Pilot's Operating Handbook
Section 7
Description
Edition 1 - January 15, 2018
Rev. 5
Page 7.10.1
7.10 - Emergency oxygen system - see figure 7.10.1
The
gaseous oxygen system is to be used by the crew and the passengers when the
cabin altitude is greater than 10000 ft following a loss of pressurization, or if there is
smoke or fumes in the cabin.
USE OXYGEN MASK appears in the MFD CAS window (in normal conditions) and
the USE OXYGEN MASK/USE OXYGEN MASK aural warning alert sounds when the
cabin altitude is greater than 10000 ft.
The oxygen reserve is contained in an oxygen cylinder made of composite material
and located outside of the pressurized cabin in a compartment in the right wing fairing.
Its capacity is 50.3 cu.ft (1425 litres) STPD and use limit pressures are :
- maximum pressure 1850 PSIG (127 bars) at 70° F (21° C). The maximum
pressure for different outside temperatures is provided in section 8, figure
8.7.4, as well as on a placard on the inside of the cylinder service door,
- minimum pressure 217 PSIG (15 bars).
▲ CAUTION ▲
If the oxygen cylinder pressure falls below the minimum, the cylinder
must be purged before refilling.
Inform maintenance department.
▲
The oxygen cylinder head is equipped with :
- a hand-controlled isolation valve to permit cylinder installation and removal,
- a microswitch that triggers O2 CYL CLOSED . This message is ON when the
isolation valve is closed,
- a graduated pressure gauge,
- a charging valve ; refer to the replenishment procedure in section 8,
- an overpressure system consisting of a safety disc. This disc is designed to
rupture between 2500 and 2775 PSIG (172 and 191 bars) discharging the
cylinder contents overboard,
- a pressure-reduction valve that regulates oxygen pressure to the masks at
between 64 and 85 PSIG (4.4 and 5.9 bars),
- a low pressure safety valve calibrated to 116 PSIG (8 bars).
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