16
"B"
"C"
"A"
"914-1371"
(36"-54")
DETAIL A
SEE DETAIL A
PLACE ALL SEAL STRIP
IN PLACE BEFORE PLACING
UNIT ON ROOF CURB.
DUCT END
C09107
UNIT
MAX WEIGHT
DIMENSIONS
A
B
C
LB
KG
IN.
MM
IN.
MM
IN.
MM
548J*17 D
2070
940
127.8
3249
58.7
1491
52.3
1328
548J*24 D
2358
1071
141.5
3595
58.7
1491
52.3
1328
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 center of
gravity. Use wooden top to prevent rigging straps from damaging unit.
Fig. 11 -- Rigging Details
Positioning on Curb —
Position unit on roof curb so that the following clearances
are maintained:
1
/
4
in. (6 mm) clearance between the roof
curb and the base rail inside the right and left,
1
/
2
in.
(12 mm) clearance between the roof curb and the base rail
inside the front and back. This will result in the distance
between the roof curb and the base rail inside on the
condenser end of the unit being approximately equal to
Detail A in Fig. 7 and 8.
Do not attempt to slide unit on curb after unit is set. Doing
so will result in damage to the roof curb seal.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
After unit is in position, remove rigging skids and
shipping materials.
Step 7 — Horizontal Duct Connection
Refer to Fig. 2 and 3 for locations and sizes of the
horizontal duct connections. Note that there are two
different return air duct connection locations – one for
unit without an economizer (on back side of unit) and a
different one for unit equipped with an economizer (on
left end, under the economizer hood). The supply air duct
connection is on the back side. See Fig. 12 for top view
depicting typical horizontal duct arrangements.
Field--supplied
(3
/
4
--inch) flanges should be attached to
horizontal duct openings (see Fig. 12) 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.
Return Air Duct
with Economizer
Return Air Duct
without
Economizer
Horizontal
Supply Air
C10740
UNIT
Supply
Return without
Economizer
Return with
Economizer
Location
Back
Back
Left end
548J*17
Height --- In. (mm)
15
7
/
8
(402)
41
3
/
8
(1051)
18
3
/
8
(467)
Width --- in. (mm)
29
3
/
4
(756)
23
3
/
8
(593)
61
5
/
8
(1564)
548J*24
Height --- In. (mm)
15
7
/
8
(402)
49
3
/
8
(1253)
18
3
/
8
(467)
Width --- in. (mm)
29
3
/
4
(756)
23
3
/
8
(593)
61
5
/
8
(1564)
Fig. 12 -- Horizontal Duct Opening Dimensions
Step 8 — Install Outside Air Hood —
Factory Option
The outside air hood for factory--option economizer and
two--position damper is shipped in knock--down form and
requires field assembly. The panel for the hood top is
shipped on the end of the unit (see Fig. 13). The
remaining parts for the hood assembly (including side
panels, filters and tracks) are shipped in a carton that is
secured to the rear of the blower assembly. Access the
carton location through rear panel (see Fig. 14).
Summary of Contents for 548J*17 D Series
Page 4: ...4 a548J 015 Fig 2 Unit Dimensional Drawing Size 17 Units ...
Page 5: ...5 a548J 016 Fig 2 Unit Dimensional Drawing Size 17 Units cont ...
Page 6: ...6 a548J 017 Fig 2 Unit Dimensional Drawing Size 17 Units cont ...
Page 7: ...7 a548J 018 Fig 3 Unit Dimensional Drawing Size 24 Units ...
Page 8: ...8 a548J 019 Fig 3 Unit Dimensional Drawing Size 24 Units cont ...
Page 9: ...9 a548J 020 Fig 3 Unit Dimensional Drawing Size 24 Units cont ...
Page 13: ...13 C10139 Fig 7 Roof Curb Details Size 17 Units ...
Page 14: ...14 C10140 Fig 8 Roof Curb Details Size 24 Units ...
Page 19: ...19 a50 9696 Fig 20 548J 17 24 Control Wiring Diagram with VFD Option ...
Page 20: ...20 a50 9697 Fig 21 Typical 548J 17 24 Power Wiring Diagram 208 230V 3 Phase 60Hz unit shown ...
Page 44: ...44 a50 9699 Fig 44 RTU Open System Control Wiring Diagram ...
