Daikin VRV III, Installation Manual

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R REMQ10~16P8 + REMHQ12P8Y1B
VRVIII System air conditioner
4PW48463-1A
Installation manual
6
6.4. Connecting the refrigerant piping
1 Front connection or side connection
Installation of refrigerant piping is possible as front connection or
side connection (when taken out from the bottom) as shown in
the figure.
2 Removing the pinched piping (See figure 6)
See figure 6 .
1 Left-side connection
2 Front connection
3 Right-side connection
NOTE Precautions when knocking out knockout
holes
■
Be sure to avoid damaging the casing
■
After knocking out the knockout holes, we
recommend you remove the burrs and paint
the edges and areas around the edges using
repair paint to prevent rusting.
■
When passing electrical wiring through the
knockout holes, wrap the wiring with
protective tape to prevent damage.
1 Large knockout hole
2 Small knockout hole
3 Drill
4 Points for drilling
1
3
2
1
4 1 3 2 4
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.
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 parts looks like
detail A in
figure 6 , proceed with procedure
step 8.
In case the pinched piping lower part looks like
detail B in
figure 6 , 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.
7. Wait until all oil is dripped out.
8. Dissolve the brazing using a burner and remove
the pinched piping or cut the pinched piping off
with a pipe cutter.
1 Pinched piping
2 Stop valve
3 Service port
4 Point of melting the brazing metal
5 Small lower piece of pipe
Precautions when connecting field piping.
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.
Do not vent gases into the
atmosphere.