A
RUVG
MANUAL
34 of 35
June 14
COILS
Inspect
coils
and
drain
pans
for
cleanliness
and
biological
growth
once
per
year
during
the
cooling
season
or
more
often
as
required.
Warning:
Dirty
coils
can
be
a
cause
of
poor
air
quality.
Failure
to
maintain
clean
coils
can
cause
injury
or
death,
damage
to
the
equipment,
property
damage
or
system
operational
problems.
Moisture
carry
over
can
result
from
dirty
coils.
The
external
surface
of
finned
coils
can
be
cleaned
using
a
low
pressure
water
spray
and
a
brush.
Coil
fins
are
easily
damaged.
Do
not
use
high
pressure
steam
or
water
to
clean
coils;
it
will
permanently
damage
the
coil.
When
using
cleaning
additives
or
solutions
they
must
be
compatible
with
the
coil
materials
or
coatings.
Use
a
fin
comb
to
straighten
any
damaged
or
bent
fins.
Coil
Winterization:
Water
coils
that
are
not
in
use
must
be
protected
from
freezing.
Coils
should
be
drained
and
blown
out
with
compressed
air
and
then
filled
and
drained
several
times
with
appropriate
strength
pre
‐
mixed
inhibited
HVAC
glycol
or
other
suitable
fluid.
Do
not
use
propylene
glycol
with
CPVC
piping.
