Lennox VPB Series, Инструкция по установке и эксплуатации

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Atmosphere
Relief
valve
≥20 feet (6.1 m)
Refrigerant Discharge
For systems containing more than 110 lb (50 kg)
of R-410A refrigerant, pressure-relief devices and
fusible plugs shall discharge to the atmosphere
at a location not less than 15 ft (4.57 m) above
the adjoining ground level and not less than 20 ft
Figure 22. Refrigerant Discharge
(6.1 m) from any window, ventilation opening, or
exit in any building. Local codes may lower this
charge limit and shall be investigated by the design
engineer.