A
PD MANUAL
IOM-39
25 of 36
Aug 99 R1
MAINTENANCE
Warning:
This
unit
is
connected
to
high
voltages.
Electrical
shock
or
death
could
occur
if
instructions
are
not
followed.
This
equipment
contains
moving
parts
that
can
start
unexpectedly.
Injury
or
death
could
occur
if
instructions
are
not
followed.
All
work
should
be
performed
by
a
qualified
technician.
Always
disconnect
and
lock
out
power
before
servicing.
DO
NOT
bypass
any
interlock
or
safety
switches
under
any
circumstances.
Warning:
Follow
the
cleaning
instructions
and
recommended
inspection
schedule
to
reduce
the
risk
of
mold
or
other
bacterial
growth.
Property
damage
or
personal
injury
claims
may
result
from
mold
or
biological
growth
arising
from
improper
installation,
inadequate
maintenance,
or
failure
to
inspect.
Engineered
Air
has
no
responsibility
for
and
makes
no
express
or
implied
warranties
regarding
mold
or
bacterial
growth
or
any
other
indoor
air
quality
issues.
If
mold
or
biological
growth
is
present,
determine
and
fix
the
cause.
Properly
remove
and
dispose
of
the
contamination.
Properly
clean
and
sanitize
the
affected
area
using
only
approved
sanitizers
suitable
for
HVAC
equipment.
To
provide
a
maintenance
history,
It
is
recommended
that
the
owner
have
a
maintenance
file
for
each
unit.
The
following
maintenance
instructions
are
to
be
carried
out
each
spring
and
fall
or
as
otherwise
indicated
by
qualified
service
personnel.
Caution:
Label
all
wires
prior
to
removal
when
servicing
controls
or
critical
components.
Wiring
errors
can
cause
improper
and
dangerous
operation.
Verify
proper
operation
after
servicing.
ELECTRICAL
1.
Check
all
wiring
for
loose
connections.
2.
Check
voltage
at
unit
(while
in
operation).
3.
Check
amperage
draw
against
unit
rating
plate.
4.
Where
possible,
all
contactors
should
be
inspected
to
ensure
that
contacts
are
clean
and
are
making
good
contact.
If
contacts
are
abnormally
pitted
or
burned
badly,
replace
contactor.
Single
phasing
and
motor
burnouts
can
result
from
bad
contacts.
BELT
ADJUSTMENT
For
maximum
belt
and
bearing
life,
pulley
alignment
and
belt
tension
must
be
properly
maintained.
Only
replace
with
belts
of
the
proper
type
and
size.
