Bryant 907 User manual
Installation
Instructions
ELECTRONIC
AIR
CLEANER
907
Sizes
12,
16,
24
Series
B
brqant
INTRODUCTION
The
Bryant
Model
907
Series
A
Electronic
Air
Cleaner
is
available
in
three
sizes:
12-907
(1200
Cancels:
39907D6
I
39907D7
8/15/72
CFM),
16-907
(1600
CFM),
and
24-907
(2400
CFM).
They
are
designed
for
use
with
residential
and
light
commercial
forced-air
heating
and/or
cooling
systems
and
can
be
installed
in
a
vertical
or
horizontal
sec¬
tion
of
a
typical
return
air
duct
system.
The
electronic
components
of
the
unit
convert
the
120
VAC
of
the
power
supply
to
7200
VDC
which
imparts
an
electrical
charge
to
airborne
particles
such
as
smoke,
bacteria,
pollen,
and
dust.
These
charged
par¬
ticles
are
then
attracted
by
the
dust-collecting
media,
thus
purifying
the
airstream.
The
electronic
air
cleaner
consists
of:
1.
A
cabinet
containing
the
air
cleaning
assembly.
2.
A
power
door
assembly.
See
Figure
2.
CABINET.
A
casing
encloses
three
sections
that
make
up
the
air
cleaning
assembly.
These
sections
are:
1.
Mechanical
prefilter.
An
expanded
metal
first-
stage
filter
that
removes
lint
and
larger
dust
particles.
2.
Ionizer
section.
Consists
of
tungsten
wires
(that
receive
a
positive
charge)
mounted
between
grounded
steel
channels
and
supported
by
polyester,
glass-
reinforced
insulators.
3.
Collector
section.
Consists
of
two
grounded
wire
grills
and
one
center
plate
(that
receives
a
positive
charge)
with
two
fiber
glass
dirt
collecting
“media”
pads,
one
on
either
side
of
the
center
plate.
See
Figure
11.
POWER
DOOR
ASSEMBLY.
See
Figure
10.
The
door
assembly
consists
of:
1.
A
power
indicator
light,
ON-OFF
switch,
and
lock
knob
installed
on
the
door
cover.
2.
A
door
base
plate
contains
an
encapsulated
power
pack,
a
surge
resistor,
and
wiring
that
are
mounted
internally.
A
line
voltage
disconnect
(male
plug)
and
high-voltage
spring
bus-bar
is
mounted
on
the
base
plate
externally.
Six
screws
must
be
removed
to
ex¬
pose
the
power
pack
and
wiring.
Power
Pack.
The
supply
circuit
to
the
power
pack,
which
is
wired
across
the
system
air
blower,
is
con¬
trolled
by
an
ON-OFF
power
switch.
With
the
power
switch
ON
(assuming
power
door
locked
and
air
GROUNDED
PLATE
REPLACEABLE
COLLECTING
PAD
POSITIVELY
CHARGED
GRID
REPLACEABLE
COLLECTING
GROUNDED
PLATE
IONIZER
PREFILTER
DUST-LADEN
RETURN
AIR
INDICATOR
LIGHT
CASED
POWER
PACK
A68175
Figure
2—Air
Cleaner
Components
—
ELECTRICAL;'!
•ENTRANCE
'
&
fe
H
fill
I
ISIIf
f
/
:
,T-
„
4
4
h~
ON-OFF/f
SWITCH
^
REMOVABLE
POWER
DOOR
N
INDICATOR
LIGHT
A70003
Figure
3—Dimensional
Drawing
TABLE
(—DIMENSIONS
Model
A
C
D
E
12-907
31-1/4
20-3/16
17-11/16
24’
16-907
31-1/4
25-11/16
23-3/16'
24
*
24-907
33-1/4
31-3/16
28-11/16
26
TABLE
II—PHYSICAL
DATA
Model
12-907
16-907
24-907
Air
Volume
Range
CFM
600-1200
800-1600
1400-2400
•
Filter
Area
Face
area
sq
ft
3.37
4.36
.
