Giant
Manual
21
Installa
Ɵ
on of Plumbing
A
manual
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
no
potable
water
hea ng
appliance.
Ensure
that
the
water
fi
lter
on
the
water
heater
is
clean
and
installed.
Piping
Requirements
Temperature
&
Pressure
‐
Relief
Valve
Requirements
Install
the
Temperature
&
Pressure
‐
Relief
(T&P)
Valve
according
to
these
instruc ons.
This
water
heater
is
provided
with
a
properly
cer
fi
ed
Temperature
&
Pressure
‐
Relief
Valve
by
the
manufacturer.
An
approved
Temperature
&
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
T&P
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
T&P
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
T&P
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
T&P
valve
must
be
rated
up
to
150
psi
and
to
at
least
the
maximum
BTU/hr
of
the
appliance.
The
discharge
from
the
T&P
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
Temperature
&
Pressure
‐
Relief
Valve
must
be
manually
operated
once
a
year
to
check
for
correct
opera on.
The
T&P
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
T&P
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.