Bosch CONDENS 5000W User manual

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 (2019/03) NZ/AU

Contents
Condens 5000 W – 6720644144 (2019/03)
2
Contents
1 Explanation of symbols and safety instructions . . . . . . . . . . . . . . . . . . . . . 3
1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Product details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Explanation of model code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Preparing the appliance for use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Turn on the gas service cock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Turn on the isolators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Opening the control panel cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.4 Check the central heating system pressure . . . . . . . . . . . . . . . . . . . 14
3.5 Top up the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Overview of controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Switching the appliance on/off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3 Starting the central heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.4 Setting the heating control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.5 Appliances with hot water cylinder: setting the hot
water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
4.6 ZWB appliances - setting hot water temperature . . . . . . . . . . . . . . . 26
4.7 Summer mode (central heating off, DHW only) . . . . . . . . . . . . . . . . 28
4.8 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.9 Holiday mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.10 Further displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5 Carry out thermal disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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Condens 5000 W – 6720644144 (2019/03)
Explanation of symbols and safety instructions
6 Tips on saving energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10 Operating instructions quick reference . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
1 Explanation of symbols and safety instructions
1.1 Explanation of symbols
Warnings
In warnings, signal words at the beginning of a warning are used to indicate the type
and seriousness of the ensuing risk if measures for minimising danger are not taken.
The following signal words are defined and can be used in this document:
•DANGER indicates that severe or life-threatening personal injury will occur.
•WARNING indicates that severe to life-threatening personal injury may occur.
•CAUTION indicates that minor to medium personal injury may occur.
•NOTICE indicates that material damage may occur.
Important information
This symbol indicates important information where there is no risk
to people or property.

Explanation of symbols and safety instructions
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4
Additional symbols
1.2 General safety instructions
Instructions for the target group
These operating instructions are intended for the
heating system user.
All instructions must be observed. Failure to comply
with instructions may result in material damage and
personal injury, including possible loss of life.
▶ Read and retain the operating instructions (heat
source, heating controller, etc.) prior to operation.
▶ Observe the safety instructions and warnings.
Determined use
The product may only be used for the heating of boiler
water and for DHW heating.
Any other use is considered inappropriate. We
assume no liability for damage occurring due to non-
permitted use.
Symbol Explanation
▶ a step in an action sequence
a reference to a related part in the document
• a list entry
– a list entry (second level)
Table 1

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Explanation of symbols and safety instructions
If you smell gas
A gas leak could potentially cause an explosion. If you
smell gas, observe the following rules.
▶ Prevent flames or sparks:
– Do not smoke, do not use a lighter or strike
matches.
– Do not operate any electrical switches or unplug
any equipment.
– Do not use the telephone or ring doorbells.
▶ Turn off the gas supply at the main shut-off valve or
at the gas meter.
▶ Open windows and doors.
▶ Warn your neighbours and leave the building.
▶ Prevent anyone from entering the building.
▶ Move well away from the building: call the
emergency services and the gas supplier.
Danger to life from poisoning by flue gas
There is a danger to life from escaping flue gas.
▶Never modify any parts through which flue gas is
routed.

Explanation of symbols and safety instructions
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6
If flues are damaged or leaking, or if you smell flue gas,
observe the following rules.
▶ Switch off the heat source.
▶ Open doors and windows
▶ Warn your neighbours and leave the building
immediately.
▶ Prevent third parties from entering the building.
▶ Notify an approved contractor.
▶ Have any defects rectified.
Danger to life from carbon monoxide
Carbon monoxide (CO) is a poisonous gas, which
arises during the incomplete combustion of fossil
fuels such as oil, gas or solid fuels.
Dangers arise, if carbon monoxide escapes from the
heating system due to a fault or a leak and collects
unnoticed in enclosed spaces.
You can neither see, taste nor smell carbon monoxide.
To avoid danger from carbon monoxide:
▶ Have the heating system inspected and serviced
regularly by an approved contractor.
▶ Use a CO detector, which gives an alarm in good
time if CO escapes.
▶ If you suspect a CO leak:

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Condens 5000 W – 6720644144 (2019/03)
Explanation of symbols and safety instructions
– Warn your neighbours and leave the building
immediately.
– Call an approved contractor.
– Have any defects rectified.
Inspection and maintenance
If there is a lack of cleaning, inspection or
maintenance, or if these are carried out incorrectly,
this may result in material damage and/or personal
injury, including possible loss of life.
▶ Have work carried out only by an approved
contractor.
▶ Have any defects rectified immediately.
▶ Have the heating system inspected once a year by
an approved contractor, and have any required
maintenance or cleaning work carried out.
▶ Have the heat source cleaned at least every two
years.
▶ We recommend that you enter into a contract
covering an annual inspection and needs-based
maintenance with an approved contractor.

