5.
UNIT LOCATION
The lurnace shall
be
appropnately located to the supply and
retum air dIstribution system. (See "AIR DISTRIBUTION".
Page
9)
Sides and back of the furnace may
be
eoclosed
by
wall framing. (See "Minimum Clearances: Table
7.
and
Figures 3 through 5.)
The furnace installation
is
only ,ntended for free air retum
Ihmugh the furnace door louvers. DO NOT connect a dueled
return
a"
sySlem directly
to
the fumace. Improper installalion
may create a hazard and damage equIpment, as well
as
void
all warranties.
Furnace maybe Installed
on
combustible floOring when
USing
5elles-458 Duct Connectors (see Table
10
and FIgures 10·
17).
6.
MINIMUM CLEARANCES
Th,s heat",," apphance must
be
Installed
WIth
clearances
not
less than the minImUms shown
In
Table
7.
ThIS
heatIng
appliance must
be
Installed
With
ample clearance
lor
easy
acceSS
to
the air lilter. blower assembly. burner assembly.
controls, and vent connections.
Minimum
furnace
clearances
to
combustible
materialS
shall
be
In
accordance
with
Ihe
furnace
rallng
plate.
General clearances are as
follows:
a.
All IOstallat,ons; Back (0"), SIdes (0"). Top (6"), Duct
(0") and Roof Jack/Pipe (0")
b Alcove installations (see Ftgure
31:
minImum
18"
clearance at tront of turnace shall be provided lor
future sel\llcing. A removable access panel should be
III
ALL
MODELS
CLOSET
ALCOVE
Front
'"
""
Back
0"
0"
Sides
0"
0"
Roof
Jack/Pipes
0"
0"
Top
'"
'"
Plenum
Sides
0"
0"
Top
and
Sides
of
Duct
0"
0"
Bottom
of
DUCI
WIthin
0"
0"
installed between top
01
the "
..
mace door
I'ame
and
the cell,ng
c. Closet installatIons
mUSI
use a Iouve'ed door
haVIng
a minImum free area of 235
sq,
on.
when Iocaled
S"
from fumace
l$a<>
Figure
4),
For
speCIal
clearance
between
1,"
and 6". reqUIrements are a louvered door
wllh a minimum
of
250 sq
,n
Iree a'ea.
With
the
openmgs
In
the closet
Ooor
<mectly
in
hne
wnh the
louveredopeOlngs
,n
the furnace doo' ,A fuliy louvered
c10sel
door may
oe
use<J
(Sa<>
Figure
51.
A CAUTION:
HAZARD
OF
ASPHYXIATION:
Negative
pressure
Inside
the
closet,
with
closet
door
closed
and
the
furnace
blower
operating
on
high
speed,
shall
be
no
more
negative
than
minus
0,05
Inch
water
column.
7.
RETURN AIR PROVISIONS
U.S.A. home manufactures shall comply W'lh ali of the
follOWIng
condilions to have
U.L
acceptance of ceiling
or
m·
floor return all systems for
clOSe!
Installed forced airheanng
appliances;
---
/
..
".
,
•
,,~
..
•
a Regardless of the location. the return airopening mto
Ihe closet shall not
be
leSS
lhan specliied
in
lhe
appliance's I,stlng
b Means shall be provldedlOpreVenl lnadvenentclosure
by
a Ilat oblect placed ove' the return
a"
opening
when
It
IS
located In Ihe lloor of Ihe closet (versus lhe
ven>eal
fronl or Side walil
c,
The cross"sechonal area
01
the relurn
dUCI
system
leading into the closet, when located in the floo,
Or
ceiling shall not
be
less than 250 square ,nches.
d The total hee area ot open,ngs ,n the
Hoor
or ceiling
reglslers serving tne relurn air duct system must be
at
least 352 sq.in.
AI
leasl one reglste, should
be
Iocaled where it
is
not likely
10
be
covered by carpellng.
boxes and olhe, oblects,
Figure
2.
Ove",11
Dimensions
NORDYNE - manufaClUrer
of
lntertherm
Bnd
Miller
products
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