Venting And Combustion; Air Requirements; Venting Requirements - Nordyne M2RC-080 Installation Instructions Manual

4. At area"B",bendthe ducttabs up and
back over,aroundthe duct connector,
(SeeStep3).
5. Fold/form theductflapagainst t hesideof
theductconnector
and attach as shown,
(See Step 4). Use three (3) staples
(minimum) on each duct flap OR, if a 2X
block/joist is not provided, use two (2)
sheet metal screws (minimum) on each
duct flap. An alternate attachment method
is acceptable, as long as the plenum is
securely attached.
6. Tape the duct flap edges with an approved
tape for a leak-free joint.
INSTALL DOWNFLOW FURNACE
a. Prepare the NC coil box as described in
the instructionsprovidedwith the coil box.
b. Place A/C coil box onto duct connector.
c. Slide A/C coil box back until it is firmly
against the mounting plate. Mounting
plate tabs should be bent upwards so as
not to interfere with furnace.
d. Secure front with one (1) fastener at
each corner through front bottom flange
and through the back of the A/C coil box.
e. Position the furnace on top ofthe A/C coil
box. Ensure that the furnace is properly
positioned on the wrapper.
f. Secure the A/C coil box to the bottom of
the furnace. The A/C coil box can be
secured to the furnace using the provided
attachment brackets. These brackets
are designed to attach the furnace
cabinet to the AJC coil box on the sides.
To install these brackets, position one
bracket on the side of the furnace, so that
the locating dimples are in the groove
created by the bottom of the furnace
cabinet and the top of the A/C coil box.
Using the provided self-drilling screws,
secure the bracket to the A/C coil box
and to the furnace. Repeat on the other
side of the furnace for the other bracket.
NOTE: Additional fasteners may be used at
rear, sides or through door frame, as desired,
to secure furnace to closet or alcove framing.
VENTING AND COMBUSTION AIR
REQUIREMENTS
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,
z WARNING:
Fumace 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 fumace,
VENTING REQUIREMENTS
/t',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 total
sum of vent and combustion air piping lengths.
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