Explanation of symbols and safety instructions
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8
Conversion and repairs
Improper modifications to the heat source or other
parts of the heating system can result in personal
injury and/or material damage.
▶ Have work carried out only by an approved
contractor.
▶ Never remove the casing of the heat source.
▶ Never carry out any modifications to the heat
source or to other parts of the heating system.
▶ Never close the outlet of the pressure relief valves.
Heating systems with DHW cylinder: During heat-
up, water can escape from the pressure relief valve
of the DHW cylinder.
Open flue operation
The installation location must be adequately
ventilated, if the heat source draws its combustion air
from the room.
▶ Never cover or reduce the size of ventilation
openings in doors, windows and walls.
▶ Consult a contractor to ensure that ventilation
requirements are met:
– If structural modifications are made (e.g.
replacing windows and doors)

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Condens 5000 W – 6720644144 (2019/03)
Explanation of symbols and safety instructions
– If devices with an air discharge to the outside are
subsequently installed (e.g. extractor fans,
kitchen fans or air conditioning units).
Combustion air/ambient air
The air in the installation location must be free of
flammable or chemically aggressive substances.
▶ Do not store or use any highly flammable or
explosive materials (paper, petrol, thinners, paints
etc.) within the vicinity of the heat source.
▶ Do not store or use any corrosive substances
(solvents, adhesives, chlorinated cleaning agents,
etc.) within the vicinity of the heat source.
Condensate tube
Condensate is produced in this wall mounted gas
condensing boiler and removed via a condensate
tube. Modification or blocking of the condensate tube
is not permitted.

Product details
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2 Product details
2.1 Declaration of conformity
The design and operating characteristics of this product comply with the European
and national requirements.
The CE marking declares that the product complies with all the applicable
EU legislation, which is stipulated by attaching this marking.
The complete text of the Declaration of Conformity is available on the Internet:
www.bosch-climate.com.au.
2.2 Explanation of model code
Z Central heating appliance
S Cylinder connection
W DHW heating
B Condensing boiler technology
30 Output up to 30 kW
37 DHW output up to 37 kW
-2 Version
A Fan-assisted appliance without draught hood
Condens 5000 W ZSB 30-2 A
ZWB 37-2 A
Table 2

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Condens 5000 W – 6720644144 (2019/03)
Preparing the appliance for use
3 Preparing the appliance for use
3.1 Turn on the gas service cock
▶ Using 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

Preparing the appliance for use
Condens 5000 W – 6720644144 (2019/03)
12
3.2 Turn on the isolators
▶ Using 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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Condens 5000 W – 6720644144 (2019/03)
Preparing the appliance for use
3.3 Opening the control panel cover
Fig. 3
6 720 612 660-01.2R

Preparing the appliance for use
Condens 5000 W – 6720644144 (2019/03)
14
3.4 Check the central heating system pressure
The normal operating pressure is 1 - 2 bar.
If a higher setting is required, you will be informed by your installer.
Fig. 4
6 720 644 144-03.1O
1
0
2
3
4
bar

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Condens 5000 W – 6720644144 (2019/03)
Preparing the appliance for use
3.5 Top up the heating system
The way in which the heating system is topped up is different on every system.
Therefore, you should ask your installer to show you how it is done.
Maximum pressure of 3 bar at maximum heating water temperature must not be
exceeded (safety valve will open).
CAUTION: Risk of damaging the appliance.
▶ Only top up the heating system when the appliance is cold.

Operation
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4 Operation
These Operating Instructions apply only to the boiler.
Depending on the heating controller used, some functions may be controlled
differently.
The following possibilities for controlling the heating system may be employed:
• weather-dependent controller built into the boiler page 18, item 7.
• weather-dependent controller external to the appliance
• room thermostat
Therefore, please read the operating instructions for the heating
controller used.
Page 39 contains brief operation instructions. You can fold this
outwards and push the operating instructions into the appliance
facia for safekeeping.

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Condens 5000 W – 6720644144 (2019/03)
Operation
Fig. 5
max
6 720 613 086-04.1O

Operation
Condens 5000 W – 6720644144 (2019/03)
18
4.1 Overview of controls
Fig. 6
6 720 644 144-04.1O
1819
reset 10
11
12
eco
15161714
4
3
2
5
1
6
8
79
20
13

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Condens 5000 W – 6720644144 (2019/03)
Operation
[1] Flow temperature control
[2] DHW temperature control
[3] Chimney sweep button
[4] Service button
[5] Burner ON indicator
[6] Main switch
[7] Here, a weather-compensated control unit or a time switch (accessories) can
be plugged in
[8] Display
[9] Pressure gauge
[10] reset button
[11] eco button
[12] Holiday button
[13] Drain from pressure relief valve (heating circuit)
[14] Gas tap
[15] CH return isolator
[16] Filling loop (ZWB)
[17] Cold water tap (ZWB),
cylinder return (ZSB)
[18] DHW connection (ZWB),
cylinder flow (ZSB)
[19] CH flow isolator
[20] Condensate hose

Operation
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20
4.2 Switching the appliance on/off
Switching on
▶ Switch appliance on at the main switch.
The display shows the heating water flow temperature.
Fig. 7
Switching off the appliance
▶ Switch appliance off at the main switch.
The display goes out.
▶ If the appliance is to be switched off for a longer period of time: observe correct
frost protection procedures (Section 4.8).
If the display shows alternately with the flow temperature,
the appliance will operate with the lowest output for 15 minutes.
max
1
2
34
5
6
6 720 613 896-05.1O