Immergas Zeus Superior - Motorized 3-Way Valve

8
STZSkW ed 12/07 ZEUS Superior kW
Technical DocumentationTechnical Documentation
Motorized 3-way valve.
e electric 3-way valve operates on the primary circuit re-
turn and, according to the type of request (DHW or central
heating), it either directs hot water to central heating system
or storage tank coil.
Such operation depends on the position of the shutter (5),
which either closes the way toward the system opening the way
toward the storage tank (DHW position) or vice-versa (central
heating posi tion).
e shutter (5) can be shifted to either position by powering
the motor (1).
e hydraulic part consists in a group made of composite
material (2) (which includes the pump), driven by a motor (1)
which shifts the valve as necessary.
Operation.
When central heating or DHW position is required, the motor
(1) is switched on by the P.C.B.
Every 180° turn of the motor, shifts the shutter (5) and either
compresses (central heating position) or releases (DHW position)
the shutter opposing spring (4).
Both the spring (4) and the shutter (5) are located inside the
3-way cartridge (3).
When the requested position is reached, it alternatively opens
and closes one of the two limit micro-switches (6) inside the
motor casing (1).
Such procedure makes it possible for disconnection of power
supply to the motor, locking the motor in the position it is in
and enable motor function only when a dierent request is
received (DHW or central heating request).
PUMP
RETURN
SYSTEM
RETURN
COIL
RETURN
Storage
tank coil
return
Pump
ow
System
return