Refrigerant Piping - Panasonic S-22KA1E5 Service Manual

Replace the drain hose
Rear view forleft piping installation
Drain hose
Drain cap
How to pull the piping and drain hose out, in case of the embedded piping
Apply putty or
caulking material
to seal the wall
opening.
PVC tube for
drain hose (VP-20)
11.4.4

REFRIGERANT PIPING

Refrigerant is charged to the outdoor unit. For details, see the manual for installation work of outdoor unit. (Additional
charging, etc.)
1. Brazing for piping.
a. Execute brazing before tightening the flare nut.
b. Brazing must be executed while blowing
nitrogen gas. (This prevents generation of
oxidized scale in copper pipe.)
2. When there is a lot of brazings for long piping,
install a strainer midway of the piping. (The strainer
is locally supplied.)
3. Use clean copper pipe with inner wall surface free
from mist and dust. Blow nitrogen gas or air to
blow off dust in the pipe before connection.
4. Form the piping according to its routing. Avoid
bending and bending back the same piping point
more than three times. (This will result in hardening
of the pipe).
5. After deforming the pipe, align centers of the union
fitting of the indoor unit and the piping, and tighten
them firmly with wrenches.
Vacuum drying
After completing the piping connection, execute vacuum drying for the connecting piping and the indoor unit.
The vacuum drying must be carried out by using the service ports of both the liquid and gas side valves.
CAUTION Use two wrenches and tighten with regular torque.
Flare nut fastening torque N•m (kgf•cm)
ø6.35mm 18 (180)
ø9.52mm 42 (430)
Connecting cable
Adjustthe piping slightlydownwards.
Connecting
cable
Piping
Drain hose
from main unit
PVC tube (VP-65) for piping
and connecting cable
PVC tube for drain hose (VP-30)
ø12.7mm 55 (560)
ø15.88mm 65 (660)
Drain hose
. In case of left piping how to insert the
connecting cable and drain hose.
PVC tube
for drain
Cable
hose
Piping
Indoor unit
72 mm
(For the right piping, follow the same procedure)
6. Connect pipe to the service valve or ball valve
which is located below the outdoor unit.
7. After completed the piping connection, be sure to
check if there is gas leakage in indoor and outdoor
connection.
Cooling capacity
2.2kW - 6.3kW
7.1kW or more
87
Connecting
cable
Piping
More than 1150 mm
Drain hose
Sleeve for piping hole
Drain
hose
Piping
Cable
Liquid piping Gas side piping
ø6.35mm
ø9.52mm
Union
ø12.7mm
ø15.88mm