Connecting The Refrigerant Piping; To Remove The Spun Pipes - Daikin LRYEN-AY1 Installation And Operation Manual

13 Piping installation
13.3

Connecting the refrigerant piping

DANGER: RISK OF BURNING/SCALDING
13.3.1

To remove the spun pipes

WARNING
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
If these instructions are NOT followed correctly it may
result in property damage or personal injury, which may be
serious depending on the circumstances.
1 Open the stop valve cap, unlock the valve and check if the
valve is closed.
1
1 Remove the valve cap with 2 spanners
(counterclockwise).
2 Loosen the packing holder by rotating counterclockwise
from 1/8 to 1/2 turn.
3 Close the valve (clockwise).
2 Open the service port cap slowly and check that there is no
pressure left.
3 Incrementally loosen the valve core to ensure that there is no
pressure left.
4 Cut off the lower part of the gas and liquid stop valve pipes
along the black line. Use only appropriate tools, such as a pipe
cutter or pair of nippers.
WARNING
Never remove the spun piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
INFORMATION
If the stop valve was initially open, a small amount of
refrigerant or oil may leak out.
5 Wait until all oil has dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
You can now connect the ingoing and outgoing refrigerant piping.
Installation and operation manual
22
2 3
13.3.2 To connect the refrigerant piping to the
outdoor unit
You can route refrigerant piping to the front or side of the unit.
For the outdoor unit:
b
a
a Left side connection
b Front connection (refrigeration)
c Front connection (air conditioner)
d Right side connection
For the capacity up unit:
b
a
a Left side connection
b Front connection (refrigeration)
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing.
▪ After making 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.
Front connection
1 Remove the knockout and connect the piping to the outdoor
unit.
A
B
b
a
A Stop valve (gas – refrigeration)
B Stop valve (liquid – refrigeration)
a Gas piping
b Liquid piping
2 If applicable, remove the knockout and connect the piping to the
capacity up unit.
CO₂ Conveni-Pack outdoor unit and capacity up unit
d
c
LRYEN10A7Y1+LRNUN5A7Y1
4P605461-1B – 2020.08