Learjet 20 Series Pilot Training Manual page 199

LH EXTERNAL
DEFOG OUTLET
PLENUM CHAMBER
WATER
ACCUMULATOR
DEFOG RELAY
LH
ENGINE
SHUTOFF
VALVE
* SNs 23-003 THROUGH 23-008
10A-6
LEARJET 20 SERIES PILOT TRAINING MANUAL
CHECK VALVE
INTERNAL DEFOG
PULL
PULL
PILOT'S
EXTERNAL
DEFOG
SHUTOFF
VALVE
CONDITIONING
Figure 10A-6. Defog System—Model 23
FOR TRAINING PURPOSES ONLY
INTERNAL
OUTLETS
PLENUM CHAMBER
COPILOT'S
EXTERNAL DEFOG
PULL
TO FOOTWARMER
DEFOG
CHECK VALVE
TO
AIR-
SYSTEM
FlightSafety
international
RH EXTERNAL
DEFOG OUTLET
(OPTIONAL)
WATER
ACCUMULATOR
220°–180°F
W/S O'HEAT
OFF
RH
ENGINE
SHUTOFF
VALVE