201-2001 heat interface unit
6
Technical Specification - Actuator of 2-port Control Valve
Materials: - base and cover: PC G 10
Synchronous motor: Normally closed
Supply: 230 V - 50 Hz
Power consumption: 6.5 W; 7 VA
Opening time: 70 to 75 s
Closing time: 5 to 7 s
Microswitch contacts rating: 0.8A
Protection class: IP 40
Max. ambient temperature: 40˚C
Complies with Directive: 72/23/EC and
89/336/EC
Length of power cable: 95 cm
Operation
With the electrical supply off, the actuator keeps the valve in the
closed position.
When a temperature thermostat or other electrical device switches
the supply on, the actuator moves the disc in the valve into the open
position.
When the supply is turned off, the valve closes again due to the
action of a return spring.
Construction
Auxiliary microswitch
The actuator is fitted with a microswitch to operate devices such as,
for example, a circulating pump. The microswitch comes on when
the valve is 60% open.
Manual opening
The valve can be opened manually by moving
the lever to the lock open position. When the
power is restored the manual control is
automatically overridden.
Clip on actuator
A rapid clip-on system makes it easy to remove the actuator from
the body of the valve for maintenance or replacement operations.
Operation
The actuator is fitted with a special mechanism for gradual
movement of the valve disc which prevents udder and vibration due
to the inertia of the gear motor.
Removing the actuator
1 Set the lever on the side of the actuator to the open position (or
to manual opening).
2 Press the open button on the side of the actuator and remove
the actuator.
Fitting the actuator
1 Set the lever on the side of the actuator to the open position (or
manual opening).
2 Check that the actuator is correctly positioned with respect to
the valve as determined by the different dimensions of the
operating stem and the locking pin.
3 Press the open button fully down. Clip on the actuator and
release the button.
Technical Specification - Differential Pressure Control Valve
Medium: water, glycol solution
Max. percentage of glycol: 50%
Max. working pressure: 16 bar
Temperature range: -10 to 120˚C
Diaphragm max. differential pressure: 6 bar
∆p setting range: 50 to 300 mbar
5 to 30 kPa
Connections
Capillary tube connection size: G¹/
Tightening torque: 4 to 7 Nm
Length of capillary Ø3 mm 1.5 m
∆p indicator
The operation of setting the ∆p
differential regulating valve is
simplified by the presence of the
mobile indicator (1) and the
graduated scale (2) in mbar on the
valve knob.
Shutting off the flow and maintaining the ∆p setting
It is possible to isolate the circuit controlled by the differential
regulating valve.
The mechanism to stop the flow is built into the valve.
The circuit is shut off by inserting an
Allen wrench into the hole and
turning it fully clockwise.
This allows the flow to be shut-off for
system maintenance without having
to reset the valves after re-opening.
