Electrical Connections; Functional Checks; Maintenance - Galletti UTN Montage, Gebrauch Und Wartung

The sections of the intake and delivery pipes are rectangular, drilled with holes for
fixing the available accessories. A round pre-sheared element (Ø 100 mm) is present
on both side panels of the unit for the direct inlet of the external air.

To implement the rectangular-section channel-type connection use accessory
PCO/C, which may be fit either at intake or at delivery.
NOTE: 2 PCO/C accessory panels are required for implementing the intake and
delivery with channels.

To implement the flexible tube-type connection, use accessory PCO/F,
GB
which is fitted directly on the machine's intake inlets, by means of drilling.
NOTE: 2 PCO/F accessory panels are required for implementing the intake and
delivery with flexible tubes.
It is possible to orient the exchanger's attachments on the opposite side as follows
(FIGURE 9):
- remove the upper and lower closing panels.
- remove the condensate tank for the horizontal installation.
- loosen the 4 fixing screws of the motor support, without unscrewing them all
the way.
- remove the heat exchanger by unscrewing the 4 fastening screws, pull it out and
turn it; eliminate the pre-sheared elements on the opposite side panel, reinsert the
heat exchanger and tighten the screws.
- reassemble the previously listed components.
- stop the outlet holes of the previously used manifolds with anticondensing
insulating material.
- FIXING the unit
Fix the standard unit to the ceiling or wall using at least 4 of the 6 slots;

For horizontal installations (ceiling-mounting) it is advisable to use 8MA
threaded bars, screw anchors suitable for the machine's weight, and to arrange
for the positioning of the machine using 2 8MA bolts and a washer the diameter
of which is suitable for inserting the slot and for then fixing the unit.
Before tightening the check nut, adjust the closing of the main nut so that the
equipment will slant correctly, i.e. for facilitating the discharging of the
condensate (FIGURE 10).
The correct slant is achieved by tilting the intake downwards as compared to
the delivery, until a difference in level of about 10 mm is obtained from one
end to the other. Make the hydraulic connections with the heat exchanger and,
for cooling operations, with the condensate discharge.
Use one of the two drains of the auxiliary tank, visible on the outside of the
unit's side panels. Fig. 3-4: horizontal (tank) and vertical condensate discharge.

For vertical installations (wall-mounting), fix the unit so that water may flow
out toward the condensate discharge used. A slant equivalent to a difference
in level of about 5 mm is enough between the two side panels.
The two condensate discharge tubes of the main tank are located inside the side
panels and may be accessed through a membrane type raceway that should
be etched for passing the discharge tube through it.
It is advisable not to remove the aforesaid raceway because it prevents the
sharp edge of the hole on the side panel from damaging the condensate
discharge tube over time.

To connect the unit to the condensate discharge line, use a flexible rubber tube
and fix it to the chosen discharge tube ( 3/8'') by means of a metal clamp (use
the discharge that is located on the hydraulic attachments side).
To assist the draining of the condensate, slant the discharge tube downwards
by at least 30 mm/m making sure that its entire route is clear and free from
bends or blockages.
UT66000182 - 03
È severamente vietata la riproduzione anche parziale di questo manuale / All copying, even partial, of this manual is strictly forbidden
- A few rules to follow

Carry out the heat exchanger's air exhaust, with pumps stopped, by means
of the air valves located adjacent to the attachments of the heat exchanger
itself.

When implementing a channel-type system, it is advisable to place the
vibration-damping joints (available as accessory GA) between the channeling
and the unit.

If you wish to install an electrical resistance module (KER) as accessory, the
delivery vibration-damping joint should be heat-resistant (accessory GA-T).

The channeling, especially the delivery one, should be insulated with anticondensing
material.

Envisage an inspection panel adjacent to the equipment for the maintenance
and cleaning operations.

Install the control panel on the wall. Choose a position that is easy to access
for the setting of the functions and, if contemplated, for the reading of the
temperature. Try to avoid positions that are directly exposed to sun rays, or
positions subject to direct hot or cold air currents, and do not place obstacles
in the way that would prevent the correct reading of the temperature.
6

ELECTRICAL CONNECTIONS

Make the electrical connections with voltage OFF, conforming to the prevailing
safety regulations.
Exclusively qualified personnel should carry out the wiring operations.Each fan-
coil thermal-ventilating unit requires a switch (IL) on the feeder line with a
distance of at least 3 mm between the opening contacts, and a suitable safety
fuse (F).Power consumption is shown on the data plate fixed to the unit.
During the installation procedure, closely adhere to the wiring diagram associated
with the unit-control panel combination. The diagrams are in the technical sheets
supplied with every accessory.
In order to make the electrical connections you must remove the lower closing panel
(figure 9) to access the fast-on terminal strip.
The power cables (power supply and control) must be routed to the terminal strip
through the membrane raceway that is on the side panel of the machine on the side
opposite the hydraulic attachments.
- FIG. 11: UTN wiring diagram without control panel.
The hatched connections are at the care of the installer.
The motors of the units run at 3 speeds.
The COMMON wire of the motor is the WHITE one: if connected incorrectly the
motor would be damaged irreparably.
The key is as follows with reference to Figure 11:
IL Line switch (not supplied)
F Safety fuse (not supplied)
1/3 1 speed among the 3 available ones
CN Fast-on connector
M Motor
WH White = common wire
BK Black = max. speed
BU-GY Blue(gray) = average speed
RD Red = min. speed
GNYE GreenYellow = earth
7

FUNCTIONAL CHECKS

Check that the equipment has been installed so that it guarantees the required slant.
Check that the condensate discharge is not clogged (by rubble deposits, etc.).
Check the seal of the hydraulic connections.
Check that all the wirings are tight (perform the check with voltage OFF).
Make sure air has been eliminated from the heat exchanger.
Power the equipment and check its working efficiency.
8

MAINTENANCE

The maintenance operations for the UTN air conditioning and hot-air heating units are
limited to the periodic cleaning of the air filter (provided on MA/F and MA/FO
accessories) and the heat exchanger, and the checking of the working efficiency of
the condensate discharge.
Only skilled personnel may perform the aforesaid maintenance.
Pay utmost attention during the maintenance operations: accidentally coming into
touch with some of the metallic parts might cause injuries therefore wear safety work
gloves.
Every time the units are started after long dwell times, make sure that air is NOT
present inside the heat exchanger.
The motor is maintenance-free since it is equipped with self-lubricating bearings.
For safety reasons, before performing any maintenance or cleaning operations,
turn off the equipment and cut voltage by turning the line switch.
6
UTN UTN UTN
UTN UTN
WARNING: