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Note: Installation of this furnace at altitudes
above 2000 ft (610 m) shall be in accordance
with local codes, or in the absence of local
codes, the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 or National Standard of
Canada, Natural Gas and Propane Installation
Code, CSA B149.1.
Figure 29: Typical two stage gas valve
Installation Manual ZL Series 7.5- 12.5 Ton 60 Hertz R-410A
73
Johnson Controls Ducted Systems
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