5.76
.
Nominal
size
in.
18x25
24
x
26
30
x
28
Electrical
Data
Input
(to
power
door)
120
volts
AC,
single
phase,
60
Hertz
Output
to
unit
7200
volts
DC,
1„7
Milliamp.s
Approx
Shipping
Weight
lbs
48
54
*
61
TABLE
III—PRESSURE
DROP
AT
VARIOUS
AIRFLOWS
12-907
16-907
24-907
CFM
Pressure
Drop
Inches
wc
CFM
Pressure
Drop
Inches
wc
CFM
'
Pressure
Drop
Inches
wc
600
0.05
800
0.05
1400
0.09
*
700
0.07
1000
0.08
1600
/
:
'
0.12
•
800
0.085
1200
0.11
1800
0.45
‘
900
0.107
1400
0.15
.
2000
.
.
0.1.8
1000
0.13
1600
0.19
2200
.
.
0.22:
1100
0.16
2400
,,..026
s
\
1200
0.19
,
_
.
1
Note:
Using
the
electronic
air
cleaner
on
air
duct
systems
designed
for
airflows
lower
than
600
CFM
for
Model
12-907,
800
CFM
for
16-907,
and
1400
CFM
for
24-907
is
not
recommended.
12
/
1
6
/
24/907
-
2
-
blower
operating),
120-VAC
zb
10%
single
phase,
60-Hz
current
is
applied
to
the
power
pack
trans¬
former.
The
output
of
the
transformer
secondary
is
approximately
3600
VAC
and
alternately
charges
two
capacitors
through
two
silicon
rectifiers.
The
total
charge
across
both
capacitors
results
in
a
power
pack
output
of
approximately
7200
VDC;
therefore,
the
cir¬
cuit
is
classed
as
a
voltage
doubler
circuit.
NOTE:
Power
packs
are
completely
encapsulated
and
not
field
repairable.
The
surge
resistor
is
ex¬
ternal
to
the
power
pack
and
can
be
readily
replaced
in
the
field.
Installation
of
the
Model
907
consists
of
the
following
steps
(sections):
I.
L
o
c
a
t
ing
the
Unit
II.
C
o
n
necting
the
Air
Ducts
III.
Making
Electrical
Connections
IV.
Start-up
and
Adjustment
In
addition,
the
following
sections
are
also
included:
V
Maintenance
VI.
Recommended
Service
Procedures
IMPORTANT—Read
1.
Check
local
codes
and
ordinances
for
additional
requirements
pertaining
to
installation
of
unit.
2.
Check
electrical
pow;er
supply
to
building
to
be
sure
rated
voltage,
frequency,
and
phase
correspond
to
that
on
unit
rating
plate.
Before
Installing
3.
Because
Model
907
cleans
only
air
brought
to
it
by
system
blower,
run
blower
continuously,
or
as
much
as
possible—summer
and
winter.
4.
Do
not
block
air
outlets
and
returns
with
draperies
or
furniture.
A68176
Figure
4—Typical
Upflow
Furnace
Installation
Figure
5—Typical
Basement
Furnace
Installation
TRANSITION
TO
ACCOMMODATE
Figure
7—Typical
Horizontal
Furnace
Installation
Figure
6—Typical
Downflow
Furnace
Installation
-3-
12/16/24/907
I.
LOCATING
THE
UNIT
Figures
4,
5,
6,
and
7
show
the
air
cleaner
in
the
return
air
duct
of
some
typical
furnace
installations
with
and
without
air
conditioning.
Other
methods
of
installing
the
unit
are
permissible
if
the
design
procedure
outlined
in
the
Product
Data
Sheet
is
observed.
When
planning
an
installation,
consider
the
following:
1.
The
air
cleaner
is
approved
only
for
indoor
installa¬
tion.
If
an
outdoor
installation
is
used,
the
unit
must
be
housed
in
a
weatherproof
enclosure.
