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507389-01
Issue 1504
Never use a flame to check for gas leaks. Explosion causing
injury or death may occur.
CAUTION
for supplying air for combustion, nor is a chimney required.
The vent outlet must not be altered or extended.
The venting system is designed for proper operation under all
weather conditions and for winds up to 31 m.p.h.
Removal of Unit from Common Venting System
When an existing furnace is removed from a common venting
system serving other appliances, the venting system is likely to be
too large to properly vent the remaining attached appliances. The
following test should be conducted with each appliance while
the other appliances connected to the common venting system
are not in operation.
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion, or other deficiencies which
could cause an unsafe condition.
3. Insofar as is practical, close all building doors and windows
between the space in which the appliances remaining
connected to the common venting system are located and
other spaces in the building. Turn on clothes dryers and any
appliance not connected to the common venting system.
Turn on exhaust fans, such as range hoods and bathroom
exhausts, so they will operate at maximum speed. Do not
operate a summer exhaust fan. Close fireplace dampers.
4. Following the lighting instructions, place the unit being
inspected in operation. Adjust the thermostat so the
appliance will operate continuously.
5. Test for spillage at the draft control relief opening after 5
minutes of main burner operation. Use the flame of a match
or candle.
6. Follow the preceding steps for each appliance connected to
the common venting system.
7. After it has been determined that each appliance remaining
connected to the common venting system properly vents
when tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers, and any other fuel burning
appliance to their previous condition of use.
8. If improper venting is observed during any of the above tests,
the common venting system must be corrected.
See National
Fuel Gas Code, ANSI Z223.1 (latest edition) or CAN/CGA
B149.1 & .2 Canadian Installation Codes to correct improper
operation of common venting system.
Gas Connections
The gas line to the unit should be adequately sized to prevent
undue pressure drop and should never be smaller than the
manual valve used. Consult the local utility or National Fuel Gas
Code for complete details on special requirements in sizing gas
piping.
The units supplied for operation with natural gas contain a
gas regulator which must be operated with inlet gas pressures
specified on the rating plate. If gas line pressure exceeds this
figure, an additional high pressure regulator must be installed
to reduce this pressure.
Units for operation with propane must be converted with a
kit supplied by the manufacturer and require for operation an
inlet pressure of 11” W.C. minimum and 13” W.C. maximum. A
regulator is also required on the propane tank.
If local codes allow use of a flexible gas connector, a new listed
connector must be used. Do not use a connector which has
previously serviced another gas appliance.
If a flexible gas connector is required or allowed by the
authority that has jurisdiction, black iron pipe shall be
installed at the gas valve and extend outside the furnace
cabinet. The flexible connector can then be added
between the black iron pipe and the gas supply line.
CAUTION
Compounds used on threaded joints of gas piping must
be resistant to the actions of liquified petroleum gases.
IMPORTANT