Icma 983 – 980 | Electrothermic on-off actuator normally closed – Complies with the CE norm

NORMALLY CLOSED electrothermic actuators are ON-OFF electrical devices
that can be installed on ICMA products with thermostatic option: distribution
manifolds, zone valves and fan coil valves.
The electrothermic actuators automatically intercept the heat transfer
fluid in the heating/cooling systems and can be controlled by a simple room
thermostat.
The electrothermal actuators of this range are equipped with a valve opening
/closing indicator as well as a quick-coupling system that facilitates installation
and maintenance.
Power supply 230 V or 240 V in alternating current.

Once a NC actuator is installed on an ICMA thermostatic valve, the shutter slides
down and closes the heat transfer fluid flow in the circuit.
– WHEN VOLTAGE IS APPLIED TO THE ACTUATOR, THE CONTROLLED VALVE
OPENS
When voltage is applied to the actuator, the internal thermostatic element heats
up, expands and with a linear movement of the shutter determines the opening of
the controlled valve and the flow of the heat transfer fluid to the circuit.
– WHEN VOLTAGE IS SHUT OFF THE ACTUATOR, THE CONTROLLED VALVE
CLOSES
When voltage is shut off the actuator, an inner spring brings it back to closing
position, thus closing the controlled valve and the flow of the transfer fluid in the
circuit.
OPEN/CLOSE INDICATOR
The actuator is provided with a RED INDICATOR on the top of the knob (see picture
aside) which moves with the valve opening/closing:
– RED INDICATOR fully plugged in the actuator > CLOSED VALVE
– RED INDICATOR out of the actuator for about 3,5 mm > OPEN VALVE

Electric supply: 24V / 230V
Frequency: 50÷60 Hz
Starting current: 0.2 A (230V) / 0.3 A (24V)
Working current: 8 mA (230V) / 70 mA (24V)
Running power consumption: 2W
Type of movement: Linear
Actuator stroke: 5 mm
ICMA valves stroke: 3,5 mm
Operation time: approx 90 sec
Complete opening time: approx 3 min
Complete closing time: approx 4 min
Dynamic force: 100 N
Operating temperature: 0°C ÷ 50°C
Storage temperature: -25°C ÷ +60°C
Valve connection: M28x1,5 / M30x1,5
Connecting cable: Flameproof – Bipolar
Connecting cable length: 2×0,5 mm² L= 1 m
International protection rating: IP 53
Electrical insulation class: Class II