11
Fig. 8 —
Rigging Details
POSITIONING ON CURB
For full perimeter curbs CRRFCURB072A00 and 073A00, the
clearance between the roof curb and the front and rear base rails
should be
1
/
4
in. (6.4 mm). The clearance between the curb and the
end base rails should be
1
/
2
in. (13 mm). For retrofit applications
with curbs CRRFCURB003A01 and 4A01, the unit should be po
-
sition as shown in Fig. 9. Maintain the 15
1
/
2
in. (394 mm) and
8
5
/
8
in. (220 mm) clearances and allow the 22
5
/
16
in. (567 mm)
dimension to float if necessary.
Fig. 9 —
Retrofit Installation Dimensions
If the alternative condensate drain location through the bottom of
the unit is used in conjunction with a retrofit curb, the hole in the
curb must be moved 12
1
/
2
in. (320 mm) towards the end of the
unit.
Although unit is weatherproof, guard against water from higher
level runoff and overhangs.
Remove all shipping materials and top skid. Remove extra center
post from the condenser end of the unit so that the condenser end
of the unit matches Fig. 21-23. 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 fac
-
tory-installed economizer or return-air smoke detector option may
be field-converted to horizontal ducted configuration using acces
-
sory CRDUCTCV001A00. To convert to horizontal configura
-
tion, remove screws from side duct opening covers (see Fig. 10)
and remove covers. Discard the supply duct cover. Install accesso
-
ry CRDUCTCV001A00 to cover the vertical supply duct opening.
Use the return duct cover removed from the unit end panel to cov
-
er the vertical return duct opening. 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 open
-
ings 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 open
-
ings and all ductwork should be secured to the flanges. Insulate
and weatherproof all external ductwork, joints, and roof or build
-
ing 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.
Fig. 10 —
Horizontal Conversion Panels
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
50HCQD12
2075
943
116.0
2945
58.5
1485
59.5
1510
DETAIL “A”
SEE DETAIL “A”
(914 - 1371)
36” - 54”
“B”
“A”
“C”
PLACE ALL GASKET IN PLACE BEFORE PLACING
UNIT ON ROOF CURB.
DUCT END
REMOVABLE HORIZONTAL
SUPPLY DUCT OPENING COVER
REMOVABLE HORIZONTAL
RETURN DUCT OPENING COVER
Summary of Contents for 50HCQ12
Page 4: ...4 Fig 2 Unit Dimensional Drawing Size 12 Units ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing Size 12 Units cont ...
Page 9: ...9 Fig 6 Roof Curb Details REV 50TM500827 ...
Page 25: ...25 Fig 42 Typical 50HCQ Control Wiring Diagram ...
Page 26: ...26 Fig 43 Typical 50HCQ Power Wiring Diagram 208 230 3 60 unit shown ...
Page 27: ...27 Fig 44 PremierLink Controller Wiring Schematic ...
Page 28: ...28 Fig 45 RTU Open Controller System Wiring Diagram ...
