Trane CGAH Series User Manual

3.
4.
5.
6.
Unit
start-up
Before
start
up, carry out all operations
on check list
and
follow
the instructions
below
to
ensure
that the
unit
is
correctly installed
and
ready
to operate.
The installer
must
check
all the following
points
before
calling in
the Trane servicing
Department
to
put
the
equipment into
service.
1.
Chilled water
circuit
ready
to
operate,
filled
with
water,
pressure
test
carried
out,
purged,
filter
cleaned
after 2 hours
operation
of
the chilled water
pump.
2.
Thermometers
and
pressure
gauges
installed
on
chilled water
circuit.
Chilled watér
pump
interconnected
to control
panel.
Check
that
all electrical
connections
are
clean
and
sound.
Check
that
circuits comply
with
the
wiring
diagram
supplied.
Technical
data shown
at
the top
of
the wiring
diagram
should
match
the information
shown on the
unit nameplate
plate.
Check
that
mains
power
supply switch
is
sound.
Check
compressor
oil level
at rest.
The level
should
reach
at least
halfway
up indicator
located
on
housing.
See fig
4. for
correct
level.
Check direction
of
rotation
of
compressors
using
phasemeter.
8. On start-up
of
each motor
in
the
system,
check
the
direction
of rotation
and
operation
of
all
the
components
they
drive.
9. Check extent
of
pressure
drops
through
evaporator,
so that
the value
matches
values
shown
on
graphs
A
and B.
10.
Check that
there is
sufficient
demand
for
cooling
on
the
day of start-up
{around
50%
of nominal
load).
Differential
water
pressure
switch:
lf the unit
pressure
switch is
adjustable,
please
refer
to
information
sheet
available
from
your
Trane
agency,
and
adjust the setpoint
as required.
Some
units
have
preset
pressure
switches
already fitted,
and these
should
not
be
changed.
Figure
4
-
Compressor
oil level
Preparation
Before
stafting
up
the
system,
carry
out
the following
checks and
operations:
1.
Before
making
any
eleictrical
connection,
insure
that
the isolation
resistance
of
all
power
supply
terminals
to
ground
complies
with
standards
and
regulations
in
force.
Check
the isolation
c,f
all
etectric
motors
using
a
500 V
DC
megohmeter
which
meets
manufacturer's
specifications.
2.
Check
that all
electrical
connections
are
clean
and
sound.
Insure
that
circuits
comply
with
the
unit wiring
diagram.
The
technical
data
shown
at
the top of
the
wiring
diagram
should
match
the information
shown
on the unit nameplate.
Switch
on
mains
pow€rt,
supply
switch.
Check that
unit
power
supplies
match
rated
input
power.
5. Insure
all water
and
refrigerant
vatves
are in
service
positions,
and
start
up
water
circulation
pumps.
6. Reset
all manually
set
control
devices.
7. Insure
sensor
is
properly
installed
in its
bulbwell
and
submerged
in
heat
conducting
product.
Check fixing
of
capillary
tubes
(chr:ck
protection
from vibration
and from wear,
ancl
insure
that
they are
not
damaged).
Start-up
1.
Start-up
chilled
water
pump
or
pumps.
2.
Start-up
each
compressor
turning
switches
S1,
52,
53, or S4
separately.
lf
one
of
the
compressors
will
not start
up,
check
the foltowing points:
a)
SMM control
modute
should
be
in
'cooting.
position.
b)
Connection
between
the unit
and
chiiled
water
pump
contactor
nlust
be
made.
7.
3.
4.
Max.
oil
level
Min.
oil level
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Trane CGAH Series Specifications

General

Brand	Trane
Model	CGAH Series
Category	Chiller
Language	English