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normal forthese weather
conditions.
Donot a ttempt toremove the
icefrom the unit g rille. This condition willnot a ffect the proper
function ofthe unit a nd willclear within a few days.
Emergency
Heating
Mode
In the event of primary
unit heat failure, the emergency
heat mode
allows your supplemental
heating
source to keep your home or of-
fice warm until your unit can be serviced.
Contact your dealer in the
event of primary
unit heat failure.
Emergency
Cooling
Mode
In the event of UI failure, the emergency
cooling
mode allows your
unit to keep your home or office cool until your UI can be serviced.
Contact
your dealer for more information.
MAINTENANCE
AND SERVICE
This section
discusses
maintenance
that should be performed
by
your dealer and care you, as the owner, may wish to handle for your
new unit.
Routine
Maintenance
All routine maintenance
should be handled
by skilled, experienced
personnel.
Your dealer can help you establish
a standard procedure.
FIRE,
EXPLOSION
HAZARD
Failure to follow this warning
could result in death, personal
injury and/or property
damage.
Do not store or use gasoline
or other flammable
vapors
and
liquids in the vicinity
of this or any other appliance.
To assure proper functioning
of the unit, flow of condenser
air must
not be obstructed
from reaching
the unit. Clearance
from the top of
the unit is 48 in. (1219 mm)Clearance
of at least 36 in. (914 mm) is
required
on sides except
the power
entry side (42 in. clearance)
(1067 mm) and the duct side (12 in. minimum
clearance)
(305 mm).
Maintenance
and Care
for the Equipment
Owner
Before proceeding
with those things you might
want to maintain
vourself,
please carefully
consider
the following:
FIRE, EXPLOSION,
ELECTRICAL
SHOCK
HAZARD
Failure to follow this warning
could result in personal
injury,
death or property
damage.
1. TURN
OFF ELECTRICAL
POWER
TO YOUR
UNIT
BEFORE
SERVICING
OR
PERFORMING
MAINTENANCE.
2. When removing
access panels or performing
maintenance
functions
inside your unit, be aware of sharp sheet metal
parts and screws. Although
special care is taken to reduce
sharp
edges
to a minimum,
be extremely
careful
when
handling
parts or reaching
into the unit.
Air Filters
The air filter(s)
should
be checked
at least every
3 months
and
changed
or cleaned whenever
it becomes
dirty. Dirty filters produce
excessive
stress on the blower
motor and can cause the motor to
overheat
and shut down.
This unit must have an air filter in place before it can be operated.
These filters should be located in at least one of two places. In many
applications,
the
installer
will
provide
return
air filter
grilles
mounted
on the wall or ceiling
of the conditioned
structure.
In the
instance
of filter grilles, the filters can simply be removed
from the
grille and replaced.
The other typical application
is an accessory
filter rack installed in-
side the unit itself. The following
information
is given to assist in
changing
filters used in these internal
filter racks.
Table 1 indicates
the correct
filter size for your unit.
Table
I--Indoor
Air Filter
Data
Unit Size
Filter Size
50DT024-030
20x24x1 (508x610x25mm)
50DT036
24x30xl
(610x762x25mm)
50DT042-060
24x36x1 (610x914x25mm)
To replace
or inspect filters in accessory
filter rack:
1. Remove
the filter access panel (See Fig. 2) using a 5/16-in.
nut driver.
2. Remove
the filter(s) by pulling it out of the unit. If the filter(s)
is dirty, clean or replace with a new one.
When installing
the new filter(s), note the direction
of the airflow ar-
rows on the filter frame.
If you have difficult?,
locating
your air filter(s)
or have questions
concerning
proper
filter maintenance,
contact
your dealer
for in-
structions.
When replacing
filters, always use the same size and type
of filter that was supplied
originally
by the installer.
ACCESS
PANEL
FILTER
ACCESS
PANEL _
*For accessory
filter
rack
099094
Fig.
2 - Accessory
Filter
Rack
Access
Panel
(Optional
Louvered
Panels
Shown)
FIRE
AND UNIT
OPERATION
HAZARD
Failure to follow this warning
could result in personal
injury,
death or property
damage.
Never
operate
your
unit
without
filters
in
place.
An
accumulation
of dust and lint on internal parts of your unit can
cause loss of efficiency.
Fans and Fan Motor
Periodically
check
the condition
of fan wheels
and housings
and
fan- motor shaft bearings.
Contact your dealer for the required annu-
al maintenance.
Indoor and Outdoor
Coils
Cleaning
of the coils should only be done by qualified
service per-
sonnel. Contact
your dealer for the required
annual maintenance.
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