Bosch 250SXO, 2400EO, ESO, 2400E, 250SX User Manual

Bosch Remote Control for

GWH-635-ES/ESO/250SX/250SXO/2400E/2400EO

6 720 606 990 (07.01) JS

Contents

Contents

1 Declaration of conformity FCC 3

2 Remote control data 4

3 Parts supplied 4

4 Using the remote control 4

4.1 Description of the LCD 4

4.2 Remote control transceiver PCB
installation 5

4.3 Remote control activation 7

4.3.1 AF board 7

4.3.2 SU board 8

4.4 Hot water temperature adjustment
by remote control 9

4.5 "Program" button on the remote
control 9

4.6 "Priority" function 10

4.7 Error messages 11

5 Troubleshooting 12

5.1 Replacing batteries 12

5.2 Cleaning 12

5.3 Troubleshooting 12

6Notes 15

2

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Safety instructions

Safety instructions

B Read the following instructions very

carefully to ensure correct
operation.

B Follow safety instructions.

Caution: Any
changes or
modifications not
expressly approved
by the party
responsible for
compliance could
void the user’s
authority to operate
the equipment.

Caution: the remo­te control is
waterproof and can
also be used in the
shower . Ne­vertheless, you
should ensure it is
not immersed in
water, for instance
in the bathtub .

1 Declaration of con-

formity FCC

This device meets the requirements of
FCC Directives.

Caution: The
remote control can
be used only in the
following countries:
United States of
America and
Canada.

This device complies with Part 15 of
the FCC rules. Operation is subject to
the following two conditions: (1) This
device may not cause harmful
interference, and (2) this device must
accept any interference received,
including interference that may cause
undesired operation.

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3

Remote control data

2 Remote control data

Remote control for temperature adjust­ment of Bosch water heaters GWH­635-ES/ESO/250 SX/250SXO/
2400E/2400EO.

Technical Data:

Battery power
supply

Frequency 915 MHz

Type of
protection

Alkaline AA LR 6
2 x 1.5V

IP X6

User range 98 ft (30 m)

Further Indications:

Remote
control

Up to 6 remote controls
can be programmed for
one single appliance..

3 Parts supplied

1 Remote control
2 Remote control transceiver PCB
3 Support block
4 PCB connection cable

4 Using the remote con-

trol

4.1 Description of the LCD

Fig. 2 Multifunctional LCD

1 Displays temperature, error codes

and functions

2 "Remote control in operation"

indication (signal arriving at remote
control)

3 Device in operation (with burner

on)

4 Temperature measurement unit

(possible in °C and °F)

5 Remote control battery level

indication (weak signal coming
from the remote control)

6 Priority function (temperature

cannot be modified by other user
when water is running)

7 "Error code" symbol

Fig. 1 Parts

4

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Using the remote control

4.2 Remote control trans­ceiver PCB installation

Warning: For safe-

ty reasons, discon­nect the power
supply to the water
heater before per­forming installation.

Pre-installation preparation

B Disconnect power supply to heater.
B Remove plastic decals on front

panel.

B Loosen two Philips head screws

located behind plastic decals.

B Lift front cover upward and remove.

Fig. 3

B Remove the 5 screws on the front

retaining bar (see Fig. 3, pos. 1 and

2) being careful not to damage the
foam sealant material on it.

B Remove control unit auxiliary cover

(Fig. 3, pos. 4).

B Remove the two electrical strip

connectors inside the auxiliary cover
(Fig. see diagram below) and then
loosen the 110V power supply cord
retaining nut located underneath the
heater. Once loosened, the power
cord can be pulled up through the
heater to provide sufficient slack.

Once auxiliary cover
is off, pull off the two
electrical strip
connectors from the
board. Once off, the
wiring harness can
be removed from the
case by pulling their
rubber seals
outward.

Fig. 4 Electrical strip connectors

B At the ignition electrodes, pull off the

2 yellow igniter wires that come from
the top of the control board (Fig. 3,
pos. 3). Then pull the complete
control board forward and out of the
heater, pull up the power supply
cord further if more slack is needed.

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5

Using the remote control

B While holding the board in one hand

or resting it on a flat surface, remove
the front cover of the control board
by removing its 4 screws.

Remote control transceiver PCB
installation

B Remove the protective cover (Fig. 5,

pos. 2) from one face of the support
and attach it to the main PCB as
shown in Fig. 6.

Fig. 5

B Remove the other protective cover

and attach the remote control PCB
as shown in Fig. 7.

Fig. 6 Support correct position

B Using the supplied cable connect

between the main PCB and the
remote control PCB as shown in Fig.

7.

Fig. 7

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Using the remote control

B Replace the control unit cover with

the 4 Philips head screws (Fig. 5,
pos. 1).

B Slide control unit back into heater.

B Plug 2 yellow electrode wires from

the top of the control unit back onto
the ignition electrodes (Fig. 3, pos.

3).

Wire polarity does not
matter on the electrode

i

wires.

B Pull end of power cord to take up

excess slack and tighten retaining
nut on the bottom of the heater.

