Bosch BC2680RA User manual

SBB808C
Rev. 10/14
Installation Instructions
*SBB808C*
Installation Manual
External Models
BC2680RA
BC2680RA5
BC2180RA
BC2180RA5
AU Service Department: 1300 30 70 37
NZ Service Department: 0800 54 33 52
To be installed and serviced only
by an authorised person
This appliance is not suitable for
use as a pool heater
The "authorised installing person" is
responsible for:
appliance.
2. Ensure unit performs to the
specifications stated on the
3. Demonstrate operation of unit to
customer before leaving.
4.
customer.
Failure to install this appliance in accordance with these installation
instructions may void warranty
In the interest of continued product improvement, Bosch reserves the
right to alter these specifications without notice.
1. Correct commissioning of this
rating label.
Hand these instructions to
This appliance must be installed in accordance with the manufacturer's
installation instructions, AS/NZS5601, AS/NZS3500.4, AS3000 wiring
regulations and all Local Building, Water and Gas fitting regulations.

2
Installation Instructions
1. Included Accessories ............................................................................. 4
2. Optional Accessories ............................................................................. 4
3. Dimensions ............................................................................................. 5
4. Component Details ................................................................................. 6
5. Before Installation .................................................................................. 7
6. Specifications ......................................................................................... 8
7. Choosing Installation Site...................................................................... 9
8. Installation Clearances.......................................................................... 10
9. Installation .............................................................................................. 12
10. Gas Piping .............................................................................................. 13
11. Water Piping ........................................................................................... 14
12. Condensate Piping ................................................................................ 16
13. Electrical Wiring..................................................................................... 17
14. Maintenance ........................................................................................... 20
15. Trial Operation ....................................................................................... 20
WATER QUALITY ......................................................................................... 22
Contents

3
Installation Instructions
Potential dangers from accidents during installation and use are divided into the following three
categories. Closely observe these warnings, they are critical to your safety.
Prohibited Disconnect
Power Earth Be sure to do
Requests to Installers
• In order to use the water heater safely, read this installation manual carefully, and follow the
installation instructions.
•Failures and damage caused by erroneous work or work not as instructed in this manual are not
covered by the warranty.
• Check that the installation was done properly in accordance with this Installation Manual upon
completion.
• After completing installation, please either place this Installation Manual in a plastic pouch and
attach it to the side of the water heater, or hand it to the customer to retain for future reference.
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
Installation Manual
CONDENSING GAS WATER HEATER
BC2680RA BC2680RA5 (Outdoor Installation)
BC2180RA BC2180RA5
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.
DANGER
CAUTION
WARNING
CAUTION
Robert Bosch
(Australia) Pty. Ltd.
• The water heater must be commissioned including checking gas supply pressures at maximum
demand.
• The operation of the water heater should be explained including normal operation & regular
maintenance.
CAUTION

4
Installation Instructions
1. Included Accessories
The following accessories are included with the unit.
Check for any missing items before starting installation.
Q’tyShapePart
Anchoring Screw 1
each
Part Shape Q’ty
5
Owner's Guide,
Installation Manual
(this document)
2. Optional Accessories
The accessories listed below are not
included with the units, but may be necessary
for installation.
Q’tyShapePartPart Shape Q’ty
1
Main Controller
(YPRM67XBN) 1Bathroom Controller
(YPRS67XBN)
Sub Controller
(YPRP62XBN) 1
• Maximum two Sub controllers can be used. See P.18 for details.

