Terminal unit and
zone valve actuators
Rev. a 03/04 1 DBL157E
ISO 9000
CONTROLLI
MVT
CONTROLLI Division
16010 SANT’OLCESE Genova - Italy
Tel.: +39 01073061 Fax: +39 0107306870/871
APPLICATION
MVT actuator is designed to provide, with V.T and V.BT valve
bodies, floating control of hot/cool water in two/four-pipe fan-
coil units, zone and solar plants, reheat coils and dehumidifi-
cation batteries.
ACCESSORIES
MVT44C1 Cable for MVT441 3-wire 1,5 m (CEI 20-22/II)
N4149
OPERATION
POSSIBLE COMBINATIONS AND
CONNECTIONS
MVTactuatorsaretobeusedwithCONTROLLIVST,VMT,VTT,
VSBT,VMBTvalves.
The MVT4. series can be connected to any 3-position control-
ler, with characteristics corresponding to details included in
the paragraph “TECHNICAL CHARACTERISTICS”.
The MVT5. series is standard proportional as indicated on table
1.
Due to the presence of the magnetic clutch, the actuator could
be continuously powered up without damages but, for life in-
crease and energy saving, it is highly reccomended to use a
controller equipped with a cut-off function (suggested timing
120% of stroke time).
MANUFACTURING CHARACTERISTICS
The actuator consists of a base and a housing made of syntetic
materials which contain motor, gear box, magnetic coupling,
valve driving screw spindle.
A ring nut M30x1.5 is placed on the lower part; it allows an easy
coupling to the valve without special tools.
The actuator is equipped with a cable for 3-wire electrical con-
nection. It requires no maintenance.
TECHNICAL CHARACTERISTICS
Power supply 24 V ~ +10%
Consumption 0,5VA (MVT4.)
1VA (MVT5.)
Frequence 50/60 Hz
Stroke timing 100 s for V.T valves having
5,5 mm stroke (at 50 Hz)
Speed 18 s/mm at 50 Hz - 15 s/mm
at 60 Hz
Force 200 N (UNI 9497)
Stroke 6,5 mm
Temperature:
- working -5T55 °C
- storage -25T65 °C
Protection class III (IEC 950)
Connecting cable 3-wire 1,5 m (CEI 20-22/II)
Protection degree IP43 CEI EN 60529
Weight 0,2 Kg.
The product conforms to EMC 89/336 directive with
reference to the below-mentioned standards:
for emission EN 50081-1 for immunity EN 50082-1
INSTALLATION AND MOUNTING
The actuator can be mounted in the positions indicated below.
Before assembling the actuator to the valve, remove the pro-
tection cap from valve and make sure that the actuator screw
spindle corresponds to the upper notch on the base plate (fac-
tory supplied position). Otherwise, it is advisable to consider
that, in order to mount the actuator on the valve correctly, the
force of the valve internal spring will have to be overcome.Then
it should be fixed by tightening the M30X1,5 ring nut on the
thread located on the valve body (Fig. 1).
Mounting positions allowed
MVT actuator is electric bidirectional.
The valve stem movement is produced by rotation of a screw
spindle connected, through a gear train, to a synchronous bidi-
rectional motor.
An internal magnetic hysteresis coupling limits the torque on
the valve stem, avoiding the usage of microswitches and pro-
tecting the actuator from overload.
PART
NUMBER CONTROL SIGNAL POWER SUPPLY
MVT44 3 position
MVT441 3 position
without cable
MVT56 proportional
0…10/6…10/1…5/2…10
4…7/6…9/8…11V-
MVT57 proportional
0…10V-
MVT56A proportional
4÷20 mA
24 V~
TABLE1
N4038
Perform the electrical connections in compliance with existing
rules (Fig. 2)
Through the slits located by the ring nut, it is possible to ob-
serve the valve stem movement.
With 24 V~ voltage between white (common) and brown the
actuator lowers the valve stem, between white (common) and
green the actuator lifts the valve stem.
