For All Units; Introduction - Carrier N96MSN Installation, Start-Up, Operating And Service And Maintenance Instructions

N96MSN: Installation, Start-up, Operating and Service and Maintenance Instructions
Understand the signal words DANGER, WARNING, and CAUTION.
These words are used with the safety-alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury or
death. WARNING signifies a hazard which could result in personal
injury or death. CAUTION is used to identify hazards which may result
in minor personal injury or product and property damage. NOTE and
NOTICE are used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
1. Use only with type of gas approved for this furnace. Refer to the
furnace rating plate.
2. Install this furnace only in a location and position as specified in the
"Location" section of these instructions.
3. Provide adequate combustion and ventilation air to the furnace
space as specified in "Air for Combustion and Ventilation" section.
4. Combustion products must be discharged outdoors. Connect this
furnace to an approved vent system only, as specified in the
"Venting" section of these instructions.
5. Never test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for the detection of leaks
to check all connections, as specified in the "Gas Piping" section.
6. Always install furnace to operate within the furnace's intended
temperature-rise range with a duct system which has an external
static pressure within the allowable range, as specified in the
"Start-Up, Adjustments, and Safety Check" section. See furnace
rating plate.
7. When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace, the
return air shall also be handled by duct(s) sealed to the furnace
casing and terminating outside the space containing the furnace.
See "Air Ducts" section.
8. A gas-fired furnace for installation in a residential garage must be
installed as specified in the warning box in the "Location" section.
9. The furnace may be used for construction heat provided that the
furnace installation and operation complies with the first
CAUTION in the LOCATION section of these instructions.
10. These Multipoise Gas-Fired Furnaces are CSA design-certified for
use with natural and propane gases (see furnace rating plate) and for
installation in alcoves, attics, basements, closets, utility rooms,
crawlspaces, and garages. The furnace is factory-shipped for use
with natural gas. A CSA (A.G.A. and C.G.A.) listed accessory gas
conversion kit is required to convert furnace for use with propane
gas.
11. See Table 2 for required clearances to combustible construction.
Table 2 – Minimum Clearances to Combustible Materials

for All Units

POSITION
REAR
FRONT (Combustion air openings in
furnace and in structure)
Required for service
All Sides of Supply Plenum
Sides
Vent
Top of Furnace
*. Consult local building codes
12. Maintain a 1-in. (25 mm) clearance from combustible materials to
supply air ductwork for a distance of 36 in. (914 mm) horizontally
from the furnace. See NFPA 90B or local code for further
requirements.
13. These furnaces SHALL NOT be installed directly on carpeting,
combustible tile, or any other combustible material other than wood
flooring. In downflow installations, factory accessory floor base
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

INTRODUCTION

This 4-way multipoise Category IV condensing furnace is CSA
design-certified as a direct-vent (2-pipe) furnace for 40,000 BTUh
through 140,000 BTUh models using outside air for combustion. The
26,000 BTUh model can use the same 2-pipe venting system using
outside air for combustion but is not considered direct vent.
A non-direct vent (1-pipe) furnace for all models using indoor air for
combustion or from a well-ventilated attic or crawl space, where
permitted by local code. See
use with natural gas. The furnace can be converted in the field for use
with propane gas when a factory-supplied conversion kit is used. Refer
to the furnace rating plate for conversion kit information.
These furnaces are not approved for installation in recreational vehicles
or outdoors. Single-stage furnaces (40,000 BTUh through 120,000
CLEARANCE
BTUh) are approved for installation in manufactured housing/mobile
0
homes with manufacturer-approved accessory. The accessory conversion
1 in. (25 mm)
kit is required for use with both natural and propane gas. The furnace
*
24 in. (610 mm)
must also be installed on a factory-supplied accessory combustible floor
*
1 in. (25 mm) base or evaporator coil casing.
0
This furnace is designed for minimum continuous return-air temperature
0
of 60°F (15°C) db or intermittent operation down to 55°F (13°C) db such
1 in. (25 mm)
as when used with a night setback thermostat. Return-air temperature
must not exceed 80°F (27°C) db. Failure to follow these return-air
temperature limits may affect reliability of heat exchangers, motors, and
controls. See
5
MUST be used when installed on combustible materials and wood
flooring. Special base is not required when this furnace is installed
on manufacturer's cased evaporator coils or when manufacturer's
evaporator coil casing is used. See
combustible construction information.
14. Inspect and ensure all casing opening not used for vent, gas,
electrical or auxiliary are filled with knockouts or casing plugs.
NOTICE
!
IMPORTANT INSTALLATION AND START-UP PROCEDURES
Failure to follow this procedure may result in a nuisance smoke or odor
complaint.
The manifold pressure, gas rate by meter clocking, temperature rise and
operation must be checked after installation. Minor smoke and odor
may be present temporarily after start-up from the manufacturing
process. Some occupants are more sensitive to this minor smoke and
odor. It is recommended that doors and windows be open during the
first heat cycle.
THE BLOWER IS LOCATED
TO THE RIGHT OF THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED TO THE LEFT.
THE BLOWER IS
LOCATED ABOVE THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED DOWNWARD
Fig. 2 – Multipoise Orientations
Fig.
Fig. 3.
Table 2 for clearance to
THE BLOWER IS
LOCATED BELOW THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED UPWARD.
THE BLOWER IS
LOCATED TO THE LEFT
OF THE BURNER SECTION,
AND CONDITIONED AIR IS
DISCHARGED TO THE RIGHT .
2. The furnace is factory-shipped for
A12181