20
Installation instructions
4
6
8
5
6
7
3
5
2
1
2
S ONDA DI R ITOR NO
9
10
1
11
fig. 18
Solid fuel fired boilers must be installed with the safety
devices foreseen by relevant laws in force.
For this purpose, AIREX boilers are fitted with a safety heat
exchanger.
See also chap. 3.7.
Connect the thermal discharge valve (pos. 1) and insert the
probe in the relative bulb holder (pos. 2).
The thermal discharge valve may be mounted either on the right
or on the left as long as the probe can be inserted in the specific
bulb holder.
It is recommended to convey the discharge.
Remember that for solid fuel boilers, due to the thermal inertia
of the fuel, the installation of the thermal discharge valve is
mandatory.
SCARICO
1
2
ALIMENTAZIONE
fig. 19
Recirculation kit
For the correct operation of the AIREX range of boi-
lers, it is necessary to foresee a recirculation pump,
to prevent a low temperature return, which could
compromise the life of the boiler.
UNICAL, to help its customers, has therefore
developed a hydraulic kit for recirculation that
enhances the function of the circulating water in the
boiler.
This kit is supplied as an option and is available by
indicating the model of your boiler.
FEED
DRAIN
RETURN PROBE