Daikin VRV IV RXYQ TYDN Series Engineering Data page 24

EDUS341411-N
Use the following procedure to remove the pinched piping:
1 Remove the valve cover and make sure that the stop valves are
fully closed.
1
2
2 Connect the vacuuming/recovery unit to service ports of all stop
valves.
1
4
2 3
1 Gauge manifold
2 Dry Nitrogen
3 Measuring instrument
4 Refrigerant R410A tank (siphon system)
5 Vacuum pump
6 Charge hose
7 Gas pipe stop valve
8 Liquid pipe stop valve
A Valve A
B Valve B
9 Outdoor unit
10 To indoor unit
11 Stop valve
12 Field piping
13
3 Recover gas and oil from the pinched piping by using a recovery
unit.
CAUTION
Do not vent gases into the atmosphere.
4 When all gas and oil is recovered from the pinched piping, discon-
nect the charge hose and close the service ports.
WARNING
the stop valve mounting plate with a protective plate to prevent from
15
Installation of Outdoor Units
1 Service port and service port
cover
2 Stop valve
3 Field piping connection
3
4 Stop valve cover
4
6 9
8 7
A
11
B
10 12
5 13
Stop valve for liquid
Stop valve for gas
Stop valve mounting plate
Protective plate
5 Cut off the lower part of the smaller pinched piping with an ap-
propriate tool such as pipe cutters. Let the remaining oil drip out in
case the recovery was not complete.
Wait until all oil is dripped out.
6 Cut the pinched piping off with a pipe cutter just above the brazing
point or marking if there is no brazing point.
WARNING
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.
7 Wait until all oil is dripped out before continuing with the connection
8.2.3. Connecting refrigerant piping to the outdoor unit
Front connection
Remove the knockout hole of the piping intake and connect piping
to the piping intake.
1
3
4
Open knockout
hole here
1 Liquid side stop valve
2 Gas side stop valve
3 Filed connection piping kit (accessory)
4 Knockout hole
Remove the knockout hole on the bottom frame and lead out the
piping from the bottom frame.
Installation Manual
2
3
3P362438-1B English
3P362438-1B
25