2.
The
air
cleaner
may
be
placed
on
its
right
or
left
side
in
a
vertical
or
horizontal
position.
It
must
be
in¬
stalled
on
the
inlet
air
side
of
the
heating
and/or
cooling
unit.
Be
sure
that
the
airflow
through
the
air
cleaner
is
in
the
same
direction
as
the
airflow
arrow
indicates.
standing
flanges
on
the
air
cleaner
casing.
This
per¬
mits
a
greater
range
of
application.
If
flanges
are
needed,
“L”-shaped
standing
seam
duct
cleats
can
be
used
for
connecting
the
ductwork,
or
to
position
the
furnace
on
top
of
the
air
cleaner.
All
downstream
connections
must
be
properly
sealed
to
prevent
in¬
filtration
of
unfiltered
air.
Airflow
across
the
air
cleaner
must
be
uniform
for
best
results.
Turning
vanes
should
be
installed
if
the
air
cleaner
is
installed
close
to
an
elbow.
Depending
Figure
8
Power
Door
Packing
A70013
3.
Allow
a
minimum
of
30
inches
clearance
in
front
of
the
unit
for
cleaning
and
maintenance.
4.
The
air
cleaner
should
never
be
used
to
collect
grease
or
other
flammable
contaminants.
5.
If
a
humidifier
is
used,
moisture
should
be
intro¬
duced
downstream
from
the
air
cleaner.
II.
CONNECTING
THE
AIR
DUCTS
Dispose
of
existing
mechanical
furnace
filters.
They
are
not
required.
Move
ON-OFF
switch
to
OFF
and
unlock
the
power
door
by
rotating
the
knob
(approxi¬
mately
10
turns
counter-clockwise)
until
the
door
is
free.
Grasp
the
power
door
by
the
knob
and
the
door
handle
and
remove
it
from
the
cleaner
casing
by
pulling
it
towards
you.
This
motion
disengages
the
120-V
power
supply
connector.
Remove
and
discard
the
cardboard
packing
taped
to
the
inside
surface
of
the
door.
See
Figure
8.
Slide
out
all
three
sections.
See
Figure
9.
Note
there
are
no
LINE
VOLTAGE
DISCONNECT
COLLECTOR
PREFILTER
IONIZER
POWER
DOOR
A70008
Figure
9—Power
Door
Removed
from
Air
Cleaner
12/16/24/907
-
4
-
on
the
size
of
the
furnace,
it
may
or
may
not
be
necessary
to
reduce
the
ductwork
on
the
leaving
air
side
of
the
air
cleaner.
Whatever
the
application,
a
3
to
1
duct
reduction
ratio
should
be
maintained
(3
inches
of
duct
length
for
every
1
inch
reduction
in
size).
NOTE:
Do
not
baffle
off
any
portion
of
the
entering
air
side
of
the
cleaner.
When
changes
in
duct
size
would
be
too
abrupt,
an
alternate
horizontal
position
may
be
used,
as
illustrated
in
Figure
5.
For
best
results,
use
multiple
return
air
grills
located
at
or
near
floor
level.
Higher
cleaning
efficiencies
and
lower
blower
operating
costs
are
obtained
by
limiting
the
filter
face
velocity
to
350
ft/min.
III.
MAKING
ELECTRICAL
CONNECTIONS
1.
With
power
door
removed,
remove
junction
box
cover
located
above
female
plug
on
casing
center
channel.
2.
Air
cleaner
casing
has
a
top
line-voltage
entrance
hole.
Use
hole
(install
strain
relief)
to
run
two-wire
with
ground
electric
cable
into
position
for
making
connections
at
female
plug.
3.
Connect
power
leads
to
black
and
white
pigtails
extending
from
female
plug,
using
wire
nuts
provided.
4.
Connect
ground
to
green
pigtail
extending
from
female
plug
box,
using
wire
nut
provided.
Replace
junction
box
cover.
