2
0814EN November 2016
T
hermo
-
elecTric
acTuaTors
T
hermo
-
elecTric
acTuaTors
N
ormally
o
peN
r478, r478m
Warning.
• The actuator case cannot be disassembled and should never be
opened.
• Tampering immediately voids the warranty.
• The power wire is not replaceable; if the cable is damaged, replace
the actuator.
• Electrical connections must be carried out by qualified personnel
and voltage-free after carefully verifying the voltage which must
comply with the one specified.
• Connection of power wires to the fix distribution network must be
performed in a safe manner as provided for by the Technical Rules in
force in the Country of use.
• Giacomini S.p.A. will not be held responsible for damages suffered
by individuals or objects for misuse of the product.
Dimensions
C
D
A B
A [mm]
B [mm]
C [mm]
D [mm]
68
65
51
37
Electrical data
Installation
R478 and R478M thermo-electric actuators may be installed on
thermostatizable valves and/or manifolds with Giacomini standard fittings,
using the special toothed ring provided with the actuators.
They can be installed horizontally or vertically, but not upside down with the
indicator pointing downwards.
To install the actuators on valves and/or manifolds, follow the steps below:
C
1
Install the toothed ring
(C) on the Giacomini standard
connection valve and/or manifold
pushing down.
Connect the thermo-electric
actuator to the ring.
15°
2
Turn the thermo-electric
actuator by 15° clockwise till you
hear a locking click (to remove
the actuator, turn by 15° in
anticlockwise direction).
3
Electrically connect the
actuator according to the
electrical diagrams.
