Neutralising The Condensate; System Filling And Emptying; Frost Protection - Riello TAU Unit 140 Installation And Maintenance Manual

2.8.4

Neutralising the condensate

The N2 and HN2 neutralisation kits are available for condensate
neutralisation.
N2 TYPE NEUTRALISATION KIT
The N2 TYPE neutralisation units were designed for systems
equipped with the central heating plant condensate outlet trap
located lower than the boiler condensate outlet. This neutrali-
sation kits does not require electric connections.
Description
L - Width
H - Height
P - Depth
P
A
C
HN2 TYPE NEUTRALISATION KIT
The HN2 TYPE neutralisation units were designed for systems
equipped with the central heating plant condensate outlet trap
located higher than the boiler condensate outlet. This neutrali-
sation kits does require electric connections.
Description
L - Width
H - Height
P - Depth
Q.ty of granulate
P
A
C
Dimensions
400 mm
220 mm
300 mm
B
H
L
Dimensions
400 mm
220 mm
300 mm
25 kg
1,5 m
max
B
H
L
2.9

System filling and emptying

TAU Unit boilers require a filling pipe connected to the central
heating circuit return pipe.
9
All the necessary circuit shut-off and drain cocks must be
provided.
FILLING
Before starting to recharge, check that the drain valve, on the
system, is closed.
− Open the shut-off cocks for the water circuit
− Slowly fill until the pressure gauge reads, when cold, a
value of 1,5 bar
− Close the central heating circuit shut-off cocks.
RI
EMPTYING
Switch the electricity supply OFF at the system's main switch and
at the control panel before starting to empty the boiler.
− Close the CH circuit water shut-off cocks
− Connect a plastic tube to the hose barb of the drain valve
installed in the system and open it.
2.9.1 CH frost protection
The condensing thermal units TAU Unit feature an antifreeze
protection that is activated by the thermoregulator if the deliv-
ery water temperature drops below 5°C.
9
No special anti-frost additives are therefore needed, unless
the system is to be completely shut down for an extended
period of time.
9
If you do use anti-freeze in the system, make sure that it is
of the type that does not attack steel.
21
INSTALLATION