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"B"
REQUIRED
SPREADER
BARS
UNIT
551J-04A
551J-05A
551J-06A
NOTES:
1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.
2. Dimensions in ( ) are in millimeters.
3. 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 to prevent rigging straps from damaging unit.
POSITIONING ON CURB
Position unit on roof curb so that the following clearanc-
es are maintained:
/
in. (6.4 mm) clearance between the
1
4
roof curb and the base rail inside the front and rear, 0.0 in.
clearance between the roof curb and the base rail inside on
the duct end of the unit. This will result in the distance be-
tween the roof curb and the base rail inside on the condenser
end of the unit being approximately
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment dam-
age.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck when panels or pack-
aging are removed.
After unit is in position, remove rigging skids and ship-
ping materials.
Step 7 — Convert to Horizontal and Connect
Ductwork (When Required)
Unit is shipped in the vertical duct configuration. Unit
without factory-installed economizer or return-air smoke
detector option may be field-converted to horizontal ducted
configuration. To convert to horizontal configuration, re-
move screws from side duct opening covers (see Fig. 7) and
remove covers. Use the screws to install the covers on verti-
cal duct openings with the insulation-side down. The panels
must be inserted into the notches on the basepan to properly
seal. The notches are covered by the tape used to secure the
insulation to the basepan and are not easily seen. See Fig. 8
for position of the notches in the basepan. Seals around duct
openings must be tight. Secure with screws as shown in
Fig. 9. Cover seams with foil duct tape.
Field-supplied flanges should be attached to horizontal
duct openings and all ductwork should be secured to the
flanges. Insulate and weatherproof all external ductwork,
36"- 54"
(914-1371)
"C"
"A"
SEE DETAIL "A"
MAX WEIGHT
lb
kg
in.
700
318
74.5
830
377
74.5
865
393
74.5
Fig. 6 — Rigging Details
1
/
in. (6.4 mm).
4
PLACE ALL SEAL STRIP IN PLACE
BEFORE PLACING UNIT ON ROOF CURB.
DUCT END
DIMENSIONS
A
mm
in.
1890
36.5
1890
36.5
1890
36.0
joints, and roof or building openings with counter flashing
and mastic in accordance with applicable codes.
Do not cover or obscure visibility to the unit's informa-
tive data plate when insulating horizontal ductwork.
REMOVABLE HORIZONTAL
RETURN DUCT OPENING COVER
Fig. 7 — Horizontal Conversion Panels
NOTCHES
Fig. 8 — Location of Notches
10
DETAIL "A"
B
C
mm
in.
925
33.5
925
41.5
915
41.5
REMOVABLE HORIZONTAL
SUPPLY DUCT OPENING COVER
BASEPAN
mm
850
1055
1055
NOTCHES
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