Galletti S 12 Manual de instalación, uso y mantenimiento - Página 5
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for hydraulic connections use a tightening wrench to avoid
the manifold rotation that may damage the heat exchanger
(figure 7)
On completing installation, open and direct the louvers.
6
ELECTRICAL CONNECTIONS
The standard motors installed in AREO fan heaters are of the closed type:
asynchronous three-phase 2-speed motors (400/400 V star-delta
connection).
400/400 V - Y∆ motors are equipped internally with a thermal cutout and
speeds are selected by means of a normal star-delta switch (accessory
CST).
The terminals of the cutouts are connected to the terminal block so that
they can be used as protection in series with the coil of a contactor.
If the internal cutout is not used to protect the motor, it will be necessary
to provide a motor overload cutout set at a current that is 10-15% higher
than the current indicated on the unit rating plate.
Make the electrical connections with the power supply disconnected, in
accordance with current safety regulations. All the wiring must be done
by qualified personnel.
Check that the mains electricity supply is compatible with the voltage
shown on the unit rating plate.
Scrupulously follow the wiring diagram provided, according to the type
of installation.
Each fan heater 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 table in figure 8 shows the electrical specifications of the motors,
where:
M
Number of poles of motor
RPM
Motor revolutions
V
Supply voltage
P A
Electrical input
CA
Current absorption
The wiring layouts are shown in the figures from 9 to 16:
9) Delta connection to terminal block of 400/400 V - Y∆ motors, high
speed
10) Star connection to terminal block of 400/400 V - Y∆ motors, low speed
11) Wiring diagram showing connection of 400/400 V motor, with star-
delta selector (Y∆).
Legend of wiring diagrams:
CST
star-triangle switch (option)
F
Protective fuse (NOT SUPPLIED)
IL
Switch (NOT SUPPLIED)
M
Motor
7
CHECKS BEFORE STARTUP
- Check the tightness of the plumbing connections.
- Check the stability of the mounting brackets if the unit is installed on the
wall; the chains if the unit is ceiling mounted.
- Make sure that the wiring is firmly secured.
- Make sure that air has been eliminated from the heat exchanger.
- Adjust the louvers as desired and switch on the unit to check that it works
properly.
- Always make sure that the fan turns in the correct direction (ANTI-
CLOCKWISE viewing the fan heater from the rear, figure 12).
È severamente vietata la riproduzione anche parziale di questo manuale / All copying, even partial, of this manual is strictly forbidden
WARNING:
8
MAINTENANCE
The routine maintenance operations to be performed on S fan heaters
mainly regard the heat exchanger. It must be cleaned to eliminate dust
buildup, which tends to obstruct the spaces between the fins, resulting
in a decrease in the quantity of heat exchanged.
This job may be done using jets of compressed air.
If grease has also deposited you can wash the fins, taking care not to wet
the electric motor and making sure to dry the finned block thoroughly before
starting the fan heater.
It is recommended to carry out these operations at least once a year before
the start of the heating season.
The electric motor requires no maintenance as it is of the closed type with
self-lubricating bearings.
Every time you start up the unit after it has been off for a long time, make
sure no air is trapped in the heat exchanger.
Special care should be taken when carrying out maintenance work:
- some metal parts may cause injuries; wear protective gloves.
- maintenance may be performed exclusively by specialised personnel;
contact your dealer or installer.
- For safety reasons, before carrying out any maintenance or cleaning
jobs, put the main switch of the unit off to disconnect the power supply.
- If any work needs to be done on a unit that is working with steam, it is
advisable to shut off the steam (by means of the on-off valves) and
allow the fan to run for a few minutes until all the metal parts have cooled
down before carrying out any job on the fan heater.
Stop the fan and disconnect the unit from the power supply before
working on it.
9
TROUBLESHOOTING
If the unit is not working properly, before calling a service engineer carry
out the checks indicated in the table below.
If the problem cannot be solved, contact the dealer or service centre.
Problem
Cause
The fan heater does
1 No power supply
not work at all
2 The motor overload
cutout has tripped
3 The main switch is on
o f f
The fan heater
1 An obstacle is
provides inadequate
obstructing the air
heating
intake or outlet
2 The operating speed
selected is too low
The fan heater "leaks"
1 Operation in 4-pole air
water.
conditioning mode
2 Leaky plumbing
connections
5
G B
Solution
1 Restore the power
supply
2 Contact a service
engineer
3 Switch on the power
supply
1 Remove the obstacle
2 Select a higher speed
1 Select a lower speed
2 Contact a service
centre or your installer.
AP66000409 - 01