18
Installation requirements:
pressure vessel with the volume of at least 4% of the total water
charge
shape: cylindrical, type A. acc. to PN-91/B-02413-1-2
rectangular, type B, acc. to PN-91/B-02413-1-3
safety riser tube (RB) with inner diameter of:
40 mm for boilers rated up to 100 kW, inclusively
50 mm for boilers rated 120 to 160 kW
riser pipe (RW) with inner diameter of
25 mm for boilers rated up to 100 kW
32 mm for boilers rated 120 to 160 kW
overflow pipe RP
inner diameters as in the case of RW and RB
circulation pipe (RC) with inner diameter of 20 mm
venting pipe (RO) and signalling pipe (RS) with inner diameters of
15 mm
No fittings permitting complete or partial closure of flow may be
installed on RB, RW and RO pipes. The protective equipment and
pipes shall be protected against freezing.
2.7.2. Closed systems
Only
Unica Max
boilers, which are rated 80 and 100 kW may be operated
in closed systems. The thermal protection used by Moderator Sp. z o.o. protects
boilers rated up to 100 kW only.
In case of higher power ratings, a heat exchanger or another device
dissipating excess heat shall be used so that the maximum water temperature in
the boiler does not exceed 110
O
C. The protection shall be installed by the user
performing boiler connection works.
Installation of the boiler in a closed system without the
equipment to dissipate the excess heat is unacceptable.
Moderator boilers operating in closed systems must be equipped with air supply
system (designed by Moderator Sp. z o.o. for Moderator boilers - we advise against
installation of other air supply systems) a safety valve and additional thermal
protection permitting safe discharge of excessive thermal power. Muffs welded in the
upper jacket of the boiler facilitate installation of this equipment (items 13 and 14 on
fig. 1).