code

, then

Data subject to change

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5.6 Changing the lock code

To change the lock code, do the following:

1. Press , then press until Lock menu displays.

2. Enter the current lock codes. To ﬁ nd the current lock codes, follow the instructions under “Conﬁ guration and Thermostat Lock”.

3. Press to enter new lock codes.

4. Enter new lock codes.

5. Press . The Lock Codes have been updated.

Upon subsequent power ups, new lock codes will display.

5.7 Conﬁ guration mode

The conﬁ guration mode is used to set the thermostat to match your heating/cooling system. The thermostat functions with heat pump, air conditioning, gas, oil, or electric heat systems. To conﬁ gure the thermostat, perform the following steps:

1. Press , then press repeatedly until is selected.

5.8 Conﬁ guration Mode Settings

The setup screens for Conﬁ guration Mode are as follows:

 Temperature Scale

— Choose Fahrenheit or Celsius.

— Press the or to select.

— Press to advance to the next screen.

Figure 5

 1st Stage Temperature Differential

— Set the number of degrees between your “setpoint” temperature and

your “turn on” temperature.

— Press the or to set differential value.

— Press to advance to the next screen.

(F or C)

CONFIG

(1°F to 5°F) (0.5°C to 2.5°C)

2. Press to advance from one screen to the next.

Pressing will return you to the previous screen.

3. Press the or to change settings within each screen. Changes are saved automatically.

4. To exit conﬁ guration mode, press . Auto exit occurs after two minutes with no icons touched.

CONFIG

Figure 6

 2nd Stage Temperature Differential

(1°F to 5°F) (0.5°C to 2.5°C)

— Set the number of degrees between when stage 1 turns on and when

stage 2 turns on.

— Press the or to set differential value.

— Press to advance to the next screen.

CONFIG

Figure 7

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Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

 3rd Stage Temperature Differential

(1°F to 5°F) (0.5°C to 2.5°C)

— Set the number of degrees between when stage 2 turns on and when

stage 3 turns on.

— Press the

or to set differential value.

— Press to advance to the next screen.

CONFIG

Figure 8

 Staged Off Outputs

— Select whether the outputs for heating and cooling are staged off

independently or are satisfied simultaneously.

— = Outputs off simultaneously (best for dual fuel). =

Outputs staged off independently.

For 2 compressor heat pumps and multi-stage gas/oil systems, stage 3 is

staged off independently when SO is set to .

 Heat Source:

WARNING:

 Incorrect settings can damage system and/or cause

Non-Heat Pump

Electric

CONFIG

Figure 11

Heat Pump

Heat Pump with 2 stage or 2 compressors and Heat Active Reversing Valve

There are six heat source settings:

potentially dangerous conditions. Use the code described in Configuration and Thermostat Lock.

Gas

CONFIG

Heat Pump with 2 stage or 2 compressors and Cool Active Reversing Valve

— Press the or to set.

— Press to advance to the next screen.

CONFIG

Figure 9

 Minimum Deadband

(1°F to 9°F) (1°C to 5°C)

— Set the minimum separation between heat setpoint and cool setpoint

in Auto Changeover Mode.

— Press the or to set deadband value.

— Press to advance to the next screen.

CONFIG

Heat Pump with 1 compressor single stage and Heat Active Reversing Valve

CONFIG

Figure 12

CONFIG

Heat Pump with 1 compressor single stage and Cool Active Reversing Valve

CONFIG

Figure 10

Data subject to change

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 Auxiliary Delay

ON (0-60 minutes)

— Set the delay time in minutes for auxiliary heat to be locked out after a

call for second stage. This extra savings feature is used to temporarily lock out auxiliary heat devices, allowing just heat pump to try to satisfy heat call.

— Press the

or to select. Press to advance to the next

screen.

HEAT

CONFIG

Figure 13

 Lockout

(0-8°, SLEEP, COOL-HEAT)

— Select the number of degrees set temperature can be changed during

keypad lockout.

SLEEP

setting locks thermostat only during the sleep

period to prevent after hours tampering.

COOL-HEAT

lockout allows adjustment of the set temperatures to the maximum heat set temperature selected and minimum cool set temperature selected.

