CAUTION
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.
WARNING
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.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning 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 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 25 for location of hood within
the unit and Figure 26 for installation of the hood. If
necessary, a flue exhaust extension may be installed
at the point of installation.
Figure 25: Flue Exhaust Hood Shipping Location
Figure 26: Flue Exhaust Hood Installed
Options/accessories
Economizer
The Economizer can be a factory installed option
or a field installed accessory. If factory installed,
refer to the instructions included with the
outdoor air hood to complete the assembly. Field
installed Economizer accessories include complete
instructions for installation.
There are two Economizer options. Each is specific
to footprint and unit voltage:
1. Vertical Flow application with barometric relief
standard.
INSTALLATION MANUAL ZY SERIES 3 - 10 ton 60 Hertz R-410A
80
Johnson Controls Ducted Systems
Содержание ZY Series
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