Trane GRCA - Page 8

The venting is an integral
part of the unit and
must
not
be altered
in
the
field. The Natural Vented
units are
equipped with
a
ventcap which is designed
for natural
draft venting. Air for
combustion
enters
the base of the
vent
cap through
a
protective grill
and products of
com-
bustion are
discharged at
the upper section of the vent
cap.
CAUTION
: Insure
that all power
sources conform to
th
e un i t
requirements
or damage to the
unit may
result
Installation
must
be made in accordance with
local codes,
or in
the absence of local
codes, with the latest edition
of
ANSI Standard
Z223.1 (N.F.P.A. No. 54) National
Fuel
Gas
Code.
All
of
the
AN SI
and N FPA Standards referred
to in
these installation
instructions
are
those that were
applicable
at the time
the
design
was certified.
The ANSI
Standards are
available from the American
Gas
Association,
1515 Wilson Blvd., Arlington,
Virginia 22209.
The
NFPA Standards
are available
from the N ational
Fire
Protection
Association,
Batterymarch Park,
Quincy, MA
02269.
If
installed in
Canada,
the installation must conform
with
local
building
codes, or in
the absence of local building
codes, with the
current
CAN/CGA-B149.1 or
B149.2
"Installation
Codes for
Gas
Burning
Appliances
and
Equipment'.
T hese outdoor
duct furnaces
have been
designed
for
and certified to
comply with CAN/CGA
2.8.
These units
have
been designed
cert
i
f i ed
for
outdoor
u se only ,
and may
be located on the
roof of the building
or at
any
convenient location
external to
the building to
be
heated.
This
vent cap is shipped
in a separate carton and should
be installed
per the Venting section of the Outdoor
Rooftop
Gas-Fired Duct Furnace Installation
and
Service Manual.
The Power Vented unit has
a
induced
draft
venting
system.
The
combustion
air inlet and prod-
ucts of
combustion discharge grills
are
located
in the
upper section of the Duct
Furnace side access panel.
A pilot
burner plate is provided
in
the Duct
Furnace for
access to the pilot burner
and
ignition
system without
removing
the burner drawer.
Clearance between the
external
unit and any obstruction
must be sufficient for
proper servicing
of pull out burner drawer.
See
Figure
2
for this clearance.
These units
are certified for operation on either natural
or propane
gases. If
a
unit
is
to
be
installed
at an altitude
exceeding
2000 feet (610
m)
above
sea level, Berate the
unit input of
each duct furnace by 4% for each
1000
feet
(305 m) above sea level.
Special main burner gas orifices
are required
for installations above
2000 feet (610 m).
In Canada, if unit
is to
be
installed at altitudes
of 2000
feet (610 m) to 4500 feet
(1372 m), each duct furnace
must have the main
burners re-orificed to give
90% of
the
normal altitude input rating.
If the unit was
ordered from the factory
for high altitude
operation , confirm
input rating . See
Gas Input
Adjustment .
re 2A
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