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canadair chaHencjer OPERATING MANUAL PSP 606 SECTION 2 AIR CONDITIONING/PRESSURIZATION TABLE OF CONTENTS Subject Page AIR CONDITIONING 1 General Bleed Air Control System Refrigeration System 7 | Ventilation System 8A Temperature Control 10 Footwarmer and Demister 12 Avionics Cooling PRESSURIZATION 13 General Outflow Valves Cabin Pressurization Control Panel 14 Automatic Selector Manual Regulator Emergency Depressurization Switch/light Emergency Pressurization Switch/light Emergency Air Ventilation Switch/light Low Pressure Warning Light 17 Ground Control Subsystem Safety Relief Systems Cabin Altitude Li miters Automatic Operation Manual Operation 18 LIST OF ILLUSTRATIONS Figure Number Title Page 1 Air Conditioning and Pressurization Control Panels 2 2 Air Conditioning System - Schematic 3/4 3 Air Conditioning Unit (ACU) - Schematic 5/6 4 Bleed Air Control Panel 9 2-CONTENTS Page 1 Feb 12/88 canadair chauenQer OPERATING MANUAL PSP 606 Fi gure Number Title Page 5 Temperature Control Panel 11 6 Cabin Pressurization Control Panel (2 Sheets) 15 7 Cabin Pressure Control - Schematic 19 8 Cabin Altitude Indicator 20 2 - CONTENTS Page 2 Mar 01/85 canaaair chaiiencjer OPERATING MANUAL PSP 606 SECTION 2 AIR CONDITIONING/PRESSURIZATION AIR CONDITIONING (Figures 1, 2 and 3) A. General The air conditioning system provides complete environmental control for the cabin and flight compartment. The system also provides air for instrument cooling, windshield demist and flight compartment footwarmers. The avionics equipment in the underfloor area is cooled by flight compartment exhaust air. Two air cycle type air conditioning units, designated ACU 1 and ACU 2, deliver cold and conditioned air to the cabin and flight compartment. Air for operation of the ACUs is delivered from the bleed air manifold of the bleed air system and is supplied by engine bleeds, the APU or a ground air source (refer to Section 17, POWER PLANT for details of the aircraft bleed system). The cabin and flight compartment temperatures are controlled either automatically or manually and may be selected from 16 to 32°C (60 to 90°F). The air conditioning system includes a bleed air control system, a refrigeration system, a cold and conditioned air ventilation system, and a cabin and flight compartment temperature control system. B. Bleed Air Control System (Figure 4) Bleed air from the bleed air manifold enters the ACUs via associated pressure regulator and shutoff valves controlled by the L and R ACU switch/lights on the BLEED AIR panel. Each pressure regulator and shutoff valve delivers air to its ACU at a regulated pressure of either 39.5 or 24.0 psi. The higher pressure, which improves ACU cooling on the ground and ensures that a sufficient volume of air is available to the system during single ACU operation, is delivered whenever a weight-on-wheels signal is present or when only one of the ACUs is in operation. The lower pressure is delivered when both ACUs are in operation and no weight-on-wheels signal is present. An exception to the sequence of pressure delivery occurs if engine bleed air is selected when the aircraft is on the ground. In this case, the lower pressure is delivered, regardless of the number of ACUs in operation or the weight-on-wheels signal, to prevent pressure surges through the ACU if engine air is selected after relatively low pressure air from the APU or a ground air source has been used to pressurize the bleed air manifold. SECTION 2 Page 1 Mar 01/85 canadair cftanenqer OPERATING MANUAL PS P 606 ^ CABIN PRESSURIZATION 'O; CABIN (PRESS LOWl MODE AUTO ^ v EMER ' RAM EMER DEPRESS AIR VENT PRSSSN S 2I If ON E CABIN PRESSURIZATION CONTROL PANEL CABIN ALTITUDE INDICATOR LOOP A BOTH L00PB LING — || "BLEED-1 1 CLOSED DUCT 1 FAIL 1 — ISOL OPEN — R ENG 1 || BLEED || CLOSED DUCT [1 FAIL || BLEED AIR CONTROL PANEL © ® TEMPERATURE CONTROL @ COCKPIT CABIN STANDBY NORMAL - v J L / " MAN STANDBY NORMAL - \ J L r * MAN ® COLD HOT COLD HOT TEMPERATURE CONTROL PANEL © Air Conditioning and Pressurization Control Panels Figure 1 SECTION 2 Page 2 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：Bombardier-Challenger_00-Air_Cond_and_Pressl
