Thorough
leakage
detection
using
a
suitable
detector
should
be
carried
out
on
the
condenser
unit.
After
these
tests,
the
gas
must
be
removed.
Fit
the
drier
cartridges
in
their
casing.
Dehydration
of
circuits
This
operation
must
be
carried
out
with
all
valves
open
(including
solenoid
valves)
with
connection
to
a
vacuum
pump:
-
of
the
low
pressureside
-
of
the
high
pressureside
The
quality
of
drying
should
not
be
judged
by
the
speed
at
which
the
level
of
vacuum
is
reached
but
on
the
effective
time
it
is
held
(24
hours
at
0.7
mbar
is
a
good
standard).
The
total
increase
in
pressure
during
that
period
should
not
be
more
than
2.6
mbar.
The
residual
moisture
in
the
system
should
be
less
than
20ppm.
When
the
installation
is
under
vacuum,
an
insulation
check
of
the
motor
should
not
be
carried
out
nor
should
the
compressors
be
started
before
at
least
1
bar
of
fluid
pressure
is
reintroduced.
This
is
to
prevent
motor
winding
damage.
Oil
level
checks
After
a
minimum
of
2
hours
of
operation,
check
the
oil
compressor
levels.
1/2
sight
glass
working.
Levels
should
never
exceed
the
manufacturers’
recommendations.
WARNING:
Optional
Oil
separator
is
mounted
without
oil
charge.
Complement
must
be
added
by
installer
during
commissioning.
Oils
The
compressor
Manufacturer's
recommendations
should
be
followed
according
to
the
type
of
refrigerant.
The
use
of
colorants
or
UV
tracers
as
leak
detectors
in
the
oil,
is
not
allowed.
Oil
Refrigerant
Mobil
Arctic
EAL
22
CC
ICI
Emkarate
RL32CF
R134a
/
R407F
/
R404A/
R507
This
table
is
not
exhaustive,
but
summarises
the
principal
oils
used.
If
any
other
oil
is
to
be
used,
we
would
advise
contacting
PROFROID
or
the
compressor
manufacturers.
Refrigerant
fluid
charge
It
is
possible
to
charge
in
liquid
phase
when
the
installation
is
under
vacuum
through
the
charging
valve
provided
on
the
liquid
receiver
(depending
on
models).
The
charging
bottle
must
remain
connected
to
this
valve
permanently
during
the
whole
start-up
period
to
enable
instant
adjustment
while
charging
the
installation
Fan
checks
Direction
of
rotation
Check
that
the
fan
is
rotating
in
the
correct
direction,
Suction
on
the
coil.
Pre-Setting
of
Control
Systems
-
Pre-set
the
LP
regulation
pressure
switch
and
test
manually.
-
Pre-set
the
fans
speed
control.
The
condensing
pressure
is
regulated
through
the
fans
speed
control
that
fluctuates
speed
of
the
fan
motors
according
to
the
setting
chosen.
Device
Fonct.
Fluid
Applic.
Pre-set
LP
pressure
switch
Comp.
Safety
R404A
R507
R407F
Medium
Cutting : 1,5 bar
Engagement :3 bar
Low
Cutting : 0,3 bar
Engagement :1,0 bar
Device
Fonct.
Fluid
Applic.
Pre-set
LP
pressure
switch
Comp.
saferty
R134a
Medium
Temp
26
Cutting: 0.3 bar
Engagement :1,0 bar
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