5
Installation Instructions
3. Dimensions
HEIGHT OF EACH FITTING
FROM BOTTOM OF CASE
CONDENSATE DRAIN
58
45
HOT WATER OUTLET
50
COLD WATER INLET
30
GAS INLET
1010
50
120
6
×
13 OBLONG HOLE
85
542
10
10
487 31
170
40
27
11
133
AIR INLET
60
120
90
WATER DRAIN VALVE
HOT WATER OUTLET
CONDENSATE DRAIN
WATER DRAIN VALVE
COLD WATER INLET
GAS INLET
WATER DRAIN VALVE
(WATER FILTER)
WIRING THROUGHWAY
AIR INLET
COLD WATER INLET
(
R3/4
)
HOT WATER OUTLET(R3/4)
350
334
217
5628
520
28
21 45 87
97
30
96
102
252
40
296
(VIEW FROM TOP)
GAS INLET(R3/4)
WIRING THROUGHWAY
CONDENSATE DRAIN(R1/2
)
338
<Unit : mm>

6
Installation Instructions
4. Component Details
• BC2680RA series, BC2180RA series
Primary heat exchanger
Flame rod
Burner manifold & gas valve
Circuit board
Fan motor
Gas inlet
Secondary heat exchanger
Igniter
Main flow control valve
Hot water outlet
Cold water inlet
Neutraizer
Flue collar
Anti-frost heater
Thermal fuse
Power code
Water drain valve
Drain outlet
Water drain valve
Water flow sensor
Water inlet thermistor
Anti-frost heater
Water outlet thermistor
Anti-frost heater
Water level electrode
High limit switch
Ignition plug
Freeze protection thermostat

7
Installation Instructions
5. Before Installation
Do Not Use Equipment for Purposes Other Than Those Specified
•Do not use for other than increasing the temperature of the water supply, as unexpected accidents
may occur as a result.
Check Water Supply Quality
•If the water supply is hard, acidic or otherwise impure, treat the water with approved methods in
order to ensure full warranty coverage.
See water quality statement on page 22.
Frost Protection
• When installed, power to the unit must be kept switched on, otherwise the appliance should be drained.
This prevents water freezing, and causing damage to the water heater.
WARNING
CAUTION
Check the Gas
•Check that the data plate (located inside of front cover) or
a temporary label (located on the front cover)
indicates the correct type of gas.
•Check that the gas supply line is sized for
BC2680RA(5): NG 175 MJ/hr, LP 185 MJ/hr
BC2180RA(5): NG 145 MJ/hr, LP 149 MJ/hr for this unit.
• DO NOT OPERATE WITH ANY OTHER GAS TYPE.
Check the Power
•The power supply required is 230/240VAC, at 50Hz.
Using the incorrect voltage may result in fire or
electric shock.
Warning labels
•Located on the left side of the casing -PLEASE READ THESE LABELS CAREFULLY!
For NG Gas

8
Installation Instructions
BC2680RA BC2680RA5
Power Flue
200 -1,000 kPa
2.5 L/min.
520mm (Height) x 350mm (Width) x 170mm (Depth)
18 kg
0.9 L
R 3/4 (20mm)
R 3/4 (20mm)
R 3/4 (20mm)
230 / 240 VAC (50Hz)
46.8W Freeze Prevention 130W
Anchoring Screws
Specifications
6. Specifications •Specifications may be changed without prior notice.
•The capacity may differ slightly, depending on the water
pressure, water supply, piping conditions, and water temperature.
Performance
Model Name
Type
Operating Pressure
Minimum Flow Rate
Dimensions
Weight
Water Holding Capacity
Accessories
Installation
Air Supply/Exhaust
Connection
Sizes
Power Supply
Water Inlet
Hot Water Outlet
Gas Inlet
Supply
Consumption
Item
Gas
Consumption
Maximum Hot Water
Capacity
NG
LP
25°C Rise 26 L/min.
Maximum Performance
175 MJ/hr
185 MJ/hr
R 1/2 (15mm)
Water Outlet
(Drain water)
Outdoor, Wall Mounted
Approval certification number SAI-400151
BC2180RA BC2180RA5
17 kg
0.8 L
21 L/min.
145 MJ/hr
149 MJ/hr
40.6W Freeze Prevention 130W

