15
6.
Hydraulic Installation
* Chapter 12 (installation diagrams) includes diagrams illustrating the
range of possible connections that may be used in the installation of a
central heating system, with or without the feature of heating water for
domestic use;
* The pellet-run boiler comes equipped with a circulating pump, an
expansion tank (with a volume of 10 litres, in the case of the 18kW
model, and of 16 litres, in the case of the 24kW and 30kW models) with a
pre-charge pressure of 1.0 bar, as well as a 3 bar safety valve;
* Operating pressure is between 1 and 1.5 bars;
* To empty the unit, attach a "T-tube" with a tap to the outlet (connected
to the household sewage); the safety valve (3 bar) outlet
must also be connected to the household sewage;
* The heat transporting fluid must consist of water mixed with an anti-
corrosion, non-toxic product added in the quantity recommended by the
manufacturer. If there exists any risk of freezing in the space where the
boiler is installed, or within its fluid pipes, the installation engineer must
add the manufacturer's recommended quantity of anti-freeze agent to the
circulating fluid, in order to avoid freezing at the absolute minimum
expected temperature.
6.1. Operating mode for radiator/Buffer tank
IMPORTANT! The boiler is programmed to work directly for radiators,
in case you want to install the boiler with a buffer or AQS tank, we
recommend changing the temperature "OFF" of the circulation pump by
placing the same temperature as the deposit or 1 °C higher than this
temperature, should disable the "hYDRO Menu" modes "Modulating Pump"
Summary of Contents for SZM A 18 KW
Page 15: ...12 b c Figure 6 Examples of standard installations ...
Page 50: ...47 a b Figure 27 b and c a b ...
Page 82: ...79 Figure 68 Electrical diagram of the external silo s circuit board ...
Page 87: ...84 ...
Page 88: ...85 ...
Page 89: ...86 ...
