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LOCATION
48 in. (1219 mm)
18 in. (457 mm)
A
18 in. (457 mm)
12 in. (305 mm)
40 in. (1067 mm)
B
36 in. (914 mm)
36 in. (914 mm)
C
18 in. (457 mm)
42 in. (1067 mm)
D
36 in. (914 mm)
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning over-
head obstruction or for vertical clearances.
INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1.
Consult local building codes and the NEC (National
Electrical Code) (ANSI/NFPA 70) for special installa-
tion requirements.
2.
Determine unit location (from project plans) or select
unit location.
3.
Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb
or other) that provides for minimum clearances required for
safety (including clearance to combustible surfaces), unit
performance and service access below, around and above
unit as specified in unit drawings. See Fig. 3.
NOTE: Consider also the effect of adjacent units.
Unit may be installed directly on wood flooring or on
Class A, B, or C roof-covering material when roof curb is
used.
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contaminated
air.
C
B
DIMENSION
Unit disconnect is mounted on panel
No disconnect, convenience outlet option
Recommended service clearance
Minimum clearance
Surface behind servicer is grounded (e.g., metal, masonry wall)
Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass)
Side condensate drain is used
Minimum clearance
Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass)
Fig. 3 — Service Clearance Dimensional Drawing
D
A
CONDITION
Although unit is weatherproof, avoid locations that per-
mit water from higher level runoff and overhangs to fall
onto unit.
Select a unit mounting system that provides adequate
height to allow installation of condensate trap per require-
ments. Refer to Step 10 — Install External Condensate Trap
and Line on page 12 for required trap dimensions.
ROOF MOUNT
Check building codes for weight distribution require-
ments. Unit operating weight is shown in Table 2.
Table 2 — Operating Weights
551J
Base Unit
Economizer
Vertical
Horizontal
Perfect Humidity™
System
Cu Fins
Powered Outlet
Curb
14 in. (356 mm)
24 in. (610 mm)
6
UNIT LB (KG)
04
05
06
458 (208)
545 (247)
550 (249)
50 (23)
50 (23)
50 (23)
80 (36)
80 (36)
80 (36)
27 (10)
34 (13)
34 (13)
25 (11)
43 (20)
56 (25)
32 (15)
32 (15)
32 (15)
110 (50)
110 (50)
110 (50)
145 (66)
145 (66)
145 (66)
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