Belk_re pel'fl_rming service or maintenance operations on
system, turn o1"1power to unit. Turn off accessory heater
power switch, if applicable. Electrical shock can cause
personal injury.
Recognize salety in%rmation. This is the sali:ty-alert symbol/_ .
When you see this symbol in instructions or manuals, be alert to
the potential lk_rpersonal injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the sali:ty-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used
to identily unsali: practices which would result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
These instructions cover mininmm requirements and conli_rm to
existing national standards and salety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept tapwith changing residen-
tial construction practices. We require these instructions as a
mininmm lk_ra salt: installation.
iNTRODUCTiON
The 50GS and 50GX units (see Fig. 1)are fully sellCcontained, and
designed Ik_r outdoor installation. See Figs. 2 and 3 Ik_r unit
dimensions. All unit sizes have discharge openings liar both
horizontal and downflow conl'igurations, and are factory shipped
with all downflow duct openings covered . Units may be installed
either on a rooftop, ground-level cement slab, or directly on the
ground if local codes permit. (See Fig. 4A Ii}l"roof curb dimen-
sions.)
RECEIVING AND INSTALLATION
Step liCheck Equipment
IDENTIFY UNIT
The unit model number and serial number are stamped on the unit
identification plate. Check this inli_rmation against shipping pa-
pers.
INSPECT SHIPMENT
Inspect liar shipping damage while unit is still on shipping pallet.
11'unit appears to be damaged or is torn loose fi'ona its anchorage,
have it examined by transportation inspectors belk)re removah
Forward claim papers directly to transportation company. Manu-
facturer is not responsible lk)r any damage incurred in transit.
Check all items against shipping list. Immediately notify the
nearest Carrier Air Conditioning olTice if' any item is missing. To
prevent loss or damage, leave all parts in original packages until
installation.
Step 2iprovide Unit Support
ROOF CURB
Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 4A). 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
liar a watertight seal. Install gasketing material supplied with the
roof curb. hnproperly applied gasketing also can result in air leaks
and poor unit perlormance.
Curb should be level to within 1/4 in. (See Fig. 5A). This is
necessary liar unit drain to function properly. Relier to accessory
roof curb installation instructions lk_r additional inlk_rmation as
required.
SLAB MOUNT
Place the unit on a solid, level concrete pad that is a nfininmm of
4 in. thick with 2in. above grade (See Fig. 5B). The slab should
extend approximately 2 in. beyond the casing on all 4 sides of the
unit. Do not secure the unit to the slab e.rcvpt when required by
local codes.
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 liar condensate discharge.
Step a--Provide Clearances
The required minimum service clearances are shown in Fig. 2 & 3.
Adequate ventilation and outdoor air lnust be provided. The
outdoor fan draws air through the outdoor coil and discharges it
through the top fan grille. Be stare that the fan discharge does not
recirculate to the outdoor coil. Do not locate the unit in either a
corner or under an overhead obstruction. The minimum clearance
under a partial overhang (such as a normal house overhang) is 36
in. above the unit top. The maximum horizontal extension of a
partial overhang lnust not exceed 48 in. For extended overhangs,
provide a nfininmm clearance of 48 in.
IMPORTANT: Do not restrict outdoor airflow. An air restriction
at either the outdoor-air inlet or the fan discharge may be
detrimental to compressor liti_.
Do not place the unit where water, ice, or snow I]'om an overhang
or roof' will damage or flood the unit. Do not install the unit on
carpeting or other combustible materials. Slab-mounted units
should be at least 4 in. above the highest expected water and runolT
levels. Do not use unit if' it has been under water.
Step 4--Field Fabricate Ductwork
Secure all ducts to roof curb and building structure on vertical
discharge units. Do not cozmect dtlcmork to unit. For horizontal
applications, unit is provided with flanges on the horizontal
openings. All ductwork should be secured to the flanges. Insulate
and weatherproof all external ductwork, joints, and roof' openings
with counter flashing and mastic in accordance with applicable
codes.
Ducts passing through an unconditioned space nmst be insulated
and covered with a vapor barrier. If' a plenum return is used on a
vertical unit, the return should be ducted through the roof deck to
comply with applicable fire codes. A minimum clearance is not
required around ductwork. Cabinet return-air static shall not
exceed -.25 in. wg.
Step 5iRig and Place Unit
Rigging and handling of this equipment can be hazardous Ii_r many
reasons due to the installation location (rool&, elevated structures,
etc.)
Only trained, qualified crane operators and ground support staff
should handle and install this equipment.
When working with this equipment, observe precautions in the
literature, on tags, stickers, and labels attached to the equipment,
and any other salk_ty precautions that might apply.
Follow all applicable saMy codes. Wear safi_ty shoes and work
gloves.
Never stand benealh rigged nni/s or lili over people. ]
Never exceed 200 lbs. per brackel liliing {brce. [
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