5.
Slide
prefilter,
ionizer,
and
collector
sections
into
casing.
6.
Replace
power
door
by
first
inserting
bottom
tab
into
place
on
bottom
edge
of
door
opening.
Push
top
of
door
and
guide
lock
knob
screw
(Figure
10)
into
threads.
Turn
knob
clockwise
until
screw
engages
threads
in
casing.
Continue
turning
knob
clockwise
until
door
is
securely
locked.
7.
Use
proper
wiring
diagram
for
single-or
multiple-
speed
blowers.
If
cleaner
is
wired
to
a
multi-speed
direct
drive
motor,
it
must
be
isolated
by
a
relay.
3.
Check
to
see
if
amber
indicator
light
is
glowing.
This
indicates
proper
unit
operation.
4.
Adjust
airflow
to
no
more
than
350
ft/min.
This
can
be
done
with
velometer
or
as
described
in
filter
flag
instruction
(optional).
V.
MAINTENANCE
Because
normal
maintenance
(cleaning)
is
so
simple,
most
homeowners
will
choose
to
personally
perform
the
necessary
operations.
Clean
the
unit
where
dust
from
the
media
pads
will
not
soil
carpets
or
the
floor.
To
gain
access
to
the
prefilter,
ionizer
and
collector
filter
stages,
simply
push
power
switch
to
OFF
position
and
remove
the
power
door
as
outlined
previously.
Lay
it
off
to
one
side.
Pull
out
the
first-
stage
prefilter
and
vacuum
from
entering
air
side,
or
wash
in
detergent
and
water.
Let
dry
thoroughly.
Re¬
install.
Do
not
spray
prefilter
with
any
filter
coatings.
Collector
pads
should
be
replaced
every
3
months
or
whenever
indicated
by
the
optional
filter
flag
or
monitor
panel.
This
time
interval,
of
course,
will
vary
with
service
conditions.
IV.
START-UP
AND
ADJUSTMENT
A70120
1.
Move
switch
on
power
door
to
ON.
Figure
10
Power
Door
Internal
Detail
2.
Set
thermostat
to
start
blower.
ON-OFF
ENCAPSULATED
POWER
PACK
LOCK
KNOB
SCREW
COVER
INDIC
soCKET
G
H
T
TO
PRIMARY
WINDING
INDICATOR
LIGHT
WIRES
-
5
-
12
/
1
6
/
24/907
WIRE
GRILL
To
replace
the
media
pads:
1.
Slide
collector
section
(Figure
11)
from
unit
and
place
it,
yellow-side
down,
on
a
piece
of
paper
(should
be
more
than
twice
as
large
as
collector)
laid
out
on
a
flat
surface.
2.
Deflect
spring
clips
downward,
lift
wire
grill
and
pivot
it
upward
enough
to
remove
dirty
media
pad.
Place
soiled
pad
to
one
side.
3.
Place
clean
pad
on
perforated
center
plate
of
collector
frame.
Pad
should
completely
cover
center
plate
and
insulators.
4.
Pivot
wire
grill
downward
and
deflect
spring
clips
until
grill
is
engaged.
5.
Turn
collector
section
over
and
repeat
steps
2,
3,
and
4
to
change
other
media
pad.
NOTE:
For
best
results,
do
not
clean
and
reuse
dirty
media
pads.
They
can,
however,
be
reused
tem¬
porarily
by
vacuuming
or
shaking
out
accumulated
dust.
Pads
can
be
vacuumed
through
the
wire
grill.
Use
brush
attachment
of
cleaner.
6.
Slide
collector
section
on
its
track
completely
into
casing.
7.
Roll
up
dirty
pads
and
paper
and
dispose
of
them.
The
ionizer
assembly
should
be
cleaned
at
the
start
of
each
heating
and
cooling
season
by
using
the
long
brush
attachment
of
a
vacuum
cleaner;
manually
by
using
a
soft,
long
bristled
brush;
by
wiping
the
plates
with
a
damp
cloth;
or
by
a
combination
of
these
three
methods.