9
Installation Instructions
7. Choosing Installation Site
* Locate the appliance in an area where water leakage from the unit or connections will not result in
damage to the area adjacent to the appliance or to the lower floors of the structure. When such
locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be
installed under the appliance. The pan must not restrict combustion air flow.
DANGER
Indoor
•This water heater is for outdoor installation only.
Never install it indoors.
Do not enclose the termination with corrugated
metal or other materials.
This will cause carbon monoxide
poisoning and a potential fire
hazard.
• Avoid places where fires are common, such as those where petrol,
benzene and adhesives are handled, or places in which corrosive gases
(ammonia, chlorine, sulfur, ethylene compounds, acids) are present.
May result in fire.
•Avoid installation in places where dust or debris will accumulate.
Dust may block the air-supply opening, causing the performance of the
device fan to drop and incomplete combustion to occur as a result.
•Avoid installation in places where special chemical agents
(e.g., hair spray or spray detergent) are used.
Ignition failures and malfunction may occur as a result.
• Carbon Monoxide Poisoning Hazard. Do not install this water heater in a
mobile home, recreation vehicle or on a boat.
Prohibited
WARNING

10
Installation Instructions
8. Installation Clearances
Before installing, check for the following:
The location of the flue terminal must comply with the clearances shown on this page. If you are
unsure about clearances not indicated here, in general refer to AS/NZS5601, or your local authority.
In Western Australia refer to the WA Office of Energy rules and regulations.
Flue outlet must be free from any combustible material.
WARNING
•Install the water heater in a location where it is free from obstacles and
stagnant air.
•Consult with the customer concerning the location of installation.
•Do not install the water heater near staircases or emergency exits.
•Do not install the water heater where the exhaust will blow on outer
walls or material not resistant to heat. Also consider the surrounding
trees and animals.
The heat and moisture from the water heater may cause discoloration of
walls and resinous materials, or corrosion of aluminium materials.
•Do not locate the vent termination directed towards a window or any
other structure which has glass or wired glass facing the termination.
•Install in a location where the exhaust gas flow will not be affected by
fans or range hoods.
• Take care that noise and exhaust gas will not affect neighbours.
•Avoid installation where the unit will be exposed to excessive winds.
•Before installing, make sure that the vent termination will have the proper
clearances according to AS/NZS5601, or your local authority.
•On combustible surfaces e.g. weatherboards etc. it is not required to
install a fire proof back board.
CAUTION
Prohibited

11
Installation Instructions
CLEARANCES FOR FLUE TERMINAL (front of heater)
The location of the flue terminal must comply with the clearances shown on this page. If you are unsure
about clearances not indicated here, in general refer to AS/NZS5601, or your local authority. In Western
Australia refer to the WA Office of Energy rules and regulations.

12
Installation Instructions
Illustration
9. Installation
Check
4. Drill holes for the remaining four screws.
5. Hang the unit again by the first screw, and then
insert and tighten the remaining four screws.
6. Take waterproofing measures so that water does
not enter the building from screws mounting the
device.
•Make sure the unit is installed securely so that it will
not fall or move due to vibrations or earthquakes.
Securing to the wall
1. Drill a single screw hole, making sure to hit a stud.
2. Insert and tighten the screw and hang the unit by
the upper wall mounting bracket.
3. Determine the positions for the remaining four screws
(two for the top bracket and two for the bottom), and
remove the unit.
•Installation must conform with all local building, water or Gas Regulations or AS/NZS5601.
• The weight of the device will be applied to the wall. If the strength of the wall is not suffi-
cient, reinforcement must be done to prevent the transfer of vibration.
•Do not drop or apply unnecessary force to the device when installing. Internal parts may
be damaged and may become highly dangerous.
• Install the unit on a vertical wall and ensure that it is level.
•Insure no additional pressure is applied to the pipework.
Locating Screw Holes
Mounting
Structure
•When installing with bare hands, take caution to
not inflict injury.
•Be careful not to hit electrical wiring, gas, or water
piping while drilling holes.
Item
CAUTION
Be sure to do
Mounting Bracket
(upper)
Anchoring Screw
Location of Screw Hole
Locating Screw Holes

