Ariston EP 10 UR 2 KW Manual page 7

Fig.. 2
EP 10/15
Dielectric
junctions
Hot
Fig. 3
EP 30 R 3KW
Temperature & pressure
relief valve (7 bar/90˚C)
Tundish
Discharge to drain
Hot
2) Using a set of expansion controls
(Fig. 2 & 3).
Expansion vessel
(charge at set 3.5 bar)
Pressure relief valve
(6 bar)
Cold
Pressure relief valve
(charge set at 3.5 bar)
Dielectric
junctions
Cold
If it is not possible to accommodate the expansion in the system pipe work,
it is then necessary to use a set of expansion controls. These comprise of
an expansion vessel and non-return valve (Kit A) and generally a pressure
reducing valve (Kit B). It is however possible to use Kit A without Kit B, but
the mains water pressure must never reach over 3.5 bar for the expansion
vessel to operate correctly. Therefore if the value of mains water pressure
cannot be guaranteed Kit B should be installed.
Nearest cold water
Pressure reducing valve
draw-off
(set at 3.5 bar)
Non-return
valve
Discharge
(6 bar)
Expansion vessel
Nearest cold water
draw-off
Non-return
valve
Isolating valve
(fixed jumper or
1/4 turn ball type)
Cold
water
mains
Supply to other parts
of plumbing system
Pressure reducing valve
(set at 3.5 bar)
Isolating valve
(fixed jumper or
1/4 turn ball type)
Supply to other parts
of plumbing system
Cold
water
mains
5