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MAX WEIGHT
UNIT
LB
548J07A
880
NOTES:
1. Dimensions in () are in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in detail "A." Holes in base rails are centered around the unit's 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 clearances are
maintained:
1
/
-in. (6.4 mm) clearance between the roof curb
4
and the base rail inside the front and rear, 0.0-in. clearance be-
tween the roof curb and the base rail inside on the duct end of
the unit. This will result in the distance between the roof curb
and the base rail inside on the condenser end of the unit being
approximately
/
-in. (6.4 mm).
1
4
Although unit is weatherproof, guard against water from higher
level runoff and overhangs.
After unit is in position, remove all shipping materials and top
skid. Recycle or dispose of all shipping 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
configuration. To convert to horizontal configuration, remove
screws from side duct opening covers (see Fig. 12) and remove
covers. Use the screws to install the covers on vertical 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. 13 for position of
the notches in the basepan. Seals around duct openings must be
tight. Secure with screws as shown in Fig. 14. 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. In-
sulate and weatherproof all external ductwork, joints, and roof
or building openings with counter flashing and mastic in accor-
dance with applicable codes.
Do not cover or obscure visibility to the unit's informative data
plate when insulating horizontal ductwork.
A
KG
IN.
399
74.38
Fig. 11 — Rigging Details
to
horizontal
ducted
DIMENSIONS
B
MM
IN.
1889
37.25
REMOVABLE HORIZONTAL
RETURN DUCT OPENING COVER
Fig. 12 — Horizontal Conversion Panels
NOTCHES
Fig. 13 — Location of Notches
14
C
MM
IN.
946
41.38
REMOVABLE HORIZONTAL
SUPPLY DUCT OPENING COVER
NOTCHES
BASEPAN
MM
1051
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Table of Contents
Troubleshooting
