Bosch BMS-WT1 Series User manual

Bosch Wired Wall Thermostat
For use with Bosch Split-Type Ductless Air Conditioner / Heat Pump
User Manual

2 |Bosch Climate 5000 Series Wired Wall Thermostat User Manual
06.2019 |Bosch Thermotechnology Corp.
Data subject to change

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Bosch Thermotechnology Corp. |06.2019 Data subject to change
Table of Contents
1 Key to Symbols and Safety Instructions 4
1.1 Key to Symbols 4
2 Remote Controller Specifications 4
3 Operation of Buttons 5
4 Indicators on LCD 6
5 Installation 7
5.1 Dimensions 7
5.2 Wiring 7
5.3 Remove Front Cover 8
5.4 Mount Back Plate 9
5.5 Battery Installation 9
5.6 Connect to Indoor Unit 9
5.7 Reattach the Cover of the Wired Wall Thermostat 10
5.8 Installation Guide for Wall Mounted Indoor Unit Only 10
6 Operation Guideline 12
6.1 Set Date and Time 12
6.2 Cooling/Heating/Fan Operation 12
6.3 Change Fan Speed 12
6.4 Follow Me Function (Wall Mounted Indoor Unit Only) 13
6.5 Child Lock 13
6.6 Key Pad Tone Setting 13
6.7 °F / °C Selection 13
6.8 Turbo Mode 13
6.9 Decorative Grille Automatic Lift Up/Down (works with 4-Way
Cassette Indoor only) 13
6.10 Swing Function 14
6.11 Scheduling 15
6.12 Copy Existing Schedule 17
6.13 Delete Saved Schedule 18
6.13 Set Timer On or Off Function 19
6.14 Set Timer On and Off Function 19

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06.2019 |Bosch Thermotechnology Corp.
Data subject to change
1 Key to Symbols and Safety Instructions
1.1 Key to Symbols
Warnings
Warnings in this document are identified 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 defined 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.
Important information
This symbol indicates important information where
there is no risk to people or property.
2 Remote Controller Specifications
IDU Type
Wall Mounted Cassette & Ducted
Model Name BMS-WT1-XXX BMS-WT2-XXX
Model # 8733953127 8733953128
Input Voltage DC 5V DC 12V
Environment (ºF / ºC) 23~110 / -5~43
Table 1
Button design is based on a typical model and might be slightly different
from the actual one you purchased, the actual shape shall prevail.
WARNING:
This product can expose you to chemicals including Lead
and Lead components, which are known to the State
of California to cause cancer and birth defects or other
reproductive harm. For more information go to www.
P65Warnings.ca.gov.

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3 Operation of Buttons
Figure 1
2
Swing Timer
Day o/Del
Conrm Back/Turbo
Copy/
Follow me
Mode
Fan speed
(Lock)
-
+
1
4
3
4
5
6
7
10
9
8
1. ON/OFF: Press this button to turn the system ON or OFF.
2. MODE: Change mode of operation.
AUTO COOL DRY HEAT FAN
3. FAN: Change fan speed.
AUTO LOW MED HIGH
You can not switch the fan speed in AUTO or DRY mode
4. ADJUST: Used to adjust setting.
5. SWING: Adjust louver angle (Wall Mounted and Cassette type indoors only).
6. TIMER: Set up On/Off Timer, 7-Day schedule.
7. DAY OFF/DEL: Used to skip day during 7-Day scheduling or delete saved set up.
8. CONFIRM: Used to save setting change.
9. BACK/TURBO: To go back to previous page or select Turbo mode.
10. COPY/FOLLOW ME: Copy the setting or activate Follow Me function.

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4 Indicators on LCD
Figure 2
12 37 9
15
14
17
18
19
10
4
5
6
813 11 12
16
20
No. Icon Description
1 Auto Operation Mode: Auto
2 Cool Operation Mode: Cool
3 Dry Operation Mode: Dry
4 Heat Operation Mode: Heat
5 Fan Operation Mode: Fan
6 Off Operation Mode: Off
7 Fan Swing Fan Swing Indicator: Left-Right (Not applicable)
8 Fan Swing Fan Swing Indicator: Up-Down
9 Faceplate Decorative Grille Automatic Lift Function (optional accessory required)
10 A & B Unavailable function in N.A.
11 Follow Me Follow Me Function Indicator
12 Turbo Turbo Mode On Indicator
13 Fan Speed Fan Speed Indicator (Lo-Med-Hi-Auto)
14 Temperature Temperature Display
15 Unit ºC / ºF Indicator
16 Lock Child Lock Indicator
17 Room Temperature Room Temperature Indicator
18 7-Day Schedule Schedule Function Indicator
19 On / Off On / Off Timer Display
20 Clock Clock Display
Table 2

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5 Installation
5.1 Dimensions
Figure 3
4.8in
(123mm)
4.7in (120mm) 0.7in
(18.5mm)
3.3in
(83.5mm)
1.8in
(46mm)
2.4in (62mm)
5.2 Wiring
Figure 4
red
black
yellow
brown
red
black
yellow
brown
Insert of the
mainboard CN40
Wire controller Indoor unit mainboard
4-Core Shielded Cable
The length is decided by installation
-----------------------------------
-----------------------------------
-----------------------------------
-----------------------------------
For Wall Mounted Indoor Units
Install the Adapter Board and the Display Board on the Wall Mounted indoor unit.
Figure 5
Model: BMS-WT1-XXX (8733953127)
Adapter board
Display board
4-core shielding wire
The connection
cable
CN101

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06.2019 |Bosch Thermotechnology Corp.
Data subject to change
For 4-Way Cassette and Concealed Ducted Indoor Units
Figure 6
Mainboard
4-core shielding wire
Model: BMS-WT2-XXX (8733953128)
Connection cable
CN40
Do not install the wired wall thermostat where it can be affected by:
Direct hot or cold air from ducts
Drafts or dead spots behind doors and corners
Direct sun light contact area
5.3 Remove Front Cover
1. Insert a screwdriver into the slots in the lower part of the wired wall
thermostat (2 places).
Slots
2. Remove the front cover.
The PCB is mounted in the upper part of the wired controller. Be careful
not to damage the board with the screwdriver.

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5.4 Mount Back Plate
1. For surface mounting, install back plate on the wall with the 3 screws
(M4x20) and plugs.
Figure 7
Back plate
Screws (M4×20)
2. For switch box mounting, install the back plate on the switch box with 2
screws (M4x25) and fasten it on the wall with 1 screw (M4x20).
Figure 8
Switch box
Back plate
Screw (M4×20)
Screws (M4×25)
Place on a flat surface. Over-tightening screws may damage back plate of
the wired wall thermostat.
5.5 Battery Installation
1. Place the battery in the unit and ensure the positive side of the battery is in
accordance with the polarity markings.
Figure 9
2. Set the correct time before operating. Batteries in the wired controller
can maintain the correct time during a power failure. When the power is
restored and the displayed time is not correct, replace the battery.
5.6 Connect to Indoor Unit
There are three methods:
Method 1: from back
Figure 10
PCB
1
Method 2: from bottom
Figure 11
PCB
Method 3: from top
Figure 12
PCB
1
Knock-out the part for the wiring to pass through with a nipper tool.

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06.2019 |Bosch Thermotechnology Corp.
Data subject to change
DO NOT allow water to enter the wired wall thermostat.
Use the trap and putty to seal the wires.
Figure 13
Putty
Putty
Putty
Trap
Trap Trap
5.7 Reattach the Cover of the Wired Wall Thermostat
1. Avoid clamping during installation.
Figure 14
5.8 Installation Guide for Wall Mounted Indoor Unit Only
1. Open the front panel of the Wall Mounted Indoor Unit
Figure 15
2. Disconnect the wire from the main control board.
Figure 16
3. Identify the components. From left to right,display board and adapter
board.
Figure 17

