VC
Series
Manual
17
Isola
Ɵ
on
Valves
and
Pressure
Relief
Valve
The
isola
Ɵ
on
valves
provide
the
ability
to
isolate
the
water
heater
from
the
structure’s
plumbing
and
allow
quick
access
to
fl
ush
the
heat
exchanger.
Check
with
local
codes
to
determine
if
a
pressure
and
temperature
relief
valve
is
required.
The
included
valves
meet
American Na
Ɵ
onal Standard (ANSI
Z21.10.3) / Canadian Standard (CSA 4.3)
and
are
ANSI/NSF
61
approved
for
potable
water.
Isola
Ɵ
on
Valves
Installa
Ɵ
on
Instruc
Ɵ
ons:
1.
Wrap
the
ends
of
the
threaded
water
inlet
&
outlet
on
the
tankless
water
heater,
as
well
as
the
threaded
end
of
the
approved
pressure
relief
valve
with
a
minimum
of
5
wraps
of
Te
fl
on®
tape.
2.
Screw
the
pressure
relief
valve
into
the
3/4”
threads
opposite
the
wing
handle
on
the
HOT
water
service
valve.
(RED
drain
handle)
(see
Pressure
Relief
Valve
Sec
Ɵ
on
for
proper
installa
Ɵ
on
requirements)
3.
Loosen
the
3/4”
union
nut
on
the
HOT
water
valve
and
connect
to
the
HOT
water
outlet
on
the
tankless
water
heater.
If
nut
is
removed,
ensure
that
you
realign
the
tailpiece
accurately
to
the
valve
and
that
the
black
washer
is
posi
Ɵ
oned
such
that
the
raised
metal
edge
of
the
valve
is
inside
the
washer.
4.
Align
the
direc
Ɵ
on
of
the
HOT
water
drain
to
the
desired
posi
Ɵ
on.
5.
Tighten
the
union
assembly
to
the
HOT
water
valve
using
approximately
15
foot
lbs
of
torque.
6.
Repeat
steps
3
Ͳ
5
for
the
COLD
water
valve.
(BLUE
drain
handle)
for
connec
Ɵ
on
to
the
COLD
water
inlet
on
the
tankless
water
heater.
7.
Connect
the
INLET
on
the
COLD
water
valve
to
the
MAIN
SOURCE
of
the
water
supply.
8.
Connect
the
OUTLET
on
the
HOT
water
valve
to
the
HOT
WATER
plumbing
system.
9.
Ensure
that
both
drain
valve
lever
handles
are
in
the
closed
posi
Ɵ
on
(perpendicular
to
the
drain
por
Ɵ
on
of
the
body).
Pressure
Relief
Valve
Installa
Ɵ
on
Instruc
Ɵ
ons:
The
PRV
must
be
connected
by
the
threaded
connec
Ɵ
on
opposite
the
wing
handle
on
the
hot
water
valve
(designated
by
the
RED
drain
handle)
or
the
threaded
connec
Ɵ
on
on
the
side
of
the
reloca
Ɵ
on
fi
ƫ
ng
above
the
hot
water
valve.
Installa
Ɵ
on
must
maintain
a
¾”
port
size
with
no
shut
o
ī
valve
or
line
restric
Ɵ
on
in
Ͳ
between
the
appliance
and
the
PRV.
The
discharge
line
from
the
PRV
should
pitch
downward
and
terminate
6”
above
drains
where
discharge
will
be
clearly
visible.
The
discharge
end
of
the
line
shall
be
plain
(unthreaded)
and
a
minimum
of
¾”
in
diameter.
The
discharge
line
material
must
be
suitable
for
water
at
least
180°
Fahrenheit
and
can
be
no
more
than
30
feet
in
length
and
contain
no
more
than
4
elbows
or
bends.
No
valve
of
any
type
may
be
installed
in
the
discharge
line
of
the
pressure
relief
valve.
Pressure
Relief
Valve
Maintenance:
For
proper
care
of
this
approved
pressure
relief
valve,
it
is
recommended
that
the
valve
is
manually
operated
once
a
year.
In
doing
so,
it
will
be
necessary
to
take
precau
Ɵ
ons
with
regard
to
the
discharge
of
poten
Ɵ
ally
scalding
hot
water
under
pressure.
Ensure
discharge
has
a
place
to
fl
ow.
Contact
with
your
body
or
other
property
may
cause
damage
or
harm.
Please
note
that
only
the
PRV
in
this
package
is
cer
Ɵ
fi
ed
by
CSA
Interna
Ɵ
onal
as
an
approved
item.
A
Pressure
Relief
Valve
(PRV)
B
PRV
Discharge
Outlet
C
Hot
Ball
Valve
Drain
Handle
D
Cold
Ball
Valve
Drain
Handle
A
B
C
D
Summary of Contents for RL75e REU-VC2528WD(A)-US
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Page 83: ...VC Series Manual 83...
