30
Value
Series
Manual
How
to
use
the
Temperature
Controller
The
MC
‐
91
‐
2
controller
is
the
standard
temperature
controller
that
is
supplied
with
the
water
heater.
On
indoor
models
it
is
integrated
into
the
front
panel.
The
MCC
‐
91
‐
2
controller
is
for
hydronic
applica ons
requiring
higher
temperatures.
When
the
MCC
‐
91
‐
2
controller
is
connected,
these
higher
temperatures
are
available
on
all
controller
models
in
the
system.
Refer
to
the
sec on
on
temperature
ranges.
DO
NOT
repeatedly
operate
the
water
heater
and
then
use
a
hot
water
tap
while
the
controller
is
turned
o
ff
.
Opera ng
the
water
heater
in
this
way
to
alternately
produce
hot
water
may
cause
water
to
condense
on
the
outside
of
internal
parts
and
accumulate
in
the
water
heater
cabinet.
Dimensions
(inches):
3.5
W
x
4.75
H
x
0.75
D
Temperature
Display
Priority
Indicator
Priority
Button
ON/OFF
Button
In Use
Indicator
Temperature
Selection
MC-91-2US
•
Before
opera ng,
smell
all
around
the
appliance
area
for
gas.
Be
sure
to
smell
next
to
the
fl
oor
because
some
gas
is
heavier
than
air
and
will
se le
on
the
fl
oor.
•
Keep
the
area
around
the
appliance
clear
and
free
from
combus ble
materials,
gasoline,
and
other
fl
ammable
vapors
and
liquids.
•
Always
check
the
water
temperature
before
entering
a
shower
or
bath.
•
Do
not
use
this
appliance
if
any
part
has
been
under
water.
Immediately
call
a
licensed
professional
to
inspect
the
appliance
and
to
replace
any
part
of
the
control
system
and
any
gas
control
which
has
been
under
water.
•
Should
overhea ng
occur
or
the
gas
supply
fail
to
shut
o
ff
,
turn
o
ff
the
manual
gas
control
valve
to
the
appliance.
•
Do
not
adjust
the
DIP
switch
unless
speci
fi
cally
instructed
to
do
so.
•
Do
not
use
an
extension
cord
or
an
adapter
plug
with
this
appliance.
•
Any
altera on
to
the
appliance
or
its
controls
can
be
dangerous
and
will
void
the
warranty.
•
If
you
install
this
water
heater
in
an
area
that
is
known
to
have
hard
water
or
that
causes
scale
build
‐
up
the
water
must
be
treated
and/or
the
heat
exchanger
fl
ushed
regularly.
Rinnai
provides
a
“Scale
Control
System”
that
o
ff
ers
superior
lime
scale
preven on
and
corrosion
control
by
feeding
a
blend
of
control
compounds
into
the
water
supply.
Damage
and
repair
due
to
corrosive
compounds
in
the
air
is
not
covered
by
warranty.
•
Keep
the
air
intake
loca on
free
of
chemicals
such
as
chlorine
or
bleach
that
produce
fumes.
These
fumes
can
damage
components
and
reduce
the
life
of
your
appliance.
Damage
and
repair
due
to
scale
in
the
heat
exchanger
is
not
covered
by
warranty.
WARNING
Summary of Contents for . REU-VC2025FFU-US
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Page 77: ...Value Series Manual 77 ...
Page 78: ...78 Value Series Manual ...
Page 79: ...Value Series Manual 79 ...