13
Installation Instructions
Gas Connection
1) Fit a union to the water heater gas inlet for easy connec-
tion and removal. The thread diameter is 20 mm.
THIS DOES NOT INDICATE THE SIZE OF THE GAS
SUPPLY.
2) Fit an AGA / NZGA approved isolating gas cock in the
supply line adjacent to the water heater gas connection.
3) Ensure that the supply pipe and the gas pressure regula-
tor (LPG or Natural Gas) has sufficient flow capacity for
this and other appliances connected to the fitting line.
4) For LPG appliances ensure that gas cylinders are of
sufficient size. The water heater alone will require 2 x
45 Kg capacity cylinders.
5) Before connecting the appliance to the gas service,
purge any debris or air from the gas service.
6) Check all joints for leaks with an approved leak tester
after connection.
Follow the instructions from the gas supplier.
Gas Pressure
Size the gas line according to total MJ/h
demand of the building and length from
the meter or regulator so that the following
supply pressures are available even at
maximum demand refer AS/NZS5601:
Working Gas Supply Pressures
Natural Gas Supply Pressure
Min. 1.13 kPa
Max. 3.00 kPa
LP Gas Supply Pressure
Min. 2.75 kPa
Max. 3.50 kPa
• Please ensure measurement is taken
when the appliance is operating at
maximum load.
10. Gas Piping
The appliance must be disconnected from the gas supply piping system during any pressure testing of
that system at test pressures in excess of 3.5 kPa.
The appliance and its gas connections must be leak tested before placing the appliance in operation.
The inlet gas pressure must be within the range specified. This is for the purposes of input adjustment.
In order to choose the proper size for the gas line, consult local codes and / or the AS/NZS5601.
Measuring Gas Pressure
In order to check the gas supply pressure to the unit, a tap is
provided on the gas inlet. Remove the hex head philips screw from
the tap, and connect a manometer using a silicon tube.
In order to check the gas manifold pressure on the gas valve inside
the unit. The pressure can be checked by removing the hex head
philips screw and connecting a manometer with a silicon tube.
Gas Meter
Select a gas meter capable of supplying
the entire MJ/h demand of all gas appliances
in the building.
Ensure that the gas pipe size is correct. If undersized the appliance will not operate correctly
SERVICE CALLS ARE CHARGEABLE FOR UNITS WITH INCORRECT PIPE SIZES OR BLOCKED GAS OR
WATER FILTERS.
Refer to AS/NZS5601 for pipe sizing and details.

14
Installation Instructions
11. Water Piping
This appliance is suitable for potable water applications. Do not use this appliance if any part has been underwater.
Immediately call a qualified service technician to inspect the appliance and replace any part of the control system and
gas control which has been under water.
Piping and components connected to the water heater shall be suitable for use with potable water.
Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water.
A water heater used to supply potable water may not be connected to any heating system or components previously
used with a nonpotable water heating appliance.
When water is required in one part of the system at a higher temperature than in the rest of the system, means such
as a mixing valve shall be installed to temper the water to reduce the scald hazard.
Installation and service must be performed
by a qualified plumber.
Observe all applicable codes.
• Flush water through the pipe to clean out metal powder, sand and dirt before connecting it.
• Perform the following insulation measures for prevention of freezing.
•Take appropriate heat insulation measures (e.g., wrapping with heat
insulation materials, using electric heaters) according to the climate of
the region to prevent the pipe from freezing.
•Make sure that there are no water leaks from the cold and hot water
supply pipes, then insulate the pipes completely.
•Be sure to also completely insulate the water supply valve and the
cold and hot water connections on the water heater (refer to the figure
on the right).
•Do not cover the water drain plug with insulation so that water in the
pipe can be drained. (Refer to the figure in the right.)
•
Use a union coupling for connecting the pipes to reduce the force applied to the piping.
• When feed water pressure is too high, insert a depressurizing valve, or take water hammer prevention measure.
• Avoid using joints as much as possible to keep the piping simple.
•Avoid piping in which an air lock can occur.
•
Use approved piping materials.
• If installing the unit on a roof (Above lower-level hot water supply):
If the unit is installed on a roof to supply water to the levels below, make sure that the water pressure supplied to
the unit does not drop below 199 kPa. It may be necessary to install a pump system to ensure that the water
pressure is maintained at this level.
Check the pressure before putting the unit into operation.
Failure to supply the proper pressure to the unit may result in noisy operation, shorter lifetime of the unit, and may
cause the unit to shut down frequently.
Completelyinsulate
thewaterinletand
outletfittings.
Insulatethewater
supplyvalvecompletely.
Donotcoverthewater
drainplugwithinsulation
sothatwaterinthepipe
canbedrained.

