12
Fig. 9 — Rigging Details
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, remove
screws from side duct opening covers (see Fig. 10) 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. 11 for position of
the notches in the basepan. Seals around duct openings must be
tight. Secure with screws as shown in Fig. 12. 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.
Fig. 10 — Horizontal Conversion Panels
Fig. 11 — Location of Notches
DETAIL "A"
PLACE ALL SEAL STRIP IN PLACE
BEFORE PLACING UNIT ON ROOF CURB.
DUCT END
SEE DETAIL "A"
"A"
(914-1371)
36"- 54"
"C"
"B"
SPREADER
BARS
REQUIRED
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.
UNIT
MAX WEIGHT
DIMENSIONS
A
B
C
lb
kg
in.
mm
in.
mm
in.
mm
549J 04
725
330
74.5
1890
48.5
980
33.5
850
549J 05
845
384
74.5
1890
37.5
955
41.5
1055
549J 06
900
409
74.5
1890
37.5
955
41.5
1055
REMOVABLE HORIZONTAL
SUPPLY DUCT OPENING COVER
REMOVABLE HORIZONTAL
RETURN DUCT OPENING COVER
BASEPAN
NOTCHES
NOTCHES
Summary of Contents for Preferred 549J 04
Page 4: ...4 Fig 2 549J 04 06 Units Built On and After 4 15 2019...
Page 5: ...5 Fig 3 549J 04 06 Units Built Prior to 4 15 2019...
Page 6: ...6 Fig 4 549J 04 06 Corner Weights and Clearances...
Page 7: ...7 Fig 5 549J 04 06 Base Rail Details...
Page 8: ...8 Fig 6 549J 04 06 Thru the Base Charts...
Page 23: ...23 Fig 41 Electro Mechanical Control Wiring 208 230v 460v...
Page 24: ...24 Fig 42 Electro Mechanical Control Wiring 575v...
Page 25: ...25 Fig 43 Electro Mechanical Power Wiring 208 230 1 60...
Page 26: ...26 Fig 44 Electro Mechanical Power Wiring 208 230 3 60...
Page 27: ...27 Fig 45 Electro Mechanical Power Wiring 460 3 60...
Page 28: ...28 Fig 46 Electro Mechanical Power Wiring 575 3 60...
