Immergas EOLO Mini - Page 11

9
STEMkW Special ed 01/08 EOLO Mini kW Special
Technical Documentation
Technical Documentation
Exchanger
ow
D.H.W.
EXCHANGER
FLOW
Motorised 3-way valve.
It is an electric motor (1) connected to the 3-way unit (2) and
locked by a fork that allows, according to the request made
(d.h.w. or central heating), boiler water to ow into the central
heating system or in the d.h.w. plate exchanger.
is depends on the position of the shutter (4) which closes
passage to the system while simultaneously opening it to the
d.h.w. exchanger (d.h.w. position) or vice versa (central heating
position).
e motor (1) is made to work by the electronic P.C.B. and,
with each 180° rotation, the shutter (4) moves into both
positions.
e hydraulic part consists of a brass unit (2).
Operation in the central heating mode.
e shutter’s (4) counteracting spring (3) is not compressed
(central heating position), keeping passage to the d.h.w. plate
exchanger closed and passage to the system ow open.
Both the spring (3) and shutter (4) are located inside the 3-
way brass body (2).
Operation in the d.h.w. mode.
e standard position of the hydraulic unit is always in the
d.h.w. mode.
e electric motor (1) pushes the rod (5) to which the shutter
(4) is connected which closes passage to the system, simulta-
neously opening it to the d.h.w. plate exchanger, the shutter’s
(4) contrasting spring (3) is compressed (d.h.w. position).
Both the spring (3) and shutter (4) are located inside the 3-way
valve brass body (2).
EXCHANGER
FLOW
SYSTEM
FLOW
1
2
3
4
5
Exchanger
return
System
ow
D.h.w. ex-
changer ow