Installation
17
│
Page
Size
the
gas
pipe
appropriately
to
supply
the
necessary
volume
of
gas
required
for
the
water
heater
using
ANSI233.1/NFPA
54
in
the
USA
or
CAN/CSA
B149.1
in
Canada
or
local
codes.
Otherwise,
flow
capabilities
and
output
temperatures
will
be
limited.
Check
that
the
type
of
gas
matches
the
rating
plate
first.
Ensure
that
any
and
all
gas
regulators
used
are
operating
properly
and
providing
gas
pressures
within
the
specified
range
shown
below.
Excess
gas
inlet
pressure
may
cause
serious
accidents.
Conversion
of
this
unit
from
natural
gas
to
propane
or
vise
versa
will
void
all
warranty.
Contact
your
local
distributor
to
get
the
correct
unit
for
your
gas
type.
The
manufacturer
is
not
liable
for
any
property
and/or
personal
damage
resulting
from
gas
conversions.
GAS
SUPPLY
AND
GAS
PIPE
SIZING
‐
General
‐
The
minimum
and
maximum
inlet
gas
pressures
are:
Gas
type
Inlet
gas
pressure
Natural
Gas
Min.
5.0”
WC
–
Max.
10.5”
WC
Propane
Min.
8.0”
WC
–
Max.
14.0”
WC
Gas
pressure
above
this
specified
range
for
the
water
heater
and/or
insufficient
gas
volume
will
adversely
affect
performance.
These
pressures
are
measured
when
the
water
heater
is
in
full
operation.
Inlet
gas
pressure
must
not
exceed
the
above
maximum
values;
gas
pressure
above
the
specified
range
will
cause
dangerous
operating
conditions
and
damage
to
the
unit.
Until
testing
of
the
main
gas
line
supply
pressure
is
completed,
ensure
the
gas
line
to
the
water
heater
is
disconnected
to
avoid
any
damage
to
the
water
heater.
‐
Gas
connections
‐
1.
Install
a
manual
gas
shut
‐
off
valve
between
the
water
heater
and
the
gas
supply
line.
2.
When
the
gas
connections
are
completed,
it
is
necessary
to
perform
a
gas
leak
test
(see
below)
either
by
applying
soapy
water
to
all
gas
fittings
and
observing
for
bubbles
or
by
using
a
gas
leak
detection
device.
The
water
heater
and
its
individual
shutoff
valve
must
be
disconnected
from
the
gas
supply
piping
system
during
any
pressure
testing
of
that
system
at
test
pressures
in
excess
of
1/2
psi
(3.5
kPa).
The
water
heater
must
be
isolated
from
the
gas
supply
piping
system
by
closing
its
individual
manual
shutoff
valve
during
any
pressure
testing
of
the
gas
supply
piping
system
at
test
pressures
equal
to
or
less
than
1/2
psi
(3.5kPa).
3.
Always
purge
the
gas
line
of
any
debris
and/or
water
before
connecting
to
the
gas
inlet.
WARNING
NOTICE
