Bosch Singular 4000 Bedienungsanleitung

User Manual

Gas Condensing Combi Boilers

Singular

Singular 4000 | Singular 5200

BTC 439003302 A / 03.2021

WARNING:

If the information in these instructions are not followed exactly, a ﬁre or explo-

sion may result causing property damage, personal injury or death.

WARNING:

Do not store or use gasoline or other ﬂammable vapors and liquids in the vicinity

of this or any other appliance.

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 from a neighbor’s phone. Follow the gas

supplier’s instructions.

—If you cannot reach your gas supplier, call the fire department.

WARNING:

Improper installation, adjustment, alteration, service or maintenance can cause

property damage, personal injury (exposure to hazardous materials)* or loss of

life. Refer to the user's information manual provided with this boiler. Installation

and service must be performed by a qualiﬁed installer, service agency or the gas

supplier who must read and follow the supplied instructions before installing,

servicing, or removing this boiler. This boiler contains materials that have been

identiﬁed as carcinogenic, or possibly carcinogenic, to humans.

This boiler must be installed in accordance with local, state, and federal codes.

In the absence of such requirements, then to the latest edition of the National

Fuel Gas Code, ANSI Z223.1./NFPA 54. In Canada, installation must be in

accordance with the requirements of CAN/CSA B149.1, Natural Gas and

Propane Installation Code.

User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

| 3

User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

Table of Contents

1 Key to Symbols and Safety Instructions 4

1.1 Key to Symbols 4

1.2 Safety 4

2 Front Panel 6

2.1 Digital Display and Icons 6

2.2 Buttons 6

3 Operating the Boiler 7

3.1 Turning the Boiler On or Oﬀ 7

3.2 Setting the Space Heating Temperature 7

3.3 Setting the DHW (Domestic Hot Water) Temperature 8

3.4 Viewing Basic Information 8

3.4.1 H0 mode 9

3.4.2 H1 mode 9

3.4.3 H2 mode 9

3.4.4 H3 mode 9

3.4.5 H4 mode 10

3.4.6 H5 mode 10

3.4.7 H6 mode 10

3.4.8 H7 mode 10

3.4.9 H8 mode 11

3.4.10 H9 mode 11

3.4.11 HA mode 11

3.4.12 HB mode 11

4 Inspection and Maintenance 12

4.1 Draining the Boiler 12

4.2 Cleaning the Cold Water Inlet Filter 14

4.3 Cleaning the Air Intake Filter 14

4.4 Protecting the Boiler from Freezing 15

4.5 Maintenance Schedules 15

4.5.1 Owner Maintenance 15

4.5.2 Service Technician Maintenance 15

5 Troubleshooting 17

5.1 Basic Problems 17

5.2 Error Codes 18

User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

1 Key to Symbols and Safety Instructions

1.1 Key to Symbols

Warnings

Warnings in this document are identiﬁed by a

warning triangle printed against a grey background.

Keywords at the start of a warning indicate the type and seriousness

of the ensuing risk if measures to prevent the risk are not taken.

The following keywords are deﬁned and can be used in this document:

DANGER indicates a hazardous situation which, if not avoided, will result

in death or serious injury.

WARNING indicates a hazardous situation which, if not avoided, could

result in death or serious injury.

CAUTION indicates a hazardous situation which, if not avoided, could

result in minor to moderate injury.

NOTICE is used to address practices not related to personal injury.

Important information

This symbol indicates important information where

there is no risk to people or property.

1.2 Safety

Please read before proceeding

WARNING:FIRE,EXPLOSION

Vapors from flammable liquids can explode and/or catch fire

causing death or severe burns.

Keep flammable products far away from the boiler and store

them in approved containers. Keep the containers tightly

closed and out of the reach of children.

The boiler has a main burner flame that can come on at any

time and will ignite flammable vapors.