 Minimum Cool Setpoint

(45°F to 90°F) (7°C to 32°C)

— Adjust to control the minimum cool set temperature allowed.

— Press the

or to select. Press to advance to the next

screen.

CONFIG

COOL

Figure 16

 Vacation Cooling Setpoint

— These work in conjunction with the Schedule mode where you set the

date and time of your RETURN from vacation.

— Until that date/time, system will remain at the cooling setpoint

specified here.

— Press the or to select. Press to advance to the next

screen.

The mode cannot be changed while the thermostat is locked.

Press the or to select. Press to advance to the next screen.

CONFIG

Figure 14

 Maximum Heat Setpoint

(45°F to 90°F) (7°C to 32°C)

— Adjust to control the maximum heat set temperature allowed.

— Press the or to select. Press to advance to the next

screen.

VACATION

CONFIG

COOL

Figure 17

 Vacation Heating Setpoint

— These work in conjunction with the Schedule mode where you set the

date and time of your RETURN from vacation.

— Until that date/time, system will remain at the heating setpoint

specified here.

— Press the or to select. Press to advance to the next

screen.

VACATION

HEAT

CONFIG

HEAT

CONFIG

Figure 15

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Figure 18

Data subject to change

Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

 Room Temperature Offset

(+9°F to -9°F) (+4.5°C to -4.5°C)

— Adjust to calibrate displayed room temperature to match actual room

temperature.

— Press the

or to select. Press to advance to the next

screen.

CONFIG

Figure 19

 Maximum Cycles Allowed Per Hour

(- -, 2-6)

— = as many as needed, 2-6 = maximum cycles/hour

— Press the or to select. Press to advance to the next

screen.

 Hourly Cycle Fan Operation

(1-30 minutes per hour)

— Used in conjunction with the Fan HOURLY mode. When the user

selects this option, the fan will turn on at the beginning of every hour and run for the number of minutes indicated here.

— Press

or to select.

— Press to advance to the next screen.

HOURLY

CONFIG

Figure 22

 Fan on Schedule

(OFF, WAKE, LEAVE, RETURN, SLEEP)

— The fan will run continuously during this scheduled period when the

mode is not set to OFF. To turn on the fan during one of the scheduled periods (WAKE, LEAVE, RETURN, SLEEP), please do the following:

— Press or to select.

— Press to advance to the next screen.

CONFIG

Figure 20

 Fan Delay Off Time

(0, 30, 60, 90 seconds)

— Select the amount of time the fan continues to operate after the cool/

heat demand has been satisfied. Functions for cooling, heat pumps and electric heat.

— Press or to select.

— Press to advance to the next screen.

CONFIG

Figure 21

SCHEDULEFAN

OFF

CONFIG

Figure 23

 Check Filter Timer

(800-2500 hours)

— After the number of (fan running) hours specified, (for example,

1200 hours), the words “CHECK FILTER” will display to remind you to check/change the system filter. The next configuration screen is where the elapsed number of run hours can be reset.

— Press or to select.

— Press to advance to the next screen.

Check Filter

CONFIG

Data subject to change

Figure 24

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 Reset Check Filter Timer

— Used to reset the elapsed number of (fan running) hours for the Check

Filter Timer

— Press

or to select (YES).

— Press to advance to the next screen or press to exit

configuration setting mode. Auto exit occurs after two minutes of no icons being touched.

RESET Check Filter

CONFIG

Figure 25

6 Mode of operation

BC7801 is based on the i3020R, but adds connections to the UPM to read UPM fault codes. It saves fault code history and displays a new message on the front panel of the thermostat to alert the user to call a service technician to service the system.

The thermostat is a programmable, manual or auto changeover, up to 3-stage heat and up to 2-stage cool thermostat. It functions with air conditioning, heat pumps, gas, oil, or electric heat systems. The thermostat activates the heating appliance when the room temperature is below the set heat temperature (by the diﬀ erential temperature). When the call for heat has been satisﬁ ed, the outputs are turned oﬀ . With heat pumps, the thermostat will not let the compressor come on for 4 minutes after it turns oﬀ to protect your compressor.

When the room temperature is greater than the set cool temperature (by the diﬀ erential temperature), the cooling device is activated. When the call for cooling has been satisﬁ ed, the outputs are turned oﬀ . The thermostat will not let the compressor come on for 4 minutes after it turns oﬀ to protect your compressor.

