6
Filters
Filters are not provided with unit and must be supplied and
externally installed in the return duct system by the installer. An
optional factory-approved internal filter rack may also be used. A
field-installed filter grille is recommended for easy and
convenient access to the filters for periodic inspection and
cleaning. When installing filters, ensure the airflow arrows on the
filter are pointing toward the circulator blower.
Refer to the following unit filter size chart for filter size
information.
NOTE: Filters must have adequate face area for the rated
quantity of the unit. See the Air Delivery Table for the
recommended filter size. Size the filters in accordance with their
manufacturer recommendations. Throwaway filters must be sized
for a maximum face velocity of 300 ft per minute.
Air Delivery Table
Connect Condensate Drain
The condensate drain connection of the evaporator is a half
coupling of
³⁄₄
" N.P.T. A trap must be provided to have proper
condensate drainage.
Condensate Drain Connection
■
Install the condensate drain trap as shown. Use a
³⁄₄
" (1.9 cm)
NPT drain connection size or larger.
■
Do not operate without a trap.
■
Unit must be level or slightly inclined toward drain.
WIRING
NOTE: All wiring should be made in accordance with the National
Electrical Code (N.E.C).
Consult your local power company to determine the availability of
sufficient power to operate the unit. Check the voltage, frequency
and phase at the power supply to ensure it corresponds to the
unit’s rated voltage requirement.
In accordance with the N.E.C. or local codes, install a branch
circuit fused disconnect near the unit. Determine wire sizes and
overcurrent protection from the unit nameplate ampacity and in
accordance with Branch Circuit Ampacity chart or the N.E.C. The
wiring should never be sized smaller than is recommended by
either of these 2 sources.
Fuses smaller than that recommended on the rating plate could
result in unnecessary fuse failure or service calls. The use of
protective devices of larger size than indicated could result in
extensive damage to the equipment. The manufacturer bears no
responsibility for damage caused to equipment as result of the
use of larger than is recommended size protective devices.
All units have undergone a run test prior to packaging for
shipment. This equipment has been started at minimum rated
voltage and checked for satisfactory operation.
IMPORTANT: Do not attempt to operate this unit if the voltage is
not within the minimum and maximum voltages shown on
nameplate.
All exterior wiring must be within approved weatherproof conduit.
The unit must be permanently grounded in accordance with local
codes, or in absence of local codes, with N.E.C. ANSI/ NFPA
Number 70-1984 or latest edition by using ground lug in the
control box.
Minimum Filter Size
Nominal Size—in. (cm)
Nominal Area—sq ft (cm
2
)
10 x 20 (25.4 x 50.8)
1.4 (1,301)
14 x 20 (35.6 x 50.8)
1.9 (1,765)
14 x 25 (35.6 x 63.5)
2.4 (2,230)
15 x 20 (38.1 x 50.8)
2.1 (1,951)
16 x 20 (40.6 x 50.8)
2.2 (2,044)
16 x 25 (40.6 x 63.5)
2.8 (2,601)
20 x 20 (50.8 x 50.8)
2.8 (2,601)
20 x 25 (50.8 x 63.5)
3.5 (3,252)
25 x 25 (63.5 x 63.5)
4.3 (3,995)
To prevent property damage due to fire and loss of
equipment efficiency or equipment damage due to dust
and lint build up on internal parts, never operate unit
without an air filter installed in the return air system.
CAUTION
500 1,000 1,500 2,000 2,500
3,000 3,500
7
(6,503)
Disposable Filter
Permanent Filter
Nominal Filter Area
sq ft (cm
2
)
6
(5,574)
5
(4,645)
4
(3,716)
3
(2,787)
2
(1,858)
Airflow - SCFM
A. Drain connection
B. 2" (5.1 cm) minimum
C. 3" (7.6 cm) minimum
D. Positive liquid seal (required)
E. Flexible tubing, hose or pipe
F. Unit
A
F
B
E
C
D
