27
COMMISSIONING AND MAINtENANCE
3
COMMISSIONING AND MAINtENANCE
3.1
Preparation for first commissioning
Prior to commissioning, it is necessary to check that:
—
all the safety conditions have been met
—
installation distances and gaps have been respected
—
the electrical connections have been properly completed
—
power supply values are correct.
—
the earthing has been carried out correctly
—
all the connections have been properly tightened
—
the shut-off valves are open
9
The device must always be powered electrically in order to
allow for the compressor's oil to be properly pre-heated.
If the device is installed in very cold areas, the device should
be under voltage for at least 12 hours before starting it up
for the first time.
ON
OFF
—
position the system's main switch in the "ON" position.
3.2
Putting into service
After having completed all the operations required to prepare
for first commissioning, do the following to activate the device:
—
follow the instructions given in the manual of the indoor
unit that you are installing
9
Keep the leak finder on and close to the unit so that it si-
gnals any refrigerant leak.
9
Use an electronic leak finder properly calibrated for the sy-
stem refrigerant.
0
It is forbidden to use leak finders with halogen lamps.
Checks during and after the first commissioning
After starting the device, check that:
—
the current consumed by the compressor is less than the
maximum permitted
—
the device is operating under the recommended operating
conditions
—
the unit is able to stop and start up again
9
Should any of the above-listed controls have problems: turn
the device off and call the Technical Service immediately.
9
Do not touch the device pipes to prevent potential burns.
9
Take anti-static precautions in case of weather conditions
where humidity is less than 40%.
9
Avoid using mobile phones.
Additional refrigerant charge
The units are supplied with a sufficient amount of refrigerant gas
for a pre-set length of the connection pipes.
An additional refrigerant charge is needed if such length is exce-
eded.
The pre-set values are detailed in the following table:
Model
25
35
50
Maximum length with
standard charge
m
7
7
7
Additional charge
g/m
20
20
20
9
The device must be earthed before performing the additio-
nal charge.
To perform the additional charge:
A
High pressure
B
Low pressure
1
Pressure gauge unit
2
Electronic scale
3
3-way valve service connection
A
B
1
R32
3
2
—
connect the refrigerant cylinder to the pressure gauge unit
—
connect the charging tube to the service connection on the
3-way shut-off valve
—
remove the air from the charging tube
—
charge the refrigerant with an electronic scale
—
disconnect the charging tube from the service valve
—
refit the three-way valve closing plug
9
Carefully check for absence of leakages from the closing
point of the plug.
9
Do not force beyond the stop point to prevent damaging the
shaft and causing leakage as a consequence.
9
Use equipment suitable for the system refrigerant.
9
Use only the system refrigerant.
