RXYQ8~18P7W1BR1
VRVIII System air conditioner
4PW44039-1E – 07.2010
Installation manual
6
2
Removing the pinched piping
3
Outdoor unit installed
■
Front connection:
Remove the stop valve cover to connect.
■
Bottom connection:
Remove the knock holes on the bottom frame and route the
piping under the bottom frame.
■
Processing the gas side accessory pipe (2)
Only in case of connecting at lateral side, cut the gas side
accessory pipe (2) as shown in
Never remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
Use the following procedure to remove the pinched piping:
1
Remove the valve lid and make sure
that the stop valves are fully closed.
2
Connect a charge hose to service ports of all stop
valves.
3
Recover gas and oil from the pinched piping by
using a recovery unit.
Do not vent gases into the atmosphere.
4
When all gas and oil is recovered from the pinched
piping, disconnect the charge hose and close the
service ports.
5
In case the pinched piping lower part looks like
detail
, follow instructions as per
procedure steps 7+8.
In case the pinched piping lower part looks like
detail
, follow instructions as per
procedure steps 6+7+8.
6
Cut off the lower part of the smaller pinched
piping with an appropriate tool (e.g. a pipe
cutter, a pair of nippers, ...) so that a cross-
section is open, allowing remaining oil to
drip out in case the recovery was not complete.
Wait until all oil is dripped out.
7
Cut the pinched piping off with a pipe cutter just
above the brazing point or just above the marking in
case there is no brazing point.
Never remove the pinched
piping by brazing.
8
Wait until all oil is dripped out in case the recovery
was not complete, and only then proceed with
connection of the field piping.
1
Service port
2
Stop valve
3
Point of pipe cutting just above brazing point or above marking
A
Pinched piping
B
Pinched piping
A
B
Precautions when connecting field piping.
■
Perform brazing at the gas stop valve before
brazing at the liquid stop valve.
■
Add brazing material as shown in the figure.
■
Be sure to use the supplied accessory pipes
when carrying out piping work in the field.
■
Be sure that the field installed piping does not
touch other pipes, the bottom panel or side
panel. Especially for the bottom and side
connection, be sure to protect the piping with
suitable insulation, to prevent it from coming into
contact with the casing.
A
Front connection
Remove the stop valve cover to connect.
B
Bottom connection:
Remove the knock holes on the bottom frame and route the piping
under the bottom frame
1
Gas pipe stop valve
2
Liquid pipe stop valve
3
Service port for adding refrigerant
4
Gas side accessory pipe (1)
5
Gas side accessory pipe (2)
6
Liquid side accessory pipe (1)
7
Liquid side accessory pipe (2)
8
Brazing
9
Gas side piping (field supply)
10
Liquid side piping (field supply)
11
Punch the knockout holes (use a hammer)
1
Gas side accessory pipe
2
Cutting location
3
Gas side piping (field supply)
4
Base
Unit type
A
B
C
D
8 Hp
(mm)
156
17
188
247
10 Hp
(mm)
156
23
192
247
12 Hp
(mm)
150
29
192
247
14~18 Hp
(mm)
150
29
192
251
NOTE
■
When connecting the piping on site, be sure to
use the accessory piping.
■
Make sure the onsite piping does not come into
contact with other piping, the bottom frame or side
panels of the unit.
