A.O. Smith ATX-199, Инструкция по эксплуатации

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Power Supply (page 14) Gas Supply
Pressure Requirements (page 13)
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Fire and Explosion Hazard
Leak test gas connections before
placing water heater in operation.
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gas shutoff valve before leak
testing heater.
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CAN/CSA B149.1.
Use joint compound or Teflon tape
compatible with propane gas.