Galletti UTN PA 90 Serie Manual De Instrucciones página 3

P P P P P A 90 A 90 A 90 A 90
A 90
The outdoor air inlet motorized louvre is intended for replacing the
G B
air in the room directly from the air-handling unit. The amount of
outdoor air that will be let into the room, after having been filtered and
treated thermally, may be regulated proportionally from 0 to 100% by
means of a servomotor controlled by a rotary potentiometer that is inside
the specific CSD control, which is designed for flush wall-mounting
installations.
Kit PA90, as shown in figure (1), essentially comprises the following
components:
A) Outdoor air inlet louvre made of galvanized steel sheet and setup
for being connected to the machine, at one end, and to the other required
accessories.
B) Servomotor connected directly to the louvre's baffle, with a
protection rating of IP54 and power supply of ~ 24V.
The louvre may be opened or closed automatically at the signal of the
external auxiliary contacts (not supplied) such as antifreeze thermostats,
timers, etc., with the possibility of connecting multi-servomotors in
parallel to an individual opening-closing control.
C) 230V - 24V voltage transformer, complete with support terminal
strip housed inside the specific electrical box, which functions as a
mechanical protection for preventing the access to the connecting
terminal strip and to the transformer itself.
D) Self-threading fixing screws.
The control panel for activating the servomotor (flush wall-mounting,
called CSD, to be ordered separately). It is to be remotely installed and
is to be used for closing or opening the louvre from 0 to 100%.
To prevent the water from freezing inside the heat exchanger during the
winter, close the outdoor air inlet when the system is not operational or
use an antifreeze solution checking its freezing point:
% of glycol in weight
Freezing point (°C)
INSTALLATION
The PA90 air inlet louvre may be installed on the UTN air-
handling unit in both air intake configurations (AA or AB)
outlined in the installation, operation and maintenance manual.
1. Check that the desired installation complies with one of the
configurations in figure (2).
2a UTN + PA90 horizontal
2b UTN + PA90 vertical
It is advisable to mount the air inlet louvre on the air-handling
unit before installing the unit in its final seat. Adjust the self-
threading fixing screws (supplied in the kit) as shown in figure
(2)
DO NOT handle the accessory by holding it from the mobile
louvre to prevent permanent deformations that could cause
malfunctions over time.
Note:
The drilled holes on both ends of the PA90 module (outdoor air inlet and
recycled air inlet) are like those on the machine's intake inlet. As such,
it will be possible to mount the module on the unit itself and arrange the
holes, at both ends, identical to those of the intake inlet of the UTN.
Therefore you may couple all the accessories that may be mounted on
the basic machine. In particular the following accessories: (MAF, MAFO,
PCOC, PCOF, etc...)
It is advisable to couple the outdoor air inlet louvre with the GR intake grid
(see GR accessory card) in the model with the flat G2 filter included in
the frame.
To limit flow resistance of the sucked outdoor air, comply with the
sections indicated in figure 3. As such, even when sucking in all the fresh
air, the intake section remains at least the same at the machine's intake
inlet.
Legend of figure 3:
UTN Air handling unit intake
INT This is the recycled air (indoor air)
EXT This is the fresh air (outdoor air)
3. Install a flush-mounted remote control panel as shown in figure (4).
4. Make the electrical connections complying with the diagrams in figures
5 and 6 that show the following items:
Figure 5: CSD with one PA90;
Figure 6: CSD with more than one PA90 (10 at the most).
È severamente vietata la riproduzione anche parziale di questo manuale / All copying, even partial, of this manual is strictly forbidden
0 10 20 30
0 -4 -10 -16
The following abbreviations are used in the diagrams:
CSD - Remote control
F - Protection fuse (not supplied)
IL
- Line circuit breaker (not supplied)
- Louvre servomotor
NM24SR
- Terminal strip
M
TL - Supplied transformer
TI - Transformer for centralized 24V line
A, B - Auxiliary contacts not supplied (antifreeze thermostat, etc.):
A open + B open = Indoor air 100%
A open + B closed = Outdoor air 100%
A closed + B open = Adjustment 0 to 100%
A closed + B closed = Outdoor air 100 %
1 Air-handling unit power line
2
Power supply of succeeding motors
Make the electrical connections, with power OFF, conforming
to the prevailing safety regulations.
Each 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).
The installer is in charge of carrying out the hatched
connections.
If more than one louvre is connected to an individual CSD
control, eliminate the transformer (T) and wire everything as
indicated in the diagram of figure 6. In this case, provide a 24V-
power supply line by sizing the transformer (TL) according to
the number of expected louvres. The consumption of every
single servomotor is 5 VA.
The PA90 louvres may be connected in parallel to a unique control up to
40
a maximum of 10.
-24
OPERATION
The louvre is operated by the control panel that contains the rotary
potentiometer that regulates the opening of the louvre in proportional
mode.
On setting the control to 100%, the position of the louvre is that of total
outdoor air inlet. Vice versa on setting the control to 0%, the position of
the louvre is that of total ambient air recycle.
The serigraphy on the control panel indicates the percentage of the fresh
air.
CLEANING OF THE AIR FILTER
At regular intervals, clean the filter on the fresh air line and the filter on
the recycled air line.
HOW TO PLACE YOUR ORDER
The codes of the outdoor air inlet motorized louvres are outlined in the
table.
Warning: The servomotor is always located on the left-hand side.
Accessory UTN 06-08
PA90 UYPA9006
3
UTN 12 UTN 16 UTN 22
UYPA9012 UYPA9016 UYPA9022 UYPA9030
UT66000338 - rev. 01
G B
UTN 30 UTN 40
UYPA9040