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4. Open adapter board's cover, connect 4 pin cable (red end) with CN403
from the board and close the cover.
Figure 18
5. Before mounting back on the front panel, remove the display board’s screen
cover.
Figure 19
6. Connect 4 pin (black) to Wired Wall Thermostat.
Figure 20
7. Connect 8 pin connector from the display board to the IDU.
Figure 21
8. Place display & adapter board on the back of the front panel and close the
cover of IDU control box.
Figure 22

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6 Operation Guideline
6.1 Set Date and Time
1. Press TIMER for 3s or more. The timer will flash.
Figure 23
Timer
2. Press + or − to set the date. The selected date flashes.
Figure 24
-+
3. Date setting is complete and the time setting is ready after pressing TIMER.
Figure 25
Timer
4. Press + or − to set the current time. Press repeatedly to adjust the current
time in 1 minute increments.
Figure 26
ex.Monday 11:20
-+
5. The setting is complete after pressing TIMER.
Figure 27
Timer
6.2 Cooling/Heating/Fan Operation
Ensure the unit is plugged in and power is available.
1. Press the power button.
Figure 28
2. Press Mode to change / select desired operation mode.
Figure 29
Mode
3. Press + or - to set desired temperature.
Figure 30
Lower Raise
-
+
In the FAN mode, the setting temperature is not displayed on the wired
wall thermostat and you are not able to control the room temperature.
6.3 Change Fan Speed
1. Press Fan Speed to select desired fan speed or auto speed mode.
Figure 31
Fan speed
(Lock)
Fan speed cannot be changed in Dry and Auto mode.

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6.4 Follow Me Function (Wall Mounted Indoor Unit Only)
By default, room temperature will be measured from the sensor in indoor unit.
Follow me function can be activated in order detect room temperature from the
wired wall thermostat rather than the indoor unit for better comfort.
1. Press Copy/Follow me to activate the function.
Figure 32
Copy/
Follow me
2. Follow me picture shows up on display.
Figure 33
By default, Follow me function in the wired thermostat will be turned on
with 4-Way Cassette and Ducted Indoor models.
6.5 Child Lock
1. Press LOCK for 3 seconds to activate the CHILD LOCK.
Figure 34
Fan speed
(Lock)
2. Press again for 3 seconds to deactivate.
6.6 Key Pad Tone Setting
1. Press Swing and Timer simultaneously for 3 seconds to disable the key pad
tone.
Figure 35
Swing Timer
2. Press both buttons again for 3 seconds to enable the key pad tone.
6.7 °F / °C Selection
1. Press Back/Turbo and Timer simultaneously for 3 seconds to change
between °F and °C.
Figure 36
Back/Turbo
Copy/
Follow me
°C °F
6.8 Turbo Mode
1. Press Back/Turbo to activate Turbo mode. Fan speed setting will be changed
to the highest level to satisfy users' set temperature in the shortest time.
Figure 37
Back/Turbo
6.9 Decorative Grille Automatic Lift Up/Down (works with 4-Way
Cassette Indoor only)
1. Turn off the system by pressing the Power button.
Figure 38

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2. Press and hold the Mode button to activate the automatic lift function. The
faceplate icon will flash. F2 will be shown on the display when the grille can
be adjusted.
Figure 39
3. Press + or - to control the lift up and down functions of the grille. While grille
lifts down, press + to stop. While grille lifts up, press - to stop.
Figure 40
Lower Raise
-
+
6.10 Swing Function
Louver Up-Down (applicable to Wall mounted and Cassette Indoor models only)
1. The louver swings by six degrees every time when the Swing button is
pressed.
2. Press and hold Swing for 2 seconds to activate auto swing mode. Press
Swing again to deactivate.
Swing
3. When the auto swing mode is activated, the fan swing icon will appear on
the display.
Figure 41

