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98618/035-20009-001
Rev. B (1205)
SPECIFIC
SAFETY
RULES
AND
PRECAUTIONS
1.
Only Natural gas or Propane (LP) gas are approved for use with
this furnace.
Refer to the furnace
rating plate or Section
IV of
these instructions.
2.
Install this furnace only in a location and position as specified
in
SECTION I of these instructions.
3.
A gas-fired furnace for installation in a residential garage must be
installed as specified in SECTION I of these instructions.
4.
Provide adequate
combustion
and ventilation
air to the furnace
space as specified in SECTION VII of these instructions.
5.
Combustion
products must be discharged
outdoors.
Connect this
furnace to an approved
vent system only, as specified
in SEC-
TION VII of these instructions.
AWARNING
FIRE OR EXPLOSION
HAZARD
Failure to follow the safety warnings exactly could result in serious
injury, death or property damage.
Never test for gas leaks with an open flame. Use a commercially
available
soap solution made specifically
for detection of leaks to
check all connections.
A fire or explosion may result causing prop-
erty damage, personal injury or loss of life.
6.
Test for gas leaks as specified
in SECTION
IX of these instruc-
tions.
7.
Always install the furnace to operate within the furnace's intended
temperature rise range. Only connect the furnace to a duct system
which has an external static pressure within the allowable range,
as specified on the furnace rating plate.
8.
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 may also be handled by duct(s) sealed to the furnace
casing and terminating
outside the space containing
the furnace.
The return air duct system is not required by the furnace manufac-
turer provided the combustion
air and vent system
have been
installed and maintained
as a Two Pipe Sealed Combustion
Air
System and provided a return air duct system and return air ple-
num are not required by state, local, or regional codes.
9.
It is permitted to be use the furnace for heating of buildings
or
structures
under construction.
Installation
must comply with all
manufacturer's
installation instructions
including:
Proper vent installation;
Furnace operating under thermostatic
control;
Return air duct or air filter rack must be sealed to the furnace;
•
Air filters in place;
Set furnace
input rate and temperature
rise per rating plate
marking;
Means for providing outdoor air required for combustion;
Return air temperature
maintained
between
55°F (13°C) and
80°F (27°C);
•
The air filter must be replaced or thoroughly cleaned upon sub-
stantial completion of the construction
process;
Clean furnace,
duct work and components
upon substantial
completion
of the construction
process,
and verify furnace-
operating conditions
including
ignition, input rate, temperature
rise and venting, according to the manufacturer's
instructions.
The following
requirements
to be met:
a.
Clean, outside combustion
air is provided to the furnace to
minimize
the impact
of corrosive
adhesives,
sealants, and
other construction
materials.
Drywall dust is a major concern
during construction,
which can be pulled into the combustion
air path, leading to plugged heat exchangers,
burners, and
inducer assemblies.
10.
11.
12.
13.
14.
15.
b.
Filter must be installed
in the furnace
as specified
in the
installation
instructions,
and must be replaced or thoroughly
cleaned prior to occupancy of the home.
Again, drywall dust
is the key issue, as that dust can be pulled into the circulating
blower motor, plugging
the motor vents, coating the rotors
and stators, etc. which can lead to a potential fire hazard.
c.
The temperature
of the return air to the furnace must not be
less than 55° F (13 ° C), with no evening setback or furnace
shutdown,
to prevent
condensation
in the primary
heat
exchangers.
d.
The air temperature
rise must be within the stated rise range
as indicated on the furnace rating plate, and the firing input
rate must be set to the unit nameplate value.
e.
The external static pressure
of the air distribution
system
ductwork must at set for heating operation to be at least 0.10
to 0.20 inches water column,
based on the input rate of the
furnace, with the lower value for input rates less than 55,000
btu/hr and the upper value for units with input rates above
100,000 btu/hr.
f.
A return air duct must be used for non-direct vent installations
in a modular home or building constructed
on site. The return
duct must be sealed to the furnace cabinet, and terminated
outside the space where the furnace
is installed.
This pre-
vents any recirculation
of supply air, which can generate
a
negative pressure condition for non-direct vent furnaces lead-
ing to possible flame rollout or combustion
problems.
g.
The furnace
and ductwork should
be thoroughly
and com-
pletely cleaned
prior to occupancy
of the dwelling to insure
the proper operation
of the furnace
and to avoid potential
health concerns.
In Canada refer to the Natural Gas and Propane Installation code,
section on Central
Furnaces.
When installed in a Manufactured
(Mobile) Home, combustion
air shall not be supplied from occu-
pied spaces.
The size of the unit should be based on an acceptable heat loss
calculation
for the structure. ACCA, Manual J or other approved
methods may be used.
Manufactured
(Mobile) Home and Modular Home Installation:
This appliance must be installed in a (sealed combustion) configu-
ration using a roof jack vent system.
A roof jack is the only
approved vent system that can be used to vent this appliance.
Modular Home Definition:
Factory-built
home constructed
to the
state, local, or regional code where the house will be located. The
home is transported
in one or more modules and joined at the
home site.
Manufactured
(Mobile)
Home
Definition:
Factory-built
home
constructed,
transported
and installed under the federal building
code administered
by the U.S. Department
of Housing and Urban
Development
(HUD Code), rather than to building codes at their
destination. The house is built, transported
and installed on a non-
removable chassis.
This furnace
is not approved
for installation
in trailers or recre-
ational vehicles.
SAFETY
REQUIREMENTS
•
A manufactured
(mobile) home installation must conform with the
Manufactured
Home Construction
and Safety Standard, Title 24
CFR, Part 3280, or when such standard
is not applicable,
the
standard
for
Manufactured
Home Installations
(Manufactured
Home Sites, Communities,
and Set-ups) ANSI/NCS A225.1, and/
or the Canadian Standard for CAN/CSA
Z240 MH, Series M92
Mobile Homes. Furnaces have been certified to the latest edition
of standard ANSI Z21-47 • CSA 2.3
Refer to the unit rating plate for the furnace model number, and
then see the dimensions
page of this instruction for return air ple-
num dimensions
in Figure 1. The plenum and!or filter rack must
be installed according to the instructions.
2
Unitary Products Group
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