Friedrich OES Series, Руководство по установке и эксплуатации

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920-138-02 (3-04) 920-138-02 (3-04)
! CAUTION:
If return air ducting is not used, an adequately
sized metal return air grille is required. Velocity should not
exceed 500 FPM for return air grilles, and 400 FPM for filter
grilles. It is recommended that the proper Friedrich return air
grille kit be installed in applications where no return duct is
used.
FILTERS
Two replaceable air filters are supplied from the factory. The
filters are accessible through the access panels on the sides of
the unit (See Figure 2) or from the inside of the building through
the return air grille.
The combined pressure losses of the return and supply air
paths must not exceed the external static capabilities of the
system at the design airflow (See Table 1).
The factory-installed filter rails are designed to hold 1" or 2"
filters. When using 2" filters the filter rail divider tabs must be
folded flat (See Figure 3).
NOTE: Dirty filters are the most common cause of inadequate
heating and cooling performance.
• Inspect filters monthly
• Replace disposable type filters before they become
clogged
• Use water and mild detergent to clean washable type
filters
NOTE: Most filters are marked with an arrow to indicate the
proper direction of air flow through the filter. The arrow MUST
point in the direction of air flow.
OUTDOOR AIR SYSTEM
As a completely self-contained system, OES/OHS series units
require an adequate supply of outdoor air to exchange heat
from the outdoor air coil. The outdoor air intake and discharge
openings are located on the front and sides of the unit.
! CAUTION:
To ensure proper operation, the outdoor air
intake and discharge air paths must be free and unobstructed
for the first 20 inches. The two air paths must be unrestricted
to ensure that the intake and discharge air do not recirculate
(also called short-circuit).
CONDENSATE DRAINAGE
A plastic drain hose extends from the drain pan to the vent at
the bottom of the unit. This line can be attached to a suitable
drainage system. If this is done, the system must be vented
or open type to ensure proper drainage. Condensate water
can freeze in cold weather which could create hazardous
situations.
Figure 3 - Filter Rail Adjustment