Care
must
be
taken
not
to
break
the
ionizer
wires
or
bend
the
ionizer
plates.
as
damage
may
result
After
cleaning
and
reassembly
of
components,
rein¬
stall
the
power
door.
Make
sure
that
door
is
securely
locked.
Move
power
switch
to
ON.
Unit
is
now
ready
for
operation.
VI.
RECOMMENDED
SERVICE
PROCEDURES
Tools
required
for
servicing:
Jumper
cord,
1-wire
12/16/24/907
A70119
Figure
11—Collector
Section
Components
Jumper
cord,
3-wire
Voltmeter
(capable
of
measuring
up
to
10,000
VDC)
Screwdriver,
slotted
head
Pliers,
long
nose
1.
MALFUNCTIONS
THAT
PREVENT
INDICATOR
LIGHT
OPERATION
A
glowing
indicator
light
indicates
that
the
power
pack
is
energized
and
that
the
proper
DC
voltage
is
being
supplied
to
the
air
cleaner.
If
the
light
is
off,
make
the
following
checks:
A.
CHECK
PRIMARY
VOLTAGE.
If
the
primary
voltage
does
not
read
between
108
and
132
VAC
at
the
outlet
receptacle
(female
plug)
on
the
casing
cen-
terpost,
check
the
120-VAC
power
source.
If
the
voltage
reading
at
the
centerpost
receptacle
is
within
the
120-VAC
±
10%
range,
check
further
to
isolate
the
problem
to:
1.
Power
door
2.
Indicator
light
-
6
-
B.
CHECK
CABINET
ASSEMBLY
1.
Make
sure
all
components
are
correctly
assembled
as
shown
in
Figure
2.
2.
Turn
ON-OFF
switch
to
OFF.
3.
Remove
power
door.
4.
I
n
s
tall
3-wire
jumper
cord
from
male
(line
voltage
disconnect)
plug
on
power
door
to
female
plug
on
casing
centerpost.
See
Figure
12.
5.
M
o
ve
ON-OFF
switch
to
ON.
a.
If
indicator
light
does
not
glow,
proceed
to
check
high-voltage
output,
indicator
light,
and
encapsulated
power
pack.
b.
If
indicator
light
glows,
check
out
ionizer
and
collector
sections
for
possible
short.
Move
switch
OFF;
clip
jumper
between
bus-bar
(on
base
plate)
and
“T”
handle
on
section
testing.
Push
switch
ON.
If
indicator
light
glows
when
section
is
energized
separately,
section
is
good.
If
light
does
not
glow,
sec¬
tion
is
shorting
out.
If
either
section
is
defective,
refer
to
Step
6a
and
6b
that
follow
for
corrective
action
procedures.
If
both
collector
and
ionizer
pass
their
checkouts,
look
for
trouble
in
the
power
door.
Be
sure
to
push
switch
OFF
and
remove
jumper
cord
before
proceeding
to
check
filter
sections
and
power
door.
6a.
Check
out
ionizer
section
for:
(1)
E
x
c
essive
dirt
on
ionizer
wires
or
ionizer
chan¬
nels.
Clean
with
vacuum
cleaner
brush.
If
necessary,
use
cloth
dampened
in
detergent
and
water
solution.
(Dry
thoroughly
before
reassembly).
(2)
Bowed
or
dented
ionizer
channels.
Make
sure
channels
are
approximately
parallel.
Wires
should
be
spaced
at
least
3/8
inch
from
channels.
Straighten
channels
if
necessary.
(3)
Broken
or
loose
ionizer
wires.
Replace
wires
using
long-nosed
pliers,
as
shown
in
Figure
14.
Place
terminal
on
one
end
of
wire
in
notch
in
ionizer
bus¬
bar.
Grasp
terminal
on
other
end
of
wire
with
pliers
and
pull
wire
firmly.
