Trane RT-PRC010-EN Manual page 11

Horizontal Discharge
The typical rooftop installation has both
the supply and return air paths routed
through the roof curb and building roof.
However, many rooftop installations
require horizontal supply and/or return
from the rooftop because of a building's
unique design or for acoustic
considerations.
Trane has two ways to accomplish
horizontal supply and/or return. The first
applies to all IntelliPak® Rooftop units.
Special field supplied curbs are installed
that use the unit's standard discharge
and return openings. The supply and
return air is routed through the curb to
horizontal openings on the sides of the
curb. The second method available for
horizontal supply and return applies to
Figure AC-2 Horizontal Discharge Panel Dimensions — 20 - 75 Tons SXHF, SFHF , SLHF , SSHF Units
Table AC-1 — SXHF , SFHF , SSHF , SLHF —
Panel A and B Dimensions
Model H (in.) W (in.)
S*HF C20 40.7 25.5
S*HF C25 40.7 25.5
S*HF C30 52.7 25.5
S*HF C40 64.5 34.5
S*HF C50 76.7 34.5
S*HF C55 76.7 34.5
S*HF C60 64.6 34.5
S*HF C70 64.6 34.5
S*HF C75 64.6 34.5
Notes:
1. Add an extra 0.20-inches pressure drop to the supply external static to account for the extra turn the air is making.
2. The openings all have a 1.25-inch lip around the perimeter to facilitate ductwork attachment.
3. If exhaust fans are being used, provisions should be made for access to the exhaust components, since the access door is now being used as a return.
4. Use the dimensions provided and the supply Cfm to calculate the velocity (ft/min) through the openings to be sure they are acceptable.
RT-PRC010-EN
Application
Considerations
20 - 75 tons SXHF , SFHF, SLHF , SSHF , and
90 - 130 tons SXHG, SLHG and SSHG
design units ONLY. With this method the
standard discharge and return openings
are blocked in the field. Access panels
are removed as indicated in Figures AC-1
and AC-2. These openings are used for
the discharge and return. No special
curb is needed.
SXHF , SFHF , SLHF , SSHF Units
Figure AC-1 is a simplified sketch of the
rooftop showing which panels can be
used for horizontal supply and/or return.
To supply air horizontally, the panels that
normally house the heat accessory
controls (Panel A) and the gas heat
barometric dampers (Panel B) can be
removed and either of the openings
Table AC-2 — SXHF , SFHF , SSHF , SLHF —
Total Area (H X W)
(in. ) (ft ) Model
2 2
1038 7.2 S*HF C20
1038 7.2 S*HF C25
1344 9.3 S*HF C30
2225 15.5 S*HF C40
2646 18.4 S*HF C50
2646 18.4 S*HF C55
2229 15.5 S*HF C60
2229 15.5 S*HF C70
2229 15.5 S*HF C75
* = X, F , L, or S
Note: Cannot remove Panel A
for horizontal discharge on
SFHF, SLHF, SSHF Units.
Panel C Dimensions
Total Area (H X W)
H (in.) W (in.) (in. ) (ft )
2 2
40.7 34.5 1404 9.8
40.7 34.5 1404 9.8
52.7 34.5 1818 12.6
64.5 34.5 2225 15.5
76.7 34.5 2646 18.4
76.7 34.5 2646 18.4
64.6 34.5 2229 15.5
64.6 34.5 2229 15.5
64.6 34.5 2229 15.5
used as a unit discharge (see note 1). To
return air horizontally, the exhaust fan
access door (Panel C) can be removed
and used as a return opening. Tables AC-
1, 2 and 3 show dimensions for those
panels.
Horizontal Discharge on SXHF , SFHF,
SLHF and SSHF Rooftops (20 to 75 tons)
The SXHF (extended casing cooling
only), SFHF (gas heat), SSHF (steam
heat) and SLHF (hot water heat) rooftops
can be field modified to supply and
return air horizontally without the use of
a horizontal supply/return curb.
To supply air horizontally on SXHF only,
the panels that normally house the heat
accessory controls (Panel A) and the gas
heat barometric dampers (Panel B) can
be removed and either of the openings
used as a unit discharge. To return air
horizontally, the exhaust fan access door
(Panel C) can be removed and used as a
return opening.
1. For horizontal discharge on SFHF, SLHF and SSHF
units, only the Panel B can be removed. Panel A
cannot be used due to the location of the heating
coils.
2. For horizontal discharge on SFHF (gas heat) models,
the block off under the heater must be removed.
After removal, a support must be added for the drain
tube.
3. Supply and Return Base openings must be covered
when converting to a horizontal configuration.
Table AC-3 — SXHF , SFHF , SSHF , SLHF —
X, Y and Z Dimensions
Model X (in.) Y (in.)
S*HF C20 35.5 44.0
S*HF C25 35.5 44.0
S*HF C30 35.5 56.0
S*HF C40 44.5 67.8
S*HF C50 44.5 80.0
S*HF C55 44.5 80.0
S*HF C60 44.5 68.0
S*HF C70 44.5 68.0
S*HF C75 44.5 68.0
Z (in.)
201.5
201.5
201.5
237.0
237.0
237.0
237.5
237.5
237 .5
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