The program schedule can be overridden by changing the set temperature (

). This puts the thermostat into a temporary hold. It will automatically return to

the program schedule depending on how the override feature is conﬁ gured.

6.1 Icon Functions

– Used to increase the time, set temperatures, and to adjust

conﬁ guration settings.

SERVICE

DOWN

– Used to decrease the time, set temperatures, and to adjust

conﬁ guration settings.

– Used to enter conﬁ guration, set the clock, lock the thermostat,

or select viewing options.

— CONFIG Sets up thermostat to work for specific

systems.

— CLOCK Set year, month, date, and time.

— LOCK Allows you to lock the thermostat to prevent

tampering.

— VIEW Allows you to see both the remote sensor

temperatures, date, current schedule period, lock screen, filter accumulated time, and show details (system status).

FAN

– Used to select between AUTO, ON, and HOURLY fan operation.

MODE

–

Used to select between OFF, HEAT, EMERGENCY HEAT (heat pump only), COOL, and AUTO changeover modes.

HOME

– Wakes thermostat, returns to home screen, and enters changes

into memory.

SCHEDULE

– Used to edit program schedule, turn program on and oﬀ ,

and set vacation return dates.

CALL

TECH

CALL SERVICE TECH

– Message appears when the thermostat senses a

lockout condition occured on the UPM.

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CHECK FILTER

– Message appears when the blower motor set runtime

has been met. Indicates the air ﬁ lter should be checked, cleaned, or changed.

Data subject to change

Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

6.2 Operating Modes

The possible operating modes for the thermostat are: OFF, HEAT, EM HEAT, COOL, and AUTO. Use to select.

 OFF Mode

— In this mode, the thermostat will not turn on the heating or cooling

devices

The indoor fan can be turned on manually in every operating mode by

pressing until displays. The fan icon appears on the display when the fan operates.

MODE

OFF

Figure 26

 Heat Mode

— In this mode, the thermostat controls the heating system. When the

heat outputs, the flame icon appears on the display for each stage of heat that is on.

 Cool Mode

— In this mode, the thermostat controls the cooling system. When the

cooling outputs, the snowflake

icon appears on the display for

each stage of cool that is on.

There is a four minute delay for your compressor to restart after it has

turned oﬀ . To bypass the compressor time delay, go to OFF mode and press .

MODE

COOL

Figure 29

 Auto Mode

— In this mode, the thermostat controls both heating and cooling

systems simultaneously.

MODE AUTO

For heat pumps, there is a four minute delay for your compressor to restart

after it has turned oﬀ . To bypass the compressor time delay, go to OFF mode and press .

MODE

HEAT

Figure 27

 EM Heat Mode

— In this mode, the compressor is bypassed and emergency heat is

used.

This mode is only used with heat pumps.

MODE

HEAT

COOL

Figure 30

HEAT

Figure 28

Data subject to change

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6.3 Testing the Thermostat

Once the thermostat is conﬁ gured, it should be thoroughly tested.

CAUTION:

 Do not energize the air conditioning system when the outdoor

temperature is below 50 degrees. It can result in equipment damage or personal injury.

Heat Test

1. Press , then press until heat mode is displayed.

2. Adjust the set temperature so it is 5 degrees above the room temperature.

3. Heating should come on within a few seconds.

4. Adjust the set temperature 2 degrees below the room temperature and the heat should turn oﬀ . There may be a fan delay on your system.

For heat pumps, there is a four-minute delay to protect your compressor

after it turns oﬀ . To bypass the compressor time delay, go to OFF mode and press .

6.4 Setting the Time and Date

1. Press , then press until CLOCK is displayed.

2. Press to enter date/time setting. Year blinks.

3. Press or to select the year.

4. Press to save value and move to month.

5. Press or to select the month.

6. Press to save value and move to day.

7. Press or to select the day.

8. Press to save value and move to hour.

9. Press or to select the hour.

As you move past 12:00, the AM/PM symbol will change automatically.

