14
88-4TCA4001-1C-EN
AAttttaacchhiinngg HHoorriizzoonnttaall DDuuccttwwoorrkk ttoo UUnniitt
All conditioned air ductwork should be insulated to
minimize heating and cooling duct losses. Use a
minimum of two (2) inches of insulation with a vapor
barrier. The outside ductwork must be weatherproofed
between the unit and the building.
When attaching ductwork to a horizontal unit, provide a
flexible watertight connection to prevent noise
transmission from the unit to the ducts. The flexible
connection mmuusstt be indoors and made out of heavy
canvas.
NNoottee:: Do not draw the canvas taut between the solid
ducts.
Figure 6. Attaching Horizontal Airflow Ductwork
FIELD DUCT
UNIT EXTERIOR
WEATHERPROOF
THIS SEAM
FIELD DUCT
UNIT EXTERIOR
WEATHERPROOF
THIS SEAM
CCoonnddeennssaattee DDrraaiinn PPiippiinngg
Follow local codes and standard piping practices when
running the drain line. Pitch the line downward away
from the unit. Avoid long horizontal runs. See Figure
8, p. 14.
Figure 7. Condensate Drain
Attach standard 3/4” NPT
tting to drain pan
Construct condensate drain
pipe and route through inner wall,
across unit internally and out the
exterior wall as shown
Construct standard
“P Trap” Outside of unit
NNoottee:: Do not use reducing fittings in the drain lines.
The condensate drain must be:
• Made of 3/4” pipe size
• Pitched 1/4” per foot to provide free drainage to
convenient drain system
• Trapped
• Must be connected to a closed drain system unless
the trap is properly vented
Figure 8. Typical Condensate Drain Piping
3
/4" PVC OR COPPER
TUBING AND FITTINGS
1-1/2" MIN.
1-1/2" MIN.
AAiirr FFiilltteerr IInnssttaallllaattiioonn
Filter is field supplied in return duct and sized for 300
feet per minute face velocity.
IImmppoorrttaanntt:: Air filters and media wheels or plates shall
meet the test requirements in UL 900
EElleeccttrriiccaall WWiirriinngg
NNoottee:: This unit is factory wired for 230V. See wiring
diagram for 208V conversion.
EElleeccttrriiccaall CCoonnnneeccttiioonnss
Electrical wiring and grounding must be installed in
accordance with local codes or, in the absence of local
codes, with the National Electrical Code ANSI/NFPA 70,
Latest Revision.
EElleeccttrriiccaall PPoowweerr
It is important that proper electrical power be available
for the unit. Voltage variation should remain within the
limits stamped on the unit nameplate.
DDiissccoonnnneecctt SSwwiittcchh
Provide an approved weatherproof disconnect within
close proximity and wwiitthhiinn ssiigghhtt ooff tthhee uunniitt..If
disconnect must be mounted to the cabinet, the
location shown in should be the only one considered.
OOvveerr CCuurrrreenntt PPrrootteeccttiioonn
The branch circuit feeding the unit must be protected
as shown on the unit's rating plate.
SStteepp 44 —— UUnniitt IInnssttaallllaattiioonn
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