Bosch BC2680RA5 User manual

SBB808B
Rev. 04/14
CONDENSING GAS WATER HEATER
Owner’s Guide
Robert Bosch (Australia) Pty. Ltd.
Thank you for purchasing this Bosch Condensing Gas Water Heater.
Before using, please:
Read this manual completely for operation instructions.
Confirm warranty and proof of purchase.
Keep this manual where it can be found whenever necessary.
Installation must conform with local codes, or in the absence of local codes, AS5601, AS/
NZS3500.4, AS3000 wiring regulations and all Local Building, Water and Gas fitting regulations.
Bosch reserves the right to discontinue, or change at any time, the designs and/or specifications of
its products without notice.
- Do not store or use petrol or other flammable vapours and liquids in the
vicinity of this or any other appliance.
-WHAT TO DO IF YOU SMELL GAS
• Do not try to light the appliance.
•Do not touch any electrical switches; Do not use electrical appilances,
including the phone” inside the building.
•Immediately call you gas supplier, from a safe distance from the gas leak.
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or death.
WARNING
- To be installed and serviced only by an authorised person
- This appliance is not suitable for use as a pool heater
Models BC2680RA BC2680RA5
BC2180RA BC2180RA5
Operating Instructions
* Note : This appliance requires a minimum flow rate to operate of 2.5 litres/min., water fixtures with a
flow rate of 7.5 litres/min. or higher are recommended.
For optimum performance we reommend installation of Bosch optional temperature controllers.
*SBB808B*

2
Operating Instructions
Prohibited Don’t
touch.
Don’t
disassemble
the equipment.
Don’t touch
with a wet
hand.
No flame.
High
Temperature.
To prevent damage to property and injury to the user, the icons shown below will be used to warn of
varying levels of danger.
Every indication is critical to the safe operation of the water heater and must be understood and observed.
Potential dangers from accidents during installation and use are divided into the following four
categories. Closely observe these warnings; they are critical to your safety.
Other icons
DANGER
WARNING
CAUTION
DANGER indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a potentially
hazardous situation which, if not avoided, may result in property damage.
CAUTION
Be sure
to do. Earth
Electric
Shock.
DANGER
Icons warning of risk level
Important Safety Information
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
Vapours from flammable liquids will explode and catch fire causing death or severe burns.
Do not use or store flammable products such as petrol, solvents or
adhesives in the same room or area near the water heater.
Prohibited
Keep flammable products:
1. Far away from the water
heater.
2. In approved containers.
3. Tightly closed.
4. Out of children’s reach.
Vapours:
1. Cannot be seen.
2. Vapours are heavier than air.
3. Go a long way on the floor.
4. Can be carried from other rooms
to the main burner by air currents.
Vapours
Hot Water Heater temperatures over 50 °C can cause severe burns instantly or
death from scalding.
Children, disabled and elderly are at the highest risk of being scalded.
Feel water temperature before bathing or showering.
Temperature limiting valves are available, ask licensed installer.
Prohibited
(Continued)

3
Operating Instructions
No flame.
(Continued)
Prohibited
WARNING
Be sure
to do.
When a gas leak is noticed:
1. Stop use immediately
2. Close the gas valve
3. Contact your gas supplier immediately
If you detect abnormal combustion
or abnormal odours, or during an
earthquake, tornado or fire:
1. Turn off the hot water supply
2. Turn off the power to the water heater
3. Turn off gas and water supply valve.
4. Call the Bosch Helpline
AU 1300 30 70 37 NZ 0800 54 33 52.
Be sure
to do.
(Continued)
Check the temperature
of the running hot water
before entering the
shower.
Check the temperature
before stepping into
the bath tub.
High
Temperature.
A. This water heater does not have a
pilot. It is equipped with an
ignition device that automatically
lights the burner. Do not try to
light the burner by hand.
B. BEFORE OPERATING smell all
around the water heater area for
evidence of leaking gas. Be sure
to smell next to the floor because
some gas is heavier than air and
will settle on the floor.
WHAT TO DO IF YOU SMELL GAS.
• Do not try to light any
appliance.
• Do not touch any electrical
switch; do not use any phone
in your building.
• Immediately call your gas
supplier.
Follow the gas supplier’s
instructions.
C. Use only your hand to turn the
gas valve knob. Never use tools.
If the knob will not turn by hand,
don’t try to repair it. Call a
qualified service technician.
Force or attempted repair may
result in a fire or explosion.
D. Do not use this water heater if
any part has been under water.
lmmediately call a qualified
service technician to inspect the
water heater and to replace any
damaged parts.
Do Not Install Indoors.
This will cause carbon monoxide poisoning and a potential fire hazard.
Indoor
Leave the proper clearance between
the water heater and nearby objects
(trees, timber, boxes with flammable
materials etc.).
Be sure
to do.
Left side:
Min. 500mm Right side:
Min. 500mm
Front:
Sug. 600mm
Upper:
Min. 500mm