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6.11 Scheduling
7-day schedule
― Daily schedule can be set
On timer
― Operation starts after the set time
Off timer
― Operation stops after the set time
On and Off timer
― Operation starts and stops after the set time
6.11.1 Programming 7-day Schedule
1. Press Timer to select the Week and press Confirm.
Figure 42
Timer
Conrm
2. Press + or − to select the day of the week and then press CONFIRM.
Figure 43
-+
Conrm
3. Press + and − to select the set time. The set time, mode, temperature and
fan speed appear on the display. Press CONFIRM to enter the setting time
process.
Figure 44
-+
Conrm
Up to 8 scheduled events can be set on one day.
Figure 45
ex.Tuesday schedule 1
4. Press + and − to set the time then press CONFIRM.
Figure 46
-+
Conrm
5. Press + and − to set the operation mode then press CONFIRM.
Figure 47
-+
Conrm

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6. Press + and − to set the room temperature then press CONFIRM.
Figure 48
-+
Conrm
This setting is unavailable in the FAN or OFF modes.
7. Press + and − to set the fan speed then press CONFIRM.
Figure 49
-+
Conrm
This setting is unavailable in the AUTO, DRY or OFF modes.
8. Different schedules can be programmed by repeating steps 3 through 7.
6.11.2 Starting Saved 7-Day Schedule
To Start:
Press Timer to select the , and then the timer starts automatically.
Figure 50
Timer
To Cancel:
Press Power to cancel the timer mode.
Figure 51
The timer mode can also be canceled by changing the timer mode using Timer.
Figure 52
Timer

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6.11.3 Set Day Off (Holiday)
1. After starting the 7-Day schedule, press CONFIRM.
2. Press + or − to select the day of the week.
Figure 53
-+
Conrm
3. Press DAY OFF (holiday) to create an off day (holiday).
Figure 54
The mark is hidden
Day o/Del
ex.The DAY OFF (holiday) is set for Wednesday
4. Set the DAY OFF (holiday) for other days by repeating the steps 2 and 3.
5. Press BACK to revert to the weekly timer.
Figure 55
Back/Turbo
6. To cancel, follow the same procedures used for setup.
The DAY OFF (holiday) setting is cancelled automatically after the set
day has passed.
6.12 Copy Existing Schedule
A saved schedule, can be copied to another day of the week.
1. After starting the 7-Day schedule, press CONFIRM.
2. Press + or − to select the day of the week.
Figure 56
-+
Conrm
3. Press COPY, the letters CY appear on the display.
Figure 57
Copy/
Follow me
4. Press + or − to select the day to copy to.
5. Press COPY to confirm.
Figure 58
Copy/
Follow me
ex. Copy the setting of Monday to Wednesday
The mark
flashes quickly
-+
6. Other days can be copied by repeating steps 4 and 5.
7. Press CONFIRM to save the settings.

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Figure 59
Conrm
8. Press BACK to revert to the 7-Day schedule.
Figure 60
Back/Turbo
6.13 Delete Saved Schedule
1. Activate 7-day schedule and press CONFIRM.
Figure 61
Conrm
2. Press + and − to select the day to delete and then press CONFIRM.
Figure 62
-+
Conrm
3. After selecting the day to be deleted, press Day off/Del to delete the saved
setting.
Figure 63
Day o/Del

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6.13 Set Timer On or Off Function
1. Press Timer to select the or .
Figure 64
Timer
No display
2. Press Confirm and the Clock display flashes.
Figure 65
Conrm
3. Press + or − to set the time. After the time is set, the timer starts or stops
automatically.
Figure 66
-+
ex.Off timer set at 18:00
4. Press Confirm again to finish the settings.
Figure 67
Conrm
6.14 Set Timer On and Off Function
1. Press Timer to select the .
Figure 68
Timer
2. Press Confirm and the Clock display flashes.
Figure 69
Conrm
3. Press + and − to set the On timer and then press CONFIRM.
Figure 70
-+
Conrm
4. Press + or - to set the Off timer.
Figure 71
-+
5. Press Confirm again to finish the setting.
Figure 72
Conrm

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Bosch Thermotechnology Corp.
65 Grove Street
Watertown, MA 02472
Tel: [phone]
Fax: [phone]
www.boschheatingandcooling.com
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