10. Press to save the value and move to minutes.

11. Press or to select the minutes.

Cool Test

1. Press , then press until cool mode is displayed.

2. Adjust set temperature so it is 5 degrees below room temperature.

3. Cooling should come on within a few seconds.

4. Adjust the set temperature 2 degrees above the room temperature and the cooling should turn oﬀ . There may be a fan delay on your system.

There is a four-minute time delay to protect the compressor after it turns

oﬀ . To bypass the compressor time delay, go to OFF mode and press ..

Fan Test

1. Press , then press icon. displays. Indoor fan turns ON.

2. Press , then press icon. displays. Indoor fan turns OFF.

12. Press to exit Time/Date setting.

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Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

6.5 Setting the program schedule

The thermostat has four periods (WAKE, LEAVE, RETURN, SLEEP) that are customizable for each day of the week. Each period will have a start time, heat temperature, and cool temperature. The thermostat monitors the day and time, while maintaining the speciﬁ c conditions you have chosen for each period in your program.

Setting the program schedule:

1. Press , then press until EDIT is displayed.

2. Press to enter Program Schedule.

3. The day of the week ﬂ ashes. Use the or to select the day of the week.

You can select the days individually, or if you keep going, there is an option

for MON-FRI, MON-SUN or SAT-SUN.

4. Press to continue.

5. The period (WAKE, LEAVE, RETURN, SLEEP) begins ﬂ ashing. Use the or to select the desired period.

6. Press to continue.

7. Hour ﬂ ashes. Use the or to select the hour when you want the current

period to begin.

6.6 View screen options

1. Press , then press repeatedly until the option displays then press .

2. Press to advance to the next screen.

3. Press to go to previous screen.

These screens are visible when the thermostat is locked or unlocked.

View fault Screen

Month

Day

VIEW

Figure 31

8. Press to continue.

9. The minutes ﬂ ash. Use the or to select the minutes when you want the current period to begin.

10. Press to continue.

11. The HEAT temperature ﬂ ashes. Use the or to set the desired heat temperature.

12. Press to continue.

13. The COOL temperature ﬂ ashes. Use the or to set the desired cool temperature.

14. Press to continue.

15. Continue to set your entire schedule.

16. Press to exit.

View month, day, and year

Year

VIEW

Figure 32

View program schedule settings

— OFF

shows when schedule is off.

— SETTINGS

show when schedule is on.

Mon

VIEW

Figure 33

Month

Day

SCHEDULE

SLEEP

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View if locked or unlocked

— = Unlocked

—

= Locked

VIEW

Figure 34

View ﬁ lter status

— Accumulated fan run time displays.

VIEW

Figure 35

Display setpoints, fan, and program information

— Press or to select.

= Don’t display setpoints and program schedule information.

= Always display setpoints and program schedule information.

6.7 Viewing fault codes

When one of the faults listed below causes a hard lockout on the UPM the unit compressors are disabled and the “Call Service Tech” light is illuminated.

To view UPM’s fault code, go to . Press multiple times to the last menu item.

If no fault history is recorded, screen will show “VIEW Er no”.

VIEW

Figure 37

If fault history is recorded, screen will show “VIEW E{x} {month} {date} {time}” indicating the fault code, date and time of the fault.

Month

Day

VIEW

Figure 38

You can press or button to browse fault history. The thermostat records the latest 20 faults.

— Press to exit.

Figure 36

VIEW

SLEEP

Code Fault Fault Condition

1 HPC High Pressure Switch lockout

2 LPC Low Pressure Switch lockout

3 FRE1 Freeze sensor 1 lockout

4 CON Condensate lockout

6 FRE2 Freeze sensor 2 lockout

Table 3

The fault codes listed in Table 3 are not representative of all units /

models. Please refer to the unit instruction and maintenance manual for additional information.

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Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

6.8 Schedule override

The schedule override feature allows the user to override the program schedule for 1 to 5 hours. In addition, if selected, the schedule can be overridden only until the next transition period.

To access the Schedule override feature, enter the CONFIG screen by pressing the menu button. Then, use to scroll through the menu options until you reach the SCHEDULE OVERRIDE screen. In the default setting, the Vacation & Schedule periods will be ﬂ ashing in the upper right corner of the LCD. In this mode, the Vacation & Schedule will be overridden until the next transition period. To switch to the 1-5 hour override, use the arrow. This mode allows the user to override the Schedule set points for 1-5 hours.