Depress
ionizer
bus-bar
with
screwdriver
until
you
can
fit
wire
into
notch
on
bus¬
bar;
position
terminal
on
bus-bar,
then
remove
screwdriver
pressure
on
bus-bar.
A70011
Figure
12—Checking
Indicator
Light
(4)
Broken,
cracked,
or
loose
insulator
or
in¬
sulators.
Replace
complete
ionizer
section.
(5)
Broken
spotwelds
between
ionizer
channels
and
center
ground
strap.
Refasten
strap
to
channel
with
pop
rivet
or
sheet
metal
screw.
6b.
Check
out
collector
section
for:
(1)
Dirty
media
pads.
Clean
or
replace.
Reassem¬
ble
collector
section.
Indicator
light
should
now
glow
if
dirty
pads
were
problem
source.
(2)
Bent
grills
or
perforated
center
plate.
Straighten.
(3)
Broken,
cracked,
or
loose
insulator
or
in¬
sulators.
Replace
collector
section.
-
7
-
12
/
1
6
/
24/907
C.
C
H
E
C
K
HIGH-VOLTAGE
OUTPUT.
If
the
ON-
OFF
light
still
will
not
glow
and
it
has
been
deter¬
mined
that
the
trouble
is
not
in
the
cabinet
assembly,
proceed
to
check
the
high-voltage
output
as
follows:
1.
Remove
base
plate
from
power
door.
2.
Disconnect
surge
resistor
from
terminal
on
base
plate.
See
Figure
10.
3.
Install
3-wire
jumper
cord
from
male
(line
voltage
disconnect)
plug
on
casing
centerpost.
See
Figure
12.
4.
Push
ON-OFF
switch
ON.
If
light
glows,
trouble
is
isolated
to
high-voltage
terminal,
surge
resistor,
broken
or
damaged
bus-bar
insulators.
D.
C
HECK
INDICATOR
LIGHT.
If
the
indicator
light
still
does
not
glow
when
the
high-voltage
wire
is
disconnected
from
the
bus-bar
on
the
base
plate,
check
the
voltage
supplied
to
the
light
as
follows:
1.
D
i
sconnect
light
leads
at
light.
TOUCH
SCREWDRIVER
TO
CASING
A70010
Figure
13—Checking
High-Voltage
DC
Supply
2.
Energize
encapsulated
power
pack
and
measure
voltage
across
light
leads.
Reading
must
be
90
to
130
VDC.
3.
If
voltage
is
within
tolerance,
indicator
light
is
defective.
Replace.
E.
CHECK
ENCAPSULATED
POWER
PACK.
See
Figure
10.
If
the
voltage
supplied
by
the
power
pack
to
the
indicator
light
is
less
than
60-90
VDC
when
the
high-voltage
wire
is
disconnected
from
the
bus-bar
and
the
power
pack
is
energized:
1.
Power
pack
has
defective
circuit.
2.
Check
terminal'
on
surge
resistor
for
high-voltage
output
of
power
pack.
Voltage
must
read
7500-9000
VDC
with
surge
resistor
disconnected
from
bus-bar.
With
air
cleaner
components
energized,
operating
voltage
is
approximately
7200
VDC.
If
meter
is
not
available
for
a
voltage
measurement,
ground
blade
of
an
insulated
handle
screwdriver
against
grounded
base
plate
and
move
blade
tip
towards
surge
resistor
terminal.
See
Figure
13.
A
spark
should
occur
at
a
gap
of
1/8
to
3/16
inch
between
terminal
and
screwdriver
tip,
indicating
potential
of
approximately
8000
VDC.
3.
Encapsulated
power
pack
is
defective.
Replace.
F.
CHECK
SURGE
RESISTOR.
De-energize
the
power
pack
and
check
the
surge
resistor
in
place
on
the
power
pack.
See
Figure
10.
The
measurement
should
be
15,000
ohms,
30
watts.
Replace
if
shorted
or
open.
