Combustion Air And Flue Exhaust - York International ZQ Series Installation Manual

WARNING
Natural gas may contain some propane. Propane is
an excellent solvent and will quickly dissolve white
lead and most standard commercial compounds. A
special pipe dope must be used when assembling
wrought iron or steel pipe. Shellac based compounds
such as Gaskolac or Stalastic, and compounds such
as Rectorseal #5, Clydes's or John Crane may be
used.
4. All piping should be cleaned of dirt and scale
by hammering on the outside of the pipe
and blowing out loose particles. Before initial
start-up, be sure that all gas lines external to
the unit have been purged of air.
5. The gas supply should be a separate line and
installed in accordance with all safety codes as
prescribed under Limitations.
6. A 1/8-inch NPT plugged tapping, accessible
for test gauge connection, must be installed
immediately upstream of the gas supply
connection to the unit.
7. After the gas connections have been
completed, open the main shut-off valve
admitting normal gas pressure to the mains.
Check all joints for leaks with soap solution or
other material suitable for the purpose. NEVER
USE A FLAME.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could
result in serious injury, death or propery damage.
Never test for gas leaks with an open flame. Use
a commercially available soap solution made
specifically for the detection of leaks to check all
connections. A fire or explosion may result causing
property damage, personal injury, or loss of life.
The furnace and its individual shut-off valve must
be disconnected from the gas supply piping system
during any pressure testing at pressures in excess of
1/2 PSIG.
Pressures greater than 1/2 PSIG will cause gas valve
damage resulting in a hazardous condition. If it is
subjected to a pressure greater than 1/2 PSIG, the
gas valve must be replaced.
The furnace must be isolated from the gas supply
piping system by closing its individual manual shut-
off valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than
1/2 PSIG.
Threaded joints should be coated with a sealing
compound that is resistant to the action of liquefied
petroleum gases. Do not use Teflon tape.
Check all connections for leaks when piping is
completed using a soap solution. NEVER USE A
FLAME.
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could
result in serious injury, death or propery damage.
Never test for gas leaks with an open flame. Use
a commercially available soap solution made
specifically for the detection of leaks to check all
connections. A fire or explosion may result causing
property damage, personal injury or loss of life.

Combustion Air and Flue Exhaust

Venting slots in the heating compartment access
panel remove the need for a combustion air hood.
The gas heat flue exhaust is routed from the
unit through a field installed exhaust hood with
screen. See Figure 21 for location of hood within
the unit and Figure 22 for installation of the hood. If
necessary, a flue exhaust extension may be installed
at the point of installation.
INSTALLATION MANUAL ZQ SERIES 3 - 5 ton 60 Hertz R-410A
Johnson Controls Ducted Systems
CAUTION
WARNING
WARNING
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