Figure 39

6.9 Setting the vacation timer

The vacation timer lets you set the date and time of your RETURN from vacation. Until that date/time, the system will remain at the VACATION heating and cooling setpoints speciﬁ ed in the conﬁ guration menu.

To use the EASY VACATION feature:

Press , then press the to scroll to “Vacation” then press again. The thermostat will automatically go into Vacation mode with the default return date 1 month later .

To set the vacation timer (and begin vacation setpoint mode):

1. Press to select operating mode.

2. Press , then press until VACATION appears.

3. Press to enter the date and time you plan to RETURN from vacation.

4. When your ﬁ nished entering the date/time, press .

Data subject to change

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7 Factory preprogramming

The thermostat comes pre-programmed with the following schedule:

MONDAY thru SUNDAY

WAKE 6:00 AM LEAVE 8:00 AM RETURN 6:00 PM SLEEP 10:00 PM

HEAT 70°F HEAT 62°F HEAT 70°F HEAT 62°F

COOL 78°F COOL 85°F COOL 78°F COOL 82°F

Use the following personal program schedule to record your settings:

MONDAY - 1

WAKE LEAVE RETURN 6:00 PM SLEEP

HEAT HEAT HEAT HEAT

COOL COOL COOL COOL

TUESDAY - 2

WAKE LEAVE RETURN 6:00 PM SLEEP

HEAT HEAT HEAT HEAT

COOL COOL COOL COOL

WEDNESDAY - 3

WAKE LEAVE RETURN 6:00 PM SLEEP

HEAT HEAT HEAT HEAT

COOL COOL COOL COOL

THURSDAY - 4

WAKE LEAVE RETURN 6:00 PM SLEEP

HEAT HEAT HEAT HEAT

COOL COOL COOL COOL

FRIDAY - 5

WAKE LEAVE RETURN 6:00 PM SLEEP

HEAT HEAT HEAT HEAT

COOL COOL COOL COOL

SATURDAY - 6

WAKE LEAVE RETURN 6:00 PM SLEEP

HEAT HEAT HEAT HEAT

COOL COOL COOL COOL

SUNDAY - 7

WAKE LEAVE RETURN 6:00 PM SLEEP

HEAT HEAT HEAT HEAT

COOL COOL COOL COOL

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Data subject to change

Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

8 Troubleshooting

Symptom Solution

No display

System fan does not come on properly Verify wiring is correct, check heat source (Gas/Electric) in Conﬁ guration (see Section 5).

No response with ﬁ rst button press

Program schedule activates at wrong time Check time (AM/PM) set on thermostat (see Setting the Time and Date).

Thermostat turns on/oﬀ too frequently Adjust temperature diﬀ erential (see Conﬁ guration Mode Setting, Section 5.8).

Thermostat does not follow program

Fan runs continuously

Room temperature is not correct Calibrate thermostat (see Conﬁ guration Mode Setting).

LOCK

displays when any button is pressed

Heat or Cool not coming on Verify wiring is correct, gently pull on each wire to verify there is a good connection at terminal block.

Check for 24 VAC at thermostat; display is blank when 24 VAC is not present. Time and day of week must be reset after power loss with no batteries installed.

Press

to activate touch icons.

Verify the schedule is on

Press

and set to auto . is continuous run.

Thermostat has the button lockout function activated (see Lockout & Unlock Feature) and (see Conﬁ guration Mode Setting, Section 5.8).

: check time (AM/PM); check if in program override.

displays

Setpoints do not display all of the time

OVERRIDE

displays

Table 4

Check for low battery condition or faulty outdoor/remote temperature sensor.

Press ,

Program schedule is in temporary override, it will return to schedule at the next transition time.

, six times,

VIEW

Data subject to change

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NOTES:

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Data subject to change

Bosch 3H/2C Touch-Technology Thermostat Installation, Operation & Application Manual

Data subject to change

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Installation, Operation & Application Manual Bosch 3H/2C Touch-TechnologyThermostat | 23

Bosch Thermotechnology Corp. | 08.2016

Data subject to change

United States and Canada

Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053

Tel: 866-305-9974 Fax: 603-965-7581 www.boschheatingandcooling.com

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