Immergas HERCULES Condensing 26 2 E Manual page 12

Technical Documentation
Motorised 3-way valve.
It is an electric 3-way valve operating on he primary circuit
return that allows, according to request (DHW or CH), to
introduce boiler water into the CH system or the storage
tank coil.
This depends on the position of the shutter (5) which, closes
the passage towards the system opening it at the same time
towards the storage tank (DHW position) or vice versa (CH
position).
The shutter (5) is moved into both positions by powering the
motor (1).
The hydraulic part is made up from a group of composite
material (2) that also integrates the pump and is put into ac-
tion thanks to a motor (1) that causes movement according
to necessity.
Operation.
When it is necessary to reach the CH or DHW position, the
motor (1) is activated by the P.C.B.
Functioning of the motor leads to the movement of the shut-
ter (5) at every 180° rotation and compresses (CH position) or
leaves (DHW position) the shutter contrast spring to release
(4).
Both the spring (4) and the shutter (5) are situated inside the
3-way cartridge (3).
The hydraulic arrival at the requested position, alternatively
causes the opening and closure of one of the two end run micro
switches (6) organised inside the motor box (1).
This allows to remove voltage to the motor blocking it in the
position reached and to enable motor functioning only in the
presence of a different request (DHW or CH signal).
STHCkW ed 0409
Hydraulic
manifold
return
1
Storage tank
coil
return
PUMP
RETURN
COIL
RETURN
10
Technical Documentation
Pump
Flow
2
3
HYDRAULIC
MANIFOLD
RETURN
HERCULES Condensing Export
5
4