Bedienungsanleitung Bosch Compress 3400i AWS (Seite 4 von 44) (Englisch)

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Regulations

Compress 3400i AWS – 6721852066 (2023/01)

HHandover to the user

When handing over, instruct the user how to operate the heating system

and inform the user about its operating conditions.

▶ Explain how to operate the heating system and draw the user's

attention to any safety relevant action.

▶ In particular, point out the following:

– Modifications and repairs must only be carried out by an approved

contractor.

– Safe and environmentally compatible operation requires

inspection at least once a year and proper cleaning and

maintenance.

▶ Point out the possible consequences (personal injury, including

danger to life or material damage) of non-existent or improper

inspection, cleaning and maintenance.

▶ Leave the installation instructions and the operating instructions with

the user for safekeeping.

1.2.1 Refrigerant

HRefrigerant R32

▶ This appliance is filled with refrigerant R32. If refrigerant gas gets

into contact with fire, it may generate a toxic gas or fire.

▶ Do not let any other substance than the specified refrigerant enter

the refrigerant circuit.

▶ Ensure that the refrigerant pipe is connected before running the

compressor.

▶ Be aware that refrigerant may not contain any odour.

▶ Read all safety instructions for handling flammable refrigerants

provided with this appliance in a separate document.

HInstallation, commissioning and service

▶ Do not smoke and make sure that any other possible ignition sources

are kept way from the working area. Ensure that the installation area

is adequately ventilated.

▶ Do not pierce or burn.

▶ This appliance must be stored in a room without continuously

operating ignition sources (e.g. open flames, operating gas or

operating electric heater).

▶ Prior and during installation, make sure that there are no refrigerant

leaks using an appropriate refrigerant detector that is adequately

sealed and intrinsically safe (i.e. no sparking). Never use potential

sources of ignition to search for refrigerant leaks. A halide torch (or

any other detector using a naked flame) may not be used. If a

refrigerant leak is detected, ventilate the room immediately.

▶ When performing any hot work, a dry powder or CO2 fire extinguisher

should be kept ready.

▶ Wear protective gloves during installation.

▶ Do not use means to accelerate the defrosting process or to clean the

appliance, other than those recommended by the manufacturer.

HMaintenance

▶ When changing electrical components assure that these correspond

with the correct specification. Maintenance and service guidelines

must always be followed.

▶ Before any repair and maintenance procedure, an initial safety check

and component inspection procedures should be performed to

check that:

– Capacitors are discharged.

– All electrical components are switched off and wiring is not

exposed.

– Earth bonding continuity is ensured.

▶ Do not connect any electrical supply to the circuit if a fault that can

compromise safety is detected.

2Regulations

This is an original manual. This manual may not be translated without the

approval of the manufacturer.

Follow the directives and regulations given below:

• Local provisions and regulations of the electricity supplier and

corresponding special rules

• National building regulations

•F-Gas regulation

•EN 50160 (Voltage characteristics of electricity supplied by public

electricity networks)

•EN 12828 (Heating systems in buildings - Design for water-based

heating systems)

•EN 1717 (Protection against pollution of potable water installations

and general requirements of devices to prevent pollution by

backflow)

•EN 378 (Refrigerating systems and heat pumps - Safety and

environmental requirements)

2.1 Water quality

Water quality in the heating system

Heat pumps operate at lower temperatures than other heating systems

which means that the thermal de-airing is not as effective and oxygen

levels are never as low as with a system incorporating an electric/oil/ gas

boiler. This means that the heating system will be more susceptible to

corrosion when exposed to aggressive water.

Preventive actions are required if the heating system require recurrent

filling or where a heating water sample don’t show clear water.

Preventive actions can be to supplement the heating system with a

magnetite filter and a de-airing valve.

Actions when the heating system requires recurrent filling:

▶ Check that the volume of the expansion vessel is sufficient to the

heating system volume.

▶ Replace the expansion vessel.

▶ Check the heating system for leaks.

A system separation with the help of a heat exchanger may be required if

the limits in table 3 can not be achieved.

Do not use any water additives except for a non-toxic pH-enhancer

and keep the water clean.

The limits stated in table 3 are required to ensure the output data and

operation of the heat pump throughout its entire service life.

Table 3 Water quality

Additional water treatment to prevent lime-scale deposits

A poor quality of the heating water promotes the formation of sludge and

lime-scale. This can lead to malfunctions and damage of the heat

exchanger in the heat pump. According to the current guideline VDI

2035 “Prevention of damage in water heating installations” and

depending on the degree of hardness of the filling water, the system

volume and the total output of the system, water treatment may be

required to avoid damage due to the formation of lime-scale.

Water quality

Hardness <3 °dH

Oxygen content <1 mg/l

Carbon dioxide, CO2<1 mg/l

Chloride ions, CL-<250 mg/l

Sulphate, SO4<100 mg/l

Conductivity <350 μS/cm

pH 7,5 – 9

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