Bedienungsanleitung Spartherm Nova E H2O (Seite 12 von 28) (Englisch)

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GB 12

2.8 THERMAL DISCHARGE SAFETY DEVICE

As the heating of the Nova E H2O is not automatic, nor can it be quickly

shut-off, the hot water insert must be equipped with a thermal discharge

safety device in accordance with DIN 4751 - Part 2 and DIN EN 12828 to

avoid dangerous situations in the case of malfunction, such as a power

outage. For this, a safety device (safety heat exchanger) is integrated in

the Nova E H2O to prevent overheating. This safety device must not be used

as a water heater. The provided thermal discharge safety device (e.g. SYR,

type 3065) has been tested and approved for a minimum water throughput

of 900 kg/h. The connection can be executed in accordance with Fig. 2. The

sensor of the capillary tube must be pushed into the appropriately marked

connection opening of the Nova E H2O (into the sealed-in immersion sleeve)

and permanently fixed in place.

The following instructions must always be complied with for the installation,

so that the safety device can function:

• For the installation, the instructions in the installation and operating

manual for the thermal discharge safety device provided by the manu-

facturer must always be complied with!

• The fitting of the thermal discharge safety device must only be installed

in the flow line, so that when operated as intended, standing water is not

present in the safety heat exchanger.

• The fitting of the thermal discharge safety device must not be housed

in the hot area of the heating chamber (convection chamber) of the fire-

place system (max. ambient temperature 80°C). Select the position of

the fitting in accordance with the capillary tube length so that it is easily

accessible, should it be necessary to replace the fitting for example!

• At the cold water inlet, a flow pressure of at least 2.0 bar

must be available. This pressure must be constantly ensured.

The possibility of water network fluctuations must be excluded.

For example, this means that a mains voltage-dependent domestic water

supply is not approved!

A separate safety valve must also be installed, if such a safety valve is

installed at a different point in the entire system (comply with TRD 721!)

2.7 RETURN FLOW TEMPERATURE BOOST

The Nova E H2O must only be operated with a return flow boost. In operation,

the return flow temperature must be at least 60°C to prevent damage to

the boiler parts.

Likewise, sooting of the fireplace insert, as well as faster contamination

are also prevented. To ensure a temperature of at least 60°C, a circulation

pump/return flow temperature boost must be installed in such a manner that

it only starts up when a temperature of approx. 62°C has been reached. This

is ensured if a pump thermostat (Afriso, type GTK 7HD) is used. As there

is a danger of undershooting the dew point, a regulated return flow boost

must be installed. In this regard, the control variable - this equals the effec-

tive return flow temperature at the inlet of the water heat exchanger - is

detected and adjusted to the desired value.

The return flow temperature boost should be installed in the direct vicinity

of the heat generator, so that the phase of dew point undershooting at the

flue gas water heat exchanger is kept as short as possible. However, it must

be noted that with installation of the circulation pump within the heating

chamber, operating noises are perceptible.

Please note: For operating malfunctions or corrosion damage (sooting,

deposits, etc.) on the water heat exchanger or chimney, etc. that are

attributed to a missing return flow boost or non-effective return flow boost,

we can accept neither liability nor guarantee.

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