Bosch 250SXO User Manual

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Bosch Remote Control for

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

6 720 606 990 (07.01) JS

Contents

Contents

1Declaration 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

4.2Remote control transceiver PCB

 

installation

5

4.3

Remote control activation

7

4.3.1

AF board

7

4.3.2

SU board

8

4.4Hot 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

 

 

 

6

Notes

15

2

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Safety instructions

Safety instructions

BRead 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.

1Declaration of conformity 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.

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.

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

2Remote control data

Remote control for temperature adjustment of Bosch water heaters GWH- 635-ES/ESO/250SX/250SXO/ 2400E/2400EO.

Technical Data:

Battery power

Alkaline AA LR 6

supply

2 x 1.5V

Frequency

915 MHz

Type of

IP X6

protection

 

User range

98 ft (30 m)

 

 

1Remote control

2 Remote control transceiver PCB

3Support block

4PCB connection cable

4Using the remote con-

trol

4.1Description of the LCD

Further Indications:

Remote

Up to 6 remote controls

Fig. 2

Multifunctional LCD

 

control

can be programmed

for

 

 

 

 

 

 

 

 

one single appliance..

 

1

Displays temperature, error codes

 

 

 

 

 

and functions

 

 

3

Parts supplied

 

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

4.2Remote control transceiver PCB installation

Warning: For safety reasons, disconnect the power supply to the water heater before performing installation.

Pre-installationpreparation

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.

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

BRemove 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. 3

B Remove the 5 screws on the front retaining bar (see Fig. 3, pos. 1 and

Fig. 4 Electrical strip connectors

BAt 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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Using the remote control

BWhile 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

BReplace the control unit cover with the 4 Philips head screws (Fig. 5, pos. 1).

B Slide control unit back into heater.

BPlug 2 yellow electrode wires from the top of the control unit back onto the ignition electrodes (Fig. 3, pos. 3).

i

Wire polarity does not

matter on the electrode

 

 

wires.

 

 

BPull 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).

BReplace front retaining bar using 5 Philips head screws. (Fig. 3, pos 1).

4.3Remote control activation

i

Before

the

remote

control will work, it must

 

 

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:

BTurn power switch on the water heater to the off position (O).

BWhen turning power switch to the on position, note the first two letters that appear on the display (should be AF or SU).

BIf 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 andon 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 anduntil 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 orin 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.

BPress 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 oruntil 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 orin order to reach requested temperature.

New remote control is programmed.

4.4Hot water temperature adjustment by remote control

B Press the buttons oron 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 oron 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.

i

Note: Previously saved

temperature may show

 

 

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 temperature

B Only one temperature per remote control can be memorized using the "Program" button on the remote control.

BAt 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.

i

Up to six addition remote

controls can be used to

 

 

memorize a temperature

 

for each remote control.

 

 

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

To operate the equipment with a previously memorized temperature:

BPress 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

i

Temperature cannot be

memorized or changed

 

 

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:

Bpress 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:

BMove the heater's main switch to the on position (I).

BPress and hold " " or "" to select the desired temperature.

BPress and hold the "Program" button until the symbol "Pr" appears on the remote control display.

B Use the hot water within two minutes of acquiring "priority”.

i

"Priority"

cannot

be

acquired

while the

hot

 

water tap is open.

4.7Error 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

5Troubleshooting

5.1Replacing batteries

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

BRemove 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.

i

Verify

that the

rubber

seal

is

correctly

fitted

 

 

between

both

plastic

 

housing parts.

 

 

 

 

 

 

BClose the battery housing using the two screws.

Warning: dead batteries must be replaced.

Consequently, the manufacturer is not liable for any faults or damage caused by dead batteries.

Dispose of the dead batteries properly.

5.2Cleaning

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

5.3Troubleshooting

1. No display on remote control

BCheck for weak or dead batteries (see section 5.1).

Remote control in sleep mode.

i

If not used

for a few

minutes, the

remote's

 

display will go blank to save batteries.

Bsimply press any button on the remote to bring up the display.

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

BEnsure that you are standing directly in front of the water heater when attempting to activate.

BEnsure 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

BDouble 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

BVerify 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.

BVerify there is proper voltage to the water heater (120VAC/60Htz).

BVerify the remote is within the maximum distance from the water heater of 98 feet.

BEnsure 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

i

Large amounts of metal

or concrete in the

 

 

structure may have a

 

blocking effect on the

 

remote's signal. This

 

may alter the maximum

 

distance allowable from

 

the water heater.

BMove 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 for further troubleshooting on error codes.

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13

Troubleshooting

5. Remote will not memorize desired temperature setting

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

i

Memorization of a se-

lected temperature only

 

 

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 " " symbol will not clear

BVerify no hot water is being used when trying to clear "priority" function.

BWith 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.

BDo not use any hot water for at least 5 minutes. The priority function should automatically clear after this time period.

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Notes

6Notes

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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

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