c. Slideontomountingplate.(Bottomrearslots
on furnaceshouldengagewith mounting
platetabs.)
d.Securefrontwith one(1) fastenerat each
corner(SeeFigure13or 14).
NOTE:Additionalfastenersmay be usedat
rear,sidesorthroughdoorframe,asdesired,
to securefurnaceto closetor alcoveframing.
VENTING AND COMBUSTION AIR
REQUIREMENTS
/!X CAUTION:
Snow must not be allowed to restrict or
block the combustion air intake or vent
pipes.
General
NORDYNE condensing furnaces must be
installed with outdoor combustion air piped
directly to the furnace. Codes refer to this
type of installation as direct vent, or two pipe
installation.
Provisions must be made for adequate supply
of air for combustion and ventilation. For
United States installations, the adequacy of air
provisions can be determined by consulting
the current version of the National Fuel Gas
Code (ANSI Z223.1/NPFA=54). For Canadian
installations, requirements are specified in the
National Standard of Canada (CAN/CGA
B149.1 & .2). Consult local codes for special
requirements.
NOTE: If the furnace is operated without
adequate air for combustion and ventilation, it
may not perform properly. Furnace
components may be strained by high
temperature and could fail prematurely.
/ WARNING:
The combustion air piping must not be
blocked or restricted in any manner.
/ WARNING:
Furnace installation using methods other
than those described in the following
sections must comply with the National
Fuel Gas Code and all applicable local
codes to provide sufficient combustion
air for the furnace.
CAUTION:
Do not allow debris to fall into the fur=
nace. This could cause unsafe opera-
tion and voids the furnace warranty.
VENTING REQUIREMENTS
/ WARNING:
FURNACE MUST NOT BE COMMON
VENTED WITH OTHER APPLIANCES.
General
This section specifies installation requirements
for 2-pipe combustion air piping. The capacity
table provided in this section applies to the
maximum equivalent lengths of vent and
combustion air intake pipe.
These condensing furnaces are classified as
"Category IV" appliances, which require special
venting materials and installation procedures.
Category IV appliances operate with positive
vent pressure and therefore require vent
systems which are thoroughly sealed. They
also produce combustion condensate, which
is slightly acidic and can cause severe
corrosion of ordinary venting materials.
Furnace operation can be adversely affected
by restrictive vent and combustion air piping.
Therefore, vent and combustion air piping
lengths must conform completely to the
requirements of Table 6, page 15.
The furnace must be vented to the outdoors.
14
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