16
Value
Series
Manual
Installa on
of
Plumbing
A
manual
water
control
valve
must
be
placed
in
the
water
inlet
connec on
to
the
water
heater
before
it
is
connected
to
the
water
line.
Unions
may
be
used
on
both
the
hot
and
cold
water
lines
for
future
servicing
and
disconnec on
of
the
unit.
DO
NOT
•
Do
not
introduce
toxic
chemicals
such
as
those
used
for
boiler
water
treatment
to
the
potable
water
used
for
space
hea ng.
MUST
DO
•
The
piping
(including
soldering
materials)
and
components
connected
to
this
appliance
must
be
approved
for
use
in
potable
water
systems.
•
Purge
the
water
line
to
remove
all
debris
and
air.
Debris
will
damage
the
water
heater.
•
If
the
appliance
will
be
used
as
a
potable
water
source,
it
must
not
be
connected
to
a
system
that
was
previously
used
with
a
nonpotable
water
hea ng
appliance.
•
Ensure
that
the
water
fi
lter
on
the
water
heater
is
clean
and
installed.
Piping
Requirements
Pressure
Relief
Valve
Requirements
Install
the
pressure
relief
valve
according
to
local
plumbing
codes
and
these
instruc ons.
An
approved
pressure
relief
valve
is
required
by
the
American Na onal Standard (ANSI Z21.10.3)
for
all
water
hea ng
systems,
and
shall
be
accessible
for
servicing.
DO
NOT
•
Do
not
plug
the
relief
valve
and
do
not
install
any
reducing
fi
ngs
or
other
restric ons
in
the
relief
line.
The
relief
line
should
allow
for
complete
drainage
of
the
valve
and
the
line.
•
Do
not
place
any
other
type
valve
or
shut
o
ff
device
between
the
relief
valve
and
the
water
heater.
MUST
DO
•
The
relief
valve
must
comply
with
the
standard
for
Relief Valves and Automa c Gas Shuto
ff
Devices for
Hot Water Supply Systems ANSI Z21.22
and
/or
the
standard
Temperature, Pressure, Temperature and
Pressure Relief Valves and Vacuum Relief Valves,
CAN1
‐
4.4
.
•
The
relief
valve
must
be
rated
up
to
150
psi
and
to
at
least
the
maximum
BTU/hr
of
the
appliance.
•
The
discharge
from
the
pressure
relief
valve
should
be
piped
to
the
ground
or
into
a
drain
system
to
prevent
exposure
or
possible
burn
hazards
to
humans
or
other
plant
or
animal
life.
Follow
local
codes.
Water
discharged
from
the
relief
valve
could
cause
severe
burns
instantly,
scalds,
or
death.
•
The
pressure
relief
valve
must
be
manually
operated
once
a
year
to
check
for
correct
opera on.
•
The
relief
valve
should
be
added
to
the
hot
water
outlet
line
and
near
the
hot
water
outlet
according
to
the
manufacturer’s
instruc ons.
DO
NOT
place
any
other
type
valve
or
shut
o
ff
device
between
the
relief
valve
and
the
water
heater.
INFORMATION
•
If
a
relief
valve
discharges
periodically,
this
may
be
due
to
thermal
expansion
in
a
closed
water
supply
system.
Contact
the
water
supplier
or
local
plumbing
inspector
on
how
to
correct
this
situa on.
Do
not
plug
the
relief
valve.
•
The
American Na onal Standard (ANSI Z21.10.3)
does
not
require
a
combina on
temperature
and
pressure
relief
valve
for
this
appliance.
However,
local
codes
may
require
a
combina on
temperature
and
pressure
relief
valve.
Isola on
Valves
Rinnai
strongly
recommends
the
installa on
of
isola on
valves
on
the
cold
and
hot
water
lines
because
they
provide
the
ability
to
isolate
the
water
heater
from
the
structure’s
plumbing
and
allow
quick
access
to
fl
ush
the
heat
exchanger.
Flushing
the
heat
exchanger
regularly
is
required
as
part
of
the
proper
maintenance
for
this
water
heater.
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 ...