4
Operating Instructions
Important Safety Information
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to
bathe unsupervised.
Do not touch the power
cord with wet hands.
Electric
Shock.
Don’t touch
with a wet
hand.
Prohibited
Contact Bosch before using with
a solar pre-heater.
Contact a qualified service
technician for any necessary
repairs, service or maintenance.
Don’t
disassemble
the equipment.
Be sure
to do.
Be sure the gas matches
the gas on the data plate
(inside of frontcover) or
gas type label (right side
of casing).
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
Be sure
to do.
Be sure
to do.
Do not place combustibles such as
laundry, newspapers, oils etc. near
the heater.
Prohibited
Do not use combustible chemicals
such as oil, petrol, benzene etc. in
the near the water heater or the
exhaust vent.
Do not store or use petrol or other
flammable vapours and liquids in the
vicinity of this or any other appliance.
Prohibited
Prohibited
Do not place or use a spray can
near the water heater or the exhaust
vent.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
Prohibited
Prohibited
Unit
For NG Gas
(Continued)
Do not place the unit in an indoor en-
vironment by means of adding walls
and ceiling (Do not enclose using
corrugated sheets, etc.)
Carbon monoxide poisoning or fire may
occur as a result.
Unit
Prohibited
Carbon Monoxide Poisoning
Hazard. Do not install this water
heater in a mobile home, recreation
vehicle or on a boat.
Prohibited
NG

5
Operating Instructions
CAUTION
Be sure to electrically earth the
unit.
Keep power cord free of dust.
Earth
Be sure
to do.
Do not use the water heater for
other than hot water supply, shower
and bath.
Prohibited
Prohibited
Do not cover the water heater, store
trash or debris near it, or in any way
block the flow of fresh air to the unit.
Do not turn off the water heater
while someone is bathing.
Prohibited
Do not use a broken or modified power
cord. Do not bind, bend or stretch
power cords. Do not scratch, modify,
or subject them to impact or force.
Do not touch the exhaust vent
during or immediately after
operation of the water heater.
Do not install in locations where
excessive dust or debris will be
in the air.
Prohibited
Don’t
touch.
Prohibited
Be sure
to do.
To prevent burns or scalding, turn
off the power button and wait until
the equipment cools before per-
forming maintenance. Do not use condensate, discharged
from the drain pipe, for drinking or
for consumption by animals.
Prohibited

6
Operating Instructions
Important Safety Information
CAUTION
Do not drink water that has been inside the
unit for an extended period of time. Do not
drink the first use of hot water from the
unit in the morning.
Clean the filter on the water inlet as
frequently as required. The quality of your
local water will affect the frequency required.
Keep the area around the unit clean.
If boxes, weeds, cobwebs, cockroaches etc. are in
the vicinity of the unit, damage or fire can result.
Do not install the equipment where the
exhaust will blow on walls or windows.
Treat hard, acidic or otherwise impure
supply water with approved methods to
ensure full warranty coverage.
Problems resulting from scale formation
are not covered by the warranty.
Preventing damage from freezing ( p.23)
Damage can occur from frozen water within the
device and pipes even in warm environments.
Be sure to read below for appropriate measures.
Repairs for damage caused by freezing are not
covered by the warranty.
Do not use parts other than those specified
for this equipment.
Power must be switched on at all times for
antifrost protection to work.
If it is snowing, check the air inlet, exhaust
gas vent and exhaust vent terminal for
blockage.
Do not disassemble the remote controller.
Do not use benzene, oil or fat detergents
to clean the remote controller.
This may cause deformation.
Do not get the remote controller wet.
YPRS67XBN and YPRP62XBN are water resistant,
too much water can cause damage.
YPRM67XBN is not water resistant.
Do not splash water on the remote
controller. Do not expose the remote
controller to steam.
Do not locate the remote controller near stoves or
ovens, this may cause damage or failure.
Do not run water through the unit when
unit is not on.
When discharging hot water, make sure the unit is ON.
If water is run through the unit with the unit
OFF, water may condense inside the unit and cause
incomplete combustion or damage to the internal
electrical components.