A
shorted
resistor
does
not
properly
protect
the
power
pack.
An
open
resistor
means
that
the
high-voltage
cord
and
air
cleaner
components
are
not
receiving
high-voltage
power.
G.
CHECK
FOR
HIGH-HUMIDITY
SHORTING.
During
periods
of
high
(over
80
percent)
relative
humidity,
there
exists
a
possibility
that
the
two
nor¬
mally
nonconductive
media
pads
can
absorb
enough
moisture
to
support
conduction
between
the
high
positive
potential
center
plate
of
the
collector
section
and
the
two
grounded
grills.
The
result
is
excessive
current
draw
and
the
collapse
of
transformer
voltage.
The
indicator
light
goes
out.
Continuing
operation
of
the
blower
in
the
system
should
dry
out
the
pads
to
stop
center
plate-to-grill
conduction.
The
high
voltage
will
be
restored
and
the
indicator
light
will
glow
again.
Humidifiers,
when
used,
should
be
installed
down¬
stream
from
the
air
cleaner
to
avoid
the
possibility
of
high-humidity
shorting.
2.
HUMMING
NOISE
Check
for
the
following:
A.
Improper
wiring
connections.
B.
Loose
ionizer
wires.
Repair
or
replace.
C.
Excessively
dirty
ionizer
or
collector
section
(in¬
cluding
media
pads).
Clean.
12
/
1
6
/
24/907
-
8
-
3.
C
O
N
S
T
ANT
OR
INTERMITTENT
ARCING
Check
for:
A.
Loose
or
defective
ionizer
wire
or
wires.
Repair
or
replace.
B.
Excessively
dirty
ionizer
or
collector
section
(in¬
cluding
media
pads).
Clean.
C.
Foreign
matter
such
as
string
lodged
in
or
close
to
ionizer
section
and
flapping
in
airstream.
Remove.
D.
Bent
ionizer
channels.
Straighten
if
possible;
if
unable
to
straighten,
replace
ionizer
section.
E.
Broken
insulators
in
either
ionizer
or
collector
section.
Replace
ionizer
or
collector
section.
F.
Dents
in
one
or
both
collector
section
wire
grills.
Straighten
if
possible;
if
not,
replace
grill.
G.
Improperly
positioned
media
pad.
Reposition.
H.
Supply
voltage
exceeding
132
VAC.
Change
power
pack
supply
lead
to
low
tap.
I.
Vibration
from
external
source.
Eliminate
vibration
source
or
isolate
air
cleaner.
Figure
14—Replacing
Ionizer
Wire
4.
A
I
R
NOT
BEING
CLEANED
Be
sure
indicator
light
is
glowing,
showing
proper
electrical
operation.
Check
for:
A.
No
power
to
ionizer
and
collector
sections.
Check
for
proper
contact
between
bus-bar
on
power
door
and
“T”
handles
on
ionizer
and
collector
sections.
B.
Airflow
through
unit
set
too
high.
Use
velometer
to
adjust
to
no
more
than
350
ft/min.
C.
Leaks
in
ductwork,
blower
box,
and
other
parts
of
system
under
negative
pressure
on
clean
air
side
of
air
cleaner.
Seal
leaks
with
duct
tape
or
caulking.
D.
Dirty
air
not
being
delivered
to
the
cleaner
as
result
of
blocked
return
air
grills.
Remove
drapes,
furniture,
or
any
other
obstruction.
E.
Uneven
air
distribution
across
face
of
unit.
Install
turning
vanes
or
air
baffles
to
even
air
distribution.
An
even
collection
of
dirt
across
entering
side
of
a
media
pad
indicates
good
distribution.
5.
R
ADIO
OR
TV
INTERFERENCE
Check
for:
A.
Improper
grounding.
Ascertain
that
power
pack
has
good
electrical
ground.
B.
Supply
line
voltage
ground
line
not
properly
grounded.
Correct.
C.
Loose
ionizer
wires.
Replace.
D.
