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5.4.
REFRIGERANT GAS CHARGE
lf you need to install a length of pipe longer than standard (the length tor which the unit is pre-
charged), you must add the appropriate refrigerant charge.
Additional charge (g/m)
METHOD
1.
Calculate the refrigerant charge to be added considering the parameters specified in the
"LENGTH OF REFRIGERANT CONNECTIONS" section in this manual.
2.
Connect the R32 refrigerant cylinder in a position where the liquid can be charged into the
pressure gauge unit valve where the nitrogen cylinder or the vacuum pump have been collected.
3.
Connect the pressure gauge unit to the outdoor unit charging valve (gas). When injecting the
liquid refrigerant through the gas valve, you must act slowly and pay close attention so as to
prevent liquid hammer to the compressor.
4.
Place the refrigerant cylinder on an electronic scale.
5.
Open the valve to allow the refrigerant to pass through.
6.
Close the valve when the weight of the cylinder coincides with the amount to be charged.
6. WIRING
The connection cables must comply with the specifications listed in the table below.
Outdoor unit model
Connection cable specification
Power cable specification
N.B.
Connection cables are those cables connecting the outdoor unit and the indoor unit.
Power cables are those cables connecting the outdoor unit and the electrical mains.
6.1.
WIRING THE INDOOR UNIT
Open the front, insert the connection cables from the base of the air conditioner by connecting them
to the respective terminals and secure them using appropriate cable glands present near the
terminals (as shown in the figure
LSGT25-S
15
LSGT25-S
2
4 x 1,5 mm
2
2 x 1,5 mm
below).
17
LSGT35-S
15
LSGT35-S
LSGT50-S
2
4 x 1,5 mm
4 x 2,5 mm
2
2 x 1,5 mm
2 x 2,5 mm
LSGT50-S
LSGT70-S
25
30
LSGT70-S
2
4 x 2,5 mm
2
2 x 2,5 mm
2
2
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