Galletti UTN Series Manual Download Page 4

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UT66001122 - rev. 01

È severamente vietata la riproduzione anche parziale di questo manuale / All copying, even partial, of this manual is strictly forbidden

Designed to meet the needs of users who wish to employ
electric heating or supplement conventional water heating

systems (e.g. thermal ventilating units supplied with hot water
from a heat pump), the RE supplementary heating element
module can be used on all UTN thermal ventilating units.
The RE accessory is available in the following versions:

TABLE 1

The RE module shown in figure (1) is mainly composed of:

Armoured finned heating elements

made of aluminium,

complete with supporting brackets for fastening them to the load-
bearing structure of the electric module, which is built from thick
galvanised sheet steel, duly insulated and provided with an
electric control panel for housing the power relays and wire
terminals. In conformity with electric safety directives, the module
is equipped with 3 automatic-reset safety devices (one for each
heating element) and one manual-reset safety device.
B)

An automatic-reset safety thermostat

, integral with the

heating element, which switches it off should overheating occur
as a result of irregular operating conditions or a fault in the fan
motor unit;
C)

A manual-reset safety thermostat

, mounted on the load-

bearing structure, which switches off the heating element in the
event of a simultaneous failure of all 3 automatic-reset safety
thermostats.

Caution

: the sensitive element of the manual-reset safety

thermostat is a capillary bulb that must be duly re-positioned,
always in the top part, if the RE module is installed in a configuration
differing from the standard one. In the standard configuration, the
box housing the electric connections is situated on the same side
as the water connections. Therefore, viewing the machine from
the front after it has been installed, the electric module will be
positioned on the machine itself with the electric box on the left
side. In this configuration, the thermostat bulb will be in the correct
position (factory configuration). If the electric module is installed
in the opposite position (electric box on the right), it will be
necessary to move the thermostat bulb into the position shown
in figure (2); care must be taken to fasten it securely with clamps,
using the holes provided for this purpose.
D)

An electric box

incorporating the power contactors, connection

terminals and manual-reset thermostat.
E)

L-shaped brackets and screws

for fastening the module to

the machine outlet.
The

heating element must be associated with the following

control:

INSTALLATION

Warning! Before starting the installation procedure, disconnect
the thermal ventilating unit from the power supply
THE RE ELECTRIC MODULE CAN BE INSTALLED ONLY ON
THE MACHINE AIR OUTLET

The overall dimensions are shown in figures 4a and 4b.

It is recommended to mount the RE module on the thermal
ventilating unit before installing the unit itself in place.

1. Place the thermal ventilating unit in an upright position.

Fasten the L-shaped brackets on the two short sides of the
air outlet, using the 4 holes provided (2 per side) and self-
tapping screws (supplied in the kit).

2. After applying the 2 L-shaped brackets, which serve both

as a guide and support for the RE module, you can install
the module itself; make sure that the L-shaped brackets
are both positioned inside the rectangular outlet.

3. Apply the self-tapping screws (supplied in the kit) as

shown in figure (3): the screws on the short sides act on
the L-shaped brackets, while on the two long sides holes
are provided for fastening the module directly to the outlet
of the thermal ventilating unit.

NOTE:

The electric module has holes like those on the machine air
intake, on the extremity turned toward the air outflow ducts. This
allows you to attach all the accessories that can be directly applied
on the machine (PCOC, PCOF, GAT, etc…).

Important: if you wish to install vibration-damping couplings
use ONLY GAT heat-resistant couplings

After fastening the electric module to the thermal ventilating unit,
you can position the latter in its final installation site and proceed
with the wiring.
Each thermal-ventilating unit requires a switch (

) on the feeder

line with a distance of at least 3 mm between the opening
contacts, and a suitable safety fuse (

I) Open the electric box by loosening the 4 self-tapping screws on
the front of the cover.
II) Connect the electric wires, using the wire clamps provided,
both for the power supply line and the wire connecting to the
control on the wall.

Important

: The controls provided are MYCOMFORT BASE, MEDIUM

and LARGE, which incorporates all the necessary functions for
managing the thermal ventilating unit, the heating elements (and
the on-off valves on the water side, where present).

NOTE: the control guarantees the complete safety of the RE
module, thanks to the POST-VENTILATION function, which
keeps the fan running for 2 minutes after the heating elements
have been switched off because the set temperature point has
been reached. This feature serves to prevent dangerous
overheating which may be caused by the thermal inertia of the
heating elements themselves.

Galletti S.p.A. will not be liable for any faults or damage caused
by improper use of the RE module and/or an inadequate control
panel.

If the module is applied on thermal ventilating units with plumbing
connections on the right (i.e. with the electric box on the right)
it will be necessary to change the position of the bulb of the
manual-reset safety thermostat.

As noted above in item (C), if the electric module is installed in a
position opposite to the factory configuration, it will be necessary
to move the thermostat bulb into the position shown in figure (2);
care must be taken to fasten it securely with clamps, using the
holes provided for this purpose.

In case of vertical installation, the safety thermostat bulb must
be secured to the wires of the automatic-reset safety thermostat
(see fig 1 B) using the clamps provided in the kit.

Warning: the control panel must be mounted on the wall in an
easily accessible position allowing the user to set the functions
while ensuring an accurate reading of the ambient temperature.

Control

Description of controls

code

Microprocessor control: automatic control of

ventilating convector, valves and heating element

Power card to be added to control panels. For UTN 30 - UTN 40 only.

UYIPM

EYMCBE
EYMCME

EYMCLE

+ EYMCSWE

Electrical

Current