7
Operating Instructions
Important Safety Information....................................................................... 2
Contents ........................................................................................................ 7
Overview of Condensing Gas Water Heater ............................................... 8
General Parts
Main Unit.................................................................................................... 9
Names and Functions of Controllers
Main Controller (YPRM67XBN) ............................................................... 10
Bathroom Controller (YPRS67XBN) ....................................................... 11
Sub Controller (YPRP62XBN) ................................................................. 12
Initial Operation ........................................................................................... 13
Clock Adjustment ........................................................................................ 14
Call Function ................................................................................................ 15
Setting and Using the Water Heater........................................................... 16
Controller Priority Function ........................................................................ 18
Muting the Remote Controller .................................................................... 19
Bath Fill Function ........................................................................................ 20
Frost Protection ........................................................................................... 23
Regular Maintenance................................................................................... 24
Troubleshooting .......................................................................................... 26
Follow-up Service ........................................................................................ 30
Specifications .............................................................................................. 31
Manufacturer’s Warranty ............................................................................ 35
Contents

8
Operating Instructions
Cold water Gas Hot water
About 200˚C
Exhaust
Conventional
type
Combustion gas
About 200˚C
Primary heat exchanger
Cold water Gas Hot water
Condensate
Neutralizer
Primary heat exchanger
Combustion gas
About 200˚C
Secondary heat exchanger
Exhaust
About 50 ˚ C
Condensing
Gas Water
Heater
Water is heated
using the exhaust
gas which is about
200˚C
.
The condensing gas water heater
discharges condensate.
When heat from the exhaust gas is collected
within the secondary heat exchanger,
condensation occurs from moisture in the
exhaust gas and the resulting water is
discharged from the drain pipe (approx. 75cc
/min. maximum). It is not a water leak. Do not
plug or block the drain line as it must always
be allowed to freely flow.
Drain pipe
(Installation example)
Overview of Condensing Gas Water Heater
This water heater is a high efficiency, fully condensing appliance. Unlike a traditional water heater, a
condensing appliance captures heat from the exhaust gas and uses it to preheat the incoming cold
water as it passes through the secondary heat exchanger as illustrated below.
The condensing gas water heater
tends to show white steam.
After the exhaust gas passes through the
secondary heat exchanger, it becomes low in
temperature and moisture rich which tends to
produce steam at the vent discharge terminal.
This is a normal occurrence.
Condensate
comes out
from here.
During combustion, white
steam may often be seen.
This is normal.

9
Operating Instructions
Main Unit
General Parts
Outdoor Wall Mounted, Power flue Model
* The above illustration shows an example of installation.
The exact installation configuration may be slightly different.
Front Cover
Air Inlet
Water Supply Valve
Gas Supply Valve
Water Drain Valve (with Water Filter)
(Inside Water Inlet) (p.25)
Flue Collar
Drain Pipe
Discharges the
condensate.
Hot Water Pipe
External Weatherproof Power Point

