Ariston 80L Manual Del Usuario página 44

Heat pump water heater – TECHNICAL INFORMATION FOR INSTALLERS
Preparing of the refrigerating pipes
WARNING! Before carrying out any installation check the following:
a) Use only copper tubes for air conditioners type (insulated copper tubing suitable for the refrigeration and the
conditioning, copper thickness al least 0.8 mm, insulation thickness at least 6 mm)
b) Provide a path of the pipes as short and simple as possible (maximum length 8 m with 3 m of fall). Do not
provide a path that may obstruct the access to the cap and the removal of flange. See Figure 6
c) Protect the pipes and cables to avoid damage
WARNING! The refrigerant lines, and fittings for connection must be insulated to avoid
dangerous burns, loss of performance and product malfunction. Ensure the insulating sheath
of the tubes through fastening clamps to prevent it from moving.
Remove the locking of the tubes shortly before making the connection: absolutely must prevent moisture or dirt
ingress. If a pipe is bent too often becomes hard: Do not bend more than 2 times in the same section. Unwind the
hose without pulling (see fig. 7).
Connecting the internal unit
a) Shape the pipes according to the path
b) Remove the brass plug on the indoor unit and store them (check that no impurities are left)
c) Cut the pipe to the fixed length, with a pipe cutter, avoiding any deformation
d) Remove burrs with pipe reamer avoiding to get impurities inside (keep down the tube)
e) Insert the threaded brass flare nuts on the pipes in the correct direction
f) Insert the tube into the flaring tool and make the flange at the end of the connecting pipe, as indicated in the
table (see fig. 8):
ø NOMINAL ø EXTERNAL
1/4
3/8
g) After confirming that there are no wrinkles or tears on the flare, connect the pipes using two spanners, being
careful not to damage the pipes. If the force is insufficient, then there will be leaks. Although the force is
excessive, there may be losses because it is easy to damage the flange. The safest method is to tighten the
connection by using a spanner and a torque wrench, in this case use the table:
ø Pipe
6,35 mm (1/4")
9,5 mm (3/8")
h) We recommend to leave a few inches of copper pipe, for any subsequent operations in near the taps.
Connecting the external unit
Remove the gas connections plastic cover, screw the flare nuts to connect the outdoor unit with the same method
described for the internal unit.
Making the vacuum, the connection and check the seal (see fig 9)
The air bleeding from the circuit should take place with a vacuum pump and pressure gauge assembly suitable for
R134a. Make sure the vacuum pump is full of oil up to the level indicated by the oil gauge.
a) Loose the caps of the taps of the 2 and 3 way valves (E), and of the service valve (C); verify that the two valves
on the outdoor unit are closed (D)
b) Connect the vacuum pump (B) to the service valve (C) by the attack of low pressure gauge (A);
c) After opened the valves of the vacuum pump (B), start it and let it run. Create a vacuum for about 20 / 25
minutes
d) Verify that the low pressure gauge (A) indicates a pressure of 1 bar (or -76 cm Hg)
THICKNESS mm
6.35 0.8
9.52 0.8
Tightening torque [Kgf x cm]
160 - 200
300 - 350
DIMENSION "A" mm
FLARING TOOL
0 ÷ 0.5
0 ÷ 0.5
Corresponding force (with 20 cm spanner)
Wrist force
Arm force
43
DIMENSION "L" mm
FLARING TOOL
1.8 ÷ 2.0
2.5 ÷ 2.7