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IMPORTANT:
[]nits have high ambient operating
limits. If limits
are exceeded,
the units will automatically
lock the compressor
out
of
operation.
Manual
reset
will
be
required
to
restart
the
compressor.
INSTALLATION
Step 1 -- Provide Unit Support
Roof Curb
Assemble
or install
accessory
roof
curb
in
accordance
with
instructions
shipped
with
this
accessory.
(See
Fig.
1.) Install
insulation,
cant strips,
roofing,
and counter
flashing
as shown.
Ductwork
can be installed
to roof curb before unit is set in place.
Ductwork
must be attached
to curb and not to unit. Curb must be
level. This
is necessary
to permit
unit drain
to function
properly.
Unit leveling
tolerance
is - 1/16-in.
per linear ft in any direction.
Refer
to
Accessory
Roof
Curb
Installation
Instructions
for
additional
information
as required.
When accessory
roof curb is used, unit may be installed
on class A,
B, or C roof covering
material.
Carrier roof curb accessories
are for
flat roofs or slab mounting.
IMPORTANT:
The gasketing
of the unit to the roof curb is critical
for a watertight
seal. Install
gasket with the roof curb as shown
in
Fig. 1. Improperly
applied
gasket
can also result
in air leaks
and
poor unit performance.
Do not slide unit to position
on roof curb.
Alternate
Unit Support
When
a curb cannot
be used,
install
unit on a noncombustible
surface.
Support
unit with sleepers,
using unit curb support
area. If
sleepers
cannot be used, support
long sides of unit with a minimum
of 3 equally
spaced
4-in. x 4-in.
pads on each side.
Slab Mount (Horizontal Units Only)
Provide
a level
concrete
slab that extends
a minimum
of 6 in.
beyond
unit cabinet.
Install
a gravel
apron in front of condenser
coil air inlet to prevent
grass and foliage
from obstructing
airflow.
NOTE:
Horizontal
units
may
be
installed
on a roof
curb
if
required.
Step 2 -- Remove
Shipping
Rails
Remove
shipping
rails prior
to lowering
unit onto roof curb. See
Fig. 2. The rails are attached to the unit at both the return end and
condenser
end. Remove
the screws from both ends of each rail. Be
careful
not
to drop
the rails
onto
any surface
that could
be
damaged.
Discard
the rails. It is important
to replace
the screws
into the unit to avoid any air or water leakage.
Step 3 -- Rig and Place Unit
Inspect unit for transportation
damage.
See Tables 1-3 for physical
data. File any claim with transportation
agency.
[]NIT
DAMAGE
HAZARD
Failure
to follow
this caution
may
result
in equipment
damage.
All panels
must
be in place when
rigging.
Unit
is not
designed
for handling
by fork truck.
Do
not drop
unit; keep
upright.
Use spreader
bars over
unit to
prevent
sling
or cable damage.
Rollers
may be used to move
unit
across a roof. Level by using unit frame
as a reference;
leveling
tolerance
is - 1/16-in.
per linear ft in any direction.
See Fig. 3 for
additional
information
and unit rigging
weight.
Four
lifting
holes are provided
in the unit base rails as shown
in
Fig. 3. Refer to rigging
instructions
on unit.
Positionin_
Maintain
clearance,
per Fig. 4, around and above unit to provide
minimum
distance
from combustible
materials,
proper
airflow, and
service
access.
Do not install unit in an indoor
location.
Do not locate
air inlets
near exhaust
vents or other sources
of contaminated
air.
Although
unit is weatherproof,
guard
against
water
from
higher
level runoff
and overhangs.
Roof
Mount
Check
building
codes
for weight
distribution
requirements.
Unit
operating
weight
is shown
in Table 1.
Installation
Onto Curb
The 50PM
units are designed
to fit on the accessory
full perimeter
curb.
Correct
placement
of the unit onto
the curb
is critical
to
operating
performance.
To aid
in
correct
positioning,
3/8-in.
diameter
locating
holes
have
been
added
to the unit base
rails.
When
placing
the unit,
these holes
should
line up with
the roof
curb edge as shown
in Fig. 5 and 6, to assure proper
duct opening
alignment.
For placement
on the curb,
use the alignment
holes
located
approximately
2-in.
from
the end of the base
rail on the
return
end of the unit.
See labels
on the side of the unit for more
details.
[]NIT
OR PROPERTY
DAMAGE
HAZARD
Failure
to follow
this caution
may result
in equipment
or
property
damage.
Do not allow the shipping
rail to drop on the roof surface.
Damage
to the roof surface may result.
[]NIT
DAMAGE
HAZARD
Failure to follow this caution may result in equipment
damage,
Do not slide unit to position when it is sitting on the curb.
Curb gasketing material may be damaged and leaks may
result,
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