Riello TAU 150 UNIT, Руководство по установке и обслуживанию

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INSTALLER 33
CH FROST PROTECTION
FLUE GAS VENT AND COMBURENT AIR INTAKE
TAU UNIT
condensing boilers are open systems belonging
to class B23 – B23P. They must therefore be installed in
proper boiler rooms. All the standards applicable to this
type of installation must be respected.
Vents and intakes must be made in conformity to applica-
ble national, regional, and local standards. (In Italy refer to
UNI - CIG 7129/92 standard).
The combustion gases are cooled to a temperature near
that of the central heating return before they leave the boi-
ler body. This makes it possible to use plastic flue pipes
instead of metal ones, with significant savings in overall
installation costs.
To protect the vent pipes against possible damage
TAU
UNIT
boilers are equipped with a flue gas temperature
thermostat (as required by European standard EN 677).
b
Caution! Do not connect the vent flue directly to exi-
sting flues used to serve other appliances (cookers,
other boilers, etc.). Larger disused flues can never-
theless be used as ducts for routing the boiler's intake
and vent flues.
b
If the vertical section of vent flue is over 4 metres in
height, a condensate drain must be provided at its
bottom. This drain point must be connected to the boi-
ler's own condensate collection tank described in the
"Draining the condensate" section.
b
The horizontal sections of the vent flue must slope
down to the boiler at a gradient of at least 3%.
Maximum residual pressure in
flue gas vent
150 Pa
TAU UNIT condensing boilers are equipped with an
electronic frost protection system. This system starts up
the boiler if temperature drops below a certain threshold.
b
No special anti-frost additives are therefore needed,
unless the system is to be completely shut down for
an extended period of time.
b
If you do use anti-freeze in the system, make sure
that it is of the type that does not attack steel.