Bedienungsanleitung Spartherm Mini H2O (Seite 24 von 44) (Englisch)

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GB 24

2.6 SAFETY VALVE

In the direct vicinity of the H2O fireplace insert, a type-tested safety valve

(e.g. make Syr, type 1915) with an activation overpressure of max. 3.0 bar

must be mounted in the flow line. When installing, the manufacturer's

specifications (e.g. ambient temperature) of the safety valve must be taken

into account. A shut-off possibility must not be integrated in the system

between the safety valve and the H2O fireplace insert This could render

the safety device inoperable. Moreover, all necessary safety devices must

be integrated in the entire system in such a manner that safe operation is

ensured. 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 H2O fireplace insert must only be operated with a suitable return flow

boost. In operation the return flow temperature must be at least 55°C/60°C

(see „1.3 Technical data“). So that this temperature is ensured, a circulation

pump must be installed in such a manner that it only starts up if a water

temperature of 60-65°C has been reached in the heat exchanger. This must

be executed with the pump thermostat (included in the scope of delivery,

e.g. JUMO, heatTHERM, Afriso) (see „2.9 Thermal pump controller“). To

avoid temperatures below the local dewpoint and thus deposits on the water

heat exchanger, a regulated return flow temperature boost must always

be installed. The longer the pipelines between the return flow temperature

boost and the fireplace insert, the longer the time the temperature can be

below the dewpoint in the fireplace insert, because this heating water must

only be warmed at heating up. Consequently, it is recommended to install

the return flow temperature boost unit directly, however where it is easily

accessible, in the vicinity of the fireplace insert.

Please note: If there is no return flow temperature boost unit, or if the

return flow temperature boost is not functioning effectively, we can assume

2.4 MINIMUM CROSS SECTIONS - CONVECTION AIR

The minimum cross sections for convection air (supply air and recirculat-

ing air) in the cladding or in the heating chamber must be designed as

described in the technical data (chapter „1.3 Technical data“).

The Regulations of the German Tiled Stove and Air Heating Constructors

Association (TR-OL 2006) must always be taken into account.

The specification of opening sizes for convection air applies for air velocities of

0.75 m/s in fireplaces (hot-air systems or radiant heating). If a combination of

fireplace and closed system (hypocausts) is created, there are smaller openings

for supply air and circulating air, since the energy output via the heating cham-

ber surface should be considered.

2.5 VENTILATION AND DRAINING

A 1/2" draining possibility must be provided at the low point of the fireplace

insert and of the pipe system. To vent the water heat exchanger the vent

possibilities cited in Fig. 2a-2f must be available. In the direct vicinity of the

vent valve a sufficiently large opening must be provided in the lining where

the upper vent is used! On the other hand, the lower vent (in the area of the

connections on the rear) can be reached and used through the inspection

opening in the combustion chamber. After commissioning, the insert must

be vented several times because the heating water outgases due to the high

temperatures. It must be ensured at all times that the system is adequately

filled with water and vented. This must be particularly checked after longer

periods of system downtime.

The stipulations of TR-OL regarding the free cross-section of the vent open-

ings, as well as the maximum supply air temperatures of 75 °C must be

strictly complied with! Non-lockable recirculating air openings and supply

air openings are recommended to exclude the possibility of accumulated

heat within the combustion chamber!

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