21
Ductless
Fume
Hoods
Chapter 5–Service and Maintenance
5.1
Scheduled
Maintenance
Proper
and
timely
maintenance
is
crucial
for
trouble
free
functioning
of
any
device
and
your
Esco
ductless
fume
hood
is
no
exception
to
this
rule.
We
strongly
recommend
that
you
follow
the
maintenance
schedule
suggested
hereunder
in
order
to
obtain
optimal
performance
from
your
Esco
ductless
fume
hood.
No.
Description
of
Task
to
Perform
Maintenance
to
be
carried
out
every
Week
Month
Quarter
1
Year
2
Years
1
Check
the
alarm
and
measure
the
basic
airflow
√
2
Clean
the
interior
work
surface
and
walls
with
soap
water
√
3
Wipe
down
sash
with
appropriate
glass
cleaner
√
4
Clean
the
exterior
surfaces
of
the
ductless
fume
hood
√
5
Measure
the
ductless
fume
hood
face
velocity
√
6
Check
fans,
motors,
drives
and
bearings
for
proper
operation
√
7
Check
fluorescent
tubes
for
proper
operation
√
8
Test
the
operation
of
airflow
alarm
√
9
Repair
defect
and
lubricate
as
necessary
√
10
Clean
the
stainless
steel
surface
using
MEK
√
11
Re
‐
certification
√
12
Change
the
fluorescent
lamps
√
13
Check
filter
saturation
(check
according
to
Filtracheck
recommendation)
Cleaning
the
Hood
•
Clean
the
work
surface
and
walls
with
soap
water
•
Clean
the
sash
window
using
an
appropriate
glass
cleaner
•
Use
a
damp
cloth
to
clean
the
exterior
surface
of
the
fume
hood,
particularly
on
the
front
and
top
in
order
to
remove
dust
that
accumulated
there
•
Use
clean
water
to
finish
the
cleaning
and
wash
away
any
residue
from
the
soap
water
and
glass
cleaner
•
For
removing
stubborn
stains
or
spots
on
the
stainless
steel
surface,
make
use
of
MEK
(Methyl
‐
Ethyl
‐
Ketone).
In
such
cases,
make
sure
that
you
wash
the
steel
surface
immediately
afterwards
with
clean
water
and
some
liquid
detergent.
Use
a
polyurethane
cloth
or
sponge
for
washing.
Regularly
cleaning
the
stainless
steel
surface
can
help
you
retain
the
attractive
factory
finish.
Test
the
audible
and
visual
alarm
If
possible,
cover
the
airflow
sensor;
otherwise
cover
the
perforations
on
the
back
wall
–
this
should
disrupt
the
airflow
of
the
hood
enough
to
activate
the
alarm
Check
the
hoods
functionality
•
Check
the
hood’s
mechanical
functionality;
ex:
sash
window
–
lubricate
if
necessary
•
Check
the
hood’s
electrical
functionality;
ex:
fluorescent
lamp
–
replace
if
necessary
•
Check
the
hood
for
any
defect,
repair
immediately
Check
filter
saturation
Check
for
filter
saturation
often.
The
saturation
level
of
a
filter
is
directly
affected
by
the
amount
of
chemical
fume
generated
by
the
experiment
conducted
inside
the
fume
hood.
Use
particle
counter
below
and
above
the
main
(and
backup)
filter
and
compare
the
results
to
check
the
saturation
level
of
the
carbon
filter.
Re
‐
certification
All
ductless
fume
hoods
must
be
re
‐
certified
annually
by
a
certified
engineer.
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