Trane GRCA - Rigging and Mounting Procedures

Figure 2B
18"
(457
mm)
A
I
R FLOW
(45
7
mm)
Blower
c
0
U
0
U
U
W
Duct Furnace
I
Duct F urnace
D3 8 6 5
F*
"`
Refer
to Outdoor Duct Furnace Manual
for
spec
i
fic
clearances .
Supply Plenum
16"--
.
(457 mm)
If
a
single, double or triple duct furnace only
unit
is
III .
INSTALLATION
connected to
a
return air duct or any
other inlet air
restriction, the appliance shall be
installed
on
the
positive pressure
side of
the
air
circulating blower.
Installation
must conform with local building
codes
or in the absence
of
local codes with the
National
Fuel Gas Code ANSI
Z223 . 1
latest edi -
t i on
.
A heat
loss study and
a
complete layout
of
the sys-
tem
should
be made
first.
When
locating the unit in its permanent location,
make certain that the roof
is
capable of carrying the
additional load of
the
equipment. Check the unit net
weights section
of
this
manual .
Make certain that clearances are provided
for
ser-
vice,
minimum clearance to combustible material and
to
venting
cap. See figure 2 for
this
information.
Ducts
connected to units
which
do not have
either
a
blower
section
or a supply
plenum must have
a
removable access panel in the
duct,
which is con-
nected to a duct furnace. The duct openings shall be
accessible when the unit
is
installed in service and
shall
be
of such size that
smoke or
reflected light
may be observed inside the casing to indicate the
presence of leaks in the heating element. The covers
for the panels shall be attached in such manner as to
prevent
leaks.
Ducts
exposed to
the outdoors
must
be insulated
and sealed
to
prevent
water
from enter-
ing either
the unit
or
building
through
the
duct.
CAUTION: Remove wooden shipping support
from beneath
blower housing
of
Blower Section
to prevent possible unit damage or improper
unit
operation (if applicable).
INSTALLATION
CLEARANCES
Minimum clearances to combustible
material are
shown on the unit data
plate. It
is
important that
clearances be maintained for
servicing the unit (refer
to Submittal Insert for service clearances),
and that
minimum clearances are provided
from the unit
(including
vent
cap, if
Natural Vent model)
to
com-
bustible material. Clearances around
the outside air
hood (if unit is so equipped)
must
be
unobstructed.
See Figure 2.
MOUNTING ON FIELD FURNISHED SUPPORTS
Single, double,
triple
duct
furnace only models have
base rails which
are
suitable for
mounting either
directly
on
solid planking or steel
channels. N ever
install the unit on a soft
roof where the rails could
sink, reducing clearance between the bottom
panel
and the roof, or cause damage to
the roofing surface.
All other models must use
the following method
or
an
equivalent when
unit supports are field
furnished:
Each
section of the Rooftop
unit must be
supported,
which includes supports located
at both ends.
If
the
unit consists of a High CFM
Blower section, a DX
Coil,
a
Duct Furnace and a
Supply Plenum, five sup-
ports are required.
See
Figure
3.
-5-