Bosch 7736504945 User manual

6 720 813 643 (2019/03) US
Installation Instructions
Bosch Remote Control
7736504945 [with Wi-Fi]
7736504946 [without Wi-Fi]

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Contents
Bosch Remote Control – 6 720 813 643 (2019/03)
Contents
2 Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1 Explanation of symbols and safety instructions . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Guideline to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Remote control Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Declaration of conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.2 Scope of delivery, 7736504945 with Wi-Fi. . . . . . . . . . . . . . . . . . . . . . . .7
3.3 Scope of delivery, 7736504946 without Wi-Fi . . . . . . . . . . . . . . . . . . . . . 8
4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
5 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.1 Proper location for installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.2 Mounting the remote control on the wall. . . . . . . . . . . . . . . . . . . . . . . . . .11
5.2.1 Power connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.1 Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
6.2 Temperature selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
6.2.1 Programming the default setpoint temperature. . . . . . . . . . . . . . . . . . . .20
6.3 Main menu structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
6.4 Information /Adjustments menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
6.4.1 “P4” - Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
6.4.2 SA - Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.4.3 AU - Technical Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
6.4.4 “P9” - Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
6.5 Service menu - AU Technical Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

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Contents
Bosch Remote Control – 6 720 813 643 (2019/03)
6.6 Factory default settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.7 Water actuators calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.7.1 MF main valve auto calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.7.2 BP bypass valve auto calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.1 Error codes diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.2 Remote control doesn’t turn on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.3 Error symbol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
9 FCC Regulatory notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Explanation of symbols and safety instructions
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1 Explanation of symbols and safety instructions
1.1 Guideline to symbols
Warnings
CAUTION:
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.
Additional symbols
Table 1 Additional symbols
Symbol Function
▶ Sequence of steps
Cross-reference to other points in this document or to other documents
• Listing/list entry
– Listing/list entry (2nd level)

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Bosch Remote Control – 6 720 813 643 (2019/03)
Explanation of symbols and safety instructions
1.2 Safety instructions
These installation instructions are intended for technicians trained and experienced
dealing with HVAC systems.
▶ Read the installation instructions before starting the installation.
▶ Observe safety instructions and warnings.
▶ Observe national and regional regulations, technical rules and guidelines.
▶ Document all work performed.
Designated use
▶ Use the product only to control heating systems in single- or multi-family
dwellings.
Any other use is considered improper. Any resulting damage is excluded from the
manufacturer's warranty.
Installation, commissioning and maintenance
Installation, commissioning and maintenance may be performed only by a licensed
contractor.
▶ Never install the product in wet areas.
▶ Use only original Bosch spare parts.
Electric work
▶ Ensure that only an authorized contractor performs electrical work.
▶ Before performing electrical work, disconnect the power and secure the unit
against unintentional reconnection.
▶ Ensure the system has been disconnected from the power supply.
Risk of damage from frost
The system can freeze if it is switched off:
▶ Observe the instructions for freezing protection.
▶ Always leave the system switched on for additional functions.
▶ Immediately correct any faults that occur.

Safety instructions
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2 Safety instructions
▶ Read the following instructions carefully to ensure correct operation.
▶ Follow safety instructions.
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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Bosch Remote Control – 6 720 813 643 (2019/03)
Remote control Kit
3 Remote control Kit
3.1 Declaration of conformity
The Wi-Fi module complies with the requirements of the Radio Equipment Directive
(2014/53/EU) and is authorized under FCC rules, 47 CFR Part2.
3.2 Scope of delivery, 7736504945 with Wi-Fi
Fig. 1 Scope of delivery
[1] Remote control
[2] Communication cable
[3] Screws
[4] Installation instructions
[5] Data login sticker

Remote control Kit
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3.3 Scope of delivery, 7736504946 without Wi-Fi
Fig. 2 Scope of delivery
[1] Remote control
[2] Communication cable
[3] Screws
[4] Installation instructions

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Bosch Remote Control – 6 720 813 643 (2019/03)
Technical data
4 Technical data
Fig. 3 Dimensions
Only connect the remote control to approved Bosch water heaters.

