7.
Inside
head,
locate
and
disconnect
large
white
3
‐
pin
power
connector
and
4
‐
pin
small
RTD
connector
for
APR
‐
HHA
heater
head
8.
Locate
and
remove
3x
spring
‐
loaded
APR
‐
HHA
head
mounting
screws
from
bottom
holes
as
shown
(3/32”
allen
key);
as
last
screw
removed
hold
the
HHA
and
carefully
allow
it
to
drop
to
‘rest’
position;
it
will
be
held
in
place
by
the
2x
airflow
tubes
in
rear
9.
While
holding
the
HHA
head,
remove
both
blue
‐
banded
and
white
‐
banded
airflow
tubes
from
rear
of
head
and
slowly
drop
HHA
head
below
vacuum
tube
end
to
remove
completely
IMPORTANT!
WHLE
REMOVING
HEAD
BE
CAREFUL
NOT
TO
BEND
VACUUM
TUBE!
4
‐
pin
RTD
conn
3
‐
pin
POWER
conn
3x
access
holes
for
HHA
mount
screws
3x
access
HHA
mounting
screws
3/32”
long
straight
driver
type
hex
allen
key
preferred
AIRFLOW
TUBING
Blue
‐
banded
TOP
White
‐
banded
BOTTOM