6
Giant
Manual
A
licensed
professional
must
install
the
appliance,
inspect
it,
and
leak
test
it
before
use.
The
warranty
will
be
voided
due
to
improper
installation.
The
installer
should
have
skills
such
as:
gas
sizing
connecting
gas
lines,
water
lines,
valves,
and
electricity
knowledge
of
applicable
national,
state,
and
local
codes
installing
venting
through
a
wall
or
roof
Venting
Category
I,
Fan
Assist
Appliances
per
NFPA54
and
local
codes
If
you
lack
these
skills
contact
a
licensed
professional.
Installation
Instructions
Installation
Steps
Determine
Installation
Location
................
8
Typical
Installation
Illustration
..................
9
Installation
Location
................................
11
Checklist
to
Determine
Installation
Location
................................
12
Combustion
Air
Requirements
...........
13
‐
15
Venting
Requirements
........................
16
‐
19
Checklist
for
Combustion
Air
and
Venting
Requirements
......................
20
Installation
of
Plumbing
...........................
21
Checklist
for
Plumbing
.............................
22
Massachusetts
‐
Required
Plumbing
.........
23
Installation
of
Gas
Supply
...................
24
‐
25
Connect
Electricity
...................................
26
Adjust
for
High
Altitude
...........................
26
Checklist
for
Gas
and
Electricity
..............
26
Final
Checklist
..........................................
27
General
Instructions
Installer
Qualifications
DO
NOT
Do
not
install
the
UG40
‐
92TFTT
‐
N2U
or
UG40
‐
92TFTT
‐
P2U
outdoors.
Do
not
install
the
appliance
in
an
area
where
water
leakage
of
the
unit
or
connections
will
result
in
damage
to
the
area
adjacent
to
the
appliance
or
to
lower
floors
of
the
structure.
When
such
locations
cannot
be
avoided,
it
is
recommended
that
a
suitable
drain
pan,
adequately
drained,
be
installed
under
the
appliance.
The
pan
must
not
restrict
combustion
air
flow.
Do
not
obstruct
the
flow
of
combustion
and
ventilation
air.
Do
not
use
this
appliance
in
an
application
such
as
a
pool
or
spa
heater
that
uses
chemically
treated
water.
(This
appliance
is
suitable
for
filling
large
or
whirlpool
spa
tubs
with
potable
water.)
Do
not
use
substitute
parts
that
are
not
authorized
for
this
appliance.
MUST
DO
The
installation
must
conform
with
local
codes
or,
in
the
absence
of
local
codes,
with
the
National
Fuel
Gas
Code,
ANSI
Z223.1/NFPA
54
,
or
the
Natural
Gas
and
Propane
Installation
Code,
CSA
B149.1
.
The
appliance,
when
installed,
must
be
electrically
grounded
in
accordance
with
local
codes
or,
in
the
absence
of
local
codes,
with
the
National
Electrical
Code,
ANSI/NFPA
70
,
or
the
Canadian
Electrical
Code,
CSA
C22.1.
The
appliance
and
its
appliance
main
gas
valve
must
be
disconnected
from
the
gas
supply
piping
system
during
any
pressure
testing
of
that
system
at
test
pressures
in
excess
of
1/2
psi
(3.5
kPa)
(13.84
in
W.C.).
The
appliance
must
be
isolated
from
the
gas
supply
piping
system
by
closing
its
individual
manual
shutoff
valve
during
any
pressure
testing
of
the
gas
supply
piping
system
at
test
pressures
equal
to
or
less
than
1/2
psi
(3.5
kPa)
(13.84
in
W.C.).