15
Installation Instructions
Supply water piping
•Do not use PVC, iron, or any piping which has
been treated with chromates, boiler seal or other
chemicals.
•
Pipe sizing from the cold water supply should be
sized according to local BY LAWS for water supply.
•If sludge or foreign matter is present in the water
supply it is recommended that a separate filter/
strainer be fitted to the cold water supply line.
•AGATE VALVE OR BALL VALVE must be used
on the cold water inlet to the water heater. THIS
REQUIREMENT IS AN AUSTRALIA WIDE RE-
QUIREMENT UNDER THE NATIONAL
PLUMBING CODE.
STOP TAPS OR COMBINATION STOP TAPS
AND NON-RETURN VALVES ARE NOT TO
BE USED.
•In order for the client to use the water heater
comfortably, 200 to 1000 kPa of pressure is
needed from the water supply.
Be sure to check the water pressure. If the water
pressure is low, the water heater cannot perform
to its full capability, and may become a source of
trouble for the client.
Drain processing
•Expansion water may drop from the pressure
relief valve and wet the floor.
Hot water piping
•Do not use lead, PVC, iron or any piping which
has been treated with chromates, boiler seal or
other chemicals.
•Keep the pipe lengths to a minimum, and make
sure that the pipework is well insulated as correct
performance of the appliance is dependent on
properly insulated pipework.
•DO NOT FIT ANY VALVES OR RESTRICTORS
TO THE OUTLET OF THE WATER HEATER.
•DO NOT FIT ANY OBSTRUCTION TO THE
PRESSURE RELIEF LOCATED ON THE HOT
WATER OUTLET CONNECTION.
•Use mixing valves with low water resistance. Use
shower heads with low pressure loss.
•If necessary, use a pump or other means to en-
sure that the supply water pressure to the inlet of
the heater does not fall below 199kPa when the
maximum amount of water is being demanded.
Also install a pressure meter on the inlet. If this is
not done, local boiling will occur inside the water
heater causing abnormal sounds and decreasing
the durability of the heat exchanger.
After purging the air from the system using the hot water supply taps, remove the water inlet strainer
located on the cold water supply inlet connection. Remove any debris from the filter and replace.
When replacing the filter, do not over-tighten the “O” ring seal.
It is recommended that for sanitary fixtures use primarily for the purpose of personal hygiene,
that a temperature control device be fitted (such as a tempering valve) as per AS3498.
No pressure reduction valve is required unless the water pressure exceeds 1000 kPa.

16
Installation Instructions
PLEASE FOLLOW LOCAL CODES ABOUT CONDENSATE PIPING.
•This water heater is a high efficiency, fully condensing appliance which produces condensate during
operation. Therefore, it is necessary to install condensate piping. The water heater incorporates a col-
lection, neutralization, and removal system which must be properly drained in order to ensure proper
operation of this appliance.
•The water heater is supplied with a pre-installed condensate neutralization system. No additional neu-
tralizer is required unless local code dictates otherwise.
•In order to drain the condensate, a 15mm (1/2" BSP) male thread fitting is provided at the base of the
water heater.
DO NOT FIT ANY VALVES OR REDUCE THE SIZE OF THIS FITTING OR THE CONDENSATE PIPING
TO LESS THAN 15mm (1/2" BSP).
•Use plastic pipe, such as PVC, for the drain line. Do not use steel, black iron, or any other material which
can corrode when placed into contact with water.
•Keep the length of the drain pipe as short as possible.
•Horizontal runs must be sloped 1/50 downwards the drain.
•The end of the drain pipe must not be submerged in water or blocked in any way.
•Be sure to check that condensate is freely flowing from the drain piping after the system has been
installed. Condensate will begin flowing out of the water heater within 15 minutes after operation has
started.
•Take measures to prevent the condensate drain lines from freezing (insulation, heat tape, electric heat-
ers, etc.).
12. Condensate Piping

