Fedders F80A - Manual (Page 13)

12
WARM AIR FURNACE
WARNING
THIS FURNACE IS FACTORY EQUIPPED TO BURN NATURAL
GAS ONLY.
CONVERSION TO L.P. GAS REQUIRES SPECIAL KIT No.
30482.
FAILURE TO USE THE PROPER CONVERSION KIT CAN
CAUSE FIRE, EXPLOSION, CARBON MONOXIDE
POISONING, PROPERTY DAMAGE, PERSONAL INJURY OR
LOSS OF LIFE.
CAUTION
CONVERSION OF THIS FURNACE REQUIRES SPECIALIZED
EQUIPMENT. A TRAINED AND QUALIFIED INSTALLER,
SERVICE AGENCY OR GAS SUPPLIER MUST COMPLETE
CONVERSION.
CAUTION
CONNECT THIS FURNACE ONLY TO GAS SUPPLIED BY A
COMMERCIAL UTILITY OR SUPPLIER. PRIVATE GAS WELLS
DO NOT GENERALLY PROVIDE GAS WITH CONSISTENT,
UNIFORM AND PREDICTABLE HEATING VALUES AND
DENSITIES. MANY NONCOMMERCIAL WELLS CONTAIN
IMPURITIES SUCH AS SULPHUR, WHICH MAY DAMAGE
THE FURNACE. THIS FURNACE CANNOT OPERATE
PROPERLY OR SAFELY USING FUELS OUTSIDE NORMAL
COMMERCIAL STANDARDS.
GAS SUPPLY EXISTING VENT CONSIDERATIONS
If this furnace is to replace a Category I type furnace
connected to a chimney serving other appliances, steps must
be taken to ensure that this furnace and the remaining
appliances will vent properly after the removal of the existing
furnace. There is a chance that the existing chimney will be too
large.
Check the size of the existing vent or chimney. It should be
sized as though this is a new installation. If it is not, undertake
remedies to correct the size.
Check the condition of the existing vent or chimney. Examine
vent or chimney cleanouts to make sure that they remain
tightly closed when not in use. Ensure that the vent or
chimney passageway is clear and free from obstructions. Look
for evidence of condensation damage or deterioration in the
vent or chimney. Either of these conditions indicates an
inadequate vent. Missing mortar in the top few courses of
brick in a masonry chimney is a definite sign of condensation
damage.
If the vent or chimney is found to be damaged or inadequate,
it must be repaired or replaced. The repaired or replacement
vent or chimney must meet the standards prescribed in ANSI
Z223.1 National Fuel Gas Code (NEPA 54), in the United States
or CAN/CSA-B149, Natural Gas and Propane Installation Code
in Canada.
When the new furnace is connected to a common vent, the
new furnace and the other appliances connected to the
common vent must be tested individually following these
steps:
1. Permanently seal any unused openings into the common
vent system.
2. Visually inspect the venting system for proper size and
horizontal pitch and determine that there is no blockage,
restriction, leakage, corrosion, collapsed materials such as
fallen bricks, or any other deficiency that could lead to an
unsafe condition.
3. Insofar as practical, duplicate winter operating conditions
such as closing all windows and doors in the building. If the
remaining appliances are in a mechanical room, close the
door to the room.
4. Close the fireplace dampers if any.
5. Turn on any appliances that exhaust air to the outdoors on
maximum speed. This would include clothes dryers, range
hoods, bathroom fans, etc. Attic fans or other fans used
only in summer should be exempted from the test.
6. Follow the lighting instructions of the appliance being
tested and turn it on to continuous operation.
7. For appliances equipped with draft hoods, test for spillage
at the draft hood relief opening after 5 minutes of main
burner operation. Detect for spillage using a match flame,
taper (candle), or the smoke from a cigarette, cigar or pipe.
8. After it has been proven that each appliance to remain
connected to the common venting system properly vents
when tested as listed above, return the windows, doors,
fireplace dampers, appliances, etc. to the condition they
were in prior to the test.
9. If improper venting is observed during any of the tests, the
common venting system must be resized. In the United
States, refer to the latest ANSI Z223.1 National Fuel Gas
Code (NEPA 54), or AGA-GAMA Venting Tables for Category
I furnaces. In Canada, refer to the latest addition of
CAN/CSA-B149, Natural Gas and Propane Installation Code.
GAS PIPING
In the United States, the gas piping should be installed in
accordance with ANSI Z223.1 / NFPA 54 and any local codes.
In Canada, the gas piping should be installed in accordance
with CAN/CSA-B149, and in accordance with any local codes.
The gas piping may enter the furnace from either side.
Install a BMI ground joint union between the gas valve and
the side panel to allow easy removal of the burner for
service purposes.
IMPORTANT: ALWAYS USE A BACKUP WRENCH TO PREVENT
TWISTING OF THE CONTROL ASSEMBLY AND GAS VALVE.
ANY STRAINS ON THE GAS VALVE CAN AFFECT
POSITIONING OF THE ORIFICES RELATIVE TO THE BURNERS.
THIS COULD RESULT IN FAULTY BURNER OPERATION.
Install a manual gas shutoff valve and dirt pocket as close to
the furnace as possible. Some local codes call for the manual
gas shutoff valve to be located between 4 to 5 feet above
floor level to prevent tampering by small children. Ensure
that the valve is readily accessible.
If local codes allow the use of a flexible gas appliance
connector, always use a new listed connector. Do not use a
connector which has previously serviced another gas
appliance.