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"B"
REQUIRED
SPREADER
BARS
UNIT
lb
RHW036
772
RHW048
964
RHW060
986
NOTES:
1. SPREADER BARS ARE 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.
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 configu-
ration. To convert to horizontal configuration, remove
screws from side duct opening covers (see Fig. 6) and re-
move 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 proper-
ly seal. The notches are covered by the tape used to secure
the insulation to the basepan and are not easily seen. See
Fig. 7 for position of the notches in the basepan. Seals
around duct openings must be tight. Secure with screws as
shown in Fig. 8. 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, 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 informative
data plate when insulating horizontal ductwork.
REMOVABLE HORIZONTAL
RETURN DUCT OPENING COVER
REMOVABLE HORIZONTAL
SUPPLY DUCT OPENING COVER
Fig. 6 — Horizontal Conversion Panels
10
36"- 54"
(914-1371)
"C"
"A"
SEE DETAIL "A"
MAX WEIGHT
kg
in.
350
74.5
437
74.5
447
74.5
Fig. 5 — Rigging Details
Specifications subject to change without notice.
PLACE ALL SEAL STRIP IN PLACE
BEFORE PLACING UNIT ON ROOF CURB.
DUCT END
DIMENSIONS
A
B
mm
in.
1890
36.0
1890
35.4
1890
35.4
Fig. 7 — Location of Notches
Fig. 8 — Horizontal Duct Panels In Place
DETAIL "A"
C
mm
in.
915
33.5
900
41.5
900
41.5
NOTCHES
BASEPAN
SCREWS
DUCT COVERS
SHEET METAL
FACE UP
BASEPAN
mm
850
1055
1055
NOTCHES
10
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