Overview:

 

To enable optimal room temperature control, combining energy savings with high comfort, electrothermal heads should be used on distribution manifolds, radiator thermostat valves, or fan coil valves.

 

Normally closed R473 and R473M electrothermal heads are characterized by absolutely silent operation, high durability due to the absence of mechanisms subject to wear, and sufficiently slow closing to prevent the occurrence of water hammer phenomena. The drive mechanism consists of wax bulbs controlled by low-power electric PTCs.

 

230V power supply version, 2-core cable.

 

Features:

• Product complies with the requirements of the EMC and B.T. Directives.
• No-voltage state: normally closed (N.C.)
• Quick-connect connection for standard Giacomini valves and/or manifolds
• Mechanical position indicator
• Linear motion
• Actuator working stroke: 2.4 mm
• Pollution degrees: II
• Rated impulse voltage: 4 kV
• Degree of protection: IP40
• Protection against direct contact by double insulation (Class II)
• Power supply cable: type H03 VV-F; usable length 1 m
• Opening and closing time at 20 °C: ~6 minutes
• Ambient temperature range of use: -5÷50 °C
• Storage ambient temperature range: -20÷65 °C
• Maximum temperature for luminaire mounting surface: 90 °C
• Housing material PBT self-extinguishing V0-UL94
• Normally open microswitch with closed valve (only for versions with limit switch R473M)
• Power consumption 2.5W
• Max inrush current <0.25A
• Absorbed current after 12 minutes <0.015A
• resistance 6300 ± 1800
• Power cable section 2 x 0.50 mm2