BoschRemoteControlfor
GWH-635-ES/ESO/250SX/250SXO/2400E/2400EO
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Safety instructions
Safety instructions
1
Declaration of con-
formity FCC
B Read the following instructions very
carefully to ensure correct
operation.
This device meets the requirements of
FCC Directives.
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 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.
Caution: the remo-
te
control
is
waterproof and can
also be used in the
shower
vertheless,
. Ne-
you
should ensure it is
not immersed in
water, for instance
in the bathtub
.
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3
Remote control data
1
2
3
4
Remote control
Remote control transceiver PCB
Support block
2
Remote control data
Remote control for temperature adjust-
ment of Bosch water heaters GWH-
635-ES/ESO/250 SX/250SXO/
2400E/2400EO.
PCB connection cable
4
Using the remote con-
trol
Technical Data:
4.1 Description of the LCD
Alkaline AA LR 6
2 x 1.5V
Battery power
supply
Frequency
915 MHz
Type of
protection
IP X6
User range
98 ft (30 m)
Further Indications:
Remote
control
Up to 6 remote controls
can be programmed for
one single appliance..
Fig. 2
Multifunctional LCD
1
Displays temperature, error codes
and functions
2
"Remote control in operation"
indication (signal arriving at remote
control)
3
Parts supplied
3
4
5
Device in operation (with burner
on)
Temperature measurement unit
(possible in °C and °F)
Remote control battery level
indication (weak signal coming
from the remote control)
Priority function (temperature
cannot be modified by other user
when water is running)
6
7
"Error code" symbol
Fig. 1
Parts
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4
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Using the remote control
2) being careful not to damage the
foam sealant material on it.
4.2 Remote control trans-
ceiver PCB installation
B Remove control unit auxiliary cover
(Fig. 3, pos. 4).
Warning: For safe-
ty reasons, discon-
nect the power
supply to the water
heater before per-
forming installation.
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.
Pre-installation preparation
B Disconnect power supply to heater.
B Remove plastic decals on front
panel.
Once auxiliary cover
is off, pull off the two
electrical strip
B Loosen two Philips head screws
connectors from the
board. Once off, the
wiring harness can
be removed from the
case by pulling their
rubber seals
located behind plastic decals.
B Lift front cover upward and remove.
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.
Fig. 3
B Remove the 5 screws on the front
retaining bar (see Fig. 3, pos. 1 and
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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. 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. 5
B Remove the other protective cover
and attach 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).
4.3 Remote control
activation
Before
control will work, it must
be activated using the
the
remote
B Slide control unit back into heater.
i
B Plug 2 yellow electrode wires from
the top of the control unit back onto
the ignition electrodes (Fig. 3, pos.
3).
procedure
described
below with the operator
standing in front of the
appliance.
Wire polarity does not
matter on the electrode
wires.
i
The remote control initialization
instructions vary based on the version
of control board installed in your
heater.
B Pull end of power cord to take up
excess slack and tighten retaining
nut on the bottom of the heater.
To determine the control board
version in the water 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 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 Replace the control unit auxiliary
cover. (Fig. 3, pos. 4).
B If the letters are AF, follow section
4.3.1. For SU, follow chapter 4.3.2.
B Replace front retaining bar using 5
Philips head screws. (Fig. 3, pos 1).
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). B Press buttons
or
in order
Release program key when LCD
displays “188”.
to reach requested temperature.
New remote control is programmed.
LCD shows “P2”. If not, repeat
previous step.
4.3.2 SU board
B Connect power to heater.
B Select “P3” using buttons
and
on heater.
B Move the main switch on the
appliance to the "OFF" (0) position.
B Press and hold Program key
B Press and hold
key while at the
or
again for 1 sec.
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.
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 Hold remote control in front of the
control panel on the heater and
press simultaneously remote control
B Switch power switch on the
appliance to the "OFF" (0) position
and then back "ON" (I).
buttons
or
until the
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Using the remote control
temperature indication is shown on
the remote control LCD.
4.5 "Program" button on the
remote control
B Switch ON/OFF switch to “OFF”
position (0) and then back on (I).
