15
Instructions for the installer
SCARICO
1
2
ALIMENTAZIONE
fig. 10
3.7 - CONNECTION TO SAFETY HEAT
EXCHANGER DRAIN
Solid fuel fired boilers have to be installed
with the safety devices foreseen by applicable
regulation and laws.
For this purpose the AIREX 2S boilers are
fitted with a safety heat exchanger.
On this safety heat exchanger the installer
must
fit a
heat
discharge valve
, whose control bulb has to be inserted in the
bulb holder placed onto the rear wall of the wood fired boiler.
The inlet and outlet connections can be inverted.
However we recommend that the valve be fitted on the cold
water inlet.
In correspondence of the safety heat exchanger outlet, we re-
commend fitting a drainage pipe with a funnel and siphon that
lead to an adequate drainage. The drainage has to be visible.
Warning!
In absence of this precautionary measure,
the eventual intervention of the heat dischar-
ge valve could cause damages to people,
animals or property. The manufacturer shall
not be held liable for any such injury and/or
damage.
MAINS
DRAIN
3.8 - RECIRCULATION PUMP
For correct boiler operation it is necessary to install a re-
circulation pump in the boiler.
The recirculation pump, supplied as an optional kit in two
different versions, basic or for buffer storage tank control,
will have to be connected as shown in figs. 19 and 20.
If the recirculation pump is not installed, besides limiting
the boiler’s life span, it will invalidate the warranty.
WARNING!
The hardness of the mains water supply
conditions the boiler’s life span.
Depending on the hardness of the of the
mains water supply the possibility of instal-
ling a water
softener has to be taken into consideration.
In hard water areas where the main water can
exceed 15°f total hardness, water treatment is
always recommended.
