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Thepackaged u nitisequipped w itha 3/4inchfptcoupling
forcondensate lineconnection. Plumbing m ustconform to
local codes.Use a sealingcompound on male pipe
threads.
Thedrainlinemustbeproperly trapped androutedtoa
suitable drain.Seefigure3 forproper d rainarrangement.
Thedrain line mustpitchto an opendrainor pumpa
minimum of 1 inchper10feetto prevent c logging of the
line.Seal a round drain connection withsuitable material to
prevent a irleakage intoreturnairsystem.
Drain piping should notbesmaller t handrainconnection at
coil.Anopen ventindrainlinewillsometimesberequired
dueto line length,frictionand staticpressure.Drains
should beconstructed ina manner tofacilitate f uture clean-
ing.
NOTE - The condensate drain fine MUST be trapped to
provide proper drainage.
Duct system should be designed and sized according to
the
methods
in Manual
Q of the Air
Conditioning
Contractors of America (ACCA).
A closed return duct system shall be used. This shall not
preclude use of economizers or outdoor fresh air intake. It
is recommended
that supply and return duct connections
at the unit be made with flexible joints.
The supply and return air duct systems should be designed
for the CFM and static requirements
of the job. They
should NOT be sized to match the dimensions of the
duct connections on the unit,
Ak CAUTION
Typical Condensate
Drain
Minimum Pitch
1 in. (25 ram) per
10' (3 m) of line
open
vent
unit
,%
Trap must be deep enough to offset maximum
mounting
static difference (Generally, 3 inches minimum),
frame
Figure
3
The vent hood is installed by placing screen in hood and
securing with four #8 x 3/8 large blunt sheet metal screws
and four #8 flat speed nuts as shown in figure 4. Place hood
with screen in position and attach with three #8 x 1/2 sheet
metal screws using holes provided.
Vent Hood Installation
o
HOOD
1
screen
No filters are supplied with the unit. Filters must always be
installed ahead of evaporator coil and must be kept clean or
replaced. Dirty filters will reduce the airflow of the unit.
Filters sizes are shown in table 1.
Unit is equipped with an internal filter clip which is located in
indoor coil compartment attached to side of the unit drain
pan.
Table
1
Unit Filter Size
Unit Model
Filter Size
-024, -030,
-036
24 in. X 25 in.
-042
28 in. X 25 in.
-048 -060
30 in. X 30 in.
Figure
4
The products of combustion are discharged horizontally
through a screened opening on the gas heat side panel.
The horizontal vent system shall terminate at least 4 feet
below, 4 feet horizontally from, or 1 foot above any door,
window,
or gravity air inlet into the building.
The vent
system shall terminate at least 3 feet above any forced air
inlet located within
10 feet. The bottom of the vent
terminal shall be located at least 12 inches above grade.
Minimum
horizontal
clearance
of 4 feet from electric
meters, gas meters, regulators, and relief equipment is
required.
Page 6
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