Accorroni W Technical Information Download Page 14

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Fig. 4

1.11 EXPLODED VIEW - WD version with ducts for ceiling installation

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mm and which has an adequate capacity, to
be used as a general switch to turn off the
units.

Insert the power supply cable through its bushing,
making sure to cut the wires so that the yellow/
green ground cable is longer than the other two.
In case of accidental disconnection this
precaution allows the ground cable to be
disconnected last.

Connect the power supply cable to the phase
connectors (L), to the neutral wire (N) of the
mains filter (FR), and to the air heater’s ground
terminal (see the wiring diagram). Use the
supplied 6.3 x 0.8 mm faston type terminals to
connect the phase and neutral wires.

Observe phase/neutral polarity, otherwise
the control equipment will generate a safety
shutdown. Verify that the system has been
grounded in compliance with the electrical
standards.

4.4.6 Remote-control panel (only for the WR

and WD versions to be ceiling installed)

The remote-control panel is equipped with a
probe for measuring the room temperature. Its
position must be chosen not only for ease of use,
but also so as to avoid air currents, heat sources,
and sources of excessive humidity which could
alter the temperature measurement.

Also avoid installing it in recesses. Do not obstruct
the openings in the panel for the same reasons
as in the last paragraph. However, it is advisable
to install it at a height of approximately 1.5
meters from the ground.

To install it on the wall, use the two screw
anchors supplied with a diameter of 4 mm.
Unhook the rear part of the panel by using the
proper tools to release the four snap fasteners.

Make two holes in the wall with a center distance
of 120 mm. Insert the screw anchors and attach
the rear part of the panel to the wall. Put the front
part of the panel back by snapping it in place.

If you should need to insert the panel’s connection
cable inside trunking, you must disconnect the
cable from the terminal board on the panel.
When you have put the cable in place, re-
establish the electrical connection by putting the
cable in its proper position on the terminal board
(see the wiring diagram).

If you need to insert it in trunking underneath, the
cable could exit from the wall in correspondence
to the hole in the rear part of the panel, so as not
to leave the cable in view. The original hole

which the cable should have passed through must
be closed with the plastic cap provided. If the
panel is attached to a metal structure or wall, this
structure or wall must be grounded.

4.4.7 Using a programmable timer

If you would like to have the air heater function
automatically at preset times, it is possible to
install a programmable timer.

A jumper for auxiliary connections (OP - see the
wiring diagram) is provided on the unit’s electrical
board between the J14 and J15 faston connectors
(4.8 x 0.8 mm type) of the terminal board on the
printed circuit. Remove the jumper and connect
the above connectors to the timer’s switch. Use
the bushing (fig. 1) for the connection cable’s
exit.

4.4.8 Connecting more than one unit with a

single external programmable timer

To operate several units with just one
programmable timer follow the diagram in figure
21 and use the same J14 and J15 connectors
listed in the previous point. You have to use a
normally-open contact relay with an adequate
rating to make this special connection.

Fig. 21

J14
J15