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SAFETY CONSIDERATIONS
Installation
and s ervicing
ofthis equipment
can be hazardous
due to
mechanical
and electrical
components.
Only trained and qualified
personnel
should install, repair, orservice this equipnmnt.
Untrained
personnel
can perform basic maintenance
functions
such
as cleaning and replacing
airfilters. All other operations
must be
performed
bytrained service personnel.
When w orking o nthis
equipnmnt,
observe
precautions
inthe literature,
ontags, and on
labels a ttached to or shipped withtheunitandother s afety
precautions
that may apply.
Follow allsafety codes. Installation
must beincompliance
with
local and national building codes. Wear safety glasses,
protective
clothing, and work gloves. Have f ire extinguisher
available.
Read
these instructions
thoroughly
and follow allwarnings orcautions
included inliterature
andattached
tothe unit.
Recognize
safety information.
This isthe safety-alert
symbol '_.
When you see t his symbol on the unit a nd ininstructions
ormanuals,
be alert tothe potential forpersonal
injury. Understand
these signal
words: DANGER.
WARNING,
and CAUTION.
These words are
used with the safety-alert
symbol. DANGER identifies
the most se-
rious h azards
which w illresult insevere personal
injury o rdeath.
WARNING
signifies hazards
which c ould r esult inpersonal
injury
ordeath. CAUTION isused toidentify unsafe practices
which m ay
result inminor p ersonal
injury orproduct and property damage.
NOTE isused t ohighlight suggestions
which w illresult in en-
hanced installation,
reliability, oroperation.
ELECTRICAL
SHOCK H AZARD
Failure tofollow this warning could r esult inpersonal
injury
ordeath.
Before installing orservicing system, always turn offmain
power tosystem. There may bemore t han one disconnect
switch. Turn o ffaccessory
heater power switch ifapplicable.
UNIT OPERATION
AND SAFETY H AZARD
Failure tofollow this warning could r esult inpersonal
injury
orequipment
damage.
Puron ( R-410A) systems
operate athigher pressures
than
standard R-22systems. DO NOTuseR-22service
equipment
orcomponents
onPuron (R-410A) equipment.
Ensure service equipment
israted forPuron (R-410A).
INTRODUCTION
The 50DU packaged
airconditioner
isfullyself-contained
and
designed
foroutdoor installation
(See F ig.1).Standard
units a re
shipped inahorizontal-discharge
configuration
forinstallation
on
aground-level
slab o rdirectly onthe ground iflocal codes permit.
Standard
units c an beconverted
todownflow (vertical) discharge
configurations
forrooftop applications.
RECEIVING
AND INSTALLATION
Step
1 --Check
Equipment
IDENTIFY
UNIT
The unit model
number
and serial number
are printed
on the unit
informative
plate. Check this information
against shipping
papers.
INSPECT
SHIPMENT
Inspect for shipping
damage while unit is still on shipping
pallet. If
unit appears to be damaged
or is torn loose from its anchorage,
have
it examined
by transportation
inspectors
before removal.
Forward
claim papers
directly
to transportation
company.
Manufacturer
is
not responsible
for any damage
incurred
in transit. Check all items
against shipping
list. Immediately
notify the nearest Carrier office
if any item is missing.
To prevent
loss or damage,
leave all parts in
original packages
until installation.
Step 2--Provide
Unit Support
For hurricane
tie downs,
contact
distributor
for details
and PE
(Professional
Engineering)
Certificate,
if required.
ROOF CURB
Install accessory
roof curb in accordance
with instructions
shipped
with curb (See Fig. 4). Install
insulation,
cant strips, roofing,
and
flashing.
Ductwork
must be attached
to curb.
IMPORTANT:
The gasketing
of the unit to the roof curb is critical
for a water tight seal. Install gasketing
material
supplied
with the
roof curb. Improperly
applied
gasketing
also can result in air leaks
and poor unit performance.
Curb should be level to within 1/4 in. (See Fig. 2). This is necessa_
for unit drain
to function
properly.
Refer to accessory
roof curb
installation
instructions
for additional
information
as required.
3
MAXIMUM
ALLOWABLE
DIFFERENCE
(in.)
B
A-B
B-C
A-C
1/4
1/4
1/4
099065
Fig, 2 - Unit Leveling
Tolerances
SLAB MOUNT
Place the unit on a solid, level concrete
pad that is a minimum
of 4
in. thick
with
2 in.
above
grade.
The
slab
should
extend
approximately
2 in. beyond
the casing on all 4 sides of the unit (See
Fig. 3). Do not secure the unit to the slab except when required
by
local codes.
EVAR COIL
COND. COIL
}
t OPTIONAL
'_1 II
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Fig. 3 - Slab Mounting
Detail
C99096
GROUND
MOUNT
The unit may be installed
either on a slab or placed
directly
on the
ground if local codes permit. Place the unit on level ground prepared
with gravel for condensate
discharge.
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