Tools
R
e
q
uired
for
Service
It is intended for this manual to be used by qualified service personnel for the primary purpose of
troubleshooting and repair of the Bradford White U2TW Series water heaters. Understanding the
sequence of operation section of this manual will contribute greatly to troubleshooting the water
heater.
The Honeywell WV4462A Electronic Gas Control will display error codes in the event of abnormal
operation. Error codes are listed in the troubleshooting chart beginning on page 12 of this service
manual. The troubleshooting chart will also indicate the probable cause for the error code and
direct the service professional to a service procedure to properly diagnose the abnormal operation.
In some difficult to diagnose conditions, it may be necessary to isolate the heater from the vent
system to determine the problem.
Contact the Bradford White technical support group immediately if diagnosis cannot be made
using the methods described in this service manual.
P
a
g
e
5
M
anometer
:
A
li
q
uid
“
U
”
tube
type
or
a
di
g
ital
type
can
be
used.
This
device
is
used
to
measure
g
as
and
/
or
air
pressure
and
vacuum.
M
ulti-
M
eter
:
A
di
g
ital
type
is
stron
g
ly
recommended.
This
device
is
used
to
measure
electrical
values.
The
meter
you
select
must
have
the
capability
to
measure
volts
A
C,
volts
DC,
A
mps,
micro-amps
and
ohms.
E
lectronic
P
robes
:
In
some
cases,
standard
multi-meter
probes
will
dama
g
e
or
simply
not
be
effective
to
obtain
certain
volta
g
e
and
ohm
readin
g
.
It
will
be
necessary
to
have
special
electronic
“
pin
”
type
multi-meter
probes.
These probes
are
available
at
most
electronic
wholesale
outlets.
Thermometer
:
Used
to
measure
water
temperature.
A
n
accurate
thermometer
is
recommended.
Water
P
ressure
G
au
g
e
:
Used
to
measure
water
supply
pressure.
A
lso
used
to
determine
tank
pressure
by
adaptin
g
to
the
drain
valve
of
the
heater.
Various
Hand
Tools
:
P
ipe
wrench,
channel
locks,
open
end
wrenchs
(3
/8"
,
7/16"
,
½"
),
1
2
"
crescent
wrench,
A
llen
wrench
set,
screw
drivers
(common
&
P
hillips),
¼"
nut
driver,
pliers
(common
&
needle
nose),
socket
set,
side
cutters
wire
cutters,
wire
strippers,
wire
crimpers,
torpedo
level,
small
shop
vac,
step
ladder,
flashli
g
ht
and
5 g
allon
pail.
How to Use This Manual
5