Memorizing
temperature with the remote
control "Program" button
the
water
B Press buttons
or
in order
to reach requested temperature.
B Press the buttons
or
on
New remote control is programmed.
the remote control (Fig. 9, pos. 2), )
until the required temperature
appears on the remote control
display (Fig. 9, pos. 1).
4.4 Hot water temperature
adjustment by remote
control
B You will now be able to memorize
this temperature by pressing the
"Program" button on the remote
control (Fig. 9, pos. 3) for
seconds.
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).
3
B When the required temperature is
Note: Previously saved
displayed, turn on the hot water tap.
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.
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).
Fig. 8
Temperature adjustment
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9
Using the 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.
Fig. 9
Memorizing water
temperature
4.6 "Priority" function
B Only one temperature per remote
control can be memorized using the
"Program" button on the remote
control.
Temperature cannot be
memorized or changed
using the heater's
i
control panel buttons or
a second remote control
when hot water is in use
(e.g. during a shower)
The "Priority" function
will automatically
B At this point the remote control will
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.
activate to stop another
user from modifying the
temperature when hot
water is in use.
Up to six addition remote
controls can be used to
memorize a temperature
for each remote control.
i
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
Using the "Program" button
(operation
with
memorized
temperature)
To operate the equipment with
previously memorized temperature:
a
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Using the remote control
use (e.g. a shower).
B Press and hold "
" or "
" to
Then, when the hot water is used (e.g.
for a shower), the heater's display and
additional remote control displays will
select the desired temperature.
B Press and hold the "Program" but-
ton until the symbol "Pr" appears on
the remote control display.
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
B Use the hot water within two
minutes of acquiring "priority”.
"Priority" cannot be
have the symbol "
To clear a device that is locked out with
the " " symbol (with no hot water
".
acquired while the hot
water tap is open.
i
4.7 Error messages
running) simply:
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.
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
memorizing the temperature if no hot
water is used immediately
afterwards.
minutes
after
selecting/
To identify the type of error or if the
error will not clear, consult chapter 6 of
the heater installation manual.
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).
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Troubleshooting
5
Troubleshooting
5.1 Replacing batteries
5.2 Cleaning
Use a damp cloth to clean parts of the
remote control. Do not use abrasive or
solvent-based detergents.
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.
5.3 Troubleshooting
1. No display on 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.
B Check for weak or dead batteries
(see section 5.1).
Remote control in sleep mode.
Verify that the rubber
seal is correctly fitted
between both plastic
housing parts.
If not used for a few
minutes, the remote's
display will go blank to
save batteries.
i
i
B Close the battery housing using the
two screws.
B simply press any button on the
remote to bring up the display.
2. Remote control will not activate
/ no number with rotating digit
Warning: dead bat-
teries
must
be
replaced.
Consequently,
B Ensure that you are standing directly
in front of the water heater when
attempting to activate.
the
manufacturer is not
liable for any faults or
damage caused by
dead batteries.
Dispose of the dead
batteries properly.
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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Troubleshooting
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.
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.
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 Move within direct
line of sight of the
water heater to see if
signal will reconnect.
B Verify there is proper voltage to the
water heater (120VAC/60Htz).
4. Error code and “
will not clear from remote
” symbol
B Verify the remote is within the
maximum distance from the water
heater of 98 feet.
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
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
• If an error code is generated immedi-
ately after the installation of the
remote control transceiver PCB,
ensure two large electrical connec-
tors (Fig. 4) on the main PCB are
properly seated.
• Error code may not be resettable.
Consult water heater's installation
further troubleshooting on error
codes.
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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 se-
lected temperature only
i
saves to the device on
which it was originally
programmed. To re-
trieve a memorized tem-
perature setting, you
must use the device with
which it was pro-
grammed.
6. Priority "
clear
" symbol will not
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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14
Notes
6
Notes
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15
BBT NORTH AMERICA
Bosch Group
Bosch Water Heating
340 Mad River Park
Waitsfield, Vermont 05673
800 642-3111
(802) 426-6924
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