Hook rigging shackles through holes in base rail, as shown in
Detail A. Holes in base rails are centered around the unit
center of gravity. Use wooden top skid, when rigging, to
prevent rigging straps from damaging unit.
UNIT I A [ B [ C [ D [ E [ MAX. WEIGHT
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DE;AlL A ._/_Lr_t. I _ g _ UNIT ON ROOF CURB
DET IL fA __--_ _ J__DUCT END
Fig. 3 - Rigging Label
C08433
Positioninu
Maintain clearance, per Fig. 2, 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. For proper
unit operation, adequate combustion and ventilation air must be
provided in accordance with Section 5.3 (Air for Combustion and
Ventilation) of the National Fuel Gas Code, ANSI Z223.1
(American National Standards Institute).
Although unit is weatherproof, guard against water from higher
level runoff and overhangs.
Locate mechanical draft system flue assembly at least 4 fl from any
opening through which combustion products could enter the
building, and at least 4 fl from any adjacent building (or per local
codes). Locate unit at least 10 fl away from any adjacent unit.
When unit is located adjacent to public walkways, flue assembly
must be at least 7 fl above grade.
Roof Mount
Check building codes for weight distribution requirements, Unit
operating weight is shown in Table 1.
Installation On Roof Curb
The 48PD units are designed to fit on the accessory full perimeter
curb. Correct placement of the unit onto the curb is critical to
proper operating performance. To aid in correct positioning, place
unit on roof curb to maintain 1/4-in. gap between the inside of rail
and roof curb on long sides and a 1/2-in. gap between the inside of
rail and roof curb on both duct and condenser ends. Refer to Fig. 1
and 2 to assure proper duct opening alignment.
NOTE: Before positioning unit onto curb, refer to Step 6 - Install
External Trap for Condensate Drain concerning bottom drain
connection plug.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage to unit.
Do not slide unit into position when it is sitting on the curb.
Curb gasketing material may be damaged and leaks may
result.
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.
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