B Reinstall the two electrical strip

connectors onto the PCB. The
larger connector connects to the
lower connection on the PCB.
Reseat the rubber seals for both
connectors.

B Replace the control unit auxiliary

cover. (Fig. 3, pos. 4).

B Replace front retaining bar using 5

Philips head screws. (Fig. 3, pos 1).

4.3 Remote control
activation

Before the remote
control will work, it must

i

be activated using the
procedure described
below with the operator
standing in front of the
appliance.

The remote control initialization
instructions vary based on the version
of control board installed in your
heater.

To determine the control board
version in the water heater:

B Turn power switch on the water

heater to the off position (O).

B When turning power switch to the

on position, note the first two letters
that appear on the display (should
be AF or SU).

B If the letters are AF, follow section

4.3.1. For SU, follow chapter 4.3.2.

4.3.1 AF board

B Connect power to heater.
B Move the power switch on the

appliance to the off position (0).

B On heater control panel press and

hold Program key or

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Using the remote control

while turning on the power switch (I).
Release program key when LCD
displays “188”.

LCD shows “P2”. If not, repeat
previous step.

B Select “P3” using buttons and

on heater.

B Press and hold Program key

or again for 1 sec.

LCD shows one number and one
rotating digit. If not, repeat previous
step.
The number represents the remote
control which is to be registered, the
first remote control will be registered
with number “0”, the second with
number “1” and so on.
The rotating digit shows that the
electronics is expecting a registration.
If the LCD fails to show a number and
rotating digit after repeated attempts,
double check the wire connections
made in section 4.2.

B Hold remote control in front of the

control panel on the heater and
press simultaneously remote control
buttons and until the
temperature indication is shown on
the remote control LCD.

B Switch power switch on the

appliance to the "OFF" (0) position
and then back "ON" (I).

B Press buttons or in order

to reach requested temperature.

New remote control is programmed.

4.3.2 SU board

B Connect power to heater.
B Move the main switch on the

appliance to the "OFF" (0) position.

B Press and hold key while at the

same time turning the main switch to
“ON” position (I).

LCD shows one number and one
rotating digit. If not repeat previous
step.
The number represents the remote
control which is to be registered, the
first remote control will be registered
with number “0”, the second with
number “1” and so on.
The rotating digit shows that the
electronics is expecting a registration.
If the LCD fails to show a number and
rotating digit after repeated attempts,
double check the wire connections
made in section 4.2.

B Hold remote control in front of the

control panel on the heater and
press simultaneously remote control
buttons or until the

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Using the remote control

temperature indication is shown on
the remote control LCD.

B Switch ON/OFF switch to “OFF”

position (0) and then back on (I).

B Press buttons or in order

to reach requested temperature.

New remote control is programmed.

4.4 Hot water temperature
adjustment by remote
control

B Press the buttons or on

the remote control (Fig. 8, pos. 2)
until the required temperature
appears on the remote control
display (Fig. 8, pos. 1).

B When the required temperature is

displayed, turn on the hot water tap.

B The required temperature will flash

on the remote control display.

B The flashing will stop when the

required temperature is reached
(tolerance from selected set point +/

-5°F (+/- 2°C).

4.5 "Program" button on the
remote control

Memorizing the water
temperature with the remote
control "Program" button

B Press the buttons or on

the remote control (Fig. 9, pos. 2), )
until the required temperature
appears on the remote control
display (Fig. 9, pos. 1).

B You will now be able to memorize

this temperature by pressing the
"Program" button on the remote
control (Fig. 9, pos. 3) for 3
seconds.

Note: Previously saved
temperature may show

i

on the display when first
pushing the program
button. Once "PR"
shows on the display,
the desired setting will
be saved.

Fig. 8 Temperature adjustment

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Using the remote control

Fig. 9 Memorizing water

B Only one temperature per remote

B At this point the remote control will

Using the "Program" button
(operation with memorized
temperature)

To operate the equipment with a
previously memorized temperature:

temperature

control can be memorized using the
"Program" button on the remote
control.

display the memorized temperature .
When the hot water tap is turned on,
the water heater will supply hot
water at the temperature memorized
on the remote control.

Up to six addition remote
controls can be used to

i

memorize a temperature
for each remote control.

B Press the "Program" button on the

remote control.

The remote control display and heater
display will now show the previously
memorized temperature. When the hot
water tap is turned on, the water heater
will supply hot water after a few
seconds, at the memorized
temperature.

4.6 "Priority" function

Temperature cannot be
memorized or changed

i

using the heater's
control panel buttons or
a second remote control
when hot water is in use
(e.g. during a shower)
The "Priority" function
will automatically
activate to stop another
user from modifying the
temperature when hot
water is in use.

The remote control does not have a
default temperature setting and
therefore has no default "Priority"
function.The "priority" will be attributed
automatically by the first user who
selects or memorizes (on the remote
control or on the heater’s control
panel) a temperature for subsequent

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Using the remote control

use (e.g. a shower).
Then, when the hot water is used (e.g.
for a shower), the heater's display and
additional remote control displays will
show the symbol " ".
The temperature may only be modified
using the same buttons that
memorized it (depending on whether
the control panel or the remote control
was used). The priority device will not
have the symbol " ".

