Schwank STS-JZ Installation & Owner's Manual page 24

FIGURE 7 ORIENTATION OF FLEXIBLE GAS CONNECTOR
The flexible gas connector MUST be installed in the orientation shown below as
required by national installation codes and by the certification standard of this
heater. This orientation protects the flexible gas connector from damage due to
movement during heater expansion.
It is the responsibility of the installer to ensure correct installation of the flexible
The flue vent, and combustion air duct (if installed) must also be configured in such a manner
that the normal expansion of the heater will be accommodated.
STS-JZ-F / IQ-F I&O Manual Z83.20-2016
IM101220
RD: APR 2019
RL: 20C
24
See Section 11.