Vapors cannot be seen and are heavier than air. They can

travel long distances along the ground and can be carried

from other rooms to the boiler’s main burner flame by air

current.

WARNING:SCALDHAZARD

Water temperature over 125°F can cause severe burns or

death from scalding.

Children, the disabled and the elderly are at highest risk of

being scalded.

Test water before bathing or showering.

Temperature TimetoProduceSerious Burn

120 °F (48 °C) More than 5 minutes

125 °F (51 °C) 1.5 to 2 minutes

130 °F (54 °C) Approx. 30 seconds

135 °F (57 °C) Approx. 10 seconds

140 °F (60 °C) Less than 5 seconds

145 °F (62 °C) Less than 3 seconds

150 °F (65 °C) Approx. 1.5 seconds

155 °F (68 °C) Approx. 1 second

Table 1

WARNING:FIRE,EXPLOSION

Do not store combustibles, such as papers or laundry, near

the boiler or venting system.

Do not store or use gasoline or other flammable liquids near

this boiler.

Do not store or use compressed gases, such as hair sprays

or spray paints, near the boiler or venting system, including

the vent termination.

| 5

User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

WARNING:HAZARDOUSVOLTAGE

Do not remove the front cover unless the power to the boiler

is turned off or disconnected.

Do not touch the internal components of the boiler or the

power cord with wet hands.

WARNING:FIRE,CARBONMONOXIDE

Do not operate the boiler with the front cover opened.

Do not operate the boiler without proper venting.

Do not place anything in or around the vent terminals that

could obstruct the air ﬂow in or out of the boiler.

WARNING:FIRE,EXPLOSION

Have your installer or plumber show you the location of the

gas shut off valve and demonstrate how to close the valve. If

the boiler is damaged as a result of overheating, fire, flood,

or any other reason, close the manual shut off valve and do

not operate the boiler again until it has been inspected by a

qualified technician.

WARNING:FIRE,EXPLOSION

Should overheating occur or if the gas supply fails to shut

off, turn off the manual gas shut off valve.

WARNING:PERSONALINJURY,PROPERTY DAMAGE

Do not allow children to operate or have access to the boiler.

WARNING:IMPROPEROR DANGEROUSOPERATION

Immediately call a qualified service technician to inspect the

appliance and replace any part of the control system and/or

any gas control which has been immersed in water.

WARNING:

This product can expose you to chemicals including Lead

and Lead components, which are known to the State

of California to cause cancer and birth defects or other

reproductive harm. For more information go to www.

P65Warnings.ca.gov.

WARNING:PERSONALINJURY,PROPERTY DAMAGE

Do not operate the boiler if you suspect something might be

wrong with it.

CAUTION:INTENDEDUSE

Do not use the boiler for anything other than its intended

purpose, as described in this manual.

WARNING:IMPROPEROR DANGEROUSOPERATION

Do not use unapproved replacement or accessory parts.

When servicing the controls, label all wires prior to

disconnecting them to prevent wiring errors.

Do not attempt to repair or replace any part of the boiler,

unless it is specifically recommended in this manual. For all

other service, contact an authorized technician or licensed

professional. Improper adjustments, alterations, service, or

maintenance may lead to property damage, personal injury,

or death and will void your warranty.

NOTICE:BOILERDAMAGE

Do not turn on the boiler unless the water and gas supplies

are fully opened. Failure to do so may damage the boiler.

This boiler has been approved for use in the USA and Canada only.

Using the boiler in any other country will void the manufacturer's

warranty.

User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

2 Front Panel

2.1 Digital Display and Icons

The digital display and icons on the front panel provide important information

required for the operation of the boiler. Refer to the table below for detailed

information.

Figure 1

Icon Description

ADigital display

Displays water temperature, error codes, etc.

BSpace heating mode

Indicates space heating mode operation.

CDHW mode

Indicates DHW mode operation.

DPressure

Indicates the pressure in the boiler.

