SA
VE
T
HI
S
M
ANUAL
F
O
R F
UTU
RE REFERE
NC
E REV 12/14 238-51306-00
A
I
ntro
du
ct
i
on
T
he
Bradford
White
U
l
tra
Low
N
O
x
Atmospheric
Vent
Water
Heater
is
designed
to
de
l
iver
a
remarkab
l
e
amount
of
hot
water
at
82
%
therma
l
efficiency
in
a
quiet
running
unit
with
a
top
e
x
haust
vent
connection
that
a
ll
ows
for
insta
ll
ation
in
e
x
isting
l
ocations
.
Whi
l
e
this
unit
is
vented
atmospherica
ll
y
there
is
no
damper
required
to
maintain
heat
l
oss
during
off
cyc
l
e
.
Severa
l
techno
l
ogica
ll
y
advanced
design
features
are
incorporated
that
wi
ll
require
additiona
l
know
l
edge
on
the
part
of
the
qua
l
ified
service
provider
. T
he
information
in
this
manua
l
wi
ll
instruct
service
and
maintenance
professiona
l
s
on
the
function
,
proper
diagnosis
and
repair
of
T
he
Bradford
White
U
l
tra
Low
N
O
x
Atmospheric
Vent
Water
Heater
.
T
he
Bradford
White
U
l
tra
Low
N
O
x
Atmospheric
Vent
Water
Heater
uses
an
u
l
tra
l
ow
N
O
x
premi
x
power
burner
l
ocated
at
the
top
of
the
water
heater
to
direct
a
turbu
l
ent
f
l
ame
down
into
the
water
backed
combustion
chamber
. T
his
turbu
l
ence
causes
a
thorough
mi
x
ing
of
gas
and
air
for
optimum
combustion
. T
he
combustion
gases
then
trave
l
through
a
two
pass
f
l
ue
system
keeping
the
gases
moving
at
a
high
ve
l
ocity
. T
he
combination
of
high
turbu
l
ence
and
ve
l
ocity
resu
l
ts
in
an
optimum
transfer
of
heat
from
the
f
l
ue
gases
into
the
water
.
Burner
operation
is
contro
ll
ed
using
an
e
l
ectronic
ignition
modu
l
e
. T
he
modu
l
e
monitors
the
status
of
the
e
l
ectronic
thermostat
,
b
l
ocked
vent
l
imit
switch
,
f
l
ame
sensor
to
contro
l
output
vo
l
tage
to
b
l
ower
motor
,
spark
rod
and
gas
va
l
ve
. T
he
modu
l
e
contains
programming
which
determines
the
sequence
of
operation
and
timings
for
purge
periods
,
tria
l
for
ignition
,
f
l
ame
sensing
and
l
ockout
. T
he
modu
l
e
wi
ll
a
l
so
provide
diagnostic
information
to
he
l
p
in
determining
the
cause
of
system
l
ockouts
.
T
he
contents
in
this
manua
l
are
detai
l
ed
informationa
l
too
l
s
to
assist
in
the
proper
diagnosis
of
the
U
l
tra
Low
N
O
x
Atmospheric
Vent
Water
Heater
operationa
l
fau
l
ts
.
P
l
ease
read
this
service
manua
l
comp
l
ete
l
y
and
record
as
much
information
regarding
the
U
l
tra
Low
N
O
x
Atmospheric
Vent
Water
Heater
operation
and
insta
ll
ation
specifics
re
l
ated
to
any
concerns
.
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