Slope pipe
downwards 1/50.
1/2" PVC pipe
The end of the drain pipe
must have an air gap.
KEEP CLEARANCE
Condensate piping to floor drain
Floor drain
DO NOT FIT
ANY VALVES

17
Installation Instructions
Do not connect electrical power to the unit until all electrical wiring has been completed.
Consult a qualified electrician
for the electrical work.
13. Electrical Wiring
This appliance must be electrically earthed in accordance with Electrical Authority Regulations.
Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper
and dangerous operation.
Verify proper operation after servicing.
Field wiring to be performed at time of appliance installation.
•The appliance is equipped with a 1.5m cable with a three pinned earthed plug to be connected to
230/240VAC at 50 Hz.
The power consumption may be up to 177W.
Use an appropriate circuit.
• The appliance requires a 240V in Australia and 230V in New Zealand, 50Hz weatherproof plug
installed in a protected position adjacent to the appliance.
• If the power cord is damaged and requires replacement, use only an original spare part available
from the manufacturer.
•Do not disconnect the power supply when not in use. When the power is off, the freeze prevention
in the water heater will not activate, resulting in possible freezing damage.
• Do not let the power cord contact the gas piping.
Tie the redundant power cord outside the water heater. Putting the redundant length of cord
inside the water heater may cause electrical interference and faulty operation.
Disconnect Power
Electrical Shock Hazard
Do not turn power on until electrical wiring is finished. Disconnect power before servicing.
Failure to do so may result in death or serious injury from electrical shock.
WARNING
Electrostatic discharge can affect electronic components. Take precautions to prevent electrostatic discharges from
personnel or hand tools during the water heater installation and servicing to protect product’s electronic control.
CAUTION
Earth
•To prevent electrical shock, always plug power lead into an earthed point.

18
Installation Instructions
The bathroom and sub controllers have a maximum temperature setting of 50°C for safety. To ensure compliance with
Australian Standard AS/NZS3500.4, for sanitary areas, which may be achieved by using a Bosch appliance with a
delivery temperature greater than 50°C and installed with a tempering valve. In New Zealand, please refer to the New
Zealand Building Code and all other applicable electrical, gas fitting and plumbing codes.
Changing the Maximum Temperature install the remote controller according to the installation guide.
<The changing procedure of the maximum temperature setting.>
1. Turn the water heater off by pressing the ON/OFF button on the remote controller.
2.Disconnect electrical power to the water heater.
3. Remove the front cover of the water heater (4 screws).
4. Locate bridge attached to the inside of the front cover, and insert the bridge
into plastic clip between the remote controller terminals as shown on the right.
5. Replace the front cover of the water heater (4 screws).
6. Reconnect electrical power to the water heater.
Main controller
Bathroom controller
Sub controller
YPRM67XBN
YPRS67XBN
YPRP62XBN
Max temperature 60°C *
Max temperature 50°C
Max temperature 50°C
Applicable Model
* Maximum temperature is controlled by the maximum default temperature set in the water heater.
* Bath Fill temperature setting is 37 - 48°C.
• When changing the temperature, make sure to confirm with the customer that the temperature of
the hot water will be very high and that there is a risk of scalding.
WARNING
It is recommended that for sanitary fixtures use primarily for the purpose of personal hygiene,
that a temperature control device be fitted (such as a tempering valve) as per AS3498.
Remote Controller
The following combination of remote controls will operate the water heater.
Only Main Controller Works
Only Bathroom Controller Won't work
Only Sub Controller Won't work
Main & Bathroom Controller Works
Main, Bathroom & 1 or 2 Sub Controllers Works
Main & Sub Controller Won't work
Bathroom & Sub Controller Won't work
Remote controller
* The Bosch water heater has been factory set to allow a maximum
temperature setting of 55°C.
To change the maximum temperature setting, connect the temperature
selection wire as shown in the below diagram. The default temperature
is 55°C when the temperature selection wire is not connected.
Bridge
Factory Setting
37 - 55°C
37 - 50°C
37 - 50°C
Connector in
37 - 60°C
37 - 50°C
37 - 50°C
Factory Setting
37 - 50°C
37 - 50°C
37 - 50°C
Connector in
37 - 42°C
37 - 42°C
37 - 42°C
Main controller
Bathroom controller
Sub controller
Remote controller
YPRM67XBN
YPRS67XBN
YPRP62XBN
BC2680RA BC2180RA BC2680RA5 BC2180RA5
Bridge