ERPM

Indicates revolutions per minute (RPM).

FFreeze protection mode

Indicates freeze protection mode operation.

GOutdoor reset mode

Indicates ambient temperature sensor operation.

HCombustion

Indicates gas burner operation.

IError

Indicates error.

Table 2

2.2 Buttons

Using the buttons on the front panel, you can turn the boiler on or oﬀ, adjust the

water temperature, and change modes to monitor the operation status. Refer to the

table below for detailed information.

Figure 2

Icon Description

APower

Turns the boiler on or oﬀ.

BMode

Changes the mode.

CUP

Increases the temperature.

DDown

Decreases the temperature.

Table 3

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User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

3 Operating the Boiler

3.1 Turning the Boiler On or Off

To turn the Boiler on or oﬀ, press the button.

Figure 3

When the boiler is on, the water temperature which has been set recently will

appear on the digital display.

3.2 Setting the Space Heating Temperature

WARNING:SCALDHAZARD

If your household includes children, or elderly or disabled

individuals, consider using a lower temperature setting.

To set the space heating water temperature:

1. Press the MODE button until the icon turns on.

Figure 4

2. Press the or buttons until the desired temperature appears on the

digital display.

Figure 5

Temperaturerange Adjusting the water temperature

82–180°F (Fahrenheit mode) 2°F increments

27–82°C (Celsius mode) 1°C increments

Table 4

User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

3.3 Setting the DHW (Domestic Hot Water) Temperature

WARNING:

Water above 120°F (50°C) can cause instant scalding,

severe burns, or death.

To adjust the water temperature:

1. Press the Mode button until the icon turns on.

Figure 6

2. Press the or buttons until the desired temperature appears on the

display.

Figure 7

Temperaturerange Adjusting the water temperature

82–180°F (Fahrenheit mode)

31–50°C (Celsius mode) 2°F increments

1°C increments (31–45°C) & 46, 48, 50°C

130°F, 140°F

55°C, 60°C 10°F or 5°C increments

Table 5

To change the temperature over 120°F, hold down button for 5

seconds to unlock.

3.4 Viewing Basic Information

To turn the boiler on, press the button.

Figure 8

To view information about the boiler, press the MODE and buttons for 5

seconds.

Figure 9

Press the MODE button to switch between the information types.

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User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

3.4.1 H0 mode

This is the mode for checking the previous error.

H0 and the previous error (example: A6) will be displayed repeatedly on

the screen.

Figure 10

3.4.2 H1 mode

This is the mode for checking the most recent error.

H1 and the most recent error (Example : A2) will be displayed repeatedly

on the screen.

Figure 11

3.4.3 H2 mode

This is the mode for checking the current error.

H2 and the current error (Example : A3) will be displayed repeatedly on

the screen.

Figure 12

3.4.4 H3 mode

This is the mode for checking the current pressure in the system.

H3 and the current pressure in the boiler (Example : 25) will be displayed

repeatedly on the screen.

The pressure unit is PSI.

Figure 13

10 |

User Manual

Singular Combi Boiler - BTC 439003302 A (2021/03)

3.4.5 H4 mode

This is the mode for checking the current number of revolutions of the fan.

H4 and the current number of revolutions of the fan (Example : 3600) will

be displayed repeatedly on the screen.

The unit is rpm.

Figure 14

3.4.6 H5 mode

This is the mode for checking the output voltage of the fan.

H5 and the output voltage (Example : C5) will be displayed repeatedly on

the screen.

Figure 15

3.4.7 H6 mode

This is the mode for checking the current exhaust gas temperature.

H6 and the current exhaust gas temperature (example: 120) will be

displayed repeatedly on the screen.

The unit is °F.

Figure 16

3.4.8 H7 mode

This is the mode for checking the current hot water temperature.

H7 and the hot water temperature (example: 100) will be displayed

repeatedly on the screen.

The unit is °F.

Figure 17

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