Foreign
particles
lodged
in
ionizer
section.
Remove.
E.
Loose
connections
on
components
or
primary
wiring
within
power
door.
Tighten
connections.
F.
Defective
power
pack.
Replace.
G.
Dents
in
one
or
more
grills
or
center
plate.
Straighten
or
replace.
H.
Damaged
media
pad.
Replace.
I.
Improperly
installed
pad.
Reposition.
6.
W
HITE
DUST
“White
dust”
may
be
noticed
on
furnishings,
especially
when
the
cleaner
first
begins
to
function.
It
is
especially
noticeable
on
dark
furniture.
“White
dust”
is
largely
composed
of
lint,
which
because
of
its
weight
settles
before
it
reaches
the
air
returns.
The
amount
of
lint
generated
is
increased
by
new
fur¬
nishings
or
draperies
and
the
activity
of
children
and
pets.
Large,
clean
lint
particles
have
no
staining
or
soiling
properties.
SEQUENCE
OF
OPERATION
When
system
blower
is
in
operation,
power
pack
(IB)
is
energized
with
120-V±
10%
single
phase,
60
Hz
AC
current.
-
9
-
12
/
16
/
24/907
The
enclosed
power
pack
transformer
secondary
out¬
put
of
approximately
3600
VAC
alternately
charges
two
capacitors
through
two
silicon
rectifiers.
The
total
charge
across
both
capacitors
results
in
a
power
pack
output
of
approximately
7000-7500
VDC.
Current
from
the
enclosed
power
pack
flows
through
the
surge
resistor
(11A)
and
energizes
the
ionizer
sec¬
tion
(4F1)
and
collector
section
(4F2).
LEGEND
IB
-
Power
Pack
4F1
-
Ionizer
4F2
-
Collector
11
A-
Surge
Resistor
11D
-
Earth
or
Water
Ground
HE
-
Chassis
Ground
11F
-
Indicator
Light
LOW-VOLTAGE
TERMINAL
STRIP
(BRYANT)
;
M
ODEL
850
COMFORT
PROGRAMMER
NON-BRYANT
:
*
COMMON
SIDE
OF
TRANSFORMER
**
TERMINAL
FOR
HEATING
SIDE
OF
THERMOSTAT
***
TERMINAL
FOR
COOLING
SIDE
OF
THERMOSTAT
Figure
17—Wiring
Diagram
of
Model
850
Comfort
Programmer
Used
to
Control
Model
907
19/-|R/9d/<M17
-
1
0
-
POWER
SUPPLY
FIELD
LOW-VOLTAGE
WIRING-
FIELD
HIGH-VOLTAGE
WIRING
—
—
—
MANUAL
DISCONNECT
(FIELD
INSTALLED)
HOT
4-
l
LOW-VOLTAGE
TO
FURNACE
TERMINALS
(ON
SOME
UNITS,
X
&
F
MAY
BE
COMMON).
RELAY
P/N
63653D
CURRENT
DRAW
0.1
AMP
HIGH
LOW
ELECTRONIC
AIR
CLEANER
NOTE:
THE
SPST
RELAY
AMPERAGE
DRAW
MUST
BE
ADDED
TO
THE
THERMOSTAT
ANTICIPATOR
SETTING
NOTE:
FOR
COMBINATION
HEATING/COOLING
INSTALLATIONS
HAVING
MULTI-SPEED
DIRECT
DRIVE
MOTORS,
USE
THE
MODEL
850
COMFORT
PROGRAMMER.
A70107
Figure
16—Wiring
Diagram
for
Model
907
Connected
to
Heating
Only
Furnace
(No
Humidifier)
HUMIDIFIER
AIR
CLEANER
-**
to"g"
WIRE
FROM
THERMOSTAT
Figure
18—Wiring
Diagram
for
Comfort
System
Control
Center
120-V
System
for
Heating
and
Cooling—Two
Transformers.
A69320
-
1
1
-
12
/
16
/
24/907
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