Protection Against Contamination When Installing Pipes; Pipe Connection; Drier Installation; Connecting The Refrigerant Piping - Daikin LRLEQ5AY1 Manuel D'installation

6-2 Protection against contamination when
installing pipes
Protect the piping to prevent moisture, dirt, dust, etc. from entering
the piping.
Place Installation period
More than a month
Outdoor
Less than a month
Indoor Regardless of the period
Note
Exercise special caution to prevent dirt or dust when passing piping
through holes in walls and when passing pipe edges to the exterior.

6-3 Pipe connection

• Be sure to perform nitrogen permutation or nitrogen blow when brazing.
Refrigerant pipe
Location to
be brazed
Nitrogen
Taping
Handy valve
Brazing without performing nitrogen permutation or nitrogen blow
into the piping will create large quantities of oxidized film on the
inside of the pipes, adversely affecting valves and compressors in
the refrigerating system and preventing normal operation.
• The pressure regulator for the nitrogen released when doing the
brazing should be set to 0.02 MPa (about 0.2kg/cm
feel a slight breeze on your cheek).
Note
Do not use anti-oxidants when brazing the pipe joints.
Residue can clog pipes and break equipment.

6-4 Drier installation

CAUTION
This product requires that a drier be installed on liquid piping on site.
(Operating the unit without a drier installed may result in equipment
failure.)
Select a drier from the following chart:
Model
LRMEQ5AY1, LRLEQ5AY1 80g (100% molecular sieve equivalent)
LRMEQ6AY1, LRLEQ6AY1 (DML083/DML083S : Danfoss made)
LRMEQ8AY1, LRLEQ8AY1
160g (100% molecular sieve equivalent)
LRMEQ10AY1, LRLEQ10AY1
(DML163/DML163S : Danfoss made)
LRMEQ12AY1, LRLEQ12AY1
LRMEQ15AY1, LRLEQ15AY1 160g (100% molecular sieve equivalent)
LRMEQ20AY1, LRLEQ20AY1 (DML164/DML164S : Danfoss made)
• Install the drier in a horizontal orientation wherever possible.
• Install the drier as close to the outdoor unit as possible.
• Remove the drier cap immediately before brazing (to prevent
absorption of airborne moisture).
• Follow instructions in the drier instruction manual concerning drier
brazing.
• Repair any burning of drier paint that occurs during drier brazing.
Contact the manufacturer for more information about paint for
repair use.
• Flow direction is specified for some type of the dryer.
Set the flow direction according to the operation manual of the
dryer.
English
Protection method
Pinch the pipe
Pinch or tape the pipe
Regulator
Nitrogen
2
:Enough to
Required dryer core
(recommended type)

6-5 Connecting the refrigerant piping

CAUTION
• In addition to gas and liquid shutoff valves, this unit has a mainte-
nance shutoff valve (see diagram below).
• Do not operate the maintenance shutoff valve*.
(The factory setting for the maintenance shutoff valve is "open."
During operation, always leave this valve in the open position.
Operating the unit with the valve in the closed position may cause
the compressor to fail.)
* Maintenance shutoff valve
* Maintenance shutoff valve
Liquid side shutoff valve
(provided with service port)
Gas side shutoff valve
(provided with service port)
1.
Directions to bring out the pipes
The local interunit piping can be connected either forward or to the
sides (taken out through the bottom) as shown in the following figure.
When passing out through the bottom, use the knock hole in the bottom frame.
Front connection
Left-side connection
Precautions when knocking out knock holes
• Open knock hole in the base frame by drilling the 4 concave
around it with a 6mm bit.
Knock hole
Drill
• Be sure to avoid damaging the casing
• After knocking out the holes, we recommend you remove any
burrs and paint them using the repair paint to prevent rusting.
• When passing electrical wiring through the knock holes, protect
the wiring with a conduit or bushings, making sure not to damage
the wiring.
Right-side connection
Concave section
(4 places)
7