A
RUVG
MANUAL
33 of 35
June 14
FILTERS
Filter
‐
changing
intervals
can
be
based
on
the
pressure
drop
across
the
filter
or
by
calendar
scheduling
or
visual
inspection.
Scheduled
intervals
should
be
between
one
and
six
months,
depending
on
the
pollutant
loading
from
indoor
and
outdoor
air.
More
‐
frequent
changes
may
be
required
during
the
economizer
season.
Units
that
operate
with
high
levels
of
outside
air
should
have
filters
removed
(or
moved
to
winter
filter
location
if
available)
during
the
winter
months
in
areas
that
have
heavy
frost
or
snow.
Plugged
or
excessively
dirty
filters
can
cause
damage
to
the
equipment.
See
submittal
record
for
filter
quantities,
sizes
and
types.
Use
same
size
and
type
for
replacement.
A.
High
Velocity
Permanent:
It
is
important
that
the
filters
be
checked
and
cleaned
regularly
during
the
period
immediately
following
installation,
in
order
to
determine
the
best
service
interval.
To
clean,
rinse
with
water.
Shake
off
excess
water
and
re
‐
install.
These
filters
do
not
require
an
oil
adhesive.
B.
Pleated
Throwaway
and/or
Replaceable
Media
(Cartridge,
Bag):
Replacement
filters
can
be
obtained
from
any
Engineered
Air
representative.
In
some
applications
the
used
filters/media
may
contain
chemical
or
biological
hazards.
All
local,
regional
and
national
regulations
for
safety
and
disposal
should
always
be
followed.
CONTROLS
Annually
clean
and
recalibrate
all
controls,
check
for
proper
operation,
and
repair
or
replace
any
faulty
controls.
Check
all
damper
hardware
settings
every
three
months.
Replace
blown
fuses
with
equivalent
size
and
type
fuse.
Failure
to
do
so
can
result
in
damage
to
the
unit.
CONTROL
ENCLOSURE
VENTILATION
Control
enclosures
are
often
ventilated
in
summer
to
provide
component
cooling.
A
manually
adjustable
slide
damper
is
provided
for
adjustment
and
seasonal
shut
off.
The
slide
damper
should
be
closed
for
winter
operation
and
opened
for
summer
operation.
OUTDOOR
AIR
INTAKES,
MIXING
SECTIONS
AND
DAMPERS
Outdoor
air
intakes,
screens,
and
adjacent
areas
shall
be
checked
semi
‐
annually
for
cleanliness,
integrity
and
proper
operation.
Adjust
dampers
where
required.