10
Operating Instructions
Main Controller (YPRM67XBN) <Optional>
* Before use, remove the protective sheet from the remote controller surface.
What is actually displayed depends on how the water heater is set.
Names and Functions of Controllers
Error Code
A number will flash if
a failure occurs.
(p.29)
Burner On Indicator
When this indicator is lit,
the hot water temperature
can be set. ( p.18)
Priority Indicator
When burning, the
indicator is lit.
( p.17, 21)
Clock
When Time Set button
is pushed, the clock is
displayed. (p.14)
Setting Buttons
For setting the hot
water temperature
( p.16 -17)
For other settings.
Operation Button
For turning the water
heater on or off.
Bath Fill Button
To activate Bath Fill.
To set Bath Fill
temperature.
( p.20 -22)
For setting the amount
of water that is delivered.
( p.20 -22)
Bath Fill Temperature Indicator
When this indicator is lit,
bath fill temperature is
displayed. ( p.20 -22)
Temperature setting
(Eg.: 40°C)
Bath Fill Temperature setting
(Eg.: 40°C)
(p.20 -22)
Bath Fill Volume setting
Display
The illustration below shows the remote controller display.
What is actually displayed depends on how the water heater is set.
Display
Time Set Button
To set or lndicate Time
of day. (p.14)
Bath Fill Volume Button

11
Operating Instructions
Bathroom Controller (YPRS67XBN) <Optional>
* Before use, remove the protective sheet from the remote controller surface.
What is actually displayed depends on how the water heater is set.
Setting Buttons
For setting the hot
water temperature
( p.16 -17)
For other settings.
Operation Button
For turning the water
heater on or off.
Bath Fill Button
To activate Bath Fill.
To set Bath Fill
temperature.
( p.20 -22)
Error Code
A number will flash if
a failure occurs.
(p.29)
Burner On Indicator
When this indicator is lit,
the hot water temperature
can be set. ( p.18)
Priority Indicator
When burning, the
indicator is lit.
( p.17, 21)
Bath Fill Temperature Indicator
When this indicator is lit,
bath fill temperature is
displayed. ( p.20 -22)
Temperature setting
(Eg.: 40°C)
Bath Fill Temperature setting
(Eg.: 40°C)
(p.20 -22)
Bath Fill Volume setting
Display
The illustration below shows the remote controller display.
What is actually displayed depends on how the water heater is set.
Display
Call Button
To sound alarm at all
remote controls. (p.15)
Priority Button
To transfer control from
another remote .
( p.18)

12
Operating Instructions
Sub Controller (YPRP62XBN) <Optional>
* Before use, remove the protective sheet from the remote controller surface.
What is actually displayed depends on how the water heater is set.
Error Code
A number will flash if
a failure occurs.
(p.29)
Burner On Indicator
When this indicator is lit,
the hot water temperature
can be set. ( p.18)
Priority Indicator
When burning, the
indicator is lit.
( p.17, 21)
Setting Buttons
For setting the hot
Water temperature.
( p.16 -17)
Temperature setting
(Eg.: 40°C)
Display
The illustration below shows the remote controller display.
What is actually displayed depends on how the water heater is set.
For turning the water
heater on or off.
Display Operation Button

13
Operating Instructions
Initial Operation
Before the first use of your water heater, make the following preparations.
Follow steps 1 through 4.
1Open the water supply valve.
Open a hot water fixture to confirm that
water is available, and then close the
fixture again.
3Open the gas supply valve.
Hot water fixture
2
Turn on the power.
CLOSED
4
OPEN
ter

14
Operating Instructions
Clock Adjustment
1, 3
2
Adjust the clock
The time changes in 1-minute increments
with each press on the button, and
then in 10-minute increments if the
button is kept pressed down.
23
(Eg.: AM 10:15)
(Main Controller)
Press the Set
Time Button
1Press the Set
Time Button
Note: Only the main controller has a clock
function.
Increase
Decrease
Flashing Flashing
The flashing changes to
constant illumination when the
clock has been set.
Flashing
•The clock display will disappear if hot water is used or the temperature of the hot water is changed during
the clock display.
•If the Time set button is pushed when the hot water is being used or a high temperature (60°C) is set, the
clock is displayed for 10 seconds and will return to the original screen display after that.
•In the event of a power cut or after disconnecting the power supply, the clock on the display screen will
show 0:00 when the power is restored. In this case the clock will need to be reset.
Clock setting and the clock can be dis-
played regardless of “ON or OFF" of
the operation button.
(The illustration is in a state of "OFF".)
(Until “0:00” is flashing)
Display the clock
Press the set time button.
The clock display will then return to the original screen display.

