Bosch ZWB 37-2 A Manuale utente

Operating Instructions

Hydronic Gas Condensing Boiler

Condens 5000 W

6 720 613 085-00.1O

ZSB 30-2 A ...| ZWB 37-2 A ...

6 720 644 144 (2010/09) NZ/AU

Contents

6 720 644 144 (2010/09)

Contents

1 Key to symbols and safety instructions . . . . . . . . . . . . . . 4

1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Product details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Explanation of model code . . . . . . . . . . . . . . . . . . . . 8

3 Preparing the appliance for use . . . . . . . . . . . . . . . . . . . . 9

3.1 Turn on the gas service cock . . . . . . . . . . . . . . . . . . 9

3.2 Turn on the isolators . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3 Opening the control panel cover . . . . . . . . . . . . . . 11

3.4 Check the central heating system pressure . . . . . . 12

3.5 Top up the heating system . . . . . . . . . . . . . . . . . . . 13

4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.1 Overview of controls . . . . . . . . . . . . . . . . . . . . . . . . 16

4.2 Switching the appliance on/off . . . . . . . . . . . . . . . . 18

4.3 Starting the central heating . . . . . . . . . . . . . . . . . . 19

4.4 Setting the heating control unit . . . . . . . . . . . . . . . 21

4.5 Appliances with hot water cylinder:

setting the hot water temperature . . . . . . . . . . . . . . 22

4.6 ZWB appliances - setting hot water temperature . . 24

4.7 Summer mode (central heating off, DHW only) . . . 26

4.8 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.9 Holiday mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.10 Further displays . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Contents

6 720 644 144 (2010/09)

5 Carry out thermal disinfection . . . . . . . . . . . . . . . . . . . . . 30

6 Tips on saving energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

10 Operating instructions quick reference . . . . . . . . . . . . . . 38

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4| Key to symbols and safety instructions

6 720 644 144 (2010/09)

1 Key to symbols and safety

instructions

1.1 Explanation of symbols

Warning symbols

Signal words indicate the seriousness of the hazard in terms of the

consequences of not following the safety instructions.

•NOTICE indicates possible damage to property or equipment,

but where there is no risk of injury.

•CAUTION indicates possible injury.

•WARNING indicates possible severe injury.

•DANGER indicates possible risk to life.

Safety instructions in this document are framed

and identified by a warning triangle which is

printed on a grey background.

Electrical hazards are identified by a lightning

symbol surrounded by a warning triangle.

Key to symbols and safety instructions | 5

6 720 644 144 (2010/09)

Important information

Additional symbols

Notes contain important information in cases where

there is no risk of personal injury or material losses

and are identified by the symbol shown on the left.

They are bordered by horizontal lines above and

below the text.

Symbol Meaning

Ba step in an action sequence

Æa reference to a related part in the document or

to other related documents

•a list entry

–a list entry (second level)

Table 1

6| Key to symbols and safety instructions

6 720 644 144 (2010/09)

1.2 Safety instructions

If you smell gas

BTurn off gas tap (Æpage 16).

BOpen windows and doors.

BDo not operate any electrical switches.

BExtinguish any naked flames.

BLeave the building and telephone your gas supply utility and

authorised contractor from an outside phone.

If you smell flue gas from the appliance

BSwitch off the appliance (Æpage 16).

BOpen windows and doors.

BInform your heating contractor.

Installation and conversion

BThis appliance may only be installed or converted by an

approved installer.

BNever modify any parts of the flue system.

BIf the appliance has a type B.. flue system: Do not seal off or

reduce the size of air vents in doors, windows or walls. If

draught-sealed windows are installed, ensure there is an

adequate supply of air to the appliance for combustion.

Thermal disinfection

BRisk of scalding!

It is imperative to monitor operation at temperatures over

60 °C (Æpage 30).

Key to symbols and safety instructions | 7

6 720 644 144 (2010/09)

Risk of damage due to operator error

Operator errors can result in injury and damage to property.

BEnsure that children never operate this appliance unsupervised

or play with it.

BEnsure that only personnel who can operate this appliance

correctly have access to it.

Inspection/Maintenance

BWe recommend that you take out a contract to have the

system regularly serviced in order to ensure that it functions

reliably and safely.

BThe user is responsible for the general and environmental

safety of the system.

BOnly use genuine spare parts!

Combustible materials

BDo not store or use any combustible materials (paper,

thinners, paints etc.) in the vicinity of the appliance.

Combustion air/Ambient air

BKeep combustion air/ambient air free of corrosive substances

(e.g. halogenated hydrocarbons which contain chlorine or

fluorine compounds). In that way corrosion can be prevented.

8| Product details

6 720 644 144 (2010/09)

2 Product details

2.1 Intended use

The appliance may only be installed in sealed hot-water central

heating systems to EN 12828.

Using the appliance for any other purpose will be considered

incorrect use. Bosch accepts no liability for any damage resulting

from such use.

The commercial and industrial use of appliance to generate

process heat is not permitted.

2.2 Explanation of model code

ZCentral heating appliance

SCylinder connection

WDHW heating

BCondensing boiler technology

30 Output up to 30 kW

37 DHW output up to 37 kW

-2 Version

AFan-assisted appliance without draught hood

Condens 5000 W ZSB 30-2 A

ZWB 37-2 A

Table 2

Preparing the appliance for use | 9

6 720 644 144 (2010/09)

3 Preparing the appliance for use

3.1 Turn on the gas service cock

BUsing a screwdriver, turn the square tap handle so that the slot

is in line with the direction of flow.

Slot at right-angles to direction of flow = off.

Fig. 1

6 720 644 144-01 .1O

10 | Preparing the appliance for use

6 720 644 144 (2010/09)

3.2 Turn on the isolators

BUsing a screwdriver, turn the square tap handle so that the slot

is in line with the direction of flow.

Slot at right-angles to direction of flow = off.

Fig. 2

6 720 644 143-02.1O

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