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18-CD29D1-11
Installer’s Guide
SAFETY SECTION
The following safety practices and precautions must be
followed during the installation, servicing, and opera-
tion of this furnace.
1. Use only with the 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 “Location and Clearances” (page 4), of these
instructions.
3. Provide adequate combustion and ventilation air to the
furnace space as specified in “Air for Combustion and
Ventilation” (pages 8-9), of these instructions.
4. Combustion products must be discharged outdoors. Con-
nect this furnace to an approved vent system only, as
specified in the “Venting” section (starting on page 15),
of these instructions.
5. Never test for gas leaks with an open flame. Use a com-
mercially available soap solution made specifically for
the detection of leaks to check all connections, as speci-
fied in “Gas Piping” (pages 31-32), of these instructions.
6. Always install the furnace to operate within the furnace’s
intended temperature-rise range with a duct system
which has an external static pressure within the al-
lowable range, as specified on the unit rating plate.
Airflow with temperature rise for cfm versus static is
shown in the Service Facts accompanying this furnace.
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 a duct(s) sealed to the furnace casing and
terminating outside the space containing the furnace.
8. A gas-fired furnace for installation in a residential garage
must be installed as specified in “Location and Clear-
ances” section (page 4), of these instructions.
▲
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each ap-
pliance connected to the venting system being placed
into operation could result in carbon monoxide poi-
soning or death.
The following steps shall be followed for each appli-
ance connected to the venting system being placed
into operation, while all other appliances connected to
the venting system are not in operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and hor-
izontal pitch, as required in the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149
Installation Codes and these instructions. Deter-
mine that there is no blockage or restriction, leak-
age, corrosion and other deficiencies which could
cause an unsafe condition.
3. As far as practical, close all building doors and
windows and all doors between the space in which
the appliance(s) connected to the venting system
are located and other deficiencies which could
cause an unsafe condition.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not con-
nected to the venting system. Turn on any ex-
haust fans, such as range hoods and bathroom ex-
hausts, so they are operating at maximum speed.
Do not operate a summer exhaust fan.
6. Follow the lighting instructions. Place the appli-
ance being inspected into operation. Adjust the
thermostat so appliance is operating continuously.
7. If improper venting is observed during any of the
above tests, the venting system must be corrected
in accordance with the National Fuel Gas Code,
ANSI Z221.1/NFPA 54 and/or CAN/CGA B149.1 In-
stallation Codes.
8. After it has been determined that each appliance
connected to the venting system properly vents
where tested as outlined above, return doors, win-
dows, exhaust fans, fireplace dampers and any
other gas-fired burning appliance to their previous
conditions of use.
9. The furnace may be used for temporary heating of build-
ings or structures under construction only when the
following conditions have been met:
a. The furnace venting system must be complete
and installed per manufacturers instructions.
b. The furnace is controlled only by a room ther-
mostat (no field jumpers).
c. The furnace return air duct must be complete
and sealed to the furnace and clean air filters
are in place.
d. The furnace input rate and temperature rise
must be verified to be within nameplate mark-
ing.
e. 100% of the furnace combustion air require-
ment must come from outside the structure.
Safety signal words are used to designate a degree or
level of seriousness associated with a particular haz-
ard. The signal words for safety markings are
WARN-
ING
and
CAUTION
.
a.
WARNING
indicates a potentially hazardous situa-
tion which, if not avoided, could result in death or
serious injury.
b.
CAUTION
indicates a potentially hazardous situa-
tion which, if not avoided, may result in minor or
moderate injury. It is also used to alert against un-
safe practices and hazards involving only property
damage.
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