18
Value
Series
Manual
Connect
Water
Heater
to
Water
Supply
Water
connec ons
to
the
tankless
water
heater
should
follow
all
state
and
local
plumbing
codes.
If
this
is
a
standard
installa on,
refer
to
the
Piping
Diagram
for
Basic
Installa on.
1.
Plumb
water
supply
to
the
tankless
water
heater
on
the
3/4”
MNPT
connec on
at
the
bo om
of
the
unit
marked
“Water
Inlet”,
which
is
the
cold
water
supply.
2.
Plumb
the
building
hot
water
supply
to
the
3/4”
MSPT
connec on
marked
“Water
Outlet”,
which
is
the
hot
water
supply.
If
a
pipe
cover
will
be
installed,
make
sure
water
lines
to
the
water
heater
fi
t.
Checklist
for
Plumbing
□
Purge
the
water
line
of
all
debris
and
air
by
closing
the
hot
isola on
valve
and
opening
the
cold
isola on
valve
and
its
drain.
Debris
will
damage
the
water
heater.
Use
a
bucket
or
hose
if
necessary.
□
Ensure
that
hot
and
cold
water
lines
are
not
crossed
to
the
unit
and
are
leak
free.
□
Ensure
that
a
pressure
relief
valve
is
installed
with
a
ra ng
that
exceeds
the
BTU
input
of
the
water
heater
model.
Refer
to
the
ra ng
plate
on
the
side
of
the
water
heater
for
BTU
input.
□
Clean
the
inlet
water
fi
lter
by
closing
the
cold
and
hot
water
inlet
isola on
(shut
‐
o
ff
)
valves.
Put
a
bucket
under
the
fi
lter
at
the
bo om
of
the
water
heater
to
catch
any
water
that
is
contained
inside
the
unit.
Unscrew
the
water
fi
lter.
Rinse
the
fi
lter
to
remove
any
debris.
Install
the
fi
lter
and
open
the
isola on
valves.
□
Check
for
proper
water
pressure
to
the
water
heater.
Minimum
water
pressure
is
50
psi.
Rinnai
recommends
60
‐
80
psi
for
maximum
performance.
Installa on
of
Gas
Supply
MUST
DO
•
A
manual
gas
control
valve
must
be
placed
in
the
gas
supply
line
to
the
water
heater.
A
union
can
be
used
on
the
connec on
above
the
shut
o
ff
valve
for
the
future
servicing
or
disconnec on
of
the
unit.
•
Check
the
type
of
gas
and
the
gas
inlet
pressure
before
connec ng
the
water
heater.
If
the
water
heater
is
not
of
the
gas
type
that
the
building
is
supplied
with,
DO
NOT
connect
the
water
heater.
Contact
the
dealer
for
the
proper
unit
to
match
the
gas
type.
•
Check
the
gas
supply
pressure
immediately
upstream
at
a
loca on
provided
by
the
gas
company.
Supplied
gas
pressure
must
be
within
the
limits
shown
in
the
Speci
fi
ca ons
sec on
with
all
gas
appliances
opera ng.
•
Before
placing
the
appliance
in
opera on
all
joints
including
the
heater
must
be
checked
for
gas
ghtness
by
means
of
leak
detector
solu on,
soap
and
water,
or
an
equivalent
non
fl
ammable
solu on,
as
applicable.
(Since
some
leak
test
solu ons,
including
soap
and
water,
may
cause
corrosion
or
stress
cracking,
the
piping
shall
be
rinsed
with
water
a er
tes ng,
unless
it
has
been
determined
that
the
leak
test
solu on
is
non
‐
corrosive.)
•
Use
approved
connectors
to
connect
the
unit
to
the
gas
line.
Purge
the
gas
line
of
any
debris
before
connec on
to
the
water
heater.
General
Instruc ons
WARNING
1.
If
you
are
not
knowledgeable
or
quali
fi
ed
to
install
gas
lines
or
connec ons,
then
contact
a
licensed
professional
to
install
the
gas
supply.
2.
Turn
o
ff
120v
power
supply.
3.
Turn
o
ff
the
gas.
4.
Gas
is
fl
ammable.
Do
not
smoke
or
provide
other
igni on
sources
while
working
with
gas.
5.
Do
not
turn
on
the
water
heater
or
gas
un l
all
fumes
are
gone.
Summary of Contents for . REU-VC2025FFU-US
Page 27: ...Value Series Manual 27 Ladder Diagram ...
Page 77: ...Value Series Manual 77 ...
Page 78: ...78 Value Series Manual ...
Page 79: ...Value Series Manual 79 ...