19
Installation Instructions
Remote controller cord
• Use remote controller cord for any extensions.
• Install according to the National Electrical Code and all applicable local codes.
Connecting Remote Controller Cord to Unit
•Tie the redundant cord outside the water heater. Do not put the extra length inside the water heater.
• The remote controller cord can be extended up to 20m.
•Be sure to hand tighten when screwing to the terminal block. Power tools may cause damage to the
terminal block.
1. Disconnect electrical power to the water heater.
2. Leave enough slack so that the remote controller
cord will not be damaged if the unit is removed from
the wall.
3. Remove the front cover of the heater (4 screws).
4. Pass the remote controller cord through the wiring
throughway and into the unit.
5. Connect the Y terminals at the end of the remote
controller cord to the terminal block.
6. Secure the remote controller cord with a clamp.
7. Replace the front cover.
Remote Controller Cord
Wiring
Throughways
Cord Clamp
Remote
Controller
Terminals

20
Installation Instructions
(1) Open a hot water fixture and confirm that the Burner On lamp comes on, and that hot water is
being produced. (If necessary, repeat until the air in the gas piping is bled out).
* White smoke may be noticed from the exhaust vent during cold weather. However, this is not a
malfunction of the unit.
* If an “11” error code appears on the remote controller, turn the unit off and then back on again,
and then open a hot water fixture again.
(2) Change the temperature setting on the remote controller and check that the water temperature changes.
•If the water heater does not operate normally, refer to “Troubleshooting” in the Owner's Guide.
*After the trial operation, clean the filter in the cold water inlet.
14. Maintenance Periodically check the following to ensure proper
operation of the water heater.
•The venting system must be examined periodically by a qualified service technician to check for
any leaks or corrosion.
•The burner flame must be checked periodically for a proper blue colour and consistency.
•If the flame does not appear normal, the burner may need to be cleaned.
•If the burner needs to be cleaned, it must be performed by a qualified service technician.
•Do not obstruct the flow of combustion and ventilation air.
• See Owner's Guide for further maintenance or consult Bosch Hot Water for recommended service checks.
Warning: There is a scald potential if the output temperature is set too high.
Should overheating occur, or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.
Do not use this appliance if any part has been under water. Immediately call a qualified service
technician to inspect the appliance and to replace any part of the control system and any gas control
which has been under water.
Periodically check and clean the filter inside the cold water inlet of the unit.
15. Trial Operation
The installer should test operate the unit, explain to
the customer how to use the unit, and give the owner
this manual before leaving the installation.
•Preparation ........... (1) Open a hot water fixture to confirm that water is available, and then close
the fixture.
(2) Open the gas supply valve.
(3) Turn on the power supply. Using the remote controller, turn on the Power
On/Off button (the Operation lamp will turn on).
Handling after trial operation
•If the unit will not be used immediately, close off all gas and water shutoff valves, drain all of
the water out of the unit and the plumbing system to prevent the unit and system from freezing,
and bleed the gas out of the gas line.
Freezing is not covered by the warranty.
CAUTION
Servicing by qualified techniction should be performed every two years.