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PRE-START-UP
Proceed
as follows
to inspect
and
prepare
the
unit
for initial
start
up:
1. Remove
all access
panels.
2. Read
and
follow
instructions
on all WARNING,
CAU-
TION,
and INFORMATION
labels
attached
to, or shipped
with,
unit.
3. Make
the
following
inspections:
a.
Inspect
for shipping
and
handling
dan]ages
such
as
broken
lines,
loose
parts,
disconnected
wires,
etc.
b.
Inspect
for oil at all refi'igerant
tubing
connections
and
on unit
base.
Detecting
oil generally
indicates
a
refi'igerant
leak.
Leak-test
all refrigerant
tubing
con
nections
using
electronic
leak
detector,
halide
torch,
or liquid
soap
solution.
If a refi'igerant
leak
is de-
tected,
see
Check
for
Refi'igerant
Leaks
section
on
this
page.
c. Inspect
all field
and
factm T wiring
connections.
[3e
sure
that
connections
are
completed
and
tight.
d.
Inspect
coilfins.
Ifdamaged
during
shipping
and
han-
dling,
carefiflly
straighten
fins
with
a fin comb.
4. Verify
the
following
conditions:
a. Before
lighting
the unit
for the first time,
perform
the following:
If the gas supply
pipe was not purged
before
connecting
the unit,
it will be full of air. It is
recommended
that
the ground
joint
union
be loos-
ened, and the supply
line be allowed
to purge
until
the odor of gas is detected.
Never purge gas lines into
a combustion
chamber,
hnmediately
upon detection
of gas odor, retighten
the union.
Allow 5 minutes
to
elapse,
then light unit.
b. Make
sure that
condenser-fan
blade
is correctly
po-
sitioned
in fan orifice. Leading
edge of condenser
fan
blade should
be '/z in. maximum
fl'om plastic
fan ori
rice (see Fig. 18).
c. Make sure that
air filter(s)
is in place.
d. Make
sure that
condensate
drain
trap
is filled with
water
to ensure
proper
drainage.
e. Make sure that all tools and miscellaneous
loose parts
have been removed.
_i_
-,-1/2 IN, MAX
\l
]_
/
MOTOR SHAFT
Fig. 18 -- Fan Blade Clearance
START-UP
I. CHECK FOR REFRIGERANT
LEAKS
Proceed
as follows to locate and repair
a refrigerant
leak and
to charge
the unit:
f. Locate leak and make sure that refrigerant
system
pres-
sure
has been relieved
and
reclaimed
fi'om both high
and low pressure
ports.
2. Repair
leak following
accepted
practices.
NOTE:
Install
a filter
drier whenever
the system
has been
opened
for repair.
3. Add a small charge
of R 22 refi'igerant
vapor
to system
and leak test unit.
4. Evacuate
and reclaim
refrigerant
from refrigerant
sys-
tem if additional
leaks are not found.
5. Charge
unit with R-22 refi'igerant,
using a volumetric
charging
cylinder
or accurate
scale. Re[ki" to tlnit Foth\q
piote [bF r'_quiF_(t c'hofge. Be sure to add extra
refriger-
ant to compensate
for internal
volume
of filter drier.
--16--
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