Fig 19
2-5
Indoor unit
wall hole
Outdoor unit
Obliquity
Sleeve for pipe passing through wall
(Section drawing of wall hole)
Cut the sleeve short according
to the thickness of the wall
The pipe and wire should be protected with the sleeve when it drills through the
wall.(Fig 19)
5
.
2
.
2
.
2
Drill through the wall:
■
If the
①
②
°
③
④
5
.
2
.
2
.
3
Exhaust the air in connecting pipeline:
connection pipe is no more than 5 meters, use refrigerant in outdoor
unit to exhaust the air(50-100 g refrigerant is charged for emptying the pipe
before the outdoor unit is delivered, refer to Fig 20).
Srew down the nuts at A, B, C, D joint completely.
Turn on the nut of the Valve B with the hexagon wrench and then turn the
valve core 45
anti-clockwisely for 10 seconds with the inner-hexagon wrench,
then tighten the union A.
Have the leak test at A, B, C, D joint and then press the core of Valve A to
exhaust the air for 20 seconds and then screw down the service valve.
Open Check valve B and A completely with the inner-hexagon wrench, then
tighten nuts of them.
Pipe connector
Outdoor unit
Indoor unit
Air side
Liquid side
A
B
C
D
Fig 20
■
exhaust the air ; As for the unit utilizing R410A, it must use vacuum pump to
exhaust the air no matter how long the pipe is . (Refer to Fig 21)
①
Open Nut A, connect Charging hose 1 of the manifold to valve A (Valve A and
B must be turned off). Then connect Charging hose 2 to the vacuum pump.
②
Open Low pressure handle of the manifold Lo complete.
③
Start the vacuum pump to exhaust the air. Open valve B a little to check
whether the air come in or not.(The noise from vacuum pump changes and the
reading of gauge alters from negative to zero),and then tighten the valve nut.
④
After exhausting the air, close Low pressure handle of the manifold
(
Lo
)
completely.
NOTE:
Exhaust the air over 15 minutes and ensure the multimeter show
"
-1.0x105Pa
"
(-76cmHg).
When connect pipe length over 5 meters(single distance),use vacuum pump to
19
