3.2 DISTANCES OF RESPECT
(Fig. 7)
Respect the minimum spaces, so as to allow the correct
operation and all installation operations e maintenance.
3.3 ROOF INSTALLATION
- If the outdoor unit is installed on a roof, make sure of
level the unit. Make sure the roof structure is appropriate for
mounting the unit.
- Consult the local codes regarding the assembly on the
roof.
- If the outdoor unit is installed on the roof or on the external
walls, this could cause excessive noise and vibrations and
be classified as an unsuitable service installation.
3.4 ELIMINATION OF AIR WITH THE VACUUM PUMP
(Fig 8)
Air and moisture in the refrigerant system can cause effects
unwanted as shown below:
- Increased pressure in the system.
- Increased current consumption.
- Decreased refrigerant efficiency.
- Freezing and obstruction of the capillary pipes.
- Corrosion of the parts of the refrigeration system
- If the appliance must be suspended from a wall external, the
support must comply with the technical specifications.
The wall where the unit is to be installed must be in bricks or
material of similar consistency, otherwise it must be reinforced.
The support brackets must be stable, resistant and with an
adequate degree of protection against corrosion.
WARNING! Make sure of the bearing capacity of the part
on which the shelves and the anchoring system are placed
to the wall itself, depending on the weight of the appliance
to install.
- Do not install the appliance near sources of heat and / or
areas with fire hazards.
- Installation in areas with highly corrosive atmosphere
it is not allowed; in particular climatic conditions as in
near the sea, it is mandatory to provide for a duration of
lower life of the product and in any case a more frequent and
accurate maintenance.
- In the outdoor unit, from which the water from is eliminated
condensate, provide a suitable drainage and / or
channelling of the same, so as to avoid situations of
danger due for example to ice formation on
transit areas.
- The outdoor unit is designed to be installed outdoors and
it does not need a special base, however it must
be securely positioned on a support surface
horizontal of adequate bearing capacity and equipped with
special ones anti-vibration pads (Fig 6).
To avoid the above, the internal assembly and the tubes, placed
between
internal and external group, must be tested for leaks
and purged to remove non-condensing elements and moisture
from the
system.
Check that each tube, (both the gas side tubes
and the
liquid) between internal group and external group, has
been connected
in the correct way and that all the wiring
necessary for the testing
have been carried out.
Remove the
valve cap on the outdoor unit.
Make sure at this point that both
the gas valves are on
liquid remain closed.
Check the length of
the pipe and relative quantity of the refrigerant,
for a correct
charge, check the superheat value.
At the
table values are
indicative.
When changing places to the unit, perform the purge
with the
vacuum pump. Make sure that the refrigerant inside the
conditioner is always in liquid state.
The outdoor unit is supplied
with a charge of refrigerant gas
R410A suitable for guaranteeing
correct operation up to one
maximum distance of 5 meters from
the indoor unit.
If you decide to install the 2 units at a greater
distance
of 5 meters, make sure to add 20 g of refrigerant gas
per
every meter more than piping (Tab. 3).
For example, if there
are 7 meters of indoor and outdoor units
add 40 g of R410A gas
to the pipe.
In any case, never exceed 15 meters.
Perform the
addition only after having carried out the vacuum in the
pipes
that connect the 2 units, after which you can proceed
with the
opening of the gas taps, mounted on the machine.
3.5
EVACUATION
Connect the end of the charging hose to the
pump
of the vacuum to evacuate the air from the pipes of the
indoor unit.
Check that the "LO" knob on the pressure gauge
valve
be open. Then run the vacuum pump. The time of
operation varies depending on the length of the pipes and the
pump capacity.
When the desired vacuum is reached, close the
knob
"LO" of the pressure gauge valve and stop the vacuum
pump.
In conclusion, using a service valve wrench, rotate
the
stem of the gas side valve counter clockwise to open it
completely.
Loosen the flexible charge hose connected to the
service socket
of the gas side to release the pressure, then
remove the tube.
Replace the gas valve and nut cover
service
and tighten well with an adjustable wrench.
This procedure is
very important to avoid losses
Plant
Replace the service valve
caps on both the gas and fuel side
from the liquid one and
tighten well.
This completes the air purge procedure with the
pump
of the vacuum, make sure that all the pipes are connected
in a manner
correct and that the service valves of the gas and
liquid sides are
completely open.
3.6 PUMP DOWN
This procedure is performed when the group must be
moved or
assistance is provided to the refrigerant circuit.
Emptying allows
you to collect all the refrigerant in the
external group without
losses occurring.
Fig. 6
8
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