Operating Instructions and Installation Instructions

V 03/17
59
Use equipment and connecting pipes
suitable for R410A refrigerator.
MODELS Meters
Pipes length with a standard
refrigerating charge
5
Maximum pipes length with
additional charge
20
Maximum pipes length per unit 10
Additional charge g/m 15
Always write the additional
refrigerant charge on the data label
affixed to the unit outside.
The maximum height difference
between indoor and outdoor unit is
10m.
Wrap with straps all refrigerant pipes
and joints.
Tighten connections using two keys
operated in opposite directions.
 Keep sealed all open extremities of the
pipes with a cap until the connection is
completed. Be sure not to let anything in
the pipes or in the system, such as dirt,
water, etc.
 The piping connected to the indoor and
outdoor unit must be new. Required
thickness of pipes is 0.8 mm or more.
 Only use R410A refrigerant in line woith
the one already loaded in the outdoor unit
to fill the refrigerant in the system.
 Additional charge of refrigerant and oil
 If the length of the connecting pipe is
increased by 10 m compared to the
standard length, add 5 ml of refrigerant
oil for every 5 m of pipe added.
 Method for calculating the amount of
additional refrigerant charge (liquid pipe):
amount of additional refrigerant charge =
additional length of pipe liquid x amount
of additional refrigerant charge per meter.
Vacuum pump
Using the vacuum pump
 Remove the valve caps of the liquid valve and
gas valve and remove the nut of the
refrigerant charge port.
 Connect the piezometer charge pipe to the
refrigerant charge bore of the gas valve. Then
connect the other charge pipe to the vacuum
pump.
 Open the piezometer completely and let it run
for 10 – 15 minutes to check if the pressure of
the piezometer remains at -0.1 MPa.
 Close the vacuum pump and maintain this
condition for 1 – 2 minutes to check if the
pressure of the piezometer remains at -
0.1 MPa. If the pressure falls, there may be a
leak.
valvola del liquido
valvola del gas
apertura carica
refrigerante
dado apertura
carica refrigerante
pompa a vuoto
piezometro
cappuccio
valvola
Lo Hi
chiave esagonale
interna
aprire
chiudere
valvoladelliquido liquidvalve
valvoladelgas gasvalve
aperturacaricarefrigerante refrigerantchargeport
dadoaperturacaricarefrigerante refrigerantchargeport
piezometro piezometer