Guidelines When Installing A Sight Glass; Guidelines When Installing A Dryer; To Connect The Refrigerant Piping To The Outdoor Unit - Daikin LRMEQ4BY1 Installer And User Manual

6 Installation
2 Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
p < p >
A B
f
a
d
N2 R410A
b c e
a Pressure reducing valve
b Nitrogen
c Weighing scales
d Refrigerant R410A tank (siphon system)
e Vacuum pump
f Liquid line stop valve
g Gas line stop valve
A Valve A
B Valve B
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,
disconnect the charge hose and close the service ports
5 Cut off the lower part of the gas and liquid stop valve pipes
along the black line. Use an appropriate tool (e.g. a pipe cutter,
a pair of nippers).
WARNING
Never remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
6 Wait until all oil has dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
6.4.7

Guidelines when installing a sight glass

Install a sight glass on the liquid piping:
Diameter 9.5 mm
Installer and user reference guide
18
g
Where/how Install the sight glass before the dryer, as near
to the outdoor unit as possible. Install
horizontally.
a Sight glass
b Dryer
When brazing Follow the brazing instructions in the sight
glass manual.
6.4.8

Guidelines when installing a dryer

NOTICE
Do NOT operate the unit without a dryer installed.
Possible consequence: Equipment malfunction.
Install a dryer on the liquid piping:
Dryer type 80 g (100% molecular sieve equivalent)
(DML083/DML083S: Danfoss made)
Where/how Install the dryer after the sight glass, as near to
the outdoor unit as possible. Install
horizontally.
a Sight glass
b Dryer
When brazing Follow the brazing instructions in the dryer
manual.
Remove the dryer cap immediately before
brazing (to prevent absorption of airborne
moisture).
If dryer paint burnt during brazing, repair it. For
repair paint details, contact the manufacturer.
Flow direction If the dryer specifies a flow direction, install
accordingly.
6.4.9 To connect the refrigerant piping to the
outdoor unit
NOTICE
▪ 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.
1 Do the following:
▪ Remove the service cover (a) with screw (b).
▪ Remove the piping intake plate (c) with screw (d).
a b
a b
LRMEQ+LRLEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1A – 2018.09