3
TABLE OF CONTENTS
SAFETY CONSIDERATIONS
3
. . . . . . . . . . . . . . . . . . . . . . . . . .
CODES AND STANDARDS
5
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Installation
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion and Ventilation Air
5
. . . . . . . . . . . . . . . . . . . . . . . .
Duct Systems
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acoustical Lining and Fibrous Glass Duct
5
. . . . . . . . . . . . . . . .
Gas Piping and Gas Pipe Pressure Testing
5
. . . . . . . . . . . . . . . .
Electrical Connections
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
7
. . .
INTRODUCTION
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPLICATIONS
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Upflow Applications
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Downflow Applications
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horizontal Left (Supply-Air Discharge) Applications
12
. . . . . .
Horizontal Right (Supply-Air Discharge) Applications
13
. . . . .
LOCATION
16
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General
16
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Furnace Location Relative to Cooling Equipment
17
. . . . . . . . .
Hazardous Locations
17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Furnace Location and Application
17
. . . . . . . . . . . . . . . . . . . . .
AIR FOR COMBUSTION AND VENTILATION
18
. . . . . . . . . .
INSTALLATION
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leveling Legs (If Desired)
21
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation in Upflow and Downflow Applications
21
. . . . . . .
Installation in Horizontal Applications
21
. . . . . . . . . . . . . . . . .
Air Ducts
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter Arrangement
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bottom Closure Panel
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Piping
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Connections
28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal of Existing Furnaces from
Common Vent Systems
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion Air and Vent Pipe Systems
31
. . . . . . . . . . . . . . . . .
Condensate Drain
46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START-UP, ADJUSTMENTS, AND SAFETY CHECK
47
. . . . .
General
47
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prime Condensate Trap With Water
48
. . . . . . . . . . . . . . . . . . . .
Purge Gas Lines
48
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Sequence of Operation
48
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Check Safety Controls
60
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checklist
61
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SAFETY CONSIDERATIONS
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in unit component
damage.
Application of this furnace should be indoors with special
attention given to vent sizing and material, gas input rate, air
temperature rise, unit leveling, and unit sizing.
CAUTION
!
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
Improper
installation,
adjustment,
alteration,
service,
maintenance, or use can cause carbon monoxide poisoning,
explosion, fire, electrical shock, or other conditions which may
cause personal injury or property damage. Consult a qualified
installer, service agency, local gas supplier, or your distributor
or branch for information or assistance. The qualified installer
or agency must use only factory-authorized and listed kits or
accessories when modifying this product.
!
WARNING
Installing and servicing heating equipment can be hazardous due
to gas and electrical components.
Only trained and qualified
personnel should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations
must be performed by trained service personnel. When working
on heating equipment, observe precautions in literature, on tags,
and on labels attached to or shipped with unit and other safety
precautions that may apply.
These instructions cover the minimum requirements and conform
to existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing
residential construction practices. We require these instructions as
a minimum for a safe installation.
Wear safety glasses and work gloves.
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 and gloves when
handling parts.
CAUTION
!
Have a fire extinguisher available during start-up and adjustment
procedures and service calls.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand these 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 hazards
which
could
result in personal injury or death. CAUTION is used
to identify unsafe practices which
may
result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which
will
result in enhanced installation,
reliability, or operation.