Installation
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5 Installation
5.1 Proper location for installation
DANGER:
Risk of scalding!
▶ Carefully select the location of the remote control to avoid accidental water
temperature settings.
Before installing the remote control (only for 7736504945 with Wi-Fi),
▶ Check the Wi-Fi signal reception in the mounting vicinity.
If there is no Wi-Fi signal at the location of installation,
▶ Use a AP (Access Point) to increase Wi-Fi signal.
NOTICE:
Risk of damaging the remote control!
Humidity will damage the remote control.
▶ Do not install the remote control in rooms with a high moisture level (e.g.
bathrooms, saunas).

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Bosch Remote Control – 6 720 813 643 (2019/03)
Installation
5.2 Mounting the remote control on the wall
▶ Carefully open the remote control with a screw driver.
Fig. 4 Open remote control
NOTICE:
Risk of damage the remote control internal components!
Electrostatic discharge can damage internal components.
▶ Do not touch on the internal components.
▶ Run the communication cable from the water heater to the mounting location.
▶ The communication cable can be either run inside the wall or outside the wall.

Installation
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▶ Using the protruding cable as the center point, mark two level holes 2 3/8 inches
apart.
Fig. 5 Wires inside the wall
▶ Remove the remote control interface from the base.
▶ Position the base level on the wall at the desired height.
▶ Mark two level holes within the screw guides in the base.
Fig. 6 Wires outside the wall
▶ Drill 1/4 inch holes in the marked locations.
▶ Insert the two supplied wall expansions.
6720813643-06.2V
2 3/8 in
(60mm)
6720813643-07.1V
2 3/8 in
(60mm)

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Bosch Remote Control – 6 720 813 643 (2019/03)
Installation
▶ Mount the base using the two provided screws.
Fig. 7 Mounting the base
5.2.1 Power connection
Power is supplied to the remote control via supplied communication cable.
▶ Connect the communication cable to the remote control.
Fig. 8 Connection of the remote control
6720813643-02.2V
1/4 in

Installation
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▶ Assemble the remote control interface to the mounted base.
Fig. 9 Assemble the remote control

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Bosch Remote Control – 6 720 813 643 (2019/03)
Installation
▶ Connect the communication cable to the water heater.
Fig. 10 Connection to the water heater

Controls
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6 Controls
Fig. 11 Controls
[1] LCD display
[2] Up button
[3] Down button
[4] On/Off button
[5] Confirmation button
[6] Return button
[7] Burner status / Error symbol
NOTICE:
▶ Wipe down with a damp cloth.
▶ Do not use any aggressive or corrosive cleaning agents to clean the remote
control.

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Bosch Remote Control – 6 720 813 643 (2019/03)
Controls
6.1 Power
To turn ON the appliance;
▶ Touch and hold symbol for more than 3 sec.
The LCD display shows the selected temperature.
When the burner is on, the display shows symbol (Fig. 11, [7]).
Fig. 12
To shut down the appliance;
▶ Touch and hold symbol for more than 3 sec.
6720813761-04.1V

Controls
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6.2 Temperature selection
WARNING:
Risk of scalding!
The temperature shown on the display is device measured.
▶ Always check with your hand before bathing children or elderly.
To select a hot water temperature:
▶ Touch the symbol or until the desired temperature is displayed.
Fig. 13
A lower temperature set point will reduce the risk of scalding, reduce energy
consumption and increase the longevity of the appliance.
Setting the water temperature
The desired temperature of hot water can be adjusted on the remote control.
Setting temperature in the remote control, will update the information in the
appliance front control panel.
The water heater has an electronically controlled gas valve that modulates the burner
input in response to both varying hot water flow rates and/or changes in any incoming
and outgoing water temperatures.
6720813761-05.1V

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Controls
Safety information
Fig. 14

Controls
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6.2.1 Programming the default setpoint temperature
Fig. 15 “Program” key
▶ Touch the symbol or to select the desired temperature.
▶ Hold the “OK” button for 3 seconds to save the default set point temperature.
When the display stops blinking, the default set point temperature is saved in
memory.
Selecting the default setpoint temperature
In order to select the default setpoint temperature
▶ Touch the “OK” button.
Display shows the default setpoint temperature, which is now the hot water selected
setpoint temperature.
6720813761-06.1V