47
≥8
Invalid
11.2
Multi
‐
system
Projects
For
projects
with
multiple
refrigerant
systems,
each
independent
refrigeration
system
(i.e.
each
system
of
up
to
four
outdoor
units
and
their
connected
indoor
units)
should
be
given
a
test
run
independently,
before
the
multiple
systems
that
make
up
a
project
are
run
simultaneously.
11.3
Pre
‐
commissioning
Checks
Before
turning
on
the
power
to
the
indoor
and
outdoor
units,
ensure
the
following:
1.
All
indoor
and
outdoor
refrigeration
piping
and
communication
wiring
has
been
connected
to
the
correct
refrigeration
system
and
the
system
to
which
each
indoor
and
outdoor
unit
belongs
is
clearly
marked
on
each
unit
or
recorded
in
some
other
suitable
place.
2.
Pipe
flushing,
gastightness
testing
and
vacuum
drying
have
been
satisfactorily
completed
as
per
instructions.
3.
All
condensate
drain
piping
is
complete
and
a
watertightness
test
has
been
satisfactorily
completed.
4.
All
power
and
communication
wiring
is
connected
to
the
correct
terminals
on
units
and
controllers.
(Check
that
the
different
phases
of
the
3
‐
phase
power
supplies
have
been
connected
to
the
correct
terminals).
5.
No
wiring
has
been
connected
in
a
short
‐
circuit.
6.
The
power
supplies
to
indoor
and
outdoor
units
have
been
checked
and
the
power
supply
voltages
are
within
±10%
of
the
rated
voltages
for
each
product.
7.
All
control
wiring
is
0.75mm
2
three
‐
core
shielded
cable
and
the
shielding
has
been
grounded.
8.
The
outdoor
units’
address
and
capacity
switches
are
set
correctly
(see
Installation
Manual,
11.1
“Outdoor
Unit
Address
and
Capacity
Settings”)
and
all
other
indoor
and
outdoor
unit
field
settings
have
been
set
as
required.
9.
The
additional
refrigerant
charge
has
been
added
as
per
Installation
Manual,
8
“Charging
Refrigerant”.
Note:
In
some
circumstances
it
may
be
necessary
to
run
the
system
in
cooling
mode
during
the
refrigerant
charging
procedure.
In
such
circumstances,
points
1
to
8
above
should
be
checked
before
running
the
system
for
the
purpose
of
charging
refrigerant
and
the
outdoor
unit
liquid,
gas
and
oil
balance
valves
should
be
opened.
During
commissioning,
it
is
important
that
you:
Keep
a
supply
of
R410A
refrigerant
at
hand.
Keep
the
system
layout,
system
piping
and
control
wiring
diagrams
at
hand.
11.4
Commissioning
Trial
Runs
11.4.1
Commissioning
test
run
of
single
refrigerant
system
Once
all
the
pre
‐
commissioning
checks
in
Installation
Manual,
11.3
“Pre
‐
commissioning
Checks”
have
been
completed,
a
test
run
should
be
performed
as
described
below
and
a
V5
X
Series
System
Commissioning
Report
(see
Installation
Manual,
12
“Appendix
to
Installation
Manual
–
System
Commissioning
Report”)
should
be
completed
as
a
record
of
the
operating
status
of
the
system
during
commissioning.
Note:
When
running
the
system
for
commissioning
test
runs,
if
the
combination
ratio
is
100%
or
less,
run
all
the
indoor
units
and
if
the
combination
ratio
is
more
than
100%,
run
indoor
units
with
total
capacity
equal
to
the
total
capacity
of
the
outdoor
units.
The
test
run
procedure
is
as
follows:
1.
Open
the
outdoor
unit
liquid,
gas
and
oil
balance
valves.
2.
Turn
on
the
power
to
the
outdoor
units.
3.
If
manual
addressing
is
being
used,
set
the
addresses
of
each
indoor
unit.
4.
Leave
the
power
on
for
a
minimum
of
12
hours
prior
to
running
the
system
to
ensure
that
the
crankcase
heaters
have
