16
Condensing boiler is equipped with low energy pump with a PWM driving Wilo Yonos Para RS 15/7.5. Modulating
pump is controlled by the control unit of the boiler according to the chosen strategy.
The connection to the heating system, HW and gas is carried out through ball valves.
Fig.
№
. 10
Wilo Yonos Para RS 15/7.5 pump characteristics
7.2
Gas connection
Before connecting the gas pipeline to the boiler, the gas pipeline should be tested and checked. After the boiler
connection to the gas pipeline, all gas connections gas must be re-tested by a gas detector or foam solution. Inlet
natural gas pressure is 2 kPa (20 mbar).
7.3
Connection to the mains
The boiler is equipped with a movable mains supply and a plug. According to
Č
SN EN 60 335–1 ed. 2 Art.
7.12.4, the boiler must be positioned so that the plug is accessible.
Near the boiler, a socket 230 V/50 Hz must be placed at the distance of 1.5 meters. The socket must comply with
applicable regulations and must be checked.
7.4
Condensate drain
To drain condensate, a built-in siphon connected to a sewerage overflow is used. Before the boiler commissioning,
check whether the condensate is drained. Size of a waste PVC pipe is of Ø 16 mm.
The condensate pH is 4.5 and it can be drained into the sewer system without treatment. The boiler condensate
drain must be made so as to not prevent continuous condensate drain.
7.5
Flue gas exhaust
The boiler is made in the version B or C according to the way of flue gas exhaust and combustion air inlet. Gas
appliances for the version B suck the combustion air from the boiler room. Appliances for the version C suck the
combustion air from the outside or from the space outside the boiler room.
The boiler is supplied in a standard version. The boiler flue gas exhaust is not part of the boiler supply. It is
necessary to use special piping intended for condensing boilers with a wall thickness of 1.5 mm. It is necessary to
keep a 3% inclination to the boiler. Pressure loss for the flue gas exhaust must not exceed 150 Pa.
Glue gas exhaust and air inlet including their lengths shall be made by a designer in the technical
documentation.
The boiler must be installed only with a wind protective device which meets the requirements of EN 1856-1 (See
Annex N).
The boiler must be installed with the necessary accessories (pipeline for the combustion air supply and flue gas
exhaust).