To clear a device that is locked out with
the " " symbol (with no hot water
running) simply:

B press and hold both the " " and

" " buttons on that device for 5
seconds.

The "Priority" function ends:

• 5 minutes after the last use of the
hot water (return to basic set up).

• 2 minutes after selecting/
memorizing the temperature if no hot
water is used immediately
afterwards.

Acquiring "priority”

Any user can acquire "priority" for
subsequent use of hot water, as
follows:

B Move the heater's main switch to the

on position (I).

B Press and hold "" or "" to

select the desired temperature.

B Press and hold the "Program" but-

ton until the symbol "Pr" appears on
the remote control display.

B Use the hot water within two

minutes of acquiring "priority”.

"Priority" cannot be
acquired while the hot

i

water tap is open.

4.7 Error messages

This device has an error message
system. Any errors that the heater
generates will be indicated by an error
code that will appear on the display
(Fig. 2, pos. 1) and by a symbol
indicating a "safety block" (Fig. 2, pos.

7). The remote control will be operative
only after pressing the reset button on
the heater and clearing the error.
To identify the type of error or if the
error will not clear, consult chapter 6 of
the heater installation manual.

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Troubleshooting

5 Troubleshooting

5.1 Replacing batteries

When batteries are weak, the symbol
(Fig.2, pos. 5) will appear on the
display.

B Remove the two screws on the back

of the remote control.

B Open the battery housing and

remove the batteries, then replace
with new AA LR6 1.5V batteries,
ensuring they are inserted correctly.

Verify that the rubber
seal is correctly fitted

i

between both plastic
housing parts.

B Close the battery housing using the

two screws.

Warning: dead bat-

teries must be
replaced.
Consequently, the
manufacturer is not
liable for any faults or
damage caused by
dead batteries.
Dispose of the dead
batteries properly.

5.2 Cleaning

Use a damp cloth to clean parts of the
remote control. Do not use abrasive or
solvent-based detergents.

5.3 Troubleshooting

1. No display on remote control

B Check for weak or dead batteries

(see section 5.1).

Remote control in sleep mode.

If not used for a few
minutes, the remote's

i

display will go blank to
save batteries.

B simply press any button on the

remote to bring up the display.

2. Remote control will not activate
/ no number with rotating digit

B Ensure that you are standing directly

in front of the water heater when
attempting to activate.

B Ensure that no other device in the

area, such as a cordless phone, is
operating on a frequency similar to
the remote (915 MHz) and causing
interference.

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B Double check all wire connections

made under section 4.2 of the
remote control manual. Pay close
attention to the wire connecting the
remote's PCB to the heater's main
PCB.

3. Remote display shows "- -" only

B Verify the water heater's ON/OFF

switch is turned to the ON (I)
position. If the water heater's display
is still blank, verify the heater is
plugged into a live 120VAC/ 60Htz
properly grounded outlet.

B Verify there is proper voltage to the

water heater (120VAC/60Htz).

B Verify the remote is within the

maximum distance from the water
heater of 98 feet.

B Ensure that no other device in the

area, such as a cordless phone, is
operating on a frequency similar to
the remote (915 MHz) and causing
interference

Troubleshooting

Large amounts of metal
or concrete in the

i

structure may have a
blocking effect on the
remote's signal. This
may alter the maximum
distance allowable from
the water heater.

B Move within direct

line of sight of the
water heater to see if
signal will reconnect.

4. Error code and “ ” symbol
will not clear from remote

B Error codes cannot be reset by

using the remote. All errors must be
cleared by using the reset button

on the water heater's main

control panel

• If an error code is generated immedi­ately after the installation of the
remote control transceiver PCB,
ensure two large electrical connec­tors (Fig. 4) on the main PCB are
properly seated.

• Error code may not be resettable.
Consult water heater's installation
manual or www.boschhotwater
further troubleshooting on error
codes.

for

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Troubleshooting

5. Remote will not memorize
desired temperature setting

B Verify that the remote control

"program" button is depressed until
the remote display reads "Pr".

Memorization of a se­lected temperature only

i

saves to the device on
which it was originally
programmed. To re­trieve a memorized tem­perature setting, you
must use the device with
which it was pro­grammed.

6. Priority " " symbol will not
clear

B Verify no hot water is being used

when trying to clear "priority"
function.

B With no hot water running, press

and hold the “ ” or “ ” button
for 5 seconds on the locked out
device (remote or water heater) until
the " " symbol (Fig. 2, Pos. 6)
disappears.

B Do not use any hot water for at least

5 minutes. The priority function
should automatically clear after this
time period.

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6Notes

Notes

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15

BBT NORTH AMERICA
Bosch Group

Bosch Water Heating
340 Mad River Park

Waitsfield, Vermont 05673

800 642-3111
[phone]

For service, see contact information listed on the back of the water heater’s installation manual.