15
Operating Instructions
The call button can be used to sound an alarm at the
Main Controller.
(Conversation is not possible as it is not an intercom.)
Press the call button.
Shampoo
Pi!
Pi!
Pi!
•The call button can be used regardless of whether the operation button is turned “on” or “off”.
The alarm sounds for as long as
the button is pressed.
1
1
(Bathroom Controller)
Call Function

16
Operating Instructions
Remote Controller Display
Press the Operation
Button.
Previous set temperature
(Eg.: 40°C)
The temperature will be
displayed on the remote
control thermostat.
1
2(Starting with the Operation Off)
On
On
High Temperature
To prevent scalding:
Flashes for 10 sec
1
DANGER
Hot Water Heater temperatures over 50°C can cause
severe burns instantly or death from scalding.
•Children, disabled and elderly are at the highest risk of being scalded.
Feel water temperature before bathing or showering.
Temperature limiting valves are available, ask licensed installer.
•When setting the unit to 60°C ( p.17), the temperature
display will flash for 10 seconds and emit a tone as a high
temperature warning.
•Take caution when using the unit again after setting to 50°C
or higher. Always check the set temperature before use.
(Main Controller)
Setting and Using the Water Heater

17
Operating Instructions
4
3Turn on hot
water.
2
Set temperature.
Turn off the hot
water.
(
Always check the
)
temperature setting
before use.
Hot
Cold
Check the indicator lights.
Water temperature
On Off
(°C: )
The temperature settings below are examples. The temperature setting
necessary depends on the usage, the length of piping or seasons.
*Initial factory setting is 40°C
* For most residential applications, the recommended setting temperature is 50°C or less.
For applications that occasionally require a higher temperature setting, locate the remote controller
in a convenient location.
* Consult local codes for minimum operating temperatures.
Shower, hot water supply, etc. High temperature
37 38 39 40 41 42 43 44 45 46 47 48 50 55 60
Hot water supply, etc.
Bathroom and Sub controller are these ranges.
[RA5: Main and Bathroom and Sub controller are these ranges.]

18
Operating Instructions
When the temperature cannot be adjusted, follow the procedure below. <Priority button>
Off
Off
(Temperature settings for example.)
Temperature cannot be adjusted Switch priority Temperature can be adjusted
Press the priority button
Turn off the
operation button.
* Care must be taken as operation is interrupted.
Off On
Hot water supplied from this appliance is delivered to the kitchen, washroom, and shower, etc. at the
same temperature.
The water temperature can only be changed by one remote controller if a number of remote controllers
are installed.
Only the controller with the priority light illuminated will be able to adjust the temperature of the water
heater.
• The remote controller on which the operation button is turned “on” has priority.
•If the Bathroom or Sub controller has priority left ON, press OFF & ON any other controller to transfer
priority to that controller. This function cannot be changed while the appliance is producing hot water
(Except when hot water is operating).
Priority
Turn on the operation
button once again.
Bathroom Controller
Main Controller
On
On
Off Turn off the
operation button.
* Care must be taken as operation is interrupted.
Turn on the operation
button once again.
Sub Controller
On
Controller Priority Function

19
Operating Instructions
The remote controller will emit a sound
when any button is pushed. This sound
can be muted if it is desired.
1
Muting the Remote Controller
* Initial factory setting is with sound
Sound
Muted
No sound
after 5 sec.
1Hold the Operation Button
for five seconds.
Tone sounds
after 5 sec.
• The bath fill and the call function alarm are not muted.
(Main Controller)
(Bathroom Controller)
(Sub Controller)
1
1No sound
after 5 sec. Tone sounds
after 5 sec.

20
Operating Instructions
2
3
1
Press the
Operation Button
Plug the bath drain.
Preparation
(Starting with the operation off)
On
The temperature will be displayed
on the remote control thermostat.
Previous set temperature
(Eg.:40°C)
On
1Press the Bath
Fill Button
On
2
10 seconds
after flashing.
(Main Controller)
2
3
1
(Bathroom Controller)
44
Bath Fill Function
Bath Fill temperature
(Eg.:42°C)
Flashes for 10 sec. On
Flashes for 10 sec. On