Lifting point should be directly over the center of gravity for
the unit.
Step 6—Connect Condensate Drain
NOTE: When installing condensate drain connection be sure to
comply with local codes and restrictions.
Models 50GS and 50GX dispose of condensate water through a
3/4 in. NPT fitting which exits through the base on the evaporator
coil access side. See Fig.2&3forlocation.
Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground-
level installations. Install a field-supplied condensate trap at end of
condensate connection to ensure proper drainage. Make sure that
the outlet of the trap is at least 1 in. lower than the drainpan
condensate connection to prevent the pan from overflowing (See
Fig. 7). When using a gravel apron, make sure it slopes away from
the unit.
Connect a drain tube using a minimum of 3/4 -in. PVC or 3/4 -in.
copper pipe (all field-supplied) at the outlet end of the 2-in. trap.
Do not undersize the tube. Pitch the drain tube downward at a
Fig. 4A— Roof Curb Dimensions
UNIT SIZE ODS CATALOG NUMBER
A
IN. (MM)
B
IN. (MM)
C
IN. (MM)
D
IN. (MM)
50GS018-042 50GX024-036
CPRFCURB006A00 8 (203) 11(279) 16-1/2 (419) 28-3/4 (730)
CPRFCURB007A00 14 (356) 11(279) 16-1/2 (419) 28-3/4 (730)
50GS048-060 50GX042-060
CPRFCURB008A00 8 (203) 16-3/16 (411) 17-3/8 (441) 40-1/4 (1022)
CPRFCURB009A00 14 (356) 16-3/16 (411) 17-3/8 (441) 40-1/4 (1022)
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Roof curb is made of 16-gage steel.
3. Table lists only the dimensions per part number that have changed
4. Insulated panels: 1-in. thick fiberglass 1 lb. density.
C00076
Gasket around
outer edge
Insulated
deck pan
Gasket around
duct
S/A
R/A
HVAC unit
base
*Gasketing
outer flange
Flashing field
supplied
Roofing material
field supplied
Cant strip
field supplied
*Provided with roofcurb
Roof
Duct work
field supplied
Insulation (field
supplied)
Roofcurb*
Wood nailer*
Gasketing
inner flange*
Screw
(NOTE A)
Roof Curb for Small Cabinet
Note A: When unit mounting screw is used,
retainer bracket must also be used.
HVAC unit
base
*Gasketing
outer flange
Flashing field
supplied
Roofing material
field supplied
Cant strip
field supplied
*Provided with roofcurb
Roof
Duct work
field supplied
Insulation (field
supplied)
Roofcurb*
Wood nailer*
Gasketing
inner flange*
Screw
(NOTE A)
Roof Curb for Large Cabinet
Note A: When unit mounting screw is used,
retainer bracket must also be used.
A
B Typ.
Supply opening
(B x C)
Long
Support
D
44
5
/16"
(1125.5mm)
Return opening
(B X C)
Insulated
deck pan
Short
Support
C Typ.
5
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