Carrier N80MSN Installation, Start-Up, Operating And Service And Maintenance Instructions page 21

N80MSN/N80MSL: Installation, Start–Up, Operating and Service and Maintenance Instructions
detergent, paint, glue, aerosol spray, bleach, cleaning solvent, salt, and
air freshener, and can cause corrosion of furnaces and vents. Avoid using
such products in the combustion-air supply. Furnace use during
construction of the building could cause the furnace to be exposed to
halogen compounds, causing premature failure of the furnace or venting
system due to corrosion.
Vent dampers on any appliance connected to the common vent can cause
condensation and corrosion in the venting system. Do not use vent
dampers on appliances common vented with this furnace.
Additional Venting Requirements
A 4" (101 mm) round vent elbow is supplied with the furnace. A 5-inch
(127 mm) or 6- inch (152 mm) vent connector may be required for some
model furnaces. A field-supplied 4-inch-to-5-inch (101 - 127 mm) or
4-inch-to-6-inch (101 - 152 mm) sheet metal increaser fitting is required
when 5-inch (127 mm) or 6-inch (152 mm) vent connector is used. See
Fig. 31 - Fig. 43 Venting Orientation for approved vent configurations.
NOTE: Vent connector length for connector sizing starts at furnace vent
elbow. The 4-inch vent elbow is shipped for upflow configuration and
may be rotated for other positions. Remove the 3 screws that secure vent
elbow to furnace, rotate furnace vent elbow to position desired, reinstall
screws. The factory-supplied vent elbow does NOT count as part of the
number of vent connector elbows.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing, safety glasses and gloves when
handling parts and servicing furnaces.
The vent connector can exit the furnace through one of 5 locations on the
casing.
Caution!! For the following applications, use the minimum vertical vent heights as specified below.
FURNACE
ORIENTATION
Downflow
Horizontal Left
Horizontal Left
Horizontal Left
Downflow
Downflow
*. 4 in. (102 mm) inside casing or vent guard
†. Including 4 in. (102 mm) vent section(s)
NOTE: All vent configurations must also meet National Fuel Gas Code venting requirements NFGC
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
For all other applications, follow exclusively the National Fuel Gas Code.
VENT ORIENTATION
Vent elbow left, then up Fig. 35
Vent elbow right, then up Fig. 43
Vent Elbow up Fig. 41
Vent elbow right Fig. 40
Vent elbow up then left Fig. 31
Vent elbow up, then right Fig. 38
1. Attach the single wall vent connector to the furnace vent elbow, and
fasten the vent connector to the vent elbow with at least two
field-supplied, corrosion-resistant, sheet metal screws located 180°
apart.
NOTE: An accessory flue extension is available to extend from the
furnace elbow to outside the furnace casing. See Specification Sheet for
accessory listing. If flue extension is used, fasten the flue extension to
the vent elbow with at least two field-supplied, corrosion-resistant, sheet
metal screws located 180° apart. Fasten the vent connector to the flue
extension with at least two field-supplied, corrosion resistant sheet metal
screws located 180° apart.
2. Vent the furnace with the appropriate connector (see
Fig. 43).
3. Determine the correct location of the knockout to be removed.
4. Use a hammer and screwdriver to strike a sharp blow between the
tie points and work the slug back and forth until the slug breaks
free.
An accessory Vent Guard Kit is REQUIRED for downflow applications
where the vent exits through the lower portion of the furnace casing. See
Fig. 35 and Specification Sheet for accessory listing. Refer to the Vent
Guard Kit Instructions for complete details.
The horizontal portion of the venting system shall slope upwards not less
than 1/4-in. per linear ft. (21 mm/M) from the furnace to the vent and
shall be rigidly supported every 5 ft. (2 M) or less with metal hangers or
straps to ensure there is no movement after installation.
Sidewall Venting
This furnace is not approved for direct sidewall horizontal venting.
Per section 12.4.3 of the current edition of NFPA54/ANSI Z223.1, any
listed mechanical venter may be used, when approved by the authority
having jurisdiction.
Select the listed mechanical venter to match the BTUh input of the
furnace being vented.
requirements for venting and termination included with the listed
mechanical venter.
FURNACE INPUT
(BTUH/HR)
154,000 132,000 110,000
154,000 132,000
154,000 132,000
154,000
110,000
110,000
21
Follow all manufacturer's
MIN. VENT MIN. VERTICAL VENT
DIAMETER HEIGHT
*
IN. (mm) FT. (M)
5 (127) 12 (3.6)
5 (127) 7 (2.1)
5 (127) 7 (2.1)
5 (127) 7 (2.1)
5 (127) 10 (3.0)
5 (127) 10 (